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Bourne, Juliet C. (Juliet Cassandra). "Setting language parameters using genetic algorithms." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/109629.
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Sonn, Jong Suk. "Ink Setting Fundamentals a Focus on Ink Parameters." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/SonnJS2011.pdf.
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Wallman, Kaj Mikael Joakim. "Computational methods for the estimation of cardiac electrophysiological conduction parameters in a patient specific setting." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:2d5573b9-5115-4434-b9c8-60f8d0531f86.
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Cardiovascular disease is the primary cause of death globally. Although this group encompasses a heterogeneous range of conditions, many of these diseases are associated with abnormalities in the cardiac electrical propagation. In these conditions, structural abnormalities in the form of scars and fibrotic tissue are known to play an important role, leading to a high individual variability in the exact disease mechanisms. Because of this, clinical interventions such as ablation therapy and CRT that work by modifying the electrical propagation should ideally be optimized on a patient specific basis. As a tool for optimizing these interventions, computational modelling and simulation of the heart have become increasingly important. However, in order to construct these models, a crucial step is the estimation of tissue conduction properties, which have a profound impact on the cardiac activation sequence predicted by simulations. Information about the conduction properties of the cardiac tissue can be gained from electrophysiological data, obtained using electroanatomical mapping systems. However, as in other clinical modalities, electrophysiological data are often sparse and noisy, and this results in high levels of uncertainty in the estimated quantities. In this dissertation, we develop a methodology based on Bayesian inference, together with a computationally efficient model of electrical propagation to achieve two main aims: 1) to quantify values and associated uncertainty for different tissue conduction properties inferred from electroanatomical data, and 2) to design strategies to optimise the location and number of measurements required to maximise information and reduce uncertainty. The methodology is validated in several studies performed using simulated data obtained from image-based ventricular models, including realistic fibre orientation and conduction heterogeneities. Subsequently, by using the developed methodology to investigate how the uncertainty decreases in response to added measurements, we derive an a priori index for placing electrophysiological measurements in order to optimise the information content of the collected data. Results show that the derived index has a clear benefit in minimising the uncertainty of inferred conduction properties compared to a random distribution of measurements, suggesting that the methodology presented in this dissertation provides an important step towards improving the quality of the spatiotemporal information obtained using electroanatomical mapping.
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Lathouri, Maria. "Assessment of the temporal variability of surface water quality parameters in setting environmental quality standards for metals." Thesis, Imperial College London, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.550232.
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Metals, such as copper, zinc, cadmium, nickel and lead, can vary significantly in concentration over time and across small specified areas at the micro scale (geographic regions), either naturally or also due to human activities, such as urbanization, industrial and agricultural activities. Their chemical forms and distribution control their mobility, bioavailability and subsequent potential for toxicity which, in turn, dictates surface water quality. The physicochemical forms in which a metal ion is present (i.e. its speciation) determine the behaviour of the metal and therefore its bioavailability and toxicity due to biological accessibility in the environment. Bioavailability of a metal is expressed as the fraction of the metal that the organism is proximately exposed to during a given time and under defined conditions. It is generally accepted that the total metal concentrations in surface water are not considered to be very representative of the metal fraction that is taken up by the aquatic organisms, while the free metal ion [M"+] is considered to be the most toxic metal species. The complexation of metals by ligands has an important influence on the speciation of metals in natural waters, reducing the free metal aqueous activity and affecting the metal bioavailability and toxicity. Like all substances, metals can behave as contaminants, when present in excess, posing risks to the environment. As part of water quality management regimes, these risks are managed through the establishment of Environmental Quality Standards (EQS). EQS define concentrations of the metals in the surface water environment that are protective of the aquatic life. Current EQS values are based either on total or dissolved metal concentrations; however, they do not consider whether metals are in potentially bioavailable forms, or seasonal variability that would affect their bioavailability and potential for toxicity over time. Considering these limitations the objectives of the presented research were: to identify the temporal variability of chemical and physical determinands in a variety of aquatic environments and identify any changes that may significantly affect the quality of the aquatic system, to assess the temporal variability of metal speciation and bioavailability/toxicity through the use of chemical equilibrium and toxicity models, to assess the temporal variability in water quality using the present EQS for metals (Cu, Zn, Cd, Ni and Pb), based on total and dissolved concentrations, as well as the chemical equilibrium and toxicity modelling results, to evaluate the performance of the standard and bioavailability/toxicity based EQS setting methods in a variety ofUK surface water systems. The geochemical modelling studies have been carried out using two chemical equilibrium models: the Windermere Humic Ion Binding Model (WHAM) and the PHREEQC model. The Biotic Ligand Model (BLM) was utilised to assess the acute and chronic toxicity and to estimate the effects of Cu, Zn and Cd concentrations for acute; as well of Cu concentration for chronic toxicity for the aquatic organism Daphnia magna.
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Shah, Sandeep. "Setting parameters in MRP for the effective management of bought-out inventory in a JIT assembly environment." Thesis, Aston University, 1992. http://publications.aston.ac.uk/10845/.
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In recent years, UK industry has seen an explosive growth in the number of `Computer Aided Production Management' (CAPM) system installations. Of the many CAPM systems, materials requirement planning/manufacturing resource planning (MRP/MRPII) is the most widely implemented. Despite the huge investments in MRP systems, over 80 percent are said to have failed within 3 to 5 years of installation. Many people now assume that Just-In-Time (JIT) is the best manufacturing technique. However, those who have implemented JIT have found that it also has many problems. The author argues that the success of a manufacturing company will not be due to a system which complies with a single technique; but due to the integration of many techniques and the ability to make them complement each other in a specific manufacturing environment. This dissertation examines the potential for integrating MRP with JIT and Two-Bin systems to reduce operational costs involved in managing bought-out inventory. Within this framework it shows that controlling MRP is essential to facilitate the integrating process. The behaviour of MRP systems is dependent on the complex interactions between the numerous control parameters used. Methodologies/models are developed to set these parameters. The models are based on the Pareto principle. The idea is to use business targets to set a coherent set of parameters, which not only enables those business targets to be realised, but also facilitates JIT implementation. It illustrates this approach in the context of an actual manufacturing plant - IBM Havant. (IBM Havant is a high volume electronics assembly plant with the majority of the materials bought-out). The parameter setting models are applicable to control bought-out items in a wide range of industries and are not dependent on specific MRP software. The models have produced successful results in several companies and are now being developed as commercial products.
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Gelderblom, Wentzel Christoffel Andreas. "Mycotoxicological properties of fusarium verticillioides and the fumonisins : mechanisms and implications for setting risk assessment parameters in humans." Thesis, Stellenbosch : Stellenbosch University, 2009. http://hdl.handle.net/10019.1/3971.
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Thesis (DSc (Biochemistry))--Stellenbosch University, 2009.The fumonisin mycotoxins are known to be the causative principle for several animal diseases and are associated with the development of liver and oesophagus cancer and neural tube defects in humans. The thesis focuses mainly on the characterisation of the compounds from maize cultures of the fungus Fusarium verticillioides, isolated from maize, the toxicological effects in animals, mechanism involved in hepato- and nephrocarcinogenicity and discussing the major differences and contradictions in the literature together with their impact on setting relevant risk assessment parameters to safeguard human health. Controversies include the importance of non-genotoxicity vs genotoxicity in the development of cancer, the role of threshold effects in carcinogenesis and the establishment of realistic risk assessment parameters that will also be applicable in developing countries. Recent approaches suggest that thresholds should also apply for genotoxic carcinogens as interaction with the DNA is only one event in the multi-step process of cancer development and therefore could not be taken as the basis for applying a no-effect threshold for genotoxins. It would appear that a carcinogen such as fumonisin, whether it is labeled genotoxic or non-genotoxic per se, exhibits some degree of risk at any level due to additive or synergistic interactions with other xenobiotics and/or dietary constituents. The underlying mechanisms of fumonisin-induced carcinogenicity includes the disruption of sphingolipid, phospholipids and fatty acid metabolism, which plays a major role in the modulation of apoptotic and cell proliferative pathways related to cancer development. Interactive responses between arachidonic acid and ceramide affect downstream cell signal transduction pathways and depending on the cell type the disruption of these pathways could either stimulate or inhibit cell proliferation which eventually will determine the induction of apoptosis and hence affect cell survival. The modulating roles of dietary constituents such as vitamins, protein and the South African herbal teas are also highlighted as they affected the outcome of toxicological assays, thus determining thresholds of the adverse effects in specific target organs that will impact risk assessment parameters. Regulation of the fumonisins in food and the associated risk are debated from many perspectives. In developing countries there is a lack of quality control implying that maize highly contaminated with mycotoxins may directly enter the food chain of adults and children as control of mycotoxins is difficult or in some cases totally absent. The interaction of politics, economy and technology will eventually determine the impact on health as the regulation of fumonisin in food differs between countries. Knowledge about the biological effects of the fumonisins is currently playing an important role in the development of simple and inexpensive methods to reduce the levels of the fumonisin in maize by targeting specific populations at risk.
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Kučera, Michal. "3D vodní paprsek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231503.
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This master thesis deals with the use and technological capabilities of abrasive water jet in the application of 3D cutting head. One part of this thesis is the description of waterjet technology and its other applications. The experimental comparison of the effect of the parameters was carried out for different materials Mach 4 equipment Flow International Corporation in company AWAC, spol. s.r.o. and subsequently the workpieces were subjected to evaluation of the shape and dimensional accuracy.
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Khalifa, Muftah. "Parameters Controlling Distribution of Diagenetic Alterations within Fluvial and Shallow Marine Sandstone Reservoirs : Evidence from the Libyan Basins." Doctoral thesis, Uppsala universitet, Mineralogi, petrologi och tektonik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-284581.
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This thesis demonstrates that geological setting, depositional facies, open system flux of hot basinal brines and descending of shallow waters have a strong impact on the distribution of the diagenetic alterations within continental and paralic/shallow marine sandstones which in turn control the quality and heterogeneities of the reservoirs. Geological setting controls the mineralogical and textural maturity of sandstone, whereas depositional facies control the pore water chemistry (marine, brackish or meteoric), sedimentary texture and sand body geometry. Eogenetic alterations in the fluvial deposits are dominated by precipitation of infiltrated clays, kaolinitization of detrital silicates, whereas the shallow marine deposits are dominated by precipitation of early calcite and kaolinite. Conversely mesogenetic alterations are dominated by clay minerals transformation, quartz overgrowths and Ferroan- carbonates, barite and anhydrite. Flux of hot basinal brines is evidenced by precipitation of mesogenetic minerals that lack of internal sources (e.g. barite, anhydrite and ferroan carbonate cements), which is evidenced by: (1) restricted occurrence of these minerals in downthrown blocks. (2) The high fluid inclusion homogenization temperatures (Th) of quartz overgrowths (Th > 110-139°C), and carbonate cements (T > 80-140°C), which also have light δ18OV-PDB(-17.6‰ to -6.7‰). Flux of hot basinal brines is further evidenced by occurrence of saddle Fe-dolomite along stylolites. Fluid inclusion microthermometry further revealed a dramatic shift in pore- water chemistry from NaCl dominated brines during precipitation of quartz overgrowths to NaCl-CaCl2 dominated brines during cementation by Fe-dolomite. Presence of mixed brine (NaCl+CaCl2) systems in the fluid inclusions suggests flux of descending waters, which have circulated in the overlying carbonate-evaporite successions. The restricted occurrence of oil- filled inclusion to quartz overgrowths and methane to Fe-carbonate cements suggest migration of oil during precipitation by quartz and migration of methane during precipitation by Fe- carbonate cements. The extensive mesogenetic cements in the down thrown blocks is attributed to flux of basinal brines along deep seated faults, i.e. open system diagenesis. Integration of fluid inclusion microthermometry, isotopes, Raman spectrometry and thermal tectonic evolution of basins are essential techniques for unraveling the evolution of basinal fluids, cementation conditions and relative timing of hydrocarbons migration.Errata: Felaktigt disputationsdatum på spikbladet.
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Wirzberger, Maria, Robert Herms, Shirin Esmaeili Bijarsari, Maximilian Eibl, and Günter Daniel Rey. "Schema-related cognitive load influences performance, speech, and physiology in a dual-task setting: A continuous multi-measure approach." BioMed Central Limited, 2018. https://monarch.qucosa.de/id/qucosa%3A33154.
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Schema acquisition processes comprise an essential source of cognitive demands in learning situations. To shed light on related mechanisms and influencing factors, this study applied a continuous multi-measure approach for cognitive load assessment. In a dual-task setting, a sample of 123 student participants learned visually presented symbol combinations with one of two levels of complexity while memorizing auditorily presented number sequences. Learners’ cognitive load during the learning task was addressed by secondary task performance, prosodic speech parameters (pauses, articulation rate), and physiological markers (heart rate, skin conductance response). While results revealed increasing primary and secondary task performance over the trials, decreases in speech and physiological parameters indicated a reduction in the overall level of cognitive load with task progression. In addition, the robustness of the acquired schemata was confirmed by a transfer task that required participants to apply the obtained symbol combinations. Taken together, the observed pattern of evidence supports the idea of a logarithmically decreasing progression of cognitive load with increasing schema acquisition, and further hints on robust and stable transfer performance, even under enhanced transfer demands. Finally, theoretical and practical consequences consider evidence on desirable difficulties in learning as well as the potential of multimodal cognitive load detection in learning applications.
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Pazour, Miroslav. "Časový vývoj reologických parametrů strusky aktivované různými aktivátory." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449706.
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Tato diplomová práce se zabývá aktuálními poznatky, společně s optimalizací oscilačních měření pomocí hybridního reometru, ale hlavně pozorováním změn reologických parametrů v čase past mleté granulované vysokopecní strusky aktivované různými aktivačními roztoky s koncentrací alkálií M: 4 and 7.5 moldm. Výsledky byly pro diskuzi podpořeny výstupy z Vicatovy metody a izotermické kalorimetrie. Nejprve bylo zjištěno, že limit lineární viskoelastické oblasti se zmenšuje v čase. Dále bylo pozorováno, že v time sweep testech vykazovala struska aktivovaná křemičitany nejnižší hodnoty komplexního modulu a struska aktivovaná hydroxidy o koncentraci 4 moldm nejvyšší hodnoty a ostatní pasty vykazovaly hodnoty mezi těmito dvěma extrémy a měly mezi sebou porovnatelné hodnoty. Podobný trend byl pozorován u vývoje kritické meze oscilačního napětí, získaného z amplitude sweep testů (přerušovaně a nepřerušovaně). Oba výše zmíněné parametry, komplexní modul a mez napětí, se vyvíjely v čase. Výsledky všech testů jasně ukázaly, že povrchová chemie hraje roli ve výsledném reologickém chování. Odsud, povaha a koncentrace aktivátoru ovlivňují reologické vlastnosti skrze efekty Na a K iontů, stejně tak skrze koncentraci, která má dopad na elektickou dvojnou vrstvu. Reologické chování může být také ovlivněno dalšími faktory, např. viskozitou aktivačního roztoku a celkovou kinetikou hydratačního procesu.
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Nordström, Didrik. "Declarative modelling of parameter setting." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171087.
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The parameter setting problem is part of a complex, automated process for customizing Scania's products; primarily trucks and buses. The problem is modelled as a stateless, acyclic graph of pure functions and variables. A subset of a deterministic, concurrent, demand-driven, declarative programming model is implemented under the Microsoft .NET framework. The implementation is evaluated based on suitability for solving the parameter setting problem, computational performance and general applicability within the organization. It is concluded that the model reduces the complexity of the parameter setting problem, mainly due to demand-driven (lazy) execution. The implementation scales as expected on sequential programs in time and memory with respect to input size. Parallel programs benefit partly from parallelism but bottlenecks in the .NET framework seem to limit the speedup. The general applicability of the programming model within the organization is potentially high and there are many extensions that can be added in the future, such as constraint programming.Parametersättning är en del av en komplex, automatiserad process för att specialanpassa Scanias produkter – primärt lastbilar och bussar. Problemet är modellerat som en tillståndslös acyklisk graf av rena funktioner och variabler. En deterministisk, parallel, behovstyrd deklarativ programmeringsmodell har implementeras under Microsoft .NET-ramverket. Implementationen utvärderas utifrån lämplighet för parametersättning, prestanda och generell nytta inom organisationen. Modellen lyckas med att reducera komplexiteten för parametersättning, primärt tack vare behovstyrd (lat) exekvering. Implementationen skalar i både tid och minne i enlighet med förväntningarna för sekventiella program. Parallella program har delvis nytta av multipla processorkärnor men flaskhalsar i .NET-ramverket verkar begränsa prestandan. Programmeringsmodellens generella nytta inom organisationen är potentiellt hög och det finns många tillbyggnader som kan läggas till i framtiden, såsom villkorsprogrammering.
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Hepdogan, Seyhun. "META-RAPS: PARAMETER SETTING AND NEW APPLICATIONS." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3493.
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ABSTRACT Recently meta-heuristics have become a popular solution methodology, in terms of both research and application, for solving combinatorial optimization problems. Meta-heuristic methods guide simple heuristics or priority rules designed to solve a particular problem. Meta-heuristics enhance these simple heuristics by using a higher level strategy. The advantage of using meta-heuristics over conventional optimization methods is meta-heuristics are able to find good (near optimal) solutions within a reasonable computation time. Investigating this line of research is justified because in most practical cases with medium to large scale problems, the use of meta-heuristics is necessary to be able to find a solution in a reasonable time. The specific meta-heuristic studied in this research is, Meta-RaPS; Meta-heuristic for Randomized Priority Search which is developed by DePuy and Whitehouse in 2001. Meta-RaPS is a generic, high level strategy used to modify greedy algorithms based on the insertion of a random element (Moraga, 2002). To date, Meta-RaPS had been applied to different types of combinatorial optimization problems and achieved comparable solution performance to other meta-heuristic techniques. The specific problem studied in this dissertation is parameter setting of Meta-RaPS. The topic of parameter setting for meta-heuristics has not been extensively studied in the literature. Although the parameter setting method devised in this dissertation is used primarily on Meta-RaPS, it is applicable to any meta-heuristic's parameter setting problem. This dissertation not only enhances the power of Meta-RaPS by parameter tuning but also it introduces a robust parameter selection technique with wide-spread utility for many meta-heuristics. Because the distribution of solution values generated by meta-heuristics for combinatorial optimization problems is not normal, the current parameter setting techniques which employ a parametric approach based on the assumption of normality may not be appropriate. The proposed method is Non-parametric Based Genetic Algorithms. Based on statistical tests, the Non-parametric Based Genetic Algorithms (NPGA) is able to enhance the solution quality of Meta-RaPS more than any other parameter setting procedures benchmarked in this research. NPGA sets the best parameter settings, of all the methods studied, for 38 of the 41 Early/Tardy Single Machine Scheduling with Common Due Date and Sequence-Dependent Setup Time (ETP) problems and 50 of the 54 0-1 Multidimensional Knapsack Problems (0-1 MKP). In addition to the parameter setting procedure discussed, this dissertation provides two Meta-RaPS combinatorial optimization problem applications, the 0-1 MKP, and the ETP. For the ETP problem, the Meta-RaPS application in this dissertation currently gives the best meta-heuristic solution performance so far in the literature for common ETP test sets. For the large ETP test set, Meta-RaPS provided better solution performance than Simulated Annealing (SA) for 55 of the 60 problems. For the small test set, in all four different small problem sets, the Meta-RaPS solution performance outperformed exiting algorithms in terms of average percent deviation from the optimal solution value. For the 0-1 MKP, the present Meta-RaPS application performs better than the earlier Meta-RaPS applications by other researchers on this problem. The Meta-RaPS 0-1 MKP application presented here has better solution quality than the existing Meta-RaPS application (Moraga, 2005) found in the literature. Meta-RaPS gives 0.75% average percent deviation, from the best known solutions, for the 270 0-1 MKP test problems.Ph.D.
Department of Industrial Engineering and Management Systems
Engineering and Computer Science
Industrial Engineering and Management Systems
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Dobslaw, Felix. "Automatic Instance-based Tailoring of Parameter Settings for Metaheuristics." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-14613.
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Many industrial problems in various fields, such as logistics, process management, orproduct design, can be formalized and expressed as optimization problems in order tomake them solvable by optimization algorithms. However, solvers that guarantee thefinding of optimal solutions (complete) can in practice be unacceptably slow. Thisis one of the reasons why approximative (incomplete) algorithms, producing near-optimal solutions under restrictions (most dominant time), are of vital importance. Those approximative algorithms go under the umbrella term metaheuristics, each of which is more or less suitable for particular optimization problems. These algorithmsare flexible solvers that only require a representation for solutions and an evaluation function when searching the solution space for optimality.What all metaheuristics have in common is that their search is guided by certain control parameters. These parameters have to be manually set by the user andare generally problem and interdependent: A setting producing near-optimal resultsfor one problem is likely to perform worse for another. Automating the parameter setting process in a sophisticated, computationally cheap, and statistically reliable way is challenging and a significant amount of attention in the artificial intelligence and operational research communities. This activity has not yet produced any major breakthroughs concerning the utilization of problem instance knowledge or the employment of dynamic algorithm configuration. The thesis promotes automated parameter optimization with reference to the inverse impact of problem instance diversity on the quality of parameter settings with respect to instance-algorithm pairs. It further emphasizes the similarities between static and dynamic algorithm configuration and related problems in order to show how they relate to each other. It further proposes two frameworks for instance-based algorithm configuration and evaluates the experimental results. The first is a recommender system for static configurations, combining experimental design and machine learning. The second framework can be used for static or dynamic configuration,taking advantage of the iterative nature of population-based algorithms, which is a very important sub-class of metaheuristics. A straightforward implementation of framework one did not result in the expected improvements, supposedly because of pre-stabilization issues. The second approach shows competitive results in the scenario when compared to a state-of-the-art model-free configurator, reducing the training time by in excess of two orders of magnitude.
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Ochoa, Gabriela. "Error thresholds and optimal mutation rates in genetic algorithms." Thesis, University of Sussex, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341070.
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Lunev, Alexey. "Evaluation and visualization of complexity in parameter setting in automotive industry." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-362711.
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Parameter setting is a process primary used to specify in what kind of vehicle an electronic control unit of each type is used. This thesis is targeted to investigate whether the current strategy to measure complexity gives user satisfactory results. The strategy consists of structure-based algorithms that are an essential part of the Complexity Analyzer - a prototype application used to evaluate the complexity. The results described in this work suggest that the currently implemented algorithms have to be properly defined and adapted to be used in terms of parameter setting. Moreover, the measurements that the algorithms output has been analyzed in more detail making the results easier to interpret. It has been shown that a typical parameter setting file can be regarded as a tree structure. To measure variation in this structure a new concept, called Path entropy has been formulated, tested and implemented. The main disadvantage of the original version of the Complexity Analyzer application is its lack of user-friendliness. Therefore, a web version of the application based on Model-View-Controller technique has been developed. Different to the original version it has user interface included and it takes just a couple of seconds to see the visualization of data, compared to the original version where it took several minutes to run the application.
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Bong, Hyun Kyung. "Economical parameter-setting in second language acquisition : Japanese-speaking learners of English." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614031.
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Janardhanan, Pillai Unnikrishnan Asan, and Dharani Shanmugavel. "Parameter setting on catalytic controller : Using Design of Experiments and Scanning Electron Microscope Analysis." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Produktutveckling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36115.
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This thesis work has been conducted in the Handheld Laboratory at Husqvarna AB with the purpose of finding the parameters responsible for the performance of the catalytic converters used in the test rig. The catalytic converters are used in the test rig during the long term testing of the chain saws to reduce the hydrocarbon content from the exhaust before it enters into the environment. To perform this research two approaches were carried out. One with Design of Experiment (DOE) and another using Scanning Electron Microscope (SEM) analysis. In Design of Experiments parameters that are suspected to be influencing the performance of the catalytic converter were refined. Using these parameters a test plan is made with the help of statistical analysis application Minitab and the tests were carried out in the test rig. Using SEM the effects of aging and its effect on microstructure and chemical composition on the catalyst surface was analyzed. The results from the DoE shows that the exhaust flow, collector diameter and distance to the muffler are responsible for the collection of exhaust. Distance to the muffler and collector length are the factors affecting the conversion of the exhaust. In addition to that exhaust flow is also responsible for the duration of heating coil running time. The results from the SEM analysis shows that the operating temperature is high due to which there is thermal degradation of catalyst and there is also deactivation due to fouling. Another finding is that the flow on to the catalyst is not uniformly distributed
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Londeen, Marika. "Therapeutic Ultrasound: The Effectiveness of Ultrasound and the Importance of Parameter Settings." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/27104.
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Therapeutic ultrasound can be an important modality for clinician's use to heat tissue. Previous research has concluded that therapeutic ultrasound treatments may be ineffective. There are several options for parameters depending on type of treatment and desired goal. The purpose of this study was to determine if specific parameters for a specific desired treatment goal were correct. The parameters included 1.0 and 3.0 megahertz frequencies of continuous ultrasound treatment on 20 subjects. Tissue temperature was measured with thermocouples in the calf. Data analysis consisted of running a one way repeated measures ANOVA to compare sample means as well as running t-test's for each change in temperature for each setting. Some subjects reached a temperature which could be considered therapeutic and only a few subjects reached the temperature goal. This is important for clinicians to note that every patient is different and that parameters will differ with each machine.
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Rojas, Jose Angel. "Relationship between the sludge settling characteristics and the parameters of the activated sludge system." ScholarWorks@UNO, 2004. http://louisdl.louislibraries.org/u?/NOD,171.
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Thesis (M.S.)--University of New Orleans, 2004.Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Environmental Engineering."--Thesis t.p. Vita. Includes bibliographical references.
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Mancell-Egala, Abdul Salim. "Development of Transitional Settling Regimen Parameters to Characterize and Optimize Solids-liquid Separation Performance." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/72966.
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Novel settling characteristic metrics were developed based on the fundamental mechanisms of coagulation, flocculation, and settling. The settling metrics determined parameters that are essential in monitoring and optimizing the activated sludge process without the need for expensive or specialized equipment. Current settling characteristic measurements that don't require specialized instruments such as sludge volume index (SVI) or initial settling velocity (ISV), have no fundamental basis in solid-liquid separation and only indicate whether settling is good or bad without providing information as to limitations present in a sludge matrix. Furthermore, the emergence of aerobic granulation as a potential pathway to mitigate solid-separation issues further stresses the need for new settling characteristic metrics to enable integration of the new technology with the current infrastructure.
The granule or intrinsic aggregate fraction in different types was of sludge was quantified by simulating different surface overflow rates (SOR). The technique named Intrinsic Settling Classes (ISC) was able to separate granules and floc by simulating high SOR values due to the lack of a flocculation time needed for granules. The method had to be performed in a discrete settling environment to characterize a range of flocculation behavior and was able to classify the granular portion of five different types of sludge. ISC was proven to accurately (±2%) determine the granule fraction and discrete particle distribution. The major significance of the test is its ability to show if a system is producing particles that will eventually grow to become granules. This methodology proved to be very valuable in obtaining information as to the granular fraction of sludge and the granular production of a system.
Flocculent settling (stokesian) was found to be predominant within ideally operating clarifiers, and the shift to 'slower' hindered settling (non-stokesian) causes both failure and poor effluent quality. Therefore, a new metric for settling characteristics was developed and classified as Limit of Stokesian Settling (LOSS). The technique consisted of determining the total suspended solids (TSS) concentration at which mixed liquor settling characteristics transition from stokesian to non–stokesian settling. An image analytical technique was developed with the aid of MATLAB to identify this transition. The MATLAB tool analyzed RGB images from video, and identified the presence of an interface by a dramatic shift in the Red indices. LOSS data for Secondary activated-sludge systems were analyzed for a period of 60 days at the Blue Plains Advanced Wastewater Treatment Plant. LOSS numbers collected experimentally were validated with the Takacs et al. (1991) settling model. When compared to flux curves with small changes in the sludge concentration matrix, LOSS was found to be faster at characterizing the hindered settling velocity and was less erratic.
Simple batch experiments based on the critical settling velocity (CSV) selection were used as the basis for the development of two novel parameters: threshold of flocculation/flocculation limitation (TOF/a), and floc strength. TOF quantified the minimum solids concentration needed to form large flocs and was directly linked to collision efficiency. In hybrid systems, an exponential fitting on a CSV matrix was proposed to quantify the collision efficiency of flocs (a). Shear studies were conducted to quantify floc strength. The methods were applied to a wide spectrum of sludge types to show the broad applicability and sensitivity of the novel methods.
Three different activated sludge systems from the Blue Plains AWWTP were monitored for a 1 year period to explore the relationship between effluent suspended solids (ESS) and activated sludge settling and flocculation behavior. Novel metrics based on the transitional solids concentration (TOF, and LOSS) were also collected weekly. A pilot clarifier and settling column were run and filmed to determine floc morphological properties. SVI was found to lose sensitivity (r < 0.20) when characterizing ISV above a hindered settling rate of 3 m h-1. ISV and LOSS had a strong correlation (r = 0.71), but ISV was subject to change, depending on the solids concentration. Two sludge matrix limitations influencing ESS were characterized by transition concentrations; pinpoint floc formation, and loose floc formation. Pinpoint flocs had TOF values above 400 mg TSS L-1; loose floc formation sludge had TOF and LOSS values below 400 mg TSS L-1 and 900 mg TSS L-1, respectively. TOF was found to correlate with the particle size distribution while LOSS correlated to the settling velocity distribution. The use of both TOF and LOSS is a quick and effective way to characterize limitations affecting ESS.Ph. D.
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Tesan, Graciela Mariel. "What do children have in their heads? functional heads and parameter setting in child language /." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2430.
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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.Thesis research directed by: Linguistics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Braseth, Jørgen. "Automatic Configuration for Collective Construction : Automatic parameter setting for response threshold agents in collective construction." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8748.
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Hasenpusch, Jan, Andreas Hillebrand, and Thomas Vietor. "Erarbeitung eines Beziehungssystems zur Entwicklung eigenschaftsoptimierter Karosseriekonzepte in Mischbauweise." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-214613.
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Aus der Einleitung:
"Verschiedene Zielkonflikte zwischen den Anforderungen bzgl. Sicherheit, Wirtschaftlichkeit und Umweltverträglichkeit resultieren aus den Spannungsfeldern Umwelt, Wirtschaft und Technik (Busche 2014, Braess & Seiffert 2013). Richtungsentscheidungen bei der Festlegung der Anforderungen im Entwicklungsprozess auf Grundlage weniger Informationen bergen die Gefahr fehlerhafter Entscheidungen (Feldhusen & Grote 2013). Wird dies im weiteren Verlauf der Entwicklungsprozesse bemerkt sind Iterationsschleifen verbunden mit hohen Kosten notwendig, um dort nachzubessern (Ehrlenspiel et al. 2007). Der Grund für das große Informationsdefizit am Anfang des Entwicklungsprozesses sind die unbekannten Auswirkungen der Parametervariationen auf die Eigenschaften (Ehrlenspiel 2009). Diese resultieren u.a. aus den restriktiven Anforderungen, neuen Technologien oder alternativen Werkstoffen (Braess & Seiffert 2013). Muss das Nachfolgefahrzeug bspw. länger und flacher, bei gleicher Fahrdynamik werden oder leichter bei schärferen NVH- und Crash-Eigenschaften sein, müssen neue Strukturen, Materialien und Verfahren eingesetzt werden (Prinz 2011, Busche 2014). Bei Neukonstruktionen ist der Anteil unbekannter Auswirkungen noch höher (Ehrlenspiel 2009). ..."
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Ullah, Naseem. "Disease modules identification in heterogenous diseases with WGCNA method." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-16692.
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The widely collected and analyzed genetic data help in understanding the underlying mechanisms of heterogeneous diseases. Cellular components interact in a network fashion where genes are nodes and edges are the interactions. The failure in individual genes lead to dys-regulation of sub-groups of genes which causes a disease phenotype, and this dys-functional region is called a disease module. Disease module identification in complex diseases such as asthma and cancer is a huge challenge. Despite the development of numerous sophisticated methods there is a still no gold standard. In this study we apply different parameter settings to test the performance of a widely used method for disease module detection in multi-omics data called Weighted Gene Co-expression Network Analysis (WGCNA). A systematic approach is used to identify disease modules in asthma and arthritis diseases. The accuracy of obtained modules is validated by a pathway scoring algorithm (PASCAL) and GWAS SNP enrichment. Our results differ between the tested data sets and therefore we cannot conclude with recommendations for an optimal setting that could perform best for multiple data sets using this method.
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Bruno, Mattia. "The energy scale of the 3-flavour Lambda parameter." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17516.
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Alle dimensionsbehafteten Gitter-QCD-Observablen muessen in Einheiten einer Referenzskala ausgedrueckt werden und die Bestimmung dieser ist haeufig der erste Schritt in der Berechnung anderer Observablen. In dieser Arbeit beschreiben wir eine scale setting-Strategie fuer eine neue Satz an Ensembles mit großem Volumen, die von CLS generiert worden sind. Die Simulationen enthalten up, down und strange O(a)-verbesserte Wilson-Fermionenfelder. Die Eichfeld-dynamik ist mit Luescher-Weisz-Wirkung implementiert. Um das freezing der Topologie bei kleinen Gitterabstaenden zu ueberwinden, wurden offene Randbedingungen in Zeitrichtung verwendet. Außerdem wurde twisted mass reweighting eingesetzt, eine Technik, um die Fermionbeitraege in der Infrarotregion zu stabilisieren und zu regularisieren. In dieser Arbeit diskutieren wir deren Auswirkungen auf mesonische Spektralgroeßen. Wir berechnen die Gitterabstaende fuer unsere vier β Werte unter Verwendung der pseudoskalaren Zerfallskonstanten, die wir aus den Simulationen mit offenen Randbedingungen extrahieren. Außerdem bestimmen wir die Observable t0 und extrapolieren sie zum Kontinuum.In lattice computations all dimensionful observables have to be expressed in units of a reference scale and its determination is often the first step before proceeding to other quantities. In this thesis we describe the scale setting strategy for a new set of large-volume ensembles generated within the CLS effort. The simulations have been carried out including up, down and strange quark fields, discretized a là Wilson and following the O(a)-improvement program. The gauge field dynamics is implemented with the improved Luescher-Weisz action. To overcome the freezing of topology in simulations at small lattice spacings, open boundary conditions in the time direction have been adopted, together with twisted-mass reweighting, a technique to regularize and stabilize the fermionic contributions in the infrared region. In this thesis we discuss their implications on mesonic spectral quantities. We compute the lattice spacings, for our four values of β, using the pseudo-scalar decay constants, extracted in the presence of open boundary conditions. In addition to that, we determine the observable t0 and extrapolate it to the continuum.
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Flärdh, Oscar, and Manne Gustafson. "Mean Value Modelling of a Diesel Engine with Turbo Compound." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1777.
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Over the last years, the emission and on board diagnostics legislations for heavy duty trucks are getting more and more strict. An accurate engine model that is possible to execute in the engine control system enables both better diagnosis and lowered emissions by better control strategies.
The objective of this thesis is to extend an existing mean value diesel engine model, to include turbo compound. The model should be physical, accurate, modular and it should be possible to execute in real time. The calibration procedure should be systematic, with some degree of automatization.
Four different turbo compound models have been evaluated and two models were selected for further evaluation by integration with the existing model. The extended model showed to be quite insensitive to small errors in the compound turbine speed and hence, the small difference in accuracy of the tested models did not affect the other output signals significantly. The extended models had better accuracy and could be executed with longer step length than the existing model, despite that more complexity were added to the model. For example, the mean error of the intake manifold pressure at mixed driving was approximately 3.0%, compared to 5.8% for the existing model. The reasons for the improvements are probably the good performance of the added submodels and the systematic and partly automatized calibration procedure including optimization.
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Isaksson, Jenny. "Slag Cleaning of a Reduced Iron Silicate Slag by Settling : Influence of Process Parameters and Slag Modification on Copper Content." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-84798.
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During the pyrometallurgical extraction of copper, a significant part of the copper is lost with discard slag, which decreases profits, overall copper recovery, and efficiency of raw material usage. Smelting furnace slag usually has a copper content that is close to or higher than that of copper ores. The investigation of copper losses to slag is thus a task of practical significance, as the ore grades are depleting. Slag cleaning, e.g., a settling furnace, can reduce copper losses to slag as the mechanically suspended copper-containing droplets separate from slag under the action of gravity and can hence be recovered. An industrial trial was conducted in an electric settling furnace with slag originating from an electric smelting furnace and processed in a zinc fuming furnace. The trial was conducted to increase the understanding of copper losses to slag and how the process parameters temperature and settling time influence the slag copper content. The obtained slag samples were also evaluated to gain better insights as to the settling mechanism and, if any, factors that hinder the copper phases from settling. Slag modification with CaO was also evaluated to investigate how the modification influences the settling of copper phases and, thus, the final slag copper content. Samples collected during the industrial trial were the basis for the evaluation in the current work. The samples came from batches with varying temperatures, settling times, and CaO content collected at four different sample positions. Instrumental techniques, including XRF, FAAS, ICP-SFMS, and SEM-EDS, were used to analyze the chemical compositions of the samples and the appearance of copper and associated phases. The results indicated that the copper content of outgoing slag increased with increasing temperature in the evaluated interval. The copper content was also concluded to be more strongly affected by the temperature compared to the settling time. Regulating the temperature to the lower temperature interval in the settling furnace could thus decrease the final slag copper content. During the slag characterization, it was found that suspended copper-containing phases were hindered from settling, due to the attachment to solid phases and gas bubbles in the slag. By controlling and minimizing the presence of the bottom buildup and thus solid phases in the slag, the copper content can be decreased. The results indicated that the CaO slag modification decreased the final slag copper content, and can thus be used as a modifier for increased settling.
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SU, Hong Zoon, and 蘇鴻潤. "Parameters Setting in Simulated Annealing." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/60434042122099829173.
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碩士國立台灣工業技術學院
機械工程技術研究所
85
This thesis aims to study the effect of varied parameter setting in simulated annealing. These simulated annealing con- trol parameters comprise starting temperature, ending tempera- ture, temperature dropping pattern, maximum design changes and the decteasing pattern of maximum design change. The probability formula for the design change wuth an increased energy level is also studied. Formal statistical theory is used to derive the maximum traveling range under a given set of control paremeters. Based on anumber of control parameter settings, two types of for- mulas wstimating the average maximum traveling range, that is a function of two parameters, maximum design change and maximum iteration number, is developed. these estimation formulas ars examined in a number of illustrative problems.
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LE, DOAN-THANH, and 黎允青. "Parameters Setting of Selective Laser Melting Machine." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5r5p7f.
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碩士國立中正大學
機械工程系研究所
106
Additive Manufacturing (AM) or Selective Laser Melting (SLM), in particular, has been used in industries in a wide number of applications since the 1980s. It has become common in various manufacturing process ranging from car engine, ship, building constructions, etc. In AM applications, achieving better accuracy and surface roughness is the main criterion. Questions concerning of Tongtai Machine & Tool Co., Ltd is to archive a better performance by optimal process parameters. Based on their expectations, the relationship of process parameters and system parameters, the optical distortion in Scanner Head Control were investigated both mathematically and experimentally . Following the provided result of this work, the operation engineer will be able to understand the root of systems dynamic and speed up the setting Delays parameters in the Scanner Head Control with time efficiency.
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Wei-Chieh, Shih, and 施緯杰. "Auto-Setting of CAN Bit Timing Parameters." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/88347781154095707792.
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碩士國立彰化師範大學
車輛科技研究所
104
CAN bus is widely used in industry due to its simplicity, high reliability and easy expansion characteristics. However, each node’s bit timing parameters, propagation length and oscillator tolerance on the bus will interrelate, and it becomes a great obstacle for the user. The purpose of this paper is to determine the optimal configuration of bit timing parameters in the condition of longest propagation length. We describe the physical meaning of CAN bus bit timing parameters, the rules and procedures of bit timing parameters configuration, and cite a specific example of CAN bit timing parameters configuration. Further more, we use the NUC140 learning board which Nuvoton has developed, to write a program that allows the CAN node to configure the optimal timing parameters automatically with only entering the oscillator frequency and bit rate. Also we connect different length between the nodes to verify that the method is feasible.
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Lin, Yu-Kuang, and 林育光. "Parameters Setting Model for Project Performance Control Systems." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/sxf925.
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碩士國立臺灣科技大學
營建工程系
95
This study proposes a Parameters Setting Model for Performance Control Systems (PSM) to speed up the time that the general performance control systems need to set parameters. Using this model, not only human judgments involved in parameters setting can be reduced but also time can be saved for project managers to deal with and to solve problems. The PSM is able to provide a list of sources of parameters, so that users can refer to this list to set up parameters. The PSM also can extract the conditions of “work content” and “work environment” factors from productivity data and classify the data by combination factor conditions. In additional, it provides an information on affect in productivity of “work environment” factors. Hence, users can base on this information to set up the factor weight. Through the case studies, the productivity and factor weight obtained from the PSM are consistent with the research hypothesis and activity characteristics. This verifies that the PSM is rationale and feasible.
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Juang, Wang Sheng, and 莊旺昇. "Setting of Sampling Period and Parameters for PID Controller." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/55387597541218224283.
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碩士逢甲大學
自動控制工程研究所
81
PID控制器目前在程序工業中仍然被廣泛地使用，主要是因為PID只有三個 調諧參數；早期有關PID調諧法則有很多，但大多只適合Ｓ領域，因此， 本研究以PID控制器調諧為基礎，在Ｚ領域之下對一階帶有時延之程序作 調諧。首先對系統作正規化(Normalize)分析，以數值搜尋法搜尋出最適 調諧參數群，進而應用最小平方迴歸法迴歸出一套PID控制器調諧參數之 調諧公式。本研究分別使用連續式PID控制器及數位式PID控制器作為調諧 控制器；在數位式PID控制中，重要參數之一的取樣週期；本研究也應用 迴歸分析迴歸出最適取樣週期與程序參數間之關係式。由於一般Ｚ轉換對 於程序延遲時間與程序時間常數之間非整數倍關係時，無法作正確的轉換 ，因此，研究中採用修正型Ｚ轉換，以克服延遲時間與取樣時間非整數倍 關係之問題。在連續系統中，本研究直接對串級控制系統作調諧。在串級 控制系統中，若使用傳統調三個參數之PID控制器為調諧控制器，則必須 同時調六個參數；本研究以OPT作為調諧控制器，只須同時調兩個參數， 調諧過程比較節省數值搜尋所須之時間。同樣的，本研究也應用最小平方 迴歸法迴歸出一套有關連續式PID控制器之串級控制調諧公式。本研究所 列之調諧公式適合作PID控制之用，尤其在單環路控制系統中，一并提供 取樣週期之計算公式；免除了傳統憑經驗選定取樣週期之困擾。
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Hui-ChiehLin and 林暉傑. "The optimal setting of process parameters for screen printing." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/11221952111926848859.
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碩士國立成功大學
工業與資訊管理學系專班
100
Solar industry is one kind of alternative energy industries in the past years. Due to expectedly lucrative benefit, many corporations have made an investment in this industry. Unfortunately, the rapid expansion of production leads to oversupply. At the end of the third quarter of 2011, the global demand of solar cell is 20GW (Giga Watt), but the supply has been more than 60GW. Oversupply situation makes corporations facing financial structure. The serious oversupply problem forces corporations to review and rebuild their financial structure. As a result, some corporations choose to quit solar industry. How to reduce costs effectively without affecting the conversion efficiency is the topic at this moment of the various companies. The greatest cost in solar cell comes from the raw material of silicon prices, but the prices of silicon depend on market supply and demand, which we cannot control. The secondly high cost in solar cell manufacturing is conductive paste (Paste). The cost of conductive paste is more than 10% in the overall cost of manufacturing. It means that reducing the usage of conductive paste under the same conversion efficiency not only can decrease the production costs effectively, but also is the good way to survive in the slump year. In the past years, experiments were done by One-factor-at-a-time or the rule of thumb, and the results are not reliable. In this study, we used the experimental design and response surface methodology to identify the optimal combination of parameters of the solar cell process and construct the empirical model. The results through systematic experiments are more reliable to be referred to and used, and it also shows that we can achieve the same conversion efficiency using the minimum usage amount of conductive paste. We can also fit the empirical model to any new product, and reduce the amount of conductive paste in a short time. Through the results of this study, companies can effectively reduce the costs and be more competitive in a downturn of solar energy.
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HUANG, YING-HUA, and 黃英華. "Research on parameters setting of variable structure control system." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/75430365840139115290.
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Lai, Yi-Chieh, and 賴怡潔. "Using OCBA for Better Parameters Setting in Meta-Heuristic Algorithms." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/55970769548744380763.
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碩士元智大學
工業工程與管理學系
98
Meta-heuristic algorithms have been widely used for combinatorial optimization problem, but how to set optimal parameters for those algorithms is still an open and important issue. In order to determine better parameters setting for the meta-heuristic algorithms, this thesis presents a black box approach based on Optimal Computing Budget Allocation (OCBA). Simulation results show that the black box approach can determine better parameters setting in an easier and more efficient way, which significantly reduce the burden for the meta-heuristic users in setting necessary parameters to achieve better performance.
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Lin, Chen-Yen, and 林承曄. "STUDY AND IMPLEMENTATION OF REVERBERATION PARAMETERS VALUE SETTING FOR TEMPOS." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/j5988b.
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碩士大同大學
通訊工程研究所
106
The purpose of this thesis is dedicated to propose a reverberation module algorithm according to the reverberation theorem and designs a mathematics expression in response to this algorithm, then analyze mathematics expression which has been proved as a stable system. In order to implement the digital signal process (DSP) develpment platformeasier, this thesis have proposed a method to reduce infinite impulse response (IIR) into finite impulse response (FIR) by using the characterization of the reverberation time (T60). Develops the program in C language according to the reverberation algorithm, implements this reverberation module on DSP develpment platform and translates the origin audio signal without reverberation effec to audio signal with reverberation effect. This thesis explore the reverberation parameters value setting on different tempos, which contain questionnaire survey procedure and analyze the result of experience. Finally, a better set of reverberation parameters value setting is obtained, which can make the reverberation effect approaching to natural space effect. Simultaneously, the relationship of a linear equation between tempo and popular reverberation time is obtained, means that given the tempo, then respond to the reverberation time value is determined by use this relationship of two.
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Chung-LuLu and 呂瓊茹. "Experiment Design for Parameters Setting in TFT Substrate Clean Process." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/47995978586676896288.
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碩士國立成功大學
工業與資訊管理學系碩士在職專班
104
This study aims to identify the key factors to ensure the stability of the detergent concentration in the TFT-LCD substrate cleaning process. The 2k-p fractional factorial experiment is subsequently conducted to investigate the five factors, which are the pump frequency, pump stroke length and three timing points of providing detergent (T1, T2, and T3) in the substrate cleaning process. The ANOVA results show that the three factors are significant in controlling detergent concentration and concentration variation between the pump frequency and timing points of providing detergent in washer tanks 1 and 2. The results show that the pump frequency and timing points of providing detergent in washer tanks 1 and 2 in the low level would ensure the stability of the detergent concentration and the consumption amount would also decrease. The implications of the detergent concentration with pump and timing points of providing detergent in washer tanks are also discussed.
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Yan-LongPan and 潘彥龍. "Optimal parameters setting of flexible strategy testing for subgroup analysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/12220090372719435388.
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碩士國立成功大學
統計學系
102
Targeted therapy can more precisely identify and attack cancer cells or inhibit important molecular signaling pathway, usually while doing little damage to normal cells and achieving treatment goals. This new treatment regimen has been successfully applied to a number of cancers. However, some studies indicate that targeted therapy has a significant effect only for special groups of patients. It carries out that not only the efficacy of overall population but also that of subgroup analysis is an important issue in targeted therapy clinical trials. In order to reduce the threshold to enter the subgroup analysis, Alosh and Huque (2009) proposed a flexible strategy for testing subgroups and overall population. This strategy introduces new parameters to improve the power of subgroup test effectively while the familywise Type I error rate is controlled. It brings out an open question that whether there exist any optimal parameter settings for a given alternative hypothesis. In this thesis, first, we will discuss the influence of power of overall population test and subgroup test in flexible strategy testing. Second, we develop two criteria in the concept of loss less than obtainment (means the increases of power of subgroup test is less than the decreases of power of overall population test) as a starting point: (1) the maximization of power for subgroup test, and (2) the maximization of power for overall population test and subgroup test. Finally, we provide some results for two criteria.
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Huang, Yung-Ming, and 黃永銘. "Microgear Injection Molding Assisted with the Robust Process Parameters Setting Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/72798t.
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碩士國立高雄第一科技大學
機械與自動化工程所
96
Micro-injection molding, with advantage of mass-production capability and low cost, is one of key technology in producing precision-molded components. Unfortunately, a low yield rate of high quality is frequently observed due to its problems with size and shape precision, warpage, molecular orientation, and optical properties. The solution to the problems mentioned above is involved in machine consideration, molding design, and process parameters setting. However, robustness performance for the parameters, even the optimal combination, remains less attainable when an alternation to parameters occurs with change in the environment where the machine has been running for a long while. Therefore, the purpose of the study is to search a setting point through Robust Process Parameters Setting Method which focuses on multiple quality characteristics, in the hope that the process parameter is able to endure change in the environment and to obtain the optimization for multiple responses and the yield rate. Gears with 6 mm outside diameter and 4 mm outside diameter are applied in this study and the mold insert is made by LIGA-Like process. The first phase is concerned with the analysis of two single quality characteristics, including the error of outside diameter and the error of tooth thickness by Taguchi method. The second phase is to find a quality indicator interprets multiple response problems exactly by PCA, WPC, or DF method. The final phase is to search a robust parameter setting point by Robust Process Parameters Setting Method and confirmed by experiment. The results show that in first phase, the effects of parameters on single quality characteristic for 6 mm gear are similar to 4 mm gear. The important factors for outside diameter are mold temperature, injection speed, and back pressure. In addition, factors for tooth thickness include holding pressure, cooling time, and mold temperature. The results of second phase indicate that mold temperature, holding pressure, and injection speed give significant effects to multiple quality characteristics for 6 mm gear. Nevertheless mold temperature, holding pressure, and cooling time are for 4 mm gear. Finally, the results for Robust Process Parameters Setting Method show that compared with the initial point, yield rate of 6 mm gear produced in robust setting point searched by the method increased from 10% to 91%. As for 4 mm gear, yield rate increased from 38% to 93%.
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李翊僑. "Optimization of process parameters setting research -A case study of lognormal distribution." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/gtatjv.
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碩士國立新竹教育大學
應用數學系碩士班
103
Optimum process parameters in the production process to set certain conditions to understand margin products, is one of the most important ring; each quality characteristics are an ideal target, in Chang et.al (2009) article, we discuss a condition characterized by the quality of "bigger is better", the optimal solution still exist on this paper to facilitate the multivariate normal distribution of the number of quality characteristics of the basic assumptions.
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LIU, CHE-MING, and 劉哲銘. "Research of Crystal Growth of Large-scale Sapphire and Setting of Temperature Parameters." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7a2r8t.
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碩士明新科技大學
工業工程與管理系碩士在職專班
106
Yield rate of small and medium size sapphire crystal, 25-30 kg class, becomes stable in Taiwan. However, large-scale touch panel (such as mobile phones greater than 4.7 inches), cutting from small size sapphire crystal will be greatly reduced in utilization. The large-scale sapphire can definitely improve the utilization rate, and also can be drilled out for 2-inch, 4-inch, 6-inch, crystal tiles (high-end panels). This paper studies the contemporary crystal growth technology of large-scale sapphire, and applies the Thermal Technology LLC (USA) machine with Kyropoulos Method to investigate the appropriate process temperature for a large sapphire, 80-kg grade, to improve the yield in an efficient way. The research method includes five steps: 1. Analyze the cause of the problem; 2. Use the experimental design; 3. Analyze the experimental results; 4. Determine the process parameters; and 5. Perform the improvement actions. The main idea to optimize the crystal growing process goes through analyzing the reasons for the failure and applying experimental design to setting the temperature parameters. The result demonstrates the reduction of common defects of large-scale sapphire and the utilization of crystal ball.
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Fan, Guo-Wei, and 范國瑋. "Dynamic Simulation and Analysis for 1D Extension Forming and Optimization of Parameters Setting." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/pkpr4s.
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碩士國立臺灣科技大學
機械工程系
94
This research is aimed to develop a computer code that can provide the user a test setting and eventually advance to an optimal parameters setup for a 1D extension system. Via deriving the equations of motion for an extension system, a computer program was developed for test run. The user only needs to provide the system configuration and material parameters, and the program will output the tension and stress distribution as the first check up. A tension analysis follows to give the user an initial outline of extension setup. Modifications hence can be proceeded if necessary. The processing of Aluminium and PVA extension forming were illustrated as examples. Various different object functions and optimal criteria were then demonstrated accordingly. To obtain the optimal parameters, the Genetic Algorithm method was employed. This computer code is well developed and proven and it is believed to provide both the analysis and design engineers a useful tool for setting the extension process.
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Wang, An-Peng, and 王安平. "The Appliations of Nonlinear Programming Procedures in Control System Parameters Setting and Tuning." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/16254907659925139625.
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碩士國立交通大學
控制工程系
84
A good setting of the control parameters leads to satisfactory systemperformance . However, in physical systems, due to the uncertainty of the system models, it is difficult to set and tune proper control parameters.Therefore, a systematic and effective parameter tuning approach is of greatimportance in real control applications. In this thesis, four new PID initial setting approaches are developed. Then, the nonlinear programming technique is applied to the present research to tune the parameters to optimize system performance. The main design specifications and limitations for a control system such as rise time,steady state error, etc. are quantified. The objective cost function canbe determined from the design requirements and optimization process can therefore be performed in the constrained domain of the simulated targetplant. In addition to the analysis and simulation, a servo motor control experiment is set up so that the present design can be verified. By considering the model uncertainty and external noise, we further combine the initial optimization and the on-line optimization to construct a two-stage parameter setting and tuning process. Experiment results indicatethat the control system performance can achieve significant improvement via the proposed optimization process.
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CHEN, JIA-JUN, and 陳加鈞. "Interactive Decision Making in Multiple Objective Programming for Parameters Setting of Turing Process." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/55938704390415115752.
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碩士明志科技大學
工業工程與管理系碩士班
105
Cutting parameters are the most important control factors in turning process, and the optimal cutting parameters setting can be formulated as a multiple objective geometric programming problem. In this research, by taking logarithmic transformation to all the variables and parameters, firstly we translate the multiple objective geometric programming model to the multiple objective linear programming (MOLP) model. Secondly, we analyze the Pareto optimal solution set for all possible given parameters, then conclude that there are only four kinds of Pareto optimal set in this model. We develop an algorithm for finding the most proper Pareto optimal solution under the preference of the decision maker by interactive process. Finally, we complete the coding for the proposed algorithm using C language, and prove that the program is accurate by real world parameters setting of turning process testing.
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Chang, Feng-Cheng, and 張豐程. "A Study on Optimal Parameters Setting of Wire Bonding Quality in IC Assembly." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/21822218100281487830.
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碩士國立高雄第一科技大學
機械與自動化工程所
91
In this thesis, we investigate and optimize the parameters setting of TFBGA (Thing Film Ball Grid Array) wire bonding process in IC industry. Two important inspection methods, ball-shear force test and wire pull test, are used as the quality index of wire bonding process of TFBGA. The purpose of these two inspection methods is to insure the stability of die, gold wire, capillary and substrate. A series of respond surface method based experiments were carried out to analyze the effects of process parameters to the values of ball-shear force and wire pull tests. The results provide a lot of valuable information for new process parameters design of IC TFBGA. The results show in 3D responding surface diagram. It reveals that the bond force TFGBA does not much affect the ball-shear force and wire pull value; the curve of bond power is 2nd order. It implies that the bond power can not be too high or too low. It also shows that the deformation of wire ball is very important.
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Chang, Fong-Chia, and 張峯嘉. "Using Design of Experiments to Determine the Optimal Parameters Setting for Photovoltaic Conductor Paste." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/7qwzhc.
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碩士國立交通大學
管理學院工業工程與管理學程
105
Photovoltaic conductor paste is mainly used for materials which affects screen printing process of solar cells. It is one of the key conversion efficiency of the solar cell. Therefore, improving the printability of the photovoltaic conductor paste to achieve fine line printing for reducing the effect of shade on the surface of the battery, while maintaining excellent electrical conductivity to boost efficiency, has become a very important issue. By gradually increased the demand for fine line printing, the photovoltaic conductor paste with poor printing quality will accompany with broken line. Therefore, reducing the printing speed to avoid disconnection status become an important issue. Design of Experiment (DOE) and Response Surface Method (RSM) are utilized in this study to improve photovoltaic conductor paste printability by finding the optimal combination of manufacture process parameters for the photovoltaic conductor paste process.
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Wang, Cheng-Fang, and 汪承芳. "Using OCBA for Setting Better Production System Parameters ─ an Example in Flexsim Simulation Program." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/634c34.
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碩士元智大學
工業工程與管理學系
106
This thesis describes that set better production system parameters by using Optimal Computing Budget Allocation (OCBA). Besides, we build simulation models combining OCBA algorithm and achieve the better result through the software Flexsim. Generally, a better simulation model can be found in many different simulation models by traditional method, but it needs too much time and many simulation times. Therefore, we solve this problem by using OCBA algorithm. By OCBA, we distribute the different design schemes in batches, and find several preferred design schemes. It not only enable decision makers to determine several preferred designs within finite simulations, but also verify the effects achieved by their associated simulation parameters. Finally, we prove that OCBA is better than traditional method by simulating in Flexsim.
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Chiu, Chui-Feng, and 邱垂峰. "The effect of air circulation mode setting inenvironmental control parameters of mushroom cultivation rooms." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/6j448c.
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碩士國立臺北科技大學
能源與冷凍空調工程系碩士班
96
This object of the research is to analyze mushroom cultivation room environment control status in different returning air flow modes by measuring environmental condition parameters and demonstrate measured parameters into 3-D graphics with Tecpolt software. The analysis can determine the effect of cultivation room environmental control and be reference of system performance improvement.The major environmental parameters include dry bulb temperature, wet bulb temperature, carbon dioxide concentration, air flow speed, lighting illumination. The measuring locations are marked in X, Y, and Z axis and refer to mushroom shelves location in order to collect actual environmental parameter in mushroom cultivation rooms. The mushroom cultivation rooms install heat insulation board to resist heat load and interdict indoor cool air releasing to outdoor. The cool air is delivered from bottom to top and absorbs exhale heat from mushrooms. To maintain high humid condition, applies twin flow nozzle humidification. Because of the character of the gas, the concentration of carbon dioxide is higher at lower level. In order to achieve actual environmental control of mushroom cultivation room and reduce labor cost of managing mushroom cultivation rooms, computerized automatic control should be apply. After analyzing measuring data, the twin side returning air flow mode is the best air circulation for mushroom cultivation room because the mode is the closest to setting condition and most suitable for cultivation.
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Trimble, Sheena Tiami. "Setting the parameters for social movements : students, workers, and the South Korean development model." Thesis, 1991. http://hdl.handle.net/2429/1905.
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This thesis attempts to explain social movements--why the occur and why they assume their specific characters--in terms of the way a society is structured. Using premises drawn from theoretical literature on late capitalism and contemporary social movements, one is directed to look for contradictions in sociopolitical structures for the source of conflict and social movements. When social groups experience these they may engage in collective action or protest movements. It is possible, however, that they may not be fully aware of these contradictions or strongly motivated by them. "Dominant" social groups may take steps to ensure that conflict does not emerge by masking disparities or by suppressing defiant groups.
Where the state intervenes heavily in society and economy, as in late capitalist societies, unique contradictions are created which may inspire social conflict. However, the state is also in a unique position to "legitimate" its intervention and the existing sociopolitical configuration. The state will be most concerned with preventing movements that pose the greatest threat to the prevailing social structure. Social contradictions and the efforts of dominant groups and state to temper their impact produce a series of inducements and constraints to collective action.
Although South Korea is not in the stage of late capitalism, parallels exist and it is possible to use this theoretical framework to explain the difference between the student and labour movements in that country. The features of the Korean model of development--an interventionist developmental state, an emphasis on economic development and neglect of social and political, nurturing of monopoly capital, popular exclusion from the policy-making process and fast-paced industrialization--produce a particular set of motivations and barriers to collective action. Because workers and students do not experience these in the same way, their respective social movements differ in shape and level of activity.
Workers are essential to the development process and thus are subject to more constraints to protest activity in the form of developmental rhetoric and even outright repression. State and business expend greater efforts to ensure that they are 'incorporated' into the model. University students are particularly well-placed to see the contradictions of the model and are less inclined to accept state attempts to legitimize its character. Because students are not as essential to the development process, they are not faced with the same repressive measures. Nevertheless, their ability to influence the middle and working classes forces the state to respond to their protest. Students are not as regimented in their time and environment as industrial workers which affords them more space for protest activity. Middle class sympathy for their cause has also helped to shield them from the state's negative sanctions.
As the Korean development model has undergone restructuring since the mid-1980s, the student and labour movements have adapted accordingly. Workers have grown in power, while political reform has undercut the students' protest platform. Yet many of the former structures remain in tact; they were remodelled just enough to accommodate growing pluralism in society. The future of these two movements remains in question as they await further reform or government retrenchment.
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Chen, Han-po, and 陳翰柏. "A Study on Auto Setting of Optimal Control Parameters for Ulcer Preventing Air Mattress." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/24497534312357304644.
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碩士大同大學
機械工程學系(所)
97
In recent years, inflatable supports have come into extensive use and widely in hospital and nursing home for prevent and treat decubitus ulcers, commonly known as bed sores. The bed sore often result from the pressure applied to certain portions of the skin of a bedridden patient. These pressure points typically occur in the area of a bony protuberance which results in cut-off of the blood flow in skin and soft tissue. When the blood flow in the capillaries is blocked due to excessive external interface pressure, the cells in that area begin to die and may result a wound. To avoid the long time pressure applied in the same points for immobile persons. Alternating pressure pads are often used. However, the internal pressure of pads is one of the significant factors of adjusting the pressure between body and air mattress. Currently, most of commercial products are using patient weight to set the internal pressure of pads. The aim of this project is to study the relations between internal pressure and interface pressure. According to the study result, we like to develop an algorism for control the internal pressure. Since the pads are made by soft fabrics, the internal pressure is hard to measure precisely and easy to disturb by the motion of patient. Thus, we want to study a method to measure internal pressure accuracy. By precise measuring and controlling the internal pressure, the patient interface pressure can be provided comfortably and preventing the ulcer.