Dissertations / Theses on the topic 'Characteristics and processes'
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Domann, Michael. "Characteristics of spray unsteadiness." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268873.
Full textDimier, Celine. "Photoacclimation processes and ecological characteristics of phytoplankton." Thesis, Open University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437316.
Full textLau, Sze Chun Gary. "Physical characteristics of flocs in water treatment processes." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444945/.
Full textBrady, Marian. "Discourse characteristics following right hemisphere stroke." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248294.
Full textRoos, Johan. "Cooperative venture formation processes : characteristics and impact on performance." Doctoral thesis, Handelshögskolan i Stockholm, Institute of International Business (IIB), 1989. http://urn.kb.se/resolve?urn=urn:nbn:se:hhs:diva-1793.
Full textLi, Lixia. "Investigation on fabrication processes and characteristics of BiSrCaCuO films." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40175.
Full textThe onset critical temperature for the superconducting films was between 86 and 118 K and the zero critical temperature was between 77 and 106 K. These critical temperatures are the highest ones obtained so far for BiSrCaCuO films prepared by the CO$ sb2$ laser ablation technique. The critical current density of the films was in the range of $10 sp2 sim 10 sp3$ A/cm$ sp2$. The films were found to contain 2212 and 2223 superconducting phases, with a dominant 2223 phase. The composition was uniform along the films and the average ratio was close to that for the standard 110 K high-T$ sb{ rm c}$ phase.
The noise of the BiSrCaCuO films in normal state was inversely proportional to frequency and was at least 5 orders of magnitude larger than the noise of typical metals. In the superconducting state, the films showed a noise peak in the tail region of the superconducting transition. This noise peak also showed a 1/f variation at intermediate frequencies. The noise peak was maximum at a given current, and decreased with an increase in the external magnetic field. It is believed that this noise peak was caused by the vortex motion.
Three peaks were observed in microwave-induced voltage versus temperature curves (microwave frequency = 10.28 GHz) for the BiSrCaCuO superconducting films. One of the peaks occurred at the midpoint of the superconducting transition, which was due to a bolometric effect. The other two peaks occurred at temperatures near the tail region of the transition and these were caused by a non-bolometric effect.
Kwalik, Kristina Mary. "Bifurcation characteristics in closed-loop polymerization reactors." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/11711.
Full textXiong, Junlin. "Synthesis of dynamic systems with Markovian characteristics." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38979330.
Full textXiong, Junlin, and 熊軍林. "Synthesis of dynamic systems with Markovian characteristics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38979330.
Full textNanayakkara, Julian F. "Effects of operating characteristics on work-in-progress in batch manufacturing systems." Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482967.
Full textSpiess, Malte [Verfasser]. "Characteristics of Poisson cylinder processes and their estimation / Malte Spiess." Ulm : Universität Ulm. Fakultät für Mathematik und Wirtschaftswissenschaften, 2012. http://d-nb.info/1024534057/34.
Full textAnokye-Siribor, Kwame. "An analytical model for pressbrake forming using in-process identification of aerospace material characteristics." Thesis, University of Ulster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298630.
Full textPeter-Jaarsveld, Saskia. "Creative cognition : characteristics of products and processes in visual design tasks." Thesis, University of Sunderland, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433927.
Full textOguchi-Chen, Fumiko. "Characteristics of thought processes and knowledge structures of Novice tennis players." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28770.
Full textEducation, Faculty of
Curriculum and Pedagogy (EDCP), Department of
Graduate
Ratitch, Bohdana. "On characteristics of Markov decision processes and reinforcement learning in large domains." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85641.
Full textIn the first part of this thesis, we investigate properties of reinforcement learning tasks that influence the performance of value-based algorithms. We present five domain-independent quantitative attributes that can be used to measure various task characteristics. We study the effect of these characteristics on learning and how they can be used for improving the efficiency of existing algorithms. In particular, we develop one application that uses measurements of the proposed attributes for improving exploration (the process by which the agent gathers experience for learning good behavior strategies).
In large realistic domains, function approximation methods have to be incorporated into reinforcement learning algorithms. The second part of this thesis is devoted to the use of a function approximation model based on Sparse Distributed Memories (SDMs) in approximate value-based methods. Like for all other function approximators, the success of using SDMs in reinforcement learning depends, to a large extent, on a good choice of the structure of the approximator. We propose a new technique for automatically selecting certain structural parameters of the SDM model on-line based on training data. Our algorithm takes into account the interaction of function approximation with reinforcement learning algorithms and avoids some of the difficulties faced by other methods from the existing literature. In our experiments, this method provides very good performance and is computationally efficient.
Oliva, Anthony Michael. "Odor representation in the brain : insights into activity and sex-dependent processes /." Connect to full text via ProQuest. Limited to UCD Anschutz Medical Campus, 2007.
Find full textTypescript. Includes bibliographical references (leaves 124-137). Free to UCD affiliates. Online version available via ProQuest Digital Dissertations;
Rodríguez, Cortés Francisco Javier. "Modelling, Estimation and Applications of Second-Order Spatio-Temporal Characteristics of Point Processes." Doctoral thesis, Universitat Jaume I, 2014. http://hdl.handle.net/10803/394025.
Full textThis thesis is mainly focused on developing properties and estimators for second-order characteristics of spatio-temporal point processes. First, we present a theoretical framework of spatial and spatio-temporal point processes. The rest of the thesis is organized as follows. In Chapter 2 we present a new family of optimal and positive kernels an alternative unbiased estimator for the product density function. Its performance is compare under several kernel through MISE. In Chapter 3 a new kernel estimator of spatio-temporal product density function are given and also are developed close expressions for the variance under the Poisson case. En el capítulo 4 nos centramos en los métodos de orientación de segundo orden que proporcionan una herramienta natural para el análisis de los datos de proceso Punto espaciales anisótropas. Finally, we provide a general description of the currently ongoing research projects which have emerged motivated by the close relationship with the second-order properties.
Alves, Kyle Vierra. "What are the delivery system design characteristics of information-centric mass claims processes?" Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/32564.
Full textOttosson, Anton, and Viktor Karlstrand. "Gaussian Process Methods for Estimating Radio Channel Characteristics." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289449.
Full textGaussiska processer (Gaussian processes,GPs) har länge använts för Bayesiansk regression. Då de visat sigfördelaktiga för gles och brusig data utforskar vi möjligheternaför GP-regression (Gaussian process regression, GPR) som ettverktyg för att estimera egenskaper hos radiokanaler.Isynnerhetbetraktasskattningaventidsvarierandeöverföringsfunktion utifrån diskreta samplingar. Vi presenterarden grundläggande teorin kring GPR, och använder både GPRoch dess djupinlärningsmotsvarighet DGPR (deep Gaussian pro-cess regression) för skattning. Båda ger goda resultat, även när samplingarna är få. Utöver detta så relaterar vi koherens-bandbredden hos en radiokanal till en hyperparameter i GPR-modellen. Resultaten visar på en tendens till proportionalitet,vilket antyder att vår metod kan användas som ett alternativt sätt att approximera koherensbandbredden.
Kandidatexjobb i elektroteknik 2020, KTH, Stockholm
Nazarinezhad, Giashi Abolhasan. "Modeling and Simulation of High Dynamic Processes for Laminated Composite Materials with Nonlinear Characteristics." Doctoral thesis, SIG Combibloc System GmbH, 2019. https://tud.qucosa.de/id/qucosa%3A36880.
Full textThambidorai, Ganesh. "Multiresponse Optimization Methodology Considering Related Quality Characteristics." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29174.
Full textTyutyunova, Ksenia. "CEO turnover in post-acquisition integration processes: Impact of individual characteristics and cross-border factor." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-123950.
Full textHsieh, Men-Chi Ravigururajan T. S. "Plaque behavior characteristics and regrowth of plaque in diseased arteries tissue during post-cryoplasty processes." Diss., Click here for available full-text of this thesis, 2006. http://library.wichita.edu/digitallibrary/etd/2006/t058.pdf.
Full text"May 2006." Title from PDF title page (viewed on October 31, 2006). Thesis adviser: T. S. Ravigururajan. Includes bibliographic references (leaves 89-95).
Dutta, Partha Schneegurt Mark A. "Plaque behavior characteristics and regrowth of plaque in diseased arteries tissue during post-cryoplasty processes." Diss., Click here for available full-text of this thesis, 2006. http://library.wichita.edu/digitallibrary/etd/2006/t059.pdf.
Full text"May 2006." Title from PDF title page (viewed on October 31, 2006). Thesis adviser: Mark Schneegurt. Includes bibliographic references (leaves 41-58).
Anorov, Julie Margaret, and n/a. "Integrated Study of Coastal Wetland Characteristics and Geomorphic Processes in a South East Queensland Catchment." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060223.153104.
Full textChao, Shir-Ley. "Relationships among patient characteristics, care processes, and outcomes for patients in coronary care units (CCUs)." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276836.
Full textAdam, William George. "The relationship between subglacial processes, basal ice characteristics and ice marginal moraines : a sedimentological approach." Thesis, Keele University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518415.
Full textPlum, Alexander B. "Tasks and characteristics of end users during the open innovation processes on the social web." Thesis, Teesside University, 2012. http://hdl.handle.net/10149/237391.
Full textTipsrisukond, Narin. "Impact of lipid degradation processes, and supercritical carbon dioxide extraction on flavor characteristics of lard /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3091972.
Full textCarroll-Scott, Amy. "Neighborhood structural characteristics, social processes, and child wellbeing a multilevel study in two urban contexts /." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1708983661&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Full textVanHorn, Gregory Ray. "Characteristics and Decision-Making Processes of Collaborative Teams inDetermining Instructional Strategies: An Ethnographic Case Study." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523014710710291.
Full textMatthews, Lauri Luce. "Top Management Groups: the Relationships among Member Characteristics, Group Processes, Business Environments, and Organizational Performance." Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc277707/.
Full textHüfner, Anna. "Gold nanoparticles explore cells : molecular insights into cellular characteristics and processes using surface-enhanced Raman spectroscopy." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708921.
Full textHunsberger, Aaron Stuart. "Afrocentric facial characteristics and processes of dehumanization : evidence from the stereotype content model and infra-humanization." Thesis, Lancaster University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.697933.
Full textTomback, Robert M. "Characteristics of classroom contexts, self-processes, engagement, and achievement across the transition from middle school to high school." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/6661.
Full textThesis research directed by: Human Development. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
CHANG, WEI-YU, and 張瑋淯. "Characteristics of Aerosols Generated During Furniture Processes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/s98nm4.
Full text嘉南藥理大學
職業安全衛生系
106
Wood dust from furniture manufacturing can be hazardous to workers' health. Therefore, it is necessary to understand the characteristics of wood dust produced from each furniture manufacturing unit and put forward the furniture manufacturing industry with wood dust occupational health management to protect workers. A typical furniture factory was selected to explore the haracteristics of wood dust produced from six units in the furniture manufacturing process. The six units are lumber cutting (S1), surface planing (S2), section planing (S3), processing cutting (S4), patching and sanding of semi-finished product (S5), sanding of semi-finished product sprayed with paint (S6). Wood dust from furniture manufacturing was measured continuously for nine hours (working hours 08:00-12:00, 13:00-17:00, noon break 12:00-13:00) using a dust particle size analyzer (Grimm 1.109) at a fixed location in each manufacturing unit area. Mass concentration (inhalable, thoracic and respirable dust fractions), particle number concentration and particle size distribution (0.25μm~32μm) of wood dust were measured in this study. The results show that the wood dust produced from furniture manufacturing increased the concentration of wood dust in the air of workplace obviously. The concentration of thoracic and respirable wood dust accounted for 46.6% ~ 62.7% and 17.0% ~ 34.7% of the concentration of inhalable wood dust. During working time and rest time, the concentration of wood dust measured was the highest in section planing area (S3) and the lowest in lumber cutting area (S1). The use of air spray guns to clean the body, machine and wood objects can raise the coarse wood dust. The size of wood dust produced from other working activities is mainly distributed within the sub-micron range. The roughness of sandpaper can affect the size of wood dust produced by sanding. The size of wood dust produced by sandpaper with small roughness is also small. The installation of the local exhaust device in furniture manufacturing can capture wood dust and effectively reduce mass and particle number concentrations of wood dust in the working environment. It is recommended to select suitable and feasible prevention methods for wood dust based on a comprehensive assessment of source control (local exhaust, dust collection equipment, wetting or isolation), environmental transmission route control (cleaning or wetting) and personal protection (dust protective equipment) according to the characteristics of each furniture manufacturing unit. The actual implementation of occupational health management should be able to effectively reduce the workers to expose wood dust
Chin, We-hau, and 金惟豪. "Processes and Characteristics of Lead-free Thick-film Resistors." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/01782561700234880683.
Full text義守大學
材料科學與工程學系碩士班
93
Lead-free thick-film resistors (TFR) were prepared starting from ruthenium oxide (RuO2) and a lead-free glass( K20-CaO-B2O3-SiO2). The relationships between the electrical properties and microstructures of the resistors were discussed. The resistors were post-fired on alumina substrates with sintering temperature 850℃, dwelling time 75 min and commercial size 1210 with sintering temperature 850℃, dwelling time 8 min respectively. The interactions between the resistors film and alumina substrates resulted in diffuseness during sintering process. The effect of these interactions on the sheet resistance and temperature coefficient of the resistor(TCR)is discussed. The sheet resistivities of the film resistors prepared in this study were in the ranges between 0.1 and 100 Ω/sq , and the TCR values of the resistors were less than ±100 ppm/℃. When RuO2 /glass volume ratio equaled to 10/90, the sheet resistively of the resistor was 14.7 Ω/sq , it had TCR value of 101.4 ppm/℃. Various oxides, such as TiO2, Fe2O3, were added to RuO2 thick film resistors as temperature coefficient of the resistor adjustment agent. From the results of this study, it indicated that increasing the TiO2 contents, the TCR values of the resistors moved toward negative direction. Resistivities of the resistors film increased with increasing TiO2 contents. However, both resistivity and TCR value of the resistor decreased with increasing Fe2O3 content.
Lee, Jia-Huei, and 李佳蕙. "A Variables Sampling Plan for Processes with Multiple Characteristics." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/98735885301234541415.
Full text國立交通大學
工業工程與管理系所
97
Acceptance sampling plans have been one of the most practical tools used in classical quality control applications. It is a practical tool for quality assurance applications involving quality contract on product orders. The sampling plans provide the vendor and buyer decision rules for product acceptance to meet the present product quality requirement. A well-designed sampling plan can effectively reduce the difference between the actual supply quantity and order quantity. According to today’s modern quality improvement theory, the manufactured product involving more than one quality characteristic is quite common. Therefore, in this paper, we introduce a new variables sampling plan based on process capability index to deal with product acceptance determination for multiple characteristics. Practitioners can use the proposed method to determine the number of required in section units, the critical acceptance value, and make reliable decisions in product acceptance. At the end, a case study is also presented to illustrate how the proposed procedure can be constructed and applied to the real applications.
Tsai, Meng-Chun, and 蔡孟純. "Capability Measures for One-Sided Processes with Multiple Characteristics." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/99922909195481165596.
Full text國立交通大學
工業工程與管理學系
99
Process capability indices (PCIs) have been proposed in the manufacturing industry to provide numerical measures on process capability, which are effective tools for quality assurance and guidance for process improvement. These four indices (Cp, Cpk, Cpm and Cpmk) measure for processes with two-sided specifications. However, the product quality characteristics are with one-sided specification and PCIs , are adopted. But these indices only investigate the process with single characteristic. We consider the index proposal by Wu and Pearn (2005) and an asymptotic normal distribution of is derived from for processes with multiple independent characteristics. The natural estimator, the sample distribution and the lower confidence bound of are obtained. A statistical hypothesis testing procedure is provided for testing whether the performance of a process satisfies the preset capability benchmark. An application example is presented.
Chang, Chin-Fa, and 張晉發. "Leaking Characteristics of Equipment Components for Petrochemical Plant Processes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/87476663618205518234.
Full text輔英科技大學
環境工程與科學系碩士班
99
This study investigated and analyzed the characteristics of VOCs leakage for the petrochemical plants in the Kao-Ping air quality control areas. The investigated method was based on the Environmental Analysis Laboratory of Taiwan’s EPA, which was used to detect the leaking concentration and estimated VOCs emissions through the measurement equipment components. The results indicated that the leakage ratios following the regulated leakage definition over 2,000 ppm in 2008, 2009 and 2010 were 0.44%, 0.71% and 1.20%, respectively. The highest of leakage ratio was the sampling connection device (8.33%), the second of leakage ratio was the control valve (4.49%), and the third of leakage ratio was the opening line of light fluid (3.85%). To analyze the VOCs species of top 10 high ozone creation potential in the Kao-Ping air quality control areas, the equipment components of higher leakage ratio included p-xylene, ethylene, toluene and o-xylene. Furthermore, the methods of USEPA AP-42 emission factors were utilized to analyze the VOCs leaking emissions, including the level coefficient method, the SOCMI average method, and the non-spill/non-leakage coefficient method. Results showed that the SOCMI average method had the most difference among the above methods. The following was the non-spill/non-leak coefficient method. The last was the level coefficient method, which resulted in the less difference, and it was also similar with the current standard. As for the leakage and fugitive emissions of equipment components, if the self-test an inspection is found leakage and repairs leakage below the regulatory definition, this is the best solution for the petrochemical plants to improve the polluted emissions of the equipment components.
Huang, Jia-Yu, and 黃家瑜. "Group Selection for Two-Sided Processes with Multiple Characteristics." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/39466c.
Full text國立交通大學
工業工程與管理系所
105
In this thesis, we consider the supplier selection problem which deals with comparing two-sided processes with multiple characteristics and selecting a group that has a significantly higher capability value based on the process capability index C_pk^T. We present the Bonferroni method to tackle the supplier selection problem. We take the difference C ̂_pk^T values of any two suppliers as the test statistic. For the Bonferroni method, we provide the testing hypothesis for comparing any of two suppliers’ performance and examining the process capability difference between two suppliers. We present the critical values for the testing procedure, comparison the power of the Bonferroni method and the MCB method, required sample sizes for designated selection powers and to illustrate the practicality of this approach. Three application examples on a two-sided process with multiple characteristics are presented to compare with the Bonferroni method and the MCB method.
Chen, Yu-Hsuan, and 陳妤宣. "Group Selection for One-Sided Processes with Multiple Characteristics." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/b5rv94.
Full text國立交通大學
工業工程與管理系所
105
The decision-maker usually faces the problem of selecting the best manufacturing material supplier – the one with the largest capability index – from several available suppliers in the initial stage of production setting. In this thesis, we consider the group selection problem for one-sided processes with multiple independent characteristics. More specifically, the aim of this thesis is to select all the possibly best suppliers into a group among k (k > 2) suppliers based on CpuT. An effective selection procedure is developed for practical applications. We apply the Bonferroni method to deal with multiple comparisons problem. For practitioners’ convenience, critical values for testing procedure and required sample sizes for a designated selection power are also investigated and tabulated. In addition, we compare the power between two multiple comparisons techniques, Bonferroni method and multiple comparisons with the best (MCB) method. The application examples for one-sided processes with multiple characteristics are presented to illustrate the practicality of this approach.
Huang, Yung-Han, and 黃永翰. "Preparation Processes and Characteristics of Metal-Oxide Composite Catalysts." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/8ysakc.
Full text國立臺北科技大學
材料科學與工程研究所
103
There are two different approaches in this thesis. One approach is to synthesize spinel-type oxides as a precursor preparing Cu or Ni catalysts for steam reforming of methanol (SRM). The other approach focuses on preparation of Au or Pt catalysts from intemetallic compounds or amorphous alloys to perform CO oxidation reaction. These approaches in terms of the ellingham diagram which is usually used to evaluate the ease of reduction of metal oxides or oxidation of metal. Firstly, various Cu-based spinel compounds, i.e., CuFe2O4, CuMn2O4, CuAl2O4 and CuLa2O4 were fabricated by a solid-state reaction method. H2-TPR results indicated that reducibility of Cu-based spinel compounds was strongly dependent on the B-site component where the CuFe2O4 catalyst revealed the lowest reduction temperature (190°C), followed by CuAl2O4 (267°C), CuMn2O4 (270°C) and CuLa2O4 (326°C). The reduced CuAl2O4 catalyst revealed the best performance in terms of catalytic activity. Based on the SEM and XRD results, pulverization of the CuAl2O4 particles due to gas evolution and a high density of nanosized Cu particles (50.9 nm) precipitated on the surfaces of the Al2O3 support were observed after reduction at 360°C in H2. Reduction of Cu-based spinel compounds appear to be a potential synthesis route for preparing a catalyst with high catalytic activity and thermal stability. The catalytic performance of these copper-oxides composites was superior to those of conventional copper catalysts. Secondly, Fe3O4-supported Cu and Ni catalysts are prepared through reduction of Cu-Ni (Ni1-xCuxFe2O4) ferrites. All ferrites are characterized with granular morphology and a smooth particle surface before reduction. Reduction temperature for the CuFe2O4, Ni0.5Cu0.5Fe2O4 and NiFe2O4 ferrites were 240, 300, and 400°C, respectively, in which nanosized Cu and/or Ni particles (5-32 nm) and mesopores (5-30 nm) are distributed and adhered on the surfaces of Fe3O4 supports. After the reduction treatment at temperature higher than 500°C for NiFe2O4 ferrite, the Ni particles and mesopores disappear from the Fe3O4 surfaces, which is due to the formation of a Fe-Ni alloy covered on the Fe3O4 surfaces. The CuFe2O4 ferrite after H2 reduction at 240°C exhibits the highest activity quoted with H2 production rate of 149 ml STP/min.g-cat at 360°C. The existence of Ni in the Cu-Ni ferrites enhances the reverse water gas shift reaction, raises the CO selectivity and reduces the CO2 selectivity. Formation of the Fe-Ni alloy exaggerates the trend and poisons the H2 production rate. Finally, in order to develop a process for preparation of a new form of catalyst where Au, Pt fine particles supported on metal oxides (ZrO2, Fe2O3), Au or Pt–contained Zr2Fe-based intermetallic compounds and amorphous alloys were used as precursors for oxidation treatment. The catalytic properties of Au, Pt/metal oxides catalysts prepared by crystallization or oxidation have been investigated with CO oxidation reaction (CO+1/2O2→CO2). Zr67Fe33, Zr67Fe30Au3 and Zr67Fe30Pt3 alloys were prepared by arc-melting in Ar atmosphere. Amorphous phase was further fabricated by single-roller melt spinning in an Ar atmosphere. The catalysts were obtained by annealing amorphous ribbons at elevated temperatures. After the oxidation process, metal-oxide composite catalysts of Au, Pt/ZrO2-Fe2O3 were obtained. The changes in the intermetallic compounds and amorphous alloy ribbons before and after the oxidation treatment were analyzed, and the effects of the oxidation features and mechanisms on the catalytic activity of the catalyst was investigated. On the other hand, the metal/oxide complex catalyst (Au, Pt/CeO2-NiO) was successfully synthesized using the cerium-based intermetallic compound Ce50Ni50 as a precursor and replacing Ni with a small quantity of Au or Pt. The catalytic properties of CeO2-NiO supported Au and Pt catalysts for the CO oxidation reaction were investigated. The catalysts were obtained by oxidation treatment at elevated temperatures. The cerium metal in the intermetallic compound was easily oxidized to CeO2 during the oxidation process, in which Au or Pt particles precipitated on the surface and promoted the overall catalytic activity. This was especially clear when intermetallic Ce50Ni45Au5 was tested in the reaction bed directly; Au and Ni particles precipitated to the surface of the CeO2 support and were evenly distributed after five cycles of a heating and cooling test.
Lin, Chun Jen, and 林俊仁. "The study on characteristics and processes of love intimate homicide." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/10722288369920268521.
Full text國立中正大學
犯罪防治研究所
99
This study attempted to explore the characteristics and processes of love intimate homicide in Taiwan and used the convergence design to achieve above goals. In quantitative research, 384 convicted documentations from District Court, between 2000-2010, were carefully collected and analyzed so as to explore various characteristics of love intimate homicide. Qualitative interviews were conducted to 7 inmates who killed their girl friends and now still incarcerated in Yunlin, Tainan and Kaohsiung prisons by purposive sampling and semi-structured interview. The quantitative results showed that the perpetrators who killed their beloved were overwhelmingly male (91.9%) and the typical gender pattern was the male offered to murder the female victim (73.7%). The main categories of homicide causes were romantic breakup (41.4%) and love jealousy (35.2%). 32.6 percent of the killings occurred in victims’ home, 20.1% in the cohabited house. Affection murders were more likely to take place during the evening between 20-24 p.m. Knives and sharp instruments (64.6%) were most likely to be used in killing the beloveds and one-third of the victims died on the spot on that moment. 11.7 percent of perpetrators committed suicide after the killing happened. The average length of the sentence is 8.31 years. The qualitative results were as follows: (1)Perpetrators’ background, like dysfunctional family, criminal record, failed marriage, negative occupation and entertainment, etc, will affect the choosing and start of romantic relationship and partner. (2)The differences in personality, values, hobbits, financial pressure, communication, attraction and commitment will increase conflicts in daily life and affect the intimate relationship. (3)The character contest: role claiming, role rejection, role sparring, role enforcement and role determination will initiate violent encounters. (4)The jealousy: emotional infidelity or sexual betray, will generate negative feelings and malice interpretation, then encourage perpetrators to revenge. (5)The perpetrators will use violence to get back the advantage status and control in their relationship, or make reprisals to their discontentment. (6)Once, violent encounters, breakup and jealousy result in harm, then the suffering will lead to negative interpretation and encourage to attack the love traitor. (7)Lost control of emotion, alcohol affected, lack of stopping mechanism will result in severer fatal assault and end in killings.. (8)After killing the beloved, perpetrators will committe suicide or hurt themselves in regrets.
Chen, Shih-Jhang, and 陳世璋. "Study on Electrochemical Deposition Processes and Characteristics of Fe-Ga Alloy." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14862395913124721853.
Full text國立中正大學
機械工程所
98
Magnetic deformation properties of magnetic materials called magnetostrictive, it’s property can exchage electromagnetic energy to mechanical energy one another. The former representative material,Terfenol-D, has been commercialized because of their high mechanical strength, stable performance,and low equivalent input impedance and is widely used in various fields. The Fe-Ga alloy, recent developed magnetic material, becomes the high potential research object due to the better the magnetic properties than Terfenol-D. Current literature published Fe-Ga alloy films is mainly fabricated by high-cost semiconductor equipment. The target of the experiment attempted to use low-cost electrodeposition method and Taguchi method to draw up the procedure in order to find the relationship between the electrodeposition parameter conditions and the characters of each material, finally get the optimal parameter condition. The results show that solution concentration, deposition time, and temperature are the vital conditions to control the film component during the process parameters of the electrochemical deposition. To take the Ga content into account, the parameters of GaCl3 concentration, current density,and pH and deposition temperature were positively correlated with it, others were nonlinear relations,in addition, the effect of the GaCl3 concentration was severe to the experiment. The magnetic coercivity (Hc), was severely affected by the deposition time which was inverse to the Hc among the parameters, and rest were nonlinear relations. The magnetostriction reached 333ppm under the condition of Ga content being 16%.
Kao, Chun-Min, and 高君敏. "Product Acceptance Sampling Plan for One-Sided Processes with Multiple Characteristics." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/31881916201815061060.
Full text國立交通大學
統計學研究所
99
In statistical quality control, acceptance sampling plans can be used for quality assurance applications involving quality contract on product orders between producer and consumer. With the rapid advancement of manufacturing technology, producers require their products have high quality with law fraction of defectives in parts per million. In practical, in order to improve the product quality due to the product design, more than one quality characteristic must be simultaneously considered. Hence, in this study, we propose a new sampling plan based on process capability index Cpu^T to deal with product acceptance determination for multiple characteristics and very low fraction of defective. We tabulate the required sample size and the corresponding critical acceptance value for various producer’s risks, the consumer's risks with the capability requirement AQL and LTPD. Practitioners can use the proposed new sampling plan to determine the sample size n and the corresponding critical acceptance value c0 to make reliable decision in product acceptance.
Raineault, Nicole A. "Effects of bulkheads on estuarine beach swash zone processes and characteristics." 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17376.
Full textDuggins, Ronald. "The learning processes, characteristics, and behaviors of necessity entrepreneurs in Brazil." 2005. http://digital.library.okstate.edu/etd/umi-okstate-1253.pdf.
Full textChun-TingChen and 陳俊庭. "Effects of Different Processes on the Characteristics and Reliability of FinFET." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/66d4z4.
Full textYaFei, Chuang, and 莊雅斐. "PCI Methodology Applied to Multiple Characteristics and Tool Wear Manufacturing Processes." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/50994307379363897573.
Full text國立交通大學
工業工程與管理系所
94
Process capability indices have been widely used in the manufacturing industry and provided numerical measures on process performance. However, process capability indices seem to be easy and straightforward to apply. That is because of some assumption must be satisfied: the process under investigation is free from any special or assignable cause, the process characteristic is normal distributed, and the observations of quality characteristics are statistically independent. However, these conditions are not always fulfilled in many manufacturing situations. In real world, process is always influenced by some assignable cause. In addition, capability measure for processes with single characteristic has been investigated extensively, but capability measure for processes with multiple characteristics is comparatively neglected. In the thesis, the process capability indices for multi-characteristics of one-sided process and the modified index for tool wear process are proposed. Two real-world examples from multiple characteristics process and tool wear process respectively are taken to illustrate the applications of the propose approaches. For the first example, we used four bootstrap methods to estimating and compare the estimation precision of these methods. The results indicated that the BCPB method has better performance based on estimation precision than others. The table of the lower confidence bound values and sample sizes required for specified precision of the estimation is provided for the practitioners. For the second example, a procedure of capability measure with assignable causes is developed, and the critical value for various values capability requirements and sample size are provided. The proposed procedure is similar to those used in monitoring a process with control chart, and used to monitor the process and decide if the process should stop and replace the tool to avoid producing unacceptable products.