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Dissertations / Theses on the topic 'Shape improvement'

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1

Blocher, Richard Paul. "Predictive Tools for the Improvement of Shape Memory Alloy Performance." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1556022653899471.

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2

Chua, Hung Soon. "Shape sensitivity of parametric CAD models and strategies for their improvement." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546029.

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3

Urbina, Pons Cristina. "Improvement of the one-way and two-way shape memory effects in ti-ni shape memory alloys by thermomechanical treatments." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/37358.

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Ti-Ni phase transformation behaviour is very sensitive to the thermal and mechanical history of the alloy. Thermomechanical cycling through the full transformation range may degrade the Ti-Ni functional properties (functional fatigue). These repeated transformation cycles cause changes in the SMA phase transformation behaviour due to the formation and accumulation of defects in the alloy microstructure. The main objective of this thesis is to establish the relationships between the changes in Ti-Ni phase transformation behaviour caused by thermomechanical processes, especially in the R-phase
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Navajas, Valentini Elly Ana. "Carcass shape and meat eating quality in sheep : opportunities for genetic improvement using computed tomography." Thesis, University of Edinburgh, 2008. http://hdl.handle.net/1842/27108.

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This thesis reports on an investigation of the association between muscularity and meat quality in Scottish Blackface (SBF) and Texel (TEX) lambs, and the in vivo assessments of these traits using X-ray computed tomography (CT) with a view to their possible inclusion in breeding programmes. The objectives of this work were: (i) to develop comprehensive in vivo assessments of muscularity using spiral CT scans; (ii) examine the relationship of the new muscularity indices with carcass and eating quality; (iii) explore the associations among CT assessments of carcass composition, muscularity and m
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Turek, Vojtěch. "New Elements of Heat Transfer Efficiency Improvement in Systems and Units." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-234141.

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Zvýšení efektivity výměny tepla vede k poklesu spotřeby energie, což se následně projeví sníženými provozními náklady, poklesem produkce emisí a potažmo také snížením dopadu na životní prostředí. Běžné způsoby zefektivňování přenosu tepla jako např. přidání žeber či vestaveb do trubek ovšem nemusí být vždy vhodné nebo proveditelné -- zvláště při rekuperaci tepla z proudů s vysokou zanášivostí. Jelikož intenzita přestupu tepla závisí i na charakteru proudění, distribuci toku a zanášení, které lze všechny výrazně ovlivnit tvarem jednotlivých součástí distribučního systému, bylo sestaveno několik
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Belinski, Robert A. "An analysis, design, and improvement methodology for shape rolling processes and procedures for the compensation of dies." Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175264501.

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7

Adams, Ryan, and s200866s@student rmit edu au. "Evaluation of computerised methods of design optimisation and its application to engineering practice." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070130.122013.

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The ongoing drive for lighter and more efficient structural components by the commercial engineering industry has resulted in the rapid adoption of the finite element method (FE) for design analysis. Satisfied with the success of finite elements in reducing prototyping costs and overall production times, the industry has begun to look at other areas where the finite element method can save time, and in particular, improve designs. First, the mathematical methods of optimisation, on which the methods of structural design improvement are based, are presented. This includes the meth
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8

Peng, You Ph D. Massachusetts Institute of Technology. "Crystallization of calcium sulphate during phosphoric acid production : improving filtration through improvement in particle shape and size distribution." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/117887.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 155-162).<br>The production of phosphoric acid from phosphate mineral rock involves the addition of phosphate rock to a concentrated sulfuric acid solution. The induced reactive crystallization process produces a side product of calcium sulfate hydrates, which become the filter media in the subsequent acid separation process. For most industrial processes, the dihydrate form of calcium sulfate crystals (gypsum) p
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9

Scheller, Johannes. "Electroactive morphing for the aerodynamic performance improvement of next generation airvehicles." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/14479/1/scheller_partie_1_sur_2_2.pdf.

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The need to improve the aerodynamic performance of air vehicles is the origin of intense research on the real-time optimization of the airfoil shape. This real-time optimization can only be achieved by morphing the airfoil using adequate materials and actuators. The object of this thesis is to study smart-material actuators for aerodynamic performance optimization on different time scales (low-frequent and high-frequent actuation). First, the effects of the distinct actuation types, low-frequency large-displacement shape-memory alloy (SMA) and high-frequency low-displacement piezoelectric, on
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10

Oschmann, Tobias Sebastian [Verfasser], Harald [Akademischer Betreuer] Kruggel-Emden, Harald [Gutachter] Kruggel-Emden, and Viktor [Gutachter] Scherer. "Extension and improvement of the coupled CFD-DEM approach to describe multidimensional heat transfer and non-spherical particle shape for fluidized systems / Tobias Sebastian Oschmann ; Gutachter: Harald Kruggel-Emden, Viktor Scherer ; Betreuer: Harald Kruggel-Emden." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1184983836/34.

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11

GOPAL, SRIKANT. "SYNTHESIS, MODIFICATION, CHARACTERIZATION AND CATALYTIC STUDIES OF ZEOLITE BASED BIFUNCTIONAL CATALYSTS FOR HYDROISOMERIZATION REACTION." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1061218813.

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12

Salem, Yousef. "Clinical evaluation of shade improvement after in-office vital bleaching." University of the Western Cape, 2010. http://hdl.handle.net/11394/5383.

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Magister Scientiae Dentium - MSc(Dent)<br>Tooth discoloration has increased the demand by patients to pursue aesthetic treatment options. Bleaching is considered a conservative approach in performing an aesthetic treatment for discolored teeth; however colour rebound and post-operative sensitivity are among the adverse effects associated with vital bleaching. In-office bleaching systems employ the use of high hydrogen peroxide concentrations. The effects of in-office bleaching agents on the degree of colour change and the gender differences in relation to bleaching outcomes are questionable. P
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McLaughlin, Belinda. "Corporate Social Responsibility Factors in Market Share and Financial Performance Improvement." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/4389.

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Some corporate leaders lack knowledge of CSR strategies to improve corporate financial performance. Businesses increase their profit margins when the business leaders integrate social and environmental management into core business processes. Grounded in stakeholder theory, this multicase study involved an exploration of corporate social responsibility factors that contributory to improving market share and financial performance. One-on-one interviews took place, and corporate leaders of 3 Native American owned companies that have implemented successful CSR strategies to improve market share a
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Elshenawy, Tamer Abdelazim. "Criteria of design improvement of shaped charges used as oil well perforators." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/criteria-of-design-improvement-of-shaped-charges-used-as-oil-well-perforators(d627c23e-a05b-42a2-86c3-6d67dfd7b7a7).html.

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In addition to its various military applications, shaped charges have been used in oil industry as an oil well perforator (OWP) to connect oil and gas to their reservoirs. The collapse of the liner material under the explosive load produces a hypervelocity jet capable of achieving a deep penetration tunnel into the rock formation. The achieved penetration depends on the OWP design, which includes the geometry and the material of the explosive and the liner as well as the initiation mode and the casing of the shaped charge. The main purpose of this research is to assess the performance of OWP w
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15

Forbes, Daniel. "Efficiency Performance Improvement Using Parallel DC-DC Converters with a Digital Controller." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/736.

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A system to improve efficiency performance of a DC-DC converter is simulated and built. The proposed system combines multiple DC-DC converters in parallel and implements a digital control scheme and load-share controller. A model of the system is developed in MATLAB Simulink and the model demonstrates the improved converter’s efficiency particularly at low load conditions. This simulation is then designed into a hardware system running three DC-DC converters in parallel, controlled by a microcontroller and a load-share controller. The hardware also confirms the simulation results, although som
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16

Wikström, Jenny. "Present-day constraints and prospects for improvements in shade management in cacao cultivation in two Mayan villages in Toledo District, Belize." Thesis, Högskolan i Gävle, Akademin för teknik och miljö, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-16567.

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Slash-and-burn agriculture is, under conditions with increasing pressure on resources, one cause of deforestation and land degradation. The Mayas of southern Belize use a type of slash-and-burn farming which is currently degrading the environment. On the other hand, cacao cultivation can be an integrated part of multi-storey agroforestry systems, indicated to provide capacity to maintain biodiversity. The Mayas have traditionally farmed cacao and it is now becoming an important cash crop in the district. Institutional stakeholders in Toledo district and six cacao farmers in two Mayan villages
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17

Ukkonen, K. (Kaisa). "Improvement of recombinant protein production in shaken cultures:focus on aeration and enzyme-controlled glucose feeding." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526203621.

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Abstract Efficient production of biologically functional recombinant proteins is a cornerstone of modern biotechnological research. Laboratory-scale protein production is most commonly accomplished in simple shaking bioreactors such as shake flasks. However, productivity of these cultures is often severely limited by low biomass yield and non-optimal growth conditions regarding medium composition, pH and oxygen supply. In many cases, poor culture performance can constitute a major research bottleneck. This study aims to improve recombinant protein production in shaking Escherichia coli culture
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18

Almadi, Alaa. "Investigating mechanical properties of ordinary portland cement : investigating improvements to the mechanical properties of Ordinary Portland Cement (OPC) bodies by utilizing the phase transformation properties of a ceramic (zirconia)." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/7315.

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The effects of metastable tetragonal zirconia on the properties of Ordinary Portland Cement were observed during which the effect of crystallite size pH on the preparation solution, precursor salt, and the presence of co-precipitates, Fe(OH)3, SnO2 and SiO2 on the crystallization temperature, enthalpy and crystal structure, immediately following the crystallization exothermic burst phenomenon in ZrO2 were measured. Thermal analysis and x-ray methods were used to determine crystallite sizes and structures immediately following the exothermic burst. Comparisons were made for zirconias prepared f
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19

Kašparová, Petra. "Dopad rekodifikace občanského a obchodního práva na české účetní předpisy." Master's thesis, Vysoká škola ekonomická v Praze, 2013. http://www.nusl.cz/ntk/nusl-191579.

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The Czech accounting standards have been amended many times yet. They were nevertheless adjusted in connection with the recodification of the private law on January 1st, 2014. Main output of this recodification was "The new civil code" and "The law about commercial corporations". The diploma thesis examines the impact of these legal standards on the Czech accounting standards. Apart from that, the new civil law brings also new terminology, what has consequently an impact on legislative and technical changes of the Czech accounting standards. Moreover the thesis talks about selected recodificat
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20

Dvořáková, Monika. "Vliv zákaznické spokojenosti a dalších ukazatelů na tržní podíl společnosti." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-192443.

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In the present hypercompetitive market environment of car producers established especially at the developed west european markets is very difficult to gain new customers and increase the market share. The car producing companies have to build and increase customer loyalty to ensure the sustainable growth of market share in the future. One possibility how to improve customer's loyality to brand is to provide the highest standard at both sales and service department and carefully monitor the customer satisfaction. From the satisfaction and performance indicators of the car producing company is p
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21

Sanchez, Sanchez Hector. "The evaluation and improvement of 3D shape acquisition techniques." 2004. http://hdl.handle.net/1993/15759.

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22

Hsiu, Yang-Cheng, and 楊政修. "The Improvement of Erosion-Resistanceof TiNi Shape Memory Alloys." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/4fmypq.

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碩士<br>逢甲大學<br>材料科學所<br>90<br>Abstract The Ti49Ni51 and Ti50Ni50 alloys were used and prepared by vacuum arc remelting technique. We studied the basic properties and erosion characteristics of these alloys subjected to solution treatment, aging and cold working. The erosion characteristics of these alloys have been systematically studied by using cavitation erosion, gas-solid and liquid-solid impingement tests. Experimental results show that the aged Ti49Ni51 alloy can exhibit a better erosion resistance because of the effects of precipitate hardening and stress-induced martensitic (SIM) transf
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23

Delgado, João Ricardo Ferreira. "A SDK improvement towards gesture support." Master's thesis, 2014. http://hdl.handle.net/10362/14100.

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Human-Computer Interaction have been one of the main focus of the technological community, specially the Natural User Interfaces (NUI) field of research as, since the launch of the Kinect Sensor, the goal to achieve fully natural interfaces just got a lot closer to reality. Taking advantage of this conditions the following research work proposes to compute the hand skeleton in order to recognize Sign Language Shapes. The proposed solution uses the Kinect Sensor to achieve a good segmentation and image analysis algorithms to extend the skeleton from the extraction of high-level features. In or
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SU, PEI-CHEN, and 蘇培珍. "Properties Improvement of Ti49Ni51 Shape Memory Alloy by Cold-Rolling." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/84904778706639552215.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>91<br>Transformation behaviors and mechanical properties of Ti49Ni51 shape memory alloy after cold rolling and subsequent aging were investigated in this study. After cold rolling and aging, the martensitic transformation of Ti49Ni51 is suppressed. As the rolling reduction increases, transformation ΔH decreases as well. Under 500℃ aging for a long period, it appears a four-step multi-stage transformation (MST), which is not found in previous researches where showed mostly three-step MST. In this four-step MST, one is B2àR, and among the other three steps, two are
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Li, Zhi-Qing, and 李志清. "Analysis and Improvement of Warping andSpringback for Aluminum Alloy U-shape Bending." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/zzsdxt.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>96<br>This study mainly develops a simulation algorithm to analyze the stresses and deformation behavior of aluminum sheet metal (A5052P-H32) going on U-shape bending in a circular die cavity using ABAQUS finite element programs. The diameter of the round die is 60 mm, depth of U-shape bending is 50.8 mm, and the thickness of sheet material is 1/32" (0.794 mm). The variables considered for bending simulation include different width of sheet metal ranging from 20 mm to 50 mm, two average punching speeds (63 mm/sec and 151 mm/sec), and with or without using stripper
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Liao, Che-Wei, and 廖哲暐. "A Study on Drum Shape Error in WEDM and the Improvement Strategy." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/93932780319549081994.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>98<br>WEDM is a machining process using thin wire electrodes. Because of the flexibility of the wire electrodes, there would be vertical alignment geometric error left on the machined surface. In most workshop practice, the error is corrected through multiple surface-finishing process, which is not efficient in time and cost.The previous studies over this issue proposed that the vertical alignment geometric error were out of two mechanisms – either vibration of the wire electrodes, or the ineffective of debris removal – both making the uneven distribution of the ele
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27

Sun, Hongtao. "Efficiency Improvement of Evolutionary Multiobjective Optimization Methods for CFD-Based Shape Optimization." Phd thesis, 2010. https://tuprints.ulb.tu-darmstadt.de/2182/1/Dissertation_Hongtao_Sun_TUD_03.pdf.

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This dissertation presents an efficient optimization methodology to solve the CFD-based shape optimization problems. This methodology is based on evolutionary algorithms (EAs) for their well-known derivative-free property as well as the advantages in dealing with multiobjective optimization problems (MOOPs) and providing the global optimal solutions. Meanwhile, the approximation models and the deterministic optimization methods are combined with EA to improve the optimization efficiency and the local convergence. The optimization process consists of two parts: the design space exploration usin
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Lee, Jui-Chi, and 李瑞騏. "Improvement of NiTi Shape Memory Alloy Biocompatibility by Polymerized Hexamethyldisilazane Using Pulsed-DC PECVD." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/80679370049904734444.

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碩士<br>大同大學<br>材料工程研究所<br>91<br>In recent years, shape memory and superelastic nickel-titanium alloys have been increasingly used in many fields for various applications. In orthopedic surgery, NiTi applications currently include NiTi compression bone stables used in osteotomy and fracture fixation, NiTi rods for the correction of scoliosis, shape memory expansion clamps used in cervical surgery, clamps in small bone surgery, and fixator systems for suturing tissue in minimal access surgery. However, the high nickel content of NiTi could cause biocompatibility problems, since nickel may have to
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Sun, Hongtao [Verfasser]. "Efficiency improvement of evolutionary multiobjective optimization methods for CFD-based shape optimization / von Hongtao Sun." 2010. http://d-nb.info/1003588093/34.

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shih, chih-wen, and 史智文. "Factors Resulting in Shape Defect of Steel Billets and Strategies for Improvement on Processing Control." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/18105743931257871210.

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碩士<br>國立中興大學<br>機械工程學系所<br>100<br>Rhomboidity is also called off-square. If it is serious, the billet will have diagonal crack in the interior, or crack in the corner accompanying with concave surface. Also, it would cause inconvenience in pushing billet in heating furnace and result in difficulty on biting billet between rollers. Thus reducing rhomboidity of billet is an important subject for increasing production. In this work, firstly, the effect of composition of [C] 、 [S] and [Mn] in molten steel on rhomboidity was investigated the composition and improving steel-making process, the def
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Liu, Xiangyu active 21st century. "Zonal isolation improvement through enhanced cement-shale bonding." Thesis, 2014. http://hdl.handle.net/2152/28660.

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The incompatibility of cement and shale and the subsequent failure of primary cementing jobs is a very significant concern in the oil & gas industry. On wells ranging from hydraulically fractured shale land wells to deepwater wells, this incompatibility leads to an increased risk in failing to isolate zones, which could possibly present a well control hazard and can lead to sustained casing pressure. The cement-shale interface presents a weak link that often becomes compromised by the loads incurred either during drilling, completion/stimulation or production phases. To formulate cements for e
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Santos, Cláudia Sofia Vieira. "Improvement of Lipton’s business model through wholesalers and traditional supermarkets channel." Master's thesis, 2014. http://hdl.handle.net/10362/14618.

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Field Lab in Entrepreneurial Innovative Ventures<br>As opposed to what is happening in other categories, tea category has been increasing over the years in the Portuguese market. So, the main goal of this project is to propose measures, so that Lipton improve its business model through wholesalers and traditional supermarkets, with the ultimate objective of increase its market share. In this sense, it will be presented an evaluation of the leaf tea market and its potential, as well as Lipton’s business model, followed by a risk analysis and recommendations, in terms of product, place, promo
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Chinh, Tran Trung, and 陳忠正. "Improvement on Market Share of Activities in Vietnam LPG Co., Ltd (VT-Gas)." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/85699832620393054349.

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碩士<br>美和科技大學<br>經營管理研究所<br>100<br>Energy resources become more and more important in the world in general and in Vietnam in particular. In Vietnam, petroleum industry has played an important role and contributed significantly to national income. Gas section is not only a new field but also a potential part of Vietnamese Petroleum industry. In order to manage and ensure partly the strategic national energy resources, Vietnam LPG Co., Ltd (VT-Gas), a Joint Venture among three famous petroleum groups: Vietnam Oil and Gas Group (PVN), Total Outre Mer (France) and PTT Public Company (Thailand) was
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Lin, Wen-Yen, and 林文彥. "Performance Improvement of MPEG over ATM Networks using Shaper and Feedback-Controlled Priority Partition Scheme." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/71356191338342337814.

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碩士<br>國立中央大學<br>電機工程學系<br>85<br>MPEG over ATM has become an interesting topic in the literature , Many applications such as, Video on Daemon , Video Conference and Distance Learning had getting more and more popular in the future , However ,the traffic of MPEG video is bursty , it will cause conguestion of ATM networks ,So we propose a feedback-controlled priority partition scheme to scale priority-percentage dynamically and quality ,for reduce the burstiness of
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