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Weicker, Phillip J. "A parameterized, sensitivity-driven EM design environment /." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82643.
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This thesis deals with the application of sensitivity analysis to a variational geometry environment for the optimization of the design of electromagnetic devices. Through a graphical user interface, an electromagnetic device is sketched in a free-hand manner. The device topology is stored in a parameteric fashion. The sketch provides the topology (geometric entities and their interconnection) and defines the device, where changing the parameters provides all the possible devices under consideration. The performance of the device is computed using a commerical finite-element package. The effect of changing the system parameters on the device performance is investigated and used to modify the device to change the performance in the desired way. Significant gains in optimization performance are realized through the use of deterministic optimization techniques.
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Sridhar, Nigamanth. "Dynamically reconfigurable parameterized components." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078930623.
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Thesis (Ph. D.)--Ohio State University, 2004.Title from first page of PDF file. Document formatted into pages; contains xv, 147 p.; also includes graphics. Includes abstract and vita. Advisors: Paolo A.G. Sivilotti and Bruce W. Weide, Dept. of Computer and Information Science. Includes bibliographical references (p. 140-147).
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Singh, Aakash Narender, and Vijay Govindharajan. "Automated generic parameterized design of aircraft fairing and windshield." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-75858.
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The process of design is time consuming and result oriented. There is always a better scope for any design that reduces the time with better precision. Considering this as a major factor during design process, two of the vital parts of the aircraft conceptual design are taken into account where a lot of time can be saved. Major components considered in this work are fairings for the lift generating surfaces and cockpit windshield. In this work the major inference is to reduce the time spent on the initial conceptual design. The two components designed in this work are fairings and windshield. The fairing design in this work provides a flexible template which can be used for various fuselage and wing configurations for transport aircrafts. The windshield is classified into two types in this work, flat and blend windshield. Both the type of windshields can be implemented on appropriate fuselage. Both the components are designed to be implemented in single pilot as well as double pilot aircrafts. They also have parameters which can be modified according to the user requirement. The changes in the parameters provide the change in shape, size and volume of the components. The software used for this is CATIA V5. The process is carried out using two automation methods available in CATIA namely Power-Copy and Knowledge pattern. A comparison between the effectiveness of two automation methods used in this work is performed.
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Uebelhart, Scott Alan 1975. "Non-deterministic design and analysis of parameterized optical structures during conceptual design." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/39598.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2006.Includes bibliographical references (p. 261-272).
The next generation of space observatories will use larger mirrors while meeting tighter optical performance requirements than current space telescopes. The spacecraft designs must satisfy the drive for low-mass, low-cost systems, and be robust to uncertainty since design validation will be based on analysis instead of pre-launch tests. Analytical techniques will be required to identify which technologies or structural architectures are most appropriate to meet conflicting system requirements, but traditionally, model-based dynamic analysis would only take place after a single point design is chosen. The challenges facing future space telescopes require a new approach to conceptual design, and motivate the creation of design tools to identify superior, robust designs earlier in the design lifecycle using model-based analysis methods. A conceptual design methodology is proposed, in which both nominal performance as well as robustness to uncertainty are evaluated across multiple design realizations. A modeling environment is created so that for any set of design variables, such as mirror architecture or dimensions of the spacecraft, a finite element model is automatically generate and analyzed.
(cont.) A frequency-based dynamic analysis is performed for each design realization using integrated disturbance-to-performance models that include control systems and vibration isolators. Next, the uncertainty in early stages of design is considered and Design of Experiments tools such as the analysis of variance are used to identify critical uncertainty parameters. Lastly, parametric uncertainties are propagated through the model to bound the outputs. Aspects of this methodology are applied to several telescopes in order to demonstrate the practicality of this approach in real-life design studies. Critical uncertainty parameter identification and uncertainty analysis tools are applied to the Terrestrial Planet Finder interferometer. A parameterized model is prepared and a trade-space analysis performed for the ground-based Thirty Meter Telescope. Finally, the methodology as a whole is applied to a new space telescope design employing lightweight mirrors and a segmented aperture. An exploration of the design space is followed by uncertainty evaluation of the optimal designs. Over 1200 unique design realizations are evaluated, and the architecture families that provide the best performance and robustness to uncertainty are identified.
by Scott Alan Uebelhart.
Ph.D.
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Endicott, Giles E. "Achieving speedup of design optimization by predicting parameterized aerodynamic simulations." Thesis, University of Southampton, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536363.
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DIAZ, RUBEN GOMEZ. "A SYSTEM FOR GENERATION OF PARAMETERIZED MODELS FOR VESSELS DESIGN." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14888@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOEste trabalho situa-se numa das linhas de pesquisa da PUC-Rio de projeto de unidades flutuantes tais como, navios e plataformas semi-submersíveis. Nesta linha de pesquisa estão sendo desenvolvidos os programas gráficos MG (Mesh Generator) e o Sstab. O primeiro programa é um modelador geométrico por meio de seções transversais e gerador de malhas para modelos de estruturas flutuantes. O segundo programa é utilizado para a análise de estabilidade estática dos modelos gerados pelo MG. Este trabalho propõe um ambiente integrado de modelagem e de análise estática e dinâmica de estruturas flutuantes. O principal diferencial deste ambiente está no fato de possibilitar a geração automática de variantes de um determinado modelo padrão, a fim de atingir uma configuração desejada, seja no aspecto geométrico ou com relação a sua estabilidade estática. Este ambiente faz uso da linguagem Lua e é possível definir variáveis globais para serem utilizadas como parâmetros de modelagem que extraem, ou modificam, dados como comprimento, largura, altura etc. É possível parametrizar um modelo qualquer, em função de variáveis escolhidas pelo usuário, o que possibilita uma modelagem automática, com a variação de alguns destes parâmetros. Foram ainda desenvolvidas algumas ferramentas auxiliares que facilitam a modelagem de uma estrutura flutuante. Estas ferramentas verificam a consistência topológica de uma malha, gerar uma subdivisão gradativa das curvas cortadas e simplificar as novas malhas geradas. É possível também detectar se o modelo possui simetria num determinado plano e realizar, de forma automática, cortes do modelo final para diferentes calados.
This work is related to the PUC-Rio research area of vessel´s designs such as ships and semi-sub platforms. In this research area two softwares have been developed: MG and Sstab. The first is a geometric modeler based on cross sections and also on a mesh generator; the second is a software for the analysis of static and dynamic stability of MG models. This work proposes an integrated environment for modeling, and static and dynamic analysis of vessels. The main advantage of the proposed environment is that it is possible to obtain automatically variants of a specific model in order to achieve a desired configuration, not only in relation to geometry but also concerning the static stability aspect. This environment uses the Lua programming language and it is possible to define global variables to be used as parameters which retrieve or modify modeling values such as length, width, height, and so on. Any model can be parameterized, as a function of user chosen variables, which allows an automatic modeling with the variation of those parameters. There has been also developed some auxiliary tools which help the modeling of floating structures. Those tools verify the topological consistency of a mesh, generate a gradual subdivision of intersected curves and simplify the new generated meshes. They are also able to detect if the model has symmetry in relation to a certain plane, and sections can be automatically obtained according to different draughts.
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Malak, Richard J. Jr. "Using parameterized efficient sets to model alternatives for systems design decisions." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26697.
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Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2009.Committee Chair: Paredis, Christiaan J.J.; Committee Member: Bras, Bert; Committee Member: Choudhary, Ruchi; Committee Member: McGinnis, Leon; Committee Member: Rosen, David. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Dai, Lei. "An Open Platform of Parameterized Shape Optimization based-on CAD/CAE Integration Technique." Reims, 2006. http://theses.univ-reims.fr/exl-doc/GED00000752.pdf.
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The main content in the research is developing an open platform of parameterized shape optimization based-on CAD/CAE integration technique. Through integration, structural analysis and design optimization are seamless combined with parametric geometry modeling and embed into the CAD system. POSHAPE can provide parameterized shape optimization method for 3D solid structure, spatial shell structure and cell structure of composite material. To realize such a general method, integration is the most essential part. In this platform, integration is realized includes: 1) Integrating structure analysis tool of different disciplinary with structure shape optimization. Structure response from different disciplinary will be studied according structure shape. 2) Integrating finite element modeling with parametric geometry modeling through Boundary Representative Tree (simplified as: B-Rep) used in solid modeling. Finite element model is parameterized to be dynamic regenerated during optimization design steps. 3) Parametric solid modeling is extended to realize parameterized surface modeling under integration between surface model definition and solid model. Parameterized finite element modeling of shell structure is also achieved which is similar to that of solid structure
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Sohaib, Muhammad. "Parameterized Automated Generic Model for Aircraft Wing Structural Design and Mesh Generation for Finite Element Analysis." Thesis, Linköpings universitet, Maskinkonstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71264.
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This master thesis work presents the development of a parameterized automated generic model for the structural design of an aircraft wing. Furthermore, in order to perform finite element analysis on the aircraft wing geometry, the process of finite element mesh generation is automated. Aircraft conceptual design is inherently a multi-disciplinary design process which involves a large number of disciplines and expertise. In this thesis work, it is investigated how high-end CAD software‟s can be used in the early stages of an aircraft design process, especially for the design of an aircraft wing and its structural entities wing spars and wing ribs. The generic model that is developed in this regard is able to automate the process of creation and modification of the aircraft wing geometry based on a series of parameters which define the geometrical characteristics of wing panels, wing spars and wing ribs.Two different approaches are used for the creation of the generic model of an aircraft wing which are “Knowledge Pattern” and “PowerCopy with Visual Basic Scripting” using the CATIA V5 software. A performance comparison of the generic wing model based on these two approaches is also performed. In the early stages of the aircraft design process, an estimate of the structural characteristic of the aircraft wing is desirable for which a surface structural analysis (using 2D mesh elements) is more suitable. In this regard, the process of finite element mesh generation for the generic wing model is automated. The finite element mesh is generated for the wing panels, wing spars and wing ribs. Furthermore, the finite element mesh is updated based on any changes in geometry and the shape of the wing panels, wing spars or wing ribs, and ensure that all the mesh elements are always properly connected at the nodes. The automated FE mesh generated can be used for performing the structural analysis on an aircraft wing.
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Luo, Ping. "Design and Implementation of High Performance Algorithms for the (n,k)-Universal Set Problem." [College Station, Tex. : Texas A&M University, 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-7033.
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Bajay, Abel. "Identify customization, module opportunities for machines and parameterize the construction Case of the TransCent TCR loom." Thesis, KTH, Industriell produktion, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105739.
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Paper is one of the elements used in our everyday life under its different forms; from the office use, newspapers, books, post-it, different packaging… it is ever present. The mass production of paper is made possible today by the industrial paper mill. One of a key component affecting the quality of the paper is the forming fabric used as a filter in the preliminary stages of paper manufacturing. The TCR Transcent is such machine used to produce the forming fabric and TEXO-AB assures two third of the world production of the machine. Given the ever increasing customer demand, machine variants and technological need, it is imperial for TEXO-AB to implement a time-efficient and responsive design system. This is made possible by shifting from traditional design to a logic based parametric design. The TCR loom model provided by the method followed in this report allows among other benefit a reduction of up to 28% in the time taken to design a new machine while still attending to the customization element providing a unique machine for every customer. The use of the model will afford designers more time to focus on other essential tasks, schemes and strive toward continuous improvement in terms of quality and technology.
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LIN, GUO-DING, and 林國鼎. "Parameterized Design of LZ77 CODEC." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/33502704084690523178.
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碩士國立交通大學
電機與控制工程系
89
LZ77 is one of the most important compression algorithms in the field of data compression and telecommunication. To realize the algorithm on a single chip, the thesis proposes a Lampel-Ziv 77(LZ77) codec chip that features low-cost, high-speed, and parameterization. Since the LZ77 compression requires heavy comparison tasks, some of off-the-shelf LZ77 chips employ systolic array to implement the tasks. However, the systolic architectures are costly and require long latency. Hence, we proposes a CAM-based codec chip to reduce the cost and speed up the compression latency. In addition, the compression ratio of LZ77 is strongly depended on the parameters in terms of the size of dictionary and the length of comparison window. So, instead of applying a set of fixed parameters to the codec, we design a configurable chip that allows user to assign parameters for low compression ratio. As a result, the thesis uses a hybrid design flow, combined fully-custom and cell-based design flows, and 0.35 mm TSMC CMOS process to implement the codec.
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Chen, Wei-Kang, and 陳維剛. "The parameterized stadium frame structure design." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/09815510716605293682.
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碩士淡江大學
建築學系碩士班
101
A great similarity of appearance could be discovered between Pier Luigo Nervi’s Palazzetto Dello Sport and Norfolk Scope Arena through analysis. With the reinterpretation of Palazzetto Dello Sport and Norfolk Scope Arena in parametric design, the two famous gymnasiums has drawn out by the parameterization in Grasshopper and its plug-in. The first study focuses on parametric modeling of Palazzetto Dello Sport. With a simple change in parametric values, the transformation of the gymnasium has generated by geometry, column number, shape, structure, etc. Furthermore, the variation of stadium plane, perspective and structure are produced as the basis of analysis for the next operation. The second part of the study produces new gymnasiums which has generated different types of structure with the original Palazzetto Dello Sport in Grasshopper through the previous analysis. The architectural significance could be reinterpreted due to the proportion of structural difference; the consideration of real-function embedding with diversities of structural forming provides numerous imaginations of the stadium. Digital manufacturing has introduced to the third part in order to validate the construction of architecture in virtual computational space. First, using 3D Printer to fabricate real three-dimensional model; after a fast structure generation through LunchBox, the parametric plug-in, the structural units has produced by laser cutter and later accomplished with the assemblage. This has verified the feasibility of digital manufacturing; in addition, the workable structure could be re-inputted into computer for dissimilar stadium design. Every form could change its shape through a moderation of parametric adjustment. Parametric design breaks through the heretofore design thinking, and rapidly generates different forms in architecture within a short period of time, which could as well reinterprets the possibility of architectural design. With the express development of architectural design tools, the use of digitalization and parameterization could inspire the imagination and guides a conceptual blockbusting for architecture design in the future.
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Chang, Po-Yi, and 張伯毅. "Parameterized Optical Design of Asymmetrical Automobile Headlamp." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/g67772.
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碩士國立虎尾科技大學
機械與電腦輔助工程系碩士班
102
The proposed research provided an alternative approach to design an automobile headlamp base on the parameterized optical design. Differing from the traditional free form reflectors, this paper uses eight variable-focus-parabolic curves, in which each curve is determined by four parameters, construct a free form reflector. In order to obtain a certain light pattern (e.g. Europe ECE R112 regulations for automotive headlamps), sensitivity analysis is necessary to determine the relationship between the curves’ parameters and the certain light pattern. Base on the results of sensitivity analysis, we can tune the useful parameters to finally satisfy the requested light pattern. The validity of the final design is demonstrated by means of ZEMAX simulations. It is shown that the parameterized free form reflector design yields a significant improvement in efficency compared to conventional free form reflector design.
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Lai, Shiuan-Hung, and 賴宣宏. "Design of Arc-Length Parameterized NURBS Curve Interpolator." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/73988884066689176552.
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碩士國立交通大學
機械工程系所
97
Modern CNC systems are designed with the function of arbitrary parametric curves to save massive data communication between CAD/CAM and CNC systems and improve their machining quality. However, the computation loads of NURBS interpolator by numerical methods are relatively large. In this paper, a real-time NURBS motion command generator is presented; this method efficiently integrates the data processing of a NURBS path in a CNC controller, from pre-processing to real-time interpolation. The key point is to generate the arc-length parameterized NURBS curves, in the real-time NURBS path interpolation, the new setting path points can be calculated fast and directly using the arc-length parameterized NURBS curves without the need for any time-consuming computation of NURBS derivatives and iteration. The comparative results of different interpolation algorithms show that the mean-square feedrate deviation of the proposed method is the smallest among all algorithms. Furthermore, comparison of the average computing times of different algorithms show the excellent performance of the arc-length parameterized NURBS path interpolation method – using the same CPU clock, the proposed method is approximately five times faster. The proposed method is numerically stable and does not have the problems of error accumulation.
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Garris, Berle Jr. "Analysis and design of a parameterized protocol convertor." Thesis, 1985. http://hdl.handle.net/10945/21136.
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HSU, MIN-CHIEH, and 許旻傑. "Fully Parameterized Models and Optimal Design of Vehicle Brake Rotors." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/dfq9wx.
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碩士東南科技大學
機械工程研究所
107
This thesis investigates two types of automotive brake rotors, using ANSYS APDL codes to build fully parameterized models of the rotors and to perform modal analysis and optimizations achieving a completely automatic process from model building to optimum design. The codes, also integrated with an Excel VBA-based interface, is named BROS. Users simply enter values and select functions needed through the interactive interface and the rest from model building to optimum design is done automatically. BROS creates fully parameterized models of the rotors based on positional and functional relations of every key point of the models. Further, to facilitate automation, the program can accurately identify specific modes and generate a mode separation table in a 2-D array, in which the mode separation frequencies can be defined as the design variables and then realize mode-separation optimization can be realized. BROS presented in this research is the first version and it is expected to be upgraded in the future. This commencing edition has accomplished three goals: 1. Creating fully parameterized models; 2. Automatic identification of specific modes; 3. User selection of design variables when needed. Repeated tests and verifications have been performed to ensure the integrity of the software and it has been proven a very helpful tool for brake rotors design and research.
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Guo, Jiong [Verfasser]. "Algorithm design techniques for parameterized graph modification problems / von Jiong Guo." 2006. http://d-nb.info/981983995/34.
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Wang, Chun-Wei, and 王俊偉. "Parameterized Design of the Rotor Contact Zone for Twin-Screw Compressors." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/22882692694107887762.
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碩士國立屏東科技大學
機械工程系所
101
Critical core elements within a twin-screw compressor include a pair of mutually meshing screw rotors, whereas key factors of leakage paths and geometric characteristics that affect the performance of compressors include rotor tooth surface contact lines, leakage blowhole, trapped volumes, and tooth groove volumes. In this work, we will establish a mathematical model of rotor profile generation using the sealing line of the rotors, use quadratic equations to control the shapes of the various sealing sections, as well as apply constraints. Tooth profile for a pair of conjugate twin-screw rotors are derived according to coordinate transformtion and envelope theory. In addition, this work looks into the changes in clearance on the contact line with respect to the rotation angle of the male rotor during meshing operation, finds the contact zone on the contact line and establishes the polar expression. The radius of the contact zone control points and the pressure angles are used as design parameters for defining the contact zone curve equation. Furthermore, the effects of the geometric shape of the contact area on compressor performance indices are studied. The performance indices discussed in this work include compressor efficiencies, specific sliding, tooth diffrential contact force, and gas internal torque. The higher specific sliding and tooth diffrential contact force, the greater the wear on the tooth surfaces; the larger the variation in torque, the less stable the operation of the rotor (which could also be accompanied by relatively larger vibrations and noise). Therefore, this study looks into the trends of performance indices using contact zone line control parameters as design variables, thereby obtaining the effects of change in the geometric shape of contact zone on performance indices to serve as a reference for tooth design concerning sealing lines as well as a theoretic basis for the improvement of twin-screw compressor performance.
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Wu, Keng-Tang, and 吳肯唐. "Parameterized Design and Implementation of an Adaptive Multi-Symbol Arithmetic Coding Chip." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/26571656719482110767.
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碩士國立成功大學
電機工程學系
88
ABSTRACT In this paper, we present a VLSI design for adaptive multi-symbol arithmetic coding based on the analysis of the arithmetic coding parameters. These parameters include the binary and multi-symbol, the Markov model, the weighted history model, and the 2-dimensional state model etc. A new probability model scheme is then proposed, which provides more precise estimation of the symbol probability and uses less word length for Markov model memory, arithmetic units and registers. Besides, all the division operations are replaced by only one multiplication operation at the beginning of each coding process using a 121*12 bits ROM, and the difference of compression ratio compared to software division is less than 0.5%. A binary searching architecture for decoding is also presented, it searches the decoded symbol from 256 ones. The normalization process is partitioned into two parts and then pipelined efficiently. One is the parallel execution part; the other is not on the critical path, so that it can be done sequentially with less hardware. The decoding algorithm above is then implemented into a VLSI chip by using the high level synthesis design methodology based on a 0.35mm CMOS technology. The resulting chip occupies a silicon area of about 25 mm2, yielding a compression rate of 4.44 Mbits/sec with a clock rate of 33 MHz.
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Liou, Ming-Luen, and 劉明倫. "A Parameterized Module Design Framework and Its Application on Baseband Communication System Implementation." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/86849433537762498082.
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博士國立臺灣大學
電機工程學研究所
90
Rapid advancement in VLSI technologies makes the System On Chip (SOC) design feasible. EDA industry tries to build a tool chain that makes the transition from the top-most system level description to detail design smoothly. Tools such as integrated design environments and enhanced design methodologies, have been proposed to achieve chip design/verification routines with very high complexity. The design and simulation of the baseband transceiver is rucial in the whole system design. Currently most system design tools/languages are not dedicated for datapath/baseband system. While the design of datapath/baseband systems possesses distinctly features. In this thesis we propose a framework of datapath system design. This framework consist of three pillars: (1) Cycle-based C++ model that follows a system design/simulation methodology. With constraints in coding style we directly map a C++ code segment to a specific hardware implementation. (2) Parameterized module library that is used for synthesizing the C++ model and datapath netlist. (3) When the system design is done, we map the C++ design to connected modules, and synthesize the gate-level netlist directly using the module generators. Moreover, the tools quickly estimate design characteristics that makes designers easy to determine a preferable architecture in an earlier design stage. (3) Cell library that is used for physical design. We describe the usage of the cycle-based C++ model, show the design/implementation detail of the parameterized module design framework, give the examples of the parameterized module generators, and perform the design-space exploration based on the module library. Beside the design considerations and the implementation of the framework, we provide several module-level and two chip-level design examples to show the feasibility and outstanding features of the proposed design framework. According to the examples we conclude this design framework is a fast, robust, and cost-effective solution to high-complexity datapath/baseband signal processing system design.
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Liu, Chin-Chi, and 劉晉吉. "Parameterized Design and Chip Implementation of a Wavelet Based Progressive Image Coding System." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/28717159271226037090.
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碩士國立成功大學
電機工程學系
88
In this thesis, we focus on the system design and chip implementation of a progressive image coding system. The input images are decorrelated through the DWT, which is constructed by the lifting scheme, and then the hardware-optimized SPIHT (HO-SPIHT) algorithm encodes the wavelet coefficients efficiently. At the first part of this thesis, we study the theory of DWT and the second generation wavelets, i.e., the lifting scheme. Then, we modify the original SPIHT algorithm [SAI96A] to a hardware-optimized version and realize it on the PC platform. In addition, we compare the coding results of our system with other compression schemes. In the second part, we present an efficient VLSI architecture for the progressive image coding system. Our proposed VLSI architecture for the lifted DWT is with advantages of lower implementation complexity, faster computation time, and the inverse DWT with the same architecture as the forward. In addition, we propose a novel architecture to perform the HO-SPIHT algorithm. Our VLSI design is modular and parameterized scalable, and can easily be extended for different levels of wavelet decomposition and different sizes of input images. Finally, the proposed VLSI architecture is described in Verilog HDL, synthesized by the Synopsys Design Compiler, and verified by the Cadence Verilog-XL simulator. The chip is designed in a 0.35 mm 1P4M CMOS technology.
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Wu, Yin-Hann, and 吳盈翰. "Optimizing the Parameterized Hull Form Design Base on the Technology of Network Computing." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/fc3g69.
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碩士國立成功大學
造船及船舶機械工程學系
90
The conceptual design of optimal ship hull forms involves investigating the effects of hull geometry variations on hydrodynamic performance characteristics. The selection of the principal dimension and hull form parameter involves the hydrodynamic performance. In the ship design processes, generate hull form to get offset table data by selecting the principal dimension and hull form parameter. However, traditional hull form design which ship designer complete design is compact and difficult. Due to the high-speed development in information technology and internet, designers use new technology to improve the information management of the conceptual design. An easily accessed hull form design database containing performance data on a wide range of previous designs can shorten the time required during early stage design to achieve the hydrodynamic performance goals of a given design. So in this Project, we try to apply network computing improve traditional hull form design. A survey of existing and proposed hull form design systems worldwide suggests that the development of standardized neutral formats for digital data exchange would greatly improve the ship designer’s access to a wide range of existing hull geometry/ship performance data. Analysis Fourier Descriptor to improve hull geometry and ship performance .Using XML Standard for store hull geometry/ship performance data into hull form database. We express the same application will be extended to share design knowledge at anytime in anywhere.
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Wei-TingChen and 陳威廷. "Topology Optimization Based on Parameterized Level Set Method for Design of an Adaptive Compliant Gripper." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/p272v4.
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碩士國立成功大學
機械工程學系
107
This study presents a level set based topology optimization method to design an adaptive compliant gripper with maximum mechanical advantage. The adaptive compliant gripper is a compliant mechanism which can be used in handling of fragile objects with size and shape variations. The mechanical advantage is defined as the ratio of output force to input force. For a same input force condition, a higher mechanical advantage implies a larger output force, which leads to a higher payload for the compliant gripper. A parameterized level set method is used to perform topology optimization, which is with the advantages such as having smoother structural boundaries and a black and white design without gray elements. A hinge free method is used to minimize the de facto hinge problem, and a material removal scheme is proposed to speed up the numerical computation process. The classical benchmark problems in topology optimization literature including inverter mechanism and crunching mechanism are used as the verification examples to demonstrate the effectiveness of the proposed numerical method. The objective functions including mechanical advantage, geometric advantage, and a strain energy based function are used in this study. The proposed method is used to design the compliant gripper. Five analysis cases are performed, and an optimal design is identified according to the design rules and the results from finite element simulation. A compliant gripper module including actuator and 3D printed compliant fingers is prototyped then mounted on a six-axis industrial robot for grasping test. The test results show the developed compliant gripper can grip unknown objects with the size up to 141mm, and the maximum payload is 2.5 kg. The proposed motor-driven compliant gripper can be used to resolve the challenging issue for robotic automation of irregular and fragile objects, as well as to increase the productivity and reduce the cost for industrial automation.
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Daniel, Luca, and Jacob K. White. "Automatic Generation of Geometrically Parameterized Reduced Order Models for Integrated Spiral RF-Inductors." 2003. http://hdl.handle.net/1721.1/3879.
Full textAbstract:
In this paper we describe an approach to generating low-order models of spiral inductors that accurately capture the dependence on both frequency and geometry (width and spacing) parameters. The approach is based on adapting a multiparameter Krylov-subspace based moment matching method to reducing an integral equation for the three dimensional electromagnetic behavior of the spiral inductor. The approach is demonstrated on a typical on-chip rectangular inductor.Singapore-MIT Alliance (SMA)
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Liu, Yang. "Measure-Driven Algorithm Design and Analysis: A New Approach for Solving NP-hard Problems." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-7010.
Full textAbstract:
NP-hard problems have numerous applications in various fields such as networks,
computer systems, circuit design, etc. However, no efficient algorithms have
been found for NP-hard problems. It has been commonly believed that no efficient algorithms
for NP-hard problems exist, i.e., that P6=NP. Recently, it has been observed
that there are parameters much smaller than input sizes in many instances of NP-hard
problems in the real world. In the last twenty years, researchers have been interested
in developing efficient algorithms, i.e., fixed-parameter tractable algorithms, for those
instances with small parameters. Fixed-parameter tractable algorithms can practically
find exact solutions to problem instances with small parameters, though those
problems are considered intractable in traditional computational theory.
In this dissertation, we propose a new approach of algorithm design and analysis:
discovering better measures for problems. In particular we use two measures instead of
the traditional single measure?input size to design algorithms and analyze their time
complexity. For several classical NP-hard problems, we present improved algorithms
designed and analyzed with this new approach,
First we show that the new approach is extremely powerful for designing fixedparameter
tractable algorithms by presenting improved fixed-parameter tractable algorithms
for the 3D-matching and 3D-packing problems, the multiway cut problem, the feedback vertex set problems on both directed and undirected
graph and the max-leaf problems on both directed and undirected graphs. Most of
our algorithms are practical for problem instances with small parameters.
Moreover, we show that this new approach is also good for designing exact algorithms
(with no parameters) for NP-hard problems by presenting an improved exact
algorithm for the well-known satisfiability problem.
Our results demonstrate the power of this new approach to algorithm design and
analysis for NP-hard problems. In the end, we discuss possible future directions on
this new approach and other approaches to algorithm design and analysis.
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Yeh, Li-Ting, and 葉力廷. "A Parameterized and Dynamic Pipelined Low-Power Transform IP Core Design and Its Performance Analysis Platform." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/13299032388972450627.
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Lee, Ji-Tai, and 李基泰. "The Design and Implementation of Parameterized Soft IP module for Channel Codec in Third Generation Mobile Communications." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/19484826308714740648.
Full textAbstract:
碩士南台科技大學
電子工程系
93
Due to the fast developments in wireless communications and digital information technology in recent years, there gets an increasing demand for accessing to gigantic amounts of data anytime and anywhere. To maintain the quality of service (QoS) or vice versa to improve the performance for given transmission consideration, channel coding plays a key element of any digital wireless communications system as it reduces the effects of noise and interference on the signal transmission. As a result, in third generation (3G) mobile wireless communications standards, offering two channel coding schemes, convolutional coding and Turbo coding for multimedia services transmission. This thesis presents a programmable and flexible soft IP design of a dual-mode Viterbi/Turbo channel coding for 3G mobile wireless communication systems such as CDMA2000 and WCDMA. Further, by merging some similar circuit units in both convolutional and Turbo codec architecture, a dual-mode reusable and parameterized IP for forward error correction kernel applied to 3G communications is implemented. With the proposed reconfigurable and reusable IP, adaptive design and rapid implementation are available for different mobile wireless communication systems just by way of specified parameters tuning, for example, code rate (1/2~1/4), constrain length (3~10) and trace back (1~64), etc., via user-friendly GUI to generate the associated HDL codes for hardware implantation. Moreover, the efficiency of proposed dual-mode IP-based channel codec for 3G communications has been verified with Altera FPGA platform.
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Lin, Chien Chang, and 林建璋. "A Parameterized Silicon IP Design and Realization for the 1-D Variable Length Discrete Fourier Transform Using Block-based Distributed Arithmetic." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/16838955036008620805.
Full textAbstract:
碩士國立中正大學
資訊工程研究所
91
This thesis presents the IP design and implementation of a parameterized hardware design for the one dimension (1D) discrete Fourier transform (DFT) with variable lengths. By combining the cyclic convolution formulation, block-based distributed arithmetic (BDA), and Cooley-Tukey decomposition algorithm together, we have developed a parameterized hardware design for the DFT of variable lengths ranging from 256 to 4096 points and with different modes of performance. The proposed design can perform different lengths of DFT computation through the configuration of parameters, which not only provides the flexibility in computing different length DFT but also facilitates the performance-driven design considerations in terms of power consumption and processing speeds. That is, we can configure the proposed design in different modes of performance by setting different parameters. This feature is beneficial to developing a parameterized DFT soft Intellectual Property (IP) core or hard IP core for meeting the system requirements of different silicon-on-a-chip (SOC) applications as compared with the existing fixed length DFT designs. This paper is organized as follows. We first introduce our motivation and the related research in Chapter 1 and Chapter 2. Then, we will illustrate the proposed algorithm, including cyclic convolution, Cooly-Tukey decomposition, CORDIC algorithm, and BDA computation technique in Chapter 3. And we describe the hardware design, implementation, and verification of 1D long-length DFT IP core in Chapter 4. In Chapter 5 and Chapter 6, we analyze the data precision of the proposed design due to finite word-length effect and its performance on different modes. Finally, we conclude this work in Chapter 7.
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Parker, Robert Reed. "Technology Characterization Models and Their Use in Designing Complex Systems." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9259.
Full textAbstract:
When systems designers are making decisions about which components or technologies to select for a design, they often use experience or intuition to select one technology over another. Additionally, developers of new technologies rarely provide more information about their inventions than discrete data points attained in testing, usually in a laboratory. This makes it difficult for system designers to select newer technologies in favor of proven ones. They lack the knowledge about these new technologies to consider them equally with existing technologies. Prior research suggests that set-based design representations can be useful for facilitating collaboration among engineers in a design project, both within and across organizational boundaries. However, existing set-based methods are limited in terms of how the sets are constructed and in terms of the representational capability of the sets. The goal of this research is to introduce and demonstrate new, more general set-based design methods that are effective for characterizing and comparing competing technologies in a utility-based decision framework. To demonstrate the new methods and compare their relative strengths and weaknesses, different technologies for a power plant condenser are compared. The capabilities of different condenser technologies are characterized in terms of sets defined over the space of common condenser attributes (cross sectional area, heat exchange effectiveness, pressure drop, etc.). It is shown that systems designers can use the resulting sets to explore the space of possible condenser designs quickly and effectively. It is expected that this technique will be a useful tool for system designers to evaluate new technologies and compare them to existing ones, while also encouraging the use of new technologies by providing a more accurate representation of their capabilities. I compare four representational methods by measuring the solution accuracy (compared to a more comprehensive optimization procedure's solution), computation time, and scalability (how a model changes with different data sizes). My results demonstrate that a support vector domain description-based method provides the best combination of these traits for this example. When combined with recent research on reducing its computation time, this method becomes even more favorable.