Dissertations / Theses on the topic 'Configurations of Mechanisms'
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Jensen, Brian D. "Identification of Macro- and Micro-Compliant Mechanism Configurations Resulting in Bistable Behavior." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/83.
Full textAlfattani, Rami. "Design of Shape-Morphing Structures Consisting of Bistable Compliant Mechanisms." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7725.
Full textCerminara, Adriano. "Boundary-layer receptivity and breakdown mechanisms for hypersonic flow over blunt leading-edge configurations." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/412641/.
Full textHabib, Farooq. "Interplay between network configurations and network governance mechanisms in supply networks a systematic literature review." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7879.
Full textOzdemir, Mustafa. "Inverse Dynamics Control Of Parallel Manipulators Around Singular Configurations." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609212/index.pdf.
Full textFerrigno, Giulio. "Strategic alliances: value creation and appropriation mechanisms, configuration, and portfolio evolution." Doctoral thesis, Università di Catania, 2018. http://hdl.handle.net/10761/3863.
Full textHabibi, Rabeb. "Les mécanismes de performance de la diversification des business models : une analyse QCA des compagnies aériennes." Electronic Thesis or Diss., Université de Lille (2022-....), 2024. https://pepite-depot.univ-lille.fr/ToutIDP/EDSJPG/2024/2024ULILD020.pdf.
Full textDespite the growing number of companies deploying multiple Business Models simultaneously, few studies have explored the link between Business Model diversification and performance. The objective of this thesis is to study this relationship by examining the underlying mechanisms. Using data from the global airline industry, we conducted eighteen QCA analyses and documented the choices related to the mechanisms of exploiting synergies and reducing anti-synergies within airlines that simultaneously operate a low-cost Business Model and their original full-service Business Model. The deployment of a configurational approach allowed us to identify the configurations of mechanisms explaining both performance and high performance in a portfolio of Business Models. Our results suggest that the mechanisms for exploiting synergies and reducing anti-synergies are complementary and interdependent. Contrary to what some research suggests, it emerges that the exploitation of resource-related synergies alone is not sufficient to explain the performance of Business Model portfolios. Furthermore, our results reveal a divergence in the combinations of mechanisms for exploiting resource-related synergies. Meanwhile, our results did not reveal a significant difference between short-term and medium-term mechanism configurations. Additionally, the analysis of typical and deviant cases allowed us to identify a new typology of synergies and anti-synergies that considers the temporal and interactional dimensions of these mechanisms. The contributions of the thesis highlight the equifinal, non-linear and asymmetric nature of the configurations of mechanisms explaining the performance of Business Model portfolios
Williams, Robert L. "Planar robotic mechanisms: analysis and configuration comparison." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/54462.
Full textPh. D.
Pohl, Eric David. "Analysis of singular configurations for robotic manipulators." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/18368.
Full textHanna, Brandon Holbrook. "Modeling and Testing of Bistable Waterbomb Base Configurations." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4336.
Full textSong, Jiwen. "Organizational control mechanisms and employee outcomes : processes and configuration /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MGTO%202005%20SONG.
Full textZhu, Ting 1971. "Atomistic characterization of stress-driven configurational instability and its activation mechanisms." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/17954.
Full textIncludes bibliographical references (p. 145-156).
Cleavage decohesion and shear dislocation nucleation are two basic modes of localized deformation in crystal lattices, which normally result from instability of the atomic configuration driven by mechanical forces. The critical state of instability and its thermal activation mechanisms can be quantitatively determined by analyzing the energetics of the lattice system. In this thesis, the unit processes of configurational instability of crystal lattices under various non-uniform structural and/or chemical environments are characterized by systematically probing the atomistic potential energy landscape of each system using the state of the art configurational space sampling schemes. The problems studied are homogeneous dislocation nucleation in a perfect crystal by nanoindentation, dislocation emission and cleavage decohesion at atomically sharp crack tips, and chemically-enhanced bond breaking in a wet silica nanorod. These processes are studied in a unified manner such that two important types of properties are determined: one is the athermal load at which the instability takes place instantaneously without the aid of thermal fluctuations, and the other is the stress-dependent activation energy used for an estimate of the kinetic rate of transition. Along the way, important aspects concerning the atomistic characterization of configurational instability are revealed. Of particular note is extending the continuum instability criterion to detect atomic defect nucleation. We demonstrate that a local instability criterion can be applied to identify dislocation nucleation in the case of indentation, considering that the relatively small strain gradient beneath the indenter will lead to a mode of long wavelength phonon instability suitable for a study
(cont.) by the local continuum approach. In addition, the chemical effect on stress-driven lattice instability is revealed via the study on reactivity of a silica nanorod with water. We identify distinct competing mechanisms of hydrolysis which are rate-controlling at different load regimes. The ensuing stress-mediated switch of rate-limiting steps of hydrolysis quantitatively demonstrates the impact of finding the detailed molecular mechanisms on a realistic estimate of the activation rate when configurational instability occurs within a chemically reactive environment. Implications regarding the analysis of chemically-assisted brittle fracture are also discussed.
by Ting Zhu.
Ph.D.
Gavelin, Anders. "Studies on structural and biomechanical responses in seat integrated safety belt configurations." Doctoral thesis, Luleå, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26683.
Full textGodkänd; 2008; 20080404 (ysko)
Li, Wei. "The dynamics of perfect steering bogie vehicles and its improvement with a reconfigurable mechanism." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/25488.
Full textVernon, Russell A. "Discovering optimal unit cell configurations when designing for additive manufacturing using lattice structures." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10108174.
Full textAccording to Wohlers Report 2014, the worldwide 3D printing industry is now expected to grow from $3.07B in revenue in 2013 to $12.8B by 2018, and exceed $21B in worldwide revenue by 2020. With 3D printing rapidly evolving from a prototype commodity to a means to produce full production items, lattice structures are becoming of great interest due to their superior structural characteristics and lightweight nature. Within design, lattice structures have typically been defined by preset beam configurations within a cube. Certain configurations have been proven analytically to be optimal for certain load functions, but never has there been optimization performed to discover or verify the optimal lattice shapes and sizes within a predefined cubic space. By performing optimization on these cubic cells, a design guideline can be created for designers of lattice structures. In this thesis, several lattice configurations are analyzed both from a micro level (single unit cell) as well as a macro level (a simple series of unit cells). Optimization is performed with respect to stiffness and compliance to identify strategic configurations for bending, torsion, compression and tension. Only cubic base cells are analyzed (i.e. no hexagonal). Knowing optimal lattice configurations from a structural standpoint enables designers to further reduce weight and increase structural efficiencies when designing for additive manufacturing. The results of this study yield a well-defined guideline for design engineers to utilize when lattice structures are incorporated in a structural design. With this design guideline information available to design engineers, further utilization of lattice structures can be exploited by efficiently applying strategic unit cell configurations to the overall design.
Grudić, Gregory Z. "Iterative inverse kinematics with manipulator configuration control and proof of convergence." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/42018.
Full textApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Hao, Jingyan [Verfasser]. "Araneiform terrain on Mars — spatial configuration and mechanism of formation / Jingyan Hao." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1219904821/34.
Full textAvén, Joakim. "Analysis of the Z-wing configuration." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-12135.
Full textMjöberg, Mårten, and Axel Stenfors. "CPTu Configuration Impact on Evaluated Undrained Shear Strength." Thesis, KTH, Jord- och bergmekanik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279465.
Full textI detta examensarbete utvärderas den vanligt förekommande geotekniska sonderingsmetoden CPTu, på hur olika konfigurationer av sonder påverkar den resulterande utvärderade odränerade skjuvhållfastheten i lösa leravlagringar, 9i jämförelse med varandra och med laboratoriemetoder. Detta är genomfört genom fältundersökningar på Lindefältet, Södermanlands län. Jämförelsen gjordes på de två svenska CPTu-tillverkarnas sonder. Detta är gjort med hänsyn till olika kalibreringar av konspetstryck, filtertyper, och huruvida sonden har varit överlastad påverkar den utvärderade skjuvhållfastheten som registreras. De huvudsakliga slutsatserna är att en av tillverkarnas sonder registerar udda värden i en konfiguration, att kalibreringar av konspetstryck har en märkbar påverkan på de resulterande värdena på utvärderade odränerade skjuvhållfastheten, samt att överlastning av sonder och val av filtertyp har liten till omärkbar påverkan på resultatet.
SONG, NAN, and JINPING ZHU. "Knowledge transfer and global R & D operations within MNC." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-19605.
Full textMarcos, Jay M. "Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1099.
Full textPousse, Alexandre. "Le quasi-satellites et autres configurations remarquables en résonance co-orbitale." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEO006/document.
Full textThis work of thesis focuses on the study of the coorbital resonance. This domain of particular trajectories, where an asteroid and a planet gravitate around the Sun with the same period possesses a very rich dynamics connected to the famous Lagrange’s equilateral configurations L4 and L5, as well as to the Eulerian’s configurations L1, L2 and L3. A major example in the solar system is given by the “Trojan” asteroids harboured by Jupiter in the neighborhood of L4 and L5. A second astonishing configuration is given by the system Saturn-Janus-Epimetheus; this peculiar dynamics is known as “horseshoe”. Recently, a new type of dynamics has been highlighted in the context of co-orbital resonance: the quasi-satellites. They correspond to remarkable configurations : in the rotating frame with the planet, the trajectory of the asteroid seems the one of a retrograde satellite. Some asteroids harboured by Venus, Jupiter and the Earth have been observed in this kind of configuration. The quasi-satellite dynamics possesses great interest not only because it connects the different domains of the co-orbital resonance (see works of Namouni, 1999), but also because it seems to bridge the gap between satellization and heliocentric trajectories. However, despite the term quasi-satellite has become dominant in the celestial mechanics community, some authors rather use the term “retrograde satellite”. This reveals an ambiguity on the definition of these trajectories. For these reasons, the first part of this thesis consisted in clarifying the definition of these orbits by revisiting the planar-circular case (planet on circular motion) in the framework of the averaged problem. In the second part of this thesis, we developed an analytic method to explore the quasi-satellite domain in the averaged problem. We realized this exploration in the planar-circular case and proposed an extension to the planar-eccentric and spatial-circular cases. The recent discoveries around the exo-planets motivated some works on the co-orbital resonance in the planetary Three-Body Problem. In this context, Giuppone et al. (2010) highlighted (numerically) the quasi-satellite as well as new families of remarkable configurations: the “anti-Lagrange”. Then the third part of this thesis presents an analytical method for the planetary problem that allows to reveal the anti-Lagrange orbits as well as a sketch of study of quasi-satellite trajectories
Maurini, Corrado. "ELECTROMECHANICAL COUPLING OF DISTRIBUTED PIEZOELECTRIC TRANSDUCERS FOR PASSIVE DAMPING OF STRUCTURAL VIBRATIONS: COMPARISON OF NETWORK CONFIGURATIONS." Phd thesis, Virginia Tech, 2002. http://tel.archives-ouvertes.fr/tel-00994396.
Full textOh, Yoonchan. "Multi-physics investigation on the failure mechanism and short-time scale wave motion in flip-chip configuration." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2719.
Full textHazelton, William Donald. "Configuration mixing of quark states in nucleons and other baryons in the MIT bag model /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9770.
Full textMalvezzi, Fernando. "Avaliação do comportamento cinemático de um mecanismo paralelo tridimensional." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-08012008-085930/.
Full textThis dissertation proposes a novel three-degree-of-freedom parallel kinematic structure in order to be applied as a three-dimensional robot manipulator. The volume of the available workspace is employed as a performance index to evaluate the kinematic behavior of the mechanism. The position and velocity kinematics are developed for mapping singular configurations and evaluating the workspace. The results obtained by performing the direct and inverse kinematics are compared in order to verify the consistency between them. It is demonstrated that most of singular configurations is represented by the alignment of the links that belong to each active chain. In addition, a family of singularities for one of the active chains is presented. The volume of the workspace is calculated by using the discretization method not only for evaluating the feasible workspace but also for identifying the influence of dimensional parameters with respect to this volume. The achieved workspace by employing the optimal parameters is comparable to that reached by conventional robot manipulators.
Bchir, Lahsen. "Etude theorique et experimentale d'un moteur eolien darrieus : application a l'entrainement de pompes solenoides dans diverses configurations." Paris 6, 1988. http://www.theses.fr/1988PA066046.
Full textDelerba, Frédéric. "Modélisation géométrique et mécanique tridimensionnelle du rachis thoracique et lombaire en configuration de choc automobile." Phd thesis, Paris, ENSAM, 2001. http://tel.archives-ouvertes.fr/tel-00005772.
Full textCezar, Henrique Musseli. "Implementação e desenvolvimento de algoritmo eficiente para deformação intramolecular com o método Monte Carlo." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-19102018-165856/.
Full textWith the increase of computational power in the last decades, the molecular modeling of problems in several areas has become more accessible, being today a fundamental tool used to understand several processes. In particular, molecular simulations with classical force fields have been important for the sampling of thermodynamic properties, for the determination of structures and population of conformers, and for the selection of configurations to be used with methods that combine quantum mechanics with molecular mechanics. The most common simulation methods used nowadays are molecular dynamics (MD) and Monte Carlo (MC). Both methods are in principle equivalent when the goal is configurational sampling, with MD having the advantage of allowing the analysis of the dynamics and temporal evolution, while MC has the advantage of generating the configurations in a probabilistic manner, not necessarily following a path in the potential energy surface, possibly resulting in a more efficient sampling. However, there is no MC methodology that can be considered efficient and established to sample the internal degrees of freedom of molecules with arbitrary complexity. In order to advance in the development of methods that want to achieve this goal, in this work the method presented by Shah e Maginn [1] has been implemented and improved. In the method, the molecule is fragmented into smaller parts, each one composed by the hard degrees of freedom, which do not vary dramatically during the simulation. Those fragments are then connected by soft degrees of freedom, the dihedral and non-bonded terms of the energy. During the simulation the molecule has some of its fragments deleted, and is reconstructed using a Configurational Bias Monte Carlo (CBMC) approach. The contribution of this work to the methodology is generalizing the fragment types within the method, the simplification of the acceptance criteria and some extensions with additional biases, such as electrostatic potential bias and the acceptance criterion of the preferential sampling with the CBMC. The implementation was evaluated through simulations in two simple systems: octane and 1,2-dichloroethane. Comparing the sampling and results obtained for the populations of conformers with MD results, experimental data or values obtained with different MC methods present in the literature, we verified that the implementation reproduces the expected results. Beyond that, the conformational equilibrium of the mesityl oxide (MOx) molecule which has two conformers: syn and anti, was investigated. Due to the potential energy barrier between the two conformers of about 10 kcal/mol, the MD does not perform an ergodic simulation, while the CBMC does the same sampling accordingly. In the CBMC simulation, the inversion of the dominant conformer in gas phase and water was observed. The MOx simulation in acetonitrile and methanol showed that the frequency of the anti conformer indeed increases with the solvent polarity. Nonetheless, due to the stretch of the C = O bond of MOx in methanol, attributed to the hydrogen bonds formed with the solvent, the conformational contribution to the maximum of the absorption band does not follow the polarity tendency, having a larger blue shift in acetonitrile than in methanol. The C = O bond stretch can only be seen because the Cartesian displacement sampling with the Metropolis method was introduced to the original CBMC method. This effect attributed to the stretch is compensated by the solvent, in a way that the total contribution to the transition energy follows the solvent polarity. In general, we conclude that the performance of the developed CBMC method is excellent to the studied cases, being even superior to MD in some cases. The implementation in DICE leaves an important legacy to several research groups, not only for introducing the CBMC method, but also due to general improvements such as parallelization, neighbor list and code modernization, which were introduced during the project.
Ballard, Andrew. "Kinetics and mechanism of H D exchange reactions and racemisation in aqueous solutions : configurational stability of ester and amide arylglycine derivatives." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/55130/.
Full textDa, Silva Veith Alexandre. "Quality of Service Aware Mechanisms for (Re)Configuring Data Stream Processing Applications on Highly Distributed Infrastructure." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN050/document.
Full textA large part of this big data is most valuable when analysed quickly, as it is generated. Under several emerging application scenarios, such as in smart cities, operational monitoring of large infrastructure, and Internet of Things (IoT), continuous data streams must be processed under very short delays. In multiple domains, there is a need for processing data streams to detect patterns, identify failures, and gain insights. Data is often gathered and analysed by Data Stream Processing Engines (DSPEs).A DSPE commonly structures an application as a directed graph or dataflow. A dataflow has one or multiple sources (i.e., gateways or actuators); operators that perform transformations on the data (e.g., filtering); and sinks (i.e., queries that consume or store the data). Most complex operator transformations store information about previously received data as new data is streamed in. Also, a dataflow has stateless operators that consider only the current data. Traditionally, Data Stream Processing (DSP) applications were conceived to run in clusters of homogeneous resources or on the cloud. In a cloud deployment, the whole application is placed on a single cloud provider to benefit from virtually unlimited resources. This approach allows for elastic DSP applications with the ability to allocate additional resources or release idle capacity on demand during runtime to match the application requirements.We introduce a set of strategies to place operators onto cloud and edge while considering characteristics of resources and meeting the requirements of applications. In particular, we first decompose the application graph by identifying behaviours such as forks and joins, and then dynamically split the dataflow graph across edge and cloud. Comprehensive simulations and a real testbed considering multiple application settings demonstrate that our approach can improve the end-to-end latency in over 50% and even other QoS metrics. The solution search space for operator reassignment can be enormous depending on the number of operators, streams, resources and network links. Moreover, it is important to minimise the cost of migration while improving latency. Reinforcement Learning (RL) and Monte-Carlo Tree Search (MCTS) have been used to tackle problems with large search spaces and states, performing at human-level or better in games such as Go. We model the application reconfiguration problem as a Markov Decision Process (MDP) and investigate the use of RL and MCTS algorithms to devise reconfiguring plans that improve QoS metrics
Олексієвич, Андрій Мирославович, and Andriy Oleksiievych. "Дослідження верстату пірамідальної компоновки на основі механізмів паралельної структури." Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2018. http://elartu.tntu.edu.ua/handle/lib/26996.
Full textМетою роботи є оцінка стану розвитку верстатів з механізмами паралельної структури та розробка їх нових конструкцій з покращеними технологічними можливостями. В дипломній роботі магістра здійснено аналіз розвитку компонувань верстатів з механізмами паралельної структури. Розглянуто основні способи формоутворення обробки поверхонь деталі типу «Корпус» та розроблено технологічний процес її виготовлення. Здійснено розробку компонування верстату пірамідальної компоновки, розроблено конструкції її основних вузлів. Здійснено дослідження кінематики механізмів паралельної структури. Розроблені практичні рекомендації по удосконаленню свердлильно-фрезерних верстатів з МПС. Запропоновані конструкції каркасних компоновок верстатів з МПС. Вирішені питання техніко-економічного обґрунтування прийнятих технічних рішень. Також розкриті питання охорони праці та безпеки в надзвичайних ситуаціях, екології.
Вступ; Аналітичний розділ; Оптимізація схем формоутворення на проектованому верстаті і оптимізація його компоновки; Вибір та обгрунтування вихідних даних на розробку верстатного обладнання. Технологічний розрахунок.; Проектування конструкції верстатного обладнання; Спеціальна частина; Науково-дослідний розділ; Обгрунтування економічної ефективності; Охорона праці та безпека в надзвичайних ситуаціях; Екологія ; Висновки.
Jarman, Ben. "Essays in optimal auction design." University of Sydney, 2008. http://hdl.handle.net/2123/4627.
Full textAuctions are an ancient economic institution. Since Vickrey (1961), the development of auction theory has lead to an extremely detailed description of the often desirable characteristics of these simple selling procedures, in the process explaining their enduring popularity. Given the pervasiveness of auctions, the question of how a seller should engineer the rules of these mechanisms to maximize her own profits is a central issue in the organization of markets. The seminal paper of Myerson (1981) shows that when facing buyers with Independent Private Values (IPVs) a standard auction with a specifically selected reserve price (or prices) is optimal, that is, maximizes a seller's expected profits among all conceivable selling mechanisms. In this model, it is assumed that the buyers have perfect information as to the existence of gains from trade. We shall argue that the consequences of this assumption for the design of the optimal auction are not well understood, which motivates our analysis. The three essays of this thesis relax the `known seller valuation' assumption by examining the optimal auction program when the seller (and principal) holds private information representing her reservation value for the good. In the first essay we provide an original technique for comparing ex ante expected profits across mechanisms for a seller facing N>1 potential buyers when all traders hold private information. Our technique addresses mechanisms that cannot be ranked point-by-point through their allocation rules using the Revenue Equivalence Theorem. We find conditions such that the seller's expected profits increase in the slope of each buyer's allocation probability function. This provides new intuition for the fact that a principal does not benefit from holding private information under risk neutrality. Monopoly pricing induces steep probability functions so the seller/principal benefits from announcing a fixed price, and implicitly her private information. An application is presented for the well known k double auction of the bilateral trade literature. In the second and third essays of this thesis, we extend the above framework to allow for informational externalities. Specifically, we allow for the situation in which the seller's private information represents a common value component in buyers' valuations. Thus the seller's private information (say regarding the quality of the good) is of interest to bidders independently of any strategic effects. In recent work Cai, Riley and Ye (2007) have demonstrated that a seller who holds private information about the quality of a good faces an extra consideration in designing an auction; the reserve price signals information to bidders. In a separating equilibrium signalling is costly in the sense that reserves are higher than would be optimal under complete information. We examine the returns to the seller in an English auction from using different types of secret reserve regimes. We find that immediate disclosure of a reserve is preferable to announcement after the auction in the form of a take-it-or-leave-it offer to the winning bidder. Sale occurs less often during the auction for a given reserve price strategy under secret reserve regimes, which increases the incentive for the seller to report more favourable information though the reserve price offer. Separating equilibria involving later announcement therefore generate even lower expected profits to the seller (signalling is more costly) than under immediate disclosure. In the third essay we compare the benchmark signalling equilibrium of immediate disclosure to a screening regime which we call the Right of Refusal. In this extreme form of a secret reserve the seller never announces the reserve price, she simply accepts or rejects the auction price. We find that the Right of Refusal dominates immediate disclosure if the seller's valuation is a sufficient statistic for the private information of interest. Thus a seller with market-relevant private preference information can benefit from not exercising monopoly price setting power. The result also provides conditions under which a competitive screening equilibrium is more efficient than a signalling mechanism. Broadly speaking, screening is better when the common value aspect in the preferences of the informed and uninformed parties are `aligned', and potential gains from trade to the uninformed party are significant. We believe this conclusion to be of particular interest to the design of privatization schemes.
Pain, R. "Simulation numérique, analyse physique et contrôle d'écoulements massivement décollés. Application au buffeting culot et à l'ovalisation de la tuyère sur des configurations de lanceur." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2013. http://tel.archives-ouvertes.fr/tel-01009854.
Full textPoling, Dana B. "Spherically-actuated platform manipulator." Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1172775949.
Full textAmbrozková, Anna. "Geometrické struktury a objekty z hlediska aplikací v mechanice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417093.
Full textKarakoc, Ali. "Multi-disciplinary Design And Optimization Of Air To Surface Missiles With Respect To Flight Performance And Radar Cross Sectio." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613903/index.pdf.
Full textBoutalib, Abderrahim. "Etude théorique de la surface de potentiel du système HO::(2) + H. : Influence de la corrélation électronique." Pau, 1986. http://www.theses.fr/1986PAUU3009.
Full textBuck, Dietrich. "Mechanics of Cross-Laminated Timber." Licentiate thesis, Luleå tekniska universitet, Träteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68729.
Full textExternal cooperation: Martinson Group AB and Research Institutes of Sweden (RISE)
BELLOSTA, DECHAVANNE VERONIQUE. "Contribution a l'etude de la reactivite de derives glucidiques vis-a-vis d'organometalliques : nouvelles syntheses stereospecifiques de c-glycosides." Paris 6, 1987. http://www.theses.fr/1987PA066256.
Full textWU, LONG-YONG, and 吳隆庸. "On the singular configurations of planar linkage mechanisms." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/60383199890501186363.
Full textLai, Ying-Ren, and 賴盈任. "Computational Studies of the Adsorption Configurations and Dehydrogenation Mechanisms of Ethanol on the Rh/γ-Al2O3(110) Surface." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47155491079969183630.
Full text國立臺灣師範大學
化學系
95
We applied periodic density-functional theory (DFT) to investigate the adsorption configurations and decomposition paths of ethanol on a Rh/γ-Al2O3(110) surface. Adsorption of ethanol onto a Al atom in the surface performs a larger adsorption energy than it adsorbed onto a Rh atom. But it is well known that the acidic support, γ-Al2O3 promotes dehydration of ethanol to ethylene. Therefore, we consider another ethanol adsorption configuration for the calculation of ethanol dehydrogenation pathways. In this configuration, ethanol adsorbed onto a Rh via α-cabon, two α-hydrogen atoms from ethanol are first eliminated; the barriers for abstraction of this two α-hydrogen atoms are calculate to be 2.59 and 7.35 kcal/mol, respectively. The dehydrogenation continues with the loss of one hydrogen from the O-H, forming an intermediate species CH3C(a)O + 3H(a), for which the successive barrier is 10.13 kcal/mol. Cleavage of the C-C bond occurs at this stage with a dissociation barrier Ea = 12.06 kcal/mol, to form C(a)H3 + C(a)O + 3H(a). The aforementioned reaction mechanism was also proposed and discussed by experiment.
Pan, Meng-Ching, and 潘孟青. "Computational Study on Decomposition Mechanisms of Cyanomidyl Radical with Doublet and Quartet Configurations, and the RCCN (R = H, F, Cl, Br, CN, NH2, CH3) Substituted Radicals React with NO." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/42451309249518944746.
Full text中國文化大學
應用化學研究所
99
The reaction mechanisms of (1) the decomposition reaction of cyanomidyl radical (HNCN), and (2) the reaction of RCCN (R=H, F, Cl, Br, CN, NH2, and CH3) radicals with the NO have been investigated by the highlevel ab initio molecular orbital method. The species involved have been optimized at the B3LYP/6-311++G (3df,2p) level and their singlepoint energies are refined by the CCSD(T)/aug-cc- PVQZ//B3LYP /6-311+G(3df,2p) method. For the HNCN decomposition reaction system with two different configurations (doublet and quartet states), our calculated results indicate that there exists two and three favorable paths for the formations of CH + N2. For doublet state case, these two paths are HNCN→TS1→IM4→TS4→ IM2→TS8→CH+N2, and HNCN→TS3→ IM1→TS2→IM2→TS8→CH+N2, respectively. For quartet state case, these three paths are R→TS4→IM5→TS5→IM2→TS7→IM3→TS12→ CH+N2, R→TS9→IM4→TS13→IM1→TS11→IM3→TS12→CH+N2, and R→TS4→IM5→TS10→IM1→TS11→ IM3→TS12 →CH+N2, respectively. In addition, employing the Fukui functions and HSAB theory we are able to rationalize the scenario of these calculated outcomes. For the reaction of RCCN (R=H, F, Cl, Br, CN, NH2, and CH3) radicals with the NO system, our calculated results clearly show that if the substituted RCCN are electron donating groups (for R = F, NH2 and CH3 cases), their corresponding barrier heights for transition states will be slightly decreased. The possible explanations for the decreased and/or increased energy barriers of the substituted RCCN are also analyzed in this part.
楊義成. "Mechanism configuration synthesis and." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/50861797216011162404.
Full textLiu, Nien-Te, and 劉念德. "Configuration Synthesis of Mechanisms with Variable Chains." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/15041717110972569961.
Full text國立成功大學
機械工程學系
89
Mechanisms can be classified into the following three types according to the topological structures: closed chains, open chains, and variable chains. In the past years, there have been some important articles regarding the configuration synthesis of the mechanisms with closed chains or open chains. However, the method for synthesizing mechanisms with variable chains has not been available. The designers usually design basing on the experiences and inspiration. Therefore, the purpose of this work is to provide a systematic design methodology for mechanisms with variables chains. This work starts by classifying mechanisms and investigating the mechanisms with variables chains. Then, the variable joints using on the mechanisms with variable joints are studied and defined. Including revolute joints, prismatic joints, cam joints, fixed joints, and separated joints, are illustrated. Four representations, mechanism topology matrix, graphs, joint codes, and finite state machine, are provided for presenting and analyzing the mechanisms with variable chains. By reviewing and modifying the methodology for the configuration synthesis of mechanisms with closed or open chains, a methodology for configuration synthesis of mechanisms with variable chains is provided and the can-opener is taken as an example to illustrating the procedure. Finally, the double-dwell slider-crank mechanism, the stopper mechanical lock, and the antenna deployment mechanism are taken as examples to verify the feasibility of the methodology, 7 new double-dwell slider-crank mechanisms, 5 new stopper mechanical lock, and 7 new deployment mechanisms are obtained. The method provided by this work is not only used in mechanisms with variable chains, but also can be used in mechanisms with closed chains or open chains. The result of this work is necessary for concept evaluation, detail design, and patent application.
Kang, Chen-Hsiung, and 康振雄. "Configuration Synthesis of Mechanisms with Variable Topologies." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/05962348600494125289.
Full text國立成功大學
機械工程學系碩博士班
96
Mechanisms with multiple topological structures during the operation process are called mechanisms with variable topologies (MVTs), and their corresponding kinematic chains are called variable chains. The kinematic joints whose types and/or motion orientations are changeable during the operation process of an MVT are called variable joints. The MVTs are usually designed for satisfying multiple design requirements. This work presents a systematic design methodology for MVTs and determines the variability configurations of mechanisms subject to the design requirements at each stag. First, locutions of mechanisms with multiple configurations including kinematotropic, metamorphic, discontinuously movable mechanisms, and MVTs are introduced. Then, the topological characteristics of variable joints subject to input motions are investigated. The operation as well as its principles are defined, and the concept of mapping functions of variable joints is provided. A mapping function method is provided to describe the topological characteristics of mechanisms and to determine the relationships of mechanism configurations between different stages. Moreover, fundamental synthesizing corollaries are established. Then, the concept of the simplified unified graph that represents topological changes in an MVT is used to address the configuration of MVTs. A sawing mechanism and a mechanical lock with variable passwords are exemplified to analyze their topological characteristics and configuration transformations of MVTs. Finally, according to the fundamental concepts, simplified unified graph, coordinate sequence, and mobility criterion at each stage, a design methodology is proposed for the configuration synthesis of MVTs. A mechanical lock with invariable passwords, a sawing mechanism, and a mechanical lock with variable passwords are exemplified to verify the feasibility of the design methodology. And, one new mechanical lock with invariable passwords, twenty-three new sawing mechanisms, and five new mechanical locks with variable passwords are obtained.
Yang, Yi-Chen, and 楊義成. "Mechanism Configuration Synthesis and Machining Analysis." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/99089271632265774362.
Full text國立成功大學
機械工程學系
88
The purpose of this paper is to investigate the characteristics of wire-cut electric discharge machines in all respects, including: mechanism configuration synthesis, machining error analysis and algorithm for CAD/CAM system. Firstly, the mechanism configuration synthesis for wire-cut EDM machine is proposed. The mechanism tree-graph representations are introduced to conclude the topology and motion characteristics of wire-cut EDM. The design requirements are studied and the structure configurations are synthesized. The design process starts by investigating existing mechanisms and concludes their topology and motion characteristics. The second step is to describe the topology structures of existing mechanisms. The third step is to transform these mechanisms into their corresponding generalized tree graphs. The fourth step is to obtain all possible tree graph. The fifth step is to assign certain type of links and joints. Finally, the atlas mechanisms are obtained. As the result, for the wire-cut EDM machine, the number of possible configurations is 248. Secondly, using the Denavit-Hartenburg matrix to describe the motion of the wire and to generate the function of the ruled surface. Then, applied the error of each link and joint to analysis the error matrix of each link. Finally, using the differential method to calculate the machining error. Two examples are shown to compare the current mechanism and new mechanism synthesized from chapter 3. Finally, this paper proposes a CAD/CAM mathematical foundation to design ruled surfaces for wire-cut EDM. This method combines the boundary plane concept, the Plucker coordinate representation of lines, control lines and design function to generate free form ruled surfaces. The tool motion and offset surface can also be generated simply by the same approach for computer numerical control (CNC) wire-cut EDM. The algorithm, being different from conventional methods, can present a surface or tool path concisely and uniquely.
陳福成. "Mechanism configuration synthesis of machining centers." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/31016292246842966408.
Full textLin, Dong-Lei, and 林東磊. "Automated Network Mechanism Testing Configuration Tools." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/dta8g7.
Full text中原大學
資訊工程研究所
104
Performing adequate network experiments is important in developing new network mechanisms or network security systems. However, setting up a high-fidelity testing environment is a complicated task and requires a lot of considerations in details. In this thesis, we proposed a set of tools to assist users to automate the process of setting up network testing environments and regenerate the corresponding network activities according to the network traffic records provided by the users. The tool consists of two components: One is the configuration component which analyzes a given network traffic record to obtain relevant network topology information and map the topology to the targeted testing platform. The other is the background traffic generator which regenerates the network activity specified in the same network traffic record. The proposed tool set reduces the burden of the user in designing and carry out network experiments and allow the users to concentrate their effort on the development of new mechanisms.
Lin, Hun-shung, and 林宏舜. "Configuration Synthesis of Static Balancing Mechanism." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/83715325427864051582.
Full text國立臺灣大學
機械工程學研究所
88
The static balancing mechanism is a mechanism, which balances the weight of objects via springs. Such as supporting frames and surgical lights, SCM is broadly applied to support and pick-and-place objects. To ensure the safety of the objects in manufacture process, the static balancing mechanism can be balanced at arbitrary rest configuration and moves objects stably without aids of actuators. The design of SCM can be separated into two sections, the configuration synthesis and the spring-design. Since there is no systematic procedure about the configuration synthesis, the configuration is always four-bar parallelogram mechanism. A systematic design procedure for one-dof four- and six-link static balancing mechanisms is developed in this study. Structural characteristics for the two-link static balancing mechanism are investigated, from which general structural characteristics for up-to-six link static balancing mechanisms can be generated. According to these structural characteristics, an atlas of valid configurations for up-to-six link static balancing mechanisms is obtained. It will be shown that a static balancing mechanism can be synthesized by connecting multiple one-dof static balancing mechanisms to adapt to versatile design requirements. It is believed that the proposed approach provides better physical comprehension in the design process and is beneficial to extent the application of static balancing mechanisms.