Dissertations / Theses on the topic 'Dynamic Systems'
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Zhang, Liqian. "Optimal H2 model reduction for dynamic systems /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21841548.
Full textPiveropoulos, Giannis. "Dynamic object-oriented systems." Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298492.
Full text張立茜 and Liqian Zhang. "Optimal H2 model reduction for dynamic systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31241372.
Full textGupta, Amit. "Model reduction and simulation of complex dynamic systems /." Online version of thesis, 1990. http://hdl.handle.net/1850/11265.
Full textRafiliu, Sergiu. "Stability of Adaptive Distributed Real-TimeSystems with Dynamic Resource Management." Doctoral thesis, Linköpings universitet, Programvara och system, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98721.
Full textZhong, Zhian. "Power Systems Frequency Dynamic Monitoring System Design and Applications." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28707.
Full textPh. D.
Hughes, Jonathan L. "Applications of Stability Analysis to Nonlinear Discrete Dynamical Systems Modeling Interactions." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3819.
Full textMonga, Pavinder. "A System Dynamics Model of the Development of New Technologies for Ship Systems." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35258.
Full text
We provide a comprehensive knowledge elicitation process in which members from the Newport News Shipbuilding, the Naval Sea Command Cost Estimating Group, and the Virginia Tech System Performance Laboratory take part in a group model building exercise. We build a System Dynamics model based on the information and data obtained from the experts. Our investigation of the dynamics yields two dominant behaviors that characterize the technology development process. These two dynamic behaviors are damped oscillation and goal seeking. Furthermore, we propose and investigate four dynamic hypotheses in the system. For the current structure of the model, we see that an increase in the complexity of new technologies leads to an increase in the total costs, whereas a increase in the technology maturity leads to a decrease in the total costs in the technology development process. Another interesting insight is that an increase in training leads to a decrease in total costs.
Master of Science
Caronni, Germano. "Dynamic security in communication systems /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13156.
Full textSalloum, Mohammed. "Towards dynamic performance measurement systems." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10016.
Full textThe purpose of this report is to single out and apply the most critical factors for dynamic performance meausrement systems. The report concludes that the existence in practice of theoretically important aspects are diverse and that the most appropriate way of governing the aspects are through the creation of a performance management process.
The theoretical chapter is established for dual purposes. The first is to give the reader a comprehensive understanding of what has been done in the field of performance measurement and management so far and the second is to answer the first research question imposed.
The empirical chapter investigates to what degree the existence of factors singled out in theory are present in practice. Further, the chapter also answers research question two.
Finally the result and analysis chapters focuses on cross-analysing the case studies made and generate a recommendation. Research question three is answered under these headings.
PREPARE
Reichenbach, Tobias. "Dynamic patterns of biological systems." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-84101.
Full textDabdoub, Margaret-Rose Madeleine. "Intelligent dynamic space management systems." FIU Digital Commons, 1996. http://digitalcommons.fiu.edu/etd/2648.
Full textBaumann, Andrew Computer Science & Engineering Faculty of Engineering UNSW. "Dynamic update for operating systems." Awarded by:University of New South Wales. Computer Science and Engineering, 2007. http://handle.unsw.edu.au/1959.4/28356.
Full textGagnon, Gregory. "Dynamic analysis of economic systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0019/NQ53728.pdf.
Full textQu, Zhihua. "Robust control of dynamic systems." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/13452.
Full textMcCaskey, Suzanne D. "Robust design of dynamic systems." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/24223.
Full textCrane, John Stephen. "Dynamic binding for distributed systems." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484185.
Full textWilhelmij, Gerrit Paul. "Symbolic simulation of dynamic systems." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305630.
Full textRoewe, James M. "Fault tolerant dynamic agent systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33347.
Full textIncludes bibliographical references (p. 67-68).
Partial system snapshots reduce the cost per node to only depend on the size of the connected group instead of the size of the full system. These groups can be determined during system operation by using the communication patterns between nodes. The number of nodes that must rollback after a failure is limited to the size of these snapshot groups, reducing the work lost. These changes to snapshot algorithms are necessary because the cost per node for a snapshot increases and the expected time between failures decreases as the size of the system grows.
by James M. Roewe.
M.Eng.
Singh, Prince Sc D. Massachusetts Institute of Technology. "Neuromorphic control of dynamic systems." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119292.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 127-145).
Arguably, the agility of a robotic system is dictated by the speed of its processing pipeline, i.e., the speed of data acquisition plus data processing from a robot's on-board vision sensors. Specifically, one ideally hopes that this pipeline offer fresh measurements at a high temporal resolution with low-latency in a computationally-cheap manner for efficient control. This desirable situation may be hard to come by for majority of the current vision-based robotic applications that rely on the traditional CCD-/CMOS-pipeline, as one would be in search for traditional cameras that offer a high sampling rate (thus, high temporal resolution) whose potentially redundant (thus, not fresh) and synchronous output must be processed with low-latency in a computationally-cheap manner. For instance, processing the synchronous series of conventional camera images, which embed possibly redundant levels of intensities may greatly hinder the fast reaction times required by robots while expending power. This issue warrants the need for faster sensors in order to truly address the underlying perception problem for high-performance systems that need to operate under power constraints. To this end, we capitalize upon the merits of a recently introduced biologically inspired and computationally-cheap alternative to traditional cameras-called Neuromorphic Vision Sensors whose pixels independently and asynchronously (thus, high temporal resolution) fire, in the order of micro-seconds (thus, low-latency and high temporal resolution), a stream of non-redundant (thus, fresh) brightness changes represented as binary numbers (±1), termed retinal events, based on a trigger condition that is defined on a logarithmic scale. These properties offer a faster processing pipeline and hint that the Neuromorphic sensor would be a promising candidate to facilitate high-speed robotic applications. However, existing computer-vision based algorithms designed for processing periodic measurements cannot be directly adapted to process retinal events, as these are fired aperiodically, and are ambiguous since they are binary. As an additional challenge, in practice, many retinal events are misfired due to the presence of underlying sensor circuitry noise (not associated to physical brightness changes in the environment) and we term these as spurious events. The merits and operational constraints of this vision sensor mandates the development of a corresponding control-theoretic setup. Thus, the contributions of this dissertation are twofold: 1) to design a control algorithm that processes de-noised retinal events to facilitate a prescribed control task, and 2) to propose a de-noising procedure that mitigates the effect of spuriosity in retinal events. The first part of this dissertation, investigates the problem of controlling (i.e., stabilization and regulation) a Continuous-Time Linear Time Invariant (CT-LTI) system using retinal events generated from an idealistic model of a Neuromorphic Vision Sensor, which is an instance of a broad family of signal change detection sensors frequently encountered in practice. The contribution is to present a novel control design procedure that stabilizes and regulates a hybrid system, consisting of the CT-LTI system and the discrete-event signal change observation model, to a desired set-point. Moreover, the set of thresholds (sufficient conditions) for the given system to fulfill the prescribed control task is provided. The proposed controller is then extended to handle the case of noise in both the system dynamics as well as the observation model; thus, accounts for spurious events in this setting. The second part of this dissertation proposes a de-noising algorithm-Spuriosity Filter (SF)-and is motivated by the practical need to reduce spurious events whilst working with general observation models. The construction of SF is based on the fundamental lack of spatial correlation between spurious events and the algorithm trades off pixel resolution to produce a cleaner event stream on larger spatial scales by seeking a form of 'consensus' between neighboring pixels. At the core of our analysis lies a formal equivalence relation, defined as a means to track brightness, between our filter and a lower-resolution neuromorphic sensor with reduced noise levels. As a consequence of the principled analysis, we highlight important properties that any filter, which processes asynchronous noisy retinal events must respect and have not been accounted for by existing works. The effectiveness of the proposed control-theoretic setup for the illustrative task of heading regulation is illustrated over a range of systems: from numerical experiments to a laboratory testbed.
by Prince Singh.
Sc. D.
Itani, Sleiman M. "Dynamic systems and subadditive functionals." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53282.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 125-131).
Consider a problem where a number of dynamic systems are required to travel between points in minimum time. The study of this problem is traditionally divided into two parts: A combinatorial part that assigns points to every dynamic system and assigns the order of the traversal of the points, and a path planning part that produces the appropriate control for the dynamic systems to allow them to travel between the points. The first part of the problem is usually studied without consideration for the dynamic constraints of the systems, and this is usually compensated for in the second part. Ignoring the dynamics of the system in the combinatorial part of the problem can significantly compromise performance. In this work, we introduce a framework that allows us to tackle both of these parts at the same time. To that order, we introduce a class of functionals we call the Quasi-Euclidean functionals, and use them to study such problems for dynamic systems. We determine the asymptotic behavior of the costs of these problems, when the points are randomly distributed and their number tends to infinity. We show the applicability of our framework by producing results for the Traveling Salesperson Problem (TSP) and Minimum Bipartite Matching Problem (MBMP) for dynamic systems.
by Sleiman M. Itani.
Ph.D.
Rodrigues, Rodrigo Seromenho Miragaia 1975. "Robust services in dynamic systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33927.
Full textIncludes bibliographical references (p. 191-202).
Our growing reliance on online services accessible on the Internet demands highly- available systems that work correctly without interruption. This thesis extends previous work on Byzantine-fault-tolerant replication to meet the new requirements of current Internet services: scalability and the ability to reconfigure the service automatically in the presence of a changing system membership. Our solution addresses two important problems that appear in dynamic replicated services: First, we present a membership service that provides servers and clients in the system with a sequence of consistent views of the system membership (i.e., the set of currently available servers). The membership service is designed to be scalable, and to handle membership changes mostly automatically. Furthermore, the membership service is itself reconfigurable, and tolerates arbitrary faults of a subset of the servers that are implementing it at any instant. The second part of our solution is a generic methodology for transforming replicated services that assume a fixed membership into services that support a dynamic system membership. The methodology uses the output from the membership service to decide when to reconfigure.
(cont.) We built two example services using this methodology: a dynamic Byzantine quorum system that supports read and write operations, and a dynamic Byzantine state machine replication system that supports any deterministic service. The final contribution of this thesis is an analytic study that points out an obstacle to the deployment of replicated services based on a dynamic membership. The basic problem is that maintaining redundancy levels for the service state as servers join and leave the system is costly in terms of network bandwidth. To evaluate how dynamic the system membership can be, we developed a model for the cost of state maintenance in dynamic replicated services, and we use measured values from real-world traces to determine possible values for the parameters of the model. We conclude that certain deployments (like a volunteer-based system) are incompatible with the goals of large- scale reliable services. We implemented the membership service and the two example services. Our performance results show that the membership service is scalable, and our replicated services perform well, even during reconfigurations.
by Rodrigo Seromenho Miragaia Rodrigues.
Ph.D.
Delamore, David George. "Conceptual models for dynamic systems." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608827.
Full textHsu, Chih-hua. "Dynamic scheduling of manufacturing systems /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.
Full textRushton, Matthew V. "Static and dynamic type systems." Diss., Connect to the thesis Connect to the thesis, 2004. http://hdl.handle.net/10066/1483.
Full textLuo, Jiangtao. "Functional mapping of dynamic systems." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041189.
Full textChapman, Craig K. "Coarsening dynamical systems : dynamic scaling, universality and mean-field theories." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3255/.
Full textAl, Shoaili Saoud Humaid Salim. "Internet-based monitoring and controlling of real-time dynamic systems." Thesis, Curtin University, 2005. http://hdl.handle.net/20.500.11937/1123.
Full textKostkova, Patricie. "MAGNET - a dynamic resource management architecture." Thesis, City, University of London, 1999. http://discovery.ucl.ac.uk/10062371/.
Full textMaree, Charl. "Diagnostic monitoring of dynamic systems using artificial immune systems." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1780.
Full textThe natural immune system is an exceptional pattern recognition system based on memory and learning that is capable of detecting both known and unknown pathogens. Artificial immune systems (AIS) employ some of the functionalities of the natural immune system in detecting change in dynamic process systems. The emerging field of artificial immune systems has enormous potential in the application of fault detection systems in process engineering. This thesis aims to firstly familiarise the reader with the various current methods in the field of fault detection and identification. Secondly, the notion of artificial immune systems is to be introduced and explained. Finally, this thesis aims to investigate the performance of AIS on data gathered from simulated case studies both with and without noise. Three different methods of generating detectors are used to monitor various different processes for anomalous events. These are: (1) Random Generation of detectors, (2) Convex Hulls, (3) The Hypercube Vertex Approach. It is found that random generation provides a reasonable rate of detection, while convex hulls fail to achieve the required objectives. The hypercube vertex method achieved the highest detection rate and lowest false alarm rate in all case studies. The hypercube vertex method originates from this project and is the recommended method for use with all real valued systems, with a small number of variables at least. It is found that, in some cases AIS are capable of perfect classification, where 100% of anomalous events are identified and no false alarms are generated. Noise has, expectedly so, some effect on the detection capability on all case studies. The computational cost of the various methods is compared, which concluded that the hypercube vertex method had a higher cost than other methods researched. This increased computational cost is however not exceeding reasonable confines therefore the hypercube vertex method nonetheless remains the chosen method. The thesis concludes with considering AIS’s performance in the comparative criteria for diagnostic methods. It is found that AIS compare well to current methods and that some of their limitations are indeed solved and their abilities surpassed in certain cases. Recommendations are made to future study in the field of AIS. Further the use of the Hypercube Vertex method is highly recommended in real valued scenarios such as Process Engineering.
Stockton, Nicklas O. "Hybrid Genetic Fuzzy Systems for Control of Dynamic Systems." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1523635312922039.
Full textDamle, Pushkar Hari. "A system dynamics model of the integration of new technologies for ship systems." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35216.
Full textMaster of Science
Song, Xiaodan. "Exploiting dynamic patterns for recommendation systems /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5833.
Full textKunz, Jakob. "Dynamic behavior of district heating systems /." [S.l.] : [s.n.], 1994. http://library.epfl.ch/theses/?nr=1234.
Full textVillalba, Pablo Villalba. "Dynamic Spectrum Management in DSL Systems." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9509.
Full textThe candidate shall study different methods for dynamic spectral management in DSL systems, with main emphasis on autonomeous methods like iterative waterfilling. The methods shall be implemented in Matlab.
Lindström, Birgitta. "Testability of Dynamic Real-Time Systems." Doctoral thesis, Linköpings universitet, ESLAB - Laboratoriet för inbyggda system, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-16486.
Full textSchiller, Benjamin. "Graph-based Analysis of Dynamic Systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-230611.
Full textBajic, Mirko M. "Design of dynamic cellular manufacturing systems." Title page, abstract and contents only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phb165.pdf.
Full textKansal, Sachin. "Trajectory optimization for flat dynamic systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ59823.pdf.
Full textMantri, Parag. "Deployment Dynamic of Space Tether Systems." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-06202007-100101/.
Full textCheng, Qi. "Distributed fault detection for dynamic systems." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.
Full textDing, Huali. "Dynamic wear models for gear systems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1194025602.
Full textSeetzen, Helge. "High dynamic range display andprojection systems." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/7378.
Full textWoodford, Patrick Dominic. "Optimal control of nonsmooth dynamic systems." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265992.
Full textBondorowicz, Stefan. "Adaptive control of complex dynamic systems." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302787.
Full textGalanis, Georgios. "Dynamic polynomial combinants and linear systems." Thesis, City University London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527471.
Full textGeitner, Gert-Helge, and Guven Komurgoz. "Power Flow Modelling of Dynamic Systems." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-171305.
Full textSturacci, Jean. "MODELLING OF MACHINING SYSTEMS DYNAMIC BEHAVIOUR." Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174021.
Full textMatthews, Brian Martin. "Dynamic order-sorted term-rewriting systems." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337505.
Full textJohnson, Sam. "Analysis of nonlinear dynamic physiological systems." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433132.
Full text