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Дисертації з теми "Operations Research"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

Polo, Mejia Oliver Javier. "Operational research approach for optimising the operations of a nuclear research laboratory." Thesis, Toulouse, INSA, 2019. http://www.theses.fr/2019ISAT0033.

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Cette thèse présente les résultats d’un projet de recherche visant l’optimisation du processus d’ordonnancement d’activités au sein d’un laboratoire de recherche du Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA). Pour aborder ce problème, nous décomposons chaque activité en un ensemble de tâches élémentaires pour appliquer des méthodes classiques d’ordonnancement. Nous modélisons le problème d’ordonnancement du laboratoire comme une version étendue du problème de gestion de projet multi-compétences (Multi-Skill Project Scheduling Problem ou MSPSP). En première approche, n

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2

Ben-Zvi, Noa. "(OR)² : operations research applied to operating room supply chain." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/91096.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014. In conjunction with the Leaders for Global Operations Program at MIT.<br>Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, 2014. In conjunction with the Leaders for Global Operations Program at MIT.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 63).<br>Massachusetts General Hospital (MGH) is ranked as the top hospital in New England and second nation-wide. It is also the largest hospital in New England; it

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3

Stuart, Kari Louise. "Using operations research methodologies to improve operating theatre scheduling." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/48697/1/Kari_Stuart_Thesis.pdf.

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A hospital consists of a number of wards, units and departments that provide a variety of medical services and interact on a day-to-day basis. Nearly every department within a hospital schedules patients for the operating theatre (OT) and most wards receive patients from the OT following post-operative recovery. Because of the interrelationships between units, disruptions and cancellations within the OT can have a flow-on effect to the rest of the hospital. This often results in dissatisfied patients, nurses and doctors, escalating waiting lists, inefficient resource usage and undesirable wait

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4

Puikko, J. (Janne). "An exact management method for demand driven, industrial operations." Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514261879.

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Abstract The framing into demand driven operations is because of the operations research modelling approach. The modelling approach requires continuous regressors and an independent response factor. The demand as an operating factor is considered as independent response factor in relation to the continuous regressors. The method validation is made along several longitudinal case studies to cover local, global and international industrial operations. The examined operational scope is from continuous operations to one-off production. Concerning scheduling, these examined demand driven, industria

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5

Rolland, Erik. "Abstract heuristic search methods for graph partitioning." Connect to resource, 1991. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1262633923.

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6

Sabwa, Jean-Marie. "Modeling of Spaza shop operations using soft and hard operational research techniques." Master's thesis, University of Cape Town, 2009. http://hdl.handle.net/11427/7698.

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Includes bibliographical references (leaves 90-93).<br>Globalization has transformed the world into a big village in which the rich are becoming richer and the poor getting poorer. In the commercial world the trend is for big business to buy out the smaller companies and consequently get bigger. Yet it is arguable that small businesses have assisted in providing much needed services to small communities that occupy informal settlements and exist on or below the poverty datum line. The South African government has amongst its main objectives the alleviation of poverty and the improvement of lif

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7

Sianturi, Maikel. "Operations research applied to forestry management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ53253.pdf.

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8

Kaczynski, William H. "Computational applications in stochastic operations research." W&M ScholarWorks, 2009. https://scholarworks.wm.edu/etd/1539623340.

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Several computational applications in stochastic operations research are presented, where, for each application, a computational engine is used to achieve results that are otherwise overly tedious by hand calculations, or in some cases mathematically intractable. Algorithms and code are developed and implemented with specific emphasis placed on achieving exact results and substantiated via Monte Carlo simulation. The code for each application is provided in the software language utilized and algorithms are available for coding in another environment. The topics include univariate and bivariate

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9

Girotra, Karan. "Essays in operations management." online access from Digital Dissertation Consortium, 2007. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3260909.

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10

Leung, Ngai-Hang Zachary. "Three essays in operations management." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92698.

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Анотація:

Thesis: Ph. D., Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The thesis applies optimization theory to three problems in operations management. In the first part of the thesis, we investigate the impact of inventory control on the availability of drugs to patients at public health facilities in Zambia. We present consistent empirical data and simulation results showing that, because of its failure to properly anticipate seasonal variations in demand and su

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11

Tan, Jian-An Tan Jian-an. "Research on offside priority round-about operations /." [S.l.] : [s.n.], 1993. http://library.epfl.ch/theses/?display=detail&nr=1097.

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12

Semini, Marco. "Applicability of Operations Research in Manufacturing Logistics." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produksjons- og kvalitetsteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15155.

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Анотація:

Ever-increasing customer expectations and fierce competition in global markets force manufacturing companies to continuously enhance competitiveness to stay profitable. In recent years, they have realized that manufacturing logistics, i.e. the management of material and information flows in manufacturing companies, has a considerable potential to reduce costs, improve customer service and provide them with a competitive advantage. Manufacturing logistics decision-making is, however, a complex and difficult task, and logistics professionals therefore continuously seek approaches and tools that

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13

McGovern, James Joseph. "Flight operations for higher harmonic control research." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28223.

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14

Martonosi, Susan Elizabeth. "An Operations Research approach to aviation security." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33671.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2005.<br>Includes bibliographical references (p. 151-163).<br>Since the terrorist attacks of September 11, 2001, aviation security policy has remained a focus of national attention. We develop mathematical models to address some prominent problems in aviation security. We explore first whether securing aviation deserves priority over other potential targets. We compare the historical risk of aviation terrorism to that posed by other forms of terrorism and conclude that the focus on a

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15

Bryant, Corban Harrell. "Robust planning for Effects-Based Operations." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37570.

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Thesis (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2006.<br>Includes bibliographical references (p. 171-176).<br>In this thesis. we introduce and analyze methods of creating theater-level robust mission plans for Effects Based Operations (EBO) of teams of Unmanned Aerial Vehicles (UAVs), and propose methods of effectively presenting the robust plan to an end user. Recent conflicts have demonstrated the utility of UAVs in performing Intelligence, Surveillance, and Reconnaissance (ISR) and strike missions. As UAVs become more common, hig

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16

Wang, Li Ph D. Massachusetts Institute of Technology. "Online and offline learning in operations." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/129080.

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Анотація:

Thesis: Ph. D., Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, September, 2020<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 213-219).<br>With the rapid advancement of information technology and accelerated development of data science, the importance of integrating data into decision-making has never been stronger. In this thesis, we propose data-driven algorithms to incorporate learning from data in three operations problems, concerning both online learning and offline learning settings. First, we study a

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17

Strednansky, Susan E. "Balancing the Trinity the Fine Art of Conflict Termination /." Maxwell AFB, Ala. : Air University Research Coordinator Office, 1998. http://www.au.af.mil/au/database/research/ay1995/saas/strednse.htm.

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18

Li, Kevin Bozhe. "Multiperiod Optimization Models in Operations Management." Thesis, University of California, Berkeley, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13423656.

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<p> In the past two decades, retailers have witnessed rapid changes in markets due to an increase in competition, the rise of e-commerce, and ever-changing consumer behavior. As a result, retailers have become increasingly aware of the need to better coordinate inventory control with pricing in order to maximize their profitability. This dissertation was motivated by two of such problems facing retailers at the interface between pricing and inventory control. One considers inventory control decisions for settings in which planned prices fluctuate over time, and the other considers pricing of m

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19

Yang, Kejian. "Topics in production." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1173295319.

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20

Weaver, Paul R. "Development and evaluation of an automated decision aid for rapid re-tasking of air strike assets in response to time sensitive targets." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FWeaver.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2004.<br>Thesis advisor(s): Richard E. Rosenthal, Thomas Hoivik. Includes bibliographical references (p. 77). Also available online.

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21

Trichakis, Nikolaos K. "Fairness in operations : from theory to practice." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67769.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 131-136).<br>This thesis deals with two basic issues in resource allocation problems. The first issue pertains to how one approaches the problem of designing the "right" objective for a given resource allocation problem. The notion of what is "right" can be fairly nebulous; we consider two issues that we see as key: efficiency and fairness. We approach the problem of designing objectives that ac

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22

Howard, Stephen P. "Special Operations Forces and Unmanned Aerial Vehicles Sooner or Later? /." Maxwell AFB, Ala. : Air University Research Coordinator Office, 1998. http://www.au.af.mil/au/database/research/ay1995/saas/howardsp.htm.

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Thesis (M.M.A.S.)--School of Advanced Airpower Studies, 1995.<br>Subject: An analysis of whether Special Operations Forces should use Unmanned Aerial Vehicles to support intelligence, surveillance, reconnaissance, communications and re-supply capability deficiencies. Cover page date: June 1995. Vita. Includes bibliographical references.

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23

Huang, Dashan. "Studies on quantitative finance via operations research methods." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/135989.

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24

French, Alan Paul. "Specification transformation techniques with applications to operations research." Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293238.

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25

Chen, Yue M. Eng Massachusetts Institute of Technology. "Application of deterministic operations research for structural optimization." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99590.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 66-67).<br>This thesis discusses the application of operations research theories for structural optimization problems, while the discussion is restricted to deterministic system. The methodology employed follows the general methodology of operations research: mathematical models are utilized to represent real-world problems and making decisions based on the solutions generated through mathematical

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26

Myers, Jametta. "Applications of Operations Research in Domestic Electric Utilities." VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/1658.

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Since its inception in the 1950s, operations research has been used in a number of industries, including the energy industry. Documentation of its use in exploration, production, gasoline blending, oil spill management, coal mining, coal handling, and coal mixing is extensive. However, considerably less documented research exists for one significant customer of many of these products: the electric utility. This work reviews refereed literature from United States operations research journals that document the use of operations research in United States electric utility operations. Applications

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27

Baird, Renardo. "An autonomous forklift research platform for warehouse operations." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121621.

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Анотація:

This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 45-46).<br>Autonomous vehicle technology has seen transformative change over the past decade, enabling products such as autonomous automobiles. In the field of warehouse automation, autonomous vehicles have a long history, wit

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28

Matinrad, Niki. "An Operations Research Approach for Daily Emergency Management." Licentiate thesis, Linköpings universitet, Kommunikations- och transportsystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157099.

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Анотація:

Emergency services play a vital role in society by providing help to affected people and minimizing damage to public and private assets as well as the environment during emergencies. However, these organizations deal with problems of increasing demand uncertainty and resource shortage over time. These problems lead to the creation of many other problems, such as longer response times, lower survivability of victims and patients, and more severe damage to properties and the environment. Acquiring more information about future emergency demand, such as factors affecting this demand, can contribu

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29

Bain, Matthew D. "Supporting a Marine Corps Distributed Operations Platoon a quantitative analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FBain.pdf.

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30

Chang, Kok Meng. "The performance of edge organizations in a collaborative task." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FChang.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2005.<br>Thesis Advisor(s): Susan M. Sanchez, Paul J. Sanchez. Includes bibliographical references (p. 75). Also available online.

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31

Seichter, Stephan. "The Fast Theater Model (FATHM) : optimization of air-to-ground engagements as a defender-attacker model /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FSeichter.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2005.<br>Thesis Advisor(s): Robert F. Dell, Gerald G. Brown. Includes bibliographical references (p. 57). Also available online.

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32

Maeng, Honjae. "An application of technological maturity assessment to ROKAF T-50 aircraft production program." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Dec%5FMaeng.pdf.

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33

Kassanke, Stephan. "Ontologiebasierte Strukturierung von Lernobjekten in der Domäne Operations Research, Management Science und Einbettung in ein hypermediales Lernsystem." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973573449.

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34

Wiedemann, Michael. "Robust parameter design for agent-based simulation models with application in a cultural geography model." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FWiedemann.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2010.<br>Thesis Advisor(s): Johnson, Rachel T. ; Second Reader: Baez, Francisco R, "June 2010." Description based on title screen as viewed on July 15, 2010. Author(s) subject terms: Cultural Geography, Agent-Based Model (ABM), Irregular Warfare (IW), Theory of planned Behavior (TpB), Baysian Belief Nets (BBN), Counterinsurgency Operations (COIN), Stability Operations, Discrete Event Simulation (DES), Design of Experiments (DOX), Robust Parameter Design (RPD). Includes bibliographical references (p. 69-70). Also available in

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35

Bodden, Huntley J. "A survivability assessment of the transformable craft in an operational environment." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FBodden.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2010.<br>Thesis Advisor(s): Horne, Gary E. ; Second Reader: Lucas, Thomas W. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Transformable Craft, T-Craft, Sea base, Sea base Connector. Includes bibliographical references (p. 87-89). Also available in print.

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36

Tsoutis, Anastasios. "An analysis of the Joint Strike Fighter autonomic logistics system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FTsoutis.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, September 2006.<br>Thesis Advisor(s): Arnold H. Buss. "September 2006." Includes bibliographical references (p. 87-88). Also available in print.

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37

Dozier, Pamela C. "Using dynamic sustainment to determine the impact of varying levels of reliability on future combat systems maintenance requirements." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FDozier.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2006.<br>Thesis Advisor(s): Samuel E. Buttrey. "December 2006." Includes bibliographical references (p. 59-61). Also available in print.

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38

Lim, Hang Sheng. "A methodological approach for conducting a business case analysis for the Joint Distance Support and Response (JDSR) Advanced Concept Technology Demonstration (ACTD)." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FLim%5FHang.pdf.

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Анотація:

Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2006.<br>Thesis Advisor(s): Dan Nussbaum, David Meyer. "December 2006." Includes bibliographical references (p. 71-72). Also available in print.

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39

Weedmark, Michael Ellsworth. "Minimizing machine set-up time when manufacturing printed circuit boards." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9487.

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Анотація:

Technical advances in the past decade have enabled the development of very fast but expensive component placement machines for the production of Printed Circuit Boards (PCBs). However, when these fast machines have to assemble small volumes of many different types of circuit boards, the machine set-up time becomes much more important than the assembly rate of each board. In order to minimize this set up time, we must try to solve the set-up/sequencing decision problem according to either the MCS (Minimizing Component Switches) or MSI (Minimizing Switching Instants) performance criterion, or bo

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40

Weedmark, Mark Archie. "Optimizing printed circuit board assembly times on a high-speed pick-and-place machine." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9994.

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In this thesis, we investigate the problem of minimizing printed circuit board assembly time on high-speed pick-and-place machines. As it is considered unlikely that efficient methods will be found for this problem, heuristic methods which give near optimal solutions are sought. Several such methods currently exist, but there are no comparisons made between the different methods. One of the reasons for this is the differences in the models used. In the thesis, we develop a more general model for the problem which encompasses most other models, and is robust, i.e. it can easily be adapted to di

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41

Coskun, Risvan. "SIMEX: A simulation-based expert production scheduling system." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/10286.

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Анотація:

A good methodology for production scheduling can result in high efficiency in reducing manufacturing costs. SIMEX is an experimental simulation-based expert production scheduler developed by the author for applications in flexible flow shop systems in a dynamic factory environment. This study introduces the general framework of SIMEX. A prototype is developed on an IBM compatible PC in Prolog, MODSIM II, Visual Basic, and Visual C++ to generate feasible and acceptable schedules with a synchronous data exchange facility. In general, primary tasks of SIMEX are to meet due dates of the final prod

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42

Alnowibet, Khalid Abdulaziz. "Nonstationary Erlang Loss Queues and Networks." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-04222004-192735/.

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The nonstationary Erlang loss model is a queueing system consisting of a finite number of servers and no waiting room with a nonstationary arrival process or a time-dependent service rate. The Erlang loss model is commonly used to model and evaluate many communication systems. Often, these types of service systems encounter a change in the arrival rate over time while the service rate remains either constant or changes very little over time. In view of this, the focus in this research is the nonstationary Erlang loss queues and network with time-dependent arrival rate and constant service rate

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43

Kramer, Jeremy Daniel. "Min-Cost Multicommodity Network Flows: A Linear Case for the Convergence and Reoptimization of Multiple Single-Commodity Network Flows." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-04242009-204158/.

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Network Flow problems are prevalent in Operations Research, Computer Science, Industrial Engineering and Management Science. They constitute a class of problems that are frequently faced by real world applications, including transportation, telecommunications, production planning, etc. While many problems can be modeled as Network Flows, these problems can quickly become unwieldy in size and difficult to solve. One particularly large instance is the Min-Cost Multicommodity Network Flow problem. Due to the time-sensitive nature of the industry, faster algorithms are always desired: recent advan

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Asgharzadeh, Talebi Zohreh. "Exact and Heuristic Methods for solving the View-Selection Problem for Aggregate Queries." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-05092006-123513/.

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In this thesis we present a formal study of the following view-selection problem: Given a set of queries, a database, and an upper bound on the amount of disk space that can be used to store materialized views, return definitions of views that, when materialized in the database, would reduce the evaluation costs of the queries. Optimizing the layout of stored data using view selection has a direct impact on the performance of the entire database system. At the same time, the optimization problem is intractable, even under natural restrictions on the types of queries of interest. We introduce a

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Mathews, Reena. "Simple Strategies to Improve Data Warehouse Performance." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-05172004-213304/.

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Data warehouse management is fast becoming one of the most popular and important topics in industries today. For business executives, it promises significant competitive advantage for their companies, while presenting the information system managers a way to overcome the obstructions in providing business information to managers and other users. Here the company is going through the problem of inefficient performance of its data warehouse. To find an appropriate solution to this problem we first try to understand the data warehouse concept and its basic architecture, followed by an in depth st

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Lightner, Carin Ann. "A Tabu Search Approach to Multiple Sequence Alignment." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-05312008-191232/.

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Sequence alignment methods are used to detect and quantify similarities between different DNA and protein sequences that may have evolved from a common ancestor. Effective sequence alignment methodologies also provide insight into the structure function of a sequence and are the first step in constructing evolutionary trees. In this dissertation, we use a tabu search approach to multiple sequence alignment. A tabu search is a heuristic approach that uses adaptive memory features to align multiple sequences. The adaptive memory feature, a tabu list, helps the search process avoid local optimal

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Lin, Yu-Min. "Tabu Search and Genetic Algorithm for Phylogeny Inference." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-10092008-235130/.

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Phylogenetics is the study of evolutionary relations between different organisms. Phylogenetic trees are the representations of these relations. Researchers have been working on finding fast and systematic approaches to reconstruct phylogenetic trees from observed data for over 40 years. It has been shown that, given a certain criterion to evaluate each tree, finding the best fitted phylogenetic trees among all possible trees is an NP-hard problem. In this study, we focus on the topology searching techniques for the maximum-parsimony and maximum-likelihood phylogeny inference. We proposed two

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Hong, Tao. "Long-Term Spatial Load Forecasting Using Human-Machine Co-construct Intelligence Framework." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-10212008-105450/.

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This thesis presents a formal study of the long-term spatial load forecasting problem: given small area based electric load history of the service territory, current and future land use information, return forecast load of the next 20 years. A hierarchical S-curve trending method is developed to conduct the basic forecast. Due to uncertainties of the electric load data, the results from the computerized program may conflict with the nature of the load growth. Sometimes, the computerized program is not aware of the local development because the land use data lacks such information. A human-mach

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Lea, Djuana. "Soft Computing Approaches to Routing and Wavelength Assignment in Wavelength-Routed Optical Networks." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-10312004-195203/.

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The routing and wavelength assignment (RWA) problem is essential for achieving efficient performance in wavelength-routed optical networks. For a network without wavelength conversion capabilities, the RWA problem consists of selecting an appropriate path and wavelength for each connection request while ensuring that paths that share common links are not assigned the same wavelength. The purpose of this research is to develop efficient adaptive methods for routing and wavelength assignment in wavelength-routed optical networks with dynamic traffic. The proposed methods utilize soft computing t

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McClusky, Douglas. "Ad-hoc Wireless Routing for Wildlife Tracking with Environmental Power Constraint." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-11012006-114034/.

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The purpose of this paper is to suggest an algorithm by which mica motes can organize themselves into a network to relay packets as quickly as possible under energy constraints from environmental harvesting. This problem is part of a larger project to develop a means to monitor red wolves using a mica mote network. The network has three parts: sensor motes attached to collars on the wolves, a base station or base stations that receive packets and display them in useable form for scientists and relay motes that forward packets from the sensor motes to a base station. The proposed algorithm adap

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