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1
Turke, Ulrich. "Efficient methods for WCDMA radio network planning and optimization." Wiesbaden : Dt. Univ.-Verl, 2007. https://www.lib.umn.edu/slog.phtml?url=http://www.myilibrary.com?id=134460.
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Türke, Ulrich. "Efficient methods for WCDMA radio network planning and optimization /." Wiesbaden : Dt. Univ.-Verl, 2007. http://www.myilibrary.com?id=134460.
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3
Foote, Colin Edward Thomas. "New methods for new challenges in electricity distribution network planning." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436851.
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4
Jacobson, Jay Alan. "State space partitioning methods for solving a class of stochastic network problems." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/24928.
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5
Nash, Edward John. "Development and implementation of models and methods in temporal GIS for spatial network planning decision support." Thesis, University of Newcastle Upon Tyne, 2004. http://hdl.handle.net/10443/764.
Повний текст джерелаАнотація:
Geographical Information Systems (GIS) are today widely used for management of spatial data, particularly that relating to network infrastructure for telecommunications, utilities and transport. GIS also form a valuable tool for planning the future development of such networks and many organisations use GIS packages for this, despite the fact that it is not necessarily a task for which they have been designed. They may therefore lack many features that are of benefit, or even essential, for efficient storage and analysis of data relating to future designs. This thesis considers what the characteristics of such data may be and what shortcomings exist in current GIS regarding this, and then describes the development, implementation and testing of suitable models and methods to address these shortcomings. Of particular importance is found to be the need for a network-planning GIS application to incorporate an appropriate model of time for handling situations where there may be many alternative scenarios, a subject which has hitherto been largely unaddressed by GIS research despite having obvious applications. Existing temporal models are therefore examined to find the most suitable, which is then developed from a broad conceptual model to a model specifically designed for application to spatial network planning; Temporal Topology. The possibility for automated design optimisation using this model is then introduced, and some appropriate methods for performing this task are given. Issues which may affect the implementation of an application using the Temporal Topology model and these optimisation methods are then considered before the description of an implementation which was used to carry out a network planning case study with the aim of testing the concepts developed in this thesis. The implications of this research on the wider field of GIS, and particularly Temporal GIS are then considered.
6
Kroener, Martina Ursula. "Multi-level Analytic Network Process Model to Mitigate Supply Chain Disruptions in Disaster Recovery Planning." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1540.
Повний текст джерелаАнотація:
Over the past few decades, environmental changes have led to more frequent occurrences and greater intensities of natural disasters worldwide. In terms of globally connected supply chains, this has resulted in an enormous economical loss for corporations. Therefore, Business Continuity and Disaster Recovery (BC/DR) planning and management has become essential for businesses in order to protect their critical business flow. Yet there is a lack of systematic and transparent methodologies for companies to handle this problem.
Hence, this thesis introduces a novel approach to combine consecutive steps of the Disaster Recovery Planning (DRP) process within one application. The multi-criteria decision-making (MCDM) tool called the Analytic Network Process (ANP) is employed to identify critical products of a business and match them with optimal disruption mitigation strategies based on an evaluation of benefits, opportunities, costs, and risks (BOCR).
To validate the method developed in this thesis, a case study using historical data of a U.S. company (Company XYZ) is introduced. The results of the ANP mathematical modeling demonstrate that the developed methodology provides a valuable approach to analyze and confirm BC/DR planning decisions. Moreover, an expert of Company XYZ confirmed that the suggested solution established through this case study is in agreement with the preferable choice based on his expertise and professional decision-making.
Further research could extend the proposed methodology to other fields of BC/DR planning, such as IT Disaster Recovery Planning or Human Disaster Relief.
7
Qiu, Waishan. "Increasing Saudi females' accessibility to employment via car-pooling in Riyadh : measure the realistic commute cost by network computing methods and investigate the share-ability based on actual taxi trip data." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111478.
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Thesis: M.C.P., Massachusetts Institute of Technology, Department of Urban Studies and Planning, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 121-124).
Due to the driving ban as well as to social restrictions on their movement with male drivers, Saudi women have to rely on either male family members or the employer's shuttle bus; otherwise they would hire a driver or take the taxi. These few options pose high commute cost on Saudi females, hence their access to economic opportunities is restrained, especially among lower car ownership segments. Such restrictions have negative influence on Saudi females' employment. The employment rate of Saudi women is only 22%. However, no previous research has quantitatively investigated the commute cost as a financial burden and barrier to job participation for Saudi females. Taking the capital city Riyadh as a case study, this study will (1) develop the method to measure the realistic commute cost (in terms of time and money) by different transportation options for Saudi female residents in different job sectors; (2) examine the spatial mismatch between Saudi females' concentration and their job markets using the notion of accessibility; (3) demonstrate ridesharing's capacity of providing greater access for Saudi women based on spatial analysis of the current commute demands and behaviors; (4) and also look at the feasibility of developing ridesharing programs based on network analysis of current taxi trips. This study sheds light on implications for policy makers and ridesharing service companies to reduce Saudi females' commute cost so as to increase their access to economic opportunities.
by Waishan Qiu.
M.C.P.
8
Ceita, Yannick Soares de Barros de. "Shared solution for telecommunications networks." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23613.
Повний текст джерелаАнотація:
Mestrado em Engenharia Eletrónica e de TelecomunicaçõesDespite the substantial increase in the percentage of the globe surface covered by mobile communications, there are issues that have hampered the implementation and development of cellular networks in regions where the market and economic power are still under development. Many of these issues are of economic and financial nature. It is curiously a contradictory fact, since mobile communications on several occasions proved to be a great ally for the growth and economic development of this type of regions. Therefore, in situations such as these, where the development or installation of cellular networks is blocked or conditioned by economic and financial factors, the adoption of infrastructure or service sharing methods can facilitate the implementation and expansion of cellular networks in these regions. The work developed in this dissertation seeks to identify and study the most common methods of cellular network sharing. Through the use of a numerical tool, the effects and techno-economic benefits that each sharing method will bring to the operators interested in entering markets with these characteristics will be analyzed.
Apesar do crescente aumento da superfície terrestre coberta pelas comunicações móveis, há questões que têm dificultado à implementação e desenvolvimento das redes celulares nas regiões onde o mercado e o poder económico ainda estão em desenvolvimento. Muitas dessas questões são de carácter económico e financeiro. O que se torna, curiosamente, um facto contraditório, uma vez que as comunicações móveis em diversas ocasiões provaram ser um grande aliado para o crescimento e desenvolvimento económico deste tipo de regiões. Portanto para situações como estas, onde o desenvolvimento ou instalação de redes celulares é travado ou condicionado por factores de carácter económico e financeiro, a adopção de métodos de partilha de infraestruturas ou serviços consegue facilitar a implementação e expansão de redes celulares nestas regiões. O trabalho desenvolvido nesta dissertação procura identificar e estudar os métodos mais comum de partilha. Através do uso de uma ferramenta de cálculo, analisam-se também os efeitos e benefícios económicos que cada método de partilha trará para os operadores interessados em entrar em mercados com características aqui consideradas.
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Скворчевський, Олександр Євгенович, та Ірина Євгенівна Гармаш. "Математичне моделювання в організації та управлінні інноваційною діяльністю". Thesis, НТУ "ХПІ", 2010. http://repository.kpi.kharkov.ua/handle/KhPI-Press/28263.
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Woeste, Christian C. "Passive-optical-network planning based on Tabu Search : an investigation of zero-base Brownfield planning for passive optical telecommunication networks based on the modern heuristic optimisation method Tabu Search." Thesis, University of Sunderland, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267750.
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11
Naude, Kevin Alexander. "A method for the evaluation of similarity measures on graphs and network-structured data." Thesis, Nelson Mandela Metropolitan University, 2014.
Знайти повний текст джерелаАнотація:
Measures of similarity play a subtle but important role in a large number of disciplines. For example, a researcher in bioinformatics may devise a new computed measure of similarity between biological structures, and use its scores to infer bio-logical association. Other academics may use related approaches in structured text search, or for object recognition in computer vision. These are diverse and practical applications of similarity. A critical question is this: to what extent can a given similarity measure be trusted? This is a difficult problem, at the heart of which lies the broader issue: what exactly constitutes good similarity judgement? This research presents the view that similarity measures have properties of judgement that are intrinsic to their formulation, and that such properties are measurable. The problem of comparing similarity measures is one of identifying ground-truths for similarity. The approach taken in this work is to examine the relative ordering of graph pairs, when compared with respect to a common reference graph. Ground- truth outcomes are obtained from a novel theory: the theory of irreducible change in graphs. This theory supports stronger claims than those made for edit distances. Whereas edit distances are sensitive to a configuration of costs, irreducible change under the new theory is independent of such parameters. Ground-truth data is obtained by isolating test cases for which a common outcome is assured for all possible least measures of change that can be formulated within a chosen change descriptor space. By isolating these specific cases, and excluding others, the research introduces a framework for evaluating similarity measures on mathematically defensible grounds. The evaluation method is demonstrated in a series of case studies which evaluate the similarity performance of known graph similarity measures. The findings of these experiments provide the first general characterisation of common similarity measures over a wide range of graph properties. The similarity computed from the maximum common induced subgraph (Dice-MCIS) is shown to provide good general similarity judgement. However, it is shown that Blondel's similarity measure can exceed the judgement sensitivity of Dice-MCIS, provided the graphs have both sufficient attribute label diversity, and edge density. The final contribution is the introduction of a new similarity measure for graphs, which is shown to have statistically greater judgement sensitivity than all other measures examined. All of these findings are made possible through the theory of irreducible change in graphs. The research provides the first mathematical basis for reasoning about the quality of similarity judgments. This enables researchers to analyse similarity measures directly, making similarity measures first class objects of scientific inquiry.
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Wallnerström, Carl Johan. "On Risk Management of Electrical Distribution Systems and the Impact of Regulations." Licentiate thesis, KTH, Electromagnetic Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4717.
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The Swedish electricity market was de-regulated in 1996, followed by new laws and a new regulation applied to the natural monopolies of electrical distribution systems (EDS). These circumstances have motivated distribution systems operators (DSOs) to introduce more comprehensive analysis methods. The laws, the regulation and additional incentives have been investigated within this work and results from this study can be valuable when developing risk methods or other quantitative methods applied to EDS. This tendency is not unique for Sweden, the results from a comparative study of customer outage compensation laws between Sweden and UK is for example included.
As a part of investigating these incentives, studies of the Swedish regulation of customer network tariffs have been performed which provide valuable learning when developing regulation models in different countries. The Swedish regulatory model, referred to as the Network Performance Assessment Model (NPAM), was created for one of the first de-regulated electricity markets in the world and has a unique and novel approach. For the first time, an overall presentation of the NPAM has been performed including description of the underlying theory as a part of this work. However, the model has been met by difficulties and the future usage of the model is uncertain. Furthermore, the robustness of the NPAM has been evaluated in two studies with the main conclusion that the NPAM is sensitive toward small variations in input data. Results from these studies are explained theoretically investigating algorithms of the NPAM.
A pre-study of a project on developing international test systems is presented and this ongoing project aims to be a useful input when developing risk methods. An application study is included with the approach to systematically describe the overall risk management process at a DSO including an evaluation and ideas of future developments. The main objective is to support DSOs in the development of risk management, and to give academic reference material to utilize industry experience. An idea of a risk management classification has been concluded from this application study. The study provides an input to the final objective of a quantitative risk method.
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Bahlke, Florian [Verfasser], Marius [Akademischer Betreuer] Pesavento, and Eduard [Akademischer Betreuer] Jorswieck. "Optimization Methods for Heterogeneous Wireless Communication Networks: Planning, Configuration and Operation / Florian Bahlke ; Marius Pesavento, Eduard Jorswieck." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1185639608/34.
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Ogier, Maxime. "Contributions à la chaine logistique numérique : conception de circuits courts et planification décentralisée." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00981923.
Повний текст джерелаАнотація:
Le concept de chaîne logistique numérique regroupe l'ensemble des modèles, méthodes et outils qui permettent de planifier les décisions sur des prototypes numériques de chaîne logistique. Dans ce travail de thèse, nous proposons deux contributions à la chaîne logistique numérique. Nos résultats se destinent en particulier aux réseaux de Petites et Moyennes Entreprises/Industries. D'une part, nous étudions deux nouveaux problèmes liés à la conception de réseaux logistiques en circuits courts et de proximité pour les produits agricoles frais. Pour chacun d'eux nous proposons une formulation en Programme Linéaire à Variables Mixtes. De plus des méthodes de résolution fondées sur des décompositions du modèle nous permettent de résoudre des instances de grande taille. Pour chaque problème, cette approche est mise en œuvre sur une étude de cas menée avec plusieurs collectivités territoriales. D'autre part, nous étudions le problème de planification tactique des activités de production, de transport et de stockage. Contrairement aux approches classiques centralisées, nous considérons que les décisions des différents acteurs sont prises de manière décentralisée. Nous étudions la manière de décomposer les décisions entre les acteurs ainsi que leurs comportements individuels. Nous analysons aussi des protocoles de concertation basés sur un échange limité d'informations. Afin de répondre à la double complexité du problème, nous proposons un outil innovant qui couple une simulation à base de multi-agents à des approches d'optimisation par programmation mathématique.
15
Urbanovsky, Joshua C. "Computational Methods to Optimize High-Consequence Variants of the Vehicle Routing Problem for Relief Networks in Humanitarian Logistics." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1248473/.
Повний текст джерелаАнотація:
Optimization of relief networks in humanitarian logistics often exemplifies the need for solutions that are feasible given a hard constraint on time. For instance, the distribution of medical countermeasures immediately following a biological disaster event must be completed within a short time-frame. When these supplies are not distributed within the maximum time allowed, the severity of the disaster is quickly exacerbated. Therefore emergency response plans that fail to facilitate the transportation of these supplies in the time allowed are simply not acceptable. As a result, all optimization solutions that fail to satisfy this criterion would be deemed infeasible. This creates a conflict with the priority optimization objective in most variants of the generic vehicle routing problem (VRP). Instead of efficiently maximizing usage of vehicle resources available to construct a feasible solution, these variants ordinarily prioritize the construction of a minimum cost set of vehicle routes. Research presented in this dissertation focuses on the design and analysis of efficient computational methods for optimizing high-consequence variants of the VRP for relief networks. The conflict between prioritizing the minimization of the number of vehicles required or the minimization of total travel time is demonstrated. The optimization of the time and capacity constraints in the context of minimizing the required vehicles are independently examined. An efficient meta-heuristic algorithm based on a continuous spatial partitioning scheme is presented for constructing a minimized set of vehicle routes in practical instances of the VRP that include critically high-cost penalties. Multiple optimization priority strategies that extend this algorithm are examined and compared in a large-scale bio-emergency case study. The algorithms designed from this research are implemented and integrated into an existing computational framework that is currently used by public health officials. These computational tools enhance an emergency response planner's ability to derive a set of vehicle routes specifically optimized for the delivery of resources to dispensing facilities in the event of a bio-emergency.
16
Neumann, Fabian. "Prozessmanagement in der Computertomographie unter Anwendung der Netzplantechnik." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974140201.
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Satt, Junior Sérgio. "Construção de cenário para uma refinaria de petróleo com baixa escala e não integrada: um estudo de caso." Universidade do Vale do Rio dos Sinos, 2012. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4108.
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O ambiente empresarial atual apresenta determinados eventos de alta incerteza e de difícil previsibilidade, é necessário que as empresas e seus gestores estejam preparados para atuar em novos e diferentes ambientes de negócios. A mudança no ambiente do refino de petróleo no Brasil iniciou com a abertura do mercado de combustíveis em 1997, Lei 9.478/97. Essa lei propiciou a participação de outros agentes, além da Petrobras, no exercício das atividades de importação e exportação de derivados de petróleo. O segmento de refino no Brasil tem apresentado ciclos de baixa e alta, pois os preços dos derivados nas refinarias não têm sido reajustados na mesma velocidade dos movimentos de preços dos derivados no mercado internacional. Com isso, as refinarias não integradas, é o caso estudado neste trabalho - a Refinaria de Petróleo Riograndense, têm apresentado menor rentabilidade se comparadas com refinarias integradas. Portanto, é necessário identificar eventuais vantagens competitivas que permitam sustentar o negócio deste tipo de refinaria a partir de uma perspectiva de longo prazo. Para tal, foi aplicado o método de construção de cenário Global Business Network (GBN), a fim de criar cenários futuros que apontem alternativas de atuação para uma refinaria de petróleo de baixa escala e não integrada. Além disso, verificar quais as contribuições que o método de construção de cenários GBN trouxe para a empresa e seus gestores. A pesquisa foi caracterizada como qualitativa, exploratória, utilizando o método pesquisa-ação para descrever melhor a construção dos cenários na empresa pesquisada. O resultado da pesquisa foi a geração de dois cenários futuros para a Refinaria Riograndense, onde se apresentam caminhos distintos de atuação no segmento de refino, considerando o ambiente futuro dos negócios e as características da empresa, ou seja, refinaria de petróleo de baixa escala e não integrada. As conclusões do trabalho indicam que o método de construção de cenário GBN contribui para melhorar a percepção da empresa e dos seus gestores sobre o ambiente do futuro do negócio, reduzindo erros no processo de tomada de decisão. Com isso, foi possível apontar caminhos futuros de sobrevivência para a empresa em um ambiente de forte competitividade e restrições ambientais. Também, o método GBN mostrou-se ser flexível às características da empresa, permitindo valorizar os conhecimentos e experiências dos gestores, bem como incentivar o envolvimento dos gestores no processo de construção de cenários.
In the current business environment, there are certain events with high uncertainty that make predictability difficult; thus, companies and their managers must be prepared to act in new and different business environments. Changes in the environment of oil refining in Brazil began with the opening of the fuel market in 1997, since Law 9,478/97 enabled other agents, in addition to Petrobras, to participate in activities related to the import and export of oil products. The refining segment in Brazil has experienced cycles with low and high prices because they have not been adjusted at the same speed as the ones of oil products in the international market. From this perspective, non-integrated refineries were analyzed in this study, mainly the Riograndense Oil Refinery, which has shown lower profitability than integrated ones. Therefore, potential competitive advantages that enable the business to support this type of refinery in the long term were identified. The method of building Global Business Network (GBN) scenarios was applied in order to create future scenarios which can suggest alternatives to a small-scale and non-integrated oil refinery. Besides, the contributions that the method of building GBN scenarios brought to the company and its managers were verified. This qualitative and exploratory research used action research to better describe scenario building in the company. Results generated two scenarios (Maverick and Revolution) for the future of the Riograndense Refinery; they showed distinct paths to be followed in the refining segment, taking into consideration the future of the business environment and the characteristics of the company, i. e., a small-scale and non-integrated oil refinery. The study concludes that the method of constructing GBN scenario helps to improve the perception of the company and its managers about the future of the business environment, reducing errors in the process of decision making. In addition, future directions for the company to survive in an environment with strong competition and environmental constraints could be identified. Furthermore, the GBN method proved to be flexible concerning the characteristics of the company since it valued managers’ knowledge and experience and encouraged them to get involved in the process of scenario building.
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Desai, Avni, and Maria Widgren. "A Collaboration in Product Service System for Telecom Networks : An "Orange and Ericsson case" study." Thesis, Linköpings universitet, Industriell miljöteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-120311.
Повний текст джерелаАнотація:
The purpose of the research is to study the “Orange and Ericsson case” while developing the method Actors and System Map. The interaction between actors within Ericsson’s Device Connection Platform is investigated in order to identify improvement opportunities in the interaction between the provider and the customer. To answer the purpose the following research questions was formulated: RQ1) What type of actors may be involved in a telecom related IPSO? RQ2) How can the connections between actors in the telecom related IPSO be illustrated? RQ3) How can the Actors and System Map method be refined? In order to answer the research questions different methodologies were used for the analysing process. The research started with a widespread literature study to collect knowledge related to the area of Product Service System (PSS) and methodologies for identifying how actors interact with one another. Studying different mapping methods the conclusion was made that Actors and System Map was most suitable for this study. In the methodology background the previous selected method, Actors and System Map from an Integrated Product Service Offering (IPSO) perspective, was examined in order to be able to refine and improve the mapping method. Actors Map provides a visual and clear overview of the actors involved while a System Map shows the information flows and activities between the actors. To understand the interaction between the two companies, the definition of IPSO and the importance of value-based selling for a service offering are described in the theory background. Also, different ways of looking at a business model within the telecommunication industry is presented. Obtaining information regarding making an Actors Map and a System Map an improved mapping method was refined. The adaption of the method was divided into eight steps. The refined Actors Maps of the DCP shows the actors involved, how they are connected and their main assignments from each respondent’s point of view at Ericsson. The refined System Map shows what kind of information is transferred between the actors within the companies and between Orange and Ericsson. Both maps delivered as a decision basis will help identification of non-value giving links and non-optimal distances in the information flow for both companies.
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Júnior, Alberto de Medeiros. "Sistemas integrados de gestão: proposta para um procedimento de decisão multicritérios para avaliação estratégica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3136/tde-02062008-142434/.
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Os Sistemas Integrados de Gestão, também conhecidos como ERP (Enterprise Re-source Planning), vem tendo ampla utilização nas organizações a partir dos anos 90. Por exigir um investimento de elevado valor financeiro para a sua implantação, os responsáveis pela sua aquisição devem tomar cuidados especiais, uma vez que os seus resultados positivos ou negativos somente surgem após longo período de im-plantação, às vezes após muitos anos. Sendo um problema complexo, repleto de incertezas e riscos, os decisores tomam muito de seu tempo para analisar os diver-sos critérios e funcionalidades das ofertas de sistemas recebidas. A tese objetiva apresentar um procedimento que possibilite às empresas, em particular as de pe-queno e médio porte, um procedimento que as permita analisar quando do interesse da aquisição de um ERP, qual das ofertas disponíveis estará mais adequada às su-as necessidades de negócio, baseado em um método multicritérios de apoio à deci-são. A revisão da literatura analisa os Sistemas de Informação (SI) informatizados e os principais papéis desempenhados por eles: apoio às operações, apoio à vanta-gem competitiva e apoio à decisão. A seleção das ofertas propostas foi efetuada uti-lizando o método de Estudo de Casos múltiplos em empresas que adquiriram esses sistemas,ghy utilizando o ANP (Analytic Network Process) como instrumento de pesquisa. Para se estabelecer uma classificação dos critérios utilizados na análise foi utilizada a Técnica Delphi, a qual foi realizada junto a especialistas em Tecnologia de Informação. O resultado obtido pelo Estudo de Casos mostrou que o procedimen-to proposto é válido e pode ser utilizado por empresas de todos os portes.The use of Integrated Management Systems, also known as ERP (Enterprise Re-source Planning), are widely accepted by organizations since beginning of the ni-neties. As its implementation means a high financial value investment, the respon-sible team for its acquisition has to take special cares, once their positive or nega-tive results will appear only after long implementation period, often after many years. As it is a complex decision problem, evolving uncertainties and risks, the decision agents spend a lot of time to analyze the several criteria and functional-ities from received offers. This thesis presents a proposal which makes possible the companies, particularly those of small or medium sizes, which allows to analyze during the ERP acquisition phase, the available offers more adapted to their business requirements, based on a multi-criteria support decision method. The literature revision analyzes the computerized Information Systems (IS) and the main roles carried out by them: operations support, competitive advantage support and decision support. In order to define the criteria set used in the multi-criteria analysis, the Delphi Method was used and it was answered by Information Technology experts. These criteria was used to classify the ERP\'s offers using the multiple cases study using ANP (Analytic Network Process) as research tool.. The results obtained by case study in four companies were used to validate several propositions.
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Molter, Uli. "Der ÖPNV überwindet Grenzen!" Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-78932.
Повний текст джерелаАнотація:
Problemstellung
Kooperationsstrukturen grenzüberschreitender Nahverkehrsangebote sind bislang nur zu Einzelvorhaben untersucht und beschrieben worden. Es fehlte bislang eine vergleichende, typologisierende und systematisierende Untersuchung. Die besondere Herausforderung grenzüberschreitender Nahverkehrsplanung und -organisation liegt in der starken Verankerung des ÖPNV in nationalen Strukturen und Hierarchien. Besonders der fortwährende Annäherungsprozess an der deutsch-tschechischen Grenze stellt die Akteure vor große Herausforderungen.
Forschungsfrage: Wer sind in unterschiedlichen Regionen die Akteure grenzüberschreitender Planungs- und Organisationsprozesse im öffentlichen Nahverkehr, wie und aus welchen Gründen gestalten sie die notwendigen Interaktionsprozesse vor dem Hintergrund ihrer Motive und Ressourcen?
Vorgehensweise
Ausgehend von eine theoretischen Fundierung in den Bereichen ÖPNV-Planung, Netzwerken und grenzüberschreitenden Kooperationen sind anhand eines Leitfadens insgesamt 43 Experteninterviews in deutscher und tschechischer Sprache in Salzburg, dem Berchtesgadener Land, Nordböhmen (Liberecký kraj, Ústecký kraj und Karlovarský kraj) sowie Südsachsen durchgeführt worden. Im Sinne einer qualitativen Netzwerkanalyse konnten insgesamt 23 Projekte und Vorhaben (davon 14 im sächsisch-tschechischen Raum) analysiert werden.
Ergebnisse
Ausgehend vom aktuellen ÖPNV-Angebot auf den grenzüberschreitenden Linien konnten unterschiedliche Angebotsstrukturen in themenbezogener Weise typologisiert werden. Zu unterscheiden sind partielle und verbundähnliche Kooperationen. Eine Erweiterung dieser Typisierung durch eine zielbezogene Strukturierung und Einbeziehung der Akteurs- und Interaktionsmodi liefert drei grundlegende Kooperationsstrukturen: Die problemlösungsorientierte, innersphärische Kooperation, die projektbezogene Kooperation (zielbezogene Umsetzung) und die entwicklungsorientierte, integrierte Kooperation.
Querschnittsorientierte Ergebnisse
Im Zuge der Interviewauswertung konnte eine Vielzahl an querschnittsorientierten Erkenntnissen gewonnen werden, die für die zukünftige Gestaltung grenzüberschreitender ÖPNV-Vorhaben handlungsleitend sein können. Die Erkenntnisse richten sich u.a. auf die Relevanz von Vertrauen, die Problematik fehlender Kongruenzen, zeitliche Aspekte sowie Unsicherheiten bzgl. Traditionen, Eigenarten und Hierarchien.
Wissenschaftlich-methodische Ergebnisse
Die Werkzeuge und Methoden der qualitativen Netzwerkanalyse konnten gewinnbringend im grenzüberschreitenden Kontext angewendet werden, wodurch ebenfalls ein Beitrag zur Überwindung des methodologischen Nationalismus geleistet wurde. Die qualitative Analyse von Einzelbeispielen liefert wichtige Hinweise für eine eher quantitativ-standardisierte Erhebungen einer größeren Anzahl von grenzüberschreitenden ÖPNV-Vorhaben.
Nationale Organisationsmodelle des ÖPNV wurden diskutiert und um eine grenzüberschreitenden Komponente erweitert. Dadurch steht nun eine Darstellungsmethode für vergleichende Analysen zur Verfügung und grenzüberschreitende Organisationsstrukturen des ÖPNV zwischen nationalen Kontexten können systematisch verstanden und erklärt werden.
Inhaltlich-anwendungsbezogene Ergebnisse
Erstmals steht eine vergleichende Darstellung unterschiedlichster grenzüberschreitender Linien und Vorhaben in Bezug auf ihre Genese und Geschichte, ihrer regionalen Einbettung und ihrer ÖPNV-bezogenen Funktion zur Verfügung.
Die den oft rudimentären grenzüberschreitenden ÖPNV-Angeboten und ihrer Einbindung in nationale Systeme zugrunde liegenden Problemstrukturen können besser verstanden werden. Die Blackbox der Gestaltung ÖPNV-bezogener Kooperationsstrukturen wird aufgebrochen.
Die genaue Analyse der Netzwerkbeziehungen mit der qualitativen Ergänzung führt zu einem besseren Verständnis grenzüberschreitender ÖPNV-Strukturen durch verantwortliche Akteure in Politik und Verwaltung und erleichtert damit die politische und verwaltungsbezogene Unterstützung grenzüberschreitender Vorhaben vor Ort.
Ergänzend wird der Handlungsbedarf auf regionaler, nationaler und europäischer Ebene hinsichtlich notwendiger rechtlich-organisatorischer Rahmenbedingungen für eine Vereinfachung grenzüberschreitender ÖPNV-Vorhaben skizziert.
Fazit
Die Arbeit liefert eine vergleichende ÖPNV-bezogene Darstellung zweier sehr unterschiedlicher Regionen im Mitteleuropa. Akteure im ÖPNV finden darin systematische Darstellungen der rechtlich-organisatorischen Rahmenbedingungen in den untersuchten Räumen und können den Umgang der Akteure vor Ort mit diesem institutionellen Kontext verstehen. Flexible, unkonventionelle und strategisch bedeutsame Lösungsansätze können nachgeschlagen und aufgrund der Modellbildung hinsichtlich ihrer Anwendbarkeit und Übertragbarkeit überprüft werden. Gerade für den sich weiter im Transformationsprozess befindlichen sächsisch-tschechischen Grenzraum liefert die Arbeit im Sinne des europäischen Kohäsionsprozesses umfangreiche Grundlagen, zukünftige Kooperationen im ÖPNV erfolgreich für alle Seiten zu gestalten.
21
Molter, Uli. "Der ÖPNV überwindet Grenzen!: Akteure, Netzwerke, Planung und Organisation grenzüberschreitender Nahverkehrsprojekte.Deutschland – Österreich und Deutschland – Tschechien." Doctoral thesis, Universitätsverlag Chemnitz, 2011. https://monarch.qucosa.de/id/qucosa%3A19611.
Повний текст джерелаАнотація:
Problemstellung
Kooperationsstrukturen grenzüberschreitender Nahverkehrsangebote sind bislang nur zu Einzelvorhaben untersucht und beschrieben worden. Es fehlte bislang eine vergleichende, typologisierende und systematisierende Untersuchung. Die besondere Herausforderung grenzüberschreitender Nahverkehrsplanung und -organisation liegt in der starken Verankerung des ÖPNV in nationalen Strukturen und Hierarchien. Besonders der fortwährende Annäherungsprozess an der deutsch-tschechischen Grenze stellt die Akteure vor große Herausforderungen.
Forschungsfrage: Wer sind in unterschiedlichen Regionen die Akteure grenzüberschreitender Planungs- und Organisationsprozesse im öffentlichen Nahverkehr, wie und aus welchen Gründen gestalten sie die notwendigen Interaktionsprozesse vor dem Hintergrund ihrer Motive und Ressourcen?
Vorgehensweise
Ausgehend von eine theoretischen Fundierung in den Bereichen ÖPNV-Planung, Netzwerken und grenzüberschreitenden Kooperationen sind anhand eines Leitfadens insgesamt 43 Experteninterviews in deutscher und tschechischer Sprache in Salzburg, dem Berchtesgadener Land, Nordböhmen (Liberecký kraj, Ústecký kraj und Karlovarský kraj) sowie Südsachsen durchgeführt worden. Im Sinne einer qualitativen Netzwerkanalyse konnten insgesamt 23 Projekte und Vorhaben (davon 14 im sächsisch-tschechischen Raum) analysiert werden.
Ergebnisse
Ausgehend vom aktuellen ÖPNV-Angebot auf den grenzüberschreitenden Linien konnten unterschiedliche Angebotsstrukturen in themenbezogener Weise typologisiert werden. Zu unterscheiden sind partielle und verbundähnliche Kooperationen. Eine Erweiterung dieser Typisierung durch eine zielbezogene Strukturierung und Einbeziehung der Akteurs- und Interaktionsmodi liefert drei grundlegende Kooperationsstrukturen: Die problemlösungsorientierte, innersphärische Kooperation, die projektbezogene Kooperation (zielbezogene Umsetzung) und die entwicklungsorientierte, integrierte Kooperation.
Querschnittsorientierte Ergebnisse
Im Zuge der Interviewauswertung konnte eine Vielzahl an querschnittsorientierten Erkenntnissen gewonnen werden, die für die zukünftige Gestaltung grenzüberschreitender ÖPNV-Vorhaben handlungsleitend sein können. Die Erkenntnisse richten sich u.a. auf die Relevanz von Vertrauen, die Problematik fehlender Kongruenzen, zeitliche Aspekte sowie Unsicherheiten bzgl. Traditionen, Eigenarten und Hierarchien.
Wissenschaftlich-methodische Ergebnisse
Die Werkzeuge und Methoden der qualitativen Netzwerkanalyse konnten gewinnbringend im grenzüberschreitenden Kontext angewendet werden, wodurch ebenfalls ein Beitrag zur Überwindung des methodologischen Nationalismus geleistet wurde. Die qualitative Analyse von Einzelbeispielen liefert wichtige Hinweise für eine eher quantitativ-standardisierte Erhebungen einer größeren Anzahl von grenzüberschreitenden ÖPNV-Vorhaben.
Nationale Organisationsmodelle des ÖPNV wurden diskutiert und um eine grenzüberschreitenden Komponente erweitert. Dadurch steht nun eine Darstellungsmethode für vergleichende Analysen zur Verfügung und grenzüberschreitende Organisationsstrukturen des ÖPNV zwischen nationalen Kontexten können systematisch verstanden und erklärt werden.
Inhaltlich-anwendungsbezogene Ergebnisse
Erstmals steht eine vergleichende Darstellung unterschiedlichster grenzüberschreitender Linien und Vorhaben in Bezug auf ihre Genese und Geschichte, ihrer regionalen Einbettung und ihrer ÖPNV-bezogenen Funktion zur Verfügung.
Die den oft rudimentären grenzüberschreitenden ÖPNV-Angeboten und ihrer Einbindung in nationale Systeme zugrunde liegenden Problemstrukturen können besser verstanden werden. Die Blackbox der Gestaltung ÖPNV-bezogener Kooperationsstrukturen wird aufgebrochen.
Die genaue Analyse der Netzwerkbeziehungen mit der qualitativen Ergänzung führt zu einem besseren Verständnis grenzüberschreitender ÖPNV-Strukturen durch verantwortliche Akteure in Politik und Verwaltung und erleichtert damit die politische und verwaltungsbezogene Unterstützung grenzüberschreitender Vorhaben vor Ort.
Ergänzend wird der Handlungsbedarf auf regionaler, nationaler und europäischer Ebene hinsichtlich notwendiger rechtlich-organisatorischer Rahmenbedingungen für eine Vereinfachung grenzüberschreitender ÖPNV-Vorhaben skizziert.
Fazit
Die Arbeit liefert eine vergleichende ÖPNV-bezogene Darstellung zweier sehr unterschiedlicher Regionen im Mitteleuropa. Akteure im ÖPNV finden darin systematische Darstellungen der rechtlich-organisatorischen Rahmenbedingungen in den untersuchten Räumen und können den Umgang der Akteure vor Ort mit diesem institutionellen Kontext verstehen. Flexible, unkonventionelle und strategisch bedeutsame Lösungsansätze können nachgeschlagen und aufgrund der Modellbildung hinsichtlich ihrer Anwendbarkeit und Übertragbarkeit überprüft werden. Gerade für den sich weiter im Transformationsprozess befindlichen sächsisch-tschechischen Grenzraum liefert die Arbeit im Sinne des europäischen Kohäsionsprozesses umfangreiche Grundlagen, zukünftige Kooperationen im ÖPNV erfolgreich für alle Seiten zu gestalten.
22
Pan, Feng. "Stochastic network interdiction models and methods /." Thesis, 2005. http://repositories.lib.utexas.edu/bitstream/handle/2152/1692/panf72229.pdf.
Повний текст джерела
23
Kiese, Moritz [Verfasser]. "Efficient optimization methods for communication network planning and assessment / Moritz B. Kiese." 2010. http://d-nb.info/1002223644/34.
Повний текст джерела
24
Liao, Hung-Jen, and 廖宏仁. "Using New Efficient Methods to Solve Cell Planning of Base Station in Mobile Communication Network." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/65632347487702373702.
Повний текст джерелаАнотація:
碩士國立屏東科技大學
資訊管理系
92
The cell planning problem is very widely-studied and increasingly important in nowadays and future mobile communication. A location management scheme will affect the cost of cell planning in mobile networks. The partition of location areas is developed to minimize the total signalling costs of handling both user location and search operation in cellular networks. This NP—complete problem is commonly solved using heuristics such as genetic algorithms, neural networks, Tabu search and simulated annealing. In this thesis, three new cell planning approaches for base station using Multiple Enhanced Genetic Algorithm (MEGA), Hybrid Improved Tabu Search (HITS) and an Intuitive Algorithm (IA) are proposed. The simulation results obtained by the application to several well-known problems reveal that these absolutely new methods clearly outperform some existing algorithms.
25
Saha, Sudipta. "A comparative analysis on computational methods for fitting an ERGM to biological network data." 2013. http://liblink.bsu.edu/uhtbin/catkey/1712474.
Повний текст джерелаАнотація:
Understanding of a global biological network structure by studying its simple
local properties through the well-developed field of graph theory is of interest. In
particular, in this research an observed biological network was explored through a
simulation study. However, one difficulty in such exploration lies on the fitting of
graphical models on biological network data. An Exponential Random Graph Model
(ERGM) was considered to determine estimations of the several network attributes of
complex biological network data. We also compared the estimates of observed network
to our random simulated network for both Markov Chain Monte Carlo Maximum
Likelihood Estimation (MCMCMLE) and Maximum Pseudo Likelihood Estimation
(MPLE) methods under ERGM. The motivation behind this was to determine how
different the observed network could be from a randomly simulated network if the
physical numbers of attributes were approximately same. Cut-off points of some common
attributes of interest for different order of nodes were determined through simulations.
We implemented our method to a known regulatory network database of E. coli.Department of Mathematical Sciences
26
Huang, Chao-Min, and 黃兆民. "Using Sequential Valuation Network Method in Strategy Planning." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10990362784771629075.
Повний текст джерела
27
Chiu, Yi-Fen, and 邱怡芬. "Application of Co-kriging method to the groundwatermonitoring network planning." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/72428810203799491745.
Повний текст джерелаАнотація:
碩士國立交通大學
土木工程學系
85
This study applies the co-kriging method to the groundwater monitoring netwo rk design and it also develops threenetwork planning models--Sequential optima l method ,non-linearprogramming methods and branh and bound method--by combing with co-kriging method.
28
Bahlke, Florian. "Optimization Methods for Heterogeneous Wireless Communication Networks: Planning, Configuration and Operation." Phd thesis, 2019. http://tuprints.ulb.tu-darmstadt.de/8675/1/2019-02-14_Bahlke_Florian.pdf.
Повний текст джерелаАнотація:
With the fourth generation of wireless radio communication networks reaching maturity, the upcoming fifth generation (5G) is a major subject of current research. 5G networks are designed to achieve a multitude of performance gains and the ability to provide services dedicated to various application scenarios. These applications include those that require increased network throughput, low latency, high reliability and support for a very high number of connected devices. Since the achieved throughput on a single point-to-point transmission is already close to the theoretical optimum, more efforts need to be invested to enable further performance gains in 5G. Technology candidates for future wireless networks include using very large antenna arrays with hundreds of antenna elements or expanding the bandwidth used for transmission to the millimeter-wave spectrum. Both these and other envisioned approaches require significant changes to the network architecture and a high economic commitment from the network operator.
An already well established technology for expanding the throughput of a wireless communication network is a densification of the cellular layout. This is achieved by supplementing the existing, usually high-power, macro cells with a larger number of low-power small cells, resulting in a so-called heterogeneous network (HetNet). This approach builds upon the existing network infrastructure and has been shown to support the aforementioned technologies requiring more sophisticated hardware. Network densification using small cells can therefore be considered a suitable bridging technology to path the way for 5G and subsequent generations of mobile communication networks.
The most significant challenge associated with HetNets is that the densification is only beneficial for the overall network performance up to a certain density, and can be harmful beyond that point. The network throughput is limited by the additional interferences caused by the close proximity of cells, and the economic operability of the network is limited by the vastly increased energy consumption and hardware cost associated with dense cell deployment. This dissertation addresses the challenge of enabling reliable performance gains through network densification while guaranteeing quality-of-service conditions and economic operability.
The proposed approach is to address the underlying problem vertically over multiple layers, which differ in the time horizon on which network optimization measures are initiated, necessary information is gathered, and an optimized solutions are found. These time horizons are classified as network planning phase, network configuration phase, and network operation phase. Optimization schemes are developed for optimizing the resource- and energy consumption that operate mostly in the network configuration phase. Since these approaches require a load-balanced network, schemes to achieve and maintain load balancing between cells are introduced for the network planning phase and operation phase, respectively.
For the network planning phase, an approach is proposed for optimizing the locations of additional small cells in an existing wireless network architecture, and to schedule their activity phases in advance according to data demand forecasts. Optimizing the locations of multiple cells jointly is shown to be superior to deploying them one-by-one based on greedy heuristic approaches. Furthermore, the cell activity scheduling obtains the highest load balancing performance if the time-schedule and the durations of activity periods is jointly optimized, which is an approach originating from process engineering. Simulation results show that the load levels of overloaded cells can be effectively decreased in the network planning phase by choosing optimized deployment locations and cell activity periods.
Operating the network with a high resource efficiency while ensuring quality-of-service constraints is addressed using resource optimization in the network configuration phase. An optimization problem to minimize the resource consumption of the network by operating multiple separated resource slices is designed. The originally problem, which is computationally intractable for large networks, is reformulated with a linear inner approximation, that is shown to achieve close to optimal performance. The interference is approximated with a dynamic model that achieves a closer approximation of the actual cell load than the static worst-case model established in comparable state-ot-the art approaches.
In order to mitigate the increase in energy consumption associated with the increase in cell density, an energy minimization problem is proposed that jointly optimizes the transmit power and activity status of all cells in the network. An original problem formulation is designed and an inner approximation with better computational tractability is proposed. Energy consumption levels of a HetNet are simulated for multiple energy minimization approaches. The proposed method achieves lower energy consumption levels than approaches based on an exhaustive search over all cell activity configurations or heuristic power scaling. Additionally, in simulations, the likelihood of finding an energy minimized solution that satisfies quality-of-service constraints is shown to be significantly higher for the proposed approach.
Finally, the problem of maintaining load balancing while the network is in operation is addressed with a decentralized scheme based on a learning system using multi-class support vector machines. Established methods often require significant information exchange between network entities and a centralized optimization of the network to achieve load balancing. In this dissertation, a decentralized learning system is proposed that globally balance the load levels close to the optimal solution while only requiring limited local information exchange.
29
Fulton, Reid. "Supply and Demand Based Transit Service Allocation: A Method of Evaluating Transit Network." Thesis, 2008. http://hdl.handle.net/10012/3753.
Повний текст джерелаАнотація:
Travel patterns in Canadian urban areas changed during the twentieth century. No longer is urban travel downtown oriented. In all but the smallest Canadian urban areas, travel has evolved into a polycentric pattern. Despite this Canadian public transit networks remain oriented to the
older travel patterns because of shortages in planning capacity. The transit literature on performance monitoring focuses on “system” variables rather than “network” variables like how well transit networks match travel patterns. This research develops a method by which transit
planners can monitor the performance of transit networks in their communities. Applying this methodology provides recommendations to planners on how to improve transit network structures to better facilitate polycentric urban travel. Future research should compare the network performance of Canadian transit systems.
30
Kang, Da Jhou, and 康大洲. "Comparisons of Three Heuristic Method for Three-Dimensional RFID Reader Network Planning Problems." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/qbmar5.
Повний текст джерелаАнотація:
碩士長庚大學
電機工程學系
105
In recent years, radio frequency identification (RFID) technique has been widely used in various fields. Due to the limited interrogation zone, how to use the minimum reader to cover all the tags in the space to form the Reader Network Planning (RNP) problem. In this thesis, we proposed genetic algorithm (GA)、micro genetic algorithm (mGA) and particle swarm optimization (PSO) to solve the three-dimensional space reader network planning problem. Due to the traditional genetic algorithm and the traditional particle swarm optimization do not guarantee 100% tag coverage. To overcome the point, we proposed the correction scheme to guarantee 100% tag coverage. In addition, we proposed the spatial crossover to replace the traditional crossover of genetic algorithm and a micro genetic algorithm to improve the search ability. The comparison results show that the algorithms with correction scheme have 100% tag coverage.
31
Zubo, Rana H. A., Geev Mokryani, Haile S. Rajamani, J. Aghaei, T. Niknam, and Prashant Pillai. "Operation and planning of distribution networks with integration of renewable distributed generators considering uncertainties: a review." 2016. http://hdl.handle.net/10454/10660.
Повний текст джерелаАнотація:
YesDistributed generators (DGs) are a reliable solution to supply economic and reliable electricity to customers. It is the last stage in delivery of electric power which can be defined as an electric power source connected directly to the distribution network or on the customer site. It is necessary to allocate DGs optimally (size, placement and the type) to obtain commercial, technical, environmental and regulatory advantages of power systems. In this context, a comprehensive literature review of uncertainty modeling methods used for modeling uncertain parameters related to renewable DGs as well as methodologies used for the planning and operation of DGs integration into distribution network.
This work was supported in part by the SITARA project funded by the British Council and the Department for Business, Innovation and Skills, UK and in part by the University of Bradford, UK under the CCIP grant 66052/000000.
32
Zubo, R. H. A., Geev Mokryani, Haile S. Rajamani, J. Aghaei, T. Niknam, and Prashant Pillai. "Operation and planning of distribution networks with integration of renewable distributed generators considering uncertainties: a review." 2010. http://hdl.handle.net/10454/10660.
Повний текст джерелаАнотація:
YesDistributed generators (DGs) are a reliable solution to supply economic and reliable electricity to customers. It is the last stage in delivery of electric power which can be defined as an electric power source connected directly to the distribution network or on the customer site. It is necessary to allocate DGs optimally (size, placement and the type) to obtain commercial, technical, environmental and regulatory advantages of power systems. In this context, a comprehensive literature review of uncertainty modeling methods used for modeling uncertain parameters related to renewable DGs as well as methodologies used for the planning and operation of DGs integration into distribution network.
This work was supported in part by the SITARA project funded by the British Council and the Department for Business, Innovation and Skills, UK and in part by the University of Bradford, UK under the CCIP grant 66052/000000.
33
Menon, Syam Sankar. "Decomposition of integer programs with application to cutting stock and machine allocation /." 1997. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:9811896.
Повний текст джерела
34
Naoum-Sawaya, Joe. "New Benders' Decomposition Approaches for W-CDMA Telecommunication Network Design." Thesis, 2007. http://hdl.handle.net/10012/2769.
Повний текст джерелаАнотація:
Network planning is an essential phase in successfully operating state-of-the-art telecommunication systems. It helps carriers increase revenues by deploying the right technologies in a cost effective manner. More importantly, through the network planning phase, carriers determine the capital needed to build the network as well as the competitive pricing for the offered services. Through this phase, radio tower locations are selected from a pool of candidate locations so as to maximize the net revenue acquired from servicing a number of subscribers. In the Universal Mobile Telecommunication System (UMTS) which is based on the Wideband Code Division Multiple Access scheme (W-CDMA), the coverage area of each tower, called a cell, is not only affected by the signal's attenuation but is also affected by the assignment of the users to the towers. As the number of users in the system increases, interference levels increase and cell sizes decrease. This complicates the network planning problem since the capacity and coverage problems cannot be solved separately.
To identify the optimal base station locations, traffic intensity and potential locations are determined in advance, then locations of base stations are chosen so as to satisfy minimum geographical coverage and minimum quality of service levels imposed by licensing agencies. This is implemented through two types of power control mechanisms. The power based power control mechanism, which is often discussed in literature, controls the power of the transmitted signal so that the power at the receiver exceeds a given threshold. On the other hand, the signal-to-interference ratio (SIR) based power control mechanism controls the power of the transmitted signal so that the ratio of the power of the received signal over the power of the interfering signals exceeds a given threshold. Solving the SIR based UMTS/W-CDMA network planning problem helps network providers in designing efficient and cost effective network infrastructure. In contrast to the power based UMTS/W-CDMA network planning problem, the solution of the SIR based model results in higher profits. In SIR based models, the power of the transmitted signals is decreased which lowers the interference and therefore increases the capacity of the overall network. Even though the SIR based power control mechanism is more efficient than the power based power control mechanism, it has a more complex implementation which has gained less attention in the network planning literature.
In this thesis, a non-linear mixed integer problem that models the SIR based power control system is presented. The non-linear constraints are reformulated using linear expressions and the problem is exactly solved using a Benders decomposition approach. To overcome the computational difficulties faced by Benders decomposition, two novel extensions are presented. The first extension uses the analytic center cutting plane method for the Benders master problem, in an attempt to reduce the number of times the integer Benders master problem is solved. Additionally, we describe a heuristic that uses the analytic center properties to find feasible solutions for mixed integer problems. The second extension introduces a combinatorial Benders decomposition algorithm. This algorithm may be used for solving mixed integer problems with binary variables. In contrast to the classical Benders decomposition algorithm where the master problem is a mixed integer problem and the subproblem is a linear problem, this algorithm decomposes the problem into a mixed integer master problem and a mixed integer subproblem. The subproblem is then decomposed using classical Benders decomposition, leading to a nested Benders algorithm. Valid cuts are generated at the classical Benders subproblem and are added to the combinatorial Benders master problem to enhance the performance of the algorithm.
It was found that valid cuts generated using the analytic center
cutting plane method reduce the number of times the integer
Benders master problem is solved and therefore reduce the
computational time. It was also found that the combinatorial
Benders reduces the complexity of the integer
master problem by reducing the number of integer variables in it.
The valid cuts generated within the nested Benders algorithm
proved to be beneficial in reducing the number of times the
combinatorial Benders master problem is solved and in reducing the
computational time that the overall algorithm takes. Over 110
instances of the UMTS/W-CDMA network planning problem ranging from
20 demand points and 10 base stations to 140 demand points and 30
base stations are solved to optimality.
35
Cheng, Shin-Jen, and 鄭士仁. "Study on the Optimal Method of Estimation for Rainfall Depth and Its Application to the Planning and Design of Areal Rainfall Network." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/43292236612419518054.
Повний текст джерела
36
Munn, Peter. "Service coordination in rural South Australia." 2005. http://arrow.unisa.edu.au:8081/1959.8/46693.
Повний текст джерелаАнотація:
This study identifies informal networks as the most accepted method of sharing information. Enhancing service delivery is shown as being a key trigger of coordination while rigid funding approaches are perceived to be a major inhibitor. Organisational type, position, practice approaches and location are shown to influence people's perception of coordination.
37
(8300103), Shams R. Rahmani. "Digital Soil Mapping of the Purdue Agronomy Center for Research and Education." Thesis, 2020.
Знайти повний текст джерелаАнотація:
This research work concentrate on developing digital soil maps to support field based plant phenotyping research. We have developed soil organic matter content (OM), cation exchange capacity (CEC), natural soil drainage class, and tile drainage line maps using topographic indices and aerial imagery. Various prediction models (universal kriging, cubist, random forest, C5.0, artificial neural network, and multinomial logistic regression) were used to estimate the soil properties of interest.
38
Lozano, Argüelles Cristina. "Formación y uso de la tecnología de los profesores de escuelas de inmersión en español." Thesis, 2014. http://hdl.handle.net/1805/6037.
Повний текст джерелаАнотація:
Indiana University-Purdue University Indianapolis (IUPUI)El propósito de esta investigación es ahondar en los usos tecnológicos de los profesores de español y en la formación que han recibido para integrar las TIC en sus clases. En concreto, nos interesa saber su actitud y nivel de seguridad ante la tecnología, de qué recursos disponen y cuáles utilizan en sus clases, cómo aprenden a utilizarlos (formal e informalmente), qué problemas perciben y cómo les gustaría mejorar la integración de la tecnología en sus clases. El estudio se centra en un grupo de escuelas de inmersión de español en los estados de Indiana, Kentucky y Ohio.