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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
241

Contributions to the design of pumping stations in water distribution networks considering technical, economic and environmental aspects.

Briceño León, Christian Xavier 03 May 2023 (has links)
Tesis por compendio / [ES] El consumo energético de una estación de bombeo (EB) representa el mayor consumo de energía de un sistema de de distribución de agua. Adicionalmente, otros problemas como el cambio climático, el estrés hídrico y emisión de gases de efecto invernadero conducen a la necesidad de optimizar este tipo de instalaciones, tanto en su diseño como en su operación. La presente tesis doctoral consta de tres etapas de desarrollo. La primera etapa desarrolla una metodología de optimización de la operación de EB. La segunda etapa desarrolla un método de diseño de estaciones de bombeo considerando aspectos técnicos y económicos basados en el método AHP (Analytic Hierarchy Process, del Ingles). Finalmente, la tercera etapa es una mejora de la segunda añadiendo aspectos ambientales y consideración de variabilidad de la demanda. Una de las principales contribuciones es el desarrollo de una metodología para la optimización del funcionamiento de una EB. Esta metodología se basa en el uso de la curva de consigna y una operación combinando bombas de velocidad fija (BVF) y bombas de velocidad variable (BVV). El objetivo de este método es determinar el número óptimo de BVF y BVV en para cualquier caudal minimizando el consumo energético total de la EB. Esta metodología corrige la eficiencia de BVV determinada por las leyes de semejanza e incluye una formulación matemática de la eficiencia del variador de frecuencia. El diseño convencional de EB se basa la minimización del coste del ciclo de vida (CCV); suma de costes de inversión, operación y mantenimiento. La segunda etapa de la tesis, desarrolla un método integral de diseño de EB considerando aspectos técnicos y económicos aplicando el método AHP. La metodología propuesta consta de tres fases. La primera fase está relacionada la definición de los datos requeridos de la EB y permite definir los modelos factibles para la red. La segunda fase está relacionada con la definición de las posibles soluciones y su evaluación con los criterios técnicos y económicos. La tercera fase está relacionada con el cálculo del frente de Pareto del conjunto de soluciones obtenidas y la aplicación del método AHP. La metodología desarrollada en la segunda etapa de la tesis presenta cuatro limitaciones. La primera es no considerar los criterios medioambientales en el diseño de la EB. La segunda es no considerar la optimización del funcionamiento de una EB definido en la primera etapa. LA tercera está relacionada con la escala utilizada en el método AHP. La cuarta es la consideración de un único patrón de consumo en la estación de bombeo. Por ello, en la tercera etapa de la tesis se desarrolla una nueva propuesta de metodología de diseño de EB que pretende solventar estos problemas. Este nuevo método considera criterios medioambientales como el MEI, las emisiones de efecto invernadero o la eficiencia del método de regulación en la EB. El método incluye también una propuesta de modificación de la escala tradicional de valoración clásica del AHP. Las metodologías propuestas se han validado de forma comparativa con dos redes de distribución de agua (redes CAT y TF). Sobre ambas redes se compararon tanto los diferentes métodos propuestos como su comparativa con un planteamiento clásico del problema de diseño de una EB. En resumen, el la tesis recoge una metodología estandarizada para el diseño de cualquier tipo de EB (para agua potable, para riego etc.) considerando la configuración de bombeo más adecuada, haciendo uso de una variabilidad de la demanda, y considerando diferentes tipos de criterios (técnicos, económicos y ambientales) a través de un análisis multi criterio de toma de decisiones. / [CA] El consum energètic d'una estació de bombament (EB) representa el consum d'energia més gran d'un sistema de distribució d'aigua. Addicionalment, altres problemes com el canvi climàtic, l'estrès hídric i l'emissió de gasos d'efecte hivernacle condueixen a la necessitat d'optimitzar aquest tipus d'instal¿lacions, tant pel que fa al disseny com a l'operació. Aquesta tesi doctoral consta de tres etapes de desenvolupament. La primera etapa desenvolupa una metodologia d"optimització de l"operació d"EB. La segona etapa desenvolupa un mètode de disseny d'estacions de bombament considerant aspectes tècnics i econòmics basats en el mètode AHP (Analytic Hierarchy Process, de l'Angles). Finalment, la tercera etapa és una millora de la segona afegint-hi aspectes ambientals i consideració de variabilitat de la demanda. Una de les contribucions principals és el desenvolupament d'una metodologia per optimitzar el funcionament d'una EB. Aquesta metodologia es basa en lús de la corba de consigna i una operació combinant bombes de velocitat fixa (BVF) i bombes de velocitat variable (BVV). L'objectiu d'aquest mètode és determinar el nombre òptim de BVF i BVV en qualsevol cabal minimitzant el consum energètic total de l'EB. Aquesta metodologia corregeix l"eficiència de BVV determinada per les lleis de semblança i inclou una formulació matemàtica de l"eficiència del variador de freqüència. El disseny convencional dEB es basa la minimització del cost del cicle de vida (CCV); suma de costos dinversió, operació i manteniment. La segona etapa de la tesi desenvolupa un mètode integral de disseny d'EB considerant aspectes tècnics i econòmics aplicant el mètode AHP. La metodologia proposada consta de tres fases. La primera fase està relacionada amb la definició de les dades requerides de l'EB i permet definir els models factibles per a la xarxa. La segona fase està relacionada amb la definició de les possibles solucions i la seva avaluació amb criteris tècnics i econòmics. La tercera fase està relacionada amb el càlcul del front de Pareto del conjunt de solucions obtingudes i laplicació del mètode AHP. La metodologia desenvolupada a la segona etapa de la tesi presenta quatre limitacions. La primera és no considerar els criteris mediambientals en el disseny de lEB. La segona és no considerar l'optimització del funcionament d'una EB definit a la primera etapa. La tercera està relacionada amb l'escala utilitzada al mètode AHP. La quarta és la consideració d'un únic patró de consum a l'estació de bombament. Per això, a la tercera etapa de la tesi es desenvolupa una nova proposta de metodologia de disseny d'EB que pretén resoldre aquests problemes. Aquest nou mètode considera criteris mediambientals com el MEI, les emissions amb efecte d'hivernacle o l'eficiència del mètode de regulació a l'EB. El mètode també inclou una proposta de modificació de l'escala tradicional de valoració clàssica de l'AHP. Les metodologies proposades han estat validades de manera comparativa amb dues xarxes de distribució d'aigua (xarxes CAT i TF). Sobre les dues xarxes es van comparar tant els diferents mètodes proposats com la comparativa amb un plantejament clàssic del problema de disseny d'una EB. En resum, la tesi recull una metodologia estandarditzada per al disseny de qualsevol tipus d'EB (per a aigua potable, per a reg etc.) considerant la configuració de bombament més adequada, fent ús d'una variabilitat de la demanda, i considerant diferents tipus de criteris (tècnics, econòmics i ambientals) mitjançant una anàlisi multicriteri de presa de decisions. / [EN] Energy consumption of a pumping station (PS) represents the largest energy consumption of a water distribution system. Additionally, other problems such as climate change, water stress and greenhouse gas emissions lead to the need to optimize this type of facilities, both in their design and operation. This doctoral thesis consists of three stages of development. The first stage develops a methodology to optimize the operation of the PS. The second stage develops a pumping station design method considering technical and economic aspects based on the AHP (Analytic Hierarchy Process) method. Finally, the third stage is an improvement of the second stage by adding environmental aspects and demand variability consideration. One of the main contributions is the development of a methodology for the optimization of the operation of a PS. This methodology is based on the use of the set point curve and an operation combining fixed speed pumps (FSP) and variable speed pumps (VSP). The objective of this method is to determine the optimum number of FSP and VSP at any given flow rate while minimizing the total energy consumption of the PS. This methodology corrects the VSP efficiency determined by the similarity laws and includes a mathematical formulation of the variable frequency drive efficiency. Conventional PS design is based on the minimization of the life cycle cost (LCC); the sum of investment, operation and maintenance costs. The second stage of the thesis develops an integral method of PS design considering technical and economic aspects by applying the AHP method. The proposed methodology consists of three phases. The first phase one is related to the definition of the required data of the PS and allows defining the feasible models for the network. The second is related to the definition of the possible solutions and their evaluation with technical and economic criteria. The third phase is related to the calculation of the Pareto front of the set of solutions obtained and the application of the AHP method. The methodology developed in the second stage of the thesis has four limitations. The first one is not considering environmental criteria in the design of the PS. The second is not considering the optimization of the operation of a PS defined in the first stage of the thesis. The third is related to the scale used in the AHP method. The fourth is the consideration of a single consumption pattern in the pumping station. Therefore, in the third stage of the thesis, a new proposed methodology for the PS design is developed to solve these problems. This new method considers environmental criteria such as MEI, greenhouse emissions or the efficiency of the PS control method. The method also includes a proposed modification of the traditional AHP classical rating scale. The proposed methodologies have been comparatively validated with two water distribution networks (CAT and TF networks). For both networks, both the different proposed methods and their comparison with a classical approach to the design problem of a PS were compared. In summary, the thesis presents a standardized methodology for the design of any type of PS (for drinking water, irrigation, etc.) considering the most appropriate pumping configuration, making use of demand variability, and considering different types of criteria (technical, economic and environmental) through a multi-criteria decision making analysis. / Briceño León, CX. (2023). Contributions to the design of pumping stations in water distribution networks considering technical, economic and environmental aspects [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/193080 / Compendio
242

台灣之兩岸發展優選策略之研究-應用層級分析法 / Study on the Slection of an Optimal Cross-Strait Development Strategy of Taiwan - Application of Analytic Hierarchy Process

劉豐壽, Liu, Feng-Shou Unknown Date (has links)
兩岸發展競爭力消長,最近數年來尤為明顯。據瑞士洛桑管理學院(IMD)2007年全球競爭力評比,台灣排名自2005年之第11名滑落至2007年之第18名;中國大陸則由31名提升到第15名,首度超越台灣。彼長我消之因素頗多,牽涉問題亦深且不易解。例如兩岸的統獨之爭,國內的內閣更迭波潮不斷,及政局穩定度、政策一致性、社會凝聚力,以及投資誘因力道等表現相對脆弱。相對於中國大陸,則是彼岸發展處於強勢有利時期,正所謂對岸屬「政經和諧」時期,台灣則處於「政熱經冷」時期,而兩岸間亦依舊停留於「政冷經熱」階段。對岸目前所走的路線恰好是台灣三、四十年前以「經濟為導向」的發展途徑,此為兩岸政、經發展消長最明顯的地方。縱使台灣在自由民主、發明專利、通膨水準、高科技產品、科技人才仍占有優勢,亦或政府大力協助廠商布局全球,如果兩岸未能和諧發展,則仍將難於突破當前困境,或競爭力將持續陷入每下愈況的困局。 本論文研究目的主要針對台灣與中國大陸國力發展之消長過程與趨勢,及兩岸互動對台灣是威脅或是機會,探討台灣發展新思維及應採措施,亦即如何趨吉避凶,乃為本論文研究之預期目標。本論文首次引用決策模式──層級分析法(Analytic Hierarchy Process, AHP),將兩岸複雜問題系統化,以簡易之結構化思考架構下,由不同層面給予層級分(析)解,讓決策者迅速研判台灣之兩岸發展之優選策略,或據以實施。首先以過去有關兩岸政治、經濟、國防、外交等政策文獻,作為構思研擬台灣當前與未來急需優先採行的重大策略後,隨即親訪產、官、研專家,擬訂AHP層級分析法問卷調查所需問題界定,構建層級結構。即第一層為全方位優選策略,第二層為政治和諧(I1)、經濟發展(I2)、國防安全(I3)與全球化(I4)等四大主題,第三層為各主題內之各子(次要)項(各細分五子項,合計20子(次要)項)。 AHP層級分析法略以總群(組)體(total)、偏經濟專長大於40歲(eco>40)及小於四十歲(eco<40)、偏政策專長大於40歲(pol>40)及小於40歲(pol<40)等五個分類組別,輸入計算軟體結果分析比較得知,不論總群體組或不同各次群組,即不分何種專長、年齡層都以經濟發展(I2)為首選指標,其餘三大主題(項)依次為國防安全、全球化及政治和諧,但彼此權重之高低卻在伯仲之間(詳本論文第四章第三節結果分析)。足見且印證了經濟發展是當前兩岸發展中台灣之首要任務,亦為國內人民、企業界和國外世界級跨國管理大師之共同關注焦點。 本論文採用文獻及當前問題趨勢分析,配合訪談及應用「層級分析法」結果,顯示層級分析法是一種簡易又便捷的優選決策工具。不但可免去一般繁複卷數、人力之累,且其分析結果雖僅具少數專家卓見,卻能充分反映多數人的看法和企求目標,也頗符合「二八法則」管理關鍵原則,值得推廣應用。本論文研究之結論與建議事項,或可提供有關當局施政之參考。 / The rise and fall of competitiveness between China and Taiwan has fluctuated dramatically in recent years. According to the latest IMD World Competitiveness Scoreboard 2007 (published on May 10th 2007), the ranks of Taiwan dropped from 11th in 2005 to 18th in 2007. On the contrary, China’s rank increased from 31st to 15th in the corresponding period of time. This is the first time China’s ranking overtook Taiwan. There are a lot of factors involved of the rise in China and the fall of Taiwan; the problems involved are complicated and hard to solve. There are numerous examples, such as the disputes about Taiwan’s cross strait status, the frequent change of the cabinets in Taiwan, as well as the political instability, policy inconsistency, the social cleavage, and the lack of attraction for investment in Taiwan. These problems have only improved a little when they are compared to China’s progress. China is in the stage of fast development, and both of the political and economical circumstances are in harmony. In contrast, the Taiwan government has focused on political issues rather than how to solve economical problems in the recent years. In addition to this, the cross-strait issues focus more on economical than political issues. Now, the road taken by China, happens to be the road that was taken by Taiwan government, which emphasized “economical-oriented policies” 30 to 40 years ago. This is the most noticeable aspect of the comparison of political and economical development across the strait. Taiwan has the advantage in freedom, patents, the inflation situation, high-tech products, and technology elites. The Taiwan government also spares no effort in assisting companies’ global layout. If the cross-strait situation cannot be improved, the current situation will be difficult to solve. In the end, the competitiveness of Taiwan will worsen. The target of this thesis lies on analysis of the process and tendency of rise and fall of national power across the strait, as well as discussion about whether or not cross-strait cooperation is a threat or an opportunity for Taiwan. It discusses the new thinking and measures of development that Taiwan should take. In other words, how to make good decisions and avoid bad policies is the goal of this thesis. This is the first time the Analytic Hierarchy Process (AHP) is adopted to systematize complicated problems cross strait. By using simplified structural thinking, different levels of problems are analyzed by the AHP. This way, policy makers can judge what are strategies are better to take for cross strait development, and may put them into practice in the future. In the beginning of this thesis, documents concerning cross-strait political affairs, economy, national defense, and foreign affairs were used as references to design major strategies that needed to be solved presently and in the future in Taiwan. Later, experts from industries, the government, and the research field were interviewed to design questions in the survey according to the AHP, and to make the structure of different levels. The first level is about policies in priority in every aspect. The second one is about political stability (I1), economical development (I2), national security (I3), and globalization (I4). The third level is about sub-items of each item (five sub-items of each and 20 sub-items in total). The AHP was divided into five groups: total, those with the specialty over 40 years of age (eco>40) and under (eco<40), those with the specialty of policy-making over 40 years of age (pol>40) and under (pol<40). After the five classified data was analyzed by computer software, the result showed that both the total and different sub-groups, people in different ages and with different specialties, all chose economic development (I2) as their choice in priority. The other three selective items in order were national security, globalization, and political stability. However, the differences among them were very slim (Please refer to the results and analysis in Chapter 4.3). This proves that economic development should be the primary mission in current cross-strait development. It is also a common concern by the people, companies, and international masters of management. In this thesis, documents and the current problems according to the AHP were adopted. With the interviews and results from the AHP, it showed that AHP is an easy and convenient tool to make prioritize policies. It not only can save the time and efforts of giving out large numbers of the survey, but the result can truly reflect opinions and goals pursued by the majority, even though only the opinions of a limited number of experts were taken. This also meets the 80/20 principle of the crucial rule of management. Meanwhile, it can also draw conclusion and suggestions in this thesis in providing policy-making references to the government. It shall be promoted and applied with great exertion.
243

臺北市公有路邊停車場經營管理機制評選之研究 / Ranking and Selecting the Management of Taipei ,s Public Curb Parking Lot

陳美珍, Chen, Mei Chen Unknown Date (has links)
這篇論文主要是要建構一個在考慮經濟面及效率面下,評估公有路邊停車場經營管理績效的機制。當考慮經濟面及效率面時,包含權利金委外、開單勞務委外及人力派遣與政府自辦的比較,何者較具有經營管理優勢。本文選擇以這四個制度為分析對象的理由,主要是源自於公共選擇理論。另外,評估方法則應用層級分析法來評估這四個經營管理機制。而在考慮經濟與效率為目標下,評估指標分別從投入與產出這二個面向著手,其中投入面向之評估指標有人力、設備及費用,產出面向之評估指標則有每格位開單率及每人每日營收金額等。以臺北市西門地區做為實證分析對象,透過問卷調查24名專家學者對評估指標的權重,再以簡單加權法求算各個替選方案評點,研究結果發現,開單勞務委外為最優方案,其次為權利金委外,而政府自辦在經濟及效率面向,與其他三個方案比較結果,顯示最不具有經營管理優勢。 / This thesis is aimed at construct the scheme of evaluating the management economy and efficiency for public curb parking lot. Those which draw up the parking charge list including of royalty, labor-outsourcing and leased work, are compared with the government manages oneself, when consideration economy and efficiency which alternative has the superiority of operation and management. The rationale to choice these four alternatives as evaluative object is the public choice theory. Moreover, the consideration of performance evaluation has three indicators such as manpower, facility and expenditure under the schema of input, and two indicators such as the rate of draw up the parking charge list for a parking space and each person of daily earning under the schema of output. Further, analysis hierarchy process and SAW are applied for the appraisal method. In empirical study, 24 experts replied our questionnaire survey. The result suggest that the priority alternative is labor outsourcing and the government manages oneself is inferior to other three alternatives. We develop a framework to promote a better understanding of the important of public curb parking lot performance management. Using the review literature and the results an empirical study of Taipei’s curb parking lots, we developed the framework presented herein, in hope that if would stimulate more interest in this area.
244

政府網站服務品質指標建構之研究

周思伶 Unknown Date (has links)
當政府機關開始大量的透過網路傳遞服務給民眾,政府迫切需要知道民眾對政府網站服務品質的認知評價為何。然而該如何衡量政府網站的服務品質至今仍沒有一個明確的方法。本論文旨在建構一套可以用來衡量政府網站服務品質的指標同時對政府網站服務品質提出相關的政策建議。本研究使用了線上問卷調查法與層級分析法,利用網路問卷線上調查了使用者對政府網站服務品質的評價,然後請專家利用層級分析法分析並計算出這些指標的相對權重。 本研究主要結果如下:(1).建構適合衡量台灣政府的網站服務品質指標,包含「設計性」、「易用性」、「可靠性」、「資訊品質」、「有用性」與「回應性」六大構面,而六大構面下共包含三十項指標;(2).實際調查台灣網路民眾對政府網站服務品質評價,發現民眾對政府網站服務品質的「有用性」相對評價最高,而對政府網站「回應性」的服務品質則是相對最不肯定;(3).請專家透過層級分析法對政府網站服務品質指標做出重要性權重排序,整體而言,專家給予「資訊品質」相對最高的權重,後依序是「有用性」、「回應性」、「可靠性」、「易用性」,而「設計性」則是專家排序中相對最不重視的;(4).比較專家與民眾對政府網站服務品質指標重要性與評價的差異,發現就評估構面而言,「資訊品質」與「回應性」是專家認為相對重要,但民眾基於使用經驗相對不肯定的指標,應該列為政府提昇網站服務品質優先改善的構面 基於上述研究發現,作者提出了隨時檢視資訊更新程度、替使用者重新編寫資訊與強化政府網站的回應能力等三點研究建議,以期待徹底提昇政府網站的服務品質。 / As government organizations have increasingly provided services to the public via Internet, e-government websites have demanded acute understanding of how the users perceived the service quality. However concerning it is not clear how the e-service quality of e-government websites can be measured. This thesis aims to construct the indicators to evaluate e-service quality of e-government websites and propose management suggestions to government. The research methods of this thesis include an online survey and Analytic Hierarchy Process (AHP). A survey was conducted with online users being asked to evaluate the e-service quality of e-government websites. Then AHP was applied to analysis and compute the weights of these indicators from the experts. The key findings are: First, Design, Usability, Reliability, Information Quality, Usefulness, and Responsiveness are key dimensions of e-service quality of e-government in Taiwan. Second, most of the online users are satisfied with the Usefulness of e-government websites in Taiwan, but they are not satisfied with the Responsiveness of e-government websites in Taiwan. Third, for the evaluation aspects, the sequence of importance for the e-service quality of e-government websites in Taiwan is Information Quality, Usefulness, Responsiveness, Reliability, Usability and Design. Among them, the domain experts think Information Quality and Responsiveness are relatively important aspects of e-service quality of e-government websites in Taiwan. However, general online users are not satisfied with these two aspects. So these two aspects should be listed on the top priority for improvement straight away. Based on the research findings, the author proposes three policy suggestions to improve the websites in Taiwan’s government. First, keep the information on the government websites most updated. Second, improve the information readability for online users. Finally enhance the responsiveness of government websites.
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Estruturas flutuantes para a exploração de campos de petróleo no mar(FPSO): apoio à decisão na escolha do sistema. / Decision aid methods applied to the selection of floating production storage and offloading system.

Garber, Marcos Fernando 17 December 2002 (has links)
Freqüentemente os profissionais da construção naval tomam decisões para selecionar os elementos que devem ser especificados na composição de determinado projeto. Além da experiência e do conhecimento necessários para optar por um caminho adequado, a escolha deve atender eficientemente ao problema proposto e às preferências do projetista. A seleção de componentes do projeto de estruturas flutuantes para exploração de campos de petróleo no mar envolve aspectos objetivos e subjetivos. O trabalho apresenta e aplica alguns métodos de auxílio à tomada de decisão possibilitando ao projetista aprimorar sua sensibilidade. O objetivo da pesquisa é apresentar de forma sumária as duas bases para a decisão sobre o projeto, que são os métodos de apoio e os requisitos que as instalações FPSO devem atender, fornecendo como resultado um procedimento que permitirá aos usuários a melhor escolha dos componentes e aumentar a sensibilidade dos projetistas na seleção entre as possíveis opções (fazer totalmente novo ou aproveitar o existente). O trabalho apresenta uma revisão dos princípios da análise da decisão, informações sobre métodos de apoio à decisão, os dados de entrada do problema proposto, o método de projetos navais, os requisitos básicos para construção de estruturas flutuantes de exploração de petróleo no mar e os requisitos básicos para uma instalação FPSO. Para a solução do problema se aplicaram os métodos de árvore de decisão, para a parte correspondente às decisões sob risco e o método de análise hierárquica AHP para as decisões tomadas sob certeza. / Frequently, naval construction engineers take decisions to select the elements which must specified for the composition of a determined project. Besides the necessary experience and the knowledge to choose a proper way, the option must fulfil efficiently the problem requirements and the preferences of the designer. The choice of components in the design off-shore structures for production in sea oilfields, involves objective and subjective aspects. This work introduces and uses a few methods of decision aids, helping the designer to improve his sensibility. The objective of this research is to present in a simple way two foundations to decide about the project, which are the aid decision methods and the requirements which the FPSO (Floating Production Storage and Offloading System) must fulfil, supplying a procedure that enables the designer to take the best choice of components and to increase his sensibility referring to the selection among the possible options, wich are to make a completely new FPSO or to use an existing one. This work offers a revision of the principles of the decision analysis theory, the data input of the problem, the classic naval design method, the basic requirements to build floating structures to off-shore oil extraction, and the basic requirements for a FPSO installation. To solve the problem the decision tree method, for decision under risk, and the AHP (Analytic Hierarchy Process), for decision under certainty, were applied.
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Modelagem em SIG da fragilidade ambiental para o processo de eutrofização antrópica em reservatórios tropicais / A GIS-Based Model to access the environmental fragility to human-induced eutrophication in tropical reservoirs

Martins, Iris Amati 14 September 2017 (has links)
Os sistemas naturais e humanos são considerados sistemas integrados, com interações complexas e de caráter fortemente multidisciplinar. A abordagem da limnologia da paisagem, como um princípio holístico para avaliar as relações complexas entre a bacia de captação e o reservatório, é de grande importância na produção de diagnósticos consistentes. O modelo de tomada de decisão foi produzido por meio de literatura especializada, conhecimento de especialistas, Processo Hierárquico Analítico (AHP) e Avaliação Multicritério (MCE). O modelo foi desenvolvido para atuar em escala da paisagem, considerando a bacia de captação como a escala observacional. Foram selecionados sete critérios (variáveis preditoras) para determinar o grau de fragilidade ambiental para o processo de eutrofização antrópica em reservatórios tropicais: Variáveis Intrínsecas do Reservatório: (1) morfometria (profundidade) e Tempo de Retenção (RT); (2) Variáveis Limnológicas: Zona Eufótica e presença de macrófitas de crescimento intensivo; (3) Variáveis Antrópicas: Fonte de Poluição Difusa Potencial; e (4) Variáveis Hidrológicas: Taxa de Sedimentação e escoamento superficial potencial. No processo de ponderação das variáveis, todas as matrizes foram consistentes e os especialistas priorizaram o Escoamento Superficial potencial e a Fonte de Poluição Difusa Potencial com os principais responsáveis pelo processo de eutrofização antrópica. Apesar dos critérios e pesos serem fixos para os reservatórios tropicais, existe a possibilidade de ajuste do modelo de acordo com situações especiais, já que o modelo é flexível suficiente para ser utilizados em outras bacias de captação, com características diferentes e intrínsecas. O modelo também é adaptável em função da disponibilidade de base de dados / The human and natural systems are integrated systems, with complex interactions and a strong multidisciplinary character. The application of landscape limnology, as a holistic principle to address the complex relationships between the watershed and reservoir, are of great importance to produce consistent diagnoses and predictions. The GIS-based model was performed by using literature, expert knowledge, Analytical Hierarchy Process (AHP) and Multi-Criteria Evaluation (MCE). The model was performed in a landscape scale considering the watershed as the observational scale. We selected seven criteria (predictor variables) to assess the environmental fragility to human-induced eutrophication in tropical reservoirs: (1) Intrinsic Reservoir Variables: morphometry (depth) and Retention Time (RT); (2) Limnological Variables: euphotic zone and intensive-growth macrophytes presence; (3) Anthropic Variable: Potential Non-Point Source (NPS); and (4) Hydrological Variable: Sedimentation Rate and Potential Runoff. In the weighting process, all matrices were consistent and the experts prioritized the potential runoff and potential NPS criteria as the main drivers of human-induced eutrophication. Although the criteria and its weights are considered fixed for any tropical reservoir, it is possible to adjust them according to specific situations since the model proposed is flexible enough to be used in different watersheds with different and intrinsic characteristics and adapted according to the database availability
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Condomínios horizontais e loteamentos fechados: uma metodologia de avaliação de desempenho de ambientes coletivos, a partir do caso de Londrina-PR / Gated Communities and Plots: a methodology for evaluating collective environments, from the case of Londrina - PR

Lopes, Paulo Adeildo 27 January 2010 (has links)
Esta tese trata dos ambientes coletivos dos condomínios horizontais e dos loteamentos fechados construídos a partir de 1990 na cidade de Londrina Pr. Busca descobrir quais as necessidades dos usuários (moradores) e, a partir da avaliação de desempenho físico e de satisfação do usuário voltada aos ambientes construídos e de uso coletivo, com ênfase nos aspectos social, funcional, segurança, durabilidade e manutenabilidade, formula procedimentos metodológicos de desempenho de avaliação para dar suporte na definição de programas de necessidades para futuros empreendimentos similares. Propõe um modelo metodológico que encontra suporte no Analytic Hierarchy Process (AHP) para hierarquizar os atributos e as alternativas que influenciam nas decisões de projeto (critérios e subcritérios) e cuja calibragem do modelo se dá por meio da Avaliação Pós-Ocupação (APO), envolvendo os pontos de vista dos moradores, dos administradores ou síndicos, dos autores dos projetos destes empreendimentos, além dos levantamentos in loco realizado pelo pesquisador. / ABSTRACT This thesis deals with collective environments of gated communities and plots which started being built in 1990 in the city of Londrina-PR. It searches for finding out the needs of the users (residents) and, from the evaluation of their physical performance and satisfaction regarding the built and collective environments, with special emphasis on social, functional, safety, durability and maintenance aspects, conceives the methodological procedures of performance evaluation to support the definition of programs of needs for future similar developments. It proposes a methodological model supported by the Analytic Hierarchy Process (AHP) to form as a hierarchy the attributes and the alternatives which have influence on the design decisions (criteria and sub-criteria), whose calibration of the proposed methodological model took place through the Post-Occupancy Evaluation (POE), involving the viewpoints from the residents, the administrators or syndics and architects, besides the surveys in loco carried out by this researcher.
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Condomínios horizontais e loteamentos fechados: uma metodologia de avaliação de desempenho de ambientes coletivos, a partir do caso de Londrina-PR / Gated Communities and Plots: a methodology for evaluating collective environments, from the case of Londrina - PR

Paulo Adeildo Lopes 27 January 2010 (has links)
Esta tese trata dos ambientes coletivos dos condomínios horizontais e dos loteamentos fechados construídos a partir de 1990 na cidade de Londrina Pr. Busca descobrir quais as necessidades dos usuários (moradores) e, a partir da avaliação de desempenho físico e de satisfação do usuário voltada aos ambientes construídos e de uso coletivo, com ênfase nos aspectos social, funcional, segurança, durabilidade e manutenabilidade, formula procedimentos metodológicos de desempenho de avaliação para dar suporte na definição de programas de necessidades para futuros empreendimentos similares. Propõe um modelo metodológico que encontra suporte no Analytic Hierarchy Process (AHP) para hierarquizar os atributos e as alternativas que influenciam nas decisões de projeto (critérios e subcritérios) e cuja calibragem do modelo se dá por meio da Avaliação Pós-Ocupação (APO), envolvendo os pontos de vista dos moradores, dos administradores ou síndicos, dos autores dos projetos destes empreendimentos, além dos levantamentos in loco realizado pelo pesquisador. / ABSTRACT This thesis deals with collective environments of gated communities and plots which started being built in 1990 in the city of Londrina-PR. It searches for finding out the needs of the users (residents) and, from the evaluation of their physical performance and satisfaction regarding the built and collective environments, with special emphasis on social, functional, safety, durability and maintenance aspects, conceives the methodological procedures of performance evaluation to support the definition of programs of needs for future similar developments. It proposes a methodological model supported by the Analytic Hierarchy Process (AHP) to form as a hierarchy the attributes and the alternatives which have influence on the design decisions (criteria and sub-criteria), whose calibration of the proposed methodological model took place through the Post-Occupancy Evaluation (POE), involving the viewpoints from the residents, the administrators or syndics and architects, besides the surveys in loco carried out by this researcher.
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中小企業資訊系統外包採用雲端運算服務之因素探討 / Cloud computing service as an alternative for SME information systems outsourcing: assessing the key factors

陳祺堯, Chen, Chi Yau Unknown Date (has links)
雲端運算(Cloud Computing),是近年來在資訊科技與商業資訊應用領域中,佔有相當重要地位的研究與應用議題。眾多企業的執行長與資訊專家宣稱,雲端運算可降低基礎硬體設施與軟體維護的管理成本,為企業組織帶來新的契機與創造全新的商業模式。並非所有人都對雲端運算有正面的評價,部分專家學者指出,科技公司如Google、Microsoft與Amazon等大力推廣雲端運算,皆為了其利益和提高其現有硬體設備資產之利用度,過度高估雲端運算的價值以吸引企業客戶外包更多資訊系統與資訊應用。而無論雲端運算是否能成為下個世代的潮流,未來電腦發展趨勢,已有趨向集中分散各處的運算資源來完成需要高度運算能力服務之現象。   本研究提出一分析模式,預期讓中小企業(Small and Medium-sized Enterprise ,SME)進行外包資訊系統決策,在採用傳統外包與雲端運算外包此二種模式中做抉擇時,能對可能影響決策之因素進行評比與重要性排序,讓雲端服務提供廠商了解使用者所重視的要點以改善現有的服務與加強其發展的方向。本研究亦蒐集雲端運算的相關文獻與各方評價,以及與雲端運算相關之技術和特性,彙整成為一多面向之因素模型。本研究使用德菲法(Delphi Method)與層級分析法(Analytic Hierarchy Process, AHP),透過製發問卷來濾除模型中不重要之因素與分析因素之間相對的重要程度。本研究之最終研究結果顯示安全性(Security)與穩定性(Stability)兩大面向與相關因素,為中小企業在進行外包決策與選擇服務提供商之優先考量。
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以層級分析法 建構G2B計畫評估架構與指標-從價值鏈觀點出發 / A value-chain approach to build G2B program evaluation framework

楊禮榮, Yang, Li Jung Unknown Date (has links)
近年來,由於ICT的蓬勃發展,政府逐漸增加投資於電子化計畫的線上服務比例與種類,為了理解投資所能獲得的收益,杜絕資源浪費,並促使政府調整施政方向達到良善治理,針對電子化計畫進行評估是勢然必行的。目前許多評估機構逐漸從衡量政府投資電子化政府服務的客觀產出,轉而討論電子化服務使用者端的影響與成果。本研究,以計畫整體流程中所面臨的內部運作與外部感受、客觀產出與抽象成果的評估構面,提出G2B電子化計畫流程評估架構。 本研究結合Heeks (2006)的價值鏈模型與Millard & Shahin (2006)電子化計畫評估流程建立流程模型,透過文獻整理出評比國家型、網頁感知品質型、滿意模型與利害關係人模型指標,從企業途徑與政府內部途徑角度,探討G2B計畫流程評估架構,並使用層級分析法(analytic hierarchy process),由專家給予衡量G2B計畫推動時,前端到後端階段中重要構面的權重,並根據分析結果討論現今台灣計劃評估傾向上的差異。 本研究結果發現,在政府計畫生產過程中,應重視政府領導與支持,並發展衡量方式;專家不論在企業途徑與政府內部途徑上,都認為「服務產出評估是必需的過程,但影響與成果階段,才是價值衡量的終點」,因此,電子化計劃評估應從重視成本比的角度,朝向討論「透過政府對計畫服務的投入與投資,所能帶給企業實際或感知的價值與影響」,更能切中利害關係人關注的關鍵利益。 / This study aims at building an e-program evaluation chain model combining output evaluation with impact assessments, in order to assess the comprehensive G2B e-program from back-office process to the impact of online services. This study contributes a G2B evaluation framework with six processes integrated by e-government value chain model and e-program evaluation process. Given the concept of external and internal customer,「Business approach」and「Internal-Government approach」is developed in view of stakeholders. By evaluating subjective expert judgments via analytic hierarchy process method, this G2B evaluation framework is given weights and priorities in each hierarchy under both of approaches. The results indicate that impact and outcome assessments should be emphasized, no matter which approach is. Evaluation toward objective output is only a necessary process, but not the destination. As policy suggestions, this study addresses that government should focus on what kinds of value e-program can bring, and evaluate them.

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