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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.
51

Limnologia da paisagem com uso de regressão geograficamente ponderada: estudo da qualidade da água na represa de Chapéu D’Uvas, MG

Oliveira, Márcio de 28 February 2018 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-06-18T13:56:01Z No. of bitstreams: 1 marciodeoliveira.pdf: 54067664 bytes, checksum: a5c84df2cc84ff15fc4881a06fd4f6ae (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-09-03T16:07:04Z (GMT) No. of bitstreams: 1 marciodeoliveira.pdf: 54067664 bytes, checksum: a5c84df2cc84ff15fc4881a06fd4f6ae (MD5) / Made available in DSpace on 2018-09-03T16:07:04Z (GMT). No. of bitstreams: 1 marciodeoliveira.pdf: 54067664 bytes, checksum: a5c84df2cc84ff15fc4881a06fd4f6ae (MD5) Previous issue date: 2018-02-28 / A represa de Chapéu D’Uvas é um importante manancial de abastecimento público para o município de Juiz de Fora, MG, sendo a expectativa de garantia de água para as próximas décadas em quantidade e qualidade. Ao longo dos anos a bacia de contribuição da represa vem passando por um processo de ocupação antrópica, sendo preocupante a possibilidade de impactos sobre o manancial. A pesquisa aqui apresentada teve por objetivo identificar as relações espaciais entre o uso e cobertura da terra na bacia de contribuição da represa de Chapéu D’Uvas e a qualidade da água do reservatório. A metodologia passou por um estudo com sensoriamento remoto e geoprocessamento para conhecimento das condições de uso e cobertura da terra, e da manutenção das áreas de preservação permanente. Foram analisados dados históricos de qualidade da água no ponto de captação fornecidos pela Companhia de Saneamento Municipal de Juiz de Fora, Cesama, relativos aos anos de 2005 a 2017. Também foram realizadas campanhas para amostragem na represa e nos principais tributários, nos anos de 2016 e 2017. Os dados de uso e cobertura da terra e de qualidade da água foram analisados a partir dos princípios da limnologia da paisagem e com a aplicação da regressão geograficamente ponderada. Os resultados mostraram como as variáveis densidade de cianobactérias, E. coli, condutividade elétrica, oxigênio consumido, ortofosfato, nitrato e demanda química de oxigênio foram influenciadas, principalmente, pelo percentual de áreas de mata, pastagens, silvicultura e área urbanizada. A declividade média das subbacias também influenciou nos resultados. A ponderação geográfica diferenciou as influências das sub bacias conforme sua posição mais próxima ou mais afastada da barragem. Desse modo, por meio da análise das correlações entre as variáveis, foi possível identificar os efeitos da ocupação da bacia de contribuição sobre a qualidade da água, e, assim, relacionar as principais questões que merecem atenção dos gestores do manancial. / The Chapeu D'Uvas dam is an important source of public water supply for the municipality of Juiz de Fora, MG, with the expectation of guaranteeing water for the coming decades in quantity and quality. Over the years the watershed of the dam has undergone a process of anthropic occupation, being worrying the possibility of impacts on the source. The research presented here aimed to identify the spatial relationships between land use and land cover in the watershed of the Chapeu D'Uvas dam and the water quality of the reservoir. The methodology underwent a study with remote sensing and geoprocessing to know the conditions of use and land cover, and the maintenance of permanent preservation areas. Historical data on water quality at the catchment point provided by the Companhia de Saneamento Municipal de Juiz de Fora, Cesama, were analyzed for the years 2005 to 2017. Campaigns were also conducted for sampling at the reservoir and at the main tributaries, in the years 2016 and 2017. Data on land use and land cover and water quality were analyzed from the principles of landscape limnology and the application of geographically weighted regression. The results showed that the variables density of cyanobacteria, E. coil, electrical conductivity, oxygen consumed, orthophosphate, nitrate and chemical oxygen demand were influenced mainly by the percentage of forest, silviculture, pasture, and urbanized areas. The longitudinal profile of the sub basins also influenced the results. The geographic weighting differentiated the influences of the sub basins according to their position closest to or farther from the dam. Thus, through the analysis of the correlations between the variables, it was possible to identify the effects of the occupation of the basin of contribution on water quality, and, thus, to relate the main issues that deserve attention of the managers of the source.
52

A Social-Ecological Understanding of Urbanization: A Case of Wuhan, China

Zhang, Li Qin 27 September 2021 (has links)
Since the introduction of economic reforms in the late 1970s, China has experienced phenomenal economic growth along with rapid urbanization. The accelerated urbanization coincides with remarkable social-economic transformations and urban landscape changes. A city, as an urban system, is composed of social and physical subsystems that interact with each other. Equally assessing each component is necessary for a comprehensive understanding of the urbanization process. The goal of this thesis research is to deconstruct the urbanization process through a social-ecological perspective. More specifically, this study examines social transformations, physical evolutions, and their relationships. Four research questions are proposed as (1) How does urban social landscape transform in time and space? (2) What trends are apparent in the urban land growth process and spatial heterogeneity? (3) How does social transformation relate to urban land growth, within a spatio-temporal perspective? and (4) How do social-demographic features relate to residents’ use and perception of urban green open spaces, focusing on the ecological services provided by and the need to improve those spaces? Given the lack of research on second-tier cities’ growth processes, this study selects Wuhan, a megacity in central China, as a case study, with a focus on its urban development zone (UDZ). A social-ecological approach is applied to study the multi-dimensional features of an urban system. The thesis is in paper format, containing five chapters. Besides the Introduction (Chapter 1) and Conclusion (Chapter 5), the main body consists of three articles. These three articles correspond to the four research questions proposed. Chapter 2 responds to the first research question by addressing how the urban social landscape transforms. Chapter 3 seeks to answer the second and third questions by evaluating urban land growth and its links with social factors from a spatio-temporal perspective. Chapter 4 matches the fourth question by seeking to understand residents’ preferences and feelings toward the urban green open space. Chapter 1 introduces the research context, reviews the urban ecology theory and relevant empirical research, as well as assesses the social-ecological approach related to studying the urban system. In this chapter, we also propose an improved social-ecological system (ISES) framework which guides the equally weighted study of both social and physical subsystems in an urban area. Chapter 2 (the first paper) seeks to investigate progressive transformations in the social dimensions of Wuhan UDZ while also focusing on their spatial transformations, using national census data in 1990, 2000, and 2010. We used varimax rotated principal component analysis (PCA) for the extraction of social dimensions and ArcMap for spatial visualization. This allows us to further analyze the spatial distribution of social clusters. The results suggest that industrial relocation, educational attainment increase, population aging, and migration are the main characteristics of social transformation during 1990 and 2010. Industrial relocation along with the spatial separation appeared as principal social dimensions in the 1990s but became more prominent in the 2000s, accompanied by the improvement of workers’ education levels. Aging population presented spatial movement outward from the city center. Population mobility increased significantly, and immigration became an important social dimension and presented spatial expansion in the 2000s. The socio-spatial patterns transform with a combination of concentric rings and sectoral clusters in different stages. These transformations are formed by the regional push-pull forces and the centripetal-centrifugal forces inside the city. We conclude that the social landscape transforms in a way with diversity and inclusion. Government dominates socio-spatial transformations in the initial stages, while market plays an increasing role in the later stages. To build a more inclusive society requires continuous and systematic improvement of relevant policies. Chapter 3 (the second paper) discusses urban land growth patterns and answers how social factors are associated with the evolution patterns between 1990 and 2010. We extract land cover information based on Landsat images with the vegetation area – impervious surface –water area (V-I-W) model and examine the urban growth patterns during various stages using landscape metrics of the area, aggregation, and shape. Then, we apply geographically weighted regression (GWR) to depict the link between urban land metrics and social factors. The results show that urban land coalescence and diffusion simultaneously exist; the city center is dominated by redevelopment, infilling, edge expansion; and the peripheral areas by outlying expansion. GWR coefficient surfaces show little differences in the models between social factors and urban land area metrics PLAND while remarkable differences are present in the coefficients of GWR models for the urban land patch shape irregularities and social factors. Urban land growth patterns relate to the government-led land supply system, the functional zoning of urban space planning, and the agglomeration and dispersion of social space under the market orientation. The authors conclude that urban management should consider the coexistence of different spatial growth modes and introduce factors such as social preferences in the urban land layout. This may apply to rapidly urbanizing areas. Chapter 4 (the third paper) aims to understand social-natural relationships, with a focus on how socio-demographic features can shape residents’ preference toward green open spaces and their perceptions of ecological services and improvements. Data is collected through online questionnaire surveys and interviews. The results indicate that preferences toward green open spaces vary among different social groups. Demands for improvement to green open spaces are rooted in residents’ appreciation for daily relaxation and health benefits, and link with their preference for visiting. However, how residents perceive green open spaces’ benefits does not rely only on an in-person visit. Interaction experience with nature and knowledge of natural development affect perception of daily use and health-related services. Residents’ perceptions of green open space’s ecological functions are associated with the changes in nature reported by those respondents. Responses to improving green open space reflect the residents’ pursuit of the aesthetics and practicality of such spaces. Though respondents are commonly aware of the ecological importance of green open space, there are differences in their willingness to voluntarily participate in its management. We conclude that to encourage the public to participate in configuration and improvement of green open spaces through a variety of ways, including considering residents’ opinions, is an efficient way in order to better social-ecological relationships. Chapter 5 reviews the main findings and conclusions, research limitations as well as future possibilities. This study establishes a dialogue between urban social and physical subsystems, with an integrated quantitative study of the urbanization process, emphasizing the relationships between two urban subsystems. It provides a comprehensive social-ecological view on a second-tier city based on the social and physical transformations that occurred in Wuhan during a transitional period of a socialist market economy. We conclude that the development of China's second-tier cities between 1990 and 2010 is characterized by the transformations of social dimensions and landscape, the coexistence of multiple urban spatial development modes, and the spatial differentiation between the center and the periphery of the city. The GWR models present spatial non-stationary relationships between social factors and the urban patch shape regularities. The further examination of social-natural relationships finds that residents’ social-demographic features and environmental experience affect their perceptions toward green open space, especially ecological services and improvement necessity. The evolution of urban social and physical systems and their relationships has brought increased attention to inclusive urban social management, public participatory planning, and people-centered social and ecological interactions. This research provides a constructive rethinking of second-tier cities’ growth in China and may serve as a reference for other rapidly urbanizing areas.
53

Développement d'une stratégie de regroupement dynamique d'actions de maintenance pour un système de production géographiquement dispersé / Development of a dynamic grouping maintenance strategy for a geographically dispersed production system

Nguyen, Ho Si Hung 10 September 2019 (has links)
Ces dernières années, un nouveau type de système de production nommé système de production géographiquement dispersé (GDPS) est prôné par de nombreuses entreprises manufacturières internationales. Par cette vision « dispersée », il présente un certain nombre d'avantages tels que l'économie des coûts du produit livré (puisque proche des clients), l'amélioration de la qualité des services (délais de livraison courts, services après-vente de haute qualité) favorisant la pérennité et la compétitivité des entreprises dans un contexte de compétition mondiale. Cependant l’exploitation multi-sites d’un GPDS est confronté à de nombreux défis concernant les normes, les réglementations, la maîtrise des flux de production, et en particulier la planification et l'optimisation de la maintenance en raison de la dispersion géographique des sites de production. Sur ce dernier point et plus globalement la définition d’une stratégie de maintenance adaptée au GDPS, peu d'études ont été menées compte tenu de la jeunesse du sujet et de la complexité des GDPSs (ex. multi-sites, multi-composants). Cette thèse se positionne donc sur ce sujet émergeant avec comme objectif de développer une stratégie de maintenance de regroupement dynamique pour un GDPS en tenant compte de dépendances à la fois aux niveaux composants et sites de production (dépendances économique et géographique) et des impacts des contextes dynamiques (à savoir, taux de détérioration variable des composants, modification des itinéraires de maintenance, possibilités de maintenance, etc.) auxquels il est soumis. Dans cette stratégie, les itinéraires de maintenance et l'ordonnancement sont considérés conjointement dans un modèle global. Le modèle vise à trouver un plan optimal de maintenance et de routage des ressources de maintenance. A cette fin, une structure de coûts et un modèle de dépendance qui prend en compte conjointement la dépendance économique et géographique sont formulés. Ils servent de base à l'élaboration du modèle global de planification et d'ordonnancement de la maintenance et du routage. De plus, pour la recherche de la solution optimale, des algorithmes d’optimisation basés sur l'algorithme génétique et l'algorithme Branch and Bound sont proposés. Enfin, une étude numérique est investiguée pour évaluer la performance, les avantages et aussi les limites de la stratégie proposée. / In the recent years, the Geographically Dispersed Production System (GDPS) with a number of advantages such as saving the product delivered costs (closed to the clients), improving quality of services (short delivery time, high quality after-sales services) has been extensively developed by many manufacturing companies to ensure their competitiveness. In operation, the GPDS faces many challenges concerning standards, regulation, production management, and especially maintenance planning and optimization due to the geographical dispersion of production sites. However, few studies have been developed for maintenance strategies of GDPSs. To face this challenge, the main objective of this thesis is to develop a dynamic grouping maintenance strategy for a GDPS with consideration of dependencies between at both component and site level (economic, geographical dependencies) and impacts of dynamic contexts (i.e. varying deterioration rate of components, change of maintenance routes, maintenance opportunities, etc.). In this strategy, maintenance routing and scheduling are jointly considered in a global model. The model aims at finding an optimal maintenance and routing plan. For this purpose, a cost structure and a dependence model jointly considering economic and geographical dependence are formulated. They are used as a basis for the development of the global model of maintenance routing and scheduling. In addition, to find a joint optimal maintenance and routing plan, advanced algorithms using jointly Genetic Algorithm and Branch and Bound are proposed. Finally, a numerical study is investigated to evaluate the performance and the advantage as well as limits of the proposed maintenance strategy.
54

Vliv demografických změn na technickou infrastrukturu obcí v České republice - případová studie odpadového hospodářství / Impact of demographic changes on municipal technical infrastructure in the Czech Republic - case study of waste management

Rybová, Kristýna January 2018 (has links)
Impact of demographic changes on municipal technical infrastructure in the Czech Republic - case study of waste management Abstract The aim of this study is to quantify the impact of demographic development on the current household production of municipal waste in the Czech Republic and at the same time to compare their influence with the impact of other factors. Based on a literature review and statistical data available for the Czech Republic, a set of 22 explanatory variables concerning structure of population by age, gender, highest education and employment, as well as the size of households, unemployment, purchasing power, population density and basic characteristics of housing was identified in order to explain the production of municipal solid waste, mixed municipal waste and separately collected waste components (glass and plastics). It has turned out that demographic variables, especially the average household size, gender, age, level of education or sector of employment have a statistically significant but rather weak impact on the production of these waste streams. Given that the detailed analysis of the variables indicated that there is a significant spatial variability of these characteristics and that they exhibit spatial non- stationarity, the next step was to analyze the relationship of the...
55

Liens entre activité physique quotidienne et utilisation de l’automobile comme moyen de transport : une étude transversale montréalaise

Parenteau, Nicolas 11 1900 (has links)
Contexte: La réduction de l'utilisation de l’automobile a déjà été identifiée comme étant une intervention populationnelle pouvant promouvoir l’activité physique. Les recherches portant sur la relation entre l’utilisation de l’automobile et l’activité physique utilisent typiquement une variable catégorielle pour décrire le mode de transport, tiennent peu compte du motif de déplacement et n’explorent pas la variation de l’association selon le lieu de résidence. Cette étude utilise à la fois l'activité physique auto-rapportée et objectivement mesurée pour tester l'association entre l’utilisation de l’automobile et l’activité physique totale, tout en tenant compte de ces limitations antérieures. Méthode: Les données de 780 participants provenant de la branche montréalaise de l’étude INTERACT (2018-2019) ont été analysées. Des modèles de régression linéaire ont été construits afin d’examiner la relation entre l’utilisation de l’automobile et l'activité physique modérée-vigoureuse (APMV) totale (auto-rapportée avec transformation logarithmique et objectivement mesurée). Ensuite, le motif de déplacement a été inclus dans ces modèles. Enfin, une régression pondérée géographiquement a permis d’explorer la variation spatiale de l'association entre l’usage de l’automobile et l’APMV. Résultats: La proportion des déplacements effectués en automobile est associée négativement avec l'APMV totale auto-rapportée (coefficient : -0,009, intervalle de confiance à 95% : -0,012 à -0,006) et objectivement mesurée (Coefficient : -0,29 minute par jour, intervalle de confiance à 95% : -0,55 à -0,03). La régression pondérée géographiquement indique une faible variation spatiale de l'association entre l'utilisation de l’automobile et l’APMV totale auto-rapportée. Le nombre de déplacements pour un motif tel que commerce et services est associé à l'APMV totale. Conclusion: Cette étude transversale a démontré une association négative entre l’utilisation de l’automobile et l’APMV totale sur le territoire montréalais. Certains motifs de déplacement sont associés à l’activité physique totale. / Background: Car usage reduction has previously been pointed out to be a population-based intervention promoting physical activity. Previous literature on the car usage-physical activity relation typically uses categorical variables for transport modes, rarely accounts for trip purpose and does not explore the influence of home location on this association. This study uses both self-reported and objectively measured physical activity to test the association between car usage and total daily physical activity, while accounting for previous limitations. Methods: INTERACT data collected in 2018-2019 among 780 participants from the Montreal metropolitan area site were analysed. Linear regression models of self-reported (log-transformed) and objectively measured total moderate-vigorous physical activity (MVPA) were built separately, as a function of car usage. Trip purpose was then included in these models. Finally, a geographically weighted regression (GWR) model was built to explore the spatial variation of the car usage-MVPA association. Results: The proportion of trips made by car showed a negative association with both self-reported (coefficient: -0.009, 95% CI [-0.012, -0.006]) and objectively measured (coefficient: -0.29 minutes per day, 95% CI [-0.55, -0.03]) total MVPA. GWR showed little spatial variation in the car usage-total self-reported MVPA. The number of trips toward certain purposes (e.g. “shops and services”) is associated with total MVPA. Conclusion: This cross-sectional study showed a negative association between car usage and total MVPA in the Montreal metropolitan area. Some trip purpose is associated with total physical activity.
56

Geographically Weighted Regression based Investigation of Transport Policies for Increased Public Transport Ridership : A Case Study of Stockholm / Utvärdering av transportpolicyer för ökat kollektivtrafikresande baserat på geografiskt viktad regression : En fallstudie för Stockholm

Klar, Robert Günther January 2021 (has links)
Public transport plays a vital role in society as the economy, the degree of sustainability and the qualityof life of a city is directly affected by transportation. A shift in modal share towards public transport isassociated with many benefits such as increased air quality and improved space allocation within thecity. To further promote public transport, an appropriate measure of competitiveness is required toevaluate the impact of past and future transport policies. This study introduces the journeys per capitaratio as a new way of measuring public transport competitiveness. Firstly, the key factors affecting thepublic transportation usage rate expressed as the journeys per capita ratio are identified to evaluatethe impact of public transport provider efforts. For this purpose, data for a total of 32 explanatoryvariables and a scope of 218 regions for seven consecutive time frames are collected. Secondly,geographically weighted regression (GWR) – a local regression-based spatial analysis technique – isperformed to test if the journeys per capita ratio is a suitable target variable to predict the impact ofcertain transport supply changes. A traditional global ordinary least square (OLS) model is conductedas well to compare if a local model could be more beneficial. The GWR and the OLS model are trainedwith the data of previous years and tested with data from the consecutive following years. Thirdly,further temporal and socio-economic based cluster analyses are performed to assess the validity andthe explanatory power of the journeys per capita ratio. The conducted analyses reveal that thejourneys per capita ratio is a superior measure for assessing public transport competitiveness.Goodness of fit statistics and estimation results demonstrate that the GWR model has betterprediction accuracy and is more capable of retrospectively predicting the impact of previous transportpolicies. / Kollektivtrafiken har en avgörande roll i samhället då ekonomin, graden av hållbarhet och städerslivskvalité är direkt påverkad av transport. En förändring av transportanvändning från bil motkollektivtrafik är förknippad med flera fördelar, såsom ökad luftkvalitet och förbättrad rumsligallokering inom staden. För att ytterligare främja kollektivtrafik krävs ett lämpligt mått påkonkurrenskraft för att utvärdera effekterna av tidigare och framtida transportpolitik. Den här studienintroducerar resor per capita-förhållanden som ett nytt sätt att mäta kollektivtransportenskonkurrenskraft. För det första identifieras nyckelfaktorerna som påverkar användningsgraden förkollektivtrafik, uttryckt som förhållandet resor per capita för att utvärdera effekten avkollektivtrafikleverantörens insatser. För det här syftet har data för totalt 32 variabler och ett omfångav 218 regioner under sju, på varandra, följande tidsramar har samlats in. För det andra har Geografisktviktad regression (GWR), vilket är en lokal regressionsbaserad rumslig analysteknik, använts för atttesta om resor per capita-förhållanden är en lämplig målvariabel för att förutsäga effekterna av vissatransportförändringar. En traditionell Global ordinary least square model (OLS) har också använts föratt jämföra om en lokal modell är mer fördelaktig. GWR och OLS modellerna har tränats med data fråntidigare år och testats med data från följande år. För det tredje har ytterligare tidsmässigsocioekonomisk baserad klusteranalys utförts för att bedöma validiteten och förklaringsförmågan förresornas förhållande per capita. De genomförda analyserna pekar på att förhållandet resor per capitaär ett fördelaktigt mått för att bedöma kollektivtrafikens konkurrenskraft. Goodness of fit statistics ochde uppskattade resultaten visar att GWR-modellen har en bättre förmåga att göra noggrannaförutsägelser och är mer kapabel att i efterhand förutsäga effekterna av tidigare transportpolitik.
57

以部分法修正地理加權迴歸 / A conditional modification to geographically weighted regression

梁穎誼, Leong , Yin Yee Unknown Date (has links)
在二十世紀九十年代,學者提出地理加權迴歸(Geographically Weighted Regression;簡稱GWR)。GWR是一個企圖解決空間非穩定性的方法。此方法最大的特性,是模型中的迴歸係數可以依空間的不同而改變,這也意味著不同的地理位置可以有不同的迴歸係數。在係數的估計上,每個觀察值都擁有一個固定環寬,而估計值可以由環寬範圍內的觀察值取得。然而,若變數之間的特性不同,固定環寬的設定可能會產生不可靠的估計值。 為了解決這個問題,本文章提出CGWR(Conditional-based GWR)的方法嘗試修正估計值,允許各迴歸變數有不同的環寬。在估計的程序中,CGWR運用疊代法與交叉驗證法得出最終的估計值。本文驗證了CGWR的收斂性,也同時透過電腦模擬比較GWR, CGWR與local linear法(Wang and Mei, 2008)的表現。研究發現,當迴歸係數之間存有正相關時,CGWR比其他兩個方法來的優異。最後,本文使用CGWR分析台灣高齡老人失能資料,驗證CGWR的效果。 / Geographically weighted regression (GWR), first proposed in the 1990s, is a modelling technique used to deal with spatial non-stationarity. The main characteristic of GWR is that it allows regression coefficients to vary across space, and so the values of the parameters can vary depending on locations. The parameters for each location can be estimated by observations within a fixed range (or bandwidth). However, if the parameters differ considerably, the fixed bandwidth may produce unreliable or even unstable estimates. To deal with the estimation of greatly varying parameter values, we propose Conditional-based GWR (CGWR), where a different bandwidth is selected for each independent variable. The bandwidths for the independent variables are derived via an iteration algorithm using cross-validation. In addition to showing the convergence of the algorithm, we also use computer simulation to compare the proposed method with the basic GWR and a local linear method (Wang and Mei, 2008). We found that the CGWR outperforms the other two methods if the parameters are positively correlated. In addition, we use elderly disability data from Taiwan to demonstrate the proposed method.
58

不動產評價之空間計量與地理統計 / Spatial Econometrics and Geostatistics for Real Estate Valuation

陳靜宜, Chen, Jing Yi Unknown Date (has links)
近年來由於地理資訊系統(GIS)的快速發展發,空間資料分析開始受到重視並在社會科學領域中逐漸扮演重要的角色。雖然一般的統計方法已在傳統資料分析上發展已久,然而它們卻不能有效地說明空間性資料,並且無法充分處理空間相依或空間異質性問題。一般而言,空間資料分析主要有兩個分派:模型導向學派與資料導向學派。本文研究目的在於應用空間統計方法合理且充分地評估房地產價值,研究方法包含地理統計(克利金和共克利金)、地理加權迴歸與空間特徵價格模型等,並且以台中市不動產資料進行實證探究。這項新的研究技術在不動產評價領域中將可提供更好的解析能力,使其在評價過程中或是不動產投資決策時,成為一個更強而有力的分析工具。 / In recent years, spatial data analysis has received significant awareness and played an important role in social science because of the rapid development of Geographic Information System (GIS). Although classic statistical methods are attractive in traditional data analysis, they cannot be executed seriously for spatial data. Standard statistical techniques didn’t sufficiently deal with spatial dependence or spatial heterogeneity issues. Generally, the model-driven method and the data-driven method are mainly the two branches of the spatial data analysis. The purpose of this paper is to apply spatial statistics methods including geostatistical methods (kriging and cokiging), geographically weighted regression, and spatial hedonic price models to real estate analysis. It seems to be completely reasonable and sufficient. The real estate data in Taichung city (Taiwan) is used to carry out our exploration. These techniques give better insight in the field of real estate assessment. They can apply a good instrument in mass appraisal and decision concerning real estate investment.
59

Accelerating Global Product Innovation through Cross-cultural Collaboration : Organizational Mechanisms that Influence Knowledge-sharing within the MNC / L’innovation globale et la collaboration interculturelle : les mécanismes organisationnels qui déterminent le partage du savoir dans les entreprises multinationales

Jensen, Karina 04 June 2012 (has links)
La mondialisation, l’introduction d’un produit sur le marché, l’adaptation au consommateur représentent des défis permanents pour réussir l’innovation sur le marché à travers les cultures. Un environnement commercial interculturel et interconnecté a créé une demande croissante pour le partage des connaissances dans les entreprises multinationales (EMN). L’incapacité des membres d’une équipe dispersés géographiquement à partager et communiquer efficacement les idées et solutions peut entraîner un manque d’innovation des produits, un retard dans leur introduction, et réduire les ventes et opportunités de marchés. Cela nécessite de la part des dirigeants d’optimiser les connaissances interculturelles de l’équipe afin d’améliorer le design et la livraison de solutions innovantes pour les clients à l’échelle mondiale. Par conséquent cette thèse cherche à examiner et identifier les mécanismes organisationnels qui favorisent la collaboration interculturelle et le partage de connaissances au sein d’équipes dispersées géographiquement, dans l’élaboration d’un processus d’innovation (du front end of innovation). Cette thèse se base sur l’approche par les ressources et par les connaissances de la firme, où les pratiques cognitives et sociales intégrées jouent un rôle important pour l’innovation. A travers une recherche qualitative j’examinerai les mécanismes organisationnels qui influencent les interactions entre le responsable de projet et l’équipe interculturelle durant les lancements globaux de produit, de la conception du produit jusqu’à sa mise sur le marché. Dans la mesure où il y a peu de recherche empirique sur la collaboration interculturelle et l’innovation globale, c’est une opportunité considérable de contribuer à la recherche en management de l’innovation, et d’aider des organisations à développer leurs capacités de partage de connaissances, véritable avantage concurrentiel dans la conception et l’introduction de nouveaux produits sur les marchés internationaux. L’objectif de cette thèse et d’étudier et démontrer comment les EMN peuvent faciliter le processus de collaboration interculturelle afin de concevoir et de mettre en oeuvre efficacement des stratégies d’innovation pour de nouveaux produits. Cette recherche vise à développer un cadre et un modèle théorique pour la collaboration des équipes interculturelles en répondant à la question suivante : Comment les EMN optimisent la collaboration des équipes interculturelles afin d’améliorer le planning et la mise en oeuvre de stratégie globale d’innovation ? Ceci répond aux besoins des organisations de partager les connaissances du marché local entre les équipes interculturelles afin d’accélérer la réactivité aux opportunités du marché à l’international. / Globalization, time to market, and customer responsiveness present continuous challenges for achieving market innovation across cultures. A cross-cultural and networked business environment has created increased demand for knowledge-sharing within the multinational corporation (MNC). The inability of geographically distributed team members to effectively share and communicate ideas and solutions can result in a lack of product innovation, delayed product introductions, and reduced sales and market opportunities. This requires managers to leverage cross-cultural team knowledge in order to improve the design and delivery of innovative customer solutions worldwide. This dissertation thus intends to examine and identify organizational mechanisms that facilitate cross-cultural collaboration and knowledge-sharing for geographically distributed teams responsible for the front end of innovation.The resource-based and knowledge-based views of the firm inform this dissertation where integrated cognitive and social practices serve an important role for innovation. Through qualitative research, I will examine organizational mechanisms that influence interactions between the project leader and the geographically distributed team during global product launches, from product concept to market introduction. Since there is a lack of empirical research conducted with organizations on cross-cultural collaboration and global innovation, there is a significant opportunity to advance research within innovation management while assisting organizations in the development of knowledge-sharing capabilities that serve as competitive advantage in conceiving and introducing new products to international markets.The purpose of this dissertation research is to investigate and demonstrate how MNCs can facilitate the cross-cultural collaboration process in order to effectively conceive and execute innovation strategies for new products. The research intends to develop a framework and model for cross-cultural team collaboration in exploring and responding to the following research question: How can MNCs optimize cross-cultural team collaboration in order to strengthen the planning and execution of global innovation strategies? This research responds to organizational needs for sharing knowledge amongst cross-cultural teams in order to accelerate responsiveness to international market opportunities.
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臺北市公共自行車站點需求分析之研究 / A research in the demand of the public bike station in Taipei.

張辰尉 Unknown Date (has links)
近年來由於溫室效應加劇以及氣候變遷加劇,因此符合綠色運輸特性的公共自行車系統,成為各國交通部門發展綠運輸政策時的目標之一,同時,大數據分析亦是目前受到高度關注的熱門議題。而本研究首先使用臺北市微笑單車租借大數據探討在不同時間點下民眾日常使用微笑單車之旅運行為,分析不同站點間的旅次特性。再運用社群網絡分析,以站點之間旅次連結多寡作為權重,探討站點間之緊密程度,以及不同時間點下微笑單車租借量之熱點分布情形,並將其視覺化呈現。 後續透過文獻分析,擷取影響公共自行車使用量之因素後,本研究嘗試運用一般線性迴歸模型與地理加權迴歸進行模型建立,並探討各影響因素對於旅運需求之影響情形。實證結果顯示,地理加權迴歸模型可以解決一般線性迴歸所產生空間自相關問題,使得模型解釋能力獲得改善。本研究並使用地理加權迴歸進行使用需求分析以及預測,對未來公共自行車營運以及站點擴張提出結論以及建議,期能提升公共自行車系統之使用量。 / Due to the climate change and aggravation of the greenhouse effect in recent years, the public bicycle system with the feature of low-carbon emission has raised more and more attention internationally, and has become one of the targets in developing green transportation policies of transportation departments of governments around the world. Meanwhile Big Data analysis issues, on the other hand, are currently a sought-after topic which has caused great concern as well. In this study, we utilize the rental data of the YouBike system in Taipei to discuss the public usage of YouBike tour at different periods. With the use of social network analysis, we discuss the relationships between different bicycle stops based on applying the number of travels between different sites as the weight. Eventually, the hotspot analysis will be carried out by operating the GIS system. In this way, we are able to discuss the hotspot distribution of YouBike rentals in different time and then visualize the result. After that this study pick up the variables which will effect the YouBike usage by reference review. This research try to built models by utilizing the Least Squares Method and Geographically Weighted Regression. Then we will have a discussion with the result of the two models. The result shows that Geographically Weighted Regression can resolve the spatial autocorrelation problem which happened in the Least Squares Method and to gain a better result. With the analysis and prediction of public bicycle system from Geographically Weighted Regression, we hope to raise the usage of public bicycle system by concluding as well as making recommendations for the future operation of public bicycle and the expansion of bicycle stops.

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