Global ETD Search

11	主從式物件導向資料庫系統績效評估工作量模式之研究 / Client/Server OODBMS Benchmark Workload Modeling 方相宜, Fong, Shun-Ei Unknown Date (has links) 由於網路科技的進步 ,導致系統所需的資料不再只儲存於同一地點 , 面對分散式和主從式資料庫系統的使用日益頻繁 ,再加上現今的物件導向資料庫績效評估存在著許多的缺失包括 : 1.針對特定的應用領域 2. 針對特定的資料模型 3.測試資料庫綱目變得複雜 , 運算變得繁多 4.無法真實測出使用者應用領域的效能 .為了解決以上的問題 ,本研究擬使用物件導向系統分析方法作為使用者建構工作量模型的工具 , 發展出一個使用者需求導向的物件導向資料庫績效評估工作量模式。另一方面 , 為了驗證所提出理論的可行性 , 我們發展了工作量模型規格書產生器的雛型系統 , 使用者只須使用視覺化的圖形符號來編輯其工作量模型 , 系統即會產生工作量模型的規格描述 , 作為建構績效評估系統之進一步開發 .在網路科技與物件導向資料庫的應用範圍愈來愈廣 , 資料日益龐大與型態日益複雜的未來 , 以使用者需求為導向的績效評估將是未來物件導向資料庫的績效評估之發展方向。 / As the improving of network technology, the data of database is no more stored on the same site. So the distributed database system is more and more popular. Existing object-oriented database benchmarks have the following drawbacks:1.They are designed to the specific domains , so the workload models of theirs are unable to fully reprent user requirements . 2. They are designed to the specific data models , and their intentions are to measure the techniques and performance of database design . 3.As the database schemes are more complicated and test operations are more myriad , it will be harder and harder for users to implement the benchmark. 4.They can not really measure the performance on the specific domains of users. In order to resolve the above problems , this thesis tries to model user's requirements workload using system analysis method . Because our database benchmark schemes and operations are derived from the user's requirements , the workload will be more consistent , more representative and more accurate and the result will be useful and meaningful to user . In order to apply the model we propose , we develop the prototype of the workload specification generator . After users have finished editing their workload model with the visual graphic notations , the system will generate workload specifications which will be used in the later phase . As the application domain of OODBMS are diverse and databases are huge , the trend of benchmarks is toward user requirement orientation in the future . 物件導向資料庫績效評估物件導向系統分析方法 Object-Oriented Database Database Benchmark System Requirement Analysis
12	鳥籠高樓─由土地整合角度論臺北市住宅開發型態之變化 / Building High-rises on Small Plots: Housing Development Analysis From the View of Land Assembly in the Taipei City 吳佳儒, Wu, Chia Ru Unknown Date (has links) 在我國土地開發市場中，開發者應偏好整合坵塊、以大面積土地進行開發，惟相關報導指出臺北市近年以狹小基地開發之鳥籠建案有所增加，遂形成實際與預期不符的矛盾情況。本文從土地供給角度出發，認為除了地價昂貴之外，土地整合成本亦對開發基地規模有決定性的影響，且由於容積獎勵制度的施行，當開發者取得大小足以開發的土地後，可能不再進行土地整合、而改以資本替代之。為驗證上述推測，本研究以民國83至102年第三種住宅區新建住宅之使用執照存根為基礎，建立開發個案之資料庫；並利用集群分析方法，對開發個案之土地、資本配置型態進行歸納。經過統計，歷年均有近40%的新建住宅屬於基地狹小之鳥籠建案，且集群分析實證結果指出在空間上，市中心至郊區的住宅開發型態呈現單獨小規模開發至整合大規模開發的遞移變化，代表土地整合的難題已長期存在於臺北市住宅開發市場中，其中又以土地較零碎的市中心更為明顯。此外，本文另以基地面積、公告現值與政策虛擬變數對實際容積率進行線性迴歸，結果顯示整併土地確實有提升容積總樓地板面積的規模經濟效果，但效果卻不如政策性容積獎勵來得明顯；且經過模擬亦得知若欲達到同樣的樓地板面積增量，申請政策性獎勵所需的成本將遠低於進行土地整合。是以在取得合理規模之基地後，土地整合已非必要，再加上多樣化卻缺乏總量管制的容積獎勵，開發者將傾向透過政策性手段來達到擴大資本開發規模之目的，遂造成住宅開發型態呈現空間垂直的成長。 / In Taiwan, land developers are expected to prefer assembling small plots into a large lot for development. However, it is widely reported recently that development projects of building on a small plot have been increasing in Taipei. This phenomenon is inconsistent with the above expectation. From the perspective of land supply, this study argues that apart from land prices, costs of land assembly also have a decisive influence on the lot size for land developments. Also, because of the bulk reward regulations, developers might be less willing to conduct land assembly. Instead, they choose capital intensive means which presented as building high-rise housings once they obtain a site. To verify the argument, this study establishes a database of housing projects based on the residential usage licenses from 1994 to 2013, and observes allocation patterns of land and capital by using cluster analysis. Statistically, there are about 40% of housing projects that were built on plots smaller than 330 m2 every year. The empirical result of cluster analysis shows that housing development patterns change from downtown to suburbs. In downtown area, most developers build houses on a small single plot. However, they assemble plots to get a bigger site in the suburbs. It means that housing development market of Taipei has been entangled by land assembly problems for a long time. This issue explicitly exists in downtown area where lands are much more fragmented. In addition, this study uses site area, current land value and a policy dummy as independent variables and building density as dependent variable to conduct a linear regression. The result shows that, although land assembly increases the floor area, its effect is not as large as that of policy incentives. Based on this result, the comparison analysis of land assembly and policy incentives also points out that the application of bulk reward costs less than land assembly, while they can enjoy the same floor area. Therefore, it is believed that developers tend to choose increasing housing scale by applying bonuses instead of assembling lands. This trend makes the housing development forms vertically expand consequently. 土地開發土地整合住宅開發型態集群分析方法 land development land assembly housing development projects cluster analysis
13	Effets des incertitudes et de la variabilité spatiale des propriétés des sols et des structures sur le dimensionnement des semelles filantes et des conduites enterrées / Effects of uncertainties and spatial variation of soil and structure properties on geotechnical design : cases of continuous spread footings and buried pipes Imanzadeh, Saber 15 February 2013 (has links) Le sol présente une variabilité spatiale des propriétés physiques et mécaniques dont les effets sur des structures légères avec semelles filantes et sur les conduites enterrées ne sont pas bien pris en compte dans leur dimensionnement. Cette variabilité naturelle peut être très importante dans le cas de ces ouvrages car elle induit des tassements différentiels, dont les conséquences peuvent être dommageables : fissures dans les murs, les poutres ou encore des fuites dans les réseaux d’assainissement. La variabilité naturelle du sol et l'incertitude liée à la connaissance imparfaite des propriétés du sol et/ou du béton ou de l'acier de la structure sont les principales sources d'incertitude dans le choix des paramètres de calcul pour le dimensionnement de ces structures. Dans cette thèse, une approche analytique avec les méthodes probabilistes (FOSM et SOSM) et le modèle de Winkler, puis numérique avec le couplage de la méthode des éléments finis avec des approches géostatistiques ont été successivement menées pour modéliser le comportement des semelles filantes et des conduites enterrés lorsque les incertitudes sur les propriétés mécaniques du sol et de la structure sont prises en compte dans leur dimensionnement. Il apparait ainsi, l’importance du comportement longitudinal de ces ouvrages et du poids des incertitudes dans leur dimensionnement. / Soil exhibits spatial heterogeneities resulting from the history of its deposition and aggregation processes that occur in different physical and chemical environments. This inherent or natural variability can be very important in the case of the superficial geotechnical works inducing differential settlements, whose consequences on structural response can be harmful: local failures, cracking in beams or walls, leakage in sewers. Natural variability of soil and uncertainty related to imperfect knowledge in soil properties and/or of concrete or steel of the structure, are the major source of uncertainty in the choice of the design parameters. In this thesis the probabilistic methods in geotechnical engineering, the analytical Winkler model and the coupling of the finite element method with geostatistical approaches were successively used to model the behavior of shallow foundations and buried pipe networks when soil and structure uncertainties are considered in their design. Incertitude Variabilité spatiale Module de réaction du sol Semelle filante Conduite enterrée Interaction sol-structure Approches analytique et numérique Géostatistique Uncertainty Spatial variability Subgrade reaction modulus Spread footing Buried pipe Soil-structure interaction Analytical and numerical methods Geostatistic 关键词误差空间变化土质反应模块条形地基地下管道土地-结构的相互作用分析方法与数字方法地质统计 Incertidumbre Variabilidad espacial Módulo de reacción del suelo Cimientos continuos (zapatas) Tubería enterrada (canalización) Interacción suelo – estructura Modelos analíticos y numéricos Geoestadística Incertitudine Variabilitate spațială Modul de reacție Conducta îngropată Interactiune sol-structura Modele analitice și numerice Geostatistică Belirsizlik Mekansal değişkenlik Yer reaksiyonu modülü Şerit temeller Gömülü boru Zemin-yapı etkileşimi Analitik ve sayısal yaklaşımlar Jeoistatistik Неопределенность Закопанные трубы Геостатистика Incertezza Variabilità spaziale Modulo di reazione del calore del sole Soletta conduttiva Condotta interrata Interazione delle strutture del suolo Approccio analitico e numerico Geostatico مبدأ الريبة التغير المكاني الأساسات المنفصلة الانابيب المطمورة الاحصاءات الجغرافية عدم قطعیت تغييرپذيري فضايي مدول واکنش بستر سطحي فونداسيون لوله هاي مدفون اثر متقابل سازه و خاک روشهای عددي و تحليلي

Search results

主從式物件導向資料庫系統績效評估工作量模式之研究 / Client/Server OODBMS Benchmark Workload Modeling

鳥籠高樓─由土地整合角度論臺北市住宅開發型態之變化 / Building High-rises on Small Plots: Housing Development Analysis From the View of Land Assembly in the Taipei City