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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.
561

資料採礦預測系統之建構-以雲端運算為系統之主軸概念 / The construction of data mining forecasting system-conception based on cloud computing

廖婉婷 Unknown Date (has links)
隨著網際網路越來越發達,資料量的膨脹速度也超乎想像,因此資料採礦的技術已是不可或缺的,而雲端運算產業也將是未來的趨勢。本研究以雲端運算的概念,透過VBA(Visual basic for application)、軟體R以及Excel的增益集-RExcel,建構一個資料採礦分析之預測(Forecasting)系統的介面。考慮將本研究所建的系統大眾化,即便使用者未具備足夠的統計知識,也可以簡易的操作本系統。因此本研究建構使用簡單且方便的資料採礦之預測(Forecasting)系統。 本研究的資料採礦之預測系統裡面包含了五種資料採礦分析的預測方法,包括了迴歸分析(Regression analysis)、分類迴歸樹(C & R tree)、時間序列分析(Time series analysis)、類神經網路(Neural net)以及羅吉斯迴歸分析(Logistic regression analysis),其中本系統的羅吉斯迴歸分析又細分為兩種,有二元羅吉斯迴歸分析(Dichotomous logistic)和多元羅吉斯迴歸分析(Polytomous logistic)。本研究的資料採礦之預測系統操作簡易,使用者只需要選取所要預測的目標變數和欲加入建模的解釋變數即可分析,系統可以自行判斷目標變數所屬的類別對資料做後續分析。 關鍵字:資料採礦、雲端運算、預測 / As the Internet developed increasingly, the amount of data grow in unimaginable speed. Therefore, data mining techniques is essential, and cloud computing industry will be the future trend. This study which bases on the concept of cloud computing builds a data mining forecasting analysis system through VBA, the R language and add-ins of Excel –RExcel. The system which is builded in this study is convenient and easy. The user can operate the system easily, even if the user does not have sufficient statistical knowledge. Accordingly, this study constructs the simple and easy data mining analysis system of the forecasting. In this study, the data mining analysis system of the forecasting contains five methods of data mining analysis : regression analysis, classification and classification & regression tree, time series analysis, neural network and logistic regression analysis. And logistic regression analysis could be separated two parts, Dichotomous logistic and Polytomous logistic . In this study, the data mining forecasting system is easy to operate, and the user need only select the target variable and explanatory variables which they need. In addition, the system could determine which categories of target variable. Keyword:data mining、cloud computing、forecasting
562

以雲端運算為基礎的企業創新獲利經營模式 / The innovative and profitable business model of cloud computing-based company

王思涵 Unknown Date (has links)
21世紀是雲端運算的年代,隨著ICT軟硬體技術逐漸成熟,許多公司都加入了雲端運算的行列。然而,雲端運算真的能為企業帶來競爭優勢嗎?倘若所有企業均採用了雲端運算的技術或租用了雲端運算的服務,那麼這些企業還會有競爭優勢嗎?   隨著雲端運算的成熟和普及,最後雲端運算將會如同水電一般的隨手可得,失去其獨特和不可模仿性,也將會使企業失去競爭優勢。因此,企業不能單只是使用雲端運算而已,而是要利用雲端運算來形成其創新的經營模式,才能夠確保其獲利和競爭優勢。雖然目前許多業界和學術都投入了雲端運算的研究之中,但是對於一個好的、創新的、獲利的經營模式卻仍沒有一個定論。本研究試圖找出以雲端運算為基礎的企業其創新獲利的經營模式,將透過個案研究分析兩間公司,一個是搜尋網站中市佔率世界第一的Google,另一個是社交網站中擁有最多會員和最多分享次數的Facebook。   Google與Facebook兩者在經營模式上都是透過「平台的整合、深化與擴張」以及「平台上夥伴的引入」來達到其創新、獨特的經營模式,並成為該產業的領導廠商。本研究將深入討論兩者如何運用它們的核心能力來進行這些佈局,也希望藉由對這兩大企業的研究結果,使得我們對於雲端運算在創新經營模式的使用上有更深入的了解,進而給予新興企業或是已成長的企業一個經營模式上的建議。
563

端點銷售系統製造商因應雲端運算所帶來的衝擊之產品策略分析-以個案公司為例 / The product strategy of a POS provider to respond the coming impact of cloud computing in its industry-a case on a company

魏文彬, Wei, Charles Unknown Date (has links)
近年來資訊產業最熱門的話題,莫過於雲端運算了。不過一般的學術研究與相關報導均著墨於雲端運算的定義、可能的商業模式以及潛在的信任問題。坊間雖多有質疑雲端運算是否真正對台灣的硬體製造商,尤其是終端裝置製造商有所助益,但並沒有相關的研究發現來佐證。筆者從業於工業電腦與端點銷售系統近十年,對此影響有些許的想法,希望能夠以POS端點銷售系統製造商的角度,以某個案公司為例,來觀察雲端運算對此產業所造成的衝擊以及影響,並對於此產業之價值鏈的變化進行探討,進一步地提供個案公司因應此現象的建議產品策略。 本研究希望能夠探究,當雲端運算或雲端服務應用於端點銷售系統上,將會減低終端使用者對端點銷售系統硬體的規格要求,並且延長其硬體設備的使用年限或減緩換機的頻率,甚至採用其他更便宜的替代方案,如智慧型手機或平板電腦來取代原本的端點銷售系統。本研究建議個案公司應選擇整合更多端點銷售系統的周邊輸出入裝置,產出高度整合的多功能端點銷售系統,藉此提高端點銷售系統的產品價值;或以其他種的端點銷售系統設計方式,來提高端點銷售系統在終端使用者使用環境的彈性以及降低使用者的總體成本,才能使個案公司面對著雲端運算的衝擊,有機會可以改變其產品的定位,並避免毛利之持續下降。 / Cloud Computing is one of the most popular topic of Information Technology Industry in recent years. Most of the studies and researches are focus on the definition of Cloud Computing, the possible business opportunity and the potential moral hazard. There are many people questioning about the benefit which brought from Cloud Computing to most of hardware providers in Taiwan, still there is no academic research toward this issue. The researcher has some idea about this topic based on his working experience and would like to provide some suggestion of the product strategy to A Company. This research reveals while Cloud Computing or Cloud Service to be applied in POS industry, it would reduce the hardware specification requirement from the end user, or expand the product life of a POS system which is not beneficial to the POS manufacturer, even worse is the end user would take Smart Phone or Tablet PC as the alternative of POS system. This research suggests A Company should consider integrating more POS devices into the POS system that makes the POS system more multi-functional which could increase the product value and selling price. By using different kind of system design concept would increase the flexibility of the end user to operate the system and reduce the total cost of ownership. Thus A Company could adjust an appropriate product strategy to maintain its core competence.
564

A Cloud-Based Execution Environment for a Pandemic Simulator

Basile, Maurizio, Raciti, Massimiliano Gabriele January 2009 (has links)
<p>The aim of this thesis is to develop a flexible distributed platform designed toexecute a disease outbreaks simulator in a fast way over many types of platformsand operating systems. The architecture is realized using the Elastic ComputeCloud (EC2) supplied by Amazon and Condor as middleware among the varioustypes of OS. The second part of the report describes the realization of a webapplication that allows users to manage easily the various part of the architecture,to launch the simulations and to view some statistics of the relative results.</p>
565

In Search of an Efficient Marketing Strategy : for an Internet-based New Service in B2B Market

Cen, Chen, Johnsen, Ulf January 2010 (has links)
<p>Aim: In accordance with a company‟s business model, explore and analyse alternative marketing strategies for the market introduction of an Internet-based New Service in the B2B market. This study is interesting as it explores theories within different fields of research (new services, online-services and B2B market) and analyses them together to provide alternative marketing strategies.</p><p>Method: A qualitative research approach was conducted. By deskwork, secondary data was collected and analyzed. Formal half-structured interviews were carried out with the company from which we had received an assignment in order to enable a comparison between our theoretical findings and the knowledge the company already had.</p><p>Result & Conclusions: Based on the theoretical research and analysis, alternative marketing strategies are suggested. The contribution of this study to the mission company is presented.</p><p>Suggestions for future research: This study took a theoretical approach to the study of marketing strategies for an Internet-based new service in a B2B-market. Further research should concern a comprehensive quantitative research to capture currently employed strategies and analyse their consequences.</p><p>Contribution of the thesis: This study suggests alternative marketing strategies that can contribute to the re-evaluation of the preliminary business model of the mission company which envisage launching an Internet-based service in a B2B market.</p>
566

In Search of an Efficient Marketing Strategy : for an Internet-based New Service in B2B Market

Cen, Chen, Johnsen, Ulf January 2010 (has links)
Aim: In accordance with a company‟s business model, explore and analyse alternative marketing strategies for the market introduction of an Internet-based New Service in the B2B market. This study is interesting as it explores theories within different fields of research (new services, online-services and B2B market) and analyses them together to provide alternative marketing strategies. Method: A qualitative research approach was conducted. By deskwork, secondary data was collected and analyzed. Formal half-structured interviews were carried out with the company from which we had received an assignment in order to enable a comparison between our theoretical findings and the knowledge the company already had. Result &amp; Conclusions: Based on the theoretical research and analysis, alternative marketing strategies are suggested. The contribution of this study to the mission company is presented. Suggestions for future research: This study took a theoretical approach to the study of marketing strategies for an Internet-based new service in a B2B-market. Further research should concern a comprehensive quantitative research to capture currently employed strategies and analyse their consequences. Contribution of the thesis: This study suggests alternative marketing strategies that can contribute to the re-evaluation of the preliminary business model of the mission company which envisage launching an Internet-based service in a B2B market.
567

基於MapReduce之雲端運算下具地域特性之動態排程 / Dynamic locality driven scheduler for mapreduce based cloud computing

陳耀宗, Chen, Yao Chung Unknown Date (has links)
MapReduce 是目前最熱門的雲端技術之一,用來處理大量資料,不論資料探勘、非結構化的紀錄檔、網頁索引處理及其他需要大量資料處理的科學研究,都可透過 MapReduce 得到極佳的執行效率。MapReduce 為一分散式批次資料處理程式框架,將一個工作分解為許多較小的 map 任務以及 reduce 任務,由map 處理每個小問題,再由reduce將問題彙整,得到最終的結果。 Hadoop 是一個開放原始碼的 MapReduce 架構,並且被廣泛地應用在以大規模資料運算為主的雲端計算。Hadoop有一個非常重要的元件稱為scheduler ,是 hadoop的中樞,負責調度、指派任務和資源分配的優先順序。Scheduler的任務選擇與分配方式,將會影響 MapReduce 工作的執行效率與整個叢集的使用率,目前Hadoop預設的scheduler是將任務以先進先出(FIFO)的方式進行排程。提升MapReduce運算效能的挑戰之一為如何適當的分配Mapper 和 Reducer給雲端裡的每個節點來執行。儘管過去已經有許多改善MapReduce運算效能的研究,但是大部分的方法在實際的運作中,仍存在很多的問題,如工作節點的動態負載、data locality的問題,計算節點的異質性等等。我們發現目前Hadoop對於這些問題並沒有妥善處理,並且在相關的情況下,整體效能仍有改進空間。 我們提出Data Locality Driven Scheduler(DLDS)的方法,並實踐在 Hadoop上,試圖提高scheduler的效能。我們設計不同的實驗,比較DLDS在不同狀況下和其他的排程演算法的差異。實驗結果顯示,透過提高資料的地域性,平均可提昇10% 至 15% 的效能。 / MapReduce is programming model for processing large data set. It is typically used to do distributed computing on clusters of computers such as Cloud computing platform. Examples of bit data set include unstructured logs, web indexing, scientific data, surveillance data, etc. MapReduce is a distributed processing program framework, a computing job is broken down into many smaller Map tasks and a Reduce task.Each Map task processes a partition of the given data set and Reduce aggregates the results of Maps to produce final result. Hadoop is an open-source MapReduce architecture, and is widely used in many cloud-based services.To best utilize computing resource in a cloud server, a task scheduler is essential to assign tasks to appropriate processors as well as to prioritize resource allocation. The default scheduler of Hadoop is first-in-first-out (FIFO) scheduler which is simple but has a performance inefficiency yet to be improved. Although there have been many researches aiming to improve the performance of MapReduce platform in the past year, there still have many issues hindering the performance improvement, such as dynamic load balance, data locality, and heterogeneity of computing nodes. To improve data locality, we propose a new scheduler called Data Locality Driven Scheduler (DLDS) based on Hadoop platform. DLDS improve Hadoop's performamce by allocating Map tasks as close as possible to the data block they are to process. We evaluated the proposed DLDS against several other schedulers by simulation on an 8 nodes real Hadoop system. Experimental results show that DLDS can improve data locality by 10-15%, which results in a significant performamce improvement.
568

台灣伺服器代工產業價值鏈的破壞與重組 / Research on Destruction and Reconstruction of the Value Chain of Taiwan Server OEM/ODM Industry

陳儀錚, Chen, Yi Cheng Unknown Date (has links)
台灣伺服器代工產業位居全球第一的地位,長久以來都以服務歐美大廠的硬體品牌商為使命,已經身處在成熟期的產業發展階段。由於主機板規格日益標準化,加上目前台灣前五大ODM/OEM業者全部都主攻於代工製造中低階的x86架構伺服器,所以造成此市場區隔競爭激烈,毛利率逐年下降。 近年來「雲端運算」與「虛擬化技術」興起,替整個產業帶來破壞式創新的商機,不僅出現新的使用者族群(雲端資料中心)、產生較低階規格產品(雲端伺服器)的開發需求,不高度強調品牌忠誠度的雲端資料中心也讓整個產業的進入障礙得以降低。於是台灣伺服器代工產業價值鏈開始面臨破壞與重組。台灣伺服器代工業者與硬體品牌大廠、雲端資料中心業者或大型網路平台業者,以及其它中小型資料中心業者之間多重的動態競爭、合作或互補關係,來歸納出伺服器製造產業鏈逐漸形成的新網絡架構、代工廠商選擇轉型的策略意涵,並實際提出給伺服器代工業者的具體建議。 / Taiwan server OEM/ODM industry, in maturity stage of industry life cycle, has taken orders from European and American hardware brands for a long time and been ranked number one in the global market. Because the motherboard specifications are standardized increasingly and the top five ODM/OEM manufacturers all focus on the same mid to low-end x86-based servers, this market segment has faced fierce competition and low profit margin year by year. In recent years, cloud computing and virtualization technology bring destructive innovation and new business opportunities to the entire server OEM/ODM industry. This development not only created a new group of users (Cloud Data Center) and a new demand of lower-order need products (Cloud Server), but also reduced the entry barrier of unknown brands. As a result, Taiwan server OEM/ODM industry faced destruction and reconstruction of its value chain. By describing the mutual relationship between Taiwan server OEM/ODM vendors, i.e., European and American hardware brands, giant cloud data centers, and small to mid-sized cloud data centers, the research summarizes a new network architecture of the entire server industry. This research also provides strategic suggestions to potential owned-brand companies. At the end, the research proposed several specific recommendations to the Taiwan server OEM/ODM vendors.
569

Policy Merger System for P3P in a Cloud Aggregation Platform

Olurin, Olumuyiwa 09 January 2013 (has links)
The need for aggregating privacy policies is present in a variety of application areas today. In traditional client/server models, websites host services along with their policies in different private domains. However, in a cloud-computing platform where aggregators can merge multiple services, users often face complex decisions in terms of choosing the right services from service providers. In this computing paradigm, the ability to aggregate policies as well as services will be useful and more effective for users that are privacy conscious regarding their sensitive or personal information. This thesis studies the problems associated with the Platform for Privacy Preference (P3P) language, and the present issues with communicating and understanding the P3P language. Furthermore, it discusses some efficient strategies and algorithms for the matching and the merging processes, and then elaborates on some privacy policy conflicts that may occur after merging policies. Lastly, the thesis presents a tool for matching and merging P3P policies. If successful, the merge produces an aggregate policy that is consistent with the policies of all participating service providers.
570

Ordonnancement et déploiement d'applications de gestion de données à grande échelle sur des plates-formes de type Clouds

Muresan, Adrian 10 December 2012 (has links) (PDF)
L'usage des plateformes de Cloud Computing offrant une Infrastructure en tant que service (IaaS) a augmenté au sein de l'industrie. Les infrastructures IaaS fournissent des ressources virtuelles depuis un catalogue de types prédéfinis. Les avancées dans le domaine de la virtualisation rendent possible la création et la destruction de machines virtuelles au fur et à mesure, avec un faible surcout d'exploitation. En conséquence, le bénéfice offert par les plate-formes IaaS est la possibilité de dimensionner une architecture virtuelle au fur et à mesure de l'utilisation, et de payer uniquement les ressources utilisées. D'un point de vue scientifique, les plateformes IaaS soulèvent de nouvelles questions concernant l'efficacité des décisions prises en terme de passage à l'échelle, et également l'ordonnancement des applications sur les plateformes dynamiques. Les travaux de cette thèse explorent ce thème et proposent des solutions à ces deux problématiques. La première contribution décrite dans cette thèse concerne la gestion des ressources. Nous avons travaillé sur le redimensionnement automatique des applications clientes de Cloud afin de modéliser les variations d'utilisation de la plateforme. De nombreuses études ont montré des autosimilarités dans le trafic web des plateformes, ce qui implique l'existence de motifs répétitifs pouvant être périodiques ou non. Nous avons développé une stratégie automatique de dimensionnement, capable de prédire le temps d'utilisation de la plateforme en identifiant les motifs répétitifs non périodiques. Dans un second temps, nous avons proposé d'étendre les fonctionnalités d'un intergiciel de grilles, en implémentant une utilisation des ressources à la demandes.Nous avons développé une extension pour l'intergiciel DIET (Distributed Interactive Engineering Toolkit), qui utilise un marché virtuel pour gérer l'allocation des ressources. Chaque utilisateur se voit attribué un montant de monnaie virtuelle qu'il utilisera pour exécuter ses tâches. Le mécanisme d'aide assure un partage équitable des ressources de la plateforme entre les différents utilisateurs. La troisième et dernière contribution vise la gestion d'applications pour les plateformes IaaS. Nous avons étudié et développé une stratégie d'allocation des ressources pour les applications de type workflow avec des contraintes budgétaires. L'abstraction des applications de type workflow est très fréquente au sein des applications scientifiques, dans des domaines variés allant de la géologie à la bioinformatique. Dans ces travaux, nous avons considéré un modèle général d'applications de type workflow qui contient des tâches parallèles et permet des transitions non déterministes. Nous avons élaboré deux stratégies d'allocations à contraintes budgétaires pour ce type d'applications. Le problème est une optimisation à deux critères dans la mesure où nous optimisons le budget et le temps total du flux d'opérations. Ces travaux ont été validés de façon expérimentale par leurs implémentations au sein de la plateforme de Cloud libre Nimbus et de moteur de workflow MADAG présent au sein de DIET. Les tests ont été effectuées sur une simulation de cosmologie appelée RAMSES. RAMSES est une application parallèle qui, dans le cadre de ces travaux, a été portée sur des plateformes virtuelles dynamiques. L'ensemble des résultats théoriques et pratiques ont débouché sur des résultats encourageants et des améliorations.

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