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退貨産品在國民經濟中發揮重要作用,近些年來在工業界和學術界引起廣泛關注。由于受到退貨産品的巨大經濟潛能驅動以及迫于相關法律的強大壓力,企業開始積極整合現有供應鏈流程和産品退貨流程,但是在這個過程中生産計劃和庫存管理運營遇到了前所未有的挑戰。本論文分析了可修護單壹産品的多周期庫存系統管理問題,其中該庫存系統包含隨機的新産品需求和産品保修需求。所探討的系統還包含了以下特征: i. 産品供應源的完美替換。新訂購産品和維修後的退貨産品並無二異。ii. 需求優先級。在單個周期內,新産品需求優先級高于保修需求。iii. 新産品訂購和退貨産品維修特性。兩項流程交付時間都假設爲零。在每個周期中,維修退貨産品過程涉及且考慮維修損失。我們探尋到了所考察系統的最優庫存補貨和處理控制策略。 ; Product returns play an important role in the economy and have attracted more and more attention both from industry and academia in the past few years. Motivated by enormous economic potential of and dramatic legislation pressure on product returns, companies today actively integrate product-return processes with their existing forward supply-chain processes, but must confront the considerable challenge of production planning and inventory control problems compared to traditional problems without returns and repairs. ; This thesis analyzes a multi-period single-item repairable inventory system with stochastic new and warranty demands. The system investigated has the following features: i. perfect substitution of supply sources. Newly-procured items are indistinguishable from items repaired from repairable warranty returns. ii. demand priority. New demand has higher priority than warranty demand within a period and thus needs to be satisfied first. iii. properties on the processes of purchasing and repairing. We assume zero lead-time for both processes. Further we capture the "repair loss" in repairing returns in each period. We identify the optimal inventory replenishment and disposal policies for the investigated system. ; Detailed summary in vernacular field only. ; Lin, Yizhong. ; Thesis (Ph.D.) Chinese University of Hong Kong, 2014. ; Includes bibliographical references (leaves 80-87). ; Abstracts also in Chinese.

這項研究探討信息科技在中國的技術政治。研究試圖書寫電子計算機作為一種新的電子信息科技在中國早期設置過程的技術政治社會史,並在理論層面上尝试构建一個拓展了的「技術、社會、與勞動」的進路。源於冷戰的地緣政治結構,不像韓國、台灣、或香港等其他亞洲國家和地區 ,在1980年代改革開放以前,中國大陸的計算機工業已經經歷了近30年(1955-1984)連續且激進的獨立發展。特別需要指出的是,中國社會主義時代的計算機發展不僅僅是爲了滿足冷戰中的國防需要和技術民族主義意識形態下社會動員的需要,同時高度嵌入了有關階級政治和技術哲學的社會主義「社會實驗」當中。而隨著文革群眾運動的終結和中國的「改革開放」,鄧小平為首的國家決策層爲了回應來自外部的壓力和來自社會主義內部的危機,用實用主義的技術發展觀取代了社會主義的技術民主實踐。1984年,隨著阿尔文.托夫勒(Alvin Toffler)的《第三次浪潮》(The Third Wave)風靡中國大陸,革命中國的計算機工業和技術政策逐步被隨新自由主義全球化而來的「信息社會」和「矽谷模式」所取代。 ; 作為一個技術和文化的雙重物件,電子計算機及其衍生科技(臺式計算機、筆記本電腦、智慧手機、平板電腦等)是理解當代資本主義生產、消費、與勞動關係的指標性科技。然而在社會主義中國的革命現代化進程中,它卻曾經一度拐入了一條另類的發展路徑。中國的信息化(informationalization)或曰計算機化(computerization)過程中的技術路線鬥爭和轉型是如何發生的,這一進程與中國「從毛到鄧」的獨特現代化道路之間是怎樣的關係?時至今日,批判的傳播研究對這段歷史依然所知甚少。本文試圖重訪這個歷史轉折,探查計算機在中國的早期技術政治史。通過追蹤關鍵的歷史事件、人物、思潮、和政策,論文試圖探尋冷戰架構下東西方技術政治之間的交鋒,如何在被計算機仲介的生產與勞動關係中顯影。從這個「閃回」中得到的知識,有助我們將對今日中國信息產業和信息勞動的理解,重新納入中國革命現代性的潮起潮落之中。 ; This paper traces the political and social history for the installation process of digital technology in China, in order to shed light on the ways in which computer interacted with the transformation of Chinese socialism. Due to geopolitical structure of the Cold War, unlike other East Asian countries, before 1980s China had developed its independent computer industry for more than 30 years. This development was not just under the rubric of techno-nationalism, which mainly helps to fulfill military and national defense aims, but also embedded into proletariat political debates. Maoist China developed a dialectical approach to technology, in which the most powerful productive power is the revolutionary proletariat class per se, not the machine or technology. So the process of socialist technology development, like the process of socialist culture and arts development is also a dialectical process, which must follow mass line to not just develop productive force, but also transform production relations and create socialist subjectivity. Instead, the post-Mao leadership under Deng Xiaoping responded to external Cold War pressures and the profound internal crises of ...

当今,越来越多的用倾向于使用论坛、博客、脸书等在线工具来表达关于商品、电影和政治等话题的观点。这些观点不仅可以帮助用进行决策,同时也为各个商业和社会领域提供了具有重要价值的反馈信息。因此,面向观点应用成为了当前最活跃的研究领域之一,其中包括观点检索,观点摘要,观点问答。面向观点应用与面向事实应用的根本区别是信息需求的不同,分别是传统的客观信息和主观信息。所谓主观信息是指对于某个特定目标的观点或评论。为了表示主观信息,应该综合考虑观点性、主题相关性,以及观点与主题之间的关联。现有的基于词袋的表示方法将词作为描述客观信息的基本语义单元,它可以有效的表示主题相关性以满足客观信息的需求。而主观信息需要同时考虑观点性和主题相关性,由于单独一个词不能同时表示观点性和相关性,因此词不再是最小的语义单位。此外,基于词袋的表示方法忽略了词序和词义,这使得观点性和相关性两类信息通常混在一起,难以区分。因此,基于词袋方法不能够准确的表示主观信息,并严重的影响了面向观点应用的性能。 ; 本文回答了以下几个由主观信息表示不当所引发的研究问题: 1. 对于主观信息而言单个词将不再是基本语义单元,是否存在一种有效的表示方法对其进行描述? 2. 由于主观信息是观点信息和相关性信息的结合,如何利用新的表示方法来描述这二者之间的关联信息?3. 如何对主观信息进行量化,以便对文档进行检索和分析? 4. 如何在面向观点应用中实现全新的主观信息表示方法? ; 由于观点检索的结果会直接影响到其它面向观点应用的性能,因此本文从观点检索这一问题入手。首先,我们提出了一种基于句子的方法来分析词袋表示方法的局限性。以此为据,定义了一种具有丰富语义的表达方式来表示主观信息,即词对,它是由出现在同一句子中的情感词和与之关联的目标词共同组成的。然后,我们提出了一系列方法来描述和获取两类语境信息:1)观点内信息:我们给出了三种提取词对的方法以获取观点与主题的关联信息;2)观点间信息:我们提出了一种权重计算方法来度量词对间的相关程度,从而获取词对与词对之间的关系。最后,我们集成了观点内信息和观点间信息并提出了潜在情感关联模型来解决观点检索这一问题。在标准数据集上的实验结果表明,基于词对的表示方法可以有效地描述主观信息,同时潜在情感关联模型能够获取词与词之间的关联信息,从而实现了利用语境信息提高观点检索的效果。 ; 此外,我们将词对应用于观点摘要和观点问答中,标准数据集上的评测结果显示基于词对的主观信息表示方法对于其它面向观点应用也同样有效。 ; There is a growing interest for users to express their opinions about products, films, politics, by using on-line tools such as forums, blogs, facebooks, etc. These opinions cannot only help users make decisions, e.g., whether to buy a product, but also to ob-tain valuable feedback for business and social events. Today, research on opin-ion-oriented applications (OOAs) including opinion retrieval, opinion summarization and opinion question and answering is attracting much attention. The difference be-tween fact-based and opinion-oriented applications lies in users' information need. The former requires objective information and the latter subjective, which comprises of opinions or comments expressed on a specific target. To meet the need of subjective information, both opinionatedness and relevance together with the association between them should be taken into account. Existing systems represent documents in bag-of-word. However, this representation fails to distinguish ...

by Chau Ho Wai. ; Thesis (M.Phil.)--Chinese University of Hong Kong, 1998. ; Includes bibliographical references (leaves 134-140). ; Abstract also in Chinese. ; ACKNOWLEDGMENTS --- p.iv ; LIST OF TABLES --- p.v ; ABBREVIATIONS --- p.vi ; CHAPTER ; Chapter ONE --- INTRODUCTION --- p.1 ; Chapter 1.1 --- The Question: How the civil-military relations evolved during the post-Deng era? ; Chapter 1.2 --- The Case of the 1996 Taiwan Straits Crisis ; Chapter 1.3 --- Framework: Allison's Model of Decision-Making ; Chapter 1.4 --- Data and Organization ; Chapter TWO --- LITERATURE REVIEW --- p.11 ; Chapter 2.1 --- Non-Communist Regimes ; Chapter 2.2 --- Communist Regimes ; Chapter 2.3 --- Post-Communist World ; Chapter 2.4 --- Military Politics in China ; Chapter THREE --- INSTITUTIONAL DEVELOPMENT OF PLA: FROM DENG TO POST-DENG ERA --- p.34 ; Chapter 3.1 --- PLA in the Deng Era ; Chapter 3.2 --- PLA in the Post-Deng Era ; Chapter 3.3 --- "Professionalization, Differentiation and Institutionalization" ; Chapter FOUR --- ORGANIZATIONAL INTERESTS OF PLA IN THE TAIWAN STRAITS CRISIS --- p.64 ; Chapter 4.1 --- The War Games and the Policy Handle ; Chapter 4.2 --- Employing the Organizational Process Model ; Chapter 4.3 --- Organizational Interests and Demands of the PLA ; Chapter 4.4 --- Information Processing of the PLA ; Chapter 4.5 --- Resource Acquisitions of the PLA ; Chapter FIVE --- BRINGING THE PLA INTERESTS INTO GOVERNMENTAL POLITICS --- p.100 ; Chapter 5.1 --- Employing the Governmental Politics Model ; Chapter 5.2 --- Perspectives of Jiang Zemin and PLA on the Taiwan Question ; Chapter 5.3 --- Political Pulls and Hauls in the Taiwan Straits Crisis ; Chapter 5.4 --- Legitimacy and Leadership Succession ; Chapter SIX --- CONCLUSION --- p.126 ; Chapter 6.1 --- Summary of Findings ; Chapter 6.2 --- Prospects of Future Research ; BIBLIOGRAPHY --- p.134