专题:中国非正规经济(下)

李明欢以非正规雇佣为主要内涵的非正规经济之所以能够在跨国领域大行其道,根源之一在于全球化正如同由跨国资本把握方向盘的巨型“压路机“,力图突破一切不利于其扩张之国境边界,朝着政治和

面向Hadoop平台的数据密集型工作流系统的设计与实现

&nbsp;传统的工作流系统无法满足企业构建数据密集型应用的需求，需要借助于Hadoop平台处理大数据的能力。现有的Hadoop工作流系统采用自定义的描述语言构建Hadoop工作流，无法与企业已有的工作流系统通信，导致企业难以使用已有系统服务与Hadoop平台共同构建处理数据密集型应用的工作流。使用BPEL语言来构建Hadoop工作流既可以借助于传统工作流语言BPEL丰富表现能力、可以作为单个Web服务集成、支持长时间有状态的交互等优点，又可以使用Hadoop平台处理数据密集型应用的能力，是一个解决现有问题的有效手段.&nbsp; &nbsp; 本文首先分析了使用Hadoop工作流处理数据密集型应用的意义和当前Hadoop工作流系统存在的一些不足，包括：无法与企业已有的工作流系统交互、表达能力弱、缺乏工作流层次的调度和监控等，然后提出了能够有效解决这些问题的面向Hadoop平台的数据密集型工作流系统。在此基础上，围绕着基于规则的模型转换方法、基于Hadoop工作流的公平调度方法和工作流运行时监控技术三个方面展开研究。在基于规则的模型转换方法方面，论文对Hadoop工作流模型和BPEL模型进行了定义，确定了模型转换规则，设计基于规则的模型转换框架，高效的完成了从Hadoop工作流模型到BPEL模型的转换。在基于Hadoop工作流的公平调度方法方面，论文提出了一种基于Hadoop工作流的公平调度方法FlowS。FlowS采用工作流池来组织工作流和分配资源，保证了工作流的隔离性。同时，该方法采用了工作流池动态构建算法，将资源公平的分配到各个工作流中去。在工作流运行时监控技术方面，论文采用持久化工作流模型和异步更新的方法，来降低视图展示的开销。同时，论文提出对每个活动的工作流建立监控实例来处理监控请求和失效发现，以此保证工作流正确执行，进一步降低监视开销。&nbsp;&nbsp; &nbsp; 最后，论文应用以上研究成果，设计和实现了面向Hadoop平台的数据密集型工作流系统。&nbsp;Enterprises have to build data-intensive applications on Hadoop platform for the limited data-process capability of traditional workflow system.Hadoop workflow systems build Hadoop workflows by user-defined language which makes it difficult to communicate and integrate with existing workflow systems. Building Hadoop workflows by BPEL not only can utilize the advantage of traditional description language BPEL, but also can utilize Hadoop platform&rsquo;s capacity of processing data-intensive applications, so it&rsquo;s an effective method to solve existing problems. This thesis analyzes the benefit of dealing with data-intensive applications using Hadoop workflows and some drawbacks of Hadoop workflow system which include inability of interacting with enterprise workflow systems, weak ability of description, lack of workflow-level scheduling and monitoring and so on. In order to solve those problems, this thesis proposes a Hadoop oriented data-intensive workflow system. This thesis focuses on rule-based model transformation, fair scheduling method and run-time monitoring for Hadoop workflow. In rule-based model transformation, this thesis designs mapping rules and the efficient framework of model transformation. In the fair scheduling method for Hadoop workflow, this thesis proposes fair scheduling method-FlowS. This method can not only provide the isolation of Hadoop workflow through workflow pools, but also assure the fairness of resource allocation through dynamic construction algorithm. In run-time monitoring, this thesis persistent Hadoop workflow model and updates view asynchronously to reduce the workload of presentation layer. In the meantime，a approach of creating a monitor instance for every active Hadoop workflow, thread pool is proposed, which identify failures and reduce the overhead of monitoring. In the end, the thesis discusses the design and implementation of Hadoop oriented data-intensive system. The research results above are applied.</p

hadoop oriented data-intensive workflow modeling and enactment

大数据处理和分析技术能够指导企业进行快速、正确的决策,将在企业业务流程中发挥重要的作用。为了支持企业开发数据密集型应用,并将其集成到已有的业务流程中,需要基于Hadoop平台的数据密集型工作流系统,其中的核心技术之一是面向Ha doop的工作流建模。该文基于BPEL语言定义了Hadoop工作流建模语言,使得该工作流建模语言支持丰富的流程控制语义,并通过模型转化为BPEL流程,可以运行于成熟的BPEL引擎中,实现可靠高效的工作流调度。该文还详述了Hadoop工作流到BPEL在语义模型、部署模型、执行模型等三个层次的转换。最后,通过一个日志分析工作流案例展示了方法的可用性

flows:a fair scheduling method for mapreduce dataflow

MapReduce Job的调度机制一直是学术研究的热点。在分析MapReduce数据流调度模型的基础上,提出一种面向MapReduce数据流的公平调度方法FlowS。该方法采用数据流池来分配资源以保证MapReduce数据流的隔离性,并且采用数据流池动态构建算法来确保资源的公平分配。实验表明,该调度方法可以有效提高Hadoop集群对MapReduce数据流的处理效率。国家自然科学基金项目(61170074)|国家科技重大核高基项目(2010ZX01042-001-001-05)|国家科技支撑计划(2011BAH15B05,2012BAH05F02)资助MapReduce Job scheduling has been paid great attention in academic research.Based on the analysis of MapReduce dataflow scheduling model,this paper presented a fair scheduling method for MapReduce dataflow-FlowS.This method can not only provide the isolation of MapReduce dataflow through dataflow pools,but also assure the fairness of resource allocation through dynamic construction algorithm.The results of experiences show that the proposed method can improve the processing efficiency of Hadoop Clusters

VIBRATIONAL CHARACTERISTICS OF SOIL SEDIMENTS IN THE SHANGHAI PLAIN INFERRED FROM MICROSEISMS-ON RELATIONSHIP BETWEEN PEAK FREQUENCIES OF SPECTRAL RATIO, H/V, AND DEPTH TO BEDROCK-

Under the context of IDNDR, a project entitled "Seismic Risk Assessment of Urban Facilities in A Sedimentary Region Affected by River Route Changes" was conducted by DPRI, Kyoto University and State Laboratory for Disaster Reduction in Civil Engineering, Tongji University, China. The subjects include microzonation of the Shanghai region based on microseism observations. Brief reports were given for microseism observations, geological setting of the Shanghai plain, basic characteristics of microseisms at various soil sites and a reference rock site. To evaluate ground vibrational characteristics, spectral ratios of horizontal components to vertical ones, H/V, were examined. All the H/Vs had sharp peaks, which varied with site location. A linear relation between peak periods of H/V and the depth to bedrock was obtained. Applicability of H/V to microzoning of sedimentary regions was discussed.Under the context of IDNDR, a project entitled "Seismic Risk Assessment of Urban Facilities in A Sedimentary Region Affected by River Route Changes" was conducted by DPRI, Kyoto University and State Laboratory for Disaster Reduction in Civil Engineering, Tongji University, China. The subjects include microzonation of the Shanghai region based on microseism observations. Brief reports were given for microseism observations, geological setting of the Shanghai plain, basic characteristics of microseisms at various soil sites and a reference rock site. To evaluate ground vibrational characteristics, spectral ratios of horizontal components to vertical ones, H/V, were examined. All the H/Vs had sharp peaks, which varied with site location. A linear relation between peak periods of H/V and the depth to bedrock was obtained. Applicability of H/V to microzoning of sedimentary regions was discussed

Assessment Report of Doctoral Theses

高速鉄道トンネル内の波動に関する研究[眞下]太陽熱を利用した吸収式減湿乾燥および空調システムに関する研究[平]高い電子輸送機能を有する有機薄膜材料の設計に関する研究[徳久]微細構造を制御したTio_2複合半導体の合成と光触媒への応用[藤井]共有結合性物質の高温変形機構の関する研究[川原]ストキャスティックな磁場に起因するプラズマの輸送[久保田]Development of New-Type Electrochemical Gas Sensors Using Stabilized Zirconia Electolyte and Oxide Electrodes[盧]混合伝導体ーイオン伝導体を用いたデバイスと界面における伝導機構の解析[光安]構造材料の再結晶に及ぼす粒界の効果に関する研究[上原]バナジウムおよびニオブ中に溶解した水素同位体の電位勾配下における拡散および不純物効果に関する研究[藤井]トリチウムミクロオートラジオグラフィーによるジルコニウム合金の水素吸収機構の研究[磯部]クラスター内光励起プロトン移動のダイナミックス[濱邊]配座柔軟性を持つ新規ビスフェノール配位子の合成研究[小林]Design of NiMo Catalyst Supported on Carbon Black with Recovery Function for Highly Efficient Coal Liquefaction Process[蓮尾]Hydrogen-Transferring Liquefaction Of Subbituminous Coals To Achieve Complete Conversion[岸野]置換トロポノイドと9,10-ジシアノアントラセンの光反応及びアズレンキノン類の光2量化反応に関する研究[川上]Synthesis and Biological Activities of 9-Deoxycotylenol Derivatives[李]負イオンプラズマ中におけるイオン波の伝播特性に関する研究[吉村]黒鉛における重水素の挙動の反跳粒子検出法による研究[大窪]磁気中性線放電における粒子挙動とプラズマ生成条件に関する研究[迫田]高周波誘導結合型プラズマ中の電子挙動のレーザー散乱法による研究[堀]電子サイクロトロン共鳴プラズマスパッタを用いたシリコン酸化膜と酸窒化膜の低温形成に関する研究[高]レーザー計測法とコンピュータシミュレーションを用いた電子サイクロトロン共鳴プラズマの挙動に関する研究[Cronrath]超音速ノズルからの適正膨張噴流に関する研究[樫谷]希薄気体中粒子に働く遊泳動の解析とその応用[結城]沸騰水型原子炉における核・熱結合不安定性に関する基礎的研究[上廣]パルスジェット点火による希薄混合気の燃焼に関する研究[尹]多点・時間差点火方式によるエンジン内燃焼制御に関する研究[宣]二成分非共沸混合冷媒の水平管内凝縮に関する研究[石橋]流下液膜式プレートフィン蒸発器内での純冷媒HCFC123および混合冷媒HCFC134a/HCFC123の伝熱特性に関する研究[大原]竪型円筒容器内の気液二相流解析[桑木]Transient characteristics of combustion of premixed gas inside a refractory tube[Kansuntisukmongkol]回転水中紡糸法による金属細線の製造プロセスに関する研究[曺]現場および衛星観測データによる黒潮の流量変動に関する研究[内田]東アジアにおける大気汚染物質の挙動に関する数値解析的研究[姜]大型EB炉による高清浄度材料及び高融点金属材料の溶製に関する研究[清水]The Carbonization and Structural Analysis of Fullerene Related Materials[江頭]Design and Fabrication of Micro Gas Sensors with a Metal Oxide Sensing Layer[鄭]自動車排ガス浄化用三元触媒の高機能化に関する研究[山田]Preparation and Application of some High Performance Carbon Materials[凌