疏水性复合电极的催化特性和在有机电合成中的应用

综述了有关疏水性复合电极的制备、催化特性、在有机电合成中的应用和催化机理等研究进展 ,参考文献共 15篇。     

高校多媒体教室计算机系统的科学架构

针对美国东部时间2014年4月8日午夜零点已全面停止Windows XP视窗操作系统安全更新,不再修补XP系统的安全漏洞,安装XP系统的用户面临极大的风险。由于国内各高等学校多媒体教室计算机操作系统大多使用的是Windows XP,面对XP的停服,不再保护教室计算机系统的安全,各种漏洞将不断出现,面临病毒入侵的风险,如不尽快采取措施,升级多媒体教室计算机操作系统,将会影响多媒体教学工作。为做好多媒体教室计算机操作系统的升级工作,使教师尽快掌握Windows 7操作系统的使用技巧,更好地服务于高校多媒体教学,故必须对高校多媒体教室计算机系统重新进行科学架构。     

Using imbalance metrics to optimize task clustering in scientific workflow executions

Scientific workflows can be composed of many fine computational granularity tasks. The runtime of these tasks may be shorter than the duration of system overheads, for example, when using multiple resources of a cloud infrastructure. Task clustering is a runtime optimization technique that merges multiple short running tasks into a single job such that the scheduling overhead is reduced and the overall runtime performance is improved. However, existing task clustering strategies only provide a coarse-grained approach that relies on an over-simplified workflow model. In this work, we examine the reasons that cause Runtime Imbalance and Dependency Imbalance in task clustering. Then, we propose quantitative metrics to evaluate the severity of the two imbalance problems. Furthermore, we propose a series of task balancing methods (horizontal and vertical) to address the load balance problem when performing task clustering for five widely used scientific workflows. Finally, we analyze the relationship between these metric values and the performance of proposed task balancing methods. A trace-based simulation shows that our methods can significantly decrease the runtime of workflow applications when compared to a baseline execution. We also compare the performance of our methods with two algorithms described in the literature.     

Heuristics for the time dependent team orienteering problem: Application to tourist route planning

The Time Dependent Team Orienteering Problem with Time Windows (TDTOPTW) can be used to model several real life problems. Among them, the route planning problem for tourists interested in visiting multiple points of interest (POIs) using public transportation. The main objective of this problem is to select POIs that match tourist preferences, taking into account a multitude of parameters and constraints while respecting the time available for sightseeing in a daily basis and integrating public transportation to travel between POIs (Tourist Trip Design Problem, TTDP). TDTOPTW is NP-hard while almost the whole body of the related literature addresses the non-time dependent version of the problem. The only TDTOPTW heuristic proposed so far is based on the assumption of periodic transit service schedules. Herein, we propose efficient cluster-based heuristics for the TDTOPTW which yield high quality solutions, take into account time dependency in calculating travel times between POIs and make no assumption on periodic service schedules. The validation scenario for our prototyped algorithms involved the transit network and real POI datasets compiled from the metropolitan area of Athens (Greece). Our TTDP algorithms handle arbitrary (i.e. determined at query time) rather than fixed start/end locations for derived tourist itineraries.     

Widows 7环境下电子取证特点分析

随着微软新一代操作系统Windows7的普及,计算机取证调查人员将在实际工作中越来越多的遇到Windows7操作系统,本文介绍了Windows7环境下调查人员需要了解的取证特点以及对取证的影响进行简要的介绍和分析。     

嵌入式中小船舶导航系统船载单元的设计与实现

为解决中小船舶定位导航难的问题,从中小船舶定位导航和监控的实际需要出发,使用基于WindowsCE.NET的嵌入式技术,设计并实现基于嵌入式系统的中小船舶导航系统船栽单元.使用Platform Builder定制开发应用程序,内置自主开发的电子地图,设计船栽单元与监控中心间的通信协议,利用电台进行数据通信,采用多线程技术实现GPS定位数据采集与处理,电子地图定位显示以及数据通信的功能.经实验测试,该船载单元能很好地实现各项功能.该船载单元功能强、体积小、抗震强度高、功耗小、成本低,可以较好地满足当前中小船舶可视化定位导航的需求.     

Abstract,link, publish,exploit: An end to end framework for workflow sharing

Scientific workflows are increasingly used to manage and share scientific computations and methods to analyze data. A variety of systems have been developed that store the workflows executed and make them part of public repositories However, workflows are published in the idiosyncratic format of the workflow system used for the creation and execution of the workflows. Browsing, linking and using the stored workflows and their results often becomes a challenge for scientists who may only be familiar with one system. In this paper we present an approach for addressing this issue by publishing and exploiting workflows as data on the Web with a representation that is independent from the workflow system used to create them. In order to achieve our goal, we follow the Linked Data Principles to publish workflow inputs, intermediate results, outputs and codes; and we reuse and extend well established standards like W3C PROV. We illustrate our approach by publishing workflows and consuming them with different tools designed to address common scenarios for workflow exploitation.     

基于SOA的中小制造企业应用集成系统研究

制造企业内部及企业之间应用的集成问题已成为当前制造业信息化的关键。面向中小制造企业信息化，提出并设计实现了基于面向服务体系架构（Service-Oriented Architectures, SOA）的中小制造企业应用集成系统。在该系统中，制造企业内与企业间的应用通过集成系统所提供的各种服务可跨越防火墙而集成在一起，并可通过该系统中企业应用集成（Enterprise Application Integration, EAI）平台以及工作流系统的协调来互相调用，以实现一个完整的业务目标。     

基于Windows Server 2008的Internet/Intranet网站服务器组建与设计

近年来．企业局域网大部分由Netware、Unix、Windows NT三大网络操作系统把持着,而基于Windows Server 2008的Internet／Intranet在国内发展如火如荼。目前32位版本的服务器操作系统Windows Server 2008凭借其可移植性好,安全性达到美国政府的C2级等优势一直是创建网站服务器的理想选择,基于Windows Server 2008的网站服务器组建与设计,将为电子商务及商业应用程序连线搭建更大更好的平台。     

农业科技110移动助理软件研究与实现

为提高农业科技110的服务质量和服务效率,拟在微软Windows Mobile平台上开发农业科技110移动助理软件,该文介绍了软件的系统研究与实现。