Genetic algorithm for scheduling reentrant jobs on parallel machines with a remote server

This paper considers a reentrant scheduling problem on parallel primary machines with a remote server machine, which is required to carry out the setup operation. In this problem, each job has three operations. The first and last operations are performed by the same primary machine, implying the reentrance, and the second operation is processed on the single server machine. The order of jobs is predetermined in our context. The challenge is to assign jobs to the primary machines to minimize the makespan. We develop a genetic algorithm（GA） to solve this problem. Based on a simple strategy of assigning jobs in batches on the parallel primary machines, the standardized random key vector representation is employed to split the jobs into batches. Comparisons among the proposed algorithm, the branch and bound（BB） algorithm and the heuristic algorithm, coordinated scheduling（CS）, which is only one heuristic algorithm to solve this problem in the literature, are made on the benchmark data. The computational experiments show that the proposed genetic algorithm outperforms the heuristic CS and the maximum relative improvement rate in the makespan is 1.66%.     

Android中UI线程与后台线程交互的探讨

在使用Android智能机的时候,往往有很多比较耗时的操作,如果这些耗时的操作放在主UI线程中,当耗时时间超过5秒后,系统就会报错,影响用户的使用,为了解决这个问题,我们必须使用异步更新UI界面.在Android系统中实现UI线程与后台线程的数据交互.     

一种基于Linux智能排队系统的设计与实现

目前,随着我国电子化信息化的日益推广,排队系统已被广泛地应用到社会的各个服务领域,该文运用排队理论分析了排队系统的三个组成部分、性能的指针和模型,设计出排队系统模型.运用C++语言完成接口设计以及排队系统指针的计算程序,利用QT完成界面设计.     

“云终端”在高校校园网络中的应用

基于云终端机的网络,以其“易管理、便操作、免维护、低成本”等独特优势,克服了无盘工作站客户端模式和以PC机作为客户端的客户机/服务器网络的诸多问题,能在高校校园网多媒体网络教室、网络办公系统、数字图书馆与电子阅览室等方面得到广泛运用。     

Keeping the Beast at Bay: Fighting Mold at the University of Missouri-Columbia Journalism Library

SUMMARY

This article illustrates the course of action taken by the staff of the University of Missouri Journalism library during a mold outbreak in the Fall Semester 2006. While the parent library system, the University of Missouri-Columbia Libraries had a disaster plan in place, multiple issues occurred that subsequently changed the course of action over the 3 weeks of the cleanup. Those involved took swift action to save a unique journalism collection, and the ultimate results were positive. Consequences of these decisions are discussed. Suggestions for other libraries facing similar circumstances are provided.     

Higher Education,the Production Function,and the Library

No abstract available for this article.     

Google Scholar Usage: An Academic Library's Experience

Google Scholar is a free service that provides a simple way to broadly search for scholarly works and to connect patrons with the resources libraries provide. The researchers in this study analyzed Google Scholar usage data from 2006 for three library tools at San Francisco State University: SFX link resolver, Web Access Management proxy server, and ILLiad interlibrary loan server. Overall, the data suggested that Google Scholar had become a very useful resource in the library and was a significant addition to the library's collection of research databases. SFX data revealed requests from Google Scholar grew ten-fold from 2006 to 2011, and that Google Scholar became the top-ranked SFX source for requests in 2011. Library patrons favored Google Scholar over San Francisco State University's federated search tool, MetaLib, and it has become an important source for interlibrary loan requests. Analysis of San Francisco State University usage data will assist other libraries in their decisions about the implementation of Google Scholar.     

基于H.264的嵌入式网络视频服务器

本文介绍了一种不同于其它软件算法实现H.264视频压缩技术的嵌入式网络视频服务器的设计方案,采用以硬件方式实现H.264视频压缩的双核处理器,配以音视频解码模块、以太网模块、存储模块、各种接口模块等,设计出真正实现H.264的网络视频服务器。     

浅析校园网安全防范

本文结合本校的实际情况,从病毒防范及服务器安全策略两方面初步探讨校园网的一些安全防范措施。