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关键词： Java   Collaboration   Databases   Local area networks   Wireless networks   Mobile communication   Object oriented modeling   Application software   Programming profession   Delay  

摘要： Introducing the factors of wireless mobile systems into the development of collaborative applications complicates developers' lives significantly. Application frameworks targeted for coordinating wireless mobile applications simplify development. The authors describe Sync, a development framework that provides high-level primitives that enable programmers to create arbitrarily complex, synchronized, replicated data objects. Designed for wireless networks, Sync enables applications to share changes at a granularity as small as updates to basic types and so enables better performance on low-bandwidth connections.

关键词： 程序理解   面向对象方法   超文本   软件维护   WWW济览器  

摘要： 程序理解是软件维护和软件构件重用的基础,该文针对面向对象的程序设计语言,主要以Internet上最有影响的Java语言为对象,研究其源程序分析理解技术,设计了一个基于超文本的Java源程序辅助理解系统原型(HJAUS).在该文中,提出了结构化框架文本的概念,在此基础上给出了把源程序线性代码文本变换成结构化折叠文档的算法,并研究了以框架文本为基础的面向对象源程序的递归下降分析方法.系统原型采用Intranet实现方案,利用WWW济览器作为运行环境,实现对源程序代码的超文本浏览,并建立类层次图作为阅读源程序的导航手段,使用户容易对整个源程序的结构和功能建立整体概念.系统还具有记录源程序理解成果的功能,以支持异地协作的原程序理解.

关键词： Java程序   动态参数   传递   编程  

摘要： 传统的超文本主页只能显示静止图像,在其他有关程序的支持下可显示视频信息,利用CGI(Common Geteway In—terface)程序实现客户机和WWW服务器间的交互访问。随着网络技术的发展,人们对于动态主页的需求越来越强烈,

关键词： JAVA   CGI   环境变量   HTML   程序设计   程序语言  

摘要： JAVA 是一种面向对象的语言,它提供与分布式对象及数据库系统的联接。面向对象的语言非常适合于创建和维护大型、复杂的 CGI 程序。使用 JAVA 编制 CGI 程序是用户的最佳选择。该文将向您介绍一种使用JAVA 编制 CGI 程序的方法。

关键词： WWW   Java   应用程序小块   图书馆自动化   情报工作  

摘要： 本文阐述了新一代编程语言 Java对未来图书情报领域所带来的深刻影响 ,通过一个实例说明了用 Java将图书情报专业中一些实用统计功能实现为 Web页中应用程序小块的方法。

关键词： JAVA语言-程序设计   程序设计-JAVA语言  

关键词： MORTGAGE loans   SOFTWARE  

摘要： Reports that Network Computing Projects, a division of IBM Corp., has completed its first project of designing a Java-based mortgage loan applet for CERA Bank in Belgium.

关键词： COMPUTER software  

摘要： Features the Java-based application development software Vibe produced by Visix Software Inc. Features; Capabilities; System requirements.

关键词： Cyclization   Diethyl dicarboxylates   Isotope labelling   Kinetic energy release  

摘要： Changes of in situ seismic attenuation with depth are estimated from full waveform acoustic logs in a soft formation (rock with shear velocity less than borehole fluid velocity). The relative attenuation Q(p)(-1) is computed from the variation with depth of the P wave amplitude spectrum of a single source receiver pair. The method is applicable when unknown source and receiver responses of the sonic tool make other methods difficult to apply. Tests with synthetic data generated by a full waveform method verify that in a soft formation the decay of the P wave amplitude spectrum depends mainly on attenuation. The method is applied to Ocean Drilling Program data from holes 806B and 807A on the Ontong Java Plateau in the western Pacific Ocean. Four attenuation logs were computed independently using data from four source receiver pairs. Agreement of the four logs at each site and agreement of results from the two sites suggest that the method is robust and practical. The attenuation logs show a maximum attenuation between 300 and 500 m below the seafloor. They agree well with compilations of high-frequency attenuation versus porosity and frequency in marine sediments but are somewhat greater than results from seismic experiments, possibly owing to the presence of sedimentary microbeds and the three-decade difference between the seismic and sonic frequency bands.