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关键词： 程序界面   工具条   启动   应用模块   按钮   菜单   显示   方式   系统   状态信息  

摘要： 一个较大型的系统一般都需要一个总控程序，这个总控程序负责启动各个应用模块，有的还包括系统管理功能，显示一些系统的状态信息等。应用模块(程序)的启动一般有这样几种方式：通过菜单启动，通过工具条按钮或普通按钮启动。我在这里介绍的总控程序界面，它启动各个直用模块是通过另一种方式：透过图象影射方式启动，见下面的程序界面的图片。

关键词： 光链路   分光比   星型拓扑   树型拓扑   Java小程序  

摘要： 介绍光链路设计的原理和公式 ,给出光链路设计的Java小程序实现 ,以期有效解决在手工进行光链路设计及计算中存在的问题。

关键词： 混合编程   计算性能   JNI   并行程序设计方法   机群   CPU   科学计算   粒子模拟   计算量   测试  

摘要： 本文介绍了如何用Java实现粒子模拟的面向对象的并行程序设计方法 ,并在由 1 6个Pen tiumIII 1 .6GCPU组成的微机机群上测试了其性能。同时 ,为了提高它的计算性能 ,我们还介绍了利用JNI实现Java和Fortran混合编程的方法 ,即把程序中计算量较大的部分用Fortran语言代替 ,以提高其计算性能。结果表明 。

关键词： ENGINEERING   TECHNOLOGY   DISTRIBUTED computing   ALGORITHMS   TRANSPARENCY (Optics)   COMBINATORIAL optimization  

摘要： As computers continually improve in performance and decrease in manufacturing cost, distributed systems consisting of multiple computers implemented as parallel computation platforms have become viable for engineering applications which demand intensive computation power. This paper proposes an extended version of a previously developed low cost parallel computation platform called para worker. The system is based on a cluster structure which is a form of a distributed system. The new system is termed para worker 2 which differentiates it from the earlier system. The new proposed system adds enhanced features of improved dynamic object reallocation, adaptive consistency protocols, and location transparency. Performance of the para worker 2 has proven to be superior to the para worker. Testing was based on oil execution of Genetic Algorithm to solve the Economic Dispatch problem in Power Engineering. The proposal is particularly useful for the implementation and execution of computational intelligence techniques such as evolutionary computing for engineering applications.

关键词： Array Comparative Genome Hybridization   Genomic Context   Chromosome Axis   arrayCGH Data   General Feature Format  

摘要： Background: Microarray-based comparative genome hybridization experiments generate data that can be mapped onto the genome. These data are interpreted more easily when represented graphically in a genomic context. Results: We have developed Caryoscope, which is an open source Java application for visualizing microarray data from array comparative genome hybridization experiments in a genomic context. Caryoscope can read General Feature Format files (GFF files), as well as comma- and tab-delimited files, that define the genomic positions of the microarray reporters for which data are obtained. The microarray data can be browsed using an interactive, zoomable interface, which helps users identify regions of chromosomal deletion or amplification. The graphical representation of the data can be exported in a number of graphic formats, including publication-quality formats such as PostScript. Conclusion: Caryoscope is a useful tool that can aid in the visualization, exploration and interpretation of microarray data in a genomic context.

关键词： Computer software   Business intelligence   Sales forecasting   Business planning   Java (Computer program language)  

摘要： This article reports that SAP AG has added capabilities to its Netweaver platform to help organisations run mission-critical Java applications. It also plans to add business intelligence functions next year. The company made a raft of announcements at its TechEd '04 developer conference in San Diego last week. Enhancements to Netweaver included Java virtual machine technology to limit the impact of errors in Java applications running simultaneously. This could save time and cut costs for Java systems administrators in writing and testing Java applications, said SAP. Michael Barnes, vice-president at analyst firm Meta Group Inc., said enterprises could benefit from SAP's J2EE standards-based system, providing it could ensure the stability of Java applications. Also SAP said it would include business intelligence in the 2005 release of Netweaver to help companies make more accurate sales forecasts, enhance supplier relationships and increase the effectiveness of marketing campaigns. SAP said it would extend Netweaver's master data management module, which handles customer, product and supplier information.

ISBN: (纸本)7302097674

关键词： 超时   Java程序   I/O操作   非阻塞   Java应用程序   JDK   Java语言   作功   网络   模式  

摘要： 本文讨论了网络超时在基于套接字的 Java语言网络编程中的简单处理 ,分别就连接后和连接时两种情况 ,提出了让 Java应用程序具有非阻塞模式 I/ O操作功能的方法 ,并且介绍了在新的 JDK 1.4 .x环境下 ,获得非阻塞模式 I/ O操作功能的方法。

关键词： C语言   Visual   C++   Java   程序设计语言   菜单制作  

摘要： 通过菜单的设计制作了解应用编程技术的步骤和不同编程语言的优劣,促进学习与应用相结合的目的。

关键词： experience   computer science   Programming   level of abstraction   Computer personnel   Graphic methods   Java programming language   programming environments   Language   Introductory Courses  

摘要： Building upon years of evolution in object-oriented programming language design, Java has emerged as the language of choice among many educators for teaching introductory computer science. A clean, type-safe language, Java provides a garbage collected heap and a comprehensive exception-handling mechanism. However, in spite of this support, many students in introductory computer science courses still find programming to be an overwhelming source of frustration. Linguistic concerns and programming mechanics demand so much attention that deeper concepts are often postponed for later courses, leaving students in introductory courses with the mistaken impression that computer science is a shallow discipline, concerned only with transcribing ideas into code, and not with the ideas themselves. JPie is a tightly integrated programming environment for live software construction in Java. JPie treats programming as an application in its own right, providing a visual representation of class definitions and supporting direct manipulation of graphical representations of programming abstractions and constructs. Exploiting Java's reflection mechanism, JPie supports the notion of a dynamic class that can be modified while the program is running, thereby eliminating the edit-compile-test cycle. Following years of experience using Java as the vehicle for teaching introductory computer science, we have designed JPie to provide a more natural and fluid software development process that both raises the level of abstraction and eliminates many of the common pitfalls that beginning Java programmers face. This paper studies JPie from an educational perspective. We systematically review key programming abstractions and explain how JPie supports them in ways that keep beginning programmers focused on important ideas. Our experience using JPie in an introductory computer science survey course for non-majors is briefly discussed. (C) 2004 Elsevier B.V. All rights reserved.