首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 58 毫秒
1.
计费系统的模型是计费系统的核心组成部分,计费系统模型的性能直接影响到计费系统的性能.本文针对现有计费系统模型的弊端,提出一个新的模型.经实验证明此新的模型支持新的费率,支持扩展,而且更加的灵活,更加的稳定,并且具有一定的通用性.  相似文献   

2.
BOSS是一个日益产品化的庞大的系统工程,在Oracle 9i数据库的COST工作方式下,为确保SQL语句的执行计划的稳定和最优性,这就要求制订一套详细的表和索引的分析计划,并根据BOSS的数据特点和实施时间要求,制订一套切实可行的实施计划,本文根据实际的BOSS项目的实施经验,充分阐述了BOSS割接的各个阶段的分析的使用,给类似BOSS的大型系统的实施提供一个思路和参考.  相似文献   

3.
近年来,网络的性能问题日益成为人们关注的焦点.而网络的吞吐率又是其中的一个非常重要的性能指标.简要介绍了用于测试TCP吞吐率的工具TTCP,并且重点阐述对TTCP改进方面的思想和具体的实现.最后,利用改进的TTCP对网络的吞吐率进行测试并详细分析了实验的结果.  相似文献   

4.
在OSGi服务平台中,服务的注销会使和该服务相关联的ServiceReference引用和服务引用过时,过时的ServiceReference引用和服务引用会带来许多问题.但服务什么时候被注销,无法预先知道,且无普遍实用的判定ServiceReference引用和服务引用是否过时的算法.本文通过对OSGi服务平台核心事件的产生和投递过程深入细致的分析,提出了判定ServiceReference引用和服务引用是否过时的方案.  相似文献   

5.
交互是网络教育体系的一项重要内容,对网络教育的效果产生直接的影响,网络教育的交互是以媒体为中介的交互,目前常用的网络交互平台还无法满足学习性交互的需要,研究和探索适应于网络教育的交互平台是网络教育向深度发展的迫切需要.基于网络的维客和播客是新型的网络交互平台,其内在的特点决定了其将成为构建网络教育交互平台的最佳选择之一.  相似文献   

6.
计算机病毒的感染、木马、以及黑客的入侵等,给计算机带来了不同程度的损害.本文阐述了计算机病毒的特性、感染原理,以及它对网络与信息安全的危害,提出了计算机病毒的相关防范措施.  相似文献   

7.
《自动化技术与应用》2007,26(7):137-138
[引言] 春风化雨,润物无声,所描述的是一种潜移默化改变事物的巨大力量,尤其是当这种力量具有仁与善的本质的时候.而今,在工业自动化市场群雄纷争的年代,能够透过纷纷扰扰的利益竞争,始终将自己的事业与社会责任感联系在一起的领导者却显得愈发珍贵了.所幸的是,我们还可以去讲述这样一个人,和一个苦心孤诣十余载的精英团队.  相似文献   

8.
刘勇奎  李笑牛  云健 《计算机工程与设计》2007,28(23):5680-5681,5794
提出了一种三维物体表面的逼近表示与数据压缩方法.该方法可以在不增加表示物体表面的数据量(例如面片数量)的情况下,使逼近误差降低约1/2;在逼近误差不变的情况下,使表示物体表面的数据量大幅下降.提出了用与最基本的三维物体--球体表面相交的面片来表示球面的方法,将该方法扩展到了一般曲面.理论分析与实验数据表明,新算法与传统方法相比,其数据压缩比约为35%.该研究在虚拟现实技术和三维模型的数据压缩及传输等领域有较重要的学术及应用价值.  相似文献   

9.
张兆雷  佟秋利 《计算机应用》2007,27(Z2):219-221
基于Struts的web项目在开发和维护的过程中,系统结构会逐渐偏离最初的设计,影响系统的性能和可维护性,为了保证系统正确运行,需要对系统结构进行修复.根据对校园信息化系统的一个web项目进行结构调整的实例,通过分析Web系统的特性,提出适用于Web系统结构修复的方法,包括实施的原则和流程.这个方法的优势在于通过较少的工作量就可以显著改善Web系统的结构,增强系统的可维护性.  相似文献   

10.
计算机系统的补丁管理已经成为计算机系统安全的一个重要组成部分.在现有技术下,如何完整、规范地为需要严格与Intemet隔离的内联网计算机用户分发和安装补丁是一个较为突出的问题.文章在微软免费的WSUS(Windows Server Update Services)服务基础上,开发出一套基于Windows平台的内联网补丁管理系统,弥补了WSUS系统的不足,提出了一种解决该问题的方案,并已经在中国人民银行浙江省范围内的分支机构中使用,具有很好的效果.  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号