考虑用户需求不确定性的电力期货合同模型

提出一种考虑用户需求不确定性的可选择期货合同模型,并从用户角度给出了确定相应各种合同参数的方法,算例分析表明了该方法的合理性。该方法适用于用户的合同定价决策。     

考虑供电公司风险的激励性可中断负荷合同模型

考虑到供电公司的风险偏好及用户的可中断电量，应用委托代理及机制设计理论建立了一种用户类型离散的可中断负荷合同模型。分析和算例结果表明，无论供电公司的风险偏好如何，该合同模型均能引导用户披露真实信息，实现电力资源的有效配置，且供电公司能从中节约供电成本。因此，激励性可中断负荷合同不仅能提高用户需求弹性．还有助于供电公司回...     

签名中嵌入用户身份信息的公平合同签署协议

通过在Schnorr签名中嵌入用户的身份信息设计了一个公平的合同签署协议。与已有的没有嵌入用户身份信息的合同签署协议相比,该协议具有更好的公平性。另外本协议还引入了n个离线的半可信第三方,分析表明这不仅实现了签名者隐私的保护,还有效地降低了签名者中的一方与离线半可信第三方合谋来获取另一方签名的概率,它的理论基础是公开可验证秘密分享。     

基于防篡改技术的电子签约服务平台

信息互联网的快速发展推进了电子商务的广泛应用,用户身份被盗用、电子合同的易篡改性严重影响了网上电子交易的公平性与安全性.对于交易主体来说,如何确认交易对方的数据身份未被冒用,如何确认交易的电子合同为对方发送且未被截获篡改是需要首要解决的关键问题.通过结合用户身份认证、电子合同加密传输、公证处参与公证等方法进行电子签约服务平台的设计,确保用户身份的唯一性、传输数据的完整性和不可篡改性、签约过程的可追溯性,实现了平台使用的公平公正性.     

签名中嵌入用户身份信息的公平合同签署协议

通过在Schnorr签名中嵌入用户的身份信息设计了一个公平的合同签署协议。与已有的没有嵌入用户身份信息的合同签署协议相比,该协议具有更好的公平性。另外本协议还引入了n个离线的半可信第三方,分析表明这不仅实现了签名者隐私的保护,还有效地降低了签名者中的一方与离线半可信第三方合谋来获取另一方签名的概率,它的理论基础是公开可验证秘密分享。     

一种实用的通用报表动态生成方法

介绍了一种通用报表的动态生成方法，这不仅为用户提供了便利的使用功能，而且也为开发者指出一条简洁、灵活、实用、可维护性强的报表生成途径。按该方法编制的ＧＲＥＰＯ程序应用于外贸合同管理系统之中取得了良好的效果。     

陕西GSM扩容 北电网络获2700万美元订单

11月3曰获悉,陕西移动通讯公司与北电网络签订了价值达2700万美元的合同,用于扩容陕西省GSM 900无线网络。届时其网络支持用户数将增加50％。西安市的用户也能增长40多万,达到近80万用户的规模。据悉,该项目预计于1999年底完成。     

网格合同计算的有效协商机制研究

随着网格商业化的不断深入,网格计算要求：服务提供者和消费者间在组合服务中需达成端对端的高服务质量协议,高可靠性的组合服务协商机制和保障机制在网格计算中扮演着越来越重要的角色。所提出的网格合同计算模型,在组合服务过程中提供统一的用户接口,使交易双方自动动态协商满足每个单独服务的服务质量约束条件。在网格合同计算模型中,利用代理技术实现了自治网格合同计算协商机制,该协商机制遵循改进的两阶段提交FIPA协议。在服务合同中导入了软服务合同SSC和硬服务合同HSC概念,并指出动态绑定服务之前所生成的软服务合同SSC仅仅起到占位符的作用,只有在绑定时通过“硬化”才获得真实的服务承诺。     

应用动态

记者刘源报道 近日,广西移动通信公司与爱立信公司为其GSM数字移动通信网络第九期扩容工程签署了一份价值约八千六百万美元的合同。南京爱立信通信有限公司是该合同的设备供应商,它是爱立信公司在中国最早设立的合资企业。有关设备将与今年七月开始发货。该项目完成后,广西移动通信公司的GSM数字移动通信网络容量将增加到220万户,届时,广西移动通信用户将可享用     

到网络游戏中去做广告

这个年代,我们注定无法逃避麦当劳的品牌广告,即便是遁到网上,即便是躲进网络游戏中去。 9月17日 ,美国 Electronic Arts公司与英特尔和麦当劳签署了数百万美元规模的网上广告合同。通过该合同,当用户在玩该公司即将在秋季推出的人气游戏网络版“模拟人生网络版（The Sims Online）”时,将会看到英特尔公司和麦当劳公司的商品和商标。     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

煤矿井下安全监控分站的设计及其仿真实现

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.     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.