综合自动化仿真变电站培训系统的应用

中原油田35KV/6kV综合自动化仿真变电站是一套能够提供真实的变电站培训环境,集倒闸操作、微机保护装置、后台监控软件组态及操作、变电站一、二次故障处理等培训功能,可完成对变电站电气工作人员的技能培训、鉴定、考核,对提升电气工作人员的技术水平,确保油田电网安全和可靠运行具有重要作用。     

华北电力大学科技园

电力行业的仿真及培训系统，变电站／集控站／区电网智能仿真培训系统，电机学多媒体辅助教学培训软件     

仿真系统在电力培训中的管理与应用

阐述了仿真系统在电力培训中的重要性,着重介绍变电站仿真系统的功能应用与管理。     

基于组态软件的变电站仿真培训系统的设计

以组态王（KINGVIEW6．53）为开发平台,以在运变电站为原型,对变电站进行了仿真实现。该系统不但很好地仿真了变电站的倒闸操作、各种故障,而且还具有实时数据显示、实时及历史曲线、报警记录、报表等功能。整个仿真系统操作方便,可以应用于变电运行的教学和培训。     

110KV变电站仿真培训系统的设计与实现

以组态王（版本6．53）为开发平台,以在运110KV变电站为原型对变电站进行了仿真实现,该系统不但很好地仿真了变电站的倒闸操作、各种故障,而且还具有实时数据显示、实时及历史曲线、报警记录、表报等功能。整个仿真系统操作方便,可以完成变电运行的教学和培训。     

铁路运输调度仿真培训系统的设计与实现

针对调度员培训缺乏有效手段、培训质量不高的现状,提出利用计算机信息技术仿真调度员真实的工作条件,开发调度指挥仿真培训系统的思想,并从系统功能目标、结构设计等方面对该系统进行了论述。运用该系统,可使调度员真实场景中模拟学习,有效提高调度员的培训效率与培训质量。     

综合自动化变电站仿真系统的研制

本文介绍了综合自动化变电站仿真系统研制的必要性,并对其软硬件基本结构进行了说明,提出了运行人员进行仿真培训的意义。     

数字化牵引变电站系统配置教学

随着电气化铁路的发展,对牵引变电站的综合自动化也提出了迫切需求,数字化牵引变电所成为发展的必然趋势。本文针对变电站值班员的岗位职责,对数字化牵引变电站系统配置的教学内容进行了模块化设计(电气基础知识、一次系统配置、变电站电气二次回路配置、保护装置配置),结合理实一体化的教学理念,采用成都交大许继电气有限公司研发的变电所综合自动化仿真及培训系统作为学生实训的主要工具,设计了一体化的教学模式。     

变电站三维实景平台开发与应用

为提高电力操作过程的可视化、精细化、可视化和安全性水平,开发了变电站三维视景预览平台。为提高电力操作过程的可视化、精细化、可视化和安全性水平,开发了变电站三维视景预览平台。给出了基于整个三维场景的变电站构建过程的详细步骤。变电站三维场景预览平台可用于真实场景的仿真训练、方案的可视化制定和运行过程的真实预览。提高了变电站运行人员的工作能力和设备的安全性,有力保障了变电站的安全运行。     

数控仿真软件与CAD／CAM钦件结合应用实例

在数控培训中采用模拟仿真与真实操作相结合的方式,既可以降低培训成本爻可提高培训效果。而在模拟仿真的过程中仿真软件和CAD／CAM软件都可以实现对加工过程中的刀具轨迹进行实时仿真。但其各自的训练重点不同,本文以实际零件为例来介绍数控仿真软件与GAD/CAM软件的结合应用。     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

To serve and promote science development via innovation

CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

Tracing the origin and early radiation of birds——Paleornithologist ZHOU Zhonghe

With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants."     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

The Information Environment and Universal Service

This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.