用于安全稳定控制的高压直流极闭锁判据

交直流并联运行电网中直流极闭锁后引起的安全稳定问题十分突出，如何正确判别直流极闭锁是安全稳定控制系统研究中的重要课题。采用数值仿真方法分析了直流极闭锁对电力系统稳定的影响，指出稳定控制装置必须正确、快速地判出不同形式的直流极闭锁。通过研究直流极闭锁的电气量特征以及直流控制保护系统的动作行为，提出了可靠的直流极闭锁综合判据，并进行了详细的阐述。通过介绍中国南方交直流混联电网安全稳定控制系统核心部分———高肇直流输电安全稳定控制系统，进一步论述了研究直流极闭锁判据及直流极闭锁后稳定控制的重要性。     

公开可得到的无密码水印系统的安全性分析

在许多水印商用场合，水印嵌入和检测软件作为一个黑盒子能够公开地被得到，基于这种水印系统模型，针对目前常用的三种水印嵌入方法进行安全性分析。理论分析表明，攻击者能够在保证电子产品质量的前提下很容易地删除水印，最后，提出相应的改进方向。     

Psychological separation, attachment security, vocational self-concept crystallization, and career indecision: A structural equation analysis.

Structural equation modeling was used to test theoretically based models in which psychological separation and attachment security variables were related to career indecision and those relations were mediated through vocational self-concept crystallization. In contrast to previous studies, which have found either weak or no support for a relation between separation or attachment security variables and career indecision, results based on a sample of 350 college students indicated that some components of separation and attachment security did relate to career indecision in a theoretically supportable direction. Results also revealed that regardless of whether global or component career indecision measures were used, separation and attachment security effects on indecision were at least partially mediated through vocational self-concept crystallization. The strongest mediated relations were observed for the effects of attachment anxiety and maternal separation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于ASK无线数传模块的新型安防系统

将无线数传模块和具有低噪声的策控制电路集成设计为一体，构成检测信号和开关量控制信号无线传输的功能模块，并将该模块嵌入到探头和控制器内部，建立无线通讯子网，应用于智能能楼宇安防系统。很好的解决了无线信息冲突问题。经过试运行，系统工作稳定，无线探头报警可靠性达到了使用需求。     

Evaluation of Handheld Radionuclide Identifiers

Characterization of commercially available instruments for measurement and identification of unknown radionuclides was carried out in support of the development and testing of the American National Standards Institute (ANSI) standard, N42.34, “Performance Criteria for Hand-held Instruments for the Detection and Identification of Radionuclides.” Measurements were based on the performance of the devices, i.e., the capability of the detectors to ensure a correct radionuclide identification in a given time interval for various radioactive sources.     

On an Interactive Network Security Measur

The development of the global information highway has brought great impetus and impact to every domain of the world: science, technology, economy and culture as well. Information security of network as an integrated system engineering needs a long period of tackling key problems and planning in such fields as researching and application. The threats to network security can be classified as: hacking, inside attack, computer virus, leak of secret message and modification of key data in network. …     

Windows NT账户管理的二次开发

论述了Window2000账户管理的缺陷以及如何解决这些缺陷。     

Trust for Ubiquitous,Transparent Collaboration

In this paper, trust-based recommendations control the exchange of personal information between handheld computers. Combined with explicit risk analysis, this enables unobtrusive information exchange, while limiting access to confidential information. The same model can be applied to a wide range of mobile computing tasks, such as managing personal address books and electronic diaries, to automatically provide an appropriate level of security. Recommendations add structure to the information, by associating categories with data and with each other, with degrees of trust belief and disbelief. Since categories also in turn confer privileges and restrict actions, they are analogous to rôles in a Rôle-Based Access Control system, while principals represent their trust policies in recommendations. Participants first compute their trust in information, by combining their own trust assumptions with others' policies. Recommendations are thus linked together to compute a considered, local trust assessment. Actions are then moderated by a risk assessment, which weighs up costs and benefits, including the cost of the user's time, before deciding whether to allow or forbid the information exchange, or ask for help. By unifying trust assessments and access control, participants can take calculated risks to automatically yet safely share their personal information.     

大型电信运营业务支撑系统安全评估方法

大型电信运营业务支撑系统(BOSS)有其独特的复杂性，集中化改造后，对BOSS系统的信息安全保障能力也提出了更高的要求，安全评估方面的考虑也越来越多，从管理和技术两个方面探计了大型电信运营业务支撑系统的安全评估方法。     

关于我国资源保障能力的若干思考

资源保障能力是一国综合国力判断的重要指标之一。本文首先界定了资源保障能力的涵义，然后分析了五个对资源保障能力比较重要的影响因素，即资源禀赋、经济发展水平、科学技术因素、政治因素和人们的资源观，最后得出几点我国提高资源保障能力的建议以供参考。