无线网状网技术与应用

无线网状网(WMNs)由网状路由器节点和客户机节点组成,其中的网状路由器节点组成了无线网状网的网络骨干,其移动性很小。他们一起为无线网状网和其他常规无线网络的客户机节点提供网络的无线接入。WMNs技术结合了中心式控制的蜂窝网与分布式控制的无线自组织网的优点,可有效克服这两种技术的缺陷并显著提高无线网络的性能,已经成为下一代无线通信网络的研究热点之一。WMNs可为无线个域网、局域网、校园网、城域网的一系列应用提供高速无线宽带接入服务。虽然目前WMNs技术发展很快,但其协议栈各层仍存在许多有待研究的课题。首先简要介绍了无线网状网的结构与特点;随后重点分析了其主要的几个应用领域;最后探讨了WMNs各协议层的研究现状与关键技术,并分析了该技术存在的问题及未来的研究方向。     

有限转角无刷力矩电动机位置伺服系统的电流控制

提出了有限转角无刷力矩电动机 (LABLTM)位置伺服系统电流控制策略 ,给出了实施方法 ,进行了开关管频率特性的分析。该方法可实现在不同误差时自动调节电动机电流 ,进而控制输出转矩 ,并具有稳态精度高、动态响应快等特点。     

Employment status passages and psychosocial well-being.

Medical students entering the labor market were studied to find out whether the improvement of psychosocial well-being depends on characteristics of their careers. Psychosocial well-being was described on the basis of psychosomatic stress symptoms, psychological distress (General Health Questionnaire), and strain resistance resources (Sense of Coherence). The 3-year follow-up showed that among women the improvement of strain resistance resources was delayed in the group with several entries into work. Among men the findings suggested associations between stress symptoms and career characteristics. Most of the results, however, did not support the hypothesis about the division of the participants into those with a stable career and improving well-being and those with a fragmented career and low well-being. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

某炼油厂一级浮床除盐系统阳床工艺特性及调整试验

论述了某厂一级除盐系统阳床工艺特性及调整试验过程，对存在问题进行分析并改进，得到了实际运行最佳方式和参数，取得良好效果。     

调节阀流量特性控制分析

介绍了调节阀的流量基本知识，从控制理论的角度，分析了调节阀的理想流量特性、工作流量特性和系统稳定性，指出了在热工领域内应用调节阀时的一些注意事项。     

光纤模式噪声的研究

综述了光纤模式噪声的产生、计算，并介绍了减小它的一些方法。     

基于GIS技术的安徽省重大农业气象灾害测评系统总体设计

对《基于GIS技术的安徽省重大农业气象灾害测评系统》的总体设计方法作了概要介绍。该系统的建立主要是采用GIS技术，综合气候分析、遥感监测、地理环境影响评判等方法，提高对安徽省干旱、洪涝、低温冻害等重大农业气象灾害实时监测、趋势预测，以及对农业生产影响的分析评价结果的准确性。     

钒钛磁铁精矿的烧结特性及强化措施

阐述了钒钛磁铁精矿的矿石特点，烧结特性及其与烧结矿质量之间的关系，并提出了强化烧结的措施。     

The development and maturation of humanitarian psychology.

Humanitarian psychological support as an organized field is relatively young. Pioneers in the field were involved primarily in providing psychological support to refugees and internally displaced persons in conflict and nonconflict situations. This article describes basic principles for the design of psychological support programs and interventions. The International Federation of Red Cross and Red Crescent Societies (IFRC) began a psychological support program in 1991. The IFRC chose psychological first aid as its model for implementation in developing countries. Psychological first aid fits all the principles for psychological support program design and is adapted to individual communities. The first generation of psychological support programs differed dramatically depending on the countries in which they were developed. A second generation of psychological support programs evolved in response to the earthquake/tsunami of December 26, 2004. The Inter-Agency Standing Committee international guidelines consolidated the advances of second-generation programs and provided a clear indication of the wide acceptance of the importance of psychological support. A glimpse is provided of the third generation of psychological support programs, and an admonition is made for a more empirical evaluation of the effectiveness of interventions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

可调链式切皂机的结构设计

阐述了可调链式切皂机的设计思想、工作原理、结构特点、机械特性及设计注意事项。