金属垂直安定面的后向散射分析

采用射线跟踪和等效电流等方法计算金属垂直安定面的后向散射场和后向散射截面积(RCS)。对TM入射和TE入射在不同的入射角下求得数值结果。仔细分析了外形对后向RCS的影响,并提出压缩后向RCS的措施。     

RLC串并联电路的等效互换问题探讨

通过对RLC串并联电路的分析 ,推导出串并联电路等效互换后计算电路参数的统一表达式 ,并对两个元件的串并联电路等效互换进行了讨论。     

霍尔效应回转器

本文从理论上论证回转器是一种具有回转阻抗性能的传输元件,可用霍尔效应实现回转器。     

建筑业项目经理的压力状况调查

建筑企业自身在市场中所面临的竞争压力是不可避免的,而企业中内在的缺陷与不足也会为企业带来一定的压力.过多压力不仅有害于员工的身心健康,而且会给企业带来巨额的经济损失,项目经理是建筑企业项目得以实现并获得长远发展的关键角色之一.此项研究在调查问卷的基础之上,调查了我国建筑业项目经理压力水平,并从项目经理的职业特点出发,分析了我国项目经理压力水平偏高的原因,为我国建筑业实行压力管理迈出了重要的一步.     

The influence of risk and protective factors on burnout experienced by those who work with maltreated children

The aim of the study was to explore the degree (and type) of burnout and trauma symptoms, personal histories and coping strategies retrospectively reported by those who work with maltreated children and their families. A self‐selected sample of workers (N = 44) completed a self‐report questionnaire assessing childhood maltreatment, family background characteristics, current adjustment, coping strategies and burnout. Workers reported high levels of emotional exhaustion and depersonalization, and a low to moderate sense of personal accomplishment. Family background characteristics predicted the occurrence of maltreatment and current adjustment, and a personal history of maltreatment predicted current trauma symptoms, but not burnout. Workers most frequently used problem‐focused coping strategies and sought social support; however, coping strategies were not associated with the level of either trauma symptoms or burnout. Despite employing positive coping strategies, their efficacy may be affected by other interpersonal, intra‐individual and job resource issues. Copyright © 2002 John Wiley & Sons, Ltd.     

接收天线等效电路的严格推导

从场的观点出发,利用反应概念并结合互易定理严格证明了接收天线可以等效为传统基于开路电压的等效模型,并指出了当电场分别与接收模式下和发射模式下的电流作反应时,将得到不同的等效电路参数;结合偶极子天线的数值例子,说明了传统的开路电压模型在接收系统的分析中更为方便、合理。     

等效法在物理教学中应用规律的探讨

本文研究了等效法在中学物理教学中的应用，并结合一些具体实例进行了分析，对中学物理教学有一定指导意义。     

基于多模态学术英语口语语料库的中国理工科大学生单词重音位移研究

基于自建多模态学术英语口语语料库对中国理工科大学生单词重音位移进行研究,分析了主要单词重音位移、主要单词重音位移分布、不同年级不同性别学生之间重音位移标准频数以及是否具有显著性差异。研究表明,单词重音位移主要发生在多音节词发音中,并且单词重音位移至第二音节的频次最多。从不同年级、不同性别学生之间的对比分析来看,一年级学生重音位移标准频数多于二年级学生,女生重音位移标准频数多于男生,但不同年级、不同性别学生之间重音位移均不具有显著性差异。在总结研究结果的基础上提出教学和学习建议。     

An Interdisciplinary Perspective on Disasters and Stress: The Promise of an Ecological Framework

This integrative literature review examines the sources of the persistent debate over the influence of disasters on individual mental health that characterizes the disaster research literature. Using an interdisciplinary approach, this paper highlights how the connections between individuals and the systems in which they are embedded influence people's varied responses to disaster. Consistent with the emerging emphasis in the social sciences on contextualizing individual behavior, this paper examines how family, community, social structural, cultural, and environmental factors affect the development of stress in disaster populations. It concludes with recommendations for policy, practice, and research related to disaster recovery.     

曲线箱梁桥实用设计方法的研究

曲线箱梁桥目前还缺乏比较实用的设计方法．本文对曲线箱梁桥的现有设计方法作了研究，并推荐一种实用设计方法：采用空间梁单元，每个节点取六个自由度；等效梁格的模拟考虑了横向梁格附近有无横隔梁的情况．结果证明，这是一种简便、较精确的设计方法．