超大电尺寸目标的物理光学高效算法分析

根据物理光学理论、理想导体边界条件和阻抗边界条件,建立了理想导体及有耗介质涂敷其表面的电大尺寸平板的物理光学高效算法公式,并将此公式推广到圆柱和球等相似表面。通过计算,给出了平板及圆柱的验证结果。以一个超大电尺寸目标RCS的计算实例充分证明了该方法的高效性和实用性。     

电磁场中的K-G方程相对论传播函数的解法

本文首先给出单个荷电粒子在电场中的相对论Klein-Gordon方程。然后导出自由K-G方程的自由传播函数;利用该传播函数求得电磁场中的K-G方程解的积分表达式。最后,对多个荷电K-G粒子在电磁场中的方程解法进行了探讨。     

MTEMcell中场的均匀性分析

利用直线法对具有任意宽度芯板的变形横电磁波小室（ＭＴＥＭｃｅｌｌ）进行了分析，得出了电场分布的计算公式。根据数值计算结果，讨论了ＭＴＥＭｃｅｌｌ中场分布的均匀性，并计算了特性阻抗。     

多个浅埋地三维介质体的电磁散射

对介质体电磁散射问题采用电场积分方程建立了多个埋地均匀介质体的数值模型。对积分方程中并矢格林函数各分量所含的索末菲积分,应用离散复镜像理论化为闭合形式,简化了计算。本文针对双孔电磁波法情况,及单孔发射地面接收仅由散射体产生的垂直地表面的磁场,作了理论计算。所得结果对分析解释浅层实测数据有参考价值。     

Perception of Risks From Electromagnetic Fields: A Psychometric Evaluation of a Risk-Communication Approach

Potential health risks from exposure to power-frequency electromagnetic fields (EMF) have become an issue of significant public concern. This study evaluates a brochure designed to communicate EMF health risks from a scientific perspective. The study utilized a pretest-posttest design in which respondents judged various sources of EMF (and other) health and safety risks, both before reading the brochure and after. Respondents assessed risks on dimensions similar to those utilized in previous studies of risk perception. In addition, detailed ratings were made that probed respondents' beliefs about the possible causal effects of EMF exposure. The findings suggest that naive beliefs about the potential of EMF exposure to cause harm were highly influenced by specific content elements of the brochure. The implications for using risk-communication approaches based on communicating scientific uncertainty are discussed.     

在电磁兼容性研究中的互易定理

回顾互易定理的基本原理及其在电路理论和电磁场理论中的表示式，并讨论互易性在传导干扰问题和辐射干扰问题分析中的应用。对称和非对称的线路滤波器被用作为传导干扰中互易性的例子；还讨论了对微弱信号进行检测时，由于嗓声干扰使结果与互易性不符。在电磁兼容性测试中，互易定理的应用遇到一些困难，本文将讨论这个问题，并给出有用的结论。     

圆柱周期二维折皱波导的散射理论

以边界扰动源法对普遍的周期二维任意折皱圆柱波导对电磁导波的散射进行了理论研究。导出了关于ＴＥ波和ＴＭ波的完整的散射电磁场和Ｅｆａｇｇ散射条件的普遍在达式，并以任意一雏Ｚ向析皱作为例子，求得了其具体结果。所采用的边界扰动源法，在折皱为非渐变情况下，例如矩形拆皱，比耦合模理论更为优越。所得结果可以用来分析反射器、模式变换器以及光栅和选择性谐振腔等。     

“Heating Is More Important Than Food”

Abstract

Fuel poverty is estimated to affect millions of people in the UK, and older people are especially vulnerable. Most research into fuel poverty has drawn upon quantitative paradigms. The aim of this study, therefore, was to investigate the perceptions and experiences of older women in relation to fuel issues. Ten qualitative semi-structured interviews were undertaken during the winter of 2005. The interviews were tape-recorded and transcribed verbatim. A phenomenological approach was used for analysis. Four main themes emerged: causes of fuel poverty; managing money; heating is a priority;and government initiatives. The results from this study show that fuel poverty is an important health and financial concern for older women.     

冷热电联产系统评价指标体系的研究

对如何建立冷热电联产(CCHP)系统综合评价指标体系进行研究,提出了一种CCHP系统综合评价指标体系的建立方法：首先构建设计框架,再将指标整理并按属性归类,形成多层次的指标体系,最后用主成分分析(PCA)法对指标体系进行修正。据此方法,建立了一套具有一定灵活性的多层次指标体系,该指标体系由固定指标体系和灵活性指标框组成,可用于不同场合的CCHP系统的综合评价。     

冷等离子体中的定向瞬态电磁波

讨论了冷等离子体中的定向瞬态电磁波。通过严格求解冷等离子体中的Ｍａｘｗｅｌｌ方程组，给出了定向瞬态电磁波ＴＭ模的电场及其场型图。结果表明，与在自由空间时相比，在各向同性冷等离子体中，定向瞬态电磁波发生了相移；与等离子体中传播的常规电磁波相比，没有截止频率。这两个特点使其在等离子体中具有极其重要的实用价值。