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。     

阿尔都塞意识形态理论研究述评

阿尔都塞的意识形态理论独树一帜，曾产生过巨大影响。近年来，学术界对其思想的研究日益聚焦在这一方面，并出现一大批理论成果。目前，国内对这一思想的研究主要集中在对其理论渊源、内容、贡献和缺陷的认识等方面。阿尔都塞在诸多方面时马克思主义的意识形态理论都进行了丰富和发展，甚至触及到经济基础和上层建筑相互作用的机制问题，但其捍卫马克思主义的“初衰”并未真正如愿以偿。     

在应对入世后我国农业面临的挑战中分析测试技术和科学仪器担负的重任

本文概叙了入世后中国农业面临的农产品品质 安全性及价格的三重冲击和应采取的应对措施 着重分析了农产品安全问题和食品安全保障体系的构建 论述了分析测试技术和科学仪器的七项重任     

Communication of risk: health hazards from mobile phones

Summary. Possible health hazards from mobile phones arise from the use of the phones themselves and via the base stations that relay signals. Except for an increase in traffic accidents induced by the use of mobile phones in cars the evidence for a health hazard is at most indirect, but it cannot be entirely dismissed; the phones have not been widely used for sufficiently long for direct epidemiological studies to have high sensitivity for detecting any induced incidence of cancer, for example. The background and evidence are briefly reviewed and the steps taken in the UK to make information widely available described.     

论毛泽东关于科学技术的理论及其实践

毛泽东的科学技术思想是毛泽东思想的重要组成部分。可以从三个方面系统分析和探讨毛泽东关于科学技术的理论及其实践。其中关于科学技术的特征及其作用的思想是毛泽东的基本科学技术观;关于科学技术的生产力功能的思想是毛泽东科学技术观的核心内容;关于科学技术的方针和政策的思想是毛泽东的科学技术观及其核心内容的具体体现。它们有机地组成了毛泽东关于科学技术的理论及其实践的主要内容。     

从对信用的考证反观我国民事立法

信用最初是在道德教化层面上使用的。随着社会经济的发展,特别是商品交换的日益复杂,信用这一侧重道德价值的概念逐渐被吸收到民事法律当中,并衍生出诚实信用原则。我国现行民事立法虽然确立了诚实信用原则,但还必须加强对这一原则的价值性和规范性解释,应该合理限制当事人的意思自治和法官的自由裁量权,使其更好地调整民事关系和指导司法实践。     

用谦抑性原则检讨我国刑法对教唆未遂的处罚规定

刑法谦抑性原则的要义就是缩小刑事处罚的范围和减轻刑事处罚的程度。我国刑法第 2 9条第 2款规定 :“如果被教唆的人没有犯被教唆的罪 ,对于教唆犯 ,可以从轻或减轻处罚。”这表明我国刑法对教唆未遂采必罚主义 ,这种做法有违谦抑性原则 ,且不具有可操作性。因此 ,该条款应修改为 :“如果被教唆的人没有犯被教唆的罪 ,如果此罪的法定最低刑为三年以上有期徒刑 ,对于教唆犯 ,可以比照所教唆之罪从轻、减轻或免除处罚。     

基于顾客维度的质量成本管理探讨

在运用平衡记分卡进行企业绩效评价时，顾客视角是一个重要的衡量标准。成本管理作为影响企业绩效的一个重要因素，更应考虑顾客对质量的经济性要求，在质量管理时应从产品提供者的质量管理转变为产品使用者的质量管理。本文从顾客角度出发，在分析传统质量成本模型局限性的基础上，提出了基于顾客维度的质量成本管理修正模型，并对优化企业质量成本管理的相关策略进行了探讨。     

Applicability of a Neuroprobabilistic Integral Risk Index for the Environmental Management of Polluted Areas: A Case Study

Recently, we developed a GIS-Integrated Integral Risk Index (IRI) to assess human health risks in areas with presence of environmental pollutants. Contaminants were previously ranked by applying a self-organizing map (SOM) to their characteristics of persistence, bioaccumulation, and toxicity in order to obtain the Hazard Index (HI). In the present study, the original IRI was substantially improved by allowing the entrance of probabilistic data. A neuroprobabilistic HI was developed by combining SOM and Monte Carlo analysis. In general terms, the deterministic and probabilistic HIs followed a similar pattern: polychlorinated biphenyls (PCBs) and light polycyclic aromatic hydrocarbons (PAHs) were the pollutants showing the highest and lowest values of HI, respectively. However, the bioaccumulation value of heavy metals notably increased after considering a probability density function to explain the bioaccumulation factor. To check its applicability, a case study was investigated. The probabilistic integral risk was calculated in the chemical/petrochemical industrial area of Tarragona (Catalonia, Spain), where an environmental program has been carried out since 2002. The risk change between 2002 and 2005 was evaluated on the basis of probabilistic data of the levels of various pollutants in soils. The results indicated that the risk of the chemicals under study did not follow a homogeneous tendency. However, the current levels of pollution do not mean a relevant source of health risks for the local population. Moreover, the neuroprobabilistic HI seems to be an adequate tool to be taken into account in risk assessment processes.     

湖南省科技人力资源现状与使用分析

对湖南科技人力资源的分析 ;分为三个基本层次进行 :一是全省专业技术人员总量 ;二是科技活动人员情况 ;三是R&D人才资源。分别从人员的分布、结构、密度、质量以及人才使用效益等方面进行分析。