带双负载环形天线的集成光波导磁场探测器

针对电磁兼容测试中对磁场探测的需要,提出一种新型的集成光学磁场探测器,它的探测头是由LiNbO3光波导调制器和双负载环天线构成的。由于电磁感应和电光效应,通过探测输出光强便可得知磁场的相关信息。与传统的磁场探测器相比,它具有体积小,对被测场干扰小的特点,并且能够有效抑制电场的影响,提高了探测准确性。通过设计探测头,得到了满足探测要求的光波导磁场探测器,并对该结构进行了仿真,仿真结果与此前的分析吻合,证实了探测器的设计是合理的。     

Ultraviolet radiation in urban ecosystems with consideration of effects on human health

Excess exposure to ultraviolet radiation (UV) from the sun, particularly the ultraviolet B (UVB), is cited as a cause or contributing factor for deleterious effects on human health, including skin cancers and cataracts. Rates of skin cancer have increased greatly in recent years, and increased UVB caused by reductions in stratospheric ozone may be responsible for some of the increase in rates, though quantified estimates of the effect of the UVB changes on health have low certainty. UVB exposure also affects the function of the immune system, and the potential resulting effects on infectious diseases and immunizations are a concern. Epidemiological considerations suggest that peoples' routine exposure to UV in urban areas can be significant in adverse health effects, particularly for young children. Projected trends of ozone indicate that agreements to limit ozone-depleting substances are slowing the UVB increase, but high levels will continue and apparently impact health to the middle of the current century. Urban trees greatly reduce ultraviolet irradiance in their shade when they obscure both the sun and sky. Where trees or other structures obscure only the sun, leaving much of the sky in view, UVB irradiance will be greater than suggested by the visible shade. Since air pollutants influence the UVB above the canopy, and the overlying atmosphere is usually more polluted in urban than rural areas, additional above-canopy monitoring of UV in urban areas is needed for comparison to existing rural monitoring sites. Such monitoring would facilitate the development of computer models of urban effects on UV, which are needed for epidemiological investigations, public education, and urban planning.     

电磁场与电磁波课程教材立体化体系建设

分析了电磁场与电磁波课程教材建设背景,给出了该课程立体化教材建设指导思想,把纸质的教材、多媒体素材、多媒体课件、网络课程等信息技术作为立体化教材的核心体系,创造性地整合电磁场与电磁波课程内容与课程实施环境,改变了传统的教本教材观念,构建了新的教育模式、教育教学方法及网络环境下的学生自主学习方式,促进了学生高级思维的发展,有利于培养合格人才.     

浅议增强中心城市辐射能力及其主要途径

区域经济发展涉及相关理论很多 ,物理学上的辐射理论 ,可以用来说明中心城市辐射力与区域经济发展的关系。结合镇江实际 ,本文认为实施中心城市辐射战略 ,必须充分考虑地方优势 ,并在此基础上 ,从增强中心城市辐射力、拓宽经济腹地、构建经济网络三方面 ,探讨镇江市实施这一战略的具体途径。     

在电磁场中巧用数学之浅析

电磁场理论与数学紧密相关,在电磁场中巧用数学能使物理概念、规律和物理过程册繁就简,便于记忆和理解。抓住事物和物理过程的对称性,巧用数学解决电磁场中的类似问题,培养学生灵活运用数学处理问题的能力。     

小型变流量电磁泵的结构优化设计

本文在介绍电磁泵的结构组成的基础上,详细介绍了采用复合形法对电磁泵进行优化设计的具体步骤。     

Expert Views on Their Role as Policy Advisor: Pilot Study for the Cases of Electromagnetic Fields,Particulate Matter,and Antimicrobial Resistance

This perspective presents empirical data to demonstrate the existence of different expert views on scientific policy advice on complex environmental health issues. These views are partly research‐field specific. According to scientific literature, experts differ in the way they provide policy advice on complex issues such as electromagnetic fields (EMF), particulate matter (PM), and antimicrobial resistance (AMR). Where some experts feel their primary task is to carry out fundamental research, others actively engage in the policy dialogue. Although the literature provides ideas about expert roles, there exists little empirical underpinning. Our aim is to gather empirical evidence about expert roles. The results of an international study indicated that experts on EMF, PM, and AMR differ in the way they view their role in the policy dialogue. For example, experts differed in their views on the need for precaution and their motivation to initiate stakeholder cooperation. Besides, most experts thought that their views on the risks of EMF/PM/AMR did not differ from those of colleagues. Great dissensus was found in views on the best ways of managing risks and uncertainties. In conclusion, the theoretical ideal–typical roles from the literature can be identified to a certain extent.     

东亚国际秩序的历史遗产

东亚国际秩序是以中国为核心的,存续时间最长,调控、整合地域广的三大国际秩序之一。它有其独特的运行机制和道义魅力。实现了宗属关系与家族亲和性、结盟与互市、地缘调控与文化吸纳全方位的整合,构造了一元为主导、多元互动的国际秩序。在现代,对于如何处理相邻的大国与小国关系,如何构建未来的东亚国际合作模式,仍能给我们以启示,提供历史根据。     

电磁场中量子体系的规范不变性

本文讨论了处于电磁场中的体系的量子力学形式。结果表明,虽然对体系的描述涉及到电磁势,但体系的物理性质只依赖于电场和磁场的强度;如果改变描述电磁场的势,则体系的物理性质仍保持不变.     

The Health Impact of Major Nuclear Accidents: The Case Of Greece

An assessment of the radiological consequences that would result for the population of Greece from postulated major nuclear accidents in the Kozloduy nuclear power station in Bulgaria is performed. Kozloduy lies at a distance of 225 km from the northern borders of Greece and contains six reactors, all of the Russian WWER type. The postulated accidents that are classified as level 7 accidents on the International Nuclear Event Scale, involve significant releases of radioactive materials into the environment, and widespread health and environmental effects. The analysis is performed by the MACCS code. The estimated consequences are compared to the corresponding actual impact of the Chernobyl accident in Greece. The results of the analysis indicate that, under the conservative assumptions adopted, the radiological consequences of the most severe accidents considered would be about 1.5 orders of magnitude larger than the actual radiological consequences of the Chernobyl accident.