关于不同海拔高度宇宙射线吸收剂量率测量方法的探讨

本文报道了使用FT—620型照射量率仪和高压电离室对四川省不同海拔高度宇宙射线电离成份所致空气吸收剂量率的测量结果。测量水面是四川省的三岔湖(海拨461米);邛海(海拔1510米);泸沽湖(海拔2690米)。根据测量结果经过换算,得出了在一定的地理纬度下,宇宙射线电离成份所致空气吸收剂量率随海拔高度的变化曲线。由此可评价不同海拨高度地区,宇宙射线电离成份所致居民受照剂量和计算陆地r辐射剂量率     

济南市电磁辐射环境污染状况评价与分析

本文通过对济南市电磁辐射污染源、电磁辐射环境的调查、评价与分析 ,基本查清电磁辐射污染源的污染状况、布局以及对大环境的影响情况 ,初步得出济南市的电磁辐射环境基本是清洁的结论。     

废水中可溶性硫化物的形态分析

运用毛细管区带电泳间接紫外光度法，成功地分离了水中几何可溶性硫化物，并用于废水分析取得满意效果。     

Physiological Rearrangements in the Progeny of White Rats in the Zone of the Chernobyl Accident

Studies on six generations of white rats kept at the experimental station in Chernobyl showed that the dynamics of hormonal rearrangements and endocrine responses evoked by additional stress (hypokinesia) were generation- and sex-dependent. The male rats of the first five generations were characterized by hypercorticoidism, early involutional shifts, and decreased reactivity in response to hypokinesia. By the sixth and seventh generations, the hormonal profiles shifted toward an increase in the background level of sex hormones and their role in the response to hypokinesia. In female rats, the hormonal indices and reactivity changed less significantly.     

城市电磁波辐射污染监测及防护

电磁波辐射不仅对通信、无线电管理、电器设备的正常工作有许多干扰,而且对生物体也有严重的影响。为了更有效地避免因射频、微波等高频电磁场对城市居民身心健康的危害,进行城市电磁波辐射水平的监测与评价,并为此采取相应的防护措施是十分必要的。在1990年,用我国研制的电磁环境辐射监测仪对厦门、漳州两城市的电磁波辐射污染进行了测试和评价,为我国各大中城市进行电磁波辐射污染测试和评估提供了切实可行的方法。     

A simple method for partitioning total solar radiation into diffuse/direct components in the United States

Solar radiation is a major sustainable and clean energy resource, and use of solar radiation is expected to increase. The utilization efficiency of solar energy varies with the relative proportions of the direct and diffuse components that compose total solar radiation and with the slope and aspect of the irradiated surface. The purpose of this paper is to develop a simple method for estimating diffuse and direct solar radiation at sites with observation of only total solar radiation. An existing model for estimating diffuse radiation, i.e., a linear relationship between the diffuse fraction (the ratio of diffuse radiation to total solar radiation) and the clearness index (the ratio of total solar radiation to extraterrestrial radiation), is applied to 7 sites across the continental United States with observations of diffuse and total radiation. The linear model shows good monthly performance. The model parameters (slope and interception) show a strong seasonal pattern that exhibits small variation across the 7 sites; therefore, the average values of the two monthly parameters may be used for estimating diffuse radiation for other locations with observations of total radiation.     

Prediction of diffuse solar radiation using satellite data

In the project of the solar systems, the values of the solar radiation of a region must be known. The global solar radiation measurements are performed by the Turkish Meteorological Service in Turkey, while the diffuse solar radiation measurements are unavailable. In this study, some new models for predicting the monthly average daily diffuse solar radiation on a horizontal surface for Erzincan, Turkey are developed using satellite data. The evaluation of the models is carried out with the statistical analysis methods of mean bias error (MBE), root mean square error (RMSE) and correlation coefficient (r). The results are proved that the correlation equations obtained in here can be used to forecast diffuse solar radiation reasonably well.     

花岗石辐射风险评价方法研究

花岗石是重要的建筑材料,但大部分地区的花岗石辐射比较严重,并且很难准确直观地评估出危害风险的高低。通过对花岗石辐射风险评价方法的探讨,采用环境风险评估作为切入点,以区域风险的高低作为评估标准,判断任何个体进入这个区域是否为高风险区域,将环境的辐射程度与人员暴露在危险环境中的频繁程度联系在一起,形成了一套简单易行的半定量评价方法,并作实证分析,为政府的管理或居民的家庭装饰选择提供了科学的依据。     

电子辐照Kapton/Al薄膜力学性能退化规律与机理研究

目的为航天器用Kapton/Al薄膜材料的选用提供数据支撑和高性能Kapton/Al薄膜材料的研制提供理论支持。方法用综合辐照试验装置对Kapton/Al薄膜材料进行电子辐照,用拉力试验机对Kapton/Al薄膜材料开展力学性能拉伸试验,用XPS对其成分和微观结构进行测试分析。结果Kapton/Al薄膜材料的抗拉强度和断裂伸长率随着拉伸速度的增加而降低,随着电子辐照注量的增加呈指数减小,在电子辐照下,薄膜材料分子键发生断裂和交联,C—CO和C—N键断裂发生脱氧和脱氮反应,C—H基团相对含量增大。结论电子辐照将造成Kapton/Al薄膜材料力学性能降低,薄膜材料分子价健的断裂和交联是薄膜力学性能降低的主要原因。