核事故应急大气扩散模型ARTM验证与评价

[目的]针对国内外普遍关注的核事故应急决策支持与事故后果评价的问题,围绕目前验证、评价大气扩散模型的两个主要困难。[方法]应用目前国际上应用广泛的KINCAID示踪实验数据集和MVK模型验证评价方法,验证了评价放射性核素大气扩散模型ARTM(Atmospheric Radionuclide Transport Model)。[结果]统计结果表明:ARTM的模拟结果基本上是可信赖的,3 km内的预测有低估的趋势,5 km外的预测有高估的趋势。[结论]ARTM模型总体上可以应用于核电厂事故后果评价。

Atmospheric radiative transfer simulation for at mospheric correction of remote sensing data

The radiance leaving the earth-atmosphere system which can be sensed by a satellite borne radiometer is the sum of radiation emission from the earth surface and each atmospheric level that are transmitted to the top of the atmosphere. The radiation emission from the earth surface and the radiance of each atmospheric level can be separated from the radiance at the top the atmospheric level measured by a satellite borne radiometer. However, it is very difficult to measure the atmospheric radiance, especially the synchronous measurement with the satellite. Thus some atmospheric radiative transfer models have been developed to provide many options for modeling atmospheric radiation transport, such as LOWTRAN, MODTRAN, 6S, FASCODE, LBLRTM, SHARC, and SAMM. Meanwhile, these models can support the detailed detector system design, the optimization and evaluation of satellite mission parameters, and the data processing procedures. As an example, the newly atmospheric radiative transfer models, MODTRAN will be compared with other models after the atmospheric radiative transfer is described. And the atmospheric radiative transfer simulation procedures and their applications to atmospheric transmittance, retrieval of atmospheric elements, and surface parameters, will also be presented.

基于导向插合的毛刷电接触对结构改进设计

针对现有毛刷电接触对插合过程中随机插合现象导致的插拔力和接触电阻范围过大、可控性较差的现状,提出基于导向插合的毛刷电接触结构改进方案.改进结构包括单针簇导向结构、对接端面导向结构及插针螺旋校直结构.对改进前、后的毛刷电接触对进行2mm插拔深度的插拔力试验及接触电阻试验,结果表明:基于导向插合的毛刷电接触结构改进优化了毛刷电接触对插拔力、接触电阻范围,结构改进前、后的单对毛刷接触对多次插拔力方差值分别为0.39,0.003,结构改进前、后的单对毛刷接触对多次接触电阻方差值分别为0.41,0.008.基于导向插合的毛刷电接触对结构改进设计对改善毛刷电接触性能以及其参数设计提供了参考.