纤光制导光缆的缠放及其损失

纤光制导导弹发展中一个特殊问题，就是光缆的缠放及由此而引起的光能量的损失，光缆顺从地放出与光缆技术要求，线轴设计和光缆缠绕工艺及参数控制十分有关，光缆在缠放过程中所处弯曲状态造成的宏弯和微弯附加损失，以及层间压力对弯曲损失的影响等，本文将作简要分析与讨论。     

水蒸汽性质曲线拟合的优化方法

本文用最优化方法以计算值与表值之差等量加权和最小为目标优化公式中的多项式系数，得到的适用范围和计算精度均优于原公式的水蒸汽性质计算方程。     

组织光学中的Monte Carlo方法

介绍了Monte Carlo方法产生的背景、基本思想及其在组织光学应用中的重要意义，评述了其在组织光学应用中的研究进展，对其发展趋势作了展望。     

The Influence of Medium on Low-Voltage Circuit Breaker Arcs

This paper mainly focuses on the influence of three kinds of media： air, air-10%PA （Nylon） and air-10% POM （polyoxymethylene） on low-voltage circuit breaker arcs. A threedimensional （3-D） model of arc motioa under the effect of external magnetic field is built based on magnetohydrodynamics （MHD） equations. By adopting the commercial computational fluid dynamics （CFD） package based on the control-volume method, the above MHD equations are solved. For the media of air-10%PA and air-10%POM, the distributions of stationary temperature and electrical potential and the transient motion processes are compared with those of air arc. The research shows that both air-10%PA and air -10% POM can cool the arc plasma and the former is more effective. Both of them can increase the stationary voltage as well. Moreover, the presence of the two mixtures can accelerate the arc motion toward the quenching area and ensures the arc quenched in time.