ID 原文 译文
13604 以上结论增加了对北极空间碎片分布特征的认识, 对我国的空间碎片建模具有重要意义。 The above results are helpful to understand the characteristics of space debris distribution in the Arctic and also important for the modeling and forecast of space debris.
13605 电离层人工变态会影响短波通信及卫星通信, 对空间物理研究具有重要意义。 Artificial ionospheric modification can disturb the short-wave communications and satellite communications.
13606 基于中性气体扩散方程、离子化学反应方程及等离子体扩散方程, 模拟了三种典型化学物质 (氢气H2、二氧化碳CO2和三氟溴甲烷CF3Br) 经点源和多源释放后导致的电离层三维扰动变化, 并利用自适应变步长的三维数字射线追踪技术讨论了化学释放变态电离层对不同频率短波传播的影响。 In this paper, on the basis of neutral gas diffusion equation, chemical reaction equation and plasma diffusion equation, the ionospheric disturbances caused by three representative chemicals (H2, CO2, CF3Br) are simulated with a 3D dynamics model. The short wave propagation in disturbed ionosphere is also investigated with a 3D digital ray tracing method.
13607 结果表明：点源释放时产生的“空洞”在水平面上沿磁场线方向的轴长略大于其垂直方向；在释放量及释放高度相同的前提下, H2扩散最快, CF3Br扩散最慢, 但就t=100s时电子密度最大相对变化率而言, CF3Br最大, CO2次之, H2最小。 The results show that single-point releases generate ellipse-like ionospheric holes, and a slightly larger scale is found along magnetic field than vertical direction in the hole's horizontal plane.With the same amount of substance and same release altitude, H2 diffuses fastest and CF3Br diffuses slowest, but as for the maximum relative change rate of electron density at t=100 s, CF3 Br corresponds to the highest rate while H2 corresponds to the lowest.
13608 CF3Br释放形成的“空洞”垂直范围最小, 开始发生穿透现象所需的短波频率最高。 The release of CF3Br results in the smallest vertical range of ionospheric hole, so the ray firstly penetrating the hole is at a higher frequency than that of CO2 and CF3Br.
13609 H2扰动下“空洞”边界的电子密度梯度最小, 射线聚焦点明显偏高, 聚焦效应最弱;多源释放产生类抛物线管状的电离层“空洞”结构, 射线的传播路径更加多样, 此时仍有聚焦效应出现, 且聚焦点随射线频率增加而升高, 聚焦效应减弱。 The release of H2 results in the smallest electron density gradient at the hole's boundary among three chemicals, so the altitude of ray focus point is always higher than that of CO2 and CF3Br, indicating the weakest focus effect.
13610 为研究瞬态电磁脉冲故障注入对集成电路芯片的影响及其故障机理, 基于Marx发生器原理和MOSFET开关特性, 研制了一个全固态纳秒级电磁脉冲发生器。 To study the influence and mechanism of transient electromagnetic pulse (EMP) fault injection on integrated circuits, a total-solid-state nanosecond EMP generator based on the Marx circuit and MOSFET switching characteristics is developed.
13611 基于提出的HSPICE软件仿真等效模型, 分析了发生器电路主要寄生参数对MOSFET开关特性的影响, 并建立了相应的数学模型, 为电磁脉冲发生器的研制提供了设计指南。 Based on the proposed HSPICE simulation equivalent model, the impacts of the main parasitic parameters of the generator circuit on the MOSFET switching characteristics are analyzed. A mathematical model is then established, which provides design guidance for the development of EMP generator.
13612 实验结果表明：建立的数学模型精度为96.7%。 Experimental results show that the accuracy of the established mathematical model is 96.7%.
13613 基于二级Marx电路的电磁脉冲发生器可产生幅值可调 (0100V) 、脉宽可变 (2002 070ns) 、最快下降沿为32ns的脉冲信号。 The EMP generator based on two-stage Marx circuit has the capability of producing pulse signal with adjustable amplitude from 0 to 100 V, pulse width from 200 ns to 2 070 ns and the fastest falling edge of 32 ns.