卫星介质深层充电中的主要物理问题

卫星介质深层充电效应是诱发地球同步轨道卫星运行故障和异常的重要因素之一，通过计算机模拟对介质深层充电的时间常数、电场特征、以及屏蔽、介质厚度和接地方式对充电所致最大电场的影响等主要物理问题进行了详细的分析，并给出了初步的防护措施．     

大型民机进近着陆段异常能量风险判据研究

根据大型民机事故统计，进近着陆阶段事故率最高，而其中大部分事故首先表现出异常能量状态，并演变成失控、重着陆、擦尾、冲出跑道等事故类型，或者呈现复飞失败。在归纳上述五类终端事故类型作为重点关注对象基础上，建立典型大型民机飞行数值仿真平台，使用随机模拟和相关性分析方法研究能量状态参数偏离导致进近着陆风险的影响规律。在此基础上，根据仿真结果给出了由关键能量参数确定的能量状态安全边界，可建立不同风场条件及可能的复飞油门下由空速-下滑角参数构成的异常能量预警判据，对于异常能量导致的进近着陆风险预警具有准确性和非保守性。研究结果可为大型民机进近着陆过程的风险预警以及相关飞行控制功能设计提供方法基础。     

基于能量优化的无人机机动轨迹生成方法

基于能量优化的无人机机动能够使无人机在不失去决定性位置优势的情况下获取相对于对手的能量优势，足够的能量优势可转换为有效的位置优势，有利于无人机在空战中随时改出当前机动并投入下一机动动作，对于无人机获取空战胜利至关重要。开展了基于能量优化的无人机机动轨迹生成方法研究，通过在无人机机动飞行包线内设计合适的机动指令，使得无人机能量性能指标最优。以上升转弯机动为例进行了机动轨迹生成的详细设计，并与常规上升转弯机动轨迹生成结果进行对比，仿真结果显示所设计的机动动作完成时间缩短了28.6%~83.8%，总能量变化减少了64.7%~70.1%，实现了无人机机动飞行的能量优化。     

某光电检测仪典型问题分析及解决

某光电检测仪器用于实时精确检测设备的动态安装方位准确度。就该仪器使用过程中出现的光能量分布不均、二次像点现象严重及测角零位漂移等几个典型问题进行分析,提出并采取了相应的解决措施,为以后解决类似的问题提供了技术途径。     

ELGR: An Energy-efficiency and Load-balanced Geographic Routing Algorithm for Lossy Mobile Ad Hoc Networks

Geographic routing is a highly active area of research in mobile ad hoc networks (MANETs) owing to its efficiency and scalability. However, the use of simple greedy forwarding decreases the packet reception rate (PRR) dramatically in unreliable wireless environments; this also depresses the network lifetime. Therefore, it is important to improve delivery performance and prolong MANET lifetime simultaneously. In this article, a novel geographic routing algorithm, named energy-efficiency and load-loalanced geographic routing (ELGR), is presented for lossy MANETs. ELGR combines energy efficiency and load balance to make routing decisions. First, a link estimation scheme for the PRR is presented that increases the network energy efficiency level. Second, a learning method is proposed to adaptively sense local network loads, allowing enhanced whole network load balance. The results of a simulation show that ELGR performs better than several other geographic routing algorithms; in particular it extends network lifetime by about 20%, with a higher delivery ratio.     

Role of scalar fields in cosmological models

Recent astronomical observations of supernovae and cosmic microwave background indicate that the universe is accelerating. Scalar–tensor theories of gravity give rise to suitable cosmological models where a late-time accelerated expansion is naturally realized. In an alternative proposal the cosmic acceleration is generated by means of a scalar field (quintessence), in a way similar to the early-time inflation. In this paper, we consider two classes of cosmological models with scalar fields. The first one corresponds to the Jordan–Brans–Dicke tensor–scalar theory with a cosmological scalar and the second one contains a conformally coupled scalar field with quartic potential. In both type of models the cosmological dynamics is described and the deceleration parameter is evaluated. The values of the parameters are specified for which a late-time accelerated expansion is realized.     

Operant responding following exposure to HZE particles and its relationship to particle energy and linear energy transfer

On exploratory class missions astronauts will be exposed to a variety of heavy particles (HZE particles) which differ in terms of particle energy and particle linear energy transfer. The present experiments were designed to evaluate how these physical characteristics of different particles affect cognitive performance, specifically operant responding. Following exposure to ²⁸Si, ⁴⁸Ti, ¹²C and ¹⁶O particles at the NASA Space Radiation Laboratory rats were tested for their ability to respond appropriately to changes in reinforcement schedules using an operant task. The results showed that the effectiveness of different particles in disrupting cognitive performance, defined as the lowest dose that produced a performance decrement, varied as a function of the energy of the specific particle: for comparisons between different energies of the same particle (e.g., ⁵⁶Fe) the effectiveness of the particle was directly proportional to particle linear energy transfer, whereas for comparisons between different particles (e.g., ⁵⁶Fe and ¹⁶O) effectiveness was inversely proportional to particle linear energy transfer. The results are discussed in terms of the mechanisms that influence the effectiveness of different particles and energies and in terms of their implications for analyzing the possible risks to astronauts of decrements in cognitive performance following exposure to HZE particles on long-duration exploratory class missions.     

毛细管平面辐射空调系统节能技术

目的如何实现空调系统更好的节能环保;方法介绍地源热泵工作原理以及它在毛细管平面辐射空调系统中的应用;结果指出将地源热泵技术用在毛细管平面辐射空调系统中;结论为空调系统的节能与环保提供了新的发展方向。     

能量效率准则在导弹拦截系统评估中的应用

将能量效率物理准则引入对导弹系统的评估.系统的效率取决于总的能量资源和对能量流的控制,通过对导弹武器系统形态的描述,给出了能量效率准则在导弹拦截系统中的应用,对于导弹武器系统作战效能评估及实际应用具有参考价值.     

太阳能吸附除湿制冷的置换通风系统

根据现今空调的发展方向,介绍了一种新兴的通风方式——置换通风系统,论述了其原理及结合冷却顶板后的热舒适性条件．针对目前能源危机和生态环境恶化的状况,提出了基于太阳能吸附除湿制冷的置换通风送风系统．阐述了两者结合的节能、环保、创造热舒适环境的特性．