高分辨率航天光学遥感器发展新思路研究

简要介绍了高分辨率航天光学遥感器的发展，重点分析了新一代更高分辨率航天光学遥感器所采用的理论基础和发展趋势，指出了传递函数补偿（MTFC）和系统优化设计是高分辨率航天光学遥感器发展的方向之一。     

FEA OF RUBBER WITH NOVEL STRAIN ENERGY FUNCTIONS

This paper presents the results of finite element analysis of rubber structures based on novel strain energy functions stemming from the representation theorem of tensorial function. The stress tensor is represented by Taylor expansion, using the representation theorem of tensorial function of a single tensorial argument for all terms in each order of the expansion. The scalar-valued coefficient functions of the theorem are represented by the integrity bases of the strain tensor and material constants to be determined by experiment. The computer implementation of the new constitutive laws has been verified by comparing the FE results with analytical solutions. A complicated structure of rubber bearing was analyzed. The FE results show good correlation with experimental data.     

河南服装产业集群的优势培育与政府作用

河南省服装产业集群属于典型的内生性产业集群，目前仍处于发展的初级阶段，集群效应尚未充分发挥，主要原因在于集群内的企业“集”而不“群”，配套设施不完善。化解这一矛盾，培育河南服装产业集群优势，离不开政府的有力推动，主要包括：（1）做好服务工作，提升集群内服装企业的竞争力。（2）培育行业协会等中间组织，打造河南服装企业整体品牌。（3）制订发展规划，引导服装产业集群发展的方向。     

Scatter factor confidence interval estimate of least square maximum entropy quantile function for small samples

Classic maximum entropy quantile function method (CMEQFM) based on the probabil-ity weighted moments (PWMs) can accurately estimate the quantile function of random variable on small samples, but inaccurately on the very small samples. To overcome this weakness, least square maximum entropy quantile function method (LSMEQFM) and that with constraint condition (LSMEQFMCC) are proposed. To improve the confidence level of quantile function estimation, scatter factor method is combined with maximum entropy method to estimate the confidence inter-val of quantile function. From the comparisons of these methods about two common probability distributions and one engineering application, it is showed that CMEQFM can estimate the quan-tile function accurately on the small samples but inaccurately on the very small samples (10 sam-ples); LSMEQFM and LSMEQFMCC can be successfully applied to the very small samples;with consideration of the constraint condition on quantile function, LSMEQFMCC is more stable and computationally accurate than LSMEQFM; scatter factor confidence interval estimation method based on LSMEQFM or LSMEQFMCC has good estimation accuracy on the confidence interval of quantile function, and that based on LSMEQFMCC is the most stable and accurate method on the very small samples (10 samples).     

非定常气动力辨识的模糊逻辑方法

提出了用内部函数和二次型隶属函数对非线性非定常气动力进行模糊逻辑建模与辨识的方法 ,分别用 F- 18和 F- 16飞机强迫振荡的实验数据建立了非线性非定常气动力模型 ,讨论了隶属函数导数的连续性对模糊逻辑模型精度的影响 ,并与已有的 Fourier模型和非线性代数模型进行了比较。结果表明 ,文中提出的建模方法能够给出更为满意的结果。     

基于三次样条插值的激光干涉图的细化研究

在利用Ｚｅｒｎｉｋｅ多项式拟合波面的方法中，干涉图的细化误差直接影响波面的拟合误差。提出了利用三次样条函数插值的方法，将干涉图的灰度值分布曲线转换成严格的光滑曲线，从而通过数值计算方法求出灰度值曲线的极大值和极小值，以达到细化的目的。     

飞轮贮能系统在未来航天器中的应用

传统蓄电池贮能系统由于其比能量小、可靠性低的固有缺陷已难以满足未来航天器的总体性能发展要求。近年来，随着高性能磁轴承、高强度轻重量的复合材料、电力电子技术等一系列关键技术的发展，使得飞轮贮能系统取代目前航天器中镍氢电池贮能系统成为可能。文中系统地阐述这一未来的航天器贮能系统，其中具体介绍了飞轮贮能系统的高比能量、长寿命、高效率等优越特性以及在航天器应用中独具的位姿控制附加功能，并对飞轮贮能系统的结构组成、多功能集成等方面作了较为详细的论述，最后介绍了目前飞轮贮能系统在航天器中应用研究的状况     

CHANGES OF THE THERMOSPHERE DENSITY IN THE SUNSHINE AND SHADE AREA OBSERVED BY "SZ-2" ATMOSPHERIC DENSITY DETECTOR

In this paper, thermosphere density data of "SZ-2" Atmospheric Density Detec tor From February to April 2001 are used to study the changes of the thermo sphere density in the sunshine and shaded area during solar and geomagnetic activity. The results show that in the sunshine area, the peak value of atmo spheric density changes as F10.7 varies; during geomagnetic activity, the peak value of atmospheric density in the shaded area increases as Ap increases, and start off with higher latitude, therefore move to lower latitude.     

高超声速钝体尾流光电特性的计算

本文提出了一个高超声速非烧蚀钝体尾流全流场的简化模型和简化的空气化学模型。该模型用于化学非平衡尾流积分电子密度与NO_2化学发光辐射等参数的计算。对于NO_2化学发光辐射既求得了整个频谱范围内的总辐射,也求得了分谱辐射强度。计算结果与弹道靶测量数据进行了比较,它们之间的一致性良好。     

湍流标度律的实验测量

实验测量了射流与圆柱尾流纵、横向的湍流速度脉动，计算了这两种方向的湍流速度结构函数的标度规律。结果表明，横向的湍流速度脉动比纵向有着更大的间歇性，这支持目前已有的一些关于均匀各向同性湍流的实验测量和数值计算的结果，而与另一些文献报道不同。此外，还对纵、横向湍流速度结构函数标度律的S-L模型进行了一些分析。