世界贸易组织与航空产品包装

论述了我国加入世界贸易组织后，如何搞好航空产品的包装和包装标准化工作，以提高航空工业军品和民品在国际市场的竞争能力。     

污水处理装置在冶金行业中的应用

对污水处理装置的技术参数、技术要求及设计方案的选择、工作原理做了进一步的阐述。对工业循环冷却水的处理有实际指导意义。     

Real-time translational control of a MEMS comb resonator

Closed-loop control has been successfully applied to a microelectromechanical systems (MEMS) lateral comb resonator device in real-time to perform impulse disturbance damping and sinusoidal position control, enabled by the use of a through-wafer optical microprobe to obtain position feedback. This result leverages the application of lifetime, in-situ control of MEMS in order to provide quality assurance of microsystems in safety critical applications. A position feedback signal produced by a through-wafer optical microprobe has been used for comb resonator system model identification by two independent methods to accurately determine the effective mass, damping, and spring constant values of the device. After accurate determination of system parameters, closed-loop impulse disturbance damping and proportional-integral-differential (PID) translational control were applied. Closed-loop control results presented indicate controllability of such microstructures and response times on the order of the natural frequency of the device.     

高速低压差分信号（LVDS）器件应用设计方法研究

随着高速LVDS器件得到广泛应用，在高速信号使用LVDS传输时，信号传输线路问题、信号传输波形的最佳化成为非常重要的课题之一。由于印制电路板的布局布线直接影响信号传输质量，因此利用仿真对印制板分析成为设计上不可缺少的手段。有鉴于此，文章深入探讨了高速电路的设计，总结出设计技巧。     

Parametric Rao Test for Multichannel Adaptive Signal Detection

The parametric Rao test for a multichannel adaptive signal detection problem is derived by modeling the disturbance signal as a multichannel autoregressive (AR) process. Interestingly, the parametric Rao test takes a form identical to that of the recently introduced parametric adaptive matched filter (PAMF) detector for space-time adaptive processing (STAP) in airborne surveillance radar systems and other similar applications. The equivalence offers new insights into the performance and implementation of the PAMF detector. Specifically, the Rao/PAMF detector is asymptotically (for large samples) a parametric generalized likelihood ratio test (GLRT), due to an asymptotic equivalence between the Rao test and the GLRT. The asymptotic distribution of the Rao test statistic is obtained in closed form, which follows an exponential distribution under the null hypothesis H ₀ and, respectively, a noncentral Chi-squared distribution with two degrees of freedom under the alternative hypothesis H ₁. The noncentrality parameter of the noncentral Chi-squared distribution is determined by the output signal-to-interference-plus-noise ratio (SINR) of a temporal whitening filter. Since the asymptotic distribution under H ₀ is independent of the unknown parameters, the Rao/PAMF asymptotically achieves constant false alarm rate (CFAR). Numerical results show that these results are accurate in predicting the performance of the parametric Rao/PAMF detector even with moderate data support.     

Summary of CNCOSPAR Activities 2002-2004

1 In Brief In this report, we summarize the major activities of CNCOSPAR from the year 2002to 2004. During this period, many things happened such as Beijing won the 2006COSPAR scientific assembly, the first Chinese Committee of COSPAR handed over its responsibility to the second committee, etc. During this period, the space science activities developed also very fast. China has sent its first scientific satellite, the first satellite TC-1 of the Double Star Program, into space. China also has a major break through in the manned space flight by a very successful mission of Shenzhou manned space flight. On board of this spacecraft, is the first Chinese astronaut Mr. Liwei Yang. This made China the third country in the world who has the ability that the launch manned space missions independently.     

一类拟线性椭圆型方程分歧点的存在性

本文讨论了下面问题的分歧点的存在性：－ｐｘｉ〔（１＋｜ｕ｜２）ｐ２－１ｕｘｉ〕＝μｕ＋ｆ（ｘ，ｕ），ｘ∈ＲＮｕ（ｘ）→０，当｜ｘ｜→＋∞时，ｕ０，μ∈Ｒ１，Ｎ＞ｐ≥２｛证明了μ＝０是上述问题的分歧点。     

最坏风模型及对飞机突防航迹跟踪的影响

针对一类非线性动力学系统,本文推导出二次型性能指标下的微分对策解,由此得到一组含有非线性因素的最环风模型,这一模型特别适用于研究作空间机动飞行的飞机受外界环境扰动的灵敏性问题。最后考察了这一变化风场对飞机突防航迹非线性解耦跟踪的影响。     

一种可伸缩空间机械臂及其应用分析

介绍一种能够完成多关节型空间机械臂所能承担的大部分空间任务 ,而且应用更简便的可伸缩空间机械臂 ,对其空间应用做出了一些设想 ,简单讨论了其应用的一些相关问题 ,肯定了其可行性和实用性。     

减小固体火箭外壳板滚弯直线度误差的研究

如何减小固体火箭外壳板滚弯直线度误差是目前火箭生产工艺中的难题,在对最不利实际工况下三轴辊弯板机中心辊进给量沿自身轴线分布规律作系统的分析、计算及研究的基础上,推导出一项箭壳板滚弯直线度误差不等式,并针对此项不等式各参数变化规律,提出几项减小箭壳板滚弯直线度误差的行之有效的措施,可供火箭外壳设计及生产工艺人员参考。