基于小波神经网络的双足步行机器人步态规划控制器

对于传统的神经网络中神经元模型在结构和信息存储能力上存在的不足，本文提出了一种基于广义小波其函数网络的神经元集聚模型，这种小波神经网络不仅收敛速度快，非线性逼近能力更好，而且具有内部结构变尺度、自适应调整和广义信息存储等智能化特点，更符合生物原型的实际情况。静态学习和准动态学习仿真实验证明这种神经网络结构的有效性。     

一种实用的基于GPS的飞行试验记录仪

以某小型飞行器靶场试验为背景 ,对弹载接收机GPS外测系统进行简化 ,设计并实现了一种实用的基于GPS的飞行试验记录仪。该记录仪按照实时记录、事后分析的方式工作 ,经过多次打靶试验 ,达到了以非常低的成本获得飞行试验数据的目的     

机载目标状态估计器

研究基于空载雷达测量下的机动目标状态估计器的设计问题。通过建立直角坐标状态方程和选取一种伪测量量，并采用测量模型线性化的方法，建立起了估计器的基本结构，在此基础上增加距离通道的冗余滤波，进一步提高距离通道的估计精度，最后将估计器联入整个综合火力／飞行控制系统中，进行了Ｍｏｎｔｅ Ｃａｒｌｏ仿真，仿真结果表明，设计的目标状态估计器具有很好的跟踪估计性能。     

E1784K基因变异与钠离子通道病建模与仿真(英文)

临床报道发现SCN5A上的一个位点突变E1784K基因变异会导致同时出现长QT间期III型综合征和Brugada综合征的特征。E1784K基因变异引起钠离子通道功能改变,但无法确定钠离子通道功能的改变是否能够解释LQT3和BrS交叠现象。为分析该问题,建立了详细的计算模型,从动作电位、有效不应期和伪心电图三方面进行仿真。仿真结果表明E1784K基因突变导致钠离子通道改变不能直接解释LQT3和BrS心电图特征交叠现象,而间接引起的ITo或者ICaL重构可以解释该现象。     

Numerical studies of static aeroelastic effects on grid fin aerodynamic performances

The grid fin is an unconventional control surface used on missiles and rockets. Although aerodynamics of grid fin has been studied by many researchers, few considers the aeroelastic effects.In this paper, the static aeroelastic simulations are performed by the coupled viscous computational fluid dynamics with structural flexibility method in transonic and supersonic regimes. The developed coupling strategy including fluid–structure interpolation and volume mesh motion schemes is based on radial basis functions. Results are presented for a vertical and a horizontal grid fin mounted on a body. Horizontal fin results show that the deformed fin is swept backward and the axial force is increased. The deformations also induce the movement of center of pressure, causing the reduction and reversal in hinge moment for the transonic flow and the supersonic flow,respectively. For the vertical fin, the local effective incidences are increased due to the deformations so that the deformed normal force is greater than the original one. At high angles of attack, both the deformed and original normal forces experience a sudden reduction due to the interference of leeward separated vortices on the fin. Additionally, the increment in axial force is shown to correlate strongly with the increment in the square of normal force.     

Nonequilibrium recombination after a curved shock wave

The effect of nonequilibrium recombination after a curved two-dimensional shock wave in a hypervelocity dissociating flow of an inviscid Lighthill–Freeman gas is considered. An analytical solution is obtained with the effective shock values derived by Hornung (1976) [5] and the assumption that the flow is ‘quasi-frozen’ after a thin dissociating layer near the shock. The solution gives the expression of dissociation fraction as a function of temperature on a streamline. A rule of thumb can then be provided to check the validity of binary scaling for experimental conditions and a tool to determine the limiting streamline that delineates the validity zone of binary scaling. The effects on the nonequilibrium chemical reaction of the large difference in free stream temperature between free-piston shock tunnel and equivalent flight conditions are discussed. Numerical examples are presented and the results are compared with solutions obtained with two-dimensional Euler equations using the code of Candler (1988) [10].     

Soil moisture mapping over the Chinese Loess Plateau using ENVISAT/ASAR data

In this paper, we used the available algorithm for soil moisture estimation over LOPEX05 (the Loess Plateau land surface process Experiment (2005)) area. The available algorithm used ENVISAT/ASAR AP mode VV polarization observational data at a low incidence angle and ground measured soil moistures. The ground measurements were performed in the summer of the 2005 during the LOPEX05 field campaign. The validated results indicate that an average difference between the soil moistures estimated from the microwave remote sensing and ground measurements is less than 0.02 cm³/cm³, with a RMS error of 2.0%, and a maximum less than 0.04 cm³/cm³. The algorithm was applied to the surface soil moisture mapping later. The results show that this algorithm is suitable for monitoring soil moisture information of the agricultural fields over the Chinese Loess Plateau, when ground land cover situation and the resolution of imagery data are taken into account. However, we also find that there are large differences over the steep slope region, the edge of mesa. The results are not acceptable for surface soil moisture estimation in these regions. Thus, the surface soil moisture retrieval in the steep slope region of the Loess Plateau need to be further investigated in the future.     

高校教师职业生涯规划管理的思考

高校教师是知识型员工，具有很强的成就欲望和明确的价值观，对其进行职业生涯规划与管理要给其充分的民主权和参与管理权，并根据教师在不同职业生涯阶段的不同特点进行职业生涯的规划。高校教师职业生涯规划有利于高校合理配置人力资源，提高高校的向心力和凝聚力，实现高层次激励的作用。高校可通过建立教师职业生涯规划与管理平台、公平的教师绩效评估体系、科学的薪酬管理体系、系统化的培训体系、有效的激励机制，促成高校和教师的共同发展，实现共同的目标。     

SDH体制应用前景分析

传统的由PDH传输体制组建的传输网,对传统的点到点通信有较好的适应性.而随着数字通信的迅速发展,PDH的传输体制已经愈来愈成为现代通信网的瓶颈,制约了传输网向更高的速率发展.SDH就是适应这种新的需要而出现的传输体系,论文通过对SDH特点的分析,认为其具有广阔的商用前景.     

邻近空间无线通信连接技术的探讨

文章研究了CCSDSPSLP（空间数据系统咨询委员会邻近空间链路协议）的连接技术,从连接帧格式、指令内容、状态逻辑、参数配置等方面进行了深入分析,重点研究了物理层、编码与同步子层的底层功能及接口细节,并从实现的角度讨论了三种优化连接的方法流程,为基于PSLP的设备研制做出了具备应用价值的技术探索.