基于有限元的线法技术的一种三维半解析算法

在平面有限元线法的基础上，结合有限层法的分层离散，层内解析的思想，在三维空间中构造出了系统的半解析算法。数值结果表明该方法切实可行，具有较高的精度，且在网络分划，数据输入等方面能大大简化工作量。     

基于三维空间的无人机规避攻击导引设计

针对三维空间中无人机受到纯比例导引空空导弹攻击而采取机动规避的过程, 建立无人机与空空导弹的相对追逃运动模型。基于人工势场基本理论, 对空空导弹相对无人机的势力场进行分析, 构建指向无人机的势力场增加最快方向的态势模型, 利用反比例导引项结合反跟踪势场力项构成一种新的复合规避导引律, 分别对迎头攻击和尾追攻击时无人机规避攻击进行仿真。仿真结果表明, 该导引律能有效完成规避任务。     

三维空间目标识别的多滤波器技术

本文基于三维空间目标不变性识别的原理,采用多滤波器并行处理和综合判断的光学相关检测技术,对三维空间目标进行识别。实验结果表明仅由４个滤波器构成的滤波器组已能识别出三维目标在水平３６０°、高低角±３０°范围内不同视角的二维平面图像。     

Uniform Diffraction Efficiency for Three-Dimensional Dynamic-Static Speckle Multiplexing Holographic Storage

We analyse and optimize the exposure-schedule of three-dimensional dynamic-static speckle multiplexing （DSSM） schemes. The uniform diffraction efficiency for the DSSM volume holographic storage system is realized in an ion and indium doped LiNbO3 crystal An overlap-factor matrix is introduced into the system to compensate for the complex erasure effects caused by the static speckle multiplexing. We obtain 100 holograms demonstrating the exposure-schedule theory. The uniformity of the diffraction efficiency is improved by about 8%.     

一种新的三维空间用户自定位及其实时算法

提供移动用户三维空间准确定位业务是未来无线通信发展的必然趋势.基于雷达双测距原理,本文首先给出了一种实现移动用户三维空间定位的无线电法,然后在实时性基础上详细讨论了实现三维定位的快速算法.仿真表明,三维空间定位算法满足实时性和高精度的要求,其中单点定位仿真计算仅需0.13秒,迭代误差数量级小于10-4.     

General Solution and Fractal Localized Structures for the （2＋1）—Dimensional Generalized Ablowitz—Kaup—Newell—Segur System

Using the standard truncated Painleve expansions,we derive a quite general solution of the (2 1)-dimensional generalized Ablowitz-Kaup-Newell-Segur system.Except for the usual localized solutions,such as dromions,lumps,ring soliton solutions,etc,some special localized excitations with fractal behaviour i.e.the fractal dromion and fractal lump excitations,are obtained by some types of lower-dimensional fractal patterns.     

光子路线不一定是三维空间的短程线

本文从广义相对论出发，论证了光子路线和三维空间短程线的原则区别．具体计算了中心对称引力场中三维空间的短程线，并与已知的光子路线进行了比较．     

Painleve properties and exact solutions for the high-dimensional Schwartz Boussinesq equation

The usual （1＋1）-dimensional Schwartz Boussinesq equation is extended to the （1＋1）-dimensional space-time symmetric form and the general （n＋1）-dimensional space-time symmetric form. These extensions are Painleve integrable in the sense that they possess the Painleve property. The single soliton solutions and the periodic travelling wave solutions for arbitrary dimensional space-time symmetric form are obtained by the Painleve-Backlund transformation.