| 1. | Performance evaluation of laser based spherical coordinate measurement systems
基于球形坐标测量系统的激光器性能评价 |
| 2. | Calibration scheme under spherical coordinates for magnetic tracker used in vr system
虚拟现实系统中电磁跟踪器的球坐标校正方法 |
| 3. | When a solid regionin three - space is symmetric with respect to a point , the evaluation of triple integrals over is often facilitated by using spherical coordinates
当空间立体区域关于某个点对称时,计算上的三重积分通常使用球坐标比较容易。 |
| 4. | Considering the missile - target intercepting in reality is always under the three dimensional environment , so the equation of missile - target relative motion is eastablished in three dimensional spherical coordinates
摘要考虑到真实的导弹目标拦截都是在三维环境下进行的，因此在三维球坐标系下建立了导弹目标的相对运动学方程。 |
| 5. | The dynamic model in the spherical coordinate is presented for bearing - only target positioning . however , such model has unknown covariance of process noise , which is related to the range between the target and the passive sensor
简要概述被动定向跟踪，推导了球坐标系下的匀速运动目标的定向跟踪模型；状态建模的不完备性引起了模型噪声方差阵带有未知径距参数，因而需要解决参数在线辨识问题。 |
| 6. | Besides , successfully calculating the electromagnetic four - potential in the spacetime of charged black hole expressed by the generali zed spherical coordinate and furtherly solving the h - j equation of such spacetime make it possible to get the exact description of the energy extent of nonthermal radiation particle and to study the characteristics of such black hole ' s nonthermal radiation
另外，本文还求出了一类用扁椭球坐标表示的荷电黑洞时空中的电磁四维势矢量，从而成功地求解了此类弯曲时空中的hh方程，得到了这种非热辐射粒子能量范围的精确表达式，从而对这类黑洞的非热辐射特征进行了研究。 |
| 7. | This paper is composed of two parts including 5 chapters . in the first part ( including chapter 2 ^ 3 ) , this paper explains an improved geometry - model method to eliminating eclipse shadow , using satellite imaging theory and projection theory to convert plane rectangular coordinates into rectangular spherical coordinates . otherwise , through studying eclipse ' s shape and size , this paper uses a math - function - model to eliminating eclipse shadow
本文共有五章，主要内容分为两部分；第一部分包括第二、三章的内容，利用可见光云图成像原理以及点的投影法，将平面云图投影到三维直角坐标的球面上，对用于云图阴影订正的原几何模型法加以改进，得到改进的几何模型法，并进行日食阴影订正实验；本文还利用数学函数模型法，通过研究月球在地球表面投射阴影的形状及其受影响程度，从另一方面进行可见光云图日食阴影的订正实验研究。 |
| 8. | Firstly , in spherical coordinate system , the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived , using reciprocity theorem and transforming relations between special functions . then , selecting appropriate coordinate system , using superposition principle , the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained . finally , by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1 , the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located
首先利用特殊函数间的转化关系和互易定理推导得到了无限大导体空间中球坐标下时谐电流元电磁场的二阶矢量位形式：然后利用叠加原理，选择合适坐标系，求解了导体球中时谐电流元的修正磁矢量位边值问题，得到了问题的解析解；最后依据不同坐标系下电磁场解的转化原理，借助勒让德多项式和n次1阶球谐函数的加法公式，将坐标系特殊安放时的电磁场解析解变换到坐标系一般安放时的解析解，给出了球内电场和球外磁场的并矢格林函数。 |
| 9. | Based on this theory , a conception about flight path dynamic prediction and arithmetic which named adaptive a - p filtering with faking acceleration revising in the spherical coordinate is then presented in this paper , and write code on the real - time operating system which called vxworks . many simulations proved the value of adaptive a - p filtering . the application of flight path dynamic prediction in improvement of multitarget tracking performances is also studied and an application example is given
在此基础上，结合工程实际，通过引入航迹动态预测时间概念，笔者提出航迹动态预测方法和球坐标系下带伪加速度修正的-自适应滤波算法，并且在vxworks操作系统上编程实现；通过大量的仿真工作，验证了带伪加速度修正的-自适应滤波算法的应用价值；同时，还对应用航迹动态预测的多目标跟踪性能进行了深入的讨论，得出了航迹动态预测方法在多目标跟踪中的实践意义。 |
| 10. | The glint suppression using high resolution range profile under conical angle measurement is studied , the angle information in signal components of scatters are extracted and averaged to suppress the glint . nonlinear kalman filtering methods under near spherical coordinate are analyzed and used to get more accurate tracking
研究了圆锥扫描测角体制下基于距离高分辨的角闪烁抑制方法，利用距离维高分辨像，提取强散射中心反射信号分量，在此基础上估计出各个强散射中心的角度测量值，采用平均方法减少角闪烁对测角的影响。 |
