qh737

Computes the exceedence correlations discussed in Ang and Chen (2001)

求解Lambert问题。 输入：轨道上两个点的位矢R1、R2，以及从R1到R2所用的时间t(缺点是脉冲太大)。 输出：质点在R1端点的速度V1，质点在R2端点的速度V2. 此函数用于：在给定轨道上两个点的位矢R1、R2，以及从R1到R2所用的时间t。求解V1、V2。再调用前面的函数就可以确定轨道根数，及任意时刻质点的状态。(To solve the Lambert problem. Input: track two-point position vector R1, R2, and R1 to R2 used in the time t (The disadvantage is that the pulse is too large). Output: particle R1 endpoint speed V1, the particle in the R2 endpoint speed V2. This function is used: two points in a given orbit position vector R1, R2, and from R1 to R2 with the time t. Solve the V1 and V2. And then call the previous function can determine the orbital elements, and any moment of the particle' s state.)

Matlab code for speech recognition

一个简单的OFDM程序，有IFFT/FFT，QPSK调制解调，加入了高斯噪声，加入循环前缀。并且每行程序都有的详细注释，简单易懂。扩展性比较强，可以改写成自己的代码。(A simple OFDM procedures, there are IFFT/FFT, QPSK modulation and demodulation, joined the Gauss noise, adding a cyclic prefix. And each line of the program are detailed notes, easy to understand. Expansion is relatively strong, can be rewritten into their own code.)

说明：  主要用于多信号的接收，实现全概率信号的截获和接收(Is mainly used for multi-signal receiver, the probability of signal interception for full and receive)

本书基于MATLAB 5.2版，提供了使用MATLAB的实践性指导。MATLAB已成为适合多学科、多种工作平台的功能强大、界面友好、语言自然并且开放性强的大型优秀应用软件，同时也已成为国内外高等院校高等数学、数值分析、数字信号处理、自动控制理论以及工程应用等课程的基本教学工具。本书按逻辑编排，自始至终用实例描述；内容完整且每章相对独立；是一本简明的MATLAB参考书，既适用于初学者，也适用于高级MATLAB用户。对MATLAB与FORTRAN、C等语言结合的描述更是所有MATLAB书籍中少有的一大特色。 本书适合作为理工科高等院校研究生、本科生教学用书，也可作为广大科研工程技术人员的自学用书。

无刷直流电机的内模控制，电机额定转速3000r/min，内模控制参数r 0.01，控制效果良好，转速曲线平滑(The internal model control of the brushless DC motor, the motor rated speed 3000r/min, the internal model control parameter r 0.01, the control effect is good, the speed curve is smooth.)

运用迭代法计算非线性方程组，并且编制程序对非线性方程组求解(Using the iterative method of nonlinear equations, and programming for solving nonlinear equations)

SIFT MATLAB SOURCE CODE

文章简要分析了中点钳位式(NPC)三电平逆变器的基本原理,提出了一种平衡中点电位的新方法,实现了全数字化控制系统,最后通过仿真验证了该方案的正确性.(This paper briefly analyzes the basic principles of the midpoint of the three-level clamped (NPC) inverter, proposed a new method for balancing the midpoint potential, to achieve a fully digital control system, and finally through the correct simulation of the program sex.)