SUDHEER_fdlf

matlab的数学源程序，可做调用：二分法，用于近似求方程的根(matlab erfenfa：mainly used in rooting)

Bit Error Rate for QPSK Modulation with Rayleigh Channel

this file contains Matlab code for calculating the snr of mmse equalizer

说明：  单位脉冲，单位阶跃，正弦函数等连续信号的MATLAB表达式。(pulse units, unit step, the sine function as a continuous signal MATLAB expression.)

kalman滤波matlab程序，利用双点差分外推法取初值，并多次求平均值(kalman filter matlab procedures, the use of two-point difference extrapolation to take initial and repeated averaging)

北京大学控制类计算机辅助设计的课件及课堂实例程序(Beijing to control the type of computer-aided design software and examples of classroom procedures)

改进后的游程编码，可以继续量化编码转化为二进制数据流，针对一些较为接近的数，通过合适的阈值设定可以近似，从而大大压缩数据流(The improved run-length coding, can continue to quantify the code into binary data stream, for some of the more close to the number set by appropriate threshold can be approximated, thereby greatly compressed data stream)

基于不变矩的形态特征提取，语言是MATLAB，代码可以运行(Morphological features extraction based on moment invariants, language MATLAB, the code can run)

An effective implicit time integration scheme was proposed for the fi nite element solution of nonlinear problems in structural dynamics. Various important attributes were demonstrated. In particular, it was shown that the scheme remains stable, without the use of adjustable parameters, when the commonly used trapezoidal rule results in unstable solutions. In this paper we focus on additional important attributes of the scheme, and specifi cally on showing that the procedure can also be effective in linear analyses. We give, in comparison to other methods, the spectral radius, period elongation, and amplitude decay of the scheme and study the solution of a simple ‘model problem’ with a very fl exible and stiff response.

说明：  求解系数矩阵由16阶Hilbert方程组构成的线性方程组， 3、共轭梯度法；(Solving the linear equations consisting of 16-order Hilbert equations of coefficient matrix. 3. Conjugate gradient method;)