daoru1

三参数威布尔分布求解，输入故障时间参数得到三叔及图像··(Solution of three parameter Weibull distribution)

很好的学习和理解OFDM的仿真代码，适合初学入门。作者为澳大利亚James Cook大学学生。(Good learning experience and understanding of the OFDM simulation code, suitable for beginners entry. The author is from Australian James Cook University.)

对构件进行优化分析时，需要将其剖分成四面体网格单元，本源码可以用来求每一个小四面体的刚度矩阵(Optimization analysis of the components need to be partitioned into tetrahedral grid cell, the source can be used to seek the stiffness matrix of each small tetrahedron)

audio and speech compression,image restoration,ezw tree using trellis codes

Matlab code of bit error rate with bpsk modulation

说明：  OFDM是将高速串行数据分成成百上千路并行数据,并分别对不同的载频进行调制,这种并行传输体制大大扩展了符号的脉冲宽度,提高了抗多径衰落的性能。同时,在传统的频分复用方法中,各子载波之间的频谱互不重叠,频谱利用率较低。而采用OFDM技术,一个OFDM符号之内包括多个经过调制的子载波的合成信号,每个子载波在频谱上相互重叠,这些频谱在整个符号周期内满足正交性,因而在接受端可以保证无失真恢复,从而大大提高频谱利用率。(OFDM divides high-speed serial data into hundreds of parallel data channels and modulates different carrier frequency separately. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. At the same time, in the traditional method of Frequency Division multiplexing, the spectrum between the sub-carriers does not overlap each other, the spectrum utilization ratio is low. In the case of OFDM, an OFDM symbol consists of multiple modulated sub-carriers, each of which overlaps in the spectrum, which is orthogonal throughout the symbol period, thus, no distortion recovery can be ensured at the receiving end, thus greatly improving the spectrum utilization ratio.)

A simple binary Ga for optimization.

To calculate gravitation field between moon and earth using charge simulation methods

generation of wideband and high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma–delta modulator chip. Via increasing the order of the one-bit bandpass sigma–delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma–delta modulator chip s production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test.

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