FIRST_temp

利用matlab编写的微分方程组的龙格库塔解法(Runge-Kutta solution of differential equations using Matlab prepared )

this code helps us to compress a text using huffman algorithm

通过并行压缩进行二维信号压缩，提出了一种利用并行压缩传感技术对二维信号进行压缩的新方案。根据这个原理，译码器的重新构造可以并行进行。通过对二维信号进行某些排列，可以确保所有列具有大致相同的密度级别，并且可以使用相同的测量矩阵进行采样。这样可以避免二维信号的矢量化，从而大大减小测量矩阵的尺寸。我们证明，如果排列良好，重建均方误差的上限会更紧。为了说明这一方案，我们将其应用于视频压缩并使用不同帧的排列有两种：参考帧的基于Z字形扫描的排列和非参考帧的基于块测试的排列。仿真结果表明，在相同的压缩比下，峰值信噪比比比在无置换情况下可提高3-7db左右。(we propose a new scheme to compress 2D signals using parallel compressed sensing. According to this seheme, the reeonstruction at the decoder can be performed in parallel. By performing certain permutation on a 2D signal, all columns are insured to have approximately the same density level and can be sampled using the same measurement matrix. In this way, vectorization of a 2D signal can be avoided, and thus the size of the measurement matrix can be dramatically reduced. We prove that with a good permutation, we can have a tighter upper bound on reconstruction mean square error. To illustrate this scheme, we apply it to video compression and use two kinds of permutations for different frames: the zigzag-scanbased permutation for reference frames and the block-test-based permutation for non-reference frames. Simulation results show that under the same compression ratio, the peak signal-to-noise ratio can be improved by approximately 3-7 dB compared to the case without permutation.)

mathematical solutions os some problems

Transmit antenna subset selection in MIMO OFDM system using adaptive mutation Genetic algorithm

a MATLAB function for denoising images via wavelet transform

用于计算长程表面等离子体共振角度谱的反射率曲线(long-range surface plasmon resonance is used to calculate the spectral reflectance curves of the angle)

电脑上保存的一些vc和MATLAB混合编程的资料，其中还有vc和matcom接口的视频演示。(Computer, save some of the vc and MATLAB mixed programming information, which are vc and matcom interface video presentation.)

一个不错的matlab工程实际问题的解决方法，包括撰写MATLAB程式 ，以多组数据测试MATLAB解等(a good Matlab works the solution of practical problems, including writing MATLAB programs, with a group of data test solutions, such as MATLAB)

多种降维算法,包括lle,lpp,ltsa(many kinds of dimension reduction method)