pcb-translater_4.0

LDPC码既低密度奇偶校验码（Low Density Parity Check Code，LDPC），它由Robert G.Gallager博士于1963年提出的一类具有稀疏校验矩阵的线性分组码，不仅有逼近Shannon限的良好性能，而且译码复杂度较低, 结构灵活，是近年信道编码领域的研究热点，目前已广泛应用于深空通信、光纤通信、卫星数字视频和音频广播等领域。LDPC码已成为第四代通信系统(4G) (LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder.)

matlab下傅里叶变换的程序例程，是pdf的(under the Fourier transform matlab routine procedure is the pdf)

基于简单内膜思想的PID整定源程序，比其他算法效果好(Endometrial thinking based on a simple PID tuning source, better than the other algorithms)

livre en arabe explique application du matlab

运动学问题 平抛运动 自由落体运动 有无阻力情况等

说明：  半监督学习matlab代码程序，训练集 测试集代码，优化半监督svm 朴素贝叶斯 等等(matlab code program, training set test set code, optimized semi-supervised svm naive Bayes, etc.)

MATLAN中用simulink工具箱进行建模仿真，车辆工程搞仿真的朋友可以作为参考的例子，文件包括：1、基于Matlab／Simulink的车辆起步过程的仿真；2、基于Matlab_Simulink的四轮转向汽车操纵稳定性仿真；3、基于MATLAB_SIMULINK电动汽车感应电机建模仿真与特性分析；4、基于Matlab_Simulink环境四轮驱动混合动力汽车建模与仿真；5、基于Matlab_Simulink汽车驾驶员电动座椅控制系统的仿真设计；6、基于Simulink的电动汽车动力系统模型。(Simulation modeling with Simulink Toolbox in MATLAN, vehicle engineering simulation of friends can be used as a reference example, files included: 1, vehicle starting process simulation based on Matlab/Simulink, 2, the four wheel steering vehicle handling stability simulation based on Matlab_Simulink, 3, MATLAB_SIMULINK-based simulation modeling and characteristic analysis of induction motor for electric vehicles, 4, Matlab_ Simulink environment modeling and simulation of four-wheel-drive hybrid cars 5, based on Matlab_Simulink driver power seat control system design and simulation of 6, electric power system based on Simulink model.)

对图像进行添加噪声处理，并计算相应的峰值信噪比的matlab程序。(A matlab program: add noise to an image and calculate correspondly the Peak Signal to Noise Ratio . )

复合材料的优化,内容里边有很好的描述以及很多的计算实例,适合进阶学习(Objective of this Matlab s program was researched optimization analysis of laminated composite plates for determined the ultimate strength and stress effects of plate s under the regular and uniform out-loads. Therefore, generally Reissner s flat and thick shell finite element model (4Node-20Dof) was developed with first-order shear deformation theory (FSDT). Kirchhoff s classical laminate plate theory yields in adequate results for thick plates (a/th<20). This classical laminated plate (CLPT or CPT), was one of the first developed by Reissner with shear deformation theory. Afterwards, Mindlin was utulizated this shear deformation theory to accommodate rotary of inertia terms on per unit freedom. If this plate system s be very thick (a/th<10) than it is fail to shear deformation-motion and it s condition of adaptive shear stress on plate s top and bottom surface. While this conditions was produced on plate s segment when requered the shear correction factor of shear locking eff)

说明：  程序mtlab中的代码-地震波反应谱与时程波相互转换(Interconversion between seismic response spectrum and time-history wave)