OFDM系统PAPR算法MATLAB仿真

弹性波二维模拟，PLM边界吸收和clayton边界吸收的比较（c++和matlab）(Two-dimensional simulation of elastic waves, PLM boundary absorption and clayton boundary on the absorption of (c++ and matlab))

MATLAB程序设 MATLAB语言与现代科学运算 高等应用数学问题的MATLAB求解(MATLAB program based MATLAB language and application of modern science and advanced computing to solve mathematical problems in MATLAB)

提出了一种求解电磁场有限元 边界元混合法所生成的线性方程组的有效方法 ———内观 法结合多波前法.由于该线性方程组的系数是一个部分稀疏部分满填充的矩阵,为了加速求解,应用内观法将系数矩阵分为 2块,一块是有限元法形成的稀疏矩阵,另一块是边界元法生成的满阵,然后用多波前法求解稀疏矩阵方程,用高斯 约当消去法解满阵方程. 采用该方法,计算了二维多层介质柱体的雷达散射截面.计算结果表明,该方法的计算效率远远高于传统的高斯法.(Proposed for solving mixed finite element boundary element linear equations generated by an effective method of Vipassana--- a combination of multi wave front method. Since the coefficients of linear equations is a part of the sparsely populated part of the full matrix, in order to speed up the solution, application of Vipassana coefficient matrix is ​ ​ divided into two, one is the finite element method for the formation of the sparse matrix, the other is the boundary element method generates the full array, and then use the multifrontal method for solving sparse matrix equation Gauss Jordan elimination method with full matrix equation solution. use this method to calculate the two-dimensional multi-layer dielectric cylinder of the radar cross section. The results show the computational efficiency of this method is much higher than the traditional Gaussian law.)

spectral analysis smoothing filter

，建立车体6个自由度加上前轮转向系统1个自由度的汽车数学模型；该汽车数学模型不需引入很多的人为假设；可以实现给定汽汽车前轮转角，也可以不给定前轮转角；不依赖需要复杂测定的侧向力函数及相关模型参数；考虑了轮胎的滚动特性 已通过测试。 (Vehicle mathematical model of one degree of freedom, the establishment of the body' s six degrees of freedom coupled with front-wheel steering system mathematical model of the car does not need to introduce a lot of people assume front wheel angle can be achieved given steam can also be given front wheel angle does not depend on the complex determination of the lateral force function and model parameters consider rolling characteristics of the tire has been tested.)

说明：  matlab程序，用于对差分方程进行参数辨识，获得参数数值(Matlab program is used to identify the parameters of the difference equation and obtain the parameter values)

Smith圆图的设计很实用的真的很实用的(Smith Chart design is very practical and really practical)

MATLAB经典案例系列的MATLAB与Excel交互的案例(EXCHANE MATLAB with EXCEL )

目标因子分析,用于找主因子数，由例子能清晰明了的理解(Target factor analysis, the number of factors used to find the Lord, by the example of clarity of understanding can)

amplitude modulation