ganzhiqi_newp

matlab出错信息的技术，可以帮助我们快速找到出错的原因，提高编程效率。(matlab error information technology that can help us quickly find the wrong reasons, to improve programming efficiency.)

扩展卡尔曼滤波算法用matlab实现。分别计算出观测值和卡尔曼滤波值进行对比。(Extended Kalman filter algorithm using matlab implementation. Observed values were calculated values were compared and Kalman filtering.)

plot function maximum and minimum matlab

在频率域实现信号的频移，然后再变换回时间域的信号(In the frequency domain, the frequency shift signal is achieved, and then transformed back into the time domain signal)

Using the pcolor knowlegde and colormap concatenation technique to create axes objects with different colormaps

假设微电网中有风、光、微型燃气轮机、蓄电池，且已知各时段负荷需求；考虑各机组运行成本、燃料成本、与污染物处理成本。该程序可解决在孤岛运行模式下，各机组出力如何分配才能达到经济最优的问题。(It is assumed that there are wind, light and micro gas turbines and batteries in the microgrid, and the load demand is known at each time period. The operation cost, fuel cost and pollutant disposal cost of each unit are considered. This program can solve the problem of how to allocate the power of each unit in the mode of island operation to achieve the best economy.)

说明：  This is a matlab code to simulate PAPR Vs CCDF of Selective Mapping (SLM) based Peak-to-Average power reduction of OFDM signal.

matlab编写的预应力混凝土梁全过程分析，并给出最后的弯矩曲率图。(prestressed concrete beam matlab prepared the whole process of analysis, given the last moment curvature diagram.)

This function obtains the pi model of a transmission line the ABCD constants of the line.

一、椭圆型偏微分方程 1. Helmholtz方程 及 特例（Possion方程， Laplace方程）； Helmholtz.m possion 2. 满足牛顿边值条件的Helmholtz方程；Helmholtz_Newton.m 二、抛物线型偏微分方程 1. 显式前向欧拉法 EF_Euler.m 2. 隐式后向欧拉法 IB_Euler.m 3. Grank-Nicholson法 Grank_Nicholson.m 4. 二维热传导抛物线方程 TDE.m 三、双曲线型偏微分方程 1. 显式中心差分法（一维波动方程） ECD_Wave.m 2. 显式中心差分法（二维波动方程） Wave2.m 四、有限元法 二维偏微分法方程（拉普拉斯方程） fem_basis_ftn.m Show_Basis.m fem_coef 五、使用GUI形式的偏微分方程求解工具求解偏微分方程（PDETOOL） 来自《精通Matlab科学计算》第三版(Numerical Methods for PDE)