SLNRprecoding

kriging（克里金）插值方法，参照2011年国赛建模A题前两问。(kriging (kriging) interpolation method, with reference to 2011 model A country race before the two asked questions.)

二相相移键控（BPSK）调制解调过程的MATLAB仿真实现。ASK、FSK、PSK这三种数字调制方式在抗干扰噪声能力和信号频谱利用率等方面，以相干PSK的性能最好，目前已在中、高速传输数据时得到广泛应用。(Binary phase shift keying (BPSK) modulation and demodulation process, MATLAB Simulation. ASK, FSK, PSK modulation in the three digital noise interference and signal spectrum efficiency, etc., to the best performance of coherent PSK, is now in the middle and high-speed transmission data are widely used.)

这两本教材是关于MATLAB的,内容非常丰富,即适合初学者,也适合高手继续学习,是难的的好教材.希望对大家学习有帮助(those two books is about matlab.)

It is about matlab which depicts brain image segmentation

说明：  QPSK 调制解调入门matlab代码，有注释。(Introduction to QPSK, with comments.)

说明：  结构分析中的有限元法利用matlab实现的教材(Structural analysis of the finite element method using matlab implementation of teaching materials)

some files to calculate: Divergence Plotter , Curl Plotter , Scalar Line Integrator , Vector Line Integrator , Flux Integrator , Discrete Electrostatics Plotter , Laplacian Solver

光伏电池阵列输出功率受光照强度和温度变化的影响，因此最大功率点跟踪（MPPT）技术广泛应用于光伏系统中。在所有最大功率点(MPP)控制策略中，扰动观察（P&O）MPPT算法因易实现被广泛应用，然而它的缺点是在稳定工作状态下工作点通过MPP 时会导致能量振荡损耗，并且在光照强度或温度发生突变时表现较差的动态响应。在本文中，提出一种改进型变步长扰动观察MPPT 算法，此方法依据工作点动态调整步长变化，与传统固定步长方法比较，本文提出的方法能有效地提高MPPT 速度和转换效率，通过仿真和实验结果分析，验证了此改进算法的可行性。(PV array output power by light intensity and temperature changes, so the maximum power point tracking (MPPT) technology is widely used in photovoltaic systems. In all the maximum power point (MPP) control strategy, the perturbation and observation (P & O) MPPT algorithm because easy to implement is widely used, but its disadvantage is the steady-state operating point by the MPP causes energy oscillations loss, and in the light intensity or temperature mutated poor performance dynamic response. In this paper, we propose a modified variable step size perturbation and observation MPPT algorithm, this method is based on dynamically adjusting the operating point changes in steps, with the traditional fixed-step methods, the proposed method can effectively improve the speed and efficiency MPPT, The simulation and experimental results verify the feasibility of this algorithm.)

对于39节点配网潮流计算，用前推回代法编写的matlab程序，加压后直接运行(For the 39 node distribution network power flow calculation, using forward and backward substitution method to write matlab program, run directly after pressurization)

说明：  s32k144的电机控制simulink模型，可生成elf和mot文件(S32k144 motor control simulink model, which can generate elf and mot files)