HHTquintessence

在电机调速应用中设计的三相电流滞环比较法(Motor speed control applications in the design of the current hysteresis in comparison )

一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。(Simulation and Design of a relatively complete OFDM communications system, including coding, modulation, IFFT, down conversion, Gaussian channel model, FFT, PAPR suppression, various synchronization, demodulation and decoding module and simulation of system performance omnibus the reliability of system design.)

考虑L的三个不同值：L＝256（3个数据段），L＝128(7个数据段)和L=64（15个数据段）。各自的谱估计图如上图所示。可以明显的看到，加窗明显的减小了频谱上的假谱峰，但也更加进一步平滑了谱峰。所以，对于L＝64的情况，在ω＝0.8π的谱线可以很确定的辨认，但是那两个靠近的谱峰不容易区分。对于L＝128的情况，这种情况提供了在分离和检测间最好的均衡。当然，对于在L＝256时的情况，效果是更好的，能够从谱估计图上明显的分辨出三条谱线的存在以及它们幅度关系的强弱。 除了Welch法外，还可以采用对多个周期图求平均的功率谱估计方法的其他方法如Bartlett法等等，在功率谱估计上也能取得较好的结果。(consider three different values : L = 256 (3 data), L = 128 (7 data) and L = 64 (15 data). Their spectral estimation map as shown in Fig. It is clear to see that increase significantly decreasing window of the spectrum of false peaks, but much more to further smooth the peaks. Therefore, L = 64, in the case = 0.8 spectrum can determine the identification, but that the two peaks around is not easy to distinguish. L = 128 for the situation, which provided the separation and detection among the best balanced. Of course, L = 256 in the case, the effect is better, from the spectral estimation map clearly distinguish between the three lines of the existence and their relationship to the rate of strength. In addition to Welch law, but also can be used to map multiple cycle for the average power)

Matlab程序，可用于计算太阳方位角！(Matlab program can be used to calculate the solar azimuth. )

数值分析的部分matlab代码分享，如有错误还请见谅！(Part matlab code analysis of numerical analysis, please forgive me if there is any mistake.)

Transband function which is used in fingerprint identification

采用MATLAB编写的“剪刀石头布”小游戏，供学习MATLAB的程序员练习。解压后，在MATLAB命令窗口直接输入文件名即可运行。(It is a simple game coded by MATLAB. It is useful to the biginner of MATLAB programmer.)

利用matlab引入数据，对数据进行处理(By using matlab is introduced into data, the data processing)

用vs2013写的霍夫曼编码程序，可将.txt中的英文字符串（包括各种字符如：逗号）编码后输出到一个.txt中，并且可输出构建的霍夫曼树,保存编码方式。(Huffman coding using vs2013 to write programs in English can be txt string (including a variety of characters such as: the comma). Encoded output to a txt, and can output to build Huffman tree, save the encoding. .)

源码给出了非线性线性规划的牛顿法，代码包含函数文件，以及调用文件，下载即可运行！(Source given nonlinear Newton method for linear programming, the code contains the function file, and call the file, download to run!)