least_suqare

在所考虑的时间间隔内,变化的电流、电压或功率的最大瞬间值。 (In the considered time intervals, change the maximum instantaneous value of the current, voltage or power.)

双鱼林asp.net教务选课成绩管理系统毕业课程设计源码(shuangyulin asp.net educational administration system course design source code management system)

count down clock using html codes

说明：  毕业设计，项目参考，电子商城，文档和源码(Graduation project, project reference, e-mall, documentation and source code)

搜索论坛最新主题搜例程，源码演示取论坛最新主题20贴，读取论坛帖子地址列表，使用正则搜索地址文本。(Search Latest Forum Posts search routines , source code demonstrate fetch Latest Forum Posts 20 , read forum posts address list , search for addresses using regular text .)

用C#语言编写的《物流信息发布平台》，内有详细的可运行程序源码，对于想学习ASP.NET的同学很有帮助。(Written using C# language, " Logistics Information Publishing Platform" , which can run the program detailed source, the students who want to learn ASP.NET helpful.)

无线信道中多用户MIMO的建模程序，内容详细，是老师写的(Wireless channels in multi-user MIMO modeling program, detailed, the teacher wrote it)

某美食漂亮购物网站商城(花钱买的二次开发绝对完整)仅供学习使用，禁止用于商业用途！(Beautiful shopping mall site of a food (to pay for the secondary development of absolute integrity) for educational purposes only, is prohibited for commercial purposes!)

一个DC-AC-DC的变换器，通过DC-AC的前级串联，AC-DC的后级并联，降低了MOSFET的电压应力，若采用交错控制技术，可大大减少输出电流纹波，可提高变换器的功率密度.(A DC-AC-DC converter, through the front stage series DC-AC, and the parallel of AC-DC, reduced MOSFET voltage stress, if the interleaving control technology, which can greatly reduce the output current ripple, can increase the power density of the converter. )

说明：  采样简便的FAM算法来计算OFDM信号的循环谱，利用OFDM信号的循环谱的性质可以估计出OFDM信号的载频和码片时宽。FAM算法是在时域平滑算法的基础上，提出的一种基于快速傅立叶变换的时域平滑算法。通过滑动FFT变换可以实现带通滤波，同时为了提高运算效率，对输入数据进行L倍的抽样，抽取倍数L>1。根据采样定理知，对输入数据进行L倍抽取，不会对信号的频谱的计算产生影响。那么时域平均进行计算的采样数据长度为P=N/L，因此大大降低了求解循环谱的运算量(The simple fam algorithm is used to calculate the cyclic spectrum of OFDM signal. The carrier frequency and chip time width of OFDM signal can be estimated by using the properties of cyclic spectrum of OFDM signal. Fam algorithm is a time domain smoothing algorithm based on fast Fourier transform. In order to improve the efficiency of operation, the input data can be sampled by l times, and the extraction multiple is l > 1. According to the sampling theorem, it is known that l-times extraction of input data will not affect the calculation of signal spectrum. So the average length of sampling data in time domain is p = n / L, which greatly reduces the calculation amount of solving cyclic spectrum)