tnn

说明：  一个用于求圆周率pi的matlab算法。题目背景：取一长面积为1平方米的正方形白纸，在白纸的内部画一个直径为1米的圆，如下图所示。此圆恰好与正方形的四条边分别切于一点，它的面积是 pi*（1/2）^2 =pi/4 ,然后，你可以抓一大把芝麻，一粒一粒地随便地扔到白纸上。在你扔麦子的过程中可以请一位朋友帮助记录：一共扔了几次？有几次是扔在圆里面？ 实验结束后，你只须用“芝麻落在圆里的次数”除以“一共扔的次数”得到的结果就是圆的面积。则pi就是“圆的面积*4”了 当然，你扔的次数越多，结果就越精确！()

计算各种技术指标的测试程序。给出任意一个技术指标的信号发生量，将计算出相应的净值，胜率，盈亏比，持仓时间等。(Calculate the test procedures for a variety of technical indicators. Given the amount of any technical indicators signal generation, will calculate the corresponding net, winning percentage, profit and loss ratio, positions time.)

這是一個讓原始音訊可以再不改變音訊長度下，改變pitch的程式，因為如果音訊用resample，雖然可改變其音訊頻率音高，但是卻會有拉長音訊的副作用，因此設計了一個可以改善其缺點的小方法(實做paper ）(This is an original audio so that you can no longer change the audio down the length of the program to change the pitch because if the audio with resample, although it can change the pitch of the audio frequency, but the audio will be stretched side effects, and thus can improve the design of a small way shortcomings (real do paper))

艾伦方差的matlab编写，用于MEMS陀螺仪随机误差辨识(ALLAN variance matlab writing)

基于时频掩码的稳健MVDR波束形成 离线ASR(ROBUST MVDR BEAMFORMING USING TIME-FREQUENCY MASKS FOR ONLINE/OFFLINE ASR IN NOISE)

matlab绘制连续时域信号时域波形，初学者可以借鉴一下这些程序熟悉命令。(matlab draw for time-domain signal waveform in time domain, beginners can learn from these procedures are familiar with the order.)

一个用于图像识别的程序，用matlab编的(an image recognition for the program, part of the Matlab)

raytracing program for seismic forward modeling

说明：  无线传感器收集数据，实时传送并利用神经网络算法估计监测区域内是否有人(Wireless sensor data collection, real-time transmission and use if someone within the neural network algorithm to estimate the monitoring area)

this paper talks about ofdm synchronization for selective fading channels,hope it to be of help to evrybody