waveguide_example

计算你所指定的两个时间（通过Calender类型传入），之间所间隔的天数。指定一个时间的话则计算你指定的时间到当前时间的天数，在进度控制方面的程序中可能有用哦(Calculation of your two time specified (through the Calendar type imported), the interval between the number of days. Specify a time, then the calculation of the time you specify to the current time the number of days, in the progress of control procedures may be useful Oh)

overlap save is used to save method in dsp

new video adaption technique

配对交易和算法交易模拟交易示例，matlab环境下相应的M文件(Pairs trading and algorithmic trading simulated trading example, the M-file in the Matlab environment)

this is used for adding matrix

北航SAR代码，对脉压和SAR原理的理解很有帮助(Beihang SAR code, on the understanding of the principles of pulse pressure and SAR helpful)

Matlab codes for financial models

说明：  详细给出floyd、dijkstra算法，并给出具体例子以及如何看运行结果。所有程序均通过真实测试。(Details are given floyd, dijkstra algorithm, and gives specific examples and how to look at the results. Through all the procedures are the real test.)

Modeling mama barfi tisko Simulink

DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 (DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.)