matlab三维

能模拟一维光子晶体的传输参数和它的色散关系的模拟程序。(Can simulate one-dimensional photonic crystal and its transmission parameters of the dispersion relation of the simulation program.)

This is a matlab software package for butterworth band pass filter design. you could change the high pass and low pass frequency to design the betterworth filter.

this program finds the number of zero crossings in a given signal.

ldpc编码，在加性高斯白噪声情况下描述出它的误码率随信噪比变化的情况(ldpc coding, in the additive white Gaussian noise cases, describe its bit error rate with signal to noise ratio the changes in the)

频域采样理论是数字信号处理中的重要理论。要求掌握模拟信号采样前后频谱的变化，以及如何选择采样频率才能使采样后的信号不丢失信息( Frequency range sampling )

英国谢菲尔德大学开发的遗传算法工具箱，很实用，很强大(Sheffield genetic algorithm tools)

《空间谱估计理论与算法》一书中提到的cbf波束形成算法的源代码，是较简单的源代码(" Spatial spectrum estimation theory and algorithms," a book mentioned in cbf beamforming algorithm source code, is relatively simple source code)

This example of AC-DC-AC converter illustrates use of Universal Bridge, Multimeter, and Powergui blocks, as well as discrete control blocks of the Extras library.(A 60 Hz, voltage source feeds a 50 Hz, 50 kW load through an AC-DC-AC converter. The 600V, 60 Hz voltage obtained at secondary of the Wye/Delta transformer is first rectified by a six pulse diode bridge. The filtered DC voltage is applied to an IGBT two-level inverter generating 50 Hz. The IGBT inverter uses Pulse Width Modulation (PWM) at a 2 kHz carrier frequency. The circuit is discretized at a sample time of 2 us)

检查文件夹中有多少个文件，以及调用相应的文件(check how many files in the directory)

The computing world has undergone a revolution since the publication of The C Programming Language in 1978. Big computers are much bigger, and personal computers have capabilities that rival mainframes of a decade ago. During this time, C has changed too, although only modestly, and it has spread far beyond its origins as the language of the UNIX operating system.