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función para Reducir la escala de gris

This is an analog signal communication simulator, usign frequency modulation. It is designed in MATLAB-Simulink. The communications channel beetween the transmitter and the reciever is supposed to be affected by additive white Gaussian noise.

说明：  边缘方向直方图matlab程序，直方图为提取8个方向的的统计概率(Edge direction histogram matlab program, the histogram for the extraction of eight directions of the statistical probability)

两发两收的空时分组编码OFDM系统 采用SUI5信道模型(received two rounds of two space-time block coding system used SUI5 OFDM channel model)

CREATE a buffer around a polygon in Matlab

一个matlab编写的封闭边界油藏单相流体定产量生产的数值模拟程序，对学习油藏数值模拟有很大的帮助和引导作用(Matlab prepared a closed boundary reservoir volume production of single-phase fluid given numerical simulation, reservoir simulation study of great help and guide)

ＡＲＩＭＡ　matlab实现　，　对时间序列进行预测分析(ARIMA matlab realize, prediction of time series analysis)

保龄球一局分十轮，每轮可以滚球一次或多次，以击倒的球数为依据得分。(Bowling a Board sub-10, each round can be one or more ball to knock the ball based on the number of scores.)

说明：  寻找三次样条多项式需要求解大量的线性方程。实际上，给定N个断点，就要寻找N-1个三次多项式，每个多项式有4个未知系数。这样，所求解的方程组包含有4*(N-1)个未知数。把每个三次多项式列成特殊形式，并且运用各种约束，通过求解N个具有N个未知系数的方程组，就能确定三次多项式。 (find cubic spline solving polynomial need a lot of linear equations. In fact, given N breakpoints, it is necessary to look for N-1 cubic polynomial, each with four polynomial coefficients unknown. Thus, by solving the equations contain 4* (N-1) unknown. Each cubic polynomial Timing special form, and use of various constraints, by solving N with N unknown coefficient equations, we can identify three polynomial.)

抛物方程能够快速对大区域电波传播特性做出预测，目前已经得到了广泛的应用。压缩包里给出了二维抛物方程的matlab程序(The parabolic equation can quickly predict the propagation characteristics of large region waves. It has been widely used at present. In this paper, a two-dimensional parabolic equation program is given in this paper.)