additive_delay1_jan_09

将OFDM技术运用在可见光通信的研究，并且把OFDM的高峰均比这一缺点进行了建设性的运用。(In particular, the use of OFDM (orthogonal frequency division multiplexing) for intensity modulation is investigated. The high peak-to-average ratio (PAR) in OFDM is usually considered a disadvantage in radio frequency transmission systems due to non-linearities of the power amplifier. It is demonstrated theoretically and by means of an experimental system that the high PAR in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs. It is shown that the theoretical and the experimental results match very closely, and that it is possible to cover a distance of up to one meter using a single LED.)

2011年全国大学生数学建模大赛A题，8种主要重金属元素在该城区的空间分布(National Mathematical Modeling Contest A title in 2011, eight major heavy metal elements in the spatial distribution of the city)

this code is useful to make cluster of random data in a particular group

这是一个用MATLAB做的指纹图像，希望对大家有用(This is a use MATLAB to do the fingerprint image, in the hope that useful)

Here,we want to estimate a system with ARX and ARMAX. the euation of system is : 2(s+1)/s^2+2s+2 so first, we find the discrete equation that sampling frequency is 100ms. Here,in our sample,na=nb=2,nc=1 also ,this algorithm find the poles and zeros of the system.

PCM编解码源程序 很好的程序。谢谢大家进行参考。(PCM codec good source procedures. Thank you for your reference.)

该程序演示了三角函数和双曲函数以及对数函数之间的关系，可供数学学习研究之用。 (The program demonstrates the trigonometric and hyperbolic functions and the relationship between the logarithmic functions are available for mathematics learning research.)

Here are source code for circular convolution linear convolution solution for quadratic equation

adomian 分解法 求解非线性常微分偏微分方程 很有效(adomian decomposition method)

在Simulink平台上对永磁同步电机(PMSM)实现直接转矩控制的仿真模型，使用无传感器控制方法，是国外的成品模型。(On the platform in Simulink for permanent magnet synchronous motor (PMSM) direct torque control of realize simulation model, the use of sensorless control method, is abroad finished product model.)