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descripteur sift 3D

ofdm的发射机用matlab仿真实现，浅显易懂，适合初学者使用(transmitters ofdm simulation using matlab, easy to understand and use for beginners)

这一信道模型能够描述由电离层和对流层反射的短波信道，以及建筑物密集的城市环境。12瑞利衰落只适用于从发射机到接收机不存在直射信号（LoS，Line of Sight）的情况，否则应使用莱斯衰落信道作为信道模型(This channel model is able to describe the HF channel reflected by the ionosphere and troposphere, as well as building a dense urban environment. 12 Rayleigh fading only applies to from the transmitter to the receiver there is no direct signal (LoS, Line of Sight), otherwise use Rician fading channel as the channel model)

stirling engine simulation with matlab

帧差发源代码，来自matlab中文论坛，毕业设计需要(The frame difference originated code from Matlab Chinese Forum, graduation design needs)

说明：  此代码为17年全国大学生数学建模竞赛A题程序(This code is a 17-year National College Students Mathematical Modeling Competition A program)

MATLAB的MLR算法，希望对同学的学习有帮助(mlr MATLAB algorithm, very useful, I hope to learn some help)

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采用了小波去噪的思想，关于超声波倒车雷达测距的，外文资料里面的源代码。( Using wavelet denoising thought, About ultrasonic parking radar ranging, Foreign materials inside the source code.)

说明：  matlab数值计算 实例非常丰富 各种数值基本包含在内。(matlab numerical calculation is very rich in a variety of numerical examples of the basic included.)