chapter18_S

一个近似熵的源代码，一个熵代码，主要运行环境：matlab.第一个主要用与生物信号的检测,主要用于生物医疗工程的信号处理方面。（由matlab高手编）(An approximate entropy of the source code, an entropy code, the main operating environment: matlab. The first major use with the bio-signal detection, mainly for biomedical signal processing aspects of the project. (From matlab master ed.))

funcion que determina la autocorrelacion entre muestras consecutivas de un segmento de voz

an investigation on use of chaotic sequence in DS-CDMA. The DS-CDMA systems offer physical layer security without the need for a significant increase in computation or power requirements. Nowadays, DSCDMA has been used widely. These systems suffers from multiple access interference because of other users transmitting in the cell, channel inter symbol interference and additive white Gaussian noise. Codes have an effective role in DSCDMA system, so M-sequences; gold sequences have been used as spreading codes in DS-CDMA. These sequences by shift registers and periodic in nature are developed. However, these sequences are not enough and also limit the security. This paper presents an investigation on use of new type of sequences called chaotic sequences for DS-CDMA system. These sequences by chaotic maps are generated.

说明：  本程序主要是实现最优多用户检测，从而能够实现最优的误码率性能和最好的抗远近效应能力。(Multi-user Dectection )

1）基于最大类间最大距离比准则的图像分割.m 2）最大熵准则的图像分割.m(1) The maximum distance based on the maximum between-class image segmentation than the guidelines. M 2) guidelines for maximum entropy image segmentation. M)

在带限信道信号传输的仿真。仿真4PAM调制信号在AWGN信道下的性能，画出误比特率和误符号率。 (In the band-limited signal transmission channel in the simulation. Simulation 4PAM modulated signal in AWGN channel performance.)

说明：  如果对实际工程结构作简化处理，建立其动力学模型，并确定系统的质量、刚度、阻尼参数，便可以用多种方法建立系统的动力微分方程。常用的方法有直接 法、影响系数法、拉格朗日法以及有限元法等。拉格朗日法是从能量的观点建立系统的动能T、势能U和功W之间的标量关系，是研究静、动力学问题的一种方法。如果在选定运动坐标以后，能够设法求得坐标相对应的质量矩阵和刚度矩阵，就可以用影响系数法建立多自由度系统运动微分方程[4]。本文采用拉格朗日法建立了1/4车辆几何模型。(If the actual engineering structure is simplified, its dynamic model is established, and the mass, stiffness and damping parameters of the system are determined, the dynamic differential equation of the system can be established by various methods. The commonly used methods are direct method, influence coefficient method, Lagrange method and finite element method. Lagrange method is a method to study the static and dynamic problems, which is to establish the scalar relation among kinetic energy t, potential energy u and work W from the point of view of energy. If the mass matrix and stiffness matrix corresponding to the coordinates can be obtained after the motion coordinates are selected, the differential equation of motion of the multi degree of freedom system can be established by the influence coefficient method [4]. In this paper, 1 / 4 vehicle geometry model is established by Lagrange method.)

matlab的教程，例题，包括数值，符号，图像等运算及答案(matlab tutorials, sample questions, including the values, symbols, images and other computing and answers)

XYZ转NEU坐标，非常实用，可以学习下，matlab(XYZ too NEU)

说明：  有两个程序，用于研究Mallet算法及滤波器设计和消噪(are two procedures for research and Mallet filter algorithm design and denoising)