AD835

自己用Matlab写的FFT的代码，主要是为了FPGA实现的前期建模(FFT using Matlab to write their own code, mainly to preliminary modeling of FPGA implementation)

摘　要:根据HFC网络上行信道的特性,建立了信道模型 分析了上行信道中存在的各种噪声对QPSK 调制技术的影响。结果表明在C /N (传输信道载噪比)较低的情况下,采用QPSK调制方式,可以提高系 统的抗干扰能力。 关键词: QPSK 光纤同轴电缆混合网 上行信道 噪声(Abstract: HFC network in accordance with the characteristics of the uplink channel, the establishment of a channel model an analysis of the various uplink channel noise on the impact of QPSK modulation. The results show that the C/N (transmission channel carrier-to-noise ratio) lower, the use of QPSK modulation, can improve the system of anti-interference ability. Keywords: QPSK hybrid fiber coaxial cable network uplink channel noise)

ekf在无源导航中的应用，涉及到了cv模型的仿真(EKF passive navigation in the application, relates to the cv model simulation)

Modern instrumentation in nuclear

Matlab/Simulink下的风力发电仿真程序，可用于研究风电并网下稳态、暂态以及故障运行时的系统状态，内附与程序相对应的论文。(Matlab/Simulink simulation program under wind power can be used to study wind power under steady state, transient and fault runtime system state, containing papers that corresponds with the program.)

projected coordinate systems

这个程序是3机9节点潮流计算的程序，是电力系统编程的入门程序(power flow machine 3)

能量熵的计算，小波包分析提取振动信号中的特征频率，借鉴了主成分分析算法（PCA）。( Energy entropy calculation, Wavelet packet analysis to extract vibration signal characteristic frequency, It draws on principal component analysis algorithm (PCA).)

说明：  BP神经网络轴承故障诊断，列举几种常见轴承故障信号，使用matlab编写BP神经网络进行诊断(Bearing fault diagnosis based on BP neural network)

接地技术最早是应用在强电系统（电力系统、输变电设备、电气设备）中，为了设备和人身的安全，将接地线直接接在大地上。由于大地的电容非常大，一般情况下可以将大地的电位视为零电位。后来，接地技术延伸应用到弱电系统中。对于电力电子设备将接地线直接接在大地上或者接在一个作为参考电位的导体上，当电流通过该参考电位时，不应产生电压降。然而由于不合理的接地，反而会引入了电磁干扰，比如共地线干扰、地环路干扰等，从而导致电力电子设备工作不正常。可见，接地技术是电力电子设备电磁兼容技术的重要内容之一，有必要对接地技术进行详细探讨。(Grounding technology was first applied in strong electric system (power system, power transmission equipment, electrical equipment), in order to equipment and personal safety, the ground wire directly connected to the earth. Because the earth capacitance is very large, under normal circumstances can be considered to be zero potential earth potential. Later, grounding techniques applied to extend the weak system. For power electronic devices directly connected to the ground wire on the ground or connected to a reference potential as a conductor, when the current through the reference potential, and should not generate voltage drop. However, due to unreasonable ground, but will the introduction of electromagnetic interference, such as co-ground interference, ground loop interference, resulting in power electronic equipment is not working properly. Visible, grounding technology is an important part of power electronic equipment EMC technology, it is necessary for grounding techniques disc)