communications

矿用电机车电控系统有两种,一种是有触点的电控系统,另一种是脉冲调速系统。以晶闸管为主要元件的脉冲调速系统在矿用电机车中仍大量使用。晶闸管属于半控型器件,其控制极只能控制开通而不能控制其关断,在低速运行时,晶闸管一经导通后,如果不能根据需要关断,则电动机承受全部电压而失去控制,电机车全速运行。本文利用MATLAB软件对矿用电机车晶闸管脉冲调速系统的主电路进行建模并仿真,对影响安全运行的关键元器件进行了详细的分析。仿真结果表明晶闸管脉冲调速系统存在安全隐患。随着电子工业的飞速发展,一种新型的全控型电力器件(绝缘门极晶体管IGBT)开始在工业中得到广泛的应用,脉冲调速电控系统如采用全控型电力器件代替半控型元器件(晶闸管),将会大大简化控制电路。由于控制电路简单,便于实现数字化控制。本文对IGBT的调速原理进行分析,采用IGBT和集成PWM脉宽调制器SG3525为主要元件,设计出了双闭环可逆自动调速系统,并对该系统进行实验验证,实验结果表明该系统优于晶闸管直流调速系统,而且运行稳定,可以很方便实现可逆运行。(Mine electric locomotive electronic control system has two types of electronic control system with contacts, and the other is the pulse speed control system. The pulse thyristor as the main component in the mining electric locomotive speed control system is still widely used. A semi-controlled thyristor type devices, the control can only control a very open and can not control the turn-off, in the low speed, the thyristor turn-on once, if not turned off as needed, then the loss of the motor under full voltage control, motor vehicle running at full speed. In this paper, MATLAB software mining electric locomotive speed control system pulse thyristor main circuit modeling and simulation, the key components of the safe operation of a detailed analysis. Simulation results show that the thyristor pulse control system security weaknesses. With the rapid development of the electronics industry, a new full-controlled power devices (Insulated Gate Transistor IGBT) began to be widely used in indu)

该程序用matlab编写实现对商标文字分割和识别。(the procedures used to achieve the preparation of Matlab trademark characters segmentation and recognition.)

ALAMOUTI performs Monte-Carlo simulation and estimates Bit Error Rate (BER) of Alamouti Scheme [1] over Rayleigh channel

qpsk程序对刚入门的同学或者朋友，有着很大的帮助。(Delayed entry program for students or just friends, a great help.)

说明：  基于Matlab的数字滤波器设计及其在捷联惯导系统中的应用(Digital Filter Design Based on Matlab and its sins of)

matlab常用函数，其中包括一些基本常用的函数，是一个不错的收集(matlab commonly used functions, including some basic common functions, it is a good collection of)

在Windows Server 2012下利用WMI实现iISCSI管理Vhdx磁盘，主要包括的方法有创建虚拟磁盘、创建iSCSI Target、格式化虚拟磁盘、删除虚拟磁盘、删除iSCSI Target(In Windows Server using WMI 2012 under the iISCSI Vhdx disk management, mainly includes the methods to create a virtual disk, create a iSCSI Target, format the virtual disk, delete the virtual disk, delete the iSCSI Target)

IP toolbox dmpler shift

MATLAB语言程序集是关于数值计算方法中使用MATLAB工具实现功能的程序集合(MATLAB language program set)

利用matlab编写的区域生长的程序，用于图像分割(Prepared using matlab region growing process for image segmentation)