obp

计算飞机起飞着陆时候的起落架中液压油的阻尼力(calculate the damping force of the landing gears)

计算三相四线制电压负序不平衡度，零序不平衡度，(three-phase voltage unbalance factor)

说明：  TM7705 单片机编程 基于单片机（C51）而进行的编程。(TM7705 MCU programming is based on MCU (C51).)

各种时间之间的转换，包括： 将GPS周和周内秒转换到公历时间， 由公历日期和GPS周内秒计算公历时间， 将公历GPS时间转换到GPS周和周内秒， 将简化儒略日转换到公历时间， 将公历时间转换到简化儒略日， 从儒略日计算公历时间， 将公历时间转换到儒略日等。(The conversion between various times, including: Conversion of GPS weeks and weeks to the calendar time, The calendar time is calculated from the date of the calendar and the seconds within GPS weeks. The GPS time of the calendar is converted to GPS weeks and within seconds, Julian day will simplify the conversion to the calendar time, The Gregorian calendar time to simplify the Julian day, Calculate the Gregorian calendar time from Julian day, Convert calendar time to Julian day.)

永磁直驱风机的MATLAB仿真，实现了基于PI控制的0d轴控制(MATLAB simulation of permanent magnet direct drive fan)

说明：  根据舰船螺旋桨噪声一书给出的计算空泡噪声的公式，简便计算各种条件下的螺旋桨噪声级的程序(According to the formula for calculating the cavitation noise given in the book "Propeller Noise of Ships", the program for calculating the propeller noise level under various conditions is simple and convenient.)

一维到二维的转换,实现二进制的转换,并且可以实现以为到二维的转换(One dimension to the two-dimensional transformation, realize the binary conversion, and can realize thought to the 2 d transformation)

说明：  适用于PCSC型读卡器与CPU卡进行交互的小程序(Small program for interaction between PCSC card reader and CPU card)

二极管实现混频的matlab验证，有注释说明，便于理解二极管混频(Matlab verification of diode realization mixing)

利用netcd库 python语言读取nc气象文件(Using Python language of netcd library to read NC meteorological files)