经纬度距离计算

说明：  对于复杂的网络系统，可以很好的计算网络效率(For complex network systems, network efficiency can be well calculated)

基于Autotrader平台的简单海龟期货策略, 该策略只作为简单学习例子(A simple turtle futures strategy based on Autorader platform is only used as a simple learning example.)

电子时钟，可以显示四位，两位显示分钟，两位显示秒，可以用按键控制清零，以及加减数(Electronic clock, you can display four bit, two bit display minutes, the second display seconds, can be used to control the key to clear, and the addition of subtraction)

说明：  加速度计、陀螺仪、磁力计的扩展卡尔曼滤波融合程序，里面附有数据，可直接运行。(Accelerometer, gyroscope, magnetometer extended kalman filter fusion program, with data, can be directly run.)

1.本文对一种高效的升压式PWM 变换电路作了分析研究 对开关状态的切换效率高 采用双零软开关工作，大大降低了开关损耗, 提 高了电路的转换效率. 2.该电路在高频的开关电源、逆变器等电力电子电路上有很大的实用价值, 可以提高电路的转换效率. -1. In this paper, an efficient step-up PWM conversion circuit analysis study on the switch to switch the state of high efficiency soft-switching double-zero work, greatly reduces switching losses, improve the conversion efficiency of the circuit .2. The circuit in high-frequency switching power supplies, inverters and other power electronic circuits have great practical value, can improve the circuit

说明：  基于戴维南模型的用来对电池SOC进行估算(SOC estimation of Thevenin model)

128条码打印DLL，通用平台都可以调用(128 bar code printing DLL)

说明：  bk蓝牙开发资料全套，包含datasheet，sdk开发包，userguide，example等等，网络上很少的(BK Bluetooth development information set, very few on the network)

控制剪贴簿用两种方法，一种是利用 clipboardData，另外一种则是用 execCommand()。 这次先介绍第一种：clipboardData。 -Satirical制cooked hugeous source shift using slander Gou Gou Yang ， instance, using clipboardData ， Hitomi Did Elsie外Gou instance, using mining Did execCommand () 。 soil Stick Um instance Ke Geng Zhuang Gou clipboardData 。 To:

说明：  ADRC控制异步电动机的matable程序(ADRC control induction motor matable program)