CryptoAPI2

Handling null fields in SQL queries

说明：  模拟高阶拉盖尔-高斯光束，里面包含注释，非常详细。(Simulation of high order Laguerre-Gaussian beams, with annotations, very detailed.)

iidx one to bms. can change version when you need. the source is 20. you need .1 and .2dx file.

该程序实现瞬变电磁法三维正演，其中场源可以是多个。(The program realizes the 3D forward modeling of transient electromagnetic method, in which the field source can be multiple.)

说明：  用Esp8266与贝壳物联链接并控制，可以加入天猫精灵(Using esp8266 to link with shell and control)

stm32f103 can bus on sn65hvd233d

说明：  通过加截特殊字符，自定义LED字体效果，内附LED字体文件，可直接运行(Custom LED font effect)

说明：  lammps计算硅的晶格常数和弹性模量，附代码与实例，较详细(An example of lammps to calculate the lattice constants and modulus of silicon.)

此程序是利用经纬度时间等信息，计算特定时间特定地点的太阳天顶角。(This program uses information such as latitude and longitude time to calculate the solar zenith angle at a specific location at a specific time.)