精确的电磁场theta,phi和azimuth,elevation坐标系统相互转化程序，可不限次数来回转化而不损失精度，灰常强大哦。 Accurate Electromagnetic field transform between (theta,phi) and (azimuth,elevation) coordinate system. You can do the transformation with unlimited times without the loss of accurac
向量场
3D矢量场（流场）的数据结构和查找。
安装
npm install vector-field
用法
参见。
import VectorField from "vector-field" ;
let time = 0 ;
const directionFn = ( [ x , y , z ] ) => {
const n = myNoise4D ( x , y , z , time ) ;
const theta = n ;
const phi = n ;
ret
We present a 3~5 \mum optical parametric oscillator (OPO) based on ZGP pumped by KTP OPO 2.1-\mum laser. The tuning curves of ZGP OPO are calculated. The 8 \times 6 \times 18 (mm) ZGP crystal, whose end faces are antireflection coated at 2.1 and 3.7~
