计算流体力学，外掠平板的流场与换热的学习算例-Computational fluid dynamics, grazing outside the flow field and heat transfer plate example learning

一个流体热量传输的用户自定义函数UDF,适合Fluent学习。-A heat transfer fluid user-defined function UDF, suitable Fluent learning.

一个在abaqus中实现传热分析的文件，为一个输入文件，对于学习abaqus的人有很大帮助-A heat transfer analysis is realized in abaqus file, as an input file, are of great help for learning of abaqus

最近在学习GPS解算算法时需要在GPS时（GPS周和周内秒）和公历日期之间进行转换，于是就整理了一些时间转换的小程序。 本文介绍了GPS时、公历、儒略日（JD）、简化儒略日（MJD）之间的转换函数。(Recently, when you are learning the GPS algorithm, you need to convert between GPS (GPS weeks and weeks) and the calendar date, so you sort out some s