大气环境模型，输入高度值，就可以得到规定高度的大气压强、密度、声速、等各种参数值！-Atmospheric environment model, enter the height value, can be provided for a high degree of atmospheric pressure, density, sound velocity, and other parameter values!

C#实现的dbscan算法，实现密度聚类功能，可以作为开发参考，或者直接使用-Dbscan algorithm is implemented in C# to achieve density clustering feature can be used as development of reference, or directly use