对数正态分布函数的源码，用来测试颗粒物浓度时亲测可用，值得下载(The source of lognormal distribution function is used to test particulate matter concentration, and pro test is available, which is worth downloading.)

柯西分布函数的源码，用来测试颗粒物浓度时亲测可用，值得下载(The source of Cauchy distribution function can be used to test particulate matter concentration, and it can be downloaded.)