phase transition of the second kind

The proof of the second entropy invariants of Lorenz map;

Lorenz映射第二类熵不变式的证明

The second kind of modified Bessel function of order zero is the solutions of many problems in engineering.

　第二类变型Bessel函数Kn(z)在自变量趋于无穷时就是指数变小的,使用多项式逼近的方法求解往往误差很大·　采用指数变换和J。