The evolution equations of the soliton parameters are given from conditions eliminating secular terms, and then the first-ordercorrection is eventually obtained.
The first step requires cutting the claw of the claw, the purpose is to establish a good benchmark, in order to improve the accuracy of the correction, this step is best not to save.
第一步要求切削卡爪外圆的目的是为了建立一个良好的基准，以提高修正精度，这一步最好不要省。
3
In fact, this method is improper. The mistake results mainly from the following hypothesis: the firstordercorrection of the heat conduction equation is tenable for all parameters in physics.