These are default correlation for stiffness parameters in HS-model, users are recommended to stick to that. You may change these values manually given that you know the behaviour of certain soil very well. Please note that the program will check the validity of the input parameter, users will be refrained from proceeding to next step if the input parameters are not logical, e.g. do not fit HS model.
译文：HS默认的刚度关系，我建议用户要遵循它。你可以手动修改它，但前提是你必须很清楚你的土体的性能。注意程序会检查你修改的参数的合理性，如果不合理，将不能进行下一步。
