匹配选择好所需的拟合曲线类型及其子类型，并进行相关设置： ——如果是非自定义的类型，根据实际需要点击“Fit options”按钮，设置拟合算法、修改待估计参数的上下限等参数；-Select the required matching good fitting curve type and sub-types, and associated settings:- If a non-custom types, according to the actual need to click the