METHOD FOR DETERMINING FIRST-ORDERPARTIAL DERIVATIVE OF NONLINEAR MODEL AND ITS APPLICATION IN TLS ACCURACY ASSESSMENT
非线性模型的一阶偏导数确定方法及其在TLS精度评定中的应用

On the basis of the total least-squares(TLS) data processing theory and an iterative algorithm for TLS,first-order partial derivative of the nonlinear model was determined by using Taylor formula and the error magnitude of the results was derivated.The method was applied to the TLS precision evaluation,and the method for reliability testing is proposed.The experimental results verify the feasibility of the method in TLS precision evaluation.