A new technology is put forward for vibration drilling under changed parameters of three cutting regions for machining micro holes . a new method is probed with which optimal vibration parameters of the stages are determined by non - linear regression . present investigation shows that the new method for vibration drilling , in which vibration parameters are changed with the optimal parameters of the stages , is an effective way to decrease error of drilling micro holes 提出了三区段变参数振动钻削微孔的新工艺；探讨了用非线性回归求取各区段最佳振动参数的方法；验证了以三区段最佳振动参数做变参数时，用振动钻孔可以全面降低微孔加工误差的优良工艺效果。
Abstract : the model parameters for uniquac and nrtl equations are obtained by using the infinite dilute activity coefficients of a component at several temperature and the nonlinear regressive technique . the vaporliquid equilibrium ( vle ) data calculated by using the parameters for uniquac or nrtl equation is agreement with that from vle experiment 文摘:通过一个组分在不同温度下的无限稀释活度系数，利用非线性回归确定了四氢呋喃1 , 4丁二醇、水1 , 4丁二醇二元体系的uniquac 、 nrtl溶液模型参数.用所获得的两溶液模型参数对三元气液平衡数据进行理论推算,并与实测的三元气液平衡数据进行比较,发现两结果比较吻合
But along with the development of nonlinear regression and system identification , on - line detection and calibrating gained their former attention . chapter five in details introduces the on - line calibrating idea and method based on nonlinear regression and system identification . it also analyses the performance characteristics of this methods under two different error systems while at last gives us the simulation results 文章的第五章介绍了基于非线性回归和系统辨识模型的校正思路和校正方法，通过大量的仿真分析算法在不同的误差模型、信噪比条件下对和差通道的幅相校正对角度测量精度的影响，给出了仿真结果与结论。
The linear regression models and the non - linear regression models are established respectively , which can be used in monitoring the grassland biomass based on the vegetation indices . finally , in order to establish the grassland biomass monitoring models with higher accuracy the different forms of the non - linear regression model were established respectively , including the quadric equation , the cubic equation , the logarithmic equation , and the exponential equation . the repeated tests indicated that the cubic equation is the best one in terms of the suitability of use in the study area 建立遥感植被指数和草地生物量的一元线性回归模型和非线性回归模型，通过反复分析论证得出，非线性回归模型相对于一元线性回归模型与实测生物量更为符合；通过分析植被指数与实测生物量的不同非线性回归模型的结果，表明三次方程y = - 18 . 626rvi ~ 3 + 220 . 317rvi ~ 2 - 648 . 271rvi + 691 . 093是最适用于监测研究区草地生物量的非线性模型。
