To estimate ERP parameters, two different ways are involved: one is the parameter transformation, the other is direct adjustment method with restrictive conditions.

For the geometry matching search that appeared in the product configuration design based on case reasoning,the similarity model of geometric attributes denoted in the different ways was put forward,the objective function about parameter transformation was constructed by using the principle of least squares,the 6 unknown variables were solved by adopting the algorithm of bound constraint BFGS.

Using RTK to solve WGS-84 and the discussion of coordinates with the city of transformation parameters

This paper studied and solved the key problems of connection survey,determination of transformation parameters,programming of transformation softw.

If the transformation parameters are solved with the GPS data in a small area,the precision of transformation parameters may be very poor,especially the translation parameters.

This paper solves the forecast problems of various models by using constant dimension fractal, variable dimension fractal and parameter transformation fractal methods.

In the paper,by introducing a parameter transformation α=ε/(υ2+ε) and supposing ω2 0=(pυ/q)2+α△,the strongly nonlinear system is transformed into a weak nonlinear system.

By introducing a parameter transformation and based on a hypothesis, the strongly nonlinear conservative system was transformed into a weakly nonlinear conservative system, whose solution was expanded by Fourier series.