In order to improve the inspection accuracy of free-form surface by CMM, this paper adopted different sampling parameters research influence measurement surface. Through combination area uniform block random and Latin hypercube sampling, minimum grid ball diameter were taken as parameters. Firstly, analysed theoretically Secondly, carrying out experiments verified analytical results. Then, two ...

We consider upper level sets of the Gaussian free field (GFF) on Zd, for d≥3, above a given real-valued height parameter h. As h varies, this defines canonical percolation model with strong, algebraically decaying correlations. prove that three natural critical parameters associated model, respectively describing well-ordered subcritical phase, emergence an infinite cluster, and onset local uni...