Under the hypothesis that hydrocarbon migration conforms to the description of percolation theory,the relationship between the saturation of invading fluid(the percentage of the migration pathway to the whole lattice) and the width,length,and dimension of the simulation lattice is studied by means of up-scaling and mathematical simulation.

High efficient algorithm for building Delaunay triangulation based on virtual grid

It takes image sticking technology as its key technology and accepts an idea of virtual grid so that it makes the surface deformation measurement more simple, efficient and easy to be automated.

The joint grid system, which consists of the modified collar grid, the virtual grid and other grids, has been used in the embedding technique to solve the problem of finding interpolating cells of the internal and external boundary points near the joint regions.

Virtual price in the course of selecting cars for the departing trains and method for evaluating price are presented.

The core concept of virtual economy is virtual price.

The basic methods of “simulated market",such as building up responsibility centers, establishing simulated price and making simulated budgets, are worth generalizing widely in Aviation Groups.

The paper defines the syntax and semantics of the asynchronous asymmetric x-calculus , introduces a group of L-bisimilarities and constructs the bisimulation lattice of the asynchronous asymmetric x-calculus.