Theoretical analysis and numerical experiments show that Ritz vectors obtained by the classical orthogonal projection methods may not converge to the desired eigenvectors even if the corresponding Ritz values converge.

Introduces seting up celestial coordinate system with orthography of descriptive geometry and machine drawing for calculating elevating and azimuth angle of the sun,sunrise & sunset time(in the Summmer Solstice of the Winter Solstice),house sunshine time and rational house construction plan.

This paper is concerned with graphics and addition computation of vectors by using orthography, presents diagramming consideration and steps of solving space general force system composition problem by an example, proposes that drawing computerization is fundamental way for improving diagramming accuracy.

Approximate projection methods for incompressible flow on nonstaggerd grids;

Third-order projection method for solving the incompressible Navier-Stokes equations;

Because of the decoupling of the velocity and the pressure computation,the projection method is much more efficient than the fully coupled procedures.

The evolving factor analysis (EFA) and fixed size moving window evolving factor analysis (FSMWEFA) were combined with local orthogonal projection approach (LOPA) respectively.