The calculation of critical load of a compressive bar by direct method based on variation principle;

The formulas of the natural frequency, critical velocity and critical pressure were established by means of direct method.

To study numerical solution of the linear equations,the article presents direct method,Jacobi iterate method and Gauss-seidel iterate method to approximately calculate,and has given its process in MATLAB.

Based on transfer matrix method(TMM)and virtual boundary element method(VBEM),proposed a direct solution to 2-D sound-structure interaction problem under harmonic excitation is proposed.

Based on the theory of variational inequality,a direct solution method of one-di.

According to the regular form of the tiles of journal bearings this paper presents a direct solution method for the finite element variational inequalities arising from fluid lubrications.

We introduce basic characteristic equations and basic transformation operators,study the direct method of solution for a class of characteristic singular integral equations and obtain the necessary and sufficient conditions for solvability of the equations and the close form of solutions.

In this paper it is given that direct method of solution for general singular integral equations on the bounds for two classes of boundless regions,where coefficient and kernel density in equations fulfill certain analytic conditions on their boundless regions.