1. Based on the saddlepoint approximation, this paper provides approximative lower confidence limit of reliability.

2. If not, store the faces and call approximative algorithm to get new outgoing faces, continue the recursive call from the new faces until all the reachable faces are found.

3. Formula for approximative stress calculation of expansion loop is described with a design case cited.

4. Greedy algorithm is a simple approximative method in graph coloring.

5. In the project of building road, calculating the quantity of earthworkapplies approximative formulation.

6. With the solutions of characteristic equations, we advanced an approximative algorithm for solving precise characteristic equations.

7. Generated surface can pass through points exactly or can be approximative.

8. As shown in the example, the analysis results of the early testing method and conventional approximative.

9. Methods In this paper, the authors provided the asymptotic distribution about the statistic in the formulas by using the theories of distribution and the methods of approximative calculation.