在中心势场中粒子运动轨道方程的基础上，进一步讨论粒子轨道的闭合性、稳定性。
Based on the orbit equation of particle motion in central force field, the stable property and close property of orbit were discussed.
本文定义了液化势评价准则，并对该坝在1976年唐山大地震时的稳定性进行了分析。
Criteria for evaluating liquefaction potential are defined and then the seismic stability of Douhe River dam during the 1976 Tangshan earthquake is analysed.
膜的可蚀性及肖特基势垒的热稳定性能够满足自对准栅IC的要求。
The etched ability of the films and the high temperature stability of the Schottky barrier satisfy the requirements of SAG ICs.
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