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正项级数敛散性的密率判别法 被引量:3
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作者 张新元 吕冰清 《南都学坛(南阳师专学报)》 2000年第3期23-25,共3页
借鉴数论方法中的密率论 ,给出判别正项级数敛散性的密率判别法 。
关键词 正项级数 倒数数列 敛散性 密率差别法 函数
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Dynamic Reliability Evaluation of Double-Layer Cylindrical Latticed Shell under Multi-Support Excitations
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作者 柳春光 李会军 《Transactions of Tianjin University》 EI CAS 2010年第5期388-394,共7页
To overcome the excessive computational cost and/or bad accuracy of traditional approaches,the probabilistic density evolution method(PDEM) is introduced.The dynamic reliability of a double-layer cylindrical latticed ... To overcome the excessive computational cost and/or bad accuracy of traditional approaches,the probabilistic density evolution method(PDEM) is introduced.The dynamic reliability of a double-layer cylindrical latticed shell is evaluated by applying PDEM and Monte Carlo Method(MCM) respectively,and four apparent wave velocities(100 m/s,500 m/s,800 m/s and 1 200 m/s) and five thresholds(0.1 m,0.2 m,0.3 m,0.4 m and 0.5 m) are taken into consideration.Only the difference between threshold and maximal deformation... 展开更多
关键词 shell structure RELIABILITY Monte Carlo method probability density evolution method finite difference method EFFICIENCY
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