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厚积薄发 2011-8-29 22:13
付广洋: 啥时候受到咱内蒙的网络赛的证书
请联系数学中国站长
厚积薄发 2011-6-30 13:17
付广洋: 二师兄,啥时候第二阶段出成绩
今天已经出来了!
ximogg 2011-5-15 21:48
你知道厚积薄发是哪个山洞里的神仙了??麻烦也请告知下哈,我是他的忠实崇拜者~~~~
zhaodonghui3939 2011-4-25 13:19
The large passenger aircraft has a considerable risk for forced landing without power suddenly. As for these problems, the ** has made a research related to the airliner landing on the calm water and has got the water-entry parameters estimation.
First, the authors analyze the moment of aircraft into the water for the highly nonlinear dynamics of fluid-structure interaction. With MSC.Dytransimulation software to get the original data set, we have established parameters  to  from the attitude of the BP neural network model to simulation of passenger flow into the coupling power system .Then our prediction of the model and error analysis tell BP neural network control of  -average error 4.7%, 5.4% and 3.1%, it can accurately describe the movement of aircraft into the water during an instant.
Secondly, we research the plane into the water during exercise to meet the laws of Newtonian dynamics. With equation of Morison, we establish the corresponding dynamic model to describe the process of aircraft taxiing  classical dynamical systems. Based on the numerical Calculateeon algorithm, the discrete model, we get the result of the correspondence of and .
Finally, we consider the aircraft to withstand the maximum level of impact load  and sliding time . Based on  and  , the minimum weight function   optimization model have been established. With the search algorithms, we get the entry-water attitude and velocity. The results show we get the smallest Z when the safest Entering water attitude is , , .
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