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1.
本文把数学和管理科学有机结合,为数学应用提出问题,得出新结果,推广了J.Michel
Harrison(1985)[1]第43页的命题27,并给出了在金融中的应用. 相似文献
2.
Aiming at the difficulty in the electrical resistance measurement, we develop a simple statistical model for the carbon nanotubes adequately dispersed in available insulated liquid and introduce the concept of “the most probability”. Based on this model, we obtain the function between macroscopic resistance R and resistance of an individual nanotube, Ro, from which one can calculate the resistance of an individual nanotube by measuring the macroscopic resistance. By computational simulation, we prove the reliability of the model. Then, we analyse the feasibility of the model when applied to experiment. 相似文献
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Both experimental and finite element model (FEM) results are presented for the dynamic strength behavior of windshield subjected
to bird impact. The experimental data taken from a series of high speed photographs are compared with the numerical results
predicted by using FEM in which the windshield was modeled entirely with solid elements and the bird body was approximately
simulated by an elastic-plastic material with failure element behavior. Effective plastic strain and element pressure were
adopted as the failure criteria and once the pressure or the effective plastic strain of an element reached the critical value,
the element would lose the tensile resistance capability completely. The deflection and stress distribution in the windshield
were obtained. It is shown that the result from the finite element analysis agrees with those from the full-scale bird impact
test.
The project supported by the National Natural Science Foundation of China (10272011) 相似文献
8.
以微观试验和流变性能试验为手段,分别研究零电场下和在电场作用下的电流变液体黏性变化规律.研究结果表明:零电场下电流变液体的黏性与Krieger-Dougherty公式具有很好的拟合效果,其中逾渗临界值强依赖于悬浮液体中固体颗粒的性质并随工作温度变化.在电场作用下,电流变悬浮液体的黏度随剪切速率的变化规律分为3个阶段:即呈线性的启动段、非线性的幂定律模型流动段和宾汉模型流动段.研究结果为电流变效应工程应用提供依据. 相似文献
9.
QUALITATIVE ANALYSIS OF DYNAMICAL BEHAVIOR FOR AN IMPERFECT INCOMPRESSIBLE NEO-HOOKEAN SPHERICAL SHELL 总被引:1,自引:0,他引:1
YUAN Xue-gang 《应用数学和力学(英文版)》2005,26(8):973-981
IntroductionIn applications, it is commonly considered that the phenomena of cavity formation,growth and run-through of adjacent cavities occur in materials as precursors to failure. Thesephenomena are mainly due to instability of materials. On the other … 相似文献
10.
Recently, it has become an important problem to confirm the bifurcation threshold value of a chaos detection system for a weak signal in the fields of chaos detection. It is directly related to whether the results of chaos detection are correct or not. In this paper, the discrimination system for the dynamic behaviour of a chaos detection system for a weak signal is established by using the theory of linear differential equation with periodic coefficients and computing the Lyapunov exponents of the chaos detection system; and then, the movement state of the chaos detection system is defined. The simulation experiments show that this method can exactly confirm the bifurcation threshold value of the chaos detection system. 相似文献