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By using FICE scheme, a numerical simulation of nonlinear propagation of gravity wave packet in three-dimension compressible atmosphere is presented. The whole nonlinear propagation process of the gravity wave packet is shown; the basic characteristics of nonlinear propagation and the influence of the ambient winds on the propagation are analyzed. The results show that FICE scheme can be extended in three-dimension by which the calculation is steady and kept for a long time; the increase of wave amplitude is faster than the exponential increase according to the linear gravity theory; nonlinear propagation makes the horizontal perturbation velocity increase greatly which can lead to enhancement of the local ambient winds; the propagation path and the propagation velocity of energy are different from the results expected by the linear gravity waves theory, the nonlinearity causes the change in propagation characteristics of gravity wave; the ambient winds alter the propagation path and group velocity of gr 相似文献
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乙醇诱发急性肝损伤生物标记物的探讨 总被引:12,自引:0,他引:12
转氨酶GPT和GOT是应用最广的急慢性肝损伤的指标,但乙醇诱发急性肝损伤对转氨酶的影响报道较少,有一例报道以6000mg/kgBW乙醇给小鼠灌胃,16h后小鼠血清GPT无明显升高。〔3〕大量研究表明4800~6000mg/kg乙醇对小鼠一次灌胃后4~... 相似文献
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“简易多功能灯箱”改进建议吴正平,吴少平《丝网印刷))95年第4期,鹿炳文先生介绍的“简易多功能灯箱”非常实用,与我们使用的一台差不多。我们根据多年的工作实践,提出几点修改建议,以便互相交流。一、不必用“光源安装板”,将所有电器元件直接安装在箱体上。... 相似文献
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