共查询到20条相似文献,搜索用时 78 毫秒
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随着网络应用技术的不断发展,化学实验室的网络化程度越来越高,使在线仿真虚拟实验成为了可能。在新的网络化条件下,为了全方位提高物理化学实验的教学质量,华东理工大学化学实验中心开发了在线仿真物理化学虚拟实验系统,应用在实验前预习、实验中帮助、实验后测试等各个环节,取得了较好的教学效果。 相似文献
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虚拟仿真技术在化学实验教学中是一种新型网络学习资源,近几年在国内外发展迅速,将虚拟仿真技术应用于化学实验教学中,目的是让危险性实验变成可行性实验,打破实验只拘泥于实验室的传统学习方式,为学生探索化学知识提供更多的技术与资源支撑。从虚拟仿真技术的研究现状出发,分析了国内外关于虚拟仿真技术的相关文章,从而为虚拟仿真技术的研究提供可行性论据。 相似文献
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ERROL B. SHAND 《Journal of the American Ceramic Society》1954,37(12):559-572
Original studies and experiments that support the concept of the close association between fracture origin and flaws in glass are presented. The effect of temporary overstresses, fracture velocities during the later development of the process, and evaluation of the critical stress are discussed. Data are presented which show that temporary overstresses may weaken glass permanently and that this effect results from the slow propagation of fracture flaws. The study of fracture surfaces reveals that the velocity of the fracture crack across the section is not necessarily uniform and that the velocity characteristics of each individual fracture are determined by factors such as degree of load relaxation occurring during the dynamic phase of the process. The critical stress is estimated to be between 2.5 and 5 million lb. per sq. in., and, for any particular glass, this stress is independent of test conditions. 相似文献
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Experimental study of fuel-air explosive 总被引:2,自引:0,他引:2
G. Liu F. Hou B. Cao L. Xie Zh. Shen T. Zhou 《Combustion, Explosion, and Shock Waves》2008,44(2):213-217
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