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物理是一门以实验为基础的学科,对实验的多方位、多角度的思考能全面提高学生的思维水平,培养学生综合运用所学知识解决实际问题的能力,本文以“用单摆测量重力加速度”的学生实验为例,从数据处理、实验条件、实验目的、实验原理等几个方面,就如何进行对实验进行多层面的思考谈几点看法。 相似文献
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The analytical solution of a multidimensional Langevin equation at the overdamping limit is obtained and the probability of particles passing over a two-dimensional saddle point is discussed. These results may break a path for studying further the fusion in superheavy elements synthesis. 相似文献
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In this paper, the reflection phenomenon of a vapor shock front (both sides of the front are in the vapor phase) in a van der Waals fluid is considered. Both the 1-dimensional case and the multidimensional case are investigated. The authors find that under certain conditions, the reflected wave can be a single shock, or a single subsonic phase boundary, or one weak shock together with one subsonic phase boundary, which depends on the strength of the incident shock. This is different from the known result for the reflection of shock fronts in a gas dynamical system due to Chen in 1989. 相似文献
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在未来导航中,驾驶员应该作为人机交互的核心,可视化是导航系统的发展方向.针对于此,本文在总结现代平显优缺点及外国先进战斗机座舱的基础上,对可视化技术在飞机智能融合导航综合控制显示中的应用进行了初步探索.本文在提出多层面数据迭加处理技术、综合图形图象信息显示方法和导航语言概念的同时,研究了在智能融合导航中,可视化系统的结构、功能、实现过程及技术,对于我国未来导航系统中可视化的研究有着重要的实用价值. 相似文献
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李慧玲 《应用数学和力学(英文版)》2009,30(6):727-740
Using finite differences and entropy inequalities, the global existence of weak solutions to a multidimensional parabolic strongly coupled prey-predator model is obtained. The nonnegativity of the solutions is also shown. 相似文献
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