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“以实验为基础”是物理学科的基本特征．所以．物理实验是科学探究的重要方式。科学探究内容的教学和学习目标的实现．必须让学生亲身经历丰富的探究活动。在教学过程中．在探究活动过程中．尽可能创造条件让学生积极地动脑动手．体验科学家的乐趣和成功的喜悦．并从活动中领会科学探究的思想．把握科学探究的基本方法。那么，在物理实验教学中。如何渗透科学探究思想呢？我从以下几个方面进行尝试： 相似文献
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在会计实践中,会计目的决定了会计工作的具体程序和方法。在会计理论研究中,会计目的又是现代会计理论结构的最高层次,因此,在形势不断发生变化的情况下,我们来研究会计目标是很有必要的。 相似文献
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Based on the characteristics of 1D waves,the stress uniformity process in specimens under different loading conditions of rectangular and half-sine input waves was analyzed in split Hopkinson pressure bar (SHPB) test.The results show that the times of an elastic wave propa-gating from one end to the other in a specimen to attain stress equilibrium,is related to input wave-forms and relative mechanical impedance between the specimen and the input/output bars.Here-into,with the increae of the relative impedance,the times decreases under rectangular input waves loading,while it increases under half-sine input wave loading.The dimensionless stress value of specimen corresponding to the status of stress equilibrium increases with the increase of the rela-tive mechanical impedance.However,the dimensionless stress value under half-sine input wave loading is significantly lower than the value under rectangular input wave loading for specimen with low mechanical impedance,and the relative differentia of the dimensionless stress values under two loading conditions decreases with the increase of the relative mechanical impedance.In gen-eral,the forced state of specimen with relatively low mechanical impedance under half-sine input wave loading is evidently superior to the state under rectangular input wave loading in SHPB test,and the advantages of forced state under half-sine input wave loading turns weak with the increase of the relative mechanical impedance. 相似文献
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会计是一项实践性很强的活动,它肩负着为社会经济活动提供信息的重任,同时参与到经济管理之中。在内外、主客观因素的影响下,会计信息系统、会计从业人员必将面临各种各样的风险。以下重点探讨对会计风险的认识。 相似文献
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