排序方式: 共有7条查询结果,搜索用时 171 毫秒
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欠阻尼振动的合成与对数螺线宋燕盛,包爱东,宋华珠(吉林工学院长春130012)在实际的振动系统中,总是存在着阻尼,研究阻尼振动具有普遍意义和实际意义.我们用振动示波装置”‘考察了两个相互垂直、同频率、同振幅、位相差为的欠阻尼振动的合成,其合成振动曲线... 相似文献
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变验证为探索的实验课包爱东(内蒙古电力学校呼和浩特市010020)物理学是一门以实验为基础的学科.它的定律和理论大都是建立在观察和实验的基础上的.如在“牛顿第二定律”的教学中,以往都是由教师边演示,边讲解,然后得出的关系.最后由学生做实验验证定律.因... 相似文献
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A topological way to distinguish divergences of the Abelian axial-vector current in quantum field theory is proposed. By using the properties of the Atiyah-Singer index theorem, the nomtrivial Jacobian factor of the integration measure in the path-integral formulation of the theory is connected with the topological properties of the gauge field. The singularity of the fermion current related to the topological character can be correctly examined in a gauge background. 相似文献
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With the help of a postulate of gauge group parameter involved with ghost fields, the infinitesimal gauge transformation laws preserving the gauge-invariance of the quantum Lagrangian itself of the quantized Glashow- Weinberg-Salam model are established precisely. The corresponding Ward-Takahashi identity for the model is derived exactly. 相似文献
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