论文部分内容阅读
所谓“虚设法”是在分析和解决物理问题时,人们假设与想象出某些物理量或物理过程(如虚位移、虚功、负质量、虚电流、虚象、虚坐标系等等),然后将虚设问题与实际问题进行对比分析,确认其具有等效性。“虚设法”的可取之处在于帮助我们做一个复杂问题等效为几个虚拟的简单问题,从而使一些表面上无从入手的繁杂问题由“死”变活,由繁变简。“虚设法”解题步骤是:先分析实际问题的物理过程,找出问题的突破口然后巧设虚量(或虚模型、虚过程……),使其与实际问题等效,然后按虚设问题相应
The so-called “virtual management” is when people analyze and solve physical problems, people assume and imagine certain physical quantities or physical processes (such as virtual displacement, virtual work, negative mass, virtual current, virtual image, virtual coordinate system, etc.), and then A comparative analysis of the virtual problem and the actual problem confirmed its equivalence. The merit of “virtual management” is to help us to make a complicated problem equivalent to a few simple virtual questions, so that some complicated problems that seemingly cannot be started are changed from “dead” to simple ones. The “virtual management” problem-solving steps are: first analyze the physical process of the actual problem, identify the breakthrough point of the problem, then cleverly design the virtual quantity (or dummy model, virtual process...), make it equivalent to the actual problem, and then press the virtual problem. corresponding