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Answers for “为什么视频说单元长度之和等于近似的圆的长度?”

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The video states this as a global law for the finite element approximation: the total perimeter of the polygon formed by all the straight elements must equal the length of the approximated circle. This is the mathematical statement that follows from assembling the individual element equations.

Conditions: Applies to the assembled set of finite elements forming the approximated circle.; The equality is for the approximated polygon, not automatically the original continuous circle.

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The transition matrix PP is constructed such that the entry in row ii and column jj represents the probability of moving from state ii to state jj. Each row must sum to 1.

Conditions: The Markov chain has a finite number of states.; The state diagram shows all possible transitions and their probabilities.