This paper described the establishment of the mathematical model for hot-spot thermal conductance of oil three-phase transformer and the deduction of the involved calculation method.
本文叙述了三相油浸变压器热点热传导数学模型的建立及计算方法的推导。
The paper forword a mathematical model of stream function for sinkings with no internal mandrel and applies the upper bound approach principle to make further deduction and calculation.
对无芯棒缩管提出了流函数的数学模型，应用上限原理加以推导和数值运算。
Mathematical deduction is made to change it into iterative model.
数学推导，把它变成迭代模型。
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