Current density doubles when the area of effective contact between tissue and electrode is halved,provided that HF current remains contant. 如果高频电流强度保持不变，那么人体组织和电极之间的有效接触面积减半将会使电流密度增大一倍，这将产生四倍的热量。
As a result,it is found that the electric current of EMC is related with ingot size,and the electromagnetic press balances with the static press of liquid metal. 本文推导了电磁铸过程中的磁感应强度表达式，并由此导出了电流强度与铸锭尺寸的关系式，计算的电磁压力与液体金属的静压头基本平衡。
