Abstract : this paper has deduced a new method for risering ， ? parametric method . it has proved with the test curve of the british castin g p ractice commission . practical results have well perfected furt her the perimetrischen quotlent method for risering . a conclusion is drawn that rise r supplement shrink efficiency is directly proportion to the ratio of casting to riser perimetrischen quotient 文摘:提出的冒口设计新方法?参数法，与英国铸造实践委员会给出的实验曲线相互印证其实用性，进一步完善了冒口设计的周界商法；得出了冒口补缩效率与铸件和冒口的周界商比值成正比的结论。
The one and only mr . bruce lee have left us for almost 30 years , and yet till now there are still many mysteries unsolved . though there are many rumors and story about bruce , but if you put together the time , character and place , some of these stories may fit perfectly , yet some of them are just totally nonsense 一代巨星李小先生离开我们差不多三十年，到今天仍有很多谜团未解开，过往很多李小传闻和逸事的报导，当中有些能将时间人物和地点拼凑起来，作出相互印证，但有些则在李小日志中完全空白。
Then , the complementary fem based on the introduction of t - q is verified by the case study . finally , combining the complementary fem and direct method , analyse the electromagnetic field and parameter of controllable reactor . the obtained results show that the complementary fem can be applied with satisfactory accuracy in the computation of parameters of electromagnetic devices 第四，基于t ?变量的互补有限元法，在混合激励源情况下，分析计算了可控电抗器的磁场和电感参数，并通过与实测电感量的相互印证，进一步证实了互补有限元法在电磁参数计算中的应用价值。
