在总结前人经验的基础上，通过平板堆焊实例利用直接法同时计算焊接温度场和应力场，模拟出了焊接过程。
Based on summing up others' experience, this paper research the direct method to calculate and simulate the temperature and stress field at the same time through a board surfacing welding sample.
结果：在总结前人经验和相关实验研究的基础上，徐主任提出了富有特色的冠心病心律失常中医辩证治疗独特思路。
On the foundation we can summarize the keys of syndrome differentiation, the characteristic of therapeutic methods, and the rule of medication of director Xu.
目前合成硒醚的方法尚有很多不足之处，我们在总结前人经验的基础上，用硒格氏试剂作反应物，直接与卤代物或烯烃反应制得一系列硒醚。
Based on the former research works, we used magnesium selenolate as reactant to react with RX or styrene to synthesize a series of selenide. Followings are the main research results:1.
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