研究机械装配中的对称群方法。

The symmetry group approach in mechanical assembling is studied.

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利用置换群方法研究了具有邻近相互作用的一维海森堡自旋12开链模型。

A permutation group approach to a one dimensional Heisenberg open spin 12 chain with nearest neighbor interactions is studied.

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在研究这类问题时，常用的理论方法有转移矩阵法、组合解法、重整化群方法及图形展开法等。

The usual ways to study the subject are the transfer-matrix method, combination solution, the renormalization-group technique, and graphic expansion, and so forth.

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And so in the 1940s, a group of people led by Collier started to develop a large scale production method for making a reliable source of vaccinia virus.

在二十世纪四十年代,科利尔带领一群人开始研究,一种大规模的生产方法,这种方法能制得牛痘病毒的可靠来源

耶鲁公开课 - 生物医学工程探索课程节选