非线性分析的方法，除采用一般的变刚度法之外，还采用了改进的BFGS法。
In the methods of nonlinear analysis, along with the normal variable stiffness methods, the improved BFGS method is used.
除强度条件外，环境刚度条件是发震的另一必要条件。
Besides the strength condition, the environmental stiffness condition is another one necessary for shock-generation.
除弹性理论法外，其它常用的设计和分析方法几乎都没有考虑筏板刚度对下卧层沉降的调节作用。
The raft rigidity directly affected by the dimensions of the board, however, were neglected in the traditional analyzing of substratum settlement except of the elasticity theory method.
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