On the basis of the reliability and hazard-benefit theory, the residual service life of existing structure can be given taking into account the safe reliability and economic optimization.
基于可靠性理论和风险-效益理论，以安全可靠指标以及经济优化为控制条件，即结构在满足安全可靠指标的情况下获得的净效益最大，计算既有结构的优化剩余使用寿命；
Therefore it must be taken into account from the coil strength, mechanical strength, heat resistance and conversion efficiency etc, for the optimization of the coils 'structure and parameters.
因此，必须从线圈的绝缘强度、机械强度、耐热性能、转换效率等方面综合考虑，进行线圈结构参数优化。
Therefore it must be taken into account from the coil strength, mechanical strength, heat resistance and conversion efficiency etc, for the optimization of the coils 'structure and parameters.
因此，必须从线圈的绝缘强度、机械强度、耐热性能、转换效率等方面综合考虑，进行线圈结构参数优化。
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