通过对这种变换器的工作原理分析可知，主辅开关管都可以实现零电压或零电流开关，且电压、电流应力较小。
Through the operational principle it can be verified that all the switches are capable of achieving ZVS or ZCS condition, and the voltage and current stress are relatively low.
利用应力的坐标变换关系，推导出主应力与应力分量之间的微分关系，使主应力的精度计算更加简便。
By coordinate transformation of stress we have the differential relationship between the principal stresses and stress components to facilitate deviation calculation.
从岩土类材料极限应力状态线所致的各向异性出发，提出了应力空间变换的思想。
Based on the anisotropy induced by the critical stress line, the idea of transformation of stress space is presented.
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