By coordinate transformation of stress we have the differential relationship between the principal stresses and stress components to facilitate deviation calculation.
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。
The scheme accomplishes range tracking by adopting three range gate tracking to make middle gate always centered at echo pulse center through feedback circuit and deviation calculation circuit.
该方案采用三波门跟踪，通过偏差计算电路和反馈控制电路使中间波门中心始终对准目标回波脉冲中心，完成距离跟踪。
The results of calculation show that the influence of parametric deviation cannot be ignored.
计算结果表明：参数偏差的影响不能忽略。
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