Theories and technologies of live line measurement have appeared, including the interference method, the incremental method, the differential equation method and the integral equation method.

针对上述情况出现了很多带电测量输电线路零序互感参数的新的理论和技术，包括干扰法、增量法、微分法、积分法等。

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It also has its physical significance. Kepler equation is an integral of differential equation set. The introduction of assistant quantity E leads to the simplification of mathematic expression.

其物理意义，开普勒方程是关于行星运动微分方程组的一个积分，由于引入了辅助量E，使数学表达式大为简化。

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The integral differential equation solution technique is used.

采用了积分一微分方程求解技术。

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