Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.

利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。

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The on-line pipe flaw detector with magnetic leakage flux principle is introduced, providing details regarding the exciter circuit structure, magnetic sensors and signal processing.

介绍了基于漏磁探伤原理的钢管管缝在线检测装置，对装置的励磁磁路结构、磁敏感检测元件及其信号处理作了较详细的分析论述。

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Magnetic flux leakage (MFL) internal inspection technology is most widely used in many on-line oil-gas pipeline inspections.

在多种油气输送管道内检测技术中，漏磁内检测技术应用最为广泛。

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