N the permeability of free space, which has the value 4π × 10–7 henry per metre 磁性常数; 真空之散透性 ( symbol: MAlso called absolute permeability)
The principle and approach of constant magnetic measurement for diameter of coiled tubing is introduced, and an instrument for the measurement is designed.
介绍了连续油管直径恒磁测量原理及方法，给出了测量装置的构成和实验数据，分析了其测量精度。
The electromagnetic loss property was studied by the relative dielectric constant and relative magnetic permeability of the ferrites.
并测试样品的相对介电常数和相对磁导率，研究了它们的电磁损耗特性。
To calibrate and compensate the compass error of magnetic heading in a carrier with constant pitch Angle, the deviation compensation algorithm (DCA) for magnetic deviation compensation is put forward.
针对具有恒定俯仰角度载体的磁航向罗差标定和补偿问题，提出了一种用于磁罗差修正的偏差补偿算法(DCA)。
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