master drum sender

One is by measuring the magnetic reluctance of the gap between the wire and the pole shoe in the radial or longitudinal magnetic circuit along the wire, and the other is by measuring the main magnetic flux of the total magnetic flux through the wire in the longitudinal magnetic circuit.

介紹錄井鋼絲直徑的恒磁測量原理，包括沿鋼絲徑向和軸向的磁阻測量方法、沿鋼絲軸向的主磁通測量方法，它們均可應用于表面受油泥或其他非導磁材料覆蓋鋼絲的在線連續測

According to the structure of a electromagnetic gear couple,this research paper analyzed the main magnetic circuit as well as derived the calculation formulas for its uneven working and assembling airgap magnetic conduction.

根據電磁齒輪的結構特點,分析了電磁齒輪傳動的主磁路,并推導出非均勻的工作氣隙磁場與裝配氣隙磁場磁導的計算公式。

Modeling the main geomagnetic field is a kind of all-around research work,concerning with the research on the main geomagnetic filed theory,magnetic survey,data reduction,model expression,and model interpretation and application.

主磁場建模是一項綜合性的研究工作,它涉及主磁場理論、磁場測量、數據同化、模型表達、模型解釋以及模型運用等多方面的研究。

The energy density spectrum and secular variation of the Earth s main magnetic field on the surface of the earth during 1690～2000 were calculated and analyzed according to the models of Jeremy Bloxham and Andrew Jackson and the eighth generation of International Geomagnetic Reference Field(IGRF).

根據BJ地磁場模型和第 8代國際地磁參考場 (IGRF)模型 ,計算并分析了 16 90～ 2 0 0 0年期間地球表面主磁場和分量的能量密度譜及其長期變化 。