The coupling interaction between urban land reserve and urban operation has promoted the development of cities,but the interaction mechanism isn t perfect,the coupling relationship needing to be improve.

Stationary numerical simulation on coupling interaction between TIG welding arc and pool;

Factors that affect the mutual inductance coupling have been studied based on this model, including magnetic core material, position of the primary winding, winding method of the secondary winding and its position.

Because the equivalent parasitic parameters of the capacitance and inductance of the EMI filter may affect EMI performance under highfrequency conditions,the mutual inductance coupling between equivalent parasitic parameters of highfrequency apparatus is used to improve the highfrequency performance of t.

Based on the principle of mutual inductance coupling,this system adopts to the techniques such as DDS and realized the accurate testing of the quality parameters of electronic labels.