The present invention provides methods of stabilizing subterranean formations and methods of reducing the production of particulates from subterranean formations, which are useful in conjunction with subterranean formations surrounding wellbores and fractures. The numerical controller is also capable of performing auxiliary function, spindle function and tool wearing compensation function, and further changing a position of starting the path table operation of the controlled axis. More preferably, a gel layer supported by a hydrophilic porous membrane 2 is coated with hydrophilic porous membranes 3 and 4. The magnetic materials are disposed adjacent to the coil structure and corresponding to the winding groups.