A temporary clamping structure for electronics includes a bracket fastened to a ceiling surface of the interior of a room, an electronic device body connected to the ceiling surface by screwing down to the bracket, fitting holes formed on the bracket side, and a fitting pawl provided on the electronic device body and fittable into the fitting holes. The dielectric filter 1 comprises excitation holes whose short-circuiting ends are provided with respective coupling-adjusting countersinks. The network circuits operate in a same radio frequency band and are collocated. The stored wave velocity parameters, related to different stimulating electrodes, are compared to each other in a comparison unit and the comparison is used to adapt a stimulation mode when stimulating the heart to optimize the hemodynamic performance of the heart.