Abstract: Embodiments of the present disclosure provide a display module, including: a flexible panel, a first group of film layers attached to a light-emitting side of the flexible panel, and a second group of film layers attached to a non-light-emitting side of the flexible panel away from the light-emitting side. The display module is capable of being folded to a curved plate, such that at least a portion of an orthographic projection of the display module on a first plane perpendicular to the curved plate has a shape of a water-drop profile comprising a neck portion and a body portion. At least a portion of orthographic projections, on the first plane, of two opposite ends of the display module forms the neck portion, and an orthographic projection, on the first plane, of a middle portion of the display module between the two opposite ends forms the body portion.

Abstract: Disclosed is a wireless monitoring system for a coal-gangue mixing ratio based on a non-Hermite technology, including a signal generation monitoring device, an excitation coil, a receiving coil and a parallel plate capacitor. The signal generation monitoring device is connected with the excitation coil; the receiving coil is connected with the parallel plate capacitor to form an LC resonance system; the receiving coil is placed in parallel with the excitation coil, and the axis of the receiving coil and the axis of the excitation coil are on a same horizontal line; the signal generation monitoring device is used to generate a pulse current and collect reflected signals; the excitation coil excites an initial magnetic field based on the generated pulse current, and the LC resonance circuit performs an electromagnetic field induction to generate an induced magnetic field, and feeds back the reflected signals to the signal generation monitoring device.

Abstract: Disclosed is a wireless monitoring system for a coal-gangue mixing ratio based on a non-Hermite technology, including a signal generation monitoring device, an excitation coil, a receiving coil and a parallel plate capacitor. The signal generation monitoring device is connected with the excitation coil; the receiving coil is connected with the parallel plate capacitor to form an LC resonance system; the receiving coil is placed in parallel with the excitation coil, and the axis of the receiving coil and the axis of the excitation coil are on a same horizontal line; the signal generation monitoring device is used to generate a pulse current and collect reflected signals; the excitation coil excites an initial magnetic field based on the generated pulse current, and the LC resonance circuit performs an electromagnetic field induction to generate an induced magnetic field, and feeds back the reflected signals to the signal generation monitoring device.