Abstract: A deep well grounding electrode and a deep well grounding electrode monitoring system. The deep well grounding electrode comprises a feeding rod, a feeding head, a steel casing, a temperature measurement optical cable, an exhaust pipe, and a drainage cable; the steel casing is located in the well body; the feeding head is located at the bottom of the steel casing; the feeding rod, the temperature measurement optical cable, the exhaust pipe, and the drainage cable are located in the steel casing; the temperature measurement optical cable extends from a bottom end of the feeding rod to a monitoring module; the exhaust pipe extends from the bottom end of the feeding rod to the ground; and one end of the drainage cable is welded on the feeding rod, the other end extends to the monitoring module, and the drainage cable is fixed to the feeding rod by bolts.

Abstract: The disclosed technology is related to an electronic paper display and a displaying method. The electronic paper display device comprises an upper substrate with a first conductive layer formed thereon, a lower substrate with a second conductive layer formed thereon, and an electronic ink layer disposed between the first conductive layer of the upper substrate and the second conductive layer of the lower substrate and comprising microcapsules arranged therein. A fluorescent material is further disposed between the upper substrate and the lower substrate, and in the region between the upper substrate and the lower substrate where it is capable of receiving irradiation of ambient light.

Abstract: A digital camera includes: a battery installation part connectable to either an AC adapter or a battery; a mechanical shutter and a diaphragm; and a controller for supplying, to the mechanical shutter and the diaphragm, power from the AC adapter or battery that is connected to the battery installation part. The controller monitors a voltage output through the battery installation part during the power supply to the mechanical shutter and the diaphragm, and determines whether or not the AC adapter is connected to the battery installation part in accordance with the behavior of the monitored voltage changes.