Abstract: A daily electricity generation planning method of a cascade hydropower plants is disclosed, and the method is comprised of the steps as follows: step 1, regardless of the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as one of optimization objectives, and performing a first optimization to obtain a daily electricity generation plan; step 2, according to the derived daily electricity generation plan, determining an opening and closing status for the generator; and step 3, considering the constraints for opening and closing the generator, taking the power similarity between the power plant group and the typical demand as the optimization objective, performing a second optimization to obtain the daily electricity generation plan.

Abstract: A printed circuit board includes a first electrically conductive circuit pattern, a substrate layer, an adhesive sheet, and a second electrically conductive circuit pattern, which are arranged in the above described order. The printed circuit board includes a single layer electrically conductive circuit area. The adhesive sheet defines a first opening spatially corresponding to the single layer electrically conductive circuit area. The adhesive sheet includes a first inner sidewall surrounding the first opening. The second electrically conductive circuit pattern defines a second opening spatially corresponding to the single layer electrically conductive circuit area. The second electrically conductive circuit pattern includes a second inner sidewall surrounding the second opening. The first inner sidewall and the second inner sidewall are not completely coplanar.

Abstract: A streetlight system includes a plurality of streetlights, disaster warning systems positioned at each of the streetlights and a control center electrically connected with the disaster warning systems. The streetlights are positioned at roadways. Each of the disaster warning systems includes a control system and a broadcasting system. When the control center receives a disaster alert signal, the control center transmits information of disaster shelters and evacuating routes to control system, and the broadcasting system broadcasts information of the disaster shelters and the evacuating routes to people for leading people to escape.

Abstract: A printed circuit board includes a first electrically conductive circuit pattern, a substrate layer, an adhesive sheet, and a second electrically conductive circuit pattern, which are arranged in the above described order. The printed circuit board includes a single layer electrically conductive circuit area. The adhesive sheet defines a first opening spatially corresponding to the single layer electrically conductive circuit area. The adhesive sheet includes a first inner sidewall surrounding the first opening. The second electrically conductive circuit pattern defines a second opening spatially corresponding to the single layer electrically conductive circuit area. The second electrically conductive circuit pattern includes a second inner sidewall surrounding the second opening. The first inner sidewall and the second inner sidewall are not completely coplanar.

Abstract: A streetlight system includes a plurality of streetlights, disaster warning systems positioned at each of the streetlights and a control center electrically connected with the disaster warning systems. The streetlights are positioned at roadways. Each of the disaster warning systems includes a control system and a broadcasting system. When the control center receives a disaster alert signal, the control center transmits information of disaster shelters and evacuating routes to control system, and the broadcasting system broadcasts information of the disaster shelters and the evacuating routes to people for leading people to escape.