Abstract: A door access control system (9) includes a door lock (10) mounted to a door (435). A door lock controller (611) is mounted in the door (435) and is electrically connected to the door lock (10). A wireless charging device (511) is electrically connected to the door lock controller (611). A main control unit (659) is provided for operating the door lock controller (611). At least one passive door opening unit (673) is provided to conduct induction with the door lock controller (611) to unlock the door lock (10).

Abstract: A lock device with an electric locking function includes a latch head slideably mounted in a case and an unlatching mechanism mounted in the case. The unlatching mechanism includes a follower portion operatively connected to the latch head. The unlatching mechanism further includes a locking mechanism having an electric driving device for driving a locking block to move between a front position in which the unlatching mechanism is locked and a rear position in which the unlatching mechanism is not locked. Wire or wireless control can be provided to control a driving shaft of the electric driving device to move in a forward direction or a reverse direction to lock or unlock the latch head.

Abstract: A gas ring for a plasma system includes a gas ring body having a surface and an insulating protective layer covering the surface. Methods of manufacturing the gas ring are also provided.

Abstract: A door access control system (9) with a cloud function includes a door lock (10) mounted to a door (435). A door lock controller (611) is mounted in the door (435) and is electrically connected to the door lock (10). A wireless charging device (511) is electrically connected to the door lock controller (611). A main control unit (659) is provided for operating the door lock controller (611). The door access control system (9) further includes a cloud server (711) that can be connected to the door lock controller (611). The main control unit (659) can be connected to and log in the cloud server (711).

Abstract: A door access control system (9) includes a door lock (10) mounted to a door (435). A door lock controller (611) is mounted in the door (435) and is electrically connected to the door lock (10). A wireless charging device (511) is electrically connected to the door lock controller (611). A main control unit (659) is provided for operating the door lock controller (611). At least one passive door opening unit (673) is provided to conduct induction with the door lock controller (611) to unlock the door lock (10).

Abstract: A wideband high frequency bandpass filter is disclosed, which includes an open-circuit resonator structure and a short-circuit resonator structure. The open-circuit resonator has a signal transmission strip line and a T-shaped strip line. Both ends of the signal transmission strip line are bent toward to opposite ends of the T-shaped strip line respectively, so as to form gaps in the open-circuit resonator. The open-circuit resonator structure and the short-circuit resonator structure are coupled under the resonant mode, thereby achieving a bandpass filtering at 60 GHz.

Abstract: A wideband high frequency bandpass filter is disclosed, which includes an open-circuit resonator structure and a short-circuit resonator structure. The open-circuit resonator has a signal transmission strip line and a T-shaped strip line. Both ends of the signal transmission strip line are bent toward to opposite ends of the T-shaped strip line respectively, so as to form gaps in the open-circuit resonator. The open-circuit resonator structure and the short-circuit resonator structure are coupled under the resonant mode, thereby achieving a bandpass filtering at 60 GHz.

Abstract: A method for providing cloud computing service and a cloud computing service management system are proposed as a solution for achieving a PC-free computing environment that allows global computing users to perform information processing tasks without having to use personal computers (PC), and which is characterized by the use of modem units for the realization and implementation of a PC-free computing environment, wherein the modem units are connected via a communication system to a central host computer where a set of cloud computing resources are provided, so that any end user can gain access to and use the cloud computing resources on the central host computer simply by connecting a terminal device to the modem unit.

Abstract: A high frequency filter with a wider bandwidth is proposed based on an electromagnetic wave interacted with metamaterial following a left-handed rule and an electromagnetic wave interacted with traditional material following a right-handed rule, and the high frequency filter includes a plurality of filter units arranged in an array and disposed on the same plane, and each filter unit includes a first metal layer, a second metal layer and a dielectric layer, and the first metal layer and the second metal layer are stacked on two opposite sides of the dielectric layer respectively, and the filter is applicable to filtering wave with a frequency of 60 GHz.