Abstract: A wireless communication system for transmitting energy in ultrasonic waves, a host device, and a mobile device are provided. The wireless communication system includes at least one host device and at least one mobile device. The host device each includes an ultrasonic energy transmitter and a wireless communication receiver. The host device transmits an energy signal in ultrasonic waves through the ultrasonic energy transmitter. The mobile device each includes an ultrasonic energy receiver and a wireless communication transmitter. The mobile device receives the energy signal in ultrasonic waves through the ultrasonic energy receiver and drives the wireless communication transmitter through the energy signal to transmit a communication signal to a field, such that the host device located in the field receives the communication signal.

Abstract: A system for implementing a ride-sharing method includes a cloud server, a first terminal device in wireless connection with the cloud server, at least one second terminal device in wireless connection with the cloud server, a first helmet in wireless connection with the first terminal device, and a second helmet in wireless connection with the at least one second terminal device. The first terminal device generates a ride-sharing request and transmits the ride-sharing request to the cloud server. The cloud server transmits the ride-sharing request to the at least one second terminal device. The at least one second terminal device generates a ride-sharing confirmation and transmits the ride-sharing confirmation to the cloud server. The cloud server transmits the ride-sharing confirmation to the first terminal device. A user of the first terminal device selects one second terminal device to share a ride.

Abstract: A delivery address positioning method based on Internet of vehicles is provided. The method includes the steps as follows. Control a timing unit of the smart device to start timing when a real-time speed of the smart device is zero. Obtain a position information of the smart device from a GPS unit of the smart device and a registration information stored by a storage unit of the smart device when a time period timed by the timing unit is greater than a predefined time period. Transmit the position information and the registration information to the server. Search a database of the server according to the registration information. Determine whether the database includes at least one order matches with the registration information. And deliver the position information to a logistics center when the database includes at least one order matches with the registration information.

Abstract: A printed circuit board (PCB) includes a substrate, a pad, a plurality of connecting wires and a plurality of separating portions. The pad arranged on at least one surface of the substrate. The plurality of connecting wires increase contact area of the pad and a copper foil around the pad to keep the current of the PCB steady when a lot of current flow through the PCB. The plurality of separating portions located on between the pad and the copper foil around the pad to divide the pad and the copper foil to avoid short-circuit when the copper foil is etched.

Abstract: A printed circuit board (PCB) includes a substrate, a pad, a plurality of connecting wires and a plurality of separating portions. The pad arranged on at least one surface of the substrate. The plurality of connecting wires increase contact area of the pad and a copper foil around the pad to keep the current of the PCB steady when a lot of current flow through the PCB. The plurality of separating portions located on between the pad and the copper foil around the pad to divide the pad and the copper foil to avoid short-circuit when the copper foil is etched.