Abstract: An inverted F-shaped single-band antenna structure includes a ground terminal, an impedance-matching terminal, a radiation terminal, and a signal feed-in terminal. The ground terminal includes a body. The impedance-matching terminal is bent and extended from the body, and is connected perpendicularly to the body. The radiation terminal is bent and extended from the impedance-matching terminal, and is connected perpendicularly to the impedance-matching terminal, and is arranged correspondingly with the body. The signal feed-in terminal is bent and extended from the radiation terminal, and connected perpendicularly to the radiation terminal, and arranged correspondingly with the impedance-matching terminal, and not connected to the body.

Abstract: A dual-band antenna structure includes a ground terminal, an impedance-matching terminal, a radiation terminal, and a signal feed-in terminal. The ground terminal includes a body. The impedance-matching terminal is bent and extended from one side of the body, and connected perpendicularly to the body. The radiation terminal is bent and extended from one side of the impedance-matching terminal, and connected perpendicularly to the impedance-matching terminal. The signal feed-in terminal is bent and extended from one side of the radiation terminal, and connected perpendicularly to the radiation terminal, and connected to the impedance-matching terminal on a same side, and not connected to the ground terminal. A length of the impedance-matching terminal is shortened to increase an area of the radiation terminal and shorten a distance between the ground terminal and the radiation terminal, so the inverted F-shaped antenna structure is arranged inside electronic apparatuses with limited height and space.

Abstract: A single-band antenna structure includes a ground terminal, an impedance-matching terminal, a radiation terminal, and a signal feed-in terminal. The ground terminal includes a body. The impedance-matching terminal is bent and extended from the body, and connected perpendicularly to the body. The radiation terminal is square, and bent and extended from the impedance-matching terminal, and connected perpendicularly to the impedance-matching terminal, and arranged correspondingly with the body. The signal feed-in terminal is bent and extended from the radiation terminal, and connected perpendicularly to the radiation terminal, and connected to the impedance-matching terminal on a same side, and not connected to the ground terminal.

Abstract: An antenna connecting-switching apparatus includes a housing, a first connection structure, a second connection structure, an elastic body, an elastic piece structure and an electronic switch. The elastic piece structure includes a first elastic piece and a second elastic piece. When an external antenna is connected to the first connection structure, the first connection structure compresses the elastic body pushing the first elastic piece; the first elastic piece contacts the second elastic piece; the electronic switch is switched; a wireless communication circuit is electrically connected to the external antenna. When the external antenna stops connected to the first connection structure, the elastic body rebounds pushing the first connection structure; the first connection structure stops pushing the first elastic piece; the first elastic piece stops contacting the second elastic piece; the electronic switch is switched; the wireless communication circuit is electrically connected to an internal antenna.

Abstract: A dual polarization log-periodic antenna apparatus includes a log-periodic antenna and a conical reflector. The conical reflector is arranged below the log-periodic antenna. The log-periodic antenna is configured to transmit a plurality of radio waves. The conical reflector is configured to reflect the radio waves transmitted by the log-periodic antenna.

Abstract: A dual polarization log-periodic antenna apparatus includes a log-periodic antenna and a conical reflector. The conical reflector is arranged below the log-periodic antenna. The log-periodic antenna is configured to transmit a plurality of radio waves. The conical reflector is configured to reflect the radio waves transmitted by the log-periodic antenna.

Abstract: A screw hole position detecting apparatus is applied to a board body and at least one screw. The board body defines at least one screw hole. The screw hole position detecting apparatus includes a microprocessor, a lamp group and a camera. The lamp group is configured to illuminate the board body. The camera is configured to photograph the board body to obtain an original image and transmit the original image to the microprocessor. The microprocessor is configured to grayscale convert the original image into a grayscale image, and to convert the grayscale image into a binarization image based on a threshold value. Based on the binarization image, whether the at least one screw hole is locked into the at least one screw is determined.

Abstract: An antenna connecting-switching apparatus includes a housing, a first connection structure, a second connection structure, an elastic body, an elastic piece structure and an electronic switch. The elastic piece structure includes a first elastic piece and a second elastic piece. When an external antenna is connected to the first connection structure, the first connection structure compresses the elastic body pushing the first elastic piece; the first elastic piece contacts the second elastic piece; the electronic switch is switched; a wireless communication circuit is electrically connected to the external antenna. When the external antenna stops connected to the first connection structure, the elastic body rebounds pushing the first connection structure; the first connection structure stops pushing the first elastic piece; the first elastic piece stops contacting the second elastic piece; the electronic switch is switched; the wireless communication circuit is electrically connected to an internal antenna.

Abstract: A model parameters security protection method is implemented in a computing device in communication connection with at least one security protection device. The method includes training a data model based on an artificial neural network using a number of images and obtaining parameter information of the data model, encrypting the parameter information and generating a configuration file comprising the encrypted parameter information, and sending the configuration file to the at least one security protection device. The parameter information includes at least one of a weight of neuron and an offset value of the neuron of the artificial neural network.

Abstract: An antenna board alignment method includes following steps: A microprocessor finds a central positioning point on an antenna board to locate a positioning rectangle. The microprocessor finds four inner positioning points on the positioning rectangle to locate the antenna board. The microprocessor finds a plurality of outer positioning points at a plurality of edge locations on the antenna board to locate at least one edge of the antenna board.

Abstract: A model parameters security protection method is implemented in a computing device in communication connection with at least one security protection device. The method includes training a data model based on an artificial neural network using a number of images and obtaining parameter information of the data model, encrypting the parameter information and generating a configuration file comprising the encrypted parameter information, and sending the configuration file to the at least one security protection device. The parameter information includes at least one of a weight of neuron and an offset value of the neuron of the artificial neural network.