Abstract: An on-line measurement-error correction device and method for the inner profile of a special-shaped shell, including a fixing device. A vertical moving device is fixed at the top of the fixing device and connected with a horizontal moving device connected with a distance monitoring device, which is movable vertically and horizontally under the drive of the vertical and horizontal moving devices. The distance monitoring device includes a displacement monitoring element fixedly arranged on a fixing support hinged with an electric push rod configured to displace to drive the displacement monitoring element to deflect so as to change a monitoring direction. The displacement monitoring element is driven to deflect by the electric push rod of the distance monitoring device to change a monitoring direction, and a distance between each longitudinal section surface point on the inner surface of the special-shaped shell and the displacement monitoring element can be gradually measured.

Abstract: Provided is a liquid sample sampling device used in an operation, and belongs to the technical field of sampling devices. The sampling device includes a negative pressure suction head, an auxiliary tube connected with a side wall of the negative pressure suction head, and a sampling bottle connected with the auxiliary tube. A rebound connecting plate is arranged at a position connecting the negative suction head and the auxiliary tube. The side wall of the negative pressure suction head is provided with a push switch. A diameter of the auxiliary tube is larger than a diameter of the negative pressure suction head. The push switch is an elastic membrane switch.

Abstract: Disclosed in this application are a method for embedding a watermark in video data and apparatus, a method for extracting a watermark in video data and apparatus, a device, and a storage medium. The method for embedding the watermark includes: acquiring a target image frame in video data; performing time-frequency transformation on the target image frame to obtain target frequency domain data, the target frequency domain data comprising a matrix formed by frequency domain coefficients; changing the frequency domain coefficients in the target frequency domain data according to watermark data to obtain watermarked frequency domain data; performing inverse time-frequency transformation on the watermarked frequency domain data to obtain a watermarked image frame; and synthesizing watermarked video data according to the watermarked image frame.

Abstract: The present disclosure discloses an automatic recharge system and method, and a server, and belongs to a field of online recharge. The system includes: an agent server end on which an automatic recharge program runs, a third-party platform server, and at least one provider server, each provider server providing at least one online recharge service; the third-party platform server generates at least one order and stores the order; the agent server end logs in the third-party platform server by using the automatic recharge program and obtains the order; and the agent server end sends a recharge parameter corresponding to the order to the provider server by using the automatic recharge program, so as to complete an online recharge process corresponding to the order.

Abstract: The present disclosure discloses an automatic recharge system and method, and a server, and belongs to a field of online recharge. The system includes: an agent server end on which an automatic recharge program runs, a third-party platform server, and at least one provider server, each provider server providing at least one online recharge service; the third-party platform server generates at least one order and stores the order; the agent server end logs in the third-party platform server by using the automatic recharge program and obtains the order; and the agent server end sends a recharge parameter corresponding to the order to the provider server by using the automatic recharge program, so as to complete an online recharge process corresponding to the order.