Abstract: Methods, devices, apparatus, and systems for wireless transmission and transmitting control are provided. In one aspect, a transmitting control device in a wireless transmission system is connected to an external video acquisition device such that video data acquired by the video acquisition device is obtained. According to an associated identification of a photographed object and the video data, video parameters of the photographed object are determined, and tracked and analyzed. According to an analysis result, a control instruction is generated to control the video acquisition device to acquire the video data, and the video data is transmitted to a receiving control device in the wireless transmission system. The receiving control device is configured to determine the associated identification of the photographed object, send the associated identification to the transmitting control device, and output the video data transmitted by the transmitting control device.

Abstract: A recommendation model training method includes: acquiring first preference information corresponding to users for a first object, the first object being an object on which the users have performed a designated operation; determining second preference information corresponding to users for a second object, the second object being an object on which the users have not performed a designated operation; correcting the first and second preference information based on preference features of users for an object and correlation features between objects and the users, to obtain third preference information of the users for the objects; generating training data based on the third preference information, a user attribute of a target user, an object attribute of a target object, and operation information of the target user for the target object; and performing iterative training on a target recommendation model based on the training data until a training condition is satisfied.

Abstract: Audio and video transmission device and audio and video transmission system are provided. The audio and video transmission system includes an audio and video transmission device and at least one wireless microphone transmitting device. Each of the at least one wireless microphone transmitting device is configured to send an audio signal acquired by a wireless microphone to the audio and video transmission device. The audio and video transmission device is configured to be respectively connected to the wireless microphone transmitting device and an external video acquisition device and configured to: receive the audio signal from the wireless microphone transmitting device and transmit the audio signal to the video acquisition device, obtain a mixture signal generated by the video acquisition device from the audio signal and a video signal, and process and output the mixture signal.

Abstract: Methods for controlling video data acquisition, apparatus and systems for wireless transmission are provided. In one aspect, a wireless transmission system includes a transmitting control device and a receiving control device that are wirelessly connected. The transmitting control device is configured to: obtain video data acquired by a video acquisition device externally connected to the transmitting control device, determine video parameters of a photographed object based on an associated identification of the photographed object and the video data, track and analyze the video parameters to generate a control instruction, control the video acquisition device to acquire the video data based on the control instruction, and transmit the video data to the receiving control device. The receiving control device is configured to: determine and send the associated identification of the photographed object to the transmitting control device, and output the video data transmitted by the transmitting control device.

Abstract: A transaction processing method includes: dividing a to-be-processed transaction obtained from a database into at least two subtransactions; dividing each subtransaction into N parts with an association relationship; processing the N parts of each subtransaction based on the association relationship, to obtain a processing result of a lastly executed part of the N parts; determining, upon detecting an abnormal subtransaction based on the processing result, a processing policy matching an abnormality reason of the abnormal subtransaction; and processing the abnormal subtransaction by using the processing policy, to obtain a final processing result of the to-be-processed transaction.

Abstract: A preparation method of a fully adaptive modified nanographene plugging type anti-collapse drilling fluid is disclosed. A modified nanographene slurry anti-collapse agent and a water-based drilling fluid containing the modified nanographene slurry anti-collapse agent are disclosed. The preparation method includes subjecting a nanographene and a mixed acid to a first contact to obtain a mixed liquid, dropwise adding potassium chlorate into the mixed liquid under the condition of ice-bath pan to carry out a modification treatment, so as to obtain a modified nanographene, and subjecting the modified nanographene to a second contact with water to prepare a modified nanographene slurry.

Abstract: An oil-based drilling fluid composition, includes a base fluid and a treating agent. The base fluid comprises a base oil and an inhibitor; the treating agent comprises an organic soil, a main emulsifier, an auxiliary emulsifier, a plugging agent, a weighting agent, a humectant, an alkaline regulator and a filtrate reducer. 5-25 parts by weight of the inhibitor, 5-12 parts by weight of the organic soil, 1-6 parts by weight of the main emulsifier, 2-8 parts by weight of the auxiliary emulsifier, 3-18 parts by weight of the plugging agent, 5-30 parts by weight of the weighting agent, 2-6 parts by weight of the humectant, 2-7 parts by weight of the alkaline regulator and 2-10 parts by weight of the filtrate reducer are used, based on 100 parts by weight of base oil.

Abstract: The present disclosure discloses an oil-based drilling fluid composition, including a base fluid and a treating agent, wherein the base fluid comprises a base oil and an inhibitor; the treating agent comprises an organic soil, a main emulsifier, an auxiliary emulsifier, a plugging agent, a weighting agent, a humectant, an alkaline regulator and a filtrate reducer; wherein 5-25 parts by weight of the inhibitor, 5-12 parts by weight of the organic soil, 1-6 parts by weight of the main emulsifier, 2-8 parts by weight of the auxiliary emulsifier, 3-18 parts by weight of the plugging agent, 5-30 parts by weight of the weighting agent, 2-6 parts by weight of the humectant, 2-7 parts by weight of the alkaline regulator and 2-10 parts by weight of the filtrate reducer are used, based on 100 parts by weight of base oil.

Abstract: A method of preparing a modified polyvinyl acetate includes subjecting a mixed liquor L1 containing a functional monomer to a first reaction with a first vinyl acetate monomer, followed by adding a first initiator to carry out a second reaction to obtain a mixed liquor L2; subjecting an acrylate monomer, a second vinyl acetate monomer, a second initiator and the mixed liquor L2 to carry out a third reaction to obtain a mixed liquor L3; and subjecting a third initiator and the mixed liquor L3 to carry out a fourth reaction under the air-tight and ultrasonic conditions. The functional monomer is selected from acrylic acid, oleic acid or butenedioic acid. Uses of modified polyvinyl acetate obtained by the method and oil-based drilling fluid containing the modified polyvinyl acetate are also disclosed.

Abstract: A transaction processing method includes: dividing a to-be-processed transaction obtained from a database into at least two subtransactions; dividing each subtransaction into N parts with an association relationship; processing the N parts of each subtransaction based on the association relationship, to obtain a processing result of a lastly executed part of the N parts; determining, upon detecting an abnormal subtransaction based on the processing result, a processing policy matching an abnormality reason of the abnormal subtransaction; and processing the abnormal subtransaction by using the processing policy, to obtain a final processing result of the to-be-processed transaction.

Abstract: The invention discloses a method and system for obtaining an evaluation model and an evaluation method and system for the plugging performance of drilling fluid. The method for obtaining the evaluation model comprises: applying a confining pressure to a holding device where a preset fracture model is located, wherein a displacement differential pressure of two ends of the holding device is a preset displacement differential pressure; measuring a flow of standard measuring fluid flowing through the preset fracture model under different confining pressures, wherein the different confining pressures gradually increase according to a first preset rule; and controlling to stop increasing the confining pressure when the flow of the standard measuring fluid flowing through the preset fracture model reaches a preset flow so as to compress the preset fracture model into the evaluation model at a micro-nano level.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a compressed video signal and a data signal. A power source can be sent over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a first signal corresponding to a frequency different from a frequency of a second signal. A power source can be sent over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a compressed video signal and a data signal. A power source can be sent over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a first signal corresponding to a frequency different from a frequency of a second signal. A power source can be sent over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a first signal corresponding to a first frequency and a second signal corresponding to a second frequency. A power and ground can be send over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that include signal processing circuitry, an HDMI port, and a multi-position multi-contact port. The signal processing circuitry can transmit and receive signals over the multi-position multi-contact port. The signals can include a first signal corresponding to a first frequency and a second signal corresponding to a second frequency. A power and ground can be send over a cable attached to the multi-position multi-contact port.

Abstract: Disclosed are various embodiments of transmit and receive connectivity devices that receive a media signal from a source device coupled to the HDMI port and to convert the media signal to a converged media signal based on a converged signal specification. The converged media signal can be transmitted between the transmit and receive connectivity devices through a multi-position multi-contact port. The converged media signal can be converted to a media signal based on the converged signal specification. The converted media signal can be output to a sink device via an HDMI port.