Abstract: The present disclosure provides a pump body assembly, a heat exchange apparatus, a fluid machine and an operating method thereof. The pump body assembly includes a piston, a shaft, a piston sheath, and a cylinder. The shaft drives the piston to rotate and reciprocate within the piston sheath while rotating. The piston sheath is located in the cylinder, and a compression chamber is defined between an outer circumferential wall of the piston and an inner wall of the cylinder. A pressure relief recess is defined in the outer circumferential wall of the piston or the inner wall of the cylinder at a position corresponding to the compression chamber.

Abstract: A power consumption control device includes: a voltage detection circuit configured to detect whether an input power supply of a magnetic levitation system to be controlled is turned off; and a comparison unit configured to detect an operating parameter of a motor of the magnetic levitation system during an operation of the motor as a generator, and compare the operating parameter with a set parameter to obtain a comparison result; a motor controller of the magnetic levitation system controls the motor of the magnetic levitation system to operate as the generator in a case that the input power supply is turned off, a bearing controller of the magnetic levitation system adjusts a magnitude of a bearing bias current of the magnetic levitation system according to the comparison result, to control a power consumption of a magnetic levitation bearing of the magnetic levitation system within a set range.

Abstract: A display panel and a display device. The display panel includes sub-pixels, a driving circuit for driving at least a part of the sub-pixels, and a signal line connecting the sub-pixel and the driving circuit, the driving circuit is located on a side of the sub-pixel in a first direction, the signal line includes an extension segment extending along the first direction, a plurality of extension segments of a plurality of signal lines are arranged side by side along a second direction, and the first direction intersects the second direction. The display panel includes a plurality of region segments arranged side by side along the second direction, the plurality of region segments include at least two adjacent first region segment and second region segment.

Abstract: A rolling curtain mounting housing and an electric rolling curtain are provided. The rolling curtain mounting housing includes a housing body, the housing body is disposed with an accumulator compartment, the accumulator compartment is disposed with an accumulator placement opening. The rolling curtain mounting housing is further disposed with a cover plate, the cover plate is configured to close the accumulator placement opening. The housing body includes an accumulator installation part and a housing extension part connected with each other, the housing extension extends outwards relative to the accumulator installation part, the accumulator installation part is disposed with the accumulator compartment. The cover plate further covers a side surface of the housing extension part on a same side as the accumulator placement opening when the cover plate closes the accumulator placement opening. The provided electric rolling curtain is more convenient to replace the accumulator.

Abstract: A method and device for controlling a distributed direct current power supply system are provided in embodiments of this disclosure. The method includes: acquiring a direct current busbar current of the distributed direct current power supply system; acquiring, according to the direct current busbar current and a rated capacity of a power conversion unit in the distributed direct current power supply system, a quantity of power conversion units that meets a power requirement of a load; and adjusting, according to the quantity of power conversion units, power conversion units that are turned on in the distributed direct current power supply system. The device is used to implement the method.

Abstract: A method of identifying a level of doneness of food includes: obtaining an initial food detection image; obtaining a current food detection image; performing a differential fusion operation on the initial food detection image and the current food detection image to obtain a fused food detection image; and inputting the fused food detection image into a predetermined neural network model to obtain the level of doneness of food output by the predetermined neural network model. According to the method, the differential image fusion is performed to reduce an influence on determining the level of doneness of food caused by the initial food detection image, and costs of the device may be reduced.

Abstract: A telescopic curtain guide rail includes an inner rail, an outer rail and a transmission unit. The inner rail is embedded in the outer rail, the transmission unit includes a driving wheel connected with a motor, a driven wheel, two fixed pulleys and a conveyor belt. The driving wheel and the driven wheel are located at two ends of the curtain guide rail, the two fixed pulleys are respectively located at other ends of the inner rail and outer rail. The driving wheel and one fixed pulley are located at two ends of the inner rail or outer rail, the conveyor belt is wound on the driving wheel, the driven wheel and the two fixed pulleys. A telescopic operation of the curtain guide rail can change positions of the two fixed pulleys simultaneously, and the curtain guide rail is simple to use and has a small occupied area.

Abstract: The embodiments of the present disclosure disclose a method and an apparatus for determining the permeability of the reservoir. The method comprises: acquiring logging data corresponding to the two zones at least; determining the permeability of a specified zone in the two zones at least based on logging data corresponding to the specified zone, wherein the specified zone represents any one of the two zones at least; setting weight values corresponding to the at least two zones respectively; and determining the permeability of the reservoir based on the weight values and the permeability respectively corresponding to the two zones at least. The technical solutions provided by the embodiments of the present disclosure can improve the accuracy of the determined permeability of the reservoir.

Abstract: A method and device for controlling a distributed direct current power supply system are provided in embodiments of this disclosure. The method includes: acquiring a direct current busbar current of the distributed direct current power supply system; acquiring, according to the direct current busbar current and a rated capacity of a power conversion unit in the distributed direct current power supply system, a quantity of power conversion units that meets a power requirement of a load; and adjusting, according to the quantity of power conversion units, power conversion units that are turned on in the distributed direct current power supply system. The device is used to implement the method.

Abstract: A method and an apparatus for automatically extracting image features of electrical imaging well logging, wherein the method comprises the steps of: acquiring historical data of electrical imaging well logging; pre-processing the historical data of the electrical imaging well logging to generate an electrical imaging well logging image covering a full hole; recognizing and marking a typical geological feature in the electrical imaging well logging image covering the full hole, obtaining a processed image, and determining the processed image as a training sample according to types of the geological features; constructing a deep learning model including an input layer, a plurality of hidden layers, and an output layer; training the deep learning model using the training sample; using the trained deep learning model, recognizing type of a geological feature of an electrical imaging well logging image of a well section to be recognized, and performing morphological optimization processing on the recognition resul

Abstract: A method and an apparatus for automatically recognizing an electrical imaging well logging facies, wherein the method comprises: acquiring historical data of electrical imaging well logging; pre-processing the historical data of the electrical imaging well logging to generate an electrical imaging well logging image covering a full hole; recognizing a typical imaging well logging facies in the electrical imaging well logging image covering the full hole, and determining the electrical imaging well logging image covering the full hole as a training sample in accordance with a category of the imaging well logging facies; constructing a deep learning model including an input layer, a plurality of hidden layers, and an output layer; training the deep learning model using the training sample to obtain a trained deep learning model; and recognizing the well logging facies of the electrical imaging well logging image of the well section to be recognized using the trained deep learning model.

Abstract: A method and an apparatus for automatically extracting image features of electrical imaging well logging, wherein the method comprises the steps of: acquiring historical data of electrical imaging well logging; pre-processing the historical data of the electrical imaging well logging to generate an electrical imaging well logging image covering a full hole; recognizing and marking a typical geological feature in the electrical imaging well logging image covering the full hole, obtaining a processed image, and determining the processed image as a training sample according to types of the geological features; constructing a deep learning model including an input layer, a plurality of hidden layers, and an output layer; training the deep learning model using the training sample; using the trained deep learning model, recognizing type of a geological feature of an electrical imaging well logging image of a well section to be recognized, and performing morphological optimization processing on the recognition resul

Abstract: A method and an apparatus for automatically recognizing an electrical imaging well logging facies, wherein the method comprises: acquiring historical data of electrical imaging well logging; pre-processing the historical data of the electrical imaging well logging to generate an electrical imaging well logging image covering a full hole; recognizing a typical imaging well logging facies in the electrical imaging well logging image covering the full hole, and determining the electrical imaging well logging image covering the full hole as a training sample in accordance with a category of the imaging well logging facies; constructing a deep learning model including an input layer, a plurality of hidden layers, and an output layer; training the deep learning model using the training sample to obtain a trained deep learning model; and recognizing the well logging facies of the electrical imaging well logging image of the well section to be recognized using the trained deep learning model.

Abstract: The present disclosure discloses a lens shielding mechanism, a lens shielding method and a head-mounted display using the lens shielding mechanism. The lens shielding mechanism is used for shielding an area exposed from a front housing (21) due to leftward and rightward movements of a lens (22). The lens shielding mechanism comprises: a group of shielding sheets (23) having a certain width. The group of shielding sheets (23) is arranged on left and right sides of the lens (22) and is fixedly connected to the lens (22). When the lens (22) moves leftwardly and rightwardly, the lens drives the group of shielding sheets (23) to move, and an area exposed from the front housing (21) due to the leftward and rightward movements of the lens (22) is shielded by the group of shielding sheets (23). The lens shielding mechanism has a good shielding effect and a simple structure, and occupies a small space.

Abstract: A driving assembly is provided. The driving assembly includes a fixed member, a movable member, a driving magnet unit, a coil, and a focusing magnetic element. The movable member is arranged to be movable relative to the fixed member in a main axis via a magnetic force generated by the coil and the driving magnet unit. Additionally, the resonance of the movable member is inhibited by a magnetic force generated by the focusing magnetic element and the driving magnet unit.

Abstract: The embodiments of the present disclosure disclose a method and an apparatus for determining the permeability of the reservoir. The method comprises: acquiring logging data corresponding to the two zones at least; determining the permeability of a specified zone in the two zones at least based on logging data corresponding to the specified zone, wherein the specified zone represents any one of the two zones at least; setting weight values corresponding to the at least two zones respectively; and determining the permeability of the reservoir based on the weight values and the permeability respectively corresponding to the two zones at least. The technical solutions provided by the embodiments of the present disclosure can improve the accuracy of the determined permeability of the reservoir.

Abstract: The present disclosure discloses a lens shielding mechanism, a lens shielding method and a head-mounted display using the lens shielding mechanism. The lens shielding mechanism is used for shielding an area exposed from a front housing (21) due to leftward and rightward movements of a lens (22). The lens shielding mechanism comprises: a group of shielding sheets (23) having a certain width. The group of shielding sheets (23) is arranged on left and right sides of the lens (22) and is fixedly connected to the lens (22). When the lens (22) moves leftwardly and rightwardly, the lens drives the group of shielding sheets (23) to move, and an area exposed from the front housing (21) due to the leftward and rightward movements of the lens (22) is shielded by the group of shielding sheets (23). The lens shielding mechanism has a good shielding effect and a simple structure, and occupies a small space.

Abstract: The invention relates to a rotary assembly (1) comprising two spaced-apart support members (5a, 5b). A shaft (7) is connected with respective ends to each support member (5a, 5b) via an engagement part (12), and a rotary element (4) having a through hole extending around the shaft so as to be supported on said shaft between support members (5a, 5b). The shaft comprises a flexible wire-like elongate body (6) that is connected to the support members (5a, 5b) under axial tension. The shaft is connected to the support members (5a,5b) in a nonrotating manner, the through hole being of larger diameter than a shaft diameter so that the rotary element (4) is rotatably supported on said shaft (7).

Abstract: A driving assembly is provided. The driving assembly includes a fixed member, a movable member, a driving magnet unit, a coil, and a focusing magnetic element. The movable member is arranged to be movable relative to the fixed member in a main axis via a magnetic force generated by the coil and the driving magnet unit. Additionally, the resonance of the movable member is inhibited by a magnetic force generated by the focusing magnetic element and the driving magnet unit.

Abstract: A connector assembly (200) comprising a body (203) having two U-shaped sections (201,202) each section having two opposed arms (204,205) having a hole (207,208) and a locking device (209,210) having an elongate locking member (215,216) extending through the holes of each arm. A first and second latching member (212,213) are attached to each respective end of the locking member (215, 216) abutting against an outward surface of the respective arm (204,205). The locking member comprises a first elongate body (215) having a first diameter attached with one end to the first latching member (213), and a second elongate body (216) that is connected to the first elongate body (215) movably along a longitudinal axis (L). The second elongate body (216) comprises a second diameter being smaller than the diameter of the first elongate body and being attached with one end to the second latching member (212).