Abstract: The invention discloses an experimental system and a method for wellbore pressure testing under the coexistence of gas-kick and loss-circulation, comprising a drill string simulator, a wellbore simulator and a complex stratigraphic structure simulator communicated in sequence from top to bottom; further comprising a medium return pipeline for collecting the returning test liquid and a medium leakage module for collecting the leaking test liquid; further comprising a data acquisition system for collecting data during testing. In the present invention, the experimental system has a simple structure, and the experimental method can comprehensively cover the three stages of circulating, well shut-in and well killing during the occurrence of coexistence of gas-kick and loss-circulation, multiple groups of experiments can be conducted by changing a single variable at the same stage, thus making the experimental test results applicable to all stages of wellbore pressure control in drilling operation.

Abstract: The present application provides a fastening clamp, used for connecting a first component to a second component having a connecting post.

Abstract: An anti-rollover apparatus and control method for heavy-duty vehicles with a pneumatic brake system includes an anti-yaw module, an anti-roll module, an electronic control unit (ECU) (10), a yaw velocity sensor (12), and a vehicle roll angle sensor (18). The ECU (10) controls solenoid valves (4, 9, 11, 19, and 24) to achieve braking of part of wheels to obtain anti-yaw torques and improve the yaw stability of the heavy-duty vehicles. The ECU (10) controls gas switch valves (21 and 22) to spray high-pressure gases recovered in brake chambers (1, 13, 16, and 26) out, anti-roll torques are obtained through the jet reactive force, and the roll stability of the heavy-duty vehicles is improved.

Abstract: The display apparatus of the electronic device includes: a pixel definition layer, an anode layer, a first transparent conductive layer and a driving circuit layer stacked sequentially, the pixel definition layer includes a first pixel definition region, and at least one first pixel unit is formed in the first pixel definition region, and each of the at least one first pixel unit includes a subpixel; the anode layer includes transparent anodes, and each of the transparent anodes is connected to one subpixel; the driving circuit layer is provided with first driving units in a region of the driving circuit layer not corresponding to the first pixel definition region; the first transparent conductive layer is formed with curved transparent conducting circuits; and each of the transparent anodes is electrically connected to one of the first driving units through one of the transparent conducting circuits.

Abstract: A condenser, an air conditioner outdoor unit, and an air-conditioning system. The condenser includes at least one row of heat exchange tubes and a plurality of fins arranged along the heat exchange tubes, where any fin is provided with at least one column of through holes, which correspond to the number of rows of the heat exchange tubes, for the heat exchange tubes to pass through; the fins are evenly divided, in the width direction, into at least one basic unit corresponding to the number of rows of the heat exchange tubes; the width of any basic unit is greater than 18.2 mm; and the center distance between two adjacent through holes from among any column of through holes is less than 21 mm. As a result, the heat exchange efficiency can be improved, and the energy efficiency can also be improved.

Abstract: A jet flow adjustment method for rotary steerable downhole release relates to a technical field of downhole drilling equipment for oil wells, which includes steps of: defining a diversion ratio p of a jet nozzle (2) by a ground control system according to a cleaning requirement of a cuttings bed; and sending the diversion ratio p of the jet nozzle (2) to a control unit of a downhole rotary steerable system; and determining an opening area s of the jet nozzle (2) by the control unit of the downhole rotary steerable system according to the diversion ratio p of the jet nozzle (2) and an equivalent channel area S of a drilling tool, wherein a calculation formula is: s=p*S/(1?p); controlling an adjustable bypass valve (3) by the control unit of the downhole rotary steerable system according to the calculated opening area s of the jet nozzle (2), so as to control an overlapping area between sector holes (9) of a rotor end (7) and a stator end (8), thereby opening the jet nozzle (2) for release.

Abstract: System and method for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer. For example, the system for controlling a bleeder current to increase a power factor of an LED lighting system without any TRIAC dimmer includes: a first current controller configured to receive a rectified voltage generated by a rectifier that directly receives an AC input voltage without through any TRIAC dimmer; and a second current controller configured to: control a light emitting diode current flowing through one or more light emitting diodes that receive the rectified voltage not clipped by any TRIAC dimmer; and generate a sensing voltage based at least in part upon the light emitting diode current, the sensing voltage representing the light emitting diode current in magnitude.

Abstract: A display screen assembly, an electronic device, and an image acquisition method are provided. The display screen assembly includes: a display screen including a first region and a second region; a coupling grating, used to couple and transmit an external light being incident toward the first region to the second region; and an electroluminescent device, used to allow the external light to be incident toward the first region or block the external light from being incident toward the first region.

Abstract: Embodiments of the present disclosure disclose a display apparatus, a manufacturing method for a display apparatus, and an electronic device. The display apparatus includes a first display region and a second display region which adjoin each other. A light transmittance of the second display region is smaller than a light transmittance of the first display region. The second display region includes a thin film transistor. A light shielding portion is disposed between the first display region and the second display region to shield the thin film transistor in the second display region from being irradiated by a light signal from the first display region.

Abstract: Provided are a display apparatus and an electronic device. A first display area of the display apparatus comprises: a pixel layer; an anode layer, which comprises multiple reflective anodes; multiple light-transmitting wires, wherein each light-transmitting wire is electrically connected to one or more reflective anodes, and the multiple light-transmitting wires are arranged at intervals; and multiple light-transmitting filling blocks, wherein each light-transmitting filling block is arranged between two light-transmitting wires that are spaced apart, and the difference between optical parameters of the light-transmitting filling blocks and the light-transmitting wires is less than a preset parameter threshold value.

Abstract: The disclosure provides a screen projection method, a screen projection apparatus and a storage medium. The method includes: determining, in response to a meeting screen projection request of a user, at least one candidate meeting reservation notification that meets a preset condition from current meeting reservation notifications of the user; obtaining and displaying meeting prompt information corresponding to each candidate meeting reservation notification; obtaining a first screen projection code corresponding to the meeting prompt information; and performing, in response to detecting a screen projection instruction of the user for a target meeting prompt information of the meeting prompt information, a screen projection connection with a screen projection device based on the first screen projection code and the target meeting prompt information.

Abstract: The present application provides a nut fastener, comprising a mounting nut and an adjustment bolt. The mounting nut comprises retaining arms and a nut receiving passage. The adjustment bolt is configured to be at least partially received in the nut receiving passage and comprises a bolt receiving passage. A bushing is arranged in the bolt receiving passage of the adjustment bolt and over molded onto a side wall of the bolt receiving passage by means of two-shot injection molding. The nut fastener in the present application is easy to mount and use.

Abstract: A nut fastener assembly includes a nut assembly and a fastening clip. Opposite sides of the bottom of the nut assembly are provided with a pair of protrusions. The fastening clip includes a pair of lugs arranged on opposite ends of the fastening clip and extending towards the nut assembly, and a pair of receiving channels configured to respectively penetrate the pair of lugs. At least one of the pair of lugs is an adjustable lug including a blocking part and an elastic part. The distal end of the elastic part is movable relative to the distal end of the blocking part. The corresponding protrusion in the pair of protrusions can enter the corresponding receiving channel through a space between the distal end of the blocking part and the distal end of the elastic part to be held in the receiving channel.

Abstract: The disclosure provides a screen projection method, a screen projection apparatus and a storage medium. The method includes: determining, in response to a meeting screen projection request of a user, at least one candidate meeting reservation notification that meets a preset condition from current meeting reservation notifications of the user; obtaining and displaying meeting prompt information corresponding to each candidate meeting reservation notification; obtaining a first screen projection code corresponding to the meeting prompt information; and performing, in response to detecting a screen projection instruction of the user for a target meeting prompt information of the meeting prompt information, a screen projection connection with a screen projection device based on the first screen projection code and the target meeting prompt information.

Abstract: A nut fastening clip comprises a substrate, and a sleeve. The substrate has an upper surface, a lower surface, a first lateral side, and a second lateral side. The substrate defines an upper opening. The first lateral side is opposite the second lateral side. The sleeve extends from the substrate. The sleeve defines a lower opening in communication with the upper opening. The sleeve has an outer face and a first anti-rotation plane disposed on the outer side face, adjacent to the first lateral side, and connected to the substrate.

Abstract: A tie down assembly includes a clasp, a ring that is rotatably coupled to the clasp, and a support coupler that is coupled to the ring. The support coupler frictionally controls rotation of the ring with respect to the clasp.

Abstract: A fastening nut and a fastening assembly that includes the fastening nut. The fastening nut includes a collar and a receiving column, the receiving column includes an engageable receiving portion and a deformable receiving portion. The deformable receiving portion includes an upper barrel and a lower barrel connected to each other. The upper barrel has a right cone shape, the lower barrel has an inverted cone shape, and an outwardly-protruding bent portion is formed at a joint between the upper barrel and the lower barrel. The deformable receiving portion includes at least two holes provided at intervals in a circumferential direction of the receiving column.

Abstract: A method to improve the production of acetyl-CoA-derived biochemicals by overexpression of an acetyl-coenzyme A synthetase or acetate-CoA ligase from naturally acetate-utilizing organisms with or without an added acetate transporter. The production of free fatty acid and its derivatives from renewable carbon source was used as a non-limiting example. Using this approach, the production of free fatty acids with yield close to the maximum theoretical yield at high titer can be achieved. As such, this invention will provide the necessary framework to produce many other products sharing or branching out from the fatty acid synthesis pathway economically. These products include hydrocarbons, fatty alcohols, hydroxy fatty acids, dicarboxylic acids, fatty acid esters, etc.

Abstract: This invention describes a method of using microbial to produce fats, such as fatty acids and their derivatives, or products derived from the fatty acid synthesis cycle, such as hydroxyfatty acids, methyl ketones, and the like.