Abstract: Provided is a display module. The display module includes: a backplane, a middle frame, a backlight module, and a display panel; wherein the backlight module and the display panel are sequentially laminated on the backplane; the middle frame includes a first frame body and a bearing structure, wherein the first frame body surrounds the backlight module, the bearing structure is disposed on the first frame body and extends in a direction towards a center of the backlight module, and the backlight module and the display panel are respectively disposed on two faces of the bearing structure; and the backlight module includes a light guide plate, and the display module has a view angle greater than or equal to 45° on at least one side of the display module.

Abstract: An optical module includes a base, a first cover, a circuit board, a light emitting assembly and a light receiving assembly. Part of the circuit board is arranged on a surface of the base, and part thereof arranged outside the base. The light emitting assembly includes a plurality of light-emitting chips disposed on the base and an optical multiplexer disposed on the first cover and located in a laser exit direction of the plurality of light-emitting chips. The light receiving assembly includes an optical demultiplexer disposed on the first cover, a plurality of light-receiving chips disposed on the circuit board and are located in a laser exit direction of the optical demultiplexer, a reflection prism disposed at a side of the plurality of light-receiving chips away from the circuit board, and an optical receiving case covering the plurality of light-receiving chips and the reflection prism.

Abstract: Anti-rotation bearing assemblies for electric submersible pumps are provided. An electric submersible pump includes a plurality of centrifugal pump stages, each stage including a rotating impeller and a stationary diffuser mounted on a shaft coupled to a motor. In use, the motor rotates the shaft, which rotates the impeller within the stationary diffuser. A bearing assembly can include a bearing sleeve disposed about the shaft and a bushing disposed radially between the bearing sleeve and the diffuser. The bearing sleeve rotates with the shaft in operation, and the bushing remains stationary with the diffuser. The bushing can have an external key that is received in a keyway or groove in the diffuser to act as an anti-rotation feature. In other variations, the bushing can have an eccentric or oblique profile, which can act as an anti-rotation feature.

Abstract: An on-board charger, a DCDC converter and a control method are provided. The on-board charger includes a power factor corrector, a high-voltage direct-current converter, a low-voltage direct-current converter, and a controller. An input terminal of the high-voltage direct-current converter is connected to an output terminal of the power factor corrector. An input terminal of the low-voltage direct-current converter is connected to an output terminal of the high-voltage direct-current converter or the output terminal of the power factor corrector. An output terminal of the low-voltage direct-current converter is connected to a low-voltage battery and a low-voltage load. The low-voltage direct-current converter includes a main power transistor and a controllable switching transistor.

Abstract: An optical module includes a base, a first cover, a circuit board, a light emitting assembly and a light receiving assembly. The light emitting assembly includes a plurality of light-emitting chips and an optical multiplexer. The plurality of light-emitting chips are disposed on the first bottom plate. The optical multiplexer is disposed on the first cover and is located in a laser exit direction of the plurality of light-emitting chips. The light receiving assembly includes an optical demultiplexer and a plurality of light-receiving chips. The optical demultiplexer is disposed on the first cover. The plurality of light-receiving chips are disposed on the circuit board and are located in a laser exit direction of the optical demultiplexer.

Abstract: Anti-rotation bearing assemblies for electric submersible pumps are provided. An electric submersible pump includes a plurality of centrifugal pump stages, each stage including a rotating impeller and a stationary diffuser mounted on a shaft coupled to a motor. In use, the motor rotates the shaft, which rotates the impeller within the stationary diffuser. A bearing assembly can include a bearing sleeve disposed about the shaft and a bushing disposed radially between the bearing sleeve and the diffuser. The bearing sleeve rotates with the shaft in operation, and the bushing remains stationary with the diffuser. The bushing can have an external key that is received in a key way or groove in the diffuser to act as an anti-rotation feature. In other variations, the bushing can have an eccentric or oblique profile, which can act as an anti-rotation feature.

Abstract: An optical module includes a circuit board and an optical transmitter device. The optical transmitter device includes a substrate, a spacer disposed on and electrically connected to the circuit board, a laser chip disposed on and electrically connected to the spacer, an optical fiber adapter disposed on the substrate in a light exit direction of the laser chip, a focusing lens disposed between the laser chip and the optical fiber adapter, light incident surface of the optical fiber adapter has a first inclination angle with respect to an axis of the optical fiber adapter, the axis of the optical fiber adapter being located in a plane parallel to the substrate, the optical fiber adapter is obliquely disposed on the substrate such that an axis of the internal optical fiber has a second inclination angle with respect to optical axis of the focusing lens.

Abstract: The present disclosure relates to a method for constructing a trehalose polyenzyme complex in vitro by mediation of an artificial scaffold protein, which mainly comprises the following steps: constructing a recombinant bacterium WB800n-ScafCCR for self-assembled scaffold protein module; constructing a recombinant bacterium WB800n-P43-phoD -treY-Ccdoc for self-assembled catalytic module; constructing a recombinant bacterium WB800n-P43-phoD-treZ-Ctdoc for self-assembled catalytic module; constructing a recombinant bacterium WB800n-P43-phoD-cgt-Rfdoc for self-assembled catalytic module; secretorily expressing the recombinant bacteria and self-assembling in vitro to obtain a recombinant trehalose multi-enzyme complex. The trehalose multi-enzyme complex constructed by the method of the present disclosure has a higher catalytic efficiency in preparing trehalose than that of mixed free enzymes, and the method can be used for production of high quality trehalose after immobilization with cellulose microspheres.

Abstract: The present disclosure discloses an optical module including a circuit board; a housing assembly including a light-receiving portion and a light-emitting cavity separated via a separation board and stacked one above the other, one side of the housing assembly adjacent to the circuit board being provided with a first notch through which one end of the circuit board is inserted into the housing assembly; a light-receiving assembly disposed in the light-receiving portion and electrically connected to an upper surface of the circuit board; and a light-emitting assembly disposed in the light-emitting cavity and electrically connected to a lower surface of the circuit board; a concave region is formed in the light-emitting cavity, and a laser assembly of the light-emitting assembly is arranged therein to lift the laser assembly to reduce height difference between wire bonding surface of the laser assembly and lower surface of the circuit board.

Abstract: The present disclosure discloses an optical module including: a circuit board; a housing assembly divided by a separation board into a first portion and a second portion that are stacked one above the other, wherein a light-emitting cavity is formed in the second portion, and a partition wall is provided in the first portion to separate the first portion into a light-receiving cavity and a slot, and is provided with a plurality of light-passing holes via which the light-receiving cavity is in communication with the slot; an optical fiber adapter disposed in the housing assembly and in communication with the light-receiving cavity; a light-emitting assembly arranged in the light emitting cavity and electrically connected to the circuit board, wherein heat generated by the light-emitting assembly is conducted to a surface of the housing assembly via the partition wall; and a light-receiving assembly.

Abstract: An optical module includes a shell, a circuit board and an optical transmitter device. The circuit board is disposed in the shell. The optical transmitter device is disposed in the shell, and includes a plate-shaped substrate and a laser assembly. The laser assembly is disposed on a surface of the substrate, is electrically connected to the circuit board, and is configured to emit an optical signal. The substrate is fixedly connected to an end of the circuit board.

Abstract: Provided are a set and a display apparatus. The set includes a display module, a bezel, a back housing and a system board. The bezel is sleeved over a periphery of the display module. The back housing includes a first shell on a side opposite to a back plate of the display module, and a second shell adjacent to an inner peripheral surface of the bezel. One end of the second shell is connected to an edge of the first shell, and the other end of the second shell is provided with a support portion for supporting an edge of the display module so that a reserved space for accommodating the system board is formed between the display module and the first shell, and the second shell is fixedly connected to the bezel to implement configuration and assembly of the system board, thereby improving the user experience.

Abstract: A backlight source includes light bars, adapter plate(s) and connection structures. Each light bar includes light-emitting group(s) and external connection unit(s). Each external connection unit is electrically connected to at least one light-emitting group and included at least one first electrode pair. Each adapter plate includes adapter circuits, each adapter circuit includes adapter units, each adapter unit includes at least one second electrode pair. Ends of each connection structure are electrically connected to one external connection unit and one adapter unit. All second electrode pairs of adapter units of a same adapter circuit are classified into at least one group, each group includes second electrode pairs electrically connected in series. In light-emitting groups electrically connected to adapter units of the same adapter circuit, light-emitting groups electrically connected second electrode pairs in a same group are connected in series to form a dimming region.

Abstract: A semiconductor structure including: a substrate including a plurality of conductive layers and a plurality of insulating layers stacked alternately with each other along a vertical direction of the substrate; a first conductive via structure extending from a top conductive layer of the conductive layers to a bottom conductive layer of the conductive layers and including a first capacitive structure, the first capacitive structure extending in a first conductive layer of the conductive layers; a second conductive via structure extending from the top conductive layer to the bottom conductive layer and including a second capacitive structure extending in the first conductive layer; and a third capacitive structure extending in the first conductive layer or a second conductive layer of the conductive layers, wherein the third capacitive structure forms a first mutual capacitance with the first capacitive structure and a second mutual capacitance with the second capacitive structure.

Abstract: Provided is a display panel, including an array substrate, a color filter substrate, and a back light module. The back light module includes a light source, and the light emission spectrum of the light source has a first blue peak and a second blue peak. The color filter substrate is provided with multiple pixel units which are periodically and repeatedly disposed, and at least one pixel unit includes a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel. The first blue sub-pixel and the second blue sub-pixel have different transmittance spectrums; a peak wavelength of a transmittance spectrum of the first blue sub-pixel matches a peak wavelength of the first blue peak of the light source, and a peak wavelength of a transmittance spectrum of the second blue sub-pixel matches a peak wavelength of the second blue peak of the light source.

Abstract: An ultra-high phosphorus molten iron low-cost smelting method for polar steel includes successively deoxidizing and tapping alloying raw materials including molten iron; performing slag adjusting and refining on the molten steel obtained in the converter smelting step to obtain a refined molten steel; vacuum degassing the refined molten steel; and performing continuous casting on the molten steel obtained after the RH degassing step to obtain a cast billet.

Abstract: A three-level Boost circuit is provided. The three-level Boost circuit includes: an input capacitor, an inductor, a first switch, a second switch, a first freewheeling diode, a second freewheeling diode, a flying capacitor, a balance capacitor, a charging diode, a clamp diode, a discharging diode and an output series capacitor bank. The output series capacitor bank includes multiple output capacitors connected in series, and has a first node and a second node; a potential of the first node is higher than a potential of a cathode of the charging diode, and a potential difference between a cathode of the second freewheeling diode and the second node does not exceed a withstand voltage of the second freewheeling diode.

Abstract: An optical module includes a base, a first cover, a circuit board, a light emitting assembly and a light receiving assembly. The light emitting assembly includes a plurality of light-emitting chips and an optical multiplexer. The plurality of light-emitting chips are disposed on the first bottom plate. The optical multiplexer is disposed on the first cover and is located in a laser exit direction of the plurality of light-emitting chips. The light receiving assembly includes an optical demultiplexer and a plurality of light-receiving chips. The optical demultiplexer is disposed on the first cover. The plurality of light-receiving chips are disposed on the circuit board and are located in a laser exit direction of the optical demultiplexer.

Abstract: A steel board for polar marine engineering and a preparation method therefor. According to weight percentage, the components of the steel board are: C: 0.06-0.09%, Si: 0.20-0.35%, Mn: 1.48-1.63%, Nb: 0.020%-0.035%, Ti: 0.010%-0.020%, V: 0.020%-0.035%, Ni: 0.08%-0.17%, Als: 0.015%-0.040%, P: ?0.013% and S: ?0.005%. The preparation method for the steel board comprises: pre-refining, refining and casting to obtain a cast billet, and the slowly cooling down same. The slowly cooled billet is heated and then rolled out to obtain the steel board; and the steel board is cooled down and ready. The steel has an excellent comprehensive performance in terms of having high strength and low temperature resistance, being easy to weld and corrosion proof, and the steel has good low-temperature aging impact toughness.

Abstract: An isolated power converter and a hydrogen production system are provided. An electrical connection structure in the isolated power converter includes N secondary winding output bus bars, N rectifier circuit input bus bars, and a positive-negative bus bar, where N is greater than or equal to 1. A secondary winding may include M tapping points, and the secondary winding output bus bar and the rectifier circuit input bus bar that correspond to the secondary winding each include M copper bars that are insulated and stacked. The M tapping points of the secondary winding overlap the M copper bars of the secondary winding output bus bar at input ends of the M copper bars, respectively. The positive-negative bus bar includes two copper bars that are insulated and stacked.