Abstract: A shutter controller configured to control an operating rod of a shutter includes a controller housing, a clamping mechanism, and a driving mechanism. The controller housing includes a first housing and a second housing connected to each other, and the second housing is provided with a receiving cavity. The clamping mechanism is configured to clamp the operating rod and rotatably provided in the receiving cavity. The driving mechanism is provided in the first housing and is in transmission connection with the clamping mechanism, and the driving mechanism is configured to drive the clamping mechanism to rotate, thereby driving the operating rod to rotate.

Abstract: An optical assembly for demultiplexing wavelength channels includes a retro-reflecting Z-block of optically transmissive material having a port facing face and a back face. An optical port assembly including an array of channel ports and a common port is proximate to the port facing face. An array of optical filters is located along the port facing face in an optical alignment with respective optical ports. The filters are configured to selectively transmit light of corresponding wavelength channels. The back face of the retro-reflecting Z-block includes a main reflective surface between first and second angled reflective surfaces. The first and second angled reflective surfaces together form a retroreflector for light entering the retro-reflective Z-block via the common optical port.

Abstract: The present disclosure provides a core assembly, an electric toothbrush, a control method and a relevant device, and it relates to the field of health care technology. The core assembly includes: a motor including a hollow rotating shaft, a first end of the hollow rotating shaft being coupled to the toothbrush head; a peristaltic pump, a first end of the peristaltic pump being coupled to the toothpaste chamber, and a second end of the peristaltic pump being coupled to a second end of the hollow rotating shaft; and a control assembly electrically coupled to the peristaltic pump, and configured to control the peristaltic pump to transfer toothpaste in the toothpaste chamber through the hollow rotating shaft to the toothbrush head, the control assembly being further electrically coupled to the motor and configured to control the motor to operate so as to enable the toothbrush head to vibrate.

Abstract: An optical fiber array unit of an optical connector includes an opposing pair of grooved plates holding at least three rows of optical fibers between them, with at least some of the optical fibers in each of the at least three rows touching two optical fibers of an adjacent one of the at least three rows. Each grooved plate of the opposing pair has an array of parallel fiber-holding grooves. In some implementations, a groove pitch of the array may be such that the cores of the optical fibers are located at nodes of a square lattice.

Abstract: A vehicle control method includes obtaining road condition information ahead of a vehicle; controlling, in response to determining, based on the road condition information, that the vehicle has entered a double solid line road section, the vehicle to perform automated driving; and controlling, in response to determining, based on the road condition information, that the vehicle has exited the double solid line road section, the vehicle to exit automated driving.

Abstract: An optical connector includes a fiber positioning assembly and a frame having two walls for supporting the fiber positioning assembly in a controlled vertical alignment relative to the frame. The fiber positioning assembly includes an optical fiber array disposed at a top surface of a support block for positioning between the walls, and a cap covering top portions of the optical fibers projecting from the block. The cap has a flat alignment surface resting upon the fiber top portions and extending laterally beyond the support block such that when the block is disposed between the walls, free portions of the alignment surface rest upon the walls to control the vertical alignment of the array. A single rail affixed to a bottom shelf of the frame, and a correspondingly dimensioned rectangular notch at the bottom of the support block, control the horizontal alignment of the array.

Abstract: An optical connector includes a fiber positioning assembly and a frame having two walls for supporting the fiber positioning assembly in a controlled vertical alignment relative to the frame. The fiber positioning assembly includes an optical fiber array disposed at a top surface of a support block for positioning between the walls, and a cap covering top portions of the optical fibers projecting from the block. The cap has a flat alignment surface resting upon the fiber top portions and extending laterally beyond the support block such that when the block is disposed between the walls, free portions of the alignment surface rest upon the walls to control the vertical alignment of the array. A single rail affixed to a bottom shelf of the frame, and a correspondingly dimensioned rectangular notch at the bottom of the support block, control the horizontal alignment of the array.

Abstract: A water exchange base station including a main body, a sewage exchange port, a clear water exchange port, a first sewage connecting port, a first clear water connecting port arranged on the main body, and an inlet valve; when the clear water port of the intelligent cleaning machine is docked with the clear water exchange port and in the state of supplying clear water, the clear water exchange port supplies the clear water to the intelligent cleaning machine; when the sewage port of the intelligent cleaning machine is docked with the sewage exchange port and in the state of sewage discharging, the sewage inside the intelligent cleaning machine is drawn out from the sewage exchange port and discharged from the first sewage connecting port to the outside.

Abstract: A blockchain system, and related devices, systems, and methods are provided. A blockchain node device node device receives a first message from a gaming device in communication with the blockchain node device, the first message including a request for first play data corresponding to historical wagering activity by a player and wagering limit data associated with a limitation on wagering activity by the player. The blockchain node transmits a first blockchain block of a plurality of blockchain blocks of a blockchain data structure to the gaming device, wherein the first blockchain block includes the first play data. The blockchain node receives a second message from the gaming device, the second message including a second blockchain block including hash data associated with the first blockchain block and second play data corresponding to further wagering activity by the player. The blockchain node adds the second blockchain block to the blockchain data structure.

Abstract: An opening and closing device for curtains and a system based on the same, mounted on a curtain track, comprises a main engine and a roller mechanism, The main engine comprises a shell with a cavity, a driving wheel mounted in the cavity and partially exposed the shell, a motor arranged in the cavity and controlling the driving wheel to rotate, a controller lied in the cavity and controlling the motor to start and stop, and a signal transceiver module coupled electrically with the controller and receiving starting and stopping signals of the motor; the driving wheel is used for driving the curtains to move along the curtain track; a roller mechanism is mounted on the shell, an end, far away from the shell, of the roller mechanism is hung on the curtain track and presses the driving wheel closely on the curtain track.

Abstract: An opening and closing device for a curtain mounted on a guiding part, the guiding part is provided with the curtain; the opening and closing device is used for driving automatically the opening and closing of the curtain; the opening and closing device includes a mainframe and a connecting mechanism. The mainframe includes a shell, a driver, and a driving wheel; the driving wheel and the driver are mounted in the shell, the driver drives the driving wheel to rotate. The connecting mechanism includes a hanging piece and a bracket; a first end of the bracket is inserted into the shell, the hanging piece is movably connected with a second end of the bracket and hung on the guiding part; the hanging piece can be moved vertically relative to the bracket so that the driving wheel is attached closely to the outer wall of the guiding part.

Abstract: A shutter controller configured to control an operating rod of a shutter includes a controller housing, a clamping mechanism, and a driving mechanism. The controller housing includes a first housing and a second housing connected to each other, and the second housing is provided with a receiving cavity. The clamping mechanism is configured to clamp the operating rod and rotatably provided in the receiving cavity. The driving mechanism is provided in the first housing and is in transmission connection with the clamping mechanism, and the driving mechanism is configured to drive the clamping mechanism to rotate, thereby driving the operating rod to rotate.

Abstract: Provided are an SGLT-2 inhibitor-sarcosine cocrystal, a preparation method therefor and use thereof. Using sarcosine as a ligand, said cocrystal has higher safety and lower costs; a drug cocrystal has higher stability, and during the production process or storage process of a formulation composition, the crystal form is not easily changed; said cocrystal does not melt when heated, does not stick, aggregate or generate static electricity, and has better mixing uniformity. Said cocrystal has uniform distribution in a prepared pharmaceutical composition, causing that the pharmaceutical composition has better in-vivo release, absorption and efficacy, and has small difference between batches; and the pharmaceutical composition has high stability, and is more conducive to storage and transportation.

Abstract: The present invention relates to high-strength high-toughness low-temperature thick-plate structural steel and a heat treatment method thereof. The steel is composed of the following components by weight percentage: C: 0.03-0.08%, Cr: 0.8-1.9%, Mn: 0.01-1.0%, Ni: 3.5-7%, Mo: 0.2-0.5%, V: 0.15-0.2%, Nb: 0.01-0.05%, Cu: 1.2-3.8%, Al: 0-0.5%, P: <0.015%, S: <0.010%, and Fe and inevitable impurities as balance. Compared with the prior art, a steel plate prepared in the present invention can be used at low temperature of ?20 to ?120° C. and ?196° C., maintains relatively high strength and certain toughness, and mainly resolves a technical problem that existing high-strength high-toughness quenched and tempered steel cannot meet equipment requirements in polar resource and energy development; transportation, etc.

Abstract: An opening and closing device for curtains and a system based on the same, mounted on a curtain track, comprises a main engine and a roller mechanism, The main engine comprises a shell with a cavity, a driving wheel mounted in the cavity and partially exposed the shell, a motor arranged in the cavity and controlling the driving wheel to rotate, a controller lied in the cavity and controlling the motor to start and stop, and a signal transceiver module coupled electrically with the controller and receiving starting and stopping signals of the motor; the driving wheel is used for driving the curtains to move along the curtain track; a roller mechanism is mounted on the shell, an end, far away from the shell, of the roller mechanism is hung on the curtain track and presses the driving wheel closely on the curtain track.

Abstract: An opening and closing device for a curtain mounted on a guiding part, the guiding part is provided with the curtain; the opening and closing device is used for driving automatic opening and closing of the curtain; the opening and closing device includes a mainframe and a connecting mechanism. The mainframe includes a shell, a driver and a driving wheel; the driving wheel and the driver are mounted in the shell, the driver drive the driving wheel to rotate. The connecting mechanism includes a hanging piece and a bracket; a first end of the bracket is inserted into the shell, the hanging piece is movably connected with a second end of the bracket and hung on the guiding part; the hanging piece can be moved vertically relative to the bracket so that the driving wheel is attached closely to the outer wall of the guiding part.

Abstract: A blockchain system, and related devices, systems, and methods are provided. A blockchain node device node device receives a first message from a gaming device in communication with the blockchain node device, the first message including a request for first play data corresponding to historical wagering activity by a player and wagering limit data associated with a limitation on wagering activity by the player. The blockchain node transmits a first blockchain block of a plurality of blockchain blocks of a blockchain data structure to the gaming device, wherein the first blockchain block includes the first play data. The blockchain node receives a second message from the gaming device, the second message including a second blockchain block including hash data associated with the first blockchain block and second play data corresponding to further wagering activity by the player. The blockchain node adds the second blockchain block to the blockchain data structure.

Abstract: The present invention relates to high-strength high-toughness low-temperature thick-plate structural steel and a heat treatment method thereof. The steel is composed of the following components by weight percentage: C: 0.03-0.08%, Cr: 0.8-1.9%, Mn: 0.01-1.0%, Ni: 3.5-7%, Mo: 0.2-0.5%, V: 0.15-0.2%, Nb: 0.01-0.05%, Cu: 1.2-3.8%, Al: 0-0.5%, P: <0.015%, S: <0.010%, and Fe and inevitable impurities as balance. Compared with the prior art, a steel plate prepared in the present invention can be used at low temperature of ?20 to ?120° C. and ?196° C., maintains relatively high strength and certain toughness, and mainly resolves a technical problem that existing high-strength high-toughness quenched and tempered steel cannot meet equipment requirements in polar resource and energy development; transportation, etc.

Abstract: A method of performing a programming operation to a three dimensional (3D) NAND memory device is disclosed. The method makes residual electrons trapped in storage regions of middle dummy memory cells of the unselected string of the 3D NAND memory device to be removed during the pre-charging phase, so as to reduce program disturb to the selected string which neighbors the unselected string.