Abstract: A quick-assembly structure includes an inserting portion and an inserting port allowing the inserting portion to be inserted, where one of the inserting portion and the inserting port is provided on the chassis, and the other one is provided on the back frame. A locking block of the inserting portion is movably arranged relative to the inserting port; and in an assembled state, a bump of the inserting portion is inserted into the inserting port along with the inserting portion, the locking block is pushed by an elastic force of an elastic member of the inserting port to enter a locking position, and at the locking position, a locking end of the locking block enters the inserting port and abuts against an abutting surface of the bump so as to restrict the inserting portion from being pulled out in a direction opposite to an inserting direction thereof.

Abstract: A quick-assembly structure includes first inserting connection structures, where each of the first inserting connection structures includes an inserting and clamping member and a groove body; each of the groove bodies includes an inserting groove and a clamping groove which are in communication with each other, the corresponding inserting and clamping member is inserted into the inserting groove in a vertical direction and then horizontally slides into the clamping groove in a first direction; and the seat cushion is further provided with elastic buckles, the chassis includes a clamping connection surface, and when the inserting and clamping members slide to predetermined positions in the clamping grooves, the elastic buckles are clamped with the clamping connection surface of the chassis in an abutting manner so as to restrict the chassis from sliding relative to the seat cushion in a direction opposite to the first direction.

Abstract: Redox gating, intrinsically apart from conventional electrolyte gating, combines reversible redox functionalities with common ionic electrolyte moieties to engineer charge transport for power efficient phase control. A colossal sheet carrier density modulation beyond 1016/cm2 as well as up to thousand durable cycling can be reached at the subvolt regime in archetypical functional oxide thin films without unbridled perturbations from ionic defects, which include either cation/anion vacancy or ionic intercalated species like proton. Besides, the redox gating represents a simply and practical way to decouple the electrical and structural phase transitions, improving the device longevity and operation response time. The redox gating works for a wide variety of materials regardless of its crystallinity or crystallographic orientation, including all other functional heterostructures and low-dimensional quantum materials composed of sustainable elements.

Abstract: A simulation test system for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas.

Abstract: A simulation test method for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas.

Abstract: A system for extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well is constructed by a horizontal well drilling and reaming subsystem and adjoins a vertical well to form a U-shaped well, and a horizontal section of the horizontal well is reamed to enlarge hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem further pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas.

Abstract: A method of extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well drilling and reaming subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section of the horizontal well to enlarge a hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas.

Abstract: A system for extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well is constructed by a horizontal well drilling and reaming subsystem and adjoins a vertical well to form a U-shaped well, and a horizontal section of the horizontal well is reamed to enlarge hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem further pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas.

Abstract: A method of extracting gas from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity is provided. A horizontal well drilling and reaming subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section of the horizontal well to enlarge a hole diameter. A horizontal well hole-collapse cavity-construction depressurization excitation subsystem performs pressure-pulse excitation and stress release on the horizontal well of tectonically-deformed coal bed methane, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section along a depressurizing space. A product lifting subsystem pulverizes the coal and lifts the mixture towards a wellhead of a vertical well. A gas-liquid-solid separation subsystem separates the coal, liquid and gas.

Abstract: A simulation test system for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas.

Abstract: A simulation test method for gas extraction from a tectonically-deformed coal seam in-situ by depressurizing a horizontal well cavity. A coal series stratum structure reconstruction and similar material simulation subsystem simulates a tectonically-deformed coal reservoir. A horizontal well drilling and reaming simulation subsystem constructs a U-shaped well in which a horizontal well adjoins a vertical well, and performs a reaming process on a horizontal section thereof. A horizontal well hole-collapse cavity-construction depressurization excitation simulation subsystem performs pressure-pulse excitation and stress release on the horizontal well, and hydraulically displaces a coal-liquid-gas mixture such that the mixture is conveyed towards a vertical well section. A product lifting simulation subsystem further pulverizes the coal and lifts the mixture. A gas-liquid-solid separation simulation subsystem separates the coal, liquid and gas.

Abstract: The present disclosure relates to a control device and a control system for a converter. The control device according to the present disclosure includes: a touchscreen adapted to provide a human-machine interface; a communication adapter plate connected to the touchscreen, the touchscreen communicating with the communication adapter plate using a first communication protocol; and a PLC control device adapted to control the converter, the PLC being connected to the communication adapter plate and communicating with the communication adapter plate using a second communication protocol that is different from the first communication protocol. The control device and the control system for a converter according to the present disclosure may incorporate both the touchscreen and PLC, achieve an excellent closed-loop control capability, and thus meet user requirements.