Abstract: A coal and coalbed methane mining system based on ground drilling includes: a drilling component, a coal mining drill bit and a ground facility group. The coal mining drill bit is set at a predetermined end of a directional borehole in a coal seam, connected to the drilling component through a connecting pipeline. The ground facility group is connected to the drilling component, to provide coal cutting slurry for the coal mining drill bit, receive reflux slurry carrying coal and coalbed methane, and precipitate and separate the reflux slurry carrying the coal and the coalbed methane. A coal and coalbed methane mining method based on ground drilling and related devices are also disclosed.

Abstract: Disclosed are an integrated mining method and an integrated mining system of coal breaking, coal extraction and water circulation in a U-well. The integrated mining system includes a first ground facility unit, a second ground facility unit, a jet unit and an extraction unit. The first ground facility unit is configured to transport jet fluid to the jet unit. The jet unit is configured to break a coal seam in a sub-segment to obtain broken cinders. The extraction unit is configured to extract a coal-water mixture. The second ground facility unit is configured to receive the coal-water mixture. In response to determining that an extraction of the sub-segment is complete, the jet unit and the extraction unit is configured to move to a next sub-segment using powers provided by the first ground facility unit and the second ground facility unit.

Abstract: A method for intelligent graphic association and an intelligent interactive display device are disclosed. The device includes a display screen and a control circuit, the display screen is configured to display content; the control circuit includes a processor and a memory, the memory is configured to store a program executable by the processor, and the processor is configured to read the program in the memory and perform following steps: obtaining first trajectory information of a hand-drawn graphic of a user; performing graphic recognition on the first trajectory information, and determining a standard graphic corresponding to the hand-drawn graphic according to a recognition result, where the standard graphic conforms to a predefined graphic specification; and displaying a control list of the standard graphic, where the control list includes at least one associative icon related to the standard graphic.

Abstract: A method for determining a reasonable sampling interval with three-dimensional (3D) laser scanning includes: collecting rock joints; acquiring point cloud data of the rock joints with 3D laser scanning; performing preprocessing on acquired point cloud data; conducting indoor mechanical tests to determine rock mechanics parameters; calculating, with preprocessed point cloud data of the rock joints, joint roughness coefficients (JRCs) under different intervals obtained from statistical roughness parameters; fitting different relational curves according to a scatter plot between the different intervals and the JRCs to obtain a fitting equation; reversely calculating a JRC of the rock joint sample with the rock mechanics parameters to obtain a reversely calculated JRC; and substituting, according to a relational equation between the different intervals and the JRCs, the reversely calculated JRC into the fitting equation to determine a reasonable sampling interval for roughness evaluation.

Abstract: A fiber-reinforced metal composite member and a manufacturing method thereof. The member includes a metallic matrix provided with a plurality of grooves thereon at a preset angle to a horizontal direction, and the grooves are filled with fiber-reinforced polymers therein.

Abstract: An anti-cracking suction device for Czochralski single crystal is provided, wherein the device includes an outer cylinder, an inner cylinder disposed in the outer cylinder, a suction tube, and a first gap. An upper portion of the suction tube extends into the inner cylinder from a bottom of the outer cylinder, a lower portion of the suction tube is disposed outside the outer cylinder. The first gap is disposed between a bottom of the inner cylinder and the outer cylinder, and is configured to cushion a thermal expansion of the bottom of the inner cylinder to reduce stress at where the suction tube is connected with the inner cylinder, in a case that silicon liquid is sucked into the inner cylinder by the suction tube and accumulated at the bottom of the inner cylinder.

Abstract: The present disclosure provides a method for automatically controlling material suction in a process of pulling-up of a monocrystal, including the steps of: obtaining a lifetime value and a resistivity of a pulled monocrystalline silicon rod; determining the lifetime value and a ratio of the lifetime value to the resistivity of the pulled monocrystalline silicon rod; if both the lifetime value and the ratio of the lifetime value to the resistivity are greater than set values, continuing to perform a re-feeding and pulling procedure; and if the lifetime value or/and the ratio of the lifetime value to the resistivity is less than or equal to the set values, performing a segment-taking and material suction procedure.

Abstract: Disclosed are 3D printing equipment, a system, and a method for food design and production. The 3D printing equipment has a bipolar microwave heating antenna for focusing heating on a material in an extrusion nozzle. The extrusion nozzle is between the anode antenna and the cathode antenna of the bipolar microwave heating antenna. The anode antenna and the cathode antenna limit a microwave electric field between them, thereby implementing focused heating on the material.

Abstract: The disclosure relates to a three-dimensional printer coupled with microwave and a printing method applied for food design. A microwave heating probe embedded in the inner wall of a barrel releases microwaves at the front end, and in combination with the setting of a vertical distance between the front end of the microwave heating probe and an extrusion nozzle, the effect of instant curing of an extruded material is realized. A cooling device is disposed so as to ensure that a material to be printed in the barrel is not cured by microwave heating before the material to be printed enters the extrusion nozzle.

Abstract: The disclosure discloses a three-dimensional printer coupled with microwave and printing method applied for food design, and belongs to the technical field of food.

Abstract: Disclosed are 3D printing equipment, a system, and a method for food design and production, belonging to the field of food technologies. A bipolar microwave heating antenna is disposed, to implement focused heating on a material in an extrusion nozzle. In addition, the bipolar microwave heating antenna breaks through a traditional multi-mode cavity heating method, thereby greatly reducing a volume of a heating cavity and facilitating integration with a desktop 3D printer. A microwave switch is controlled by using an extrusion instruction to achieve synchronization between extrusion and heating, and improve heating uniformity. Through joint operations of a 3D scanner, slicing software, and a 3D printer, processes of model making, slicing, and 3D printing are integrated.