Abstract: An intelligent question answering method includes: determining, based on received question information, a target object and a target attribute corresponding to the question information; obtaining an answer knowledge path and an external knowledge path of the target object other than the answer knowledge path from a pre-established knowledge graph based on the target object and the target attribute, the answer knowledge path including target context information for describing the target attribute, and the external knowledge path including external context information for describing another attribute; inputting the answer knowledge path and the external knowledge path into a trained neural network model to obtain a reply text, a training corpus of the neural network model during training including at least comment information of the target object; and outputting the reply text.

Abstract: The present invention discloses a preparation method and recycling method for degradable and recyclable paper plastics with water resistance and high-strength. By coating cyclic carbonate and amine compounds on paper, these compounds penetrate the paper's fiber structure, followed by curing treatment, resulting in a recyclable, degradable, and reprocessed paper plastic material with water resistance and high-strength. This method involves coating only cyclic carbonate and amines onto the paper, which, after heating, yields the paper plastic. The invention offers versatility, enhancing various paper types with improved mechanical properties, temperature resistance, water resistance, and solvent resistance while maintaining degradation capability. The paper plastic exhibits excellent self-healing, plasticity, degradation, and reprocessing properties. The process method is straightforward and user-friendly, making it suitable for industrial-scale production.

Abstract: Disclosed is a method for preparing a heterogeneous metal composite structure for medical implantation, including the steps of: step 1, preparing titanium alloy powder into a porous skeleton according to different printing strategies; step 2, filling magnesium after being melted into pores of the porous skeleton; and step 3, cooling a titanium-magnesium interpenetrating phase composite structure prepared in step 2 to room temperature, and covering a surface of the titanium-magnesium interpenetrating phase composite structure with a hydroxyapatite coating. In the present disclosure, a porous lattice dot-array structure of titanium alloy is used as a skeleton, and the skeleton pore is filled by pressureless infiltration of magnesium or hot isostatic pressure.

Abstract: The present disclosure provides a phase shifter, an antenna and an electronic device, and belongs to the field of communication technology. The phase shifter includes a plurality of phase shifting units, a first power division network and a second power division network; each phase shifting unit includes a first transmission structure and a second transmission structure; the first power division network includes a first feeding port and a plurality of second feeding ports; the second power division network includes a third feeding port and a plurality of fourth feeding ports; and the first transmission structure of the phase shifting unit is electrically connected to one second feeding port; the second transmission structure of the phase shifting unit is electrically connected to one fourth feeding port.

Abstract: Disclosed is a method for preparing a heterogeneous metal composite structure for medical implantation, including the steps of: step 1, preparing titanium alloy powder into a porous skeleton according to different printing strategies; step 2, filling magnesium after being melted into pores of the porous skeleton; and step 3, cooling a titanium-magnesium interpenetrating phase composite structure prepared in step 2 to room temperature, and covering a surface of the titanium-magnesium interpenetrating phase composite structure with a hydroxyapatite coating. In the present disclosure, a porous lattice dot-array structure of titanium alloy is used as a skeleton, and the skeleton pore is filled by pressureless infiltration of magnesium or hot isostatic pressure.

Abstract: Exosomes that express peptides in CD9 proteins, and smart exosomes that co-express two peptides incorporated into CD9 proteins to home delivery of the exosomes to a desired target and evade phagocytosis by macrophages, are described.

Abstract: A device and a method for evaluating damage of high-temperature and high-humidity gas to a surrounding rock porous structure are provided. The device includes a rock sample clamper, a temperature control device, a pressurizing device, a gas mixing injection device, a CT scanning device and a low-temperature nitrogen adsorption device. By simulating the gas rock reaction under the conditions of in-situ temp., pressure and gas, using CT scanning device to visually monitor and analyze the reaction condition of gas and tunnel surrounding rock and the change condition of porous structure, and using low-temperature nitrogen adsorption test to obtain porous structure parameters change condition before and after reaction of gas and tunnel surrounding rock, and the damage evaluation index of the porous structure is established.

Abstract: A device and a method for evaluating damage of high-temperature and high-humidity gas to a surrounding rock porous structure are provided. The device includes a rock sample clamper, a temperature control device, a pressurizing device, a gas mixing injection device, a CT scanning device and a low-temperature nitrogen adsorption device. By simulating the gas rock reaction under the conditions of in-situ temp., pressure and gas, using CT scanning device to visually monitor and analyze the reaction condition of gas and tunnel surrounding rock and the change condition of porous structure, and using low-temperature nitrogen adsorption test to obtain porous structure parameters change condition before and after reaction of gas and tunnel surrounding rock, and the damage evaluation index of the porous structure is established.

Abstract: A microfluidic device for extracting DNA is provided. The microfluidic device includes a feeder layer, a buffer layer and a pneumatic layer which are sealed and stacked in sequence. An electromagnetic plate is arranged between the buffer layer and the pneumatic layer. The feeder layer is provided with multiple main channels and three blister openings. A syringe pump is connected to an inlet of each main channel. The buffer layer is provided with segmented buffer channels, each segmented buffer channel is provided with multiple subchannels, and each segmented buffer channel corresponds to one pop-type blister. The buffer channel is communicated with a main channel. The pop-type blister is communicated with an inlet of the segmented buffer channel. The pop-type blister is arranged at the top of the feeder layer and is communicated with the inlet of the segmented buffer channel through the blister opening.

Abstract: An automatic fraction collector, methods of using the same, and systems including the same are described. The automatic fraction collector includes a sensor assembly able to detect liquid drops passing therethrough with light, where the sensor assembly is in the fluid flow path between a column and the point of collection of the liquid drops.

Abstract: Exosomes that express peptides in CD9 proteins, and smart exosomes that co-express two peptides incorporated into CD9 proteins to home delivery of the exosomes to a desired target and evade phagocytosis by macrophages, are described. Provided are exosomes useful for delivering drugs to desired targets. The exosomes comprise drugs, such as chemotherapeutic drugs, encapsulated in their core. The targets include pancreatic cancer cells.

Abstract: The present invention discloses a preparation method and recycling method for degradable and recyclable paper plastics with water resistance and high-strength. By coating cyclic carbonate and amine compounds on paper, these compounds penetrate the paper's fiber structure, followed by curing treatment, resulting in a recyclable, degradable, and reprocessed paper plastic material with water resistance and high-strength. This method involves coating only cyclic carbonate and amines onto the paper, which, after heating, yields the paper plastic. The invention offers versatility, enhancing various paper types with improved mechanical properties, temperature resistance, water resistance, and solvent resistance while maintaining degradation capability. The paper plastic exhibits excellent self-healing, plasticity, degradation, and reprocessing properties. The process method is straightforward and user-friendly, making it suitable for industrial-scale production.

Abstract: Disclosed is a flow control system for digital and mechanical redundant pressure compensation. On the basis of an original pressure compensation valve, two-position three-way electromagnetic valves are added to control the opening and closing of pressure compensation valves. Furthermore, pressure sensors and a controller are added, so that the system has a digital pressure compensation function. When the pressure sensor breaks down, the flow control system is switched to a mechanical compensation mode to achieve mechanical pressure compensation, the problem that system flow cannot be controlled when the sensor breaks down is solved, and the purpose of redundancy control is achieved. Moreover, the pressure compensation valve in the loop where the highest load is located can be controlled to be completely opened through the two-position three-way electromagnetic valve to reduce pressure loss of the valve port, and the pressure is not affected by load fluctuation.

Abstract: An antenna includes a first substrate and a second substrate oppositely arranged; the first substrate includes: a first dielectric substrate having a first surface and a second surface oppositely arranged; a reference electrode layer on the first surface; at least one first radiation part on the second surface and having an orthographic projection on the first dielectric substrate at least partially overlapping that of the reference electrode layer; and at least one feeding structure on the second surface, electrically connected to the first radiation part, and having an orthographic projection on the first dielectric substrate at least partially overlapping that of the reference electrode layer; the second substrate includes: a second dielectric substrate opposite to the second surface; and at least one second radiation part on the second dielectric substrate, and each having an orthographic projection on the first surface within that of one first radiation part.

Abstract: A transparent antenna and a communication system are provided and belong to the field of communication technology. The transparent antenna includes: a dielectric layer including opposite first and second surfaces in a thickness direction thereof; a first conductive layer on the first surface of the dielectric layer and including at least one first feed line and at least one second feed line; and a second conductive layer on the second surface of the dielectric layer and including at least one first opening; an outline of an orthographic projection of each first opening on the dielectric layer intersects with an orthographic projection of each of corresponding first and second feed lines on the dielectric layer, which extends into the orthographic projection of the first opening on the dielectric layer, and the at least one first feed line and the at least one second feed line have different feeding directions.

Abstract: A shoe-pad, shoe and hallux orthotic device, the shoe-pad is configured for correcting and preventing deformity of a hallux, the shoe-pad includes a shoe-pad body, a first orthotic portion, and a second orthotic portion; the first orthotic portion and the second orthotic portion are protruded from a surface of the shoe-pad body and spaced from each other, and the first orthotic portion and the second orthotic portion are staggered from each other in a front-back direction. The first orthotic portion and the second orthotic portion are spaced from each other on the shoe-pad body, and the first orthotic portion and the second orthotic portion are staggered from each other in a front-back direction, the structure is simple, the production and using are convenient, the hallux valgus can be corrected and prevented without a surgery, and the suffering and financial burden of the patients are reduced.

Abstract: An acetabular reconstruction prosthesis with a piling-cup system is provided, which includes an iliac posterior pile screw, an iliac anterior pile screw, a pubic pile screw, an ischial pile screw, abutments, a 3D (three-dimensional) printed porous titanium mesh cup, locking screws, nuts, and tail cap screws. Four pile screws are the iliac posterior pile screw facing posterior of the ilium, the iliac anterior pile screw facing iliac tubercle, the ischial pile screw running along ischium ramus, and the pubic pile screw running along pubic ramus. A stable prothesis support system is formed in the acetabular reconstruction prosthesis with a piling-cup system, which conforms to the biomechanical characteristics of physiological pelvis, reduces the risk of prosthesis loosening and dislocation, and improves long-term stability of the prosthesis through biological fixation.

Abstract: An antenna is provided. The antenna includes a ground plate; a dielectric layer on the ground plate; and a radiating patch and a microstrip feed line on a side of the dielectric layer away from the ground plate. The radiating patch has a parallelogram shape having a first side connected to the microstrip feed line, a second side opposite to the first side, a third side connecting the first side and the second side, and a fourth side converting the first side and the second side, the third side being opposite to the fourth side. The antenna further includes a gain enhancement structure on at least one of the second side, the third side, or the fourth side.