Abstract: A bottom cylinder for a high-temperature and high-pressure environment simulator of a high-fidelity corer is provided. The bottom cylinder includes a cylinder barrel. The bottom of the cylinder barrel is provided with a cylinder base. The piston is provided inside the cylinder barrel and divides an inner cavity of the cylinder barrel into a rodless cavity and a rod cavity. The piston is provided with a piston rod. The outer wall of the cylinder barrel is provided with an oil inlet hole communicated with the rodless cavity, an oil outlet hole communicated with the rod cavity, and a reserved hole. The lower end surface of the piston is provided with a first buffer ring, and the upper surface of the cylinder base is provided with a second buffer ring mated with the first buffer ring. The bottom cylinder is applied to the simulator for oil and gas resource exploitation.

Abstract: A rotating extrusion rheometer includes a control monitoring mechanism, a melt extrusion mechanism, a rotating extrusion rheology machine head, a sensor, a drive chain wheel, a coupler and an electric motor. The control monitoring mechanism, the melt extrusion mechanism, the rotating extrusion rheology machine head are sequentially connected. The rotating extrusion rheology machine head is formed by a connecting pipe (1), a flow dividing support (3), a lower machine neck (12), a machine head piece (15), an opening mold (17), an opening-mold driving chain wheel (20), a core bar (21) and a core-bar driving mechanism. The rheology measurement method comprises the steps where some parameter values of the rheometer are collected first, and then the rheological behaviors of the polymer melt in the rotating extrusion process are obtained by performing calculation by means of using the derived formula.

Abstract: Disclosed is a system and a method for monitoring and adjusting a harmonic emission level of an industrial load. The method may include obtaining a grid load for a current time period, and determining, for each of at least one type of industrial load, a generalized probabilistic model for the industrial load by obtaining harmonic monitoring data of the industrial load at a preset frequency, determining a harmonic characteristic dataset for the industrial load, constructing an initial generalized probabilistic model for target harmonic data, and obtaining the generalized probabilistic model for the target harmonic data. The method may further include determining a harmonic impact factor of the industrial load, and in response to determining that the harmonic impact factor of the industrial load satisfies a first preset condition, generating and sending an adjustment instruction to a control device to adjust the at least one type of industrial load.

Abstract: The disclosure relates to the field of underground salt cavern energy storage, and discloses a coupling numerical simulation method for site selection of an underground salt cavern hydrogen storage, which specifically comprises the following. Geological data of an area where the salt cavern hydrogen storage is to be established is obtained. A three-dimensional model is established and grid meshing is performed. An initial coupling field is established and balanced based on the geological model, and then excavation simulation of the salt cavern hydrogen storage is performed. A geological model after excavation and related parameter values thereof are imported into TOUGH2MP software, a stress model in FLAC3D software is coupled with hydraulic and thermal models in the TOUGH2MP software to simulate a stress, hydraulic, and thermal coupling behavior process of rock layers around the salt cavern hydrogen storage in the area, and a coupled simulation result is obtained.

Abstract: A high-temperature and high-pressure simulator for a deep in-situ environment is provided. The simulator includes a high-fidelity sample chamber, where a lower end of the high-fidelity sample chamber is provided with a bottom cylinder. A lower end of the bottom cylinder is provided on a base. A piston rod of the bottom cylinder extends into the high-fidelity sample chamber, and an upper end of the piston rod is provided with a rock sample seat. An upper end of the high-fidelity sample chamber is provided with a rock sample cap. The top of the high-fidelity sample chamber is sealed by an end cap of the high-fidelity sample chamber. An upper end of the end cap of the high-fidelity sample chamber is provided with a multi-section coring drill chamber. The uppermost section of the coring drill chamber is connected to a lift cylinder.

Abstract: A pre-loadable dried biological heart valve and a preparation method thereof. The preparation method includes: Step A: soaking a fresh animal pericardium in an aqueous solution of soluble elastin or glycosaminoglycan, and then subjecting the pericardium to a first cross-linking reaction in a mixed solution of carbodiimide or N-hydroxysuccinimide to allow the soluble elastin or glycosaminoglycan to bind to the pericardium via a chemical bond; and Step B: subjecting the pericardium after the first cross-linking to a second cross-linking reaction in an aqueous glutaraldehyde solution, and then drying the pericardium after the second cross-linking, to obtain the pre-loadable dried biological heart valve. The dried biological heart valve obtained by the above preparation method has good toughness, and is rapidly flattened out in a simulated folding and pressing test.

Abstract: A silicone rubber composite heat dissipation pad and a preparation method thereof are provided. The method includes: dispersing hydroxyl-functionalized boron nitride nanosheet powder into deionized water, pouring it into a specialized container, pre-freezing it using liquid nitrogen, and then freeze-drying it to obtain a boron nitride nanosheet skeleton arranged in a horizontal direction; uniformly dispersing thermochromic nanoparticles in acetone to obtain a dispersion, mixing the dispersion with liquid silicone rubber and stirring until acetone is completely evaporated, then adding a curing agent to obtain a liquid silicone rubber pre-cure solution; pouring the liquid silicone rubber pre-cure solution into a container containing the boron nitride nanosheet skeleton, so that the liquid silicone rubber pre-cure solution is fully immersed in an interior of the boron nitride nanosheet skeleton; and then curing is carried out by elevating the temperature to obtain the heat dissipation pad.

Abstract: A chrome-free tanning process of an ecological leather is characterized by a TWS+sodium lignosulfonate+TWLZ ternary tanning process system. The sodium lignosulfonate added can not only have a fixation effect on a TWS tanning agent to make the TWS tanning not undergo detanning at a low pH, but also significantly improve the uniformity of distribution of a TWLZ tanning agent in a hide/skin and promote the formation of a stable cross-linked network structure by the TWLZ tanning agent in a collagen fiber, which effectively overcomes the defects of tanning performance of the existing tanning systems to obtain a leather with uniform and sufficient tanning, a high isoelectric point, a strong electropositivity, excellent absorption for post-tanning chemicals, and a prominent softness, and gives a leather a wide use range and a high quality.

Abstract: The present disclosure provides a method for improving a biological nitrogen removal effect of low-temperature sewage, and relates to the technical field of sewage treatment. In the present disclosure, the method is implemented by adding an exogenous signal molecule. The exogenous signal molecule can intervene in a quorum sensing (QS) phenomenon among microorganisms, and can also reduce mixed liquor suspended solids (MLSS), reduce an amount of remaining sludge, and reduce a cost of sludge treatment while effectively improving the low-temperature nitrogen removal effect.

Abstract: A fixing device for double-tube intubation includes a fitting component and a fixing frame arranged on the fitting component, where both ends of the fitting component are connected with a connecting portion, through which the fitting component is fixed to philtrum below nares. The fixing frame includes at least two pressing portions, one side of each of the pressing portions is connected mutually while the other side is mutually and detachably connected, and containing portions for placing the pipeline are arranged between the two pressing portions.

Abstract: The present invention belongs to the field of biomedicine, and particularly relates to a chimeric antigen receptor and use thereof. The present invention provides a novel chimeric antigen receptor, comprising an extracellular domain, a transmembrane domain and an intracellular domain, wherein the transmembrane domain and the intracellular domain of the chimeric antigen receptor form a costimulatory signaling domain, and the costimulatory signaling domain comprises a full length or a fragment of an amino acid sequence encoding a reverse dectin-1. Experiments prove that novel CAR-T cells provided by the present invention are effective against a variety of solid tumors and hematological malignancies.

Abstract: An assembly method for a deep in-situ high-fidelity coring calibration platform includes the following steps: S1: fixing a core bin assembly subsystem on a preset ground foundation and fixing a simulator of a core bin on a mounting base plate of the core bin assembly subsystem; S2: driving a cylinder and driving the mounting base plate to move to a preset position; S3: driving a servo motor and controlling two clips to move close to each other; S4: fixing a drill pipe bin assembly subsystem on the ground foundation; S5: assembling multiple sections of a drill pipe bin in turn; aligning and connecting a bottom of the drill pipe bin to the simulator, and aligning and communicating the top of the drill pipe bin with the lower part of an adaptive drill pipe guide structure; and S6: driving the adaptive drill pipe guide structure to perform accurate positioning.

Abstract: A real-time temperature-pressure detection and rapid processing system for a calibration platform, comprises an inner return pipe, and a water supply pipe is provided therein with an inner water supply pipe. An outer wall of the inner water supply pipe is connected with an inner wall of the water supply pipe through multiple springs. An outer wall of the inner return pipe is connected with an inner wall of a return pipe through multiple springs. The return pipe and the water supply pipe are made of a thermosetting polymer material. The multiple springs, the inner water supply pipe, and the inner return pipe are covered with a heat conducting material. The system further includes a temperature-pressure detection assembly. The assembly includes multiple infrared sensors arranged at two sides of the return pipe and the water supply pipe, a booster pump, a heater, and infrared sensors connected with a control unit.

Abstract: A high-temperature superconducting flux pump system comprises a flux pump body, a superconducting load, and a stator group. A double-pancake coil group comprises at least one double-pancake coil. The stator group comprises at least one stator. The flux pump body has an air gap for receiving the stator group. The superconducting load and the stator group are connected to form a closed circuit. The high-temperature superconducting flux pump system has a simpler structure, solves the problem of low charging rate of magnets, and greatly reduces the power cost without changing the magnet structure and winding cost.

Abstract: Disclosed is a preparation method of a plant biomass-based active tanning agent. Under a low-temperature reaction condition, cyanuric chloride and a plant biomass compound are used to synthesize an environment-friendly plant biomass-based active tanning agent through a nucleophilic substitution reaction. The active tanning agent obtained in the present disclosure appears as a white or light brown emulsion at room temperature, and has substantial active groups such as hydroxyl groups, carboxyl groups and ester groups introduced into its structure, thus endowing leathers with desirable hydrothermal stability and physical properties and having a desirable synergistic effect with metal tanning agents. Meanwhile, health and environment risks caused by hexavalent chromium and free formaldehyde in leathers are avoided.

Abstract: A vacuum interrupter. The vacuum interrupter comprising at least one anode side contact blade, at least one cathode side contact blade, at least one anode side conducting rod, at least one a cathode side conducting rod, a shielding case and an outer magnet, wherein the shielding case covers the at least one anode side contact blade, the c at least one anode side contact blade, the at least one anode side conducting rod and at least one cathode side conducting rod; and the outer magnet covers the shielding case. According to the vacuum interrupter, the outer magnet is arranged to generate a fixed first longitudinal magnetic field in the interelectrode area of the at least one anode side contact blade and the at least one cathode side contact blade, contraction of arcs during current breaking can be alleviated, the arcs are in a diffusion state, and ablation of the contact in the arcing process is reduced, and breaking capacity of a vacuum circuit breaker is guaranteed.

Abstract: The present invention belongs to the field of animal gas anesthesia, and provides a quantitative and precise gas anesthesia method and device for experimental animals. The quantitative and precise gas anesthesia device for experimental animals includes an anesthetic fluid tank, a drainage tube, catheters, closed animal anesthetic tanks, and a recycling container, where anesthetic fluid is put into the anesthetic fluid tank, the bottom of the anesthetic fluid tank is connected to an inlet of the drainage tube, a set of holes are evenly arranged in the drainage tube, each hole is connected to an inlet of each catheter, and outlets of the catheters extend into the closed animal anesthetic tanks.

Abstract: Disclosed is a rotational flow rotation deoiling method for oil-based mud rock debris.

Abstract: An oily sewage pretreatment method without air flotation, comprising the following steps: (a) sedimentation separation: performing sedimentation separation on oily sewage to implement preliminary separation of oil, sludge, and water; (b) boiling bed separation: performing boiling bed separation on the oily sewage obtained by the preliminary separation to further remove dispersed oil, sludge, and sand from the oily sewage; (c) shape coalescence separation: performing shape coalescence separation on the oily sewage obtained by the boiling bed separation in step (b) to implement demulsification, coalescence, and separation of emulsified oil; and (d) biochemical treatment: the effluent obtained in step (c) directly enters an AOH biochemical system, an air flotation unit is omitted. Also disclosed is an oily sewage pretreatment apparatus without air flotation.

Abstract: The present disclosure provides a method for calibrating a rotation center based on a blade local leading-edge curve feature. The method acquires a blade local leading-edge curve feature before and after rotation, solves centroid coordinates according to maximum values in the blade local leading-edge curve features in the two times, and then solves a rotation center according to the centroid coordinates, thereby calibrating a coordinate of the rotation center. Compared with a point calibration method in the prior art, the present disclosure has a more accurate result by curve calibration and is more suitable for a real rotation center; and the method also has a more accurate blade measurement result when applied to measuring a blade cross-section curve feature.