Abstract: An integrated gas diffusion layer for a fuel cell, and a preparation method and use thereof are provided. In the integrated gas diffusion layer, a flow field plate and a gas diffusion layer are integrated into an integral structure, including processing a surface of the gas diffusion layer by etching or pressing to form a flow field structure with a flow channel and a rib, so that the surface of the gas diffusion layer also has the function of a flow field, thereby forming the integrated gas diffusion layer. By adopting the technical solution of the present application, the structure having the flow channel with high porosity and the microchannel rib is engraved on the surface of the existing gas diffusion layer by methods such as lase engraving, machining, mechanical pressing and the like, to realize integration of the flow field plate and the gas diffusion layer.

Abstract: The present invention relates to the technical field of lithium-ion batteries, and particularly provides a positive electrode sheet and a preparation method therefor, and a lithium-ion battery comprising the positive electrode sheet. The positive electrode sheet comprises a positive electrode active material layer, and the positive electrode active material layer comprises a positive electrode material, a negative thermal expansion material, a conductive agent, and a binder, wherein the characteristic value J of the positive electrode sheet satisfies: 0.001?J?0.005. wherein J=R(F)/?, R(F) represents the peak intensity ratio between the main peak (F) of the negative thermal expansion material and the (003) characteristic peak of the positive electrode material in the XRD pattern of the positive electrode sheet, and p represents the surface density of the positive electrode sheet, with a unit of mg/cm2.

Abstract: The disclosure provides a use of C3aR in preparing drugs for preventing or treating polycystic kidney disease, belonging to the technical field of medicines. The disclosure discovers that C3aR inhibitor can down-regulate or reduce the C3aR level by inhibiting proliferation of cyst epithelial cells, blocking chemotaxis of C3a-C3aR on macrophages, inhibiting the interaction between C3a and C3aR, and expressing the p-ERK, p-P65 proteins, and then prevent cyst growth, improve the inflammatory state, thus treating polycystic kidney disease. The C3aR inhibitor can be used for the development of novel lead compounds for preventing or treating autosomal dominant polycystic kidney disease, and also can be used for preparing drugs for preventing or treating polycystic kidney disease.

Abstract: A counterweight of washing machine, a washing machine and a counterweighting method for the washing machine relates to the technical field of washing machines. The counterweight of washing machine includes at least one counterweight cavity and at least one pressured water structure; a water entering port for connecting a water entering pipeline and a water draining port for connecting a water draining pipeline are formed on a wall of each of the at least one counterweight cavity; the at least one water pressurizing structure is disposed in each of the at least one counterweight cavity, and is configured to enable water entering each of the at least one counterweight cavity to be in an air-free sealed cavity. The counterweight of washing machine is mainly configured to reduce vibration and nose of the washing machine in work, and reduce the production and transportation cost of the washing machine.

Abstract: The present application provides a method and system for calibration of structural parameters and construction of an affine coordinate system of a vision measurement system. The method comprises the following steps: S1, for the same image, performing bundle adjustment on front points and corresponding image points to acquire rear intersection point coordinates; S2, acquiring world coordinate of a front principal point corresponding to an intersection point; S3, performing the steps S1 and S2 cyclically by utilizing a plurality of different calibrated images to acquire a plurality of pairs of intersection point coordinates and world coordinates of front projection points; S4, performing tangent co-spherical second intersection adjustment by utilizing the pairs of intersection point coordinate and world coordinate of front projection point to acquire structural parameters and coordinate of rotation center of the pan-tilt of the vision measurement system; and S5, establishing an affine space coordinate system.

Abstract: A counterweight of washing machine, a washing machine and a counterweighting method for the washing machine relates to the technical field of washing machines. The technical solutions mainly adopted are as follows: the counterweight of washing machine includes at least one counterweight cavity and at least one pressured water structure; a water entering port for connecting a water entering pipeline and a water draining port for connecting a water draining pipeline are formed on a wall of each of the at least one counterweight cavity; the at least one water pressurizing structure is disposed in each of the at least one counterweight cavity, and is configured to enable water entering each of the at least one counterweight cavity to be in an air-free sealed cavity; the counterweight of washing machine is configured to be fixed on a water containing drum of the washing machine; and the washing machine comprises the counterweight of washing machine.