Abstract: The present application relates to a current collector, an electrode plate and a preparation method thereof, an electrode assembly, and a secondary battery. Through holes running through a current collecting body are provided in at least one corner region, so that the electrode assembly formed by winding electrode plates provided with the current collectors may feature the through holes in at least one layer of electrode plate in a bent portion. In this case, during cyclic charging, lithium ions on a convex side and a concave side of the electrode plate may communicate through the through holes, thereby ensuring that intercalated lithium concentrations on two sides of the electrode plate are balanced, reducing the risk of lithium precipitation between the negative electrode plate and the positive electrode plate in the bent portion, and prolonging the service life of the secondary battery.

Abstract: A display device and an operation method of the display device are provided in the present disclosure. The display device includes a display screen a sound-generation driving module, and further includes an acoustic scanning module, arranged on a non-display side of the display screen and configured to determine a spatial contour of a space where the display device is located through acoustic scanning; a viewer position detection module, configured to detect viewer coordinates in the space where the display device is located; and a control module, configured to control the sound-generation driving module to generate sound in accordance with the spatial contour and the viewer coordinates.

Abstract: The invention provides a collaborative optimization method for gas injection huff-n-puff parameters in tight oil reservoirs. The method relates to the technical field of oilfield development parameter optimization, including: (1) establishing the numerical simulation model that accurately describes the actual oil reservoirs; (2) determining the optimization parameters of gas injection huff-n-puff, giving the optimization range of gas injection huff-n-puff parameters and other variable constraints, and establishing an optimization objective function; and (3) using the particle swarm optimization algorithm to solve the objective function constructed based on a collaborative optimization model for gas injection huff-n-puff parameters. Then the optimal gas injection rate, gas injection time, soaking time, and production time after the collaborative optimization for gas injection huff-n-puff parameters of the reservoir are obtained.

Abstract: A composition for polishing surfaces comprises the following components: a) at least one inorganic abrasive component (S) comprising a lanthanide oxide, b) at least one organic dispersing-agent component based on polymer (P), c) at least one organic gelling agent (G) such as gellan gum, d) water as solution or dispersing medium, and e) if appropriate further auxiliary and additive materials and has high stability.

Abstract: A composition for polishing surfaces comprises the following components: a) at least one inorganic abrasive component (S) comprising a lanthanide oxide, b) at least one organic dispersing-agent component based on polymer (P), c) at least one organic gelling agent (G) such as gellan gum, d) water as solution or dispersing medium, and e) if appropriate further auxiliary and additive materials and has high stability.

Abstract: The present invention relates to the use of at least one hydrophobin or at least one hydrophobin derivative in a drilling mud.

Abstract: A process for preparing a paraffin inhibitor formulation comprising (a) preparing a mixture comprising a waxy paraffin inhibitor component having a melting point of >0° C. and an emulsifier component, wherein the mixture is prepared at a first temperature range above the melting point of the waxy paraffin inhibitor; (b) adding water to the mixture to produce an o/w emulsion; and (c) cooling the o/w emulsion to a temperature in a second temperature range which is below the melting point of the waxy paraffin inhibitor. The mixture prepared in step (a) may further comprise water to produce a w/o emulsion, the water being present in a proportion by weight that is lower than the sum of the proportions by weight of the paraffin inhibitor and the emulsifier component. The process may further comprise (d) adding an at least partially water-miscible organic solvent in which the paraffin inhibitor is insoluble.

Abstract: The present invention relates to the use of at least one hydrophobin or at least one hydrophobin derivative in a drilling mud.

Abstract: A method for stabilization of a disperse system which normally is not stable against sedimentation or creaming comprising the step of adding to said disperse system at least one network-inducing component, e.g. a water-soluble polymer, leads to particularly stable disperse systems.