Abstract: A display apparatus is disclosed The display apparatus includes a display, configured to present an image interface, the image interface includes a render layer and a display layer superimposed: and a controller, configured to obtain a target video resource and one or more recommended video resource associated with the target video resource; control the display layer to present the target video resource and output audio of the target video resource; and control the render layer to present the one or more recommended video resource simultaneously.

Abstract: The present invention relates to a preparation and purification method for cationic quaternary ammonium salt of sodium hyaluronate in homogeneous medium. By adding a homogeneous solvent and a sodium hyaluronate solid to a vessel, heating the vessel until the contents are dissolved to form a homogeneous system, adding an aqueous solution of 2,3-epoxypropyltrimethylammonium chloride (GTA) to the homogeneous system, then adding a base catalyst, and stirring at a preset temperature to carry out a graft reaction, a graft product is obtained wherein 2,3-epoxypropyltrimethylammonium chloride is grafted to the oxygen atom of the hydroxymethyl group of sodium hyaluronate. By using the method, a graft product wherein 2,3-epoxypropyltrimethylammonium chloride is grafted to the oxygen atom of the hydroxymethyl group of sodium hyaluronate is obtained. Addition of salts is avoided during the reaction, a grafting yield up to 0.69 is obtained, and coagulation occurred to the product is effectively solved.

Abstract: The present disclosure provides a method for constructing a correlation model between relative bioavailability and bioaccessibility of cadmium in earthworm, belonging to the technical field of cadmium detection in earthworms. The method includes the following steps: determination of relative bioavailability of cadmium in earthworms, determination of bioaccessibility of cadmium in the earthworm based on an in vitro physiologically-based extraction test (PBET) method, and construction of a correlation model between the relative bioavailability and the bioaccessibility of cadmium in the earthworm. The method enables to directly put the bioaccessibility obtained by the in vitro method into a regression equation to obtain the bioavailability of cadmium in subsequent studies.

Abstract: A method and apparatus for detecting an object. The method includes: inputting a to-be-detected picture into a target detection model, marking at least one region of interest in the picture using the target detection model, and determining an initial confidence that each region of interest contains a preset target object; determining concentration information of an interferent in the picture; and determining, based on the concentration information and the initial confidence corresponding to the region of interest, a target confidence that the region of interest contains the preset target object.

Abstract: A method and apparatus for tracking an object, an electronic device, and a readable storage medium are provided. The method can include: determining an object re-identification feature of each target object in a target frame image, the object re-identification feature comprising position information of each target object; and performing object tracking based on the object re-identification feature of each target object.