Abstract: Disclosed is a 5-methylchromone and the preparation method and application thereof, the 5-methylchromone has the following structure: wherein R1 and R2 are alkyl groups. The substituted chromone has the biological activity of inhibiting tyrosinase. The preparation method uses 3,5-dihydroxytoluene as a raw material, and synthesis of chromones substituted with different groups at 2-C through acylation, esterification, rearrangement and cyclization reactions, etc. The 5-methylchromone is a completely new compound in condition that R1 is —CH2CH2CH3, and R2 is —CH2CH3, or that R1 is —C(CH3)3, and R2 is H. All the compounds have obvious inhibitory activity against tyrosinase, and can be used to prepare tyrosinase inhibitors or whitening agents.

Abstract: An interaction method of audio-video segmentation and apparatus, and a device and a storage medium. The method includes: detecting whether a selected clip exists in a target audio-video; in response to the selected clip existing in the target audio-video, displaying a split button upon detecting that a pointer on a track of the target audio-video is located in the selected clip; and splitting the selected clip, in response to a trigger operation for the split button, based on an intersection position of the pointer and the selected clip. Compared with an interaction means in which a split button resides in a pointer of a track, mis-operations of audio-video splitting can be reduced to the greatest extent, and the usage experience of a user is improved to a certain extent.

Abstract: Provided is a method for resolving an optical isomer from a racemate by using supercritical fluid extraction technology. The method is mainly applied to the separation of a product obtained after enzymatic resolution. Taking a preparation process of D-pantolactone as an example, the key point is to separate D-pantolactone and L-pantolactone from an enzymatic resolution liquid by means of supercritical fluid extraction.

Abstract: A display panel (11) with a low signal transmission power and large cabling space, and a semiconductor display apparatus including the display panel (11) are provided. The display panel (11) includes pixel areas (DB) that are of N rows and M columns and that are connected in a matrix, each pixel area (DB) includes pixel drive modules that are of Q rows and P columns and that are connected in a matrix, each pixel drive circuit (PD) is connected to at least one pixel unit (P), and the pixel drive circuit (PD) drives, based on to-be-displayed image data, the pixel unit (P) to emit light to display an image. All pixel areas (DB) in any column of the pixel areas (DB) are connected to data interfaces (DI) in a same group, and pixel areas (DB) in different columns are connected to data interfaces (DI) in different groups.

Abstract: A semiconductor package comprises a lead frame, a chip, and a molding encapsulation. The lead frame comprises one or more die paddles comprising a first die paddle. The first die paddle comprises one or more through holes, one or more protrusions with grooves on top surfaces of the one or more protrusions, or one or more squeezed extensions. Each of the one or more through holes is filled with a respective portion of the molding encapsulation. Each of the one or more through holes may be of a rectangular shape, a rectangular shape with four filleted corners, a circular shape, or an oval shape. Each of the grooves is filled with a respective portion of the molding encapsulation. A respective side wall of each of the one or more squeezed extensions is of a swallowtail shape. The swallowtail shape directly contacts the molding encapsulation.

Abstract: Provided in the present application are a method and apparatus for training a visual language pre-training model, and a device and a medium. The method includes: acquiring pairing groups respectively corresponding to N images, wherein the pairing group of a first image includes: a first pairing group which is composed of the first image and description text of the first image, and a second pairing group which is composed of a local image of the first image and description text of the local image, N is an integer greater than 1, and the first image is any one of the N images; and training a visual language pre-training model according to the pairing groups respectively corresponding to the N images.

Abstract: The present disclosure provides a light-emitting material and a light-emitting device. The light-emitting material includes a host material and a doping material, where the host material includes an N-type material and a P-type material, and the N-type material includes a compound with a structural formula shown in Formula 1 or Formula 2. In the present disclosure, a turn-on voltage of the light emitting device can be reduced.

Abstract: The present disclosure provides a video processing method, an apparatus, a device and a storage medium. The method includes: after determining a target effect style and determining a target video clip based on presentation of a video to be processed on a timeline, establishing a binding relationship between the target effect style and the target video clip in response to an effect application trigger operation, so as to achieve an effect of applying the target effect style to the target video clip. The embodiment of the present disclosure, by establishing the binding relationship between the target effect style and the target video clip, achieves the effect of effect processing only on a certain video clip of the video, thereby meeting the user's demand of effect processing only on a certain video clip, which increases flexibility of video effect processing, and further improves the user's experience of video effect processing.

Abstract: A multi-order optical modulator and modulation method for on-chip optical matrix calculation are provided. The modulator includes: input waveguides, a 2×2 optical beam splitter, initial phase modulators, multi-order phase modulators, a 2×2 optical beam combiner, and an output waveguide; the input waveguides include a first input waveguide and a second input waveguide; the initial phase modulators include a first initial phase modulator and a second initial phase modulator; the multi-order phase modulators include a first multi-order phase modulator and a second multi-order phase modulator which are connected to the first initial phase modulator and the second initial phase modulator; and two input ends of the 2×2 optical beam combiner are respectively connected to the first multi-order phase modulator, the second multi-order phase modulator, and the output waveguide.

Abstract: A solid-state ion conductor including a compound of Formula 1: Li(3+2y1)B(P1?y1A1y1O4)2??Formula 1 wherein, in Formula 1, A1 is an element of Groups 4, 14, or a combination thereof, and has an oxidation state of +4, and 0<y1<1.

Abstract: Example methods and devices for blood pressure measurements are disclosed herein. The example methods include determining whether to perform blood pressure measurement on a user, and determining a blood pressure measurement mode used to perform the blood pressure measurement based on a degree of impact on a sleep status of the user. In a first measurement mode, the user needs to be prompted to adjust a blood pressure measurement posture to meet a blood pressure measurement requirement. After the user confirms that the posture is adjusted, blood pressure measurement is performed on the user. In a second measurement mode, blood pressure measurement can be performed on the user without prompting the user to adjust a blood pressure measurement posture.

Abstract: Disclosed is a method for optimization design of an artificial reef structure. The method includes: arranging an artificial reef model to be tested on a test platform, testing a flow field to obtain flow field data and a pull force of an artificial reef, analyzing the flow field data to obtain a flow velocity reference point, and carrying out optimization analysis in combination with the flow field data and the pull force.

Abstract: The disclosure provides a catenary icing detection method based on infrared imaging and meteorological monitoring. In the disclosure, infrared illumination is used to detect the target, real-time images of the target are obtained through an infrared imaging sensor, and meteorological data are synchronously obtained through a meteorological monitoring unit, and normalized fusion processing is performed; the data are stored in a front-end edge computing unit, and through the deep learning model, the states of water accumulation, snow accumulation and icing of the target are automatically identified, and then sent to a background system through a transmission unit.

Abstract: The disclosure provides a catenary icing detection method based on infrared imaging and meteorological monitoring. In the disclosure, infrared illumination is used to detect the target, real-time images of the target are obtained through an infrared imaging sensor, and meteorological data are synchronously obtained through a meteorological monitoring unit, and normalized fusion processing is performed; the data are stored in a front-end edge computing unit, and through the deep learning model, the states of water accumulation, snow accumulation and icing of the target are automatically identified, and then sent to a background system through a transmission unit.

Abstract: A solid-state ion conductor including a compound of Formula 1: Li(3+2y1)B(P1-y1A1y1O4)2??Formula 1 wherein, in Formula 1, A1 is an element of Groups 4, 14, or a combination thereof, and has an oxidation state of +4, and 0<y1<1.

Abstract: The system may provide the functionality for posture detection by using a pose detection algorithm on reduced resolution images. The method may comprise receiving an image of a human from a sensor; receiving a placement of a bounding box on the image, wherein the bounding box contains pixel data of the human in the image; acquiring bounding box data from within the bounding box; and determining a pose of the human based on the bounding box data.

Abstract: The disclosure provides a composition comprising CpG ODN and one or more other adjuvants that work together with the immunomodulatory CpG ODN, such as an aluminum adjuvant, wherein the CpG ODN comprises or consists of a nucleotide sequence selected from SEQ ID NOs: 1-4, wherein at least one nucleotide in the nucleotide sequence is a chemically modified nucleotide having a structure of formula (I): wherein, Y is S or O, R is H or a positively charged counterion, B is independently an unmodified or modified nucleobase, and R1 is H, F, CI, OH, OMe, Me, O-ethyloxymethyl. Use of the composition, a pharmaceutical composition comprising the composition, a preparation method thereof, and use of the pharmaceutical composition are also disclosed.

Abstract: The present disclosure provides an effect application previewing method, an apparatus, a device and a storage medium. The method includes: taking, in response to a preview trigger operation for a target effect style, a position of a pointer on a video track as a start point, to generate a virtual video frame for the target effect style; synchronously playing the virtual video frame and at least one video clip corresponding to the virtual video frame on the video track based on a timeline, to preview an effect of the target effect style applied to the at least one video clip.

Abstract: A water boiler with dual heating functionality includes: a hot water tank having an upper section and a lower section; the upper section is narrower than the lower section; the hot water tank comprises an instantaneous heating portion, and a storage heating section; an instantaneous heating pipe arranged within the instantaneous heating portion; a storage heating pipe arranged within the storage heating portion; a water inlet component in communication with a bottom of the hot water tank; a water intake structure in communication with a pressurized water source and the water inlet component; a hot water outlet pipe connected to a top of the hot water tank.