Abstract: Embodiments of the present disclosure provide a solar cell and a photovoltaic module. The solar cell includes: a substrate having a front surface and a rear surface, a first doped polycrystalline silicon layer doped with N-type dopant ions and disposed over the front surface or over the rear surface, and a second doped polycrystalline silicon layer doped with P-type dopant ions and disposed over the rear surface. A surface of the first doped polycrystalline silicon layer away from the substrate has a plurality of first protrusion structures. A surface of the second doped polycrystalline silicon layer away from the substrate has a plurality of second protrusion structures. An average thickness of the first protrusion structures is greater than an average thickness of the second protrusion structures, and a thickness of the first doped polycrystalline silicon layer is not greater than a thickness of the second doped polycrystalline silicon layer.

Abstract: Disclosed are a solar cell and a photovoltaic module. The solar cell includes a substrate, having a first surface, having a metal pattern region and a non-metal pattern region, a first passivation contact structure, located in the metal pattern region and including a first tunneling layer and a first doped conductive layer stacked in a direction away from the substrate, and a second passivation contact structure, including a second tunneling layer and a second doped conductive layer stacked in the direction away from the substrate, and having a first portion over the non-metal pattern region and a second portion over the first passivation contact structure, and a top surface of the first portion of the second passivation contact structure is not further away from the substrate than a top surface of the second portion of the second passivation contact structure.

Abstract: A method of forming a semiconductor device includes: forming a metal gate structure over a fin that protrudes above a substrate, the metal gate structure being surrounded by an interlayer dielectric (ILD) layer; recessing the metal gate structure below an upper surface of the ILD layer distal from the substrate; after the recessing, forming a first dielectric layer over the recessed metal gate structure; forming an etch stop layer (ESL) over the first dielectric layer and the ILD layer; forming a second dielectric layer over the ESL; performing a first dry etch process to form an opening that extends through the second dielectric layer, through the ESL, and into the first dielectric layer; after the first dry etch process, performing a wet etch process to clean the opening; and after the wet etch process, performing a second dry etch process to extend the opening through the first dielectric layer.

Abstract: A neural network-based method for predicting aerodynamic performance of a compressor of modeling design and a system therefor are provided. The method includes: constructing a data set; constructing a loss function, wherein the loss function is constructed based on a similarity modeling criterion; training a momentum-optimized neural network model according to the data set and the loss function to obtain an aerodynamic performance prediction model of the compressor of modeling design; predicting an aerodynamic performance of the compressor of modeling design by using the aerodynamic performance prediction model of the compressor of modeling design. According to the method, the momentum-optimized neural network model is trained by using the constructed data set and the loss function constructed based on the similarity modeling criterion, and the deep learning technology is applied to the aerodynamic performance prediction of the compressor of modeling design.

Abstract: Disclosed are a solar cell and a photovoltaic module. The solar cell includes a substrate and a doped semiconductor layer disposed on the substrate. The solar cell further includes holes distributed across an edge region of the doped semiconductor layer, and a respective hole of the holes extending through at least the doped semiconductor layer and being filled with a passivation material. The solar cell further includes a passivation layer formed on a side of the doped semiconductor layer away from the substrate, and a plurality of electrodes arranged at intervals along a first direction, extending through the passivation layer and in electrical contact with the doped semiconductor layer.

Abstract: An electronic device includes an image sensor and one or more processors operable with the image sensor. The one or more processors are operable to dynamically and automatically select-exposure values using a camera response function for the image sensor for a sequence of images to generate an HDR image. The one or more processors can cause the image sensor to capture the sequence of images using the exposure values selected and can fuse the sequence of images to create the HDR image.

Abstract: A solar cell, a method for manufacturing the same, and a photovoltaic module are provided. The solar cell includes a substrate, first and second doped parts, and first electrodes. The substrate has a first surface including first regions and second regions arranged alternatingly in a first direction. Each of the first and second doped parts is located on a corresponding first and second region, respectively and is separated from each other. Each first electrode and a third doped part are located on the corresponding first doped part. On the first doped part, the third doped part is located on at least one side of the first electrode in the first direction and is separated from the adjacent first electrode. The first doped parts are doped with dope elements different from the second doped parts and the third doped parts.

Abstract: Disclosed are a solar cell, a tandem solar cell, and a photovoltaic module. The solar cell includes a substrate, a doped semiconductor layer, a passivation layer and a plurality of electrodes. The substrate is provided with textured structures on a portion of a surface of the substrate. The doped semiconductor layer is disposed on the substrate. The solar cell further includes holes extending through the doped semiconductor layer, and corresponding to the textured structures, respectively, and a bottom of a respective hole exposes at least a portion of a corresponding textured structure. The passivation layer is formed over a surface of the doped semiconductor layer away from the substrate, fills the holes. The plurality of electrodes are arranged along a first direction, pass through the passivation layer and are in electrical contact with the doped semiconductor layer.

Abstract: The present disclosure relates to engineered penicillin G acylase (PGA) enzymes having improved properties, polynucleotides encoding such enzymes, compositions including the enzymes, and methods of using the enzymes.

Abstract: A photo resist layer is used to protect a dielectric layer and conductive elements embedded in the dielectric layer when patterning an etch stop layer underlying the dielectric layer. The photo resist layer may further be used to etch another dielectric layer underlying the etch stop layer, where etching the next dielectric layer exposes a contact, such as a gate contact. The bottom layer can be used to protect the conductive elements embedded in the dielectric layer from a wet etchant used to etch the etch stop layer.

Abstract: The present disclosure relates to a video transmission method, an electronic device and a computer readable medium. The method is applied to a first application installed in a first terminal, where the first terminal is further installed with a second application. The method includes: acquiring a current video frame; performing special effect processing on the current video frame according to a received special effect setting instruction, and generating a target video frame; and sending the target video frame to the second application. Thus, the first application can be matched with any second application that needs to use a special effect processing function, and the second application can be enabled to obtain a special effect-processed video on the premise that the second application does not need to be redeveloped.

Abstract: A solar cell includes a substrate having a front surface and a back surface opposite to the front surface; a first passivation layer, a second passivation layer and a third passivation layer sequentially formed on the front surface of the substrate and in a direction away from the substrate; where the first passivation layer includes a dielectric material; the second passivation layer includes a first SiuNv material, and a value of v/u is 1.3?v/u?1.7; and the third passivation layer includes a SirOs material, and a value of s/r is 1.9?s/r?3.2; and a tunneling oxide layer and a doped conductive layer sequentially formed on the back surface of the substrate and in a direction away from the back surface; the doped conductive layer and the substrate are doped to have a same conductivity type.

Abstract: A light-emitting device and an OLED display panel are provided. The light-emitting device includes a charge generation layer. The charge generation layer includes an N-type electron generation layer, a P-type hole generation layer, and a metal activation layer disposed between the two. The metal activation layer is in surface contact with of the N-type electron generation layer and the P-type hole generation layer. It activates a surface energy at contact surfaces, prevents an accumulation of charges to form an electric field in an internal space, and improves a performance and a lifespan of the light-emitting device.

Abstract: Embodiments of the present disclosure relate to a solar cell and a photovoltaic module. The solar cell includes: a substrate, a tunneling layer formed on a rear surface of the substrate, and a doped conductive layer formed on the tunneling layer. The tunneling layer includes first regions and second regions, the first regions interleave with the second regions in a first direction, and the first regions include first dopant atoms. The doped conductive layer includes first doped regions formed on the first regions and second doped regions formed on the second regions. The first doped regions and the second doped regions have different doping types, the first doped regions include the first dopant atoms, and an atomic percentage of the first dopant atoms in the first doped regions is lower than an atomic percentage of the first dopant atoms in the first regions.

Abstract: A solar cell includes: a substrate having a front surface and a opposite rear surface; a first dielectric layer formed over the rear surface; a first doped conductive layer formed over a surface of the first dielectric layer away from the substrate; grooves arranged alternatingly in a first direction, penetrating the first doped conductive layer and the first dielectric layer, and extending into inside of the substrate; a second dielectric layer formed over a bottom surface of the grooves; a second doped conductive layer formed over a surface of the second dielectric layer away from the substrate; and a doped layer aligned with the second doped conductive layer and located between the second dielectric layer and the substrate. The first doped conductive layer and the doped layer are doped with a first dopant element, and the substrate and the second doped conductive layer are doped with a second dopant element.

Abstract: Provided are a solar cell, a method for preparing a solar cell, and a photovoltaic module, relating to the field of photovoltaics. The solar cell includes a substrate, a dielectric layer and a doped semiconductor layer which are stacked, a passivation layer, and electrodes. The substrate has a first surface. The first surface includes an edge region and a center region. The edge region surrounds the center region. The edge region is substantially flush with or closer to the second surface than the center region. The dielectric layer is formed over the center region. The passivation layer covers the edge region and a surface of the doped semiconductor layer facing away the dielectric layer. The electrodes are located in the center region, and penetrate the passivation layer in a thickness direction to be in electrical contact with the doped semiconductor layer.

Abstract: Systems, methods, and apparatus, including computer programs encoded on computer-readable media, for detecting downhole measured depth of a borehole are disclosed. A downhole imaging tool of a drilling system may obtain azimuthal borehole images from at least a first sensor and a second sensor of the downhole imaging tool. Image cross-correlation is performed on the azimuthal borehole images. A time delay is determined based on the image cross-correlation on the azimuthal borehole images. A velocity of the downhole imaging tool is determined based on the time delay. A downhole measured depth of the downhole imaging tool within the borehole is determined based on the velocity. The downhole measured depth may be determined dynamically downhole by the downhole imaging tool without communications with surface equipment of the drilling system.

Abstract: Disclosed in the present invention are a permanent-magnet magnetic levitation rail transit control system and method based on 5G communication technology. The system comprises: an intelligent control center, a 5G communication platform, a train security system, an Internet of things monitoring system, and a passenger service system. In the present invention, targeted at the problem of being difficult to ensure barrier-free transmission of signals even by means of beamforming technology due to high moving speed of a permanent-magnet magnetic levitation rail transit system and small coverage of 5G base stations, a multi-connectivity scheme is used, and the intelligent control center selects two 5G base stations for signal transmission at the same time depending on distribution of 5G base stations along a line, wherein one 5G base station is the current closest base station, and the other 5G base station is the next base station to be approached.

Abstract: A solar cell is provided, including: a substrate having a first surface including first regions and second regions, a first passivation contact structure formed on the first and second regions, second passivation contact structures formed on the first passivation contact structure, first passivation films formed on the first passivation contact structure, and first electrodes extending in a second direction perpendicular to the first direction. Each second passivation contact structure has an orthographic projection on the first surface in a respective first region, and each first passivation film has an orthographic projection on the first surface in a respective second region. Each first electrode covers a top surface of a respective second passivation contact structure and at least part of two opposing sidewalls of the respective second passivation contact structure in the first direction, and is in electrical contact with the respective second passivation contact structure.

Abstract: A solar cell, a method for producing a solar cell and a solar cell module are provided. The solar cell includes: a substrate having a front surface and a rear surface opposite to the front surface; a first passivation layer, a second passivation layer and a third passivation layer sequentially formed on the front surface and in a direction away from the front surface; wherein the first passivation layer includes a dielectric material; the second passivation layer includes a first silicon nitride SimNn material, and a ratio of n/m is 0.5˜1; the third passivation layer includes a silicon oxynitride SiOiNj material, and a ratio of j/i is 0.1˜0.6; and a tunneling oxide layer and a doped conductive layer sequentially formed on the rear surface and in a direction away from the rear surface, wherein the doped conductive layer and the substrate have a doping element of a same conductivity type.