Abstract: A preparation method for a solar cell back electrode and an application thereof are provided. The method comprises setting a back electrode barrier layer and using back-side silver paste in coordination. The back electrode barrier layer comprises the following components: 20 to 80 parts by weight of metal nitride powder, nitrogen-silicon compound powder, oxide powder or low-melting-point metal powder in total; 0.5 to 5 parts by weight of lead-free glass powder; 10 to 40 parts by weight of organic carrier; and 0.1 to 1 part by weight of organic additives. The back-side silver paste comprises the following components: 5 to 60 parts by weight of hollow spherical silver powder; 5 to 30 parts by weight of flaky silver powder; 0.5 to 5 parts by weight of lead-free glass powder; 10 to 50 part by weight of organic binder; and 0.1 to 1 part by weight of organic additives.

Abstract: A method for preparing a P-type crystalline silicon rear electrode, comprising: printing an all-aluminum paste on a P-type crystalline silicon rear passivation layer, then printing a linear interlayer-glass paste on the all-aluminum paste, and finally overprinting rear silver electrodes on the linear middle layer-glass paste. In a solar cell prepared using the method, good contact with silver and aluminum is kept without causing damage to the passivation layer and compromising the conductivity. In the present invention, a complete all-aluminum back surface field can be formed, leading to an improved field passivation property of an electrode region and reduced carrier recombination.

Abstract: The present invention provides an information traceability method and system based on a blockchain. The method includes: receiving a traceability request, where the traceability request includes a type label, a time label, and a content label; accessing information path data pre-stored in the blockchain based on the type label to obtain target path data, where the target path data is single-source path data or multi-source path data; determining a corresponding primary data set based on the time label, where the target path data includes a plurality of primary data sets; determining a corresponding secondary data set based on the content label, where the primary data set includes at least one secondary data set; and extracting path information from the secondary data set, and obtaining at least one information source based on the path information.

Abstract: The present disclosure relates to random access methods, apparatus, and devices. One example method includes adjusting a sweeping parameter of a receive beam when at least one target receive beam is determined based on prior information, and sweeping the receive beam based on the adjusted sweeping parameter. The prior information includes at least one of cell historical information or cell handover information. The sweeping parameter includes at least one of a sweeping frequency, a sweeping sequence, a beam direction, or a beam width. The receive beam includes the at least one target receive beam. The receive beam is used to receive a random access preamble sent by a terminal. After a base station receives, on the receive beam, the random access preamble sent by the terminal, the terminal randomly accesses the base station for data communication.

Abstract: Disclosed are a polypeptide vaccine coupled with a TLR7 agonist for novel coronavirus and the use thereof. Specifically, the present invention provides a vaccine polypeptide for novel coronavirus pneumonia based on the basis of the analytical study of the RBD sequence and structural information of the S protein of SARS-CoV-2, wherein the vaccine polypeptide has the following structural formula: Z-(J-U)n, where in the formula, Z, J, U, n, etc. are as defined in the description. Also provided in the present invention are a vaccine composition containing the vaccine polypeptide and the use thereof.

Abstract: The present disclosure relates to a crystal form of a macrocyclic tyrosine kinase inhibitor and a preparation method therefor, specifically relates to a crystal form of a compound represented by Formula (I) and a preparation method therefor, a pharmaceutical formulation and pharmaceutical composition containing the crystal form, and an application thereof in preparing drugs for treating and/or preventing pain, inflammation, cancer, neurodegenerative diseases, and autoimmune diseases mediated by one or more tyrosine kinase receptors in a tropomyosin receptor kinase (TRK), an anaplastic lymphoma kinase (ALK) and/or a c-ros oncogene 1 receptor kinase (ROS1).

Abstract: An information transmission method includes receiving capability enquiry signaling from a network device. The method also includes sending capability information of a terminal to the network device. The capability information includes a first capability item and dual active protocol stack (DAPS) capability information supported by the terminal and corresponding to the first capability item, or the capability information includes the first capability item and the DAPS capability information supported by the terminal and corresponding to the first capability item, and a second capability item and carrier aggregation (CA) capability information supported by the terminal and corresponding to the second capability item.

Abstract: The present invention is directed to tetramaleimide linkers and use thereof, more specifically to the compounds represented by formula I and their use in the preparation of antibody-drug conjugates (ADCs). The ADCs obtained from the tetramaleimide linkers have high homogeneity and stability, and could be used effectively for the treatment of various diseases including tumors. The definition of the groups in formula I is the same as that in the description.

Abstract: The present invention provides an information traceability method and system based on a blockchain. The method includes: receiving a traceability request, where the traceability request includes a type label, a time label, and a content label; accessing information path data pre-stored in the blockchain based on the type label to obtain target path data, where the target path data is single-source path data or multi-source path data; determining a corresponding primary data set based on the time label, where the target path data includes a plurality of primary data sets; determining a corresponding secondary data set based on the content label, where the primary data set includes at least one secondary data set; and extracting path information from the secondary data set, and obtaining at least one information source based on the path information.

Abstract: The application provides a current detecting circuit, including a current transformer having a primary winding for receiving a current to be detected and a secondary winding for generating a sampling current; a demagnetizing circuit for demagnetizing the current transformer; a chip selection circuit electrically connected to the demagnetizing circuit, and operably switched between a first mode and a second mode; a sampling circuit electrically connected to the chip selection circuit to sample the sampling current, and outputting a sampling signal to a controller; and a clamping circuit electrically connected between the sampling circuit and the controller, and configured for providing a reference potential. The application further provides a converter including the current detecting circuit.

Abstract: The present disclosure discloses a type of front finger paste for N-type solar cells. In parts by weight, the raw materials for preparing the paste include 1-5 parts of high-activity glass powder, 1-5 parts of silicon powder, 75-79 parts of aluminum-silicon alloy powder and 15-20 parts of organic component. The front finger paste for N-type solar cells and its preparation method provided by the present disclosure use aluminum paste to replace the aluminum-doped silver paste used in the existing technologies, thus reducing the production cost of N-type solar cells; and the high-activity glass powder contained in the aluminum paste can eliminate the grooving process before printing, thus simplifying the process steps, and it does not damage the passivation layer and can improve the electrical performance of the solar cell.

Abstract: A mobile phone transfers a picture to the tablet. After the mobile phone detects a sliding operation of a finger of a user, the tablet displays, on a screen, an animation in which the picture is transferred in a sliding direction of the finger of the user.

Abstract: Embodiments of this application relate to the field of communication technologies, and provide a user equipment UE capability information reporting method and a device. The method includes: UE receives UE capability enquiry information from a network device, where the UE capability enquiry information is used to query a capability of the UE. The UE sends UE capability information to the network device based on the UE capability enquiry information, where the UE capability information is used to indicate that the UE supports a first-type band combination, and the first-type band combination includes a band combination including an intra-band ENDC band combination and NRCA. The UE capability information includes first information and second information, the first information includes a first bandwidth combination set of the intra-band ENDC supported by the UE, and the second information includes a second bandwidth combination set of the NRCA supported by the UE.

Abstract: A method and a device of controlling the position of the X-ray tube of a computed tomography (CT) system may include: acquiring an AP signal output by an AP sensor of the CT system, an IP signal output by an IP sensor and encoder data output by a motor, determining a homing positioning signal AP0 of the AP signal based on the AP signal and the IP signal, where the homing positioning signal AP0 is used to determine the starting point of the period of rotation of the X-ray tube, utilizing the encoder data to calculate the encoder data containing AP signal based on the determined homing positioning signal AP0, where the encoder data containing AP signal is the AP signal processed by use of the encoder data, and controlling the position of the X-ray tube based on the encoder data containing AP signal.

Abstract: The present invention relates to a method for metallizing a front electrode of an N-type solar cell, including: treating an N-type crystalline silicon substrate to form a p+ doped region and a front surface passivation anti-reflection coating on a front surface of the N-type crystalline silicon substrate in an inside-out sequence, printing an aluminum paste on the front surface passivation anti-reflection coating to form a first finger, overprinting a silver paste on the first finger to form a second finger, and printing a front silver paste on the first finger to form a busbar. In the present invention, the superposition of the second finger on the first finger can reduce line resistance while ensuring a good ohmic contact, which further improves the photoelectric conversion efficiency of solar cells. Moreover, since no grooving procedure is required, the process is simplified and cost-efficient.

Abstract: The present invention relates to a glass powder and a silver-aluminum paste for use on a front of an N-type double-sided solar cell comprising a conductive silver powder, a silicon-aluminum alloy powder, the glass powder and an organic vehicle. The glass powder comprises the following components by weight: 0-50% of PbO, 0-50% of BiO, 5-15% of B2O3, 8-9% of SiO2, 2-3% of Al2O3 and 5-15% of ZnO; silicon and aluminum in the glass powder have a mass ratio of 4:1-5:1; the conductive silver powder has a content of 80-90 wt %; the conductive silver powder comprises a nano-silver powder and a silver alloy powder, and the nano-silver powder to the silver alloy powder have a mass ratio of 1:18-1:90.

Abstract: Based on 100 wt % of the alloy aluminum paste, the alloy aluminum paste includes the following components in percentages by weight: 35-56.5% of an aluminum-silicon alloy powder, 17.5-37.5% of an aluminum powder, 1-2% of a lead-free glass powder, 15-20% of an organic solvent, 3-5% of ethyl cellulose, 0.05-0.1% of a thixotropic agent and 0.5-1.5% of a dispersant. The alloy paste can be applied to a PERC solar cell having a passivation coating opening consisting of 0.5-1% of the area of the solar cell. When the alloy aluminum paste is applied to a PERC solar cell having a low opening rate, particularly a rear electrode having a passivation coating opening consisting of 0.5-1% of the area of the solar cell.

Abstract: A low temperature-sintering rear silver paste for an all-aluminum back surface field crystalline silicon solar cell includes the following components in part by mass: 50-70 parts of a nano-silver powder, 20-50 parts of an organic vehicle, 0.1-0.3 parts of a dispersant and 0.1-0.3 parts of a thixotropic agent. The nano-silver powder adopted in the present invention has good sintering activity, and thus is suitable for sintering at low temperature. In addition, part of the silver paste will permeate into a rear aluminum paste in the process of sintering to form good silver-aluminum contact.

Abstract: Embodiments of this application provide a method for reporting user equipment capability information and related device. A user equipment (UE) receives user equipment capability enquiry information sent by a network device, and reports the carrier aggregation capability of the user equipment by sending user equipment capability information to the network device, where the carrier aggregation capability of the user equipment includes the information that the downlink carriers of the UE in different radio access technologies are contiguous and the uplink carriers of the UE in the different radio access technologies are non-contiguous.

Abstract: A method for preparing a P-type crystalline silicon rear electrode, comprising: printing an all-aluminum paste on a P-type crystalline silicon rear passivation layer, then printing a linear interlayer-glass paste on the all-aluminum paste, and finally overprinting rear silver electrodes on the linear middle layer-glass paste. In a solar cell prepared using the method, good contact with silver and aluminum is kept without causing damage to the passivation layer and compromising the conductivity. In the present invention, a complete all-aluminum back surface field can be formed, leading to an improved field passivation property of an electrode region and reduced carrier recombination.