Abstract: The present invention discloses a nitroxoline derivative, a preparation method therefor, and use thereof. Specifically, the present discloses a compound as represented by general formula (I), a preparation method therefor, a pharmaceutical composition containing same, and use thereof in treating infectious diseases or cancers. The compound of the present invention has excellent anti-tumor activity and antibacterial activity, and can be developed into a drug for treating tumors and infectious diseases. The definition of each group in general formula (I) is the same as that in the description.

Abstract: A one-time programmable (OTP) memory cell includes a substrate having a first conductivity type and having an active area surrounded by an isolation region, a transistor disposed on the active area, and a capacitor disposed on the active area and electrically coupled to the transistor. The capacitor comprises a diffusion region of a second conductivity type in the substrate, a metallic film in direct contact with the active area, a capacitor dielectric layer on the metallic film, and a metal gate surrounded by the capacitor dielectric layer. The diffusion region and the metallic film constitute a capacitor bottom plate.

Abstract: Systems and methods are disclosed for securing a network, for admitting new nodes into an existing network, and/or for securely forming a new network. As a non-limiting example, an existing node may be triggered by a user, in response to which the existing node communicates with a network coordinator node. Thereafter, if a new node attempts to enter the network, and also for example has been triggered by a user, the network coordinator may determine, based at least in part on parameters within the new node and the network coordinator, whether the new node can enter the network.

Abstract: A circuit board utilizing the better and faster performance of optical signals includes interconnected first, second, and third areas. The first area includes a first circuit substrate, and a first coupling element and a chip connected thereon. The second area includes an optical fiber within an insulating layer. The third area includes a second circuit substrate, and a second coupling element and an electronic element connected thereon. The first coupling element and the second coupling element are optically aligned with the optical fiber for signal reception and transmission. A method for manufacturing such composite circuit board is also disclosed.

Abstract: A semiconductor device includes a substrate having a high electron mobility transistor (HEMT) region and a capacitor region, a first mesa isolation on the HEMT region, a HEMT on the first mesa isolation, a second mesa isolation on the capacitor region, and a capacitor on the second mesa isolation. The semiconductor device further includes buffer layer between the substrate, the first mesa isolation, and the second mesa isolation, in which bottom surfaces of the first mesa isolation and the second mesa isolation are coplanar.

Abstract: A method for fabricating a semiconductor device includes the steps of providing a substrate having a high electron mobility transistor (HEMT) region and a capacitor region, forming a first mesa isolation on the HEMT region and a second mesa isolation on the capacitor region, forming a HEMT on the first mesa isolation, and then forming a capacitor on the second mesa isolation.

Abstract: A ternary precursor of a lithium ion battery as well as a preparation method and preparation device thereof are provided. A chemical general formula of the ternary precursor is NixCoyMnz(OH)2, 0.5?x?0.9, 0.05?y?0.3, and x+y+z=1. A particle size D50 of a large-particle ternary precursor is 10.0-16.0 ?m, a particle size D50 of a small-particle ternary precursor is 3.0-6.0 ?m, and a span is 0.2-0.8. A nucleation and growth process of a crystal is regulated through a staged EDCF, a crystal particle size meeting specific requirements and compact particles without a cracking phenomenon can be obtained. A disc, inclined blades and an arc surface are combined, and an arc-shaped curved surface can effectively reduce a turbulence energy dissipation rate of a local area.

Abstract: Systems and methods are disclosed for securing a network, for admitting new nodes into an existing network, and/or for securely forming a new network. As a non-limiting example, an existing node may be triggered by a user, in response to which the existing node communicates with a network coordinator node. Thereafter, if a new node attempts to enter the network, and also for example has been triggered by a user, the network coordinator may determine, based at least in part on parameters within the new node and the network coordinator, whether the new node can enter the network.

Abstract: A high electron mobility transistor (HEMT) includes a carrier transit layer, a carrier supply layer, a main gate, a control gate, a source electrode and a drain electrode. The carrier transit layer is on a substrate. The carrier supply layer is on the carrier transit layer. The main gate and the control gate are on the carrier supply layer. A fluoride ion doped region is formed right below the main gate in the carrier supply layer. The source electrode and the drain electrode are at two opposite sides of the main gate and the control gate, wherein the source electrode is electrically connected to the control gate by a metal interconnect. The present invention also provides a method of forming a high electron mobility transistor (HEMT).

Abstract: A preparation method for an aromatic ether compound. The preparation method comprises the following step: c) in a solvent, in the presence of a catalyst and alkali, a compound V reacts with a compound 6 to obtain a compound VII, wherein the solvent is a solvent system having two or more elements selected from water, tetrahydrofuran, 2-methyltetrahydrofuran, ethyl acetate, and dioxane. According to the preparation method for the aromatic ether compound in the present invention, the conversion rate of the reaction can be greatly improved, and thus the yield of the step and the total yield of the whole reaction route are improved; post-treatment and purification operations for preparing the compound VII are greatly simplified, and the compound VII having high purity can be obtained only be simply filtering a reaction solution and washing and drying a filter cake. The preparation method is suitable for industrial scale-up production.

Abstract: A resistor-transistor-logic circuit with GaN structures, including a 2DEG resistor having a drain connected with an operating voltage, and a logic FET having a gate connected to an input voltage, a source grounded and a drain connected with a source of the 2DEG resistor and connected collectively to an output voltage.

Abstract: A resistor with GaN structures, including a GaN layer with a 2DEG resistor region and an undoped polysilicon resistor region, an AlGaN barrier layer on the GaN layer in the 2DEG resistor region, multiple p-type doped GaN capping layers arranged on the AlGaN barrier layer so that the GaN layer not covered by the p-type doped GaN capping layers in the 2DEG resistor region is converted into a 2DEG resistor, a passivation layer on the GaN layer, and an undoped polysilicon layer on the passivation layer in the undoped polysilicon resistor region and functions as an undoped polysilicon resistor.

Abstract: The present disclosure provides a character recognition model training method and apparatus, a character recognition method and apparatus, a device and a medium, relating to the technical field of artificial intelligence, and specifically to the technical fields of deep learning, image processing and computer vision, which can be applied to scenarios such as character detection and recognition technology. The specific implementing solution is: partitioning an untagged training sample into at least two sub-sample images; dividing the at least two sub-sample images into a first training set and a second training set; where the first training set includes a first sub-sample image with a visible attribute, and the second training set includes a second sub-sample image with an invisible attribute; performing self-supervised training on a to-be-trained encoder by taking the second training set as a tag of the first training set, to obtain a target encoder.

Abstract: Systems and methods are disclosed for securing a network, for admitting new nodes into an existing network, and/or for securely forming a new network. As a non-limiting example, an existing node may be triggered by a user, in response to which the existing node communicates with a network coordinator node. Thereafter, if a new node attempts to enter the network, and also for example has been triggered by a user, the network coordinator may determine, based at least in part on parameters within the new node and the network coordinator, whether the new node can enter the network.

Abstract: A method for recognizing text includes: obtaining a first feature map of an image; for each target feature unit, performing a feature enhancement process on a plurality of feature values of the target feature unit respectively based on the plurality of feature values of the target feature unit, in which the target feature unit is a feature unit in the first feature map along a feature enhancement direction; and performing a text recognition process on the image based on the first feature map after the feature enhancement process.

Abstract: A semiconductor device includes a substrate having a high electron mobility transistor (HEMT) region and a capacitor region, a first mesa isolation on the HEMT region, a HEMT on the first mesa isolation, a second mesa isolation on the capacitor region, and a capacitor on the second mesa isolation. The semiconductor device further includes buffer layer between the substrate, the first mesa isolation, and the second mesa isolation, in which bottom surfaces of the first mesa isolation and the second mesa isolation are coplanar.

Abstract: A charging circuit, an adapter, and a charging system and method are applied to a charging process of a terminal device. The terminal device may be charged by using an adapter having no electrolytic capacitor, which is conducive to achieving miniaturization of the adapter. When a voltage of a charging interface of the terminal device is low, the charging circuit may discharge by using a terminal battery, to maintain the voltage of the charging interface. The charging circuit may also decrease a charging current provided to the terminal battery, to maintain the voltage of the charging interface. The voltage of the charging interface may be equivalent to a voltage of an output interface of the adapter.

Abstract: An image recognition method and an electronic apparatus configured for image recognition are provided. A training sample set is provided to train a recognition model including neural networks to recognize a classification label to which an image to be tested belongs through the trained recognition model. The training sample set includes image sets respectively belonging to users. During the training process, training images corresponding to classification labels are obtained from a first image set in the training sample set as reference images for training; a training image is obtained from a second image set different from the first image set as an input image for training; the reference images for training and the input image for training are obtained as inputs to the neural networks for training. The input to each neural network includes at least one of the reference images for training and the input image for training.

Abstract: This application provides a controller and control system for a DC/DC converter. The DC/DC converter includes a first switching transistor, a second switching transistor, a first capacitor, and a transformer. The transformer includes an excitation inductor and a transformer leakage inductor. The controller controls the first switching transistor to turn on to form a first closed circuit, where a current in the excitation inductor increases in a first direction; when a preset time period expires, the controller controls the first switching transistor to turn off, so that a voltage at two ends of the second switching transistor decreases; and when the voltage at the two ends of the second switching transistor is a first preset voltage threshold, the controller controls the second switching transistor to turn on to form a second closed circuit. When embodiments of this application are implemented, a turn-on loss in the DC/DC converter can be reduced.

Abstract: A method for text recognition is disclosed. The method includes obtaining a whole-image scenario for an image to be processed and a text image in the image to be processed. The method further includes determining a first text recognition model corresponding to the whole-image scenario. The method further includes performing text recognition on the text image according to the first text recognition model to obtain text information.