Abstract: This application describes examples of a direct current combiner box, a photovoltaic power generation system, and a fault detection method. In one example, the direct current combiner box includes a fault detection unit, a protection circuit, and a boost circuit. The fault detection unit detects an operating parameter of the direct current combiner box. The protection circuit sends a protection signal to the boost circuit when the operating parameter meets a specified condition. The protection signal is used to enable the boost circuit to adjust a first voltage of a photovoltaic array at an input end of the direct current combiner box to a second voltage. After receiving the protection signal, the boost circuit adjusts the first voltage of the photovoltaic array at the input end of the direct current combiner box to the second voltage.

Abstract: Disclosed are a single-phase-to-ground protection method and system for an active power distribution network. The method includes: acquiring current and voltage data of a line in real time by means of a power distribution terminal, and calculating active power of the line; recording and storing the active power of the line to form an active power curve; performing data statistics according to the active power curve; calculating a direction compensation coefficient and a zero-sequence current compensation coefficient on the basis of statistical data; and detecting whether a single-phase-to-ground fault occurs to the line, where when the single-phase-to-ground fault occurs to the line, a transient-state zero-sequence direction and a steady-state zero-sequence direction are compensated, or a zero-sequence current is compensated, it is determined that the single-phase-to-ground fault occurs to the line when compensation results satisfy action conditions, and tripping is performed or an alarm is given.

Abstract: A power conversion system includes a controller, M direct current conversion units, a bus capacitor, and an inverter unit. An input end of each of the M direct current conversion units is connected to one direct current power supply. Output ends of the M direct current conversion units are connected in parallel and then connected to an input end of the inverter unit. The bus capacitor is connected in parallel to the input end of the inverter unit. The controller is configured to control N direct current conversion units in the M direct current conversion units to adjust output currents/input currents in response to an amplitude of a ripple current of the bus capacitor being greater than a first threshold, to decrease the amplitude of the ripple current of the bus capacitor. M is greater than or equal to 2, and N is a positive integer less than M.

Abstract: A packaged power semiconductor device includes a power semiconductor wafer, a heat conduction layer, and a heat sink that are sequentially stacked, and a sealing part configured to wrap and seal the power semiconductor wafer and at least part of the heat conduction layer. The packaged power semiconductor device further includes a pin, where the pin includes a connection segment wrapped inside the sealing part, and an extension segment located outside the sealing part. The connection segment is electrically connected to the power semiconductor wafer, and a shortest distance between the extension segment and a first outer surface is greater than a creepage distance corresponding to a highest working voltage of the power semiconductor wafer. This can avoid a creepage phenomenon of the pin by limiting a distance between the first outer surface and the extension segment that is of the pin and that is exposed outside the sealing part.

Abstract: A precoding matrix determination method, performed by a base station, includes: obtaining channel characteristic information qk,t and a compression rate parameter ? from a user equipment (UE), in which k is used to indicate a kth UE and t is used to indicate a timestamp; and determining precoding matrices Ft and Wt based on the compression rate parameter ? and the channel characteristic information qk,t.

Abstract: A reporting method, performed by a user equipment (UE), includes: sending a session request message to a network device. The session request message includes capability information reported by the UE, and the capability information comprises at least one of: indication information for indicating whether the UE supports a computing power sharing function; or computing power parameters of the UE.

Abstract: One aspect of the present invention is concerned with a method of preparing a catalyst for use in synthesizing ammonia from nitrate. The method has the steps of i) providing a nickel foam material, ii) removing an oxide layer on the nickel foam material, iii) subjecting the nickel foam material to cooper sulphate (Cu2SO4) solution for a predetermined period of time for forming a copper (Cu) dopped nickel foam electrode, and iv) subjecting the Cu dopped nickel foam electrode to an annealing treatment at a predetermined temperature for a predetermined period of annealing time in atmospheric air thus forming a catalyst of copper oxide-nickel oxide nickel foam (CuO/NiO@NF) with a heterostructure. Other aspects of the invention are concerned with a method of preparing an electrolytic cell for use in synthesizing of ammonia, and a method of synthesis of ammonia from nitrate.

Abstract: A computer-implemented method, according to one embodiment, includes: receiving copies of notes that were originally recorded by participants, the notes corresponding to a source document. Note fragments in the received copies of notes are identified and one or more machine learning models are used to compare the identified note fragments to pages and paragraphs in the source document that the respective note fragments are located in. Based at least in part on the comparison, the identified note fragments are merged with a copy of the source document to form a pseudo-source document. Furthermore, the pseudo-source document is output.

Abstract: In implementations of the subject matter as described herein, there is provided a method for forgery detection of a face image. Subsequent to inputting a face image, it is detected whether a blending boundary due to the blend of different images exists in the face image, and then a corresponding grayscale image is generated based on a result of the detection, where the generated grayscale image can reveal whether the input face image is formed by blending different images. If a visible boundary corresponding to the blending boundary exists in the generated grayscale image, it indicates that the face image is a forged image; on the contrary, if the visible boundary does not exist in the generated grayscale image, it indicates that the face image is a real image.

Abstract: The present disclosure provides a direct current power converter comprising a controller, a first power conversion module, and a second power conversion module. A first direct current terminal and a second direct current terminal of the first power conversion module are respectively coupled to a first direct current terminal and a second direct current terminal of the second power conversion module. A third direct current terminal of the first power conversion module is a third direct current terminal of the direct current power converter, a fourth direct current terminal of the first power conversion module is coupled to a third direct current terminal of the second power conversion module, and the first power conversion module includes at least one first full-bridge circuit. The controller is configured to control, based on a first total voltage, the first full-bridge circuit to work in a full-bridge mode or a half-bridge mode.

Abstract: A session release method performed by an Access and Mobility Management Function (AMF) device includes in response to receiving an Artificial Intelligence (AI) session release request message sent by a terminal, sending the AI session release request message to a Session Management Function (SMF) device; sending an N2 resource release request message to a Radio Access Network (RAN) based on an AI session release response message returned by the SMF device; performing an AI session release update with the SMF device based on an N2 resource release response message returned by the RAN; after receiving an AI session release status notification message sent by the SMF device, sending an AI session release result included in the AI session release status notification message to the terminal; and in response to receiving an acknowledgement message, determining that the release of the AI session is completed.

Abstract: Method, systems, and computer program products for access configuration in hybrid network environments are disclosed. According to the method, an access configuration request is received from a client device in a first network environment, wherein the access configuration request is associated with an access to a network resource in a second network environment and comprises first authentication information associated with the client device. Further, second authentication information associated with the network resource is obtained. The first and second authentication information is further used to determine whether the access configuration request is verified. If the access configuration request is verified, connectivity between the client device and the network resource can be automatically established.

Abstract: A method, system, and computer program product for improving debugging efficiency through fallibility skip functionality are provided. The method initiates a fallibility skip mode within a programming environment. The method identifies a code module to be translated from a first coding language to a second coding language. The code module including a function statement. A modified function statement is generated based on the function statement and the initiation of the fallibility skip mode. One or more exception handling functions are added based on the modified function statement and the fallibility skip mode. The method generates a modified code module in the second coding language based on the fallibility skip mode.

Abstract: An object pose estimation system, an execution method thereof and a graphic user interface are provided. The execution method of the object pose estimation system includes the following steps. A feature extraction strategy of a pose estimation unit is determined by a feature extraction strategy neural network model according to a scene point cloud. According to the feature extraction strategy, a model feature is extracted from a 3D model of an object and a scene feature is extracted from the scene point cloud by the pose estimation unit. The model feature is compared with the scene feature by the pose estimation unit to obtain an estimated pose of the object.

Abstract: Methods for updating an artificial intelligence (AI) session, communication apparatuses, and storage mediums are provided, which can be applied to the technical field of communications. The method executed by a terminal device comprises: sending an AI session update request to an access network (RAN) device; and then receiving a session management (SM) context modification result of an AI session returned by the RAN device.

Abstract: Provided herein are small molecules comprising a first domain that binds to ASH1L and a second domain that facilitates ASH1L degradation. In particular, ASH1L-targeting proteolysis targeting chimeras (PROTACs) and methods of use thereof for the treatment of disease (e.g., acute leukemia, solid cancers and other diseases dependent on activity of ASH1L) are provided.

Abstract: A method for correcting dimensional distortion when viewing a display at an angle is disclosed. In one embodiment, such a method identifies a line of sight of a user relative to a display. The method determines an angle of the line of sight relative to the display and a displacement of the user relative to the display. Using the angle and the displacement, the method determines an adjustment needed to reduce dimensional distortion of content on the display caused by the angle and the displacement. The method applies the adjustment to the content. In certain embodiments, applying the adjustment includes one or more of altering a size of the content on the display, altering proportions of the content on the display, and altering an orientation of the content on the display. A corresponding system and computer program product are also disclosed.

Abstract: The present application discloses a microbubble dispersion system stabilized with polydopamine nanoparticles for highly-efficient intravenous oxygen supply and a method for preparing the same. The method includes: dissolving dopamine, chitosan quaternary ammonium salt and amino-rich polymer in water, adjusting the pH to be alkaline, and then introducing oxygen into the solution; under the strong shear force of a homogenizer, oxygen oxidizing dopamine, and the obtained polydopamine nanoparticles adhering to the interface of oxygen microbubbles during polymerization, forming a compact shell layer of polydopamine particles; finally, adding glutaraldehyde to solidify the shell layer of polydopamine particles adhered to the interface of microbubbles, and obtaining oxygen microbubbles stably dispersed in water by filtration, washing and redispersion.