Abstract: A data annotation method includes receiving first to-be-annotated data sent by a user, where the first to-be-annotated data is at least one of an image, a point cloud, and a depth map; obtaining, from a multimodal foundation model library, a target vertical-domain multimodal foundation model corresponding to a service scenario to which the first to-be-annotated data belongs; receiving a first downstream task selection message sent by the user, where the first downstream task selection message indicates a first annotation type performed on the to-be-annotated data; obtaining, from a downstream task model library, a target downstream task model that corresponds to the service scenario to which the first to-be-annotated data belongs and that is used for performing the first annotation type; and annotating the first to-be-annotated data based on the target vertical-domain multimodal foundation model and the target downstream task model.

Abstract: The present invention provides a compound having a new structure as a PDE4B inhibitor, a preparation method for the compound, and a use of the compound in treating PDE4B-mediated diseases. Experiments confirm that the compound has a strong inhibitory effect on PDE4B enzyme and can be used as a promising compound for treating PDE4B-mediated diseases.

Abstract: The invention relates to a high density brain electrode assembly, including an elongated main shaft comprising a plurality of guiding lumens, extending to a distal end of the main shaft, a plurality of elongated electrode shanks, each electrode shank comprising a plurality of electrical contacts, extending through one of the plurality of guiding lumens, and being movable from a retracted position in which the electrode shank is retracted within the main shaft to an extended position in which the electrode shank extends distally from the distal end of the main shaft, a plurality of shuttle elements, each shuttle element extending through one of the plurality of guiding lumens, and being movable between a retracted position in which the shuttle element is retracted within the distal end of the main shaft and an extended position in which the shuttle element extends distally from the distal end of the main shaft.

Abstract: A radio frequency link switching method includes receiving, by a terminal device, first information from a network device. The first information indicates the terminal device to switch at least one transmit link from a first carrier group to a second carrier group. The method also includes determining, by the terminal device, a third carrier group based on a first parameter of the first carrier group and a first parameter of the second carrier group. The third carrier group is the first or second carrier group. A switching time period of the at least one transmit link is in the third carrier group. The first parameter includes one or more of a carrier bandwidth of at least one carrier, a bandwidth part in at least one carrier, identification information of at least one carrier, identification information of a cell to which at least one carrier belongs, or a quantity of carriers.

Abstract: Internet of Things (IoT) device classification is disclosed. Byte frequency information is obtained from an application executing on an Internet of Things (IoT) device that has a corresponding flow. The obtained byte frequency information is transmitted to a remote system. A classification of the application is received from the remote system. A policy is applied to the IoT device based at least in part on the received classification.

Abstract: A secondary cell adding method, a terminal, and a chip are disclosed, which relate to the field of communication technologies. The method is performed by a terminal and includes: camping on a first primary cell supporting NSA; receiving, a secondary cell measurement message from a network device, where the secondary cell measurement message includes a frequency of a first secondary cell and a first signal energy threshold, and a frequency of a second secondary cell and a second signal energy threshold; performing secondary cell measurement based on the frequency of the first secondary cell, where a priority of the frequency of the first secondary cell is higher than a priority of the frequency of the second secondary cell; and performing an operation of adding the first secondary cell if signal energy detected at the frequency of the first secondary cell is greater than the first signal energy threshold.

Abstract: The present disclosure provides a metasurface device and a method for manufacturing a metasurface device, an antenna and a communication device. The metasurface device includes: a substrate; and a metal layer on the substrate and having a plurality of openings therein; and a plurality of phase control structures on a side of the metal layer away from the substrate, and in one-to-one correspondence with the plurality of openings; and each phase control structure includes a baffle and at least one micro-mechanical driver, the baffle is connected to the at least one micro-mechanical driver, which is configured to actuate the baffle to shield a corresponding opening in response to a received signal.

Abstract: The amino acid sequence of a w-transaminase mutant derived from mutation of ?-transaminase from Aspergillus terreus, is as shown in SEQ ID NO. 4 or SEQ ID NO. 6. Compared with the wild-type enzyme, the half-lives of the ?-transaminase mutants are all above 24 h, while the half-life of the wild-type is only 6.90 min. The half-inactivation temperature of the mutants are 49.00° C. and 49.03° C., respectively, which are about 11° C. higher than that of the wild-type (37.89° C.), such that the thermal stability is significantly improved.

Abstract: A volute, a fan, an air conditioner, and a blade structure. The volute (123-10) includes: an enclosing plate (1-100), which encloses an air duct (1-101); an end plate (1-200) connected to an end of the enclosing plate (1-100), the end plate (1-200) being formed with an air intake (1-201) and a convex surface (1-202) which is arranged around the air inlet (1-201); an convex surface (1-202) located at a side of the end plate (1-200) away from the air duct (1101), the convex surface (1-202) extending from the enclosing plate (1-100) toward the air inlet (1-201).

Abstract: An oxycycloalkyl-substituted camptothecin derivative used as an antibody-drug conjugate represented by formula (I) in the drug toxicity portion. The antibody-drug conjugate has a significant antitumor effect.

Abstract: An ocean current detection device and method based on double-helix and double-core vibration fiber-optic cable, comprises a double-core fiber-optic cable and a ?-OTDR system; the double-core fiber-optic cable comprises a first and a second optical fiber core, provided symmetrically in the double helix structure. The terminate ends of the first and the second optical fiber core are connected, and the start end of the first or the second optical fiber core is connected with the ?-OTDR system. When measuring the ocean current characteristics in the target sea area, the double-core fiber-optic cable is provided underwater to generate vortex-induced vibration. The ?-OTDR system is provided for emitting laser towards the cable, receiving returned double-core vibration signals, extracting vibration characteristics from the double-core vibration signals to determine ocean current characteristics, including ocean current flow velocity and direction, to improve the detection accuracy.

Abstract: The present invention provides a polyamide composite, including the following components: 20 to 80 parts of a polyamide resin; 1 to 30 parts of a red phosphorus flame retardant; 0.01 to 10 parts of trimethallyl isocyanurate; and the polyamide composite has a cross-linked structure between polyamide molecules. By adding trimethallyl isocyanurate (TMAIC) for irradiation cross-linking treatment, and by the red phosphorus flame retardant, not only the polyamide composite can meet the needs of flame retardant, but also glow-wire ignition temperature (GWIT) and comparative tracking index (CTI) have been improved.

Abstract: A disclosed memory device includes transistors. Each transistor includes a semiconductor body extending along a first direction; and a gate structure coupled with the semiconductor body. The gate structure extends along the first direction and includes a first conductive layer extending along the first direction and a second conductive layer in contact with the first conductive layer at the first direction. A first end of the first conductive layer is in contact with a second end of the second conductive layer, and a second end of the first conductive layer is away from the second end of the second conductive layer. A material of the second conductive layer is different from a material of the first conductive layer.

Abstract: An integrated power converter. The integrated power converter may include a first circuit configured to interface a first DC electrical power of power factor correction circuit with a first primary side of a first transformer, a second circuit arranged in an integrated formation and configured to interface a second DC electrical power at a first secondary side of the first transformer with a first battery and with a second primary side of a second transformer, and a third circuit configured to interface a third DC electrical power at a second secondary side of the of the second transformer with a second battery.