Abstract: The present application provides a method for determining the validity of an electromyographic (EMG) signal, an apparatus, a device and a storage medium. The method includes: collecting video data including squatting and foot-padding by dynamic muscle stimulation of a leg, and collecting an EMG signal on a surface of the leg while squatting and foot-padding; performing human body recognition on each frame of images of the video data, and acquiring normalized coordinates of human body key points in each frame of images; converting the normalized coordinates of the human body key points in each frame of images into pixel coordinates to obtain the pixel coordinates of the human body key points in each frame of images; and correcting the pixel coordinates of the human body key points in each frame of images according to shooting angles.

Abstract: A carbon fiber watch case includes a main body structure and a conductive structure. The main body structure has an inner surface and an outer surface. The conductive structure has a first contact on the inner surface and a second contact on the outer surface to electrically connect the inner surface and the outer surface of the carbon fiber watch case. The main body structure includes a braided body and a polymer body. The braided body includes a carbon fiber, and the braided body has a network-like structure. The polymer body at least fills a gap of the network-like structure of the braided body so that the braided body and the conductive structure form an integrated structure.

Abstract: A circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad.

Abstract: A polyurethane composition with stable matt surface and good chalking resistance, which is suitable for use as a sealant and/or an adhesive for sealing and/or bonding, preferably for gap-filling, particularly in construction and manufacturing industries. The polyurethane composition includes:—a polyurethane prepolymer containing an isocyanate group, including a MDI-based prepolymer synthesized from a polyether diol and a polyether triol with MDI, and a TDI-based prepolymer synthesized from a polyether diol and a polyether triol with TDI; and —a phenyl alkyl sulfonate in an amount of 12-25 wt %, preferably 18-25 wt %, based on the total weight of the composition.

Abstract: This application relates to a spring bar assembly, a watch strap, and a watch. The spring bar assembly includes a mounting base, a spring bar, a button, and a lever. Both the spring bar and the button are mounted on the mounting base. The button is capable of moving relative to the mounting base, and a movement direction of the button is perpendicular to an axial direction of the spring bar. One end of the lever extends into a guide groove of the button and abuts against first side walls of the guide groove, and the other end of the lever is connected to the spring bar. The button is capable of driving the spring bar to move relative to the mounting base in the axial direction of the spring bar by using the lever.

Abstract: This application discloses a thermal pad, a heat dissipation module, and an electronic device, and relates to the field of thermal pad technologies. The thermal pad includes a pad body. The pad body is provided with a hollowed-out part, and the hollowed-out part is filled with a liquid metal material layer. This application may be applied to electronic devices such as notebook computers.

Abstract: In some embodiments, a braided watch band includes a braided band. The braided band includes a first braided band branch and a second braided band branch arranged in a thickness direction. The braided band further includes a first binding yarn and a second binding yarn. The first braided band branch and the second braided band branch to form a separate section and joint sections. In the joint sections, the first binding yarn and the second binding yarn form an orthogonally locking structure. In the separate section, the first binding yarn passes through one of the first braided band branch or the second braided band branch, and the second binding yarn passes through the other of the first braided band branch or the second braided band branch. Portions of the first braided band branch and the second braided band branch at the separate section form a loop.

Abstract: A fastening assembly comprises: a pressing plate, a base and a rotating shaft; wherein the pressing plate is rotatively connected to the base by the rotating shaft, the pressing plate and the base are enclosed to form a passage to accommodate the first connecting strap; and a press-fit protrusion is provided on the pressing plate to press the first connecting strap in the passage; a first snap-fit part is provided on the pressing plate, and a second snap-fit part is provided on the base, fit into each other to form the snap-fit connection.

Abstract: Embodiments of this application disclose a data storage system, an intelligent network interface card, and a compute node, and belong to the field of data storage. The data storage system includes a compute node and a plurality of storage nodes. The compute node stores metadata, and the metadata may indicate an address at which target data is stored in the plurality of storage nodes. In this way, the compute node may directly read the target data from a corresponding storage node based on the address indicated by the metadata stored in the compute node, does not need to perform cross-node data forwarding by using the plurality of storage nodes, and does not need to perform a plurality of times of metadata searching. This effectively reduces a data reading delay and improves a data reading speed.

Abstract: Disclosed are a method for manufacturing a heat dissipation structure of an electronic element, a heat dissipation structure, and an electronic device. The method includes: covering a periphery of an electronic element with a heat dissipation cover, where the heat dissipation cover is provided with a through hole, and an inner wall of the heat dissipation cover is provided with a plurality of electrodes; injecting a liquid metal through the through hole into an accommodating cavity enclosed by the substrate and the heat dissipation cover until the entire accommodating cavity is filled, and during this period, energizing the electrodes, so that a current flows through the liquid metal to reduce surface tension of the liquid metal; and sealing the through hole.

Abstract: This application discloses a circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad, so as to electrically connect the radio frequency front-end circuit to the radio frequency back-end circuit.

Abstract: Use of an active ingredient in repairing heart tissue injury. Specifically, disclosed is an active ingredient capable of being used for repairing heart tissue injury and treating diseases related to lymphatic abnormalities, comprising: a TBX1 protein, a coding gene thereof, or an accelerator thereof, or a combination thereof. The TBX1 protein can promote the proliferation of heart lymphatic endothelium cells, play an immunoregulatory role, promote the establishment of an immunosuppressive microenvironment in the myocardium after heart tissue injury, inhibit autoimmune responses after the heart tissue injury, relieve concurrent inflammation of the heart tissue, and promote the repair and regeneration of the injured heart tissue.

Abstract: This application discloses a circuit board and a manufacturing method thereof, and a terminal device, and relates to the technical field of terminals, to resolve the problem of low reliability of connection between a radio frequency front-end circuit and a radio frequency back-end circuit in a circuit board of a terminal device in a related technology. The circuit board includes a substrate and a liquid metal body, where the substrate is provided with a radio frequency front-end circuit, a radio frequency back-end circuit, and a pad group, where the pad group includes a first pad electrically connected to the radio frequency front-end circuit and a second pad electrically connected to the radio frequency back-end circuit, and the second pad is spaced apart from the first pad; and the liquid metal body is arranged at a position of the pad group and connects the first pad to the second pad, so as to electrically connect the radio frequency front-end circuit to the radio frequency back-end circuit.

Abstract: Disclosed are a GaN power device and a manufacturing method thereof. The GaN power device includes a substrate, and a buffer layer, a GaN channel layer and a barrier layer sequentially stacked on the substrate from bottom to top. The barrier layer is provided with a p-GaN cap layer and a p-GaN thin layer, and the p-GaN thin layer is configured to cover the surface of the barrier layer and is connected to the p-GaN cap layer; the upper surface of the barrier layer is also provided with an input electrode and an output electrode, and a control electrode is provided on the upper surface of the p-GaN cap layer. The control electrode and the p-GaN thin layer are located between the input electrode and the output electrode.

Abstract: An item information providing method according to example embodiments may include checking a plurality of products corresponding to a search term received from a user who uses the service, and providing a first page that includes a first region in which a list of the plurality of products is displayed and a second region in which a filtering interface configured to filter the list of the plurality of products displayed in the first region according to a user's input is displayed.

Abstract: A controller for vehicle air conditioner includes a base defining a mounting cavity; a knob assembly rotatably mounted to the base, wherein at least a portion of the knob assembly is located in the mounting cavity; and at least one bearing element arranged between the base and the knob assembly. Such a design reduces the friction between the base and the knob assembly and thus reduces the noise.

Abstract: This application provides a method for manufacturing a heat dissipation structure of an electronic element, a heat dissipation structure, and an electronic device. The method includes: placing a substrate having an electronic element in an environment that meets a preset temperature condition; and in the environment that meets the preset temperature condition, covering a periphery of the electronic element with a heat dissipation cover, fixedly connecting the heat dissipation cover to the substrate, and placing a solid-state phase-change thermally conductive material in an accommodation cavity surrounded by the substrate and the heat dissipation cover.

Abstract: A system for controlling the amount of a liquid carbon source released to a constructed wetland, includes: a carbon source pool, a carbon source pipe, a peristaltic pump, a programmable logic controller (PLC), a computer, a first flow meter, a first chemical oxygen demand (COD) sensor, a first total nitrogen (TN) sensor, a second TN sensor, a second COD sensor, an inlet pipe, and an outlet pipe. The first flow meter, the first COD sensor, and the TN sensor are disposed on the inlet pipe; the second COD sensor and the second TN sensor are disposed on the outlet pipe; the inlet pipe and the outlet pipe are connected to the constructed wetland; the carbon source pipe is connected to the carbon source pool via the peristaltic pump; the computer, the peristaltic pump, the first flow meter, and all sensors are connected to the PLC controller.

Abstract: A system and method for determining reservoir fluid contamination of a reservoir is disclosed. The system includes one or more sensors to detect field measures from reservoir fluid of the reservoir and includes memory and at least one processor to execute instructions from the memory to cause the system to perform further steps. A step by the at least one processor is to simulate relationship data having purity levels correlated to volumes or times associated with extraction of an applied or simulated fluid for varying modeled rock formations. A further step is to fit one or more of the relationship data to the field measures to generate errors. Yet another step is to determine the reservoir fluid contamination from one of the purity levels that is associated with the relationship data that is within a threshold error value or error range of the errors.

Abstract: An electric ball valve, comprising: a shaft portion, a magnetic ring, and a Hall sensor, the Hall sensor being in electrical and signal connection with a circuit board, the shaft portion being connected to an output shaft and capable of rotating along with the output shaft, the magnetic ring being sleeved on the radial periphery of the shaft portion, and the magnetic ring being capable of rotating along with the shaft portion; and a cushioning portion, the cushioning portion directly or indirectly abutting against an end of the shaft portion. Also provided is a method for manufacturing an electric valve. The present electric ball valve is provided with the cushioning portion at the end of the shaft portion, thereby facilitating reducing downward plays of the magnetic ring and the shaft portion in the axial direction during rotation along with the output shaft.