Abstract: A multi-lead electrocardiogram detection method and an electronic device. The method includes: obtaining potential signals of surfaces of two upper limbs and a lower limb of a human body and six equivalent positions on a chest of the human body in response to a user operation, and determining electrocardiogram signals corresponding to twelve leads based on the potential signals. The user operation is an operation that first and second detection electrodes are in contact with the two upper limbs of the human body, and the third detection electrode is in contact with the lower limb of the human body and the six equivalent positions on the chest in sequence.

Abstract: This application provides a control circuit, an electronic device, a hardware security protection method, and a storage medium. The control circuit includes: a MCU, a short circuit element, a switch element, and an input/output unit, where a VCC pin of the MCU is connected to a power supply voltage VCC, a GPIO pin of the MCU is connected to an input end of the short circuit element, a GND pin of the MCU is grounded through the switch element, and an output end of the short circuit element is connected to a signal receiving end of the input/output unit; the MCU is configured to output a first control signal through the GPIO pin after the GND pin is grounded through the switch element; and the short circuit element is configured to control, based on the first control signal, the input/output unit to be short-circuited to ground.

Abstract: This application provides a rotary mechanism, a support apparatus, and an electronic device, and relates to the field of electronic device technologies, allowing the electronic device to be lighter and thinner in an unfolded state. The rotary mechanism includes a base, a first connector, a second connector, a lifting plate, a first torsion spring, and a second torsion spring. The first connector and the second connector are rotatably connected to the base by a first rotary shaft and a second rotary shaft respectively. The first torsion spring includes a first spiral body and a first torsion arm. The first spiral body is sleeved on the first rotary shaft. One end of the first torsion arm is fixed to one end of the first spiral body. An other end of the first torsion arm is slidably connected to the lifting plate in a first direction. The second torsion spring includes a second spiral body and a second torsion arm. The second spiral body is sleeved on the second rotary shaft.

Abstract: This application provides a photographing method and an electronic device. The electronic device can display a photographing preview interface, where the photographing preview interface includes a first image collected by a first camera and a second image collected by a second camera. If the first camera detects a first gesture, the electronic device displays a first identifier; and if the first camera detects a second gesture within a preset time after the first identifier is displayed, the electronic device continues to display the first image in the photographing preview interface, and stops displaying the second image.

Abstract: This application provides a photographing mode switching method and a related apparatus. When detecting an operation of switching from a first photographing mode to a second photographing mode, an electronic device may obtain preview data in the first photographing mode from a memory by invoking a GPU, and downsample the preview data to a specified image size, to obtain a downsampled image of a specified data type; and perform blurring processing on the downsampled image of the specified data type returned by the GPU, to obtain a blurred image, and display the blurred image in a preview box in a coverage manner.

Abstract: A heart rate detection method and an electronic device are provided. The method includes: acquiring a first PPG signal with a first preset duration; determining a plurality of heart rate values based on the first PPG signal; determining a difference of every two adjacent heart rates based on the plurality of heart rate values, the difference of every two adjacent heart rates being used for generating a heart rate difference trajectory graph; acquiring a parameter of a heart rate difference trajectory based on the heart rate difference trajectory graph, the parameter of the heart rate difference trajectory including one or more of the following parameters: an angle, a quantity, an angle standard deviation, and a distance standard deviation; determining a heart rhythm type of the first PPG signal according to the parameter of the heart rate difference trajectory; and displaying the heart rhythm type of the first PPG signal.

Abstract: A terminal state identification method and apparatus are provided, and are applied to the field of terminal technologies. The method includes: determining a first probability value based on acceleration data; determining a second probability value based on the acceleration data; determining a state of a terminal user based on the first probability value and the second probability value, where the state of the terminal user includes a first state, a second state, and a third state, when determining that the terminal user is in the first state, where the first interface includes a first window, and the first window is used to display travel recommendation information for a current location to the user.

Abstract: Embodiments of this application disclose a terminal antenna and a method for controlling a beam direction of an antenna, and can expand a coverage range of a beam direction of a UWB antenna, thereby improving a positioning ability of the UWB antenna. The terminal antenna includes: a first radiator, a second radiator, and a switch module. The first radiator is connected to an end of the switch module, and the second radiator is connected to an other end of the switch module. The first radiator is provided with a feed point. A working status of the switch module includes an on state and an off state. In this application, by controlling the working status of the switch module, the coverage range of the beam direction of the UWB antenna is changed, thereby improving the positioning ability of the antenna.

Abstract: A communication method, a communication system, and an electronic device are provided. In a communication process, the electronic device may control time ratios of the electronic device for transmitting a signal, intercepting a signal, and sleeping based on a working mode selected by a user, and establish communication connection with another electronic device in a different working mode by planning a working cycle of the electronic device.

Abstract: An insulation adhesive, an insulation tape incorporating the insulation adhesive, and a method for preparing the insulation adhesive. The insulation adhesive includes: an insulation colloid, and an insulation particle doped in the insulation colloid. Breakdown field strength of the insulation particle is greater than breakdown field strength of the insulation colloid. Since the breakdown field strength of the insulation particle is greater than the breakdown field strength of the insulation colloid, the insulation colloid is easier to break down than the insulation particle. When an electro-static discharge current acts on the insulation adhesive, the electro-static discharge current breaks down the insulation colloid that has worse insulation performance and that is easier to break down, and bypasses the insulation particle that has better insulation performance and that is more difficult to break down, so that a breakdown path of the electro-static discharge current becomes longer.

Abstract: This application provides a screen recording method and an electronic device. The method includes: displaying a first interface of a first application, where the first interface includes a first area and a second area, the first area is a video playing area, and the second area is a non-video-playing area; in response to a first tap/click operation on a start recording button, recording, by using a video note application, display content corresponding to the first area; in response to a first tap/click operation on an end recording button, ending recording to obtain a first video; in response to a first user operation, displaying a second interface of the first application, where the second interface does not include a video playing area.

Abstract: A method includes determining a memory occupation amount; when the memory occupation amount is less than a first memory threshold, determining a level-x processing algorithm as a first photographing algorithm, and determining a level-x processing frame quantity as a first frame quantity; when the memory occupation amount is greater than or equal to the first memory threshold but less than a second memory threshold, determining the level-x processing algorithm as a second photographing algorithm, and determining the level-x processing frame quantity as a second frame quantity; or when the memory occupation amount is greater than the second memory threshold, determining the level-x processing algorithm as a third photographing algorithm, and determining the level-x processing frame quantity as a third frame quantity; processing the level-x processing frame quantity in a raw image by using the level-x processing algorithm to obtain a corresponding shot image; and saving the shot image.

Abstract: This application provides a method for capturing an image during video recording and an electronic device. The method includes: collecting a first image and displaying a first screen, where the first screen includes a snapshot shutter and a preview image obtained based on the first image; buffering, in a first buffer queue, the first image collected by a camera, where n frames of first images collected by the camera are buffered in the first buffer queue; selecting a second image from the n frames of first images based on additional information of the first images in response to a second operation on the snapshot shutter; and running a preset RAW domain image processing algorithm, by using m frames of first images in the n frames of first images as an input, to obtain a third image, where the m frames of first images include the second image.

Abstract: First audio data is output by using a first sound producing device, and second audio data is output by using a second sound producing device. First sound energy corresponding to the first audio data in a sound listening region and second sound energy corresponding to the first audio data in a sound leakage region are obtained, and third sound energy corresponding to the second audio data in the sound listening region and fourth sound energy corresponding to the second audio data in the sound leakage region are obtained. An audio optimization coefficient is determined The audio optimization coefficient is used to reduce sound energy corresponding to third audio data that corresponds to the first sound producing device in the sound leakage region and sound energy corresponding to fourth audio data that corresponds to the second sound producing device in the sound leakage region.

Abstract: A hinge mechanism and an electronic device, to ensure structural strength of a connecting portion between a swing arm and a hinge base while satisfying a demand for overall thinning of the device. The hinge mechanism includes a hinge base and a first swing arm. The hinge base includes a first mating portion, a second mating portion, and a third mating portion sequentially disposed along an extension direction of a hinge axis. The first swing arm includes a fourth mating portion, a fifth mating portion, and a sixth mating portion. The fourth mating portion, the fifth mating portion, and the sixth mating portion are slidable respectively along the first mating portion, the second mating portion, and the third mating portion, so that the first swing arm is rotatable relative to the hinge base around the hinge axis.

Abstract: This application provides a port frame, a middle frame component, and an electronic device. The port frame includes a frame body, a connection bump, and a positioning structure. A frame hole is formed on the frame body, the frame body has a frame surface, and the frame surface is configured to come into contact with a first middle frame surface. The frame body may be formed through injection molding of metal powder, to improve structural strength. The connection bump is connected to the frame body, the connection bump has a connection surface that forms an included angle with the frame surface, the connection surface is configured to come into contact with a second middle frame surface, and the connection bump is fixedly connected to the middle frame body, and is electrically connected to both the frame body and the middle frame body.

Abstract: A channel switching method, an electronic device and a storage medium are provided. The electronic device includes a first network channel and a second network channel, and a use priority of the second network channel is higher than a use priority of the first network channel. The method includes: starting a first application, where the first application includes a first data flow, and the first data flow is carried on the first network channel; and when it is detected that the second network channel is enabled and it is detected that the first data flow is a data flow of a preset type, keeping the first data flow still carried on the first network channel.

Abstract: Embodiments of this application provide a message processing method and apparatus, and an electronic device. The method is applied to a terminal device, and the method includes: receiving a first message; and pulling up a first application when the first message is a reassembly message, so that the first application performs message reassembly on the first message, including: reading, by the first application, message reassembly configuration information, and performing a message reassembly operation on the first message based on the message reassembly configuration information, to generate a second message. According to the method in the embodiments of this application, after a pushed message is received, the first application is pulled up to reassemble the message, so as to improve user experience of message display.

Abstract: This application provides a switch power supply circuit and a terminal device, and the switch power supply circuit uses a second switch transistor to replace a diode in an asynchronous switch power supply circuit. A turn-on impedance of the switch transistor is very small, only tens of milliohms, so that a turn-on voltage drop in the switch power supply circuit is reduced from hundreds of millivolts to tens of millivolts, power loss of the switch power supply circuit is greatly reduced, and output efficiency is improved. Moreover, this solution uses a discrete component to form a control circuit to control a switch status of the second switch transistor without additionally setting a pulse width modulation (PWM) controller, and costs of the discrete component are far lower than costs of the PWM controller, reducing hardware costs of a switch power supply and simplifying a circuit design.

Abstract: This application provides a folding assembly, a folding apparatus, and a terminal device. The folding assembly includes a base, a support member, and at least two swing arms. Each swing arm is provided with a first push part and a second push part. The first push part and the second push part are arranged in sequence in a direction of a rotation axis of the swing arm. During rotation of the swing arm from the unfolded position to the folded position, the first push part is driven to rotate to push the support member to move toward the base. During rotation of the swing arm from the folded position to the unfolded position, the second push part is driven to rotate to push the support member to move away from the base.