Abstract: This application discloses a repositioning method performed by an electronic device in a camera pose tracking process, belonging to the field of augmented reality (AR). The method includes: obtaining a current image acquired by the camera after an ith anchor image in a plurality of anchor images; obtaining an initial feature point and an initial pose parameter in a first anchor image in the plurality of anchor images in a case that the current image satisfies a repositioning condition; performing feature point tracking on the current image relative to the first anchor image, to obtain a target feature point; calculating a pose change amount of a camera from a first camera pose to a target camera pose according to the initial feature point and the target feature point; and performing repositioning according to the initial pose parameter and the pose change amount to obtain a target pose parameter.

Abstract: A device as a light-emitting for a projector. The projector includes a light-emitting module and a first lens array positioned at one side. The first lens array includes a number of first lenses arranged in parallel along a first direction. The first lens array is configured to receive source light. A second lens array is positioned at a side of the first lens array. The second lens array includes a number of second lenses arranged in parallel along a second direction. The second lens array receives first collimated light from the first lenses and emits second collimated light which is of even light-spot density and uniform brightness.

Abstract: A method for topic early warning includes: acquiring a self-defined keyword; calculating similarity between the self-defined keyword and each word in a corpus, and acquiring extended keywords related to the self-defined keyword from the corpus according to the similarity; selecting a target keyword from the extended keywords according to a type of the extended keywords and similarity between the extended keywords and the self-defined keyword, and adding the target keyword to a target keyword list; performing real-time monitoring according to the target keyword in the target keyword list; and performing topic early warning when it is monitored that the number of topics corresponding to the target keyword reaches a preset threshold.

Abstract: A method for transmitting data includes: a terminal device obtains transmission control information of each network device among at least one network device, the transmission control information of each network device being used to indicate the state of a data duplication and transmission function configured by the corresponding network device for a first data radio bearer (DRB), the state being an active state or an inactive state; the terminal device updates a control variable according to the transmission control information of each network device, the control variable being used to maintain the states of the data duplication and transmission function configured by a plurality of network devices for the first DRB, the plurality of network devices including the at least one network device; and the terminal device controls the data duplication and transmission function of the first DRB according to the updated control variable.

Abstract: The present invention discloses a new two-stator and two-rotor combined energy-saving motor, which relates to the technical field of motor. The motor comprises a motor shell, two rotors and two stators, wherein the stators and the rotors are arranged in the motor shell, each rotor comprises an outer rotor part, an inner rotor part and a flange, the outer rotor part is arranged outside the cylindrical inner rotor part, the outer rotor part and the inner rotor part are connected by flange; an inner stator zone is formed between the outer rotor part and the inner rotor part, and one of the stators is arranged in the inner stator zone of the rotor; an outer stator zone is formed between the outer rotor part and the motor shell, and the other of the stator is arranged in the outer stator zone.

Abstract: A display method for use in multi-operating systems includes: in a host operating system, allocating a native window to each guest operating system; in the guest operating system, requesting a physical continuous memory (PCM) sub-region corresponding to a window from the host operating system when the window is newly created; in the host operating system, allocating the PCM sub-region to the guest operating system; in the guest operating system, storing rendered data to the PCM sub-region when the newly created window is rendered; and in the host operating system, rendering the native window corresponding to the guest operating system based on the data in the PCM sub-region when a display request from the guest operating system is monitored, and in the host operating system, displaying the native window.

Abstract: Disclosed in the present disclosure are an exposure control method, an exposure control device and an electronic device. The exposure control method includes the following. Scene data is processed to obtain a foreground part of a cached main image. A reference exposure is determined according to brightness information of the foreground part. A first exposure for a first image and a second exposure for a second image are determined according to the reference exposure. An imaging device is controlled to expose according to the reference exposure, the first exposure and the second exposure.

Abstract: A three-degree-of-freedom parallel mechanism, includes a fixed platform, a movable platform, and three kinematic chains, where at least one of the three kinematic chains is a flexible chain; and the flexible chain includes a first connecting rod, a second connecting rod, and an axis-variable revolute pair, the axis-variable revolute pair includes a fixed member, a movable member, and a spherical pair, one end of the fixed member is fastened on the fixed platform, the other end of the fixed member fits and abuts against an inclined surface of the movable member, the spherical pair is accommodated in the fixed member, a spherical hinge connecting rod of the spherical pair penetrates the movable member, the first connecting rod is rotatably connected to the spherical hinge connecting rod and the second connecting rod, and the second connecting rod is spherically hinged to the movable platform.

Abstract: Embodiments of this application disclose a sticker presentation method performed at a first terminal. The first terminal moves, after obtaining a drag instruction for a selected target sticker in a sticker selection window, the target sticker according to an obtained drag track, and displays a drop prompt message when moving the target sticker. After obtaining a drag stop instruction for the target sticker in a message presentation interface, the first terminal presents the target sticker at a first target location at which drag stops after receiving a drop confirmation instruction triggered by the drop prompt message. In the embodiments of this application, when a sticker is presented, the sticker is randomly dropped on a message presentation interface. Such a sticker presentation manner is more vivid, interaction manners are more diversified, and a display effect is good.

Abstract: An advanced nitrogen removal method using partial nitrification-denitrification coupled two-stage autotrophic denitrification. Sewage is introduced into a first pool for partial nitrification-denitrification treatment, and then introduced into a first regulating reservoir. Dissolved oxygen content in the first pool is kept at 0.4-0.6 mg/L. Water is discharged when a molar ratio of nitrite nitrogen to ammonia nitrogen in the first regulating reservoir is 1.0-1.3:1. Effluent in the regulating reservoir is introduced into a second pool for anaerobic ammonia oxidation treatment, and then introduced into a second regulating reservoir. In the second pool, pH is 7.0-7.4, a temperature is 22-28° C. Effluent in the second regulating reservoir and sulfides are introduced into a third pool for denitrification treatment. Water is discharged. In the third pool, pH is 7.5-8.0, a temperature is 28-32° C., a mass ratio of sulfur to nitrogen is 1.9-2.0:1.

Abstract: The present disclosure provides a depth image processing method and apparatus, and an electronic device. The method includes: acquiring a first image acquired by a depth sensor and a second image acquired by an image sensor; determining a scene type according to the first image and the second image; and performing a filtering process on the first image according to the scene type.

Abstract: A method for controlling an optical substance detection device, wherein the optical substance detection device includes a light sensing device, includes: when it is detected that the optical substance detection device is subjected to an impact, acquiring an impact force and an impact direction when the optical substance detection device is subjected to the impact; calculating a light sensing displacement deviation value according to a predetermined data model and in combination with the impact force and the impact direction; and performing light sensing correction according to the light sensing displacement deviation value.

Abstract: Disclosed herein is a system suitable for X-ray detection. The system comprises a detector and cooling system configured to control temperature of the detector and prevent condensation of water vapor on the detector. The detector comprises an X-ray absorption layer and electronics layer. The X-ray absorption layer comprises a plurality of pixels, each pixel configured to count numbers of X-ray photons incident thereon whose energy falls in a plurality of bins, within a period of time. The electronics layer comprises an electronic system configured to add the numbers of X-ray photons for the bins of the same energy range counted by all the pixels. The cooling system comprises a chiller configured to lower temperature and moisture level of air, and a fan configured to blow the air that is cooled and dried to the detector.

Abstract: A liquid phase analysis device includes a first fluid supply system for driving a first fluid or a sample to be detected, a second fluid supply system for driving a second fluid, an injection valve connected to the second fluid supply system and the first fluid supply system, a chromatographic column connected to the injection valve, and a detector connected to the chromatographic column, wherein the chromatographic column is used for isolating components in the sample to be detected; the detector is used for detecting the components, isolated by the chromatographic column, in the sample to be detected; the injection valve is used for switching a flow path so as to communicate flow paths of the first fluid supply system and second fluid supply system with a flow path of the chromatographic column. The liquid phase analysis device simplifies the complexity of a system, thereby reducing the costs of implementation.