Abstract: An imaging system including an image acquisition device, a light-field imaging arrangement including an optical meta-device operable to facilitate imaging of a light-field of a target scene, and a structured-light imaging arrangement including an optical meta-device operable to facilitate generation of structured-light to be provided to a target scene to facilitate imaging of the target scene. The light-field imaging arrangement and the structured-light imaging arrangement are operably coupled with the image acquisition device such that the imaging system is selectively operable in, at least, a light-field imaging mode for performing light-field imaging of the target scene and a structured-light imaging mode for performing structured-light imaging of the target scene. The optical meta-device of the light-field imaging arrangement and the optical meta-device of the structured-light imaging arrangement may be provided by the same optical meta-device.

Abstract: A lipid delivery system, a virus-like structure (VLS) vaccine constructed therefrom, and a lipid particle capable of encapsulating an mRNA molecule encoding a SARS-CoV-2-specific antigen are provided. After the lipid particle encapsulates an mRNA molecule encoding a SARS-CoV-2 antigen, a SARS-CoV-2 S1 antigen protein can be embedded on a surface of an envelope structure of the lipid under specific buffer conditions to produce a VLS vaccine with an antigen-encoding mRNA molecule encapsulated inside and an outer membrane presenting a required viral antigen protein. The vaccine has a superior specific antibody-inducing ability to a SARS-CoV-2 mRNA vaccine and a polypeptide vaccine, can maintain a long-lasting high antibody level, and can also exhibit excellent immune binding abilities for the emerging different variants.

Abstract: A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.

Abstract: A system and method for treating reverse-osmosis (RO) concentrated water with high temporary hardness. The system includes a crystallization unit, a precipitation unit, a dewatering unit, and a programmable logic controller (PLC) system. The crystallization unit, precipitation unit and dewatering unit are connected in series, and the PLC system is configured to control pumps, valves, and displays in the crystallization unit, precipitation unit and dewatering unit. The crystallization unit includes a storage tank and a crystallization reactor communicated therewith. The crystallization reactor is provided with a pH meter, a liquid-level gauge, and a stirrer. A connection pipe between the crystallization reactor and the RO concentrated water is provided with an inlet pump and a inlet valve. A connection pipe between the crystallization reactor and the storage tank is provided with a feeding pump and a feeding valve.

Abstract: A system for treating printed circuit board wastewater (PCB) includes a production system, a pretreatment system, a biochemical system, a recovery system and a concentrated water treatment system. The production system is configured for producing process water and auxiliary water from tap water. The pretreatment system is configured to pretreat different wastewater samples separately. The biochemical system is configured to decompose the pretreated wastewater. The recovery system is configured to treat wastewater from the pretreatment system and the biochemical system to obtain process water and feed concentrated water to the concentrated water treatment system. The concentrated water treatment system is configured to treat the concentrated water to meet a discharge standard. A treatment method for the PCB wastewater is also provided.

Abstract: A system for treating printed circuit board wastewater (PCB) includes a production system, a pretreatment system, a biochemical system, a recovery system and a concentrated water treatment system. The production system is configured for producing process water and auxiliary water from tap water. The pretreatment system is configured to pretreat different wastewater samples separately. The biochemical system is configured to decompose the pretreated wastewater. The recovery system is configured to treat wastewater from the pretreatment system and the biochemical system to obtain process water and feed concentrated water to the concentrated water treatment system. The concentrated water treatment system is configured to treat the concentrated water to meet a discharge standard. A treatment method for the PCB wastewater is also provided.

Abstract: A system and method for treating reverse-osmosis (RO) concentrated water with high temporary hardness. The system includes a crystallization unit, a precipitation unit, a dewatering unit, and a programmable logic controller (PLC) system. The crystallization unit, precipitation unit and dewatering unit are connected in series, and the PLC system is configured to control pumps, valves, and displays in the crystallization unit, precipitation unit and dewatering unit. The crystallization unit includes a storage tank and a crystallization reactor communicated therewith. The crystallization reactor is provided with a pH meter, a liquid-level gauge, and a stirrer. A connection pipe between the crystallization reactor and the RO concentrated water is provided with an inlet pump and a inlet valve. A connection pipe between the crystallization reactor and the storage tank is provided with a feeding pump and a feeding valve.

Abstract: A total nitrogen (TN) removal device for sewage and its operation method. The TN removal device includes a denitrification tank, a supplementary reaction zone filled with aerobic granular sludge and a sedimentation and separation zone. The supplementary reaction zone and the sedimentation and separation zone are arranged inside the denitrification tank, and communicated through a three-phase separator. The sedimentation and separation zone is located above the supplementary reaction zone. A top of the sedimentation and separation zone is greater than its bottom. A membrane aerated biofilm reactor (MABR) assembly is arranged in a space formed by outer walls of the sedimentation and separation zone and supplementary reaction zone and an inner chamber of the denitrification tank. A side wall of the denitrification tank is provided with a chemical oxygen demand (COD) detector and a nitrate nitrogen detector.

Abstract: A pose determining method, which may be applied to the field of photographing and image processing, includes: obtaining a target image, where the target image includes a target parking space mark and a target parking space line, and a target parking space corresponding to the target parking space mark includes the target parking space line; and determining pose information based on the target parking space mark and the target parking space line. The pose information indicates a corresponding pose of a terminal during photographing of the target image. According to the pose determining method, the pose information may be determined based on the target parking space mark and the target parking space line, to implement positioning.

Abstract: The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.

Abstract: A dosing control method for micro-flocculation in ultrafiltration, including: calculating a preset value of a first differential pressure before an initial backwash and a preset value of a second differential pressure before a final backwash in each chemically enhanced backwash cycle; calculating a preset value of a third differential pressure between the first differential pressure and the second differential pressure according to the preset value of the first differential pressure and the preset value of the second differential pressure; obtaining a predicted value of the third differential pressure according to a differential pressure curve plotted based on online filtration differential pressure data; and comparing the preset value of the third differential pressure and the predicted value of the third differential pressure to determine whether to dose. A dosing control system is also provided.

Abstract: A dosing control method for micro-flocculation in ultrafiltration, including: calculating a preset value of a first differential pressure before an initial backwash and a preset value of a second differential pressure before a final backwash in each chemically enhanced backwash cycle; calculating a preset value of a third differential pressure between the first differential pressure and the second differential pressure according to the preset value of the first differential pressure and the preset value of the second differential pressure; obtaining a predicted value of the third differential pressure according to a differential pressure curve plotted based on online filtration differential pressure data; and comparing the preset value of the third differential pressure and the predicted value of the third differential pressure to determine whether to dose. A dosing control system is also provided.

Abstract: A local image enhancing method includes: obtaining a region or object selected by a user; generating selection parameters according to the selected region or object; enhancing the selected region or object according to the selection parameters, and generating an image of the enhanced selected region or object; or, sending the selection parameters to a peer end; the peer end enhancing the selected region or object according to the selection parameters; returning the image of the enhanced selected region or object. The embodiments of the present document further provide a local image enhancing apparatus. The embodiments of the present document may enhance the corresponding region according to the user selection.

Abstract: A display device includes a display device body. The display device body includes a first lens barrel and a second lens barrel. A first lens is disposed at a first end of the first lens barrel, and a second lens is disposed at a first end of the second lens barrel. A first distance sensor and a second distance sensor are further disposed on the display device body. The second distance sensor is configured to measure a distance between a right eyeball and the second lens. Two distance sensors are disposed on the display device body.

Abstract: The invention relates to sewage treatment, and more particularly to a system for treating reverse-osmosis concentrated water with permanent hardness. The system includes a first crystallization unit, a first reverse osmosis unit, a second crystallization unit, a lime softening unit and a second reverse osmosis unit, which are connected in sequence. The system of the invention is able to eliminate the permanent hardness and the temporary hardness of the concentrated brine, and the hardness can be reduced to equal to or less than 50 mg/L.

Abstract: A display device includes a display device body. The display device body includes a first lens barrel and a second lens barrel. A first lens is disposed at a first end of the first lens barrel, and a second lens is disposed at a first end of the second lens barrel. A first distance sensor and a second distance sensor are further disposed on the display device body. The second distance sensor is configured to measure a distance between a right eyeball and the second lens. Two distance sensors are disposed on the display device body.

Abstract: A method and apparatus for detecting a hotspot scene of a video conference are provided. The method includes: a plurality of video receivers recognize in real time and perform statistics on specific behavior, including at least one of a discussion behavior, screen watching behavior and handclap behavior, of various viewers at a video conference site according to video data at video conference site; the video receivers judge, according to statistics, whether a frequency at which or a time length for which various viewers at video conference site perform the specific behavior, exceeds a first preset value; the video receivers send the video sender time period of the video played at video conference site, for which a result of the judgment is that the first preset value is exceeded; and the video sender determines a hotspot scene of the played video according to the time periods sent by the video receivers.

Abstract: A self-adaptive display method for an image of a mobile terminal is described. The method includes: determining, by a multipoint control terminal, the number K of sub-pictures which are permitted to be displayed by a mobile terminal in a current placement state; and selecting and sending K sub-pictures to the mobile terminal for display. A self-adaptive display device for an image of a mobile terminal, and a computer storage medium are also described.

Abstract: A method and apparatus for detecting a hotspot scene of a video conference are provided. The method includes a plurality of video receivers recognize in real time and perform statistics on specific behavior, including at least one of a discussion behavior, screen watching behavior and handclap behavior, of various viewers at a video conference site according to video data at video conference site; the video receivers judge, according to statistics, whether a frequency at which or a time length for which various viewers at video conference site perform the specific behavior, exceeds a first preset value; the video receivers send the video sender time period of the video played at video conference site, for which a result of the judgment is that the first preset value is exceeded; and the video sender determines a hotspot scene of the played video according to the time periods sent by the video receivers.

Abstract: A local image enhancing method includes: obtaining a region or object selected by a user; generating selection parameters according to the selected region or object; enhancing the selected region or object according to the selection parameters, and generating an image of the enhanced selected region or object; or, sending the selection parameters to a peer end; the peer end enhancing the selected region or object according to the selection parameters; returning the image of the enhanced selected region or object. The embodiments of the present document further provide a local image enhancing apparatus. The embodiments of the present document may enhance the corresponding region according to the user selection.