Abstract: A power supply system includes a switch unit and an operating mechanism. The switch unit includes: an arc-extinguishing functional component, a fixed contact assembly, a moving contact, and a first magnet assembly. The arc-extinguishing functional component is located inside the arc-extinguishing functional component and can move relative to the fixed contact assembly. The operating mechanism controls the switch unit to be opened when receiving a switch-off signal, so that the moving contact is separated from the fixed contact assembly. An electric arc is formed between the moving contact and the fixed contact assembly in a separation process. Directions of at least some magnetic induction lines of the first magnet assembly intersect a current direction of the electric arc to drive the electric arc to move towards the arc-extinguishing functional component. The first magnet assembly includes a first magnet and a second magnet that are spaced apart.

Abstract: A method for monitoring hydraulic fracturing range of a surface vertical shaft is provided by the present disclosure, belonging to the technical field of ultrahigh-pressure hydraulic fracturing monitoring of the coal mine vertical shafts.

Abstract: A photovoltaic system includes at least one first direct current module, an electromagnetic apparatus, a direct current switch-on/off apparatus, and a second direct current module. First connection ends of all first direct current modules in the at least one first direct current module are connected in parallel and then connected to a first connection end of the electromagnetic apparatus, a second connection end and a third connection end of the electromagnetic apparatus are connected to a first connection end of the second direct current module by using the direct current switch-on/off apparatus, and second connection ends of all the first direct current modules are connected in parallel and then connected to a second connection end of the second direct current module. The electromagnetic apparatus is configured to control the direct current switch-on/off apparatus to disconnect a loop between each first direct current module and the second direct current module.

Abstract: A switch, a power conversion apparatus, and a power supply system. The power supply system includes a control unit, a switch, a direct current source, and a power conversion unit. The switch is electrically connected between the direct current source and the power conversion unit, and the control unit is configured to send a switch-off signal to the switch when a fault occurs on the direct current source or the power conversion unit. The switch includes a contact component, a trip-free structure, and a knob that are sequentially disposed in a stacked manner in a first direction. A trip unit of the trip-free structure is configured to receive the switch-off signal, to unlock the trip unit from the cradle. The cradle drives the connecting rod structure to move, to separate the moving contact from the fixed contact.

Abstract: A rotary switch includes an operating mechanism, an on-off apparatus, and a tripping component. The operating mechanism includes an energy storage component and a drive component. The drive component is in driving connection with the energy storage component and the on-off apparatus. The energy storage component includes a latch and an energy storage spring that cooperates with the latch. The energy storage spring can be connected to the latch and the drive component in a snap-fit manner, such that rotation of the drive component stores energy in the energy storage component. Rotation of the drive component also drives the on-off apparatus to an on position. The latch the tripping component interact such that the latch locks or unlocks the energy storage spring.

Abstract: A remote switch-off mechanism and a rotary switch relates to the field of electrical technologies. A housing, an energy storage component, and a tripping component are provided. The energy storage component includes a latch, an energy storage spring, a rotating shaft, and an energy storage panel connected to the rotating shaft, an abutting portion is disposed on the energy storage panel, a first end of the energy storage spring is clamped to the housing, and a second end of the energy storage spring abuts against the abutting portion. The latch includes a hinged portion hinged to the housing, a limiting portion for limiting the second end of the energy storage spring, and a tripping portion that cooperates with the tripping component, and an elastic member is disposed between the latch and the housing, so that the tripping portion has a trend of moving toward the tripping component.

Abstract: A protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units via the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. According to the apparatus, a photovoltaic unit and a line are protected with a low power loss when a photovoltaic inverter is faulty.

Abstract: An electronic device for image color adjustment includes a display and a processor. The processor includes a display processing unit (DPU). The DPU obtains a to-be-displayed image, obtains, based on a first color mode, a target three-dimensional (3D) lookup table used to adjust the to-be-displayed image, maps a color of the to-be-displayed image based on the target 3D lookup table, to obtain an adjusted image, and sends the adjusted image to the display for displaying.

Abstract: A system and a method for monitoring overlying roof rock and coal pillar in gob-side entry are provided. The system includes top monitoring stations, coal pillar comprehensive monitoring stations, roof stress monitoring stations, and a master computer. Top monitoring stations are arranged in the crossheading to monitor the working face, coal pillar comprehensive monitoring stations are arranged in the upper roadway of the lower coal seam working face to monitor the coal pillars, and roof stress monitoring stations are arranged in the mining area main roadway to monitor the coal pillars. Monitoring the stress and deformation distribution of coal pillars in the goaf and the movement and failure process of overburden strata structure through the master computer control each monitoring station. The monitoring stations ensure that the overburden strata movement monitoring stations are still in working condition after the goaf is formed by mining in the working face.

Abstract: A protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units via the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. According to the apparatus, a photovoltaic unit and a line are protected with a low power loss when a photovoltaic power generation system is faulty.

Abstract: Discloses are a microscopic imaging system and a microscopic imaging method for sample angle recognition. Firstly, a polarization rotation device introduced in an optical path of an excitation light can polarize and modulate the excitation light so as to make a polarization-modulated excitation light to rotate in a preset angle range; secondly, the polarization-modulated excitation light can be splitted into two parts via a beam splitting device, one for sample imaging, and the other for detection of polarization; and finally, a plurality of model characteristic curves can be obtained by a polarization detection device, each of the model characteristic curves corresponding to one angle, thus determining an angle information about an object to be analyzed in the sample.

Abstract: This application discloses a display brightness adjustment method, including: an electronic apparatus obtains a to-be-displayed image and calculates an average pixel level APL of the to-be-displayed image. The electronic apparatus determines, based on the third light adjustment curve, an actual display brightness value corresponding to the average pixel level of the to-be-displayed image. The electronic apparatus adjusts display brightness of the to-be-displayed image based on the actual display brightness value. In this way, impact exerted on contrast when brightness is turned down at a low APL can be ensured, and a high contrast effect of image brightness of an HDR display can be ensured.

Abstract: A photovoltaic power generation system includes a protection switch and a plurality of DC-DC converters. Each DC-DC converter includes a direct current bus, a DC-DC circuit, and at least one input interface. The input interface is configured to connect to a photovoltaic unit. The photovoltaic unit includes at least one photovoltaic module. The input interface is connected to the direct current bus by using the protection switch, the direct current bus is connected to an input end of the DC-DC circuit, and an output end of the DC-DC circuit is an output end of the DC-DC converter. The protection switch includes a release device and a switching device that are connected in series. The release device is configured to: when a short-circuit fault occurs on a line in which the release device is located, control the switching device to be disconnected.

Abstract: An electronic device for image color adjustment includes a display and a processor. The processor includes a display processing unit (DPU). The DPU obtains a to-be-displayed image, obtains, based on a first color mode, a target three-dimensional (3D) lookup table used to adjust the to-be-displayed image, maps a color of the to-be-displayed image based on the target 3D lookup table, to obtain an adjusted image, and sends the adjusted image to the display for displaying.

Abstract: A photovoltaic power generation system includes a protection switch and a plurality of DC-DC converters. Each DC-DC converter includes a direct current bus, a DC-DC circuit, and at least one input interface. The input interface is configured to connect to a photovoltaic unit. The photovoltaic unit includes at least one photovoltaic module. The input interface is connected to the direct current bus by using the protection switch, the direct current bus is connected to an input end of the DC-DC circuit, and an output end of the DC-DC circuit is an output end of the DC-DC converter. The protection switch includes a release device and a switching device that are connected in series. The release device is configured to: when a short-circuit fault occurs on a line in which the release device is located, control the switching device to be disconnected.

Abstract: A display method for an electronic device including a first display area and a second display area. In the method, the electronic device determines a first application mode, adjusts, based on the first application mode, intensity values of color channels, stored in a hardware composer (HWC), determines, using the HWC, each first layer corresponding to the first display area, and overlays, using the HWC, the first layer and a background color layer corresponding to adjusted intensity values of the color channels. In an overlay process, the background color layer is located below the first layer, and the background color layer corresponds to the second display area. Then, the display is used to display an overlaid image.

Abstract: A photovoltaic system includes at least one first direct current module, an electromagnetic apparatus, a direct current switch-on/off apparatus, and a second direct current module. First connection ends of all first direct current modules in the at least one first direct current module are connected in parallel and then connected to a first connection end of the electromagnetic apparatus, a second connection end and a third connection end of the electromagnetic apparatus are connected to a first connection end of the second direct current module by using the direct current switch-on/off apparatus, and second connection ends of all the first direct current modules are connected in parallel and then connected to a second connection end of the second direct current module. The electromagnetic apparatus is configured to control the direct current switch-on/off apparatus to disconnect a loop between each first direct current module and the second direct current module.

Abstract: A protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units via the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. According to the apparatus, a photovoltaic unit and a line are protected with a low power loss when a photovoltaic power generation system is faulty.

Abstract: This application discloses a power distribution cabinet which includes a cabinet body, a first air duct assembly, and a second air duct assembly. The first air duct assembly is disposed outside the cabinet body, and the first air duct assembly is disposed on the first side wall of the cabinet body. A projection of the first air duct assembly on the first side wall covers the first air vent and the second air vent. A first circulation space is formed between the first air duct assembly and the first side wall. The first circulation space communicates with an internal space of the cabinet body through the first air vent and the second air vent. The second air duct assembly is disposed inside the cabinet body, and the second air duct assembly forms a second circulation space. The second circulation space communicates with the first air vent.

Abstract: A display screen aging compensation method, system, and device, the method including obtaining display data of each display area of a display screen having at least one display area, the display data including usage time t of the display area, a maximum gray level value Lev_max that is of each primary color and that is obtained before the display data, and an average gray level value Lev of each primary color of three primary colors within the usage time t, where the usage time is accumulated screen-on time that is of the display area and that is obtained after the display screen is powered on, obtaining a decay ratio of each primary color of the display area based on the display data, and performing aging compensation on each display area based on the decay ratio of each primary color of each display area.