Abstract: A method and an apparatus (400) for performing fault detection, are provided includes: controlling, by a power station management system in a preset photovoltaic module order by using an inverter connected to a current to-be-detected photovoltaic module, the current to-be-detected photovoltaic module to be in a target status, and when determining that the current to-be-detected photovoltaic module is in the target status, controlling a mobile image capturing terminal to collect image data of the current to-be-detected photovoltaic module (S201), where the image data is used to detect a fault status of the current to-be-detected photovoltaic module; and when determining that the mobile image capturing terminal obtains the image data of the current to-be-detected photovoltaic module through collection, continuing, by the power station management system, to control, in the preset photovoltaic module order by using an inverter connected to a next to-be-detected photovoltaic module.

Abstract: A pressure-preserving conventional triaxial compression loading apparatus of the present invention includes a pressure vessel, an upper piston rod, a lower piston rod, and an annular oil bag assembly. Hollow chambers of the pressure vessel in vertical communication sequentially include an upper chamber, an upper sealed chamber, a confining pressure chamber, a lower sealed chamber, and a lower chamber from top to bottom. The annular oil bag assembly is placed in the confining pressure chamber. When an annular inner chamber of an annular oil bag is filled with medium, an outer wall of the annular oil bag and an inner wall of the confining pressure chamber are attached together. A fidelity specimen is placed in a specimen chamber defined by a lower end surface of the upper piston rod, an upper end surface of the lower piston rod, and an inner wall of the annular oil bag. A variety of measuring sensors are disposed in the annular inner chamber of the annular oil bag.

Abstract: A converter and a power backfeed control method applied to a photovoltaic power generation system are provided. The power backfeed control method includes: controlling, according to a backfeed instruction, the converter to enter a backfeed mode, where in the backfeed mode, the converter can transmit energy of the power grid to a selected photovoltaic string with a corresponding number; determining a backfeed control voltage according to the backfeed instruction, and determining a voltage limit in a process of determining the backfeed control voltage; determining an actual backfeed voltage based on the backfeed control voltage and the voltage limit, where the actual backfeed voltage is a smaller one of the backfeed control voltage and the voltage limit; and controlling the converter to output the actual backfeed voltage to the selected photovoltaic string, to enable the selected photovoltaic string to generate an electroluminescent effect.

Abstract: The disclosure provides an OLED display substrate, a manufacturing method thereof, and a display device, wherein the OLED display substrate is provided with a display area and an edge area surrounding the display area, the OLED display substrate includes a back plate and a pixel-defining layer on the back plate, and a protrusion is provided on the back plate at the edge area of the OLED display substrate.

Abstract: Disclosed are a point cloud compression method, an encoder, a decoder, and a storage medium. In the method, the current block of a video to be encoded is obtained; geometric information of point cloud data of the current block and corresponding attribute information are determined; down-sampling is performed on the geometric information and the corresponding attribute information by using a sparse convolutional network so as to obtain hidden layer features; and the hidden layer features is compressed to obtain a compressed code stream.

Abstract: A fucosylated chondroitin sulfate oligosaccharide having the structure as shown in J, and further disclosed is a method for preparing the fucosylated chondroitin sulfate oligosaccharide: using a chondroitin sulfate A salt as a raw material, sequentially performing enzymolysis, a group protection operation, and glycosylation to synthesize the oligosaccharide compound; the certainty of the described structure allows said oligosaccharide to be applied to the medical field.

Abstract: A power system of a vehicle includes an engine, a first motor and a second motor. A method for controlling motion of the vehicle includes: receiving a cruise speed, a speed fluctuation quantity and a preset traveling mileage of the vehicle, and obtaining an upper speed bound and a lower speed bound of the vehicle based on the cruise speed and the speed fluctuation quantity; adjusting a current speed of the vehicle to the lower speed bound, and controlling the vehicle to enter a first cruise phase of a two-phase cruise mode; and controlling the vehicle to enter a second cruise phase of the two-phase cruise mode when the current speed of the vehicle is greater than or equal to the upper speed bound and a current traveling mileage is less than the preset traveling mileage.

Abstract: Provided are crosslinked polyvinylpyrrolidone (PVPP) compositions and their use in beverage treatment. Provided is a dry, direct compressed tablet comprising at lease 70 wt % crosslinked PVPP. Also provided is the use of said tablet for the filtering and/or removing polyphenol of a liquid, preferable a beverage.

Abstract: A pressure-preserving conventional triaxial compression loading apparatus of the present invention includes a pressure vessel, an upper piston rod, a lower piston rod, and an annular oil bag assembly. Hollow chambers of the pressure vessel in vertical communication sequentially include an upper chamber, an upper sealed chamber, a confining pressure chamber, a lower sealed chamber, and a lower chamber from top to bottom. The annular oil bag assembly is placed in the confining pressure chamber. When an annular inner chamber of an annular oil bag is filled with medium, an outer wall of the annular oil bag and an inner wall of the confining pressure chamber are attached together. A fidelity specimen is placed in a specimen chamber defined by a lower end surface of the upper piston rod, an upper end surface of the lower piston rod, and an inner wall of the annular oil bag. A variety of measuring sensors are disposed in the annular inner chamber of the annular oil bag.

Abstract: The present disclosure discloses an organic light emitting display device. The organic light emitting display device includes a substrate, an initializing voltage input line, a first electrode line, a thin film transistor, and an organic light emitting diode arranged on the substrate. The thin film transistor includes a first electrode, a second electrode and a control electrode, and the first electrode is coupled to the first electrode line, the initializing voltage input line is provided in the same layer and is made of the same material as one of the first electrode, the second electrode and the control electrode of the thin film transistor, and an extension direction of the initializing voltage input line is substantially the same as an extension direction of the first electrode line.

Abstract: A photovoltaic string location update method and apparatus includes: obtaining, based on a physical map, a physical location of a first photovoltaic string corresponding to a first logical location in the physical map, the physical map indicating a correspondence between a logical location of a photovoltaic string and a physical location of the photovoltaic string, and the photovoltaic string includes the first photovoltaic string; and when the physical location of the first photovoltaic string in the physical map is different from a first actual physical location of the first photovoltaic string, updating the physical location of the photovoltaic string in the physical map to the first actual physical location, to obtain an updated physical map. The first actual physical location of the photovoltaic string is inconsistent with the physical location in the physical map, to prepare for subsequent operation and maintenance accurately performed on the photovoltaic string.

Abstract: The present invention relates to a metal-organic hybrid lattice material and the application in the detection of radiation sources. In the invention, a water-soluble thorium salt and 2,2?:6?,2?-terpyridine-4?-carboxylic acid are subjected to a solvothermal reaction in water and an organic mixed solvent to obtain a metal-organic hybrid lattice material. The crystalline material produces radiation-induced discoloration and photoluminescence change under ultraviolet light, X-ray, ?-ray, ?-ray, and so on. The material is useful for qualitative and quantitative detection and calibration after high-dose irradiation. Compared with the traditional radiation-induced color change indicator labels, the material achieves the visual qualitative and quantitative detection and has strong radiation stability, high reuse rate, wide detection range, and good linear relationship, to solve the problem of traditional materials relying on professional optical equipment to quantify the radiation dose.

Abstract: A preprocessing system includes a first port, where one end of the first port is coupled to a first switch, and the other end of the first port is suspended, where the first switch has a connecting end configured to couple to a first interface and is configured to connect a filter and the first interface, a second port configured to receive a first signal or a second signal, where the filter is configured to filter the first signal to obtain a first positioning signal and a second positioning signal, provide the first positioning signal for the first switch, and provide the second positioning signal for a second interface of a global navigation satellite system (GNSS) chip to adapt to a plurality of antenna configuration types and to achieve universality.

Abstract: This application discloses a method and an apparatus for detecting a solar cell of a photovoltaic plant. The method includes: obtaining a first infrared image and a second infrared image, where the first infrared image includes infrared image information corresponding to an ambient infrared signal reflected by a to-be-detected solar cell operating in a short-circuit state, the second infrared image includes infrared image information corresponding to an infrared signal emitted by the to-be-detected solar cell operating in a first state and infrared image information corresponding to an ambient infrared signal reflected by the to-be-detected solar cell, and the first state is another state other than the short-circuit state; and detecting, based on the first infrared image and the second infrared image, whether the to-be-detected solar cell has a defect.

Abstract: This application provides a converter and a power backfeed control method that are applied to a photovoltaic power generation system. One end of the converter is connected to at least one photovoltaic string, and another end of the converter is connected to a power grid. Each photovoltaic string corresponds to one string number.

Abstract: Ultra-pure methyl vinyl ether-co-maleic anhydride (PMVE/MA) copolymers and the process to produce such ultra-pure polymers by removing trace impurities are provided. A process to provide an ultra-pure methyl vinyl ether-co-maleic anhydride material by solvent washing PMVE/MA copolymer with a solvent, comprises the steps of: (1) providing a solvent system in which impurities in the copolymer matrix are soluble and in which the PMVE/MA copolymer is not soluble, and wherein the solvent system does not react with the copolymer; (2) washing a dry powder or wet filter cake of PMVE/MA copolymer with the solvent system to efficiently and effectively extract trace impurities from the matrix; (3) filtering said copolymer from the solvent system; and (4) drying the subsequent wet filter cake of said copolymer to obtain an ultra-pure methyl vinyl ether-co-maleic anhydride copolymer.

Abstract: In a detection condition determining method, a control center obtains a working parameter value of a target photovoltaic device in a first time length closest to a current time point, where the working parameter value of the target photovoltaic device may be provided for the control center by a photovoltaic inverter coupled to the target photovoltaic device. The control center detects the target photovoltaic device in response to the control center determining, based on the working parameter value, that an environmental parameter value of the target photovoltaic device meets an environmental parameter threshold. Using the method helps reduce operation and maintenance costs of a photovoltaic power station.

Abstract: A hand-carry gravity-driven water filter with high throughput and water disinfection performance is formed. Membranes used for this water filter can be fabricated using electrospun method and non-solvent induced phase inversion method. A novel composite membrane structure (interwoven composite structure) was designed for further enhances water permeability and mechanical strength. The composite membrane can be composed of nanofibers with different diameter from the same polymer or different polymers. Membrane porosity and surface pore size can be controlled. Silver nanoparticles can be in-situ loaded on the surface of the membranes. The developed filter is effective for removal of a wide range of contaminants (e.g., pathogens, suspended solids and heavy metals). The purification process can be carried out under the drive of gravity (with an option for mechanically-enhanced filtration) without electricity.

Abstract: A real-time assessment method of driving risk based on equivalent force includes: S1, collecting traffic environment information and various types of traffic environment use object information in a road environment in an area to be assessed; S2, inputting, into an electronic control unit of a vehicle, the traffic environment use object information and the environment information acquired in S1, wherein a road risk assessment model based on the equivalent force distribution is preset in the electronic control unit; S3, using the road risk assessment model, so as to acquire road traffic risk E of the vehicle i and equivalent force distribution Fij between the vehicle i and the object j in different traffic environments, wherein the object j represents any traffic element other than vehicle i in various traffic environment use object information. A real-time assessment device of driving risk based on equivalent force is further provided.

Abstract: A fault detection apparatus includes an image capture module and a detection module, and the fault detection apparatus is configured to capturing an image of the photovoltaic module in a light emitting state, and performing fault detection on the photovoltaic module based on the image when a signal-to-noise ratio of the image is maximized, to identify a fault type of the photovoltaic module.