Abstract: An automatic pressure regulating valve for an electro-pneumatic braking system of a commercial vehicle comprises an upper valve body and a lower valve body. The upper valve body includes a normally open switching valve, a quick-acting intake valve, a normally open quick-acting intake valve, a quick-acting exhaust valve, and a control chamber A. A lower valve body includes a relay valve and a working chamber B. The normally open switching valve has a manually controlled air inlet a and an electronically controlled air inlet b, and an air outlet c connected to an air inlet d of the normally open quick-acting intake valve. An air outlet e of the normally open quick-acting intake valve, an air inlet f of the quick-acting exhaust valve and an air outlet i of the quick-acting air intake valve are connected together to the control chamber A.

Abstract: A method and system for fingerprint positioning based on 5G multi-beam downlink signals, includes: extracting multi-beam SSB from 5G downlink signals, and obtaining multi-beam SSS signal and DM-RS signal from multi-beam SSB; calculating multi-beam reference signal received power RSRP based on multi-beam SSS signal and DM-RS signal; calculating the RSSI of 5G downlink synchronization channel based on multi-beam SSB autocorrelation, and calculating the multi-beam reference signal received quality RSRQ based on multi-beam RSRP and RSSI; stacking the multi-beam RSRP and RSRQ to form multi-beam fingerprint features; inputting multi-beam fingerprint characteristic into neural networks, and the neural networks output positioning results.

Abstract: The invention discloses a method and system for detecting and repairing sun glint in UAV optical RGB ocean image, introduces a sun glint attention module, and constructs a semantic segmentation network model based on attention mechanism. The sun glint region is segmtioned by semantic segmentation network model based on attention mechanism, and the optical flow field of high-resolution UAV optical RGB ocean image is extracted by RAFT optical flow estimation network. sun glint region and optical flow field are used for optical flow propagation to repair the sun glint in UAV optical RGB ocean images and restore the real benthic image features.

Abstract: The application provides drugs, expression vectors, and their applications in the treatment of NAFLD and related diseases, pertaining to the technical field of targeted drugs. The drugs include streptavidin or a recombinant expression vector for streptavidin. Streptavidin can bind to acetyl CoA carboxylase 1, alter its subcellular localization within mammalian cells, and ultimately inhibit de novo lipogenesis. Ectopic expression of streptavidin can inhibit lipid accumulation within mammalian cells. Compared with chemical small-molecule drugs, streptavidin, as a protein drug, exhibits relatively lower liver and kidney toxicity. Streptavidin might be a relatively mild inhibitor of acetyl CoA carboxylase, avoiding a severe side effect of hyperlipidemia. Furthermore, streptavidin is very stable, which might be conducive to drug delivery and adaptable to different administration methods.

Abstract: An aluminum alloy pre-strengthening and hot forming production line is provided, including a pre-strengthening heat treatment mechanism, a forging mechanism, and a trim press. The pre-strengthening heat treatment mechanism includes a roll forging machine, a solid solution furnace, a quenching water tank, an aging furnace, and a heat preservation furnace. The forging mechanism includes an upsetting press machine, and a forging press machine. The upsetting press machine is configured for blanking an heat preserved aluminum alloy bar-shaped blank, and the forging press machine is configured for forging and forming the blanked aluminum alloy bar-shaped blank. The trim press is configured for trimming the forged and formed aluminum alloy rod-shaped blank, so as to obtain an aluminum alloy member meeting a requirement.

Abstract: An aluminum alloy pre-strengthening and hot forming production line is provided, including a pre-strengthening heat treatment mechanism, a forging mechanism, and a trim press. The pre-strengthening heat treatment mechanism includes a roll forging machine, a solid solution furnace, a quenching water tank, an aging furnace, and a heat preservation furnace. The forging mechanism includes an upsetting press machine, and a forging press machine. The upsetting press machine is configured for blanking an heat preserved aluminum alloy bar-shaped blank, and the forging press machine is configured for forging and forming the blanked aluminum alloy bar-shaped blank. The trim press is configured for trimming the forged and formed aluminum alloy rod-shaped blank, so as to obtain an aluminum alloy member meeting a requirement.

Abstract: The disclosure relates to a phase change thermal storage ceramic having high service temperature and improved utilization rate and utilization efficiency of heat. It is prepared at a low cost with a simple, easy-to-industrially-realized method. A mixture is obtained by mixing and stirring evenly 50-85 wt % of fused mullite powder, 10-45 wt % of pretreated aluminum-silicon alloy powder, and 3-8 wt % of ball clay. A ceramic body is formed by press molding the mixture at 80-150 MPa. The ceramic body is cured at 25-28° C. and a relative humidity of 70-75 RH for 24-36 h, dried at 80-120° C. for 24-36 h, and held at 1,100-1,300° C. for 3-5 h to prepare the phase change thermal storage ceramic. The pretreated aluminum-silicon alloy powder is prepared by holding aluminum-silicon alloy powder in water vapor at 0.02-0.20 MPa for 0.5-3 h to impregnate in an alkaline silica sol and drying the impregnated powder.

Abstract: Recombinant protein of GPER is provided. The recombinant protein has the biological activity of G protein-coupled estrogen receptor.

Abstract: A manufacturing method for ceramics with complex structure by laser 3D printing, includes acquiring a three-dimensional model of a complex component to be fabricated, and devising a laser scanning path; placing a substrate in a gas-phase reactor chamber, followed by vacuuming and aerating vapor mixture of gas-phase precursors and carrier gas into the gas-phase reactor chamber; preheating the substrate to a specified temperature, turning on a laser and a thermal imager, the thermal imager controlling laser power in real time by generating a two-dimensional temperature map of a laser spot to realize temperature control a the printing process; setting a distance between the flat-field focusing lens and the substrate and a laser scanning speed; after stacking another one of the ceramic sheets repeatedly, until completing a fabrication of a ceramic complex component.

Abstract: The present disclosure provides a method, apparatus, medium and device for extracting a river drying-up region and frequency, and belongs to the technical field of remote sensing. The method for extracting a river drying-up region and frequency can be applied to efficiently acquiring river drying-up information for a long time within the large spatial region. With the inverse normalized difference water index (iNDWI) and the maximum value composite (MVC) method for the remote sensing images, the present disclosure omits the troublesome step of separately extracting a river range for each image in the conventional method. In addition, the present disclosure quickly obtains the drying-up frequency by counting the total number of available images and the number of non-water images at the same pixel position, and yields a greater efficiency for extracting the river drying-up region and frequency.

Abstract: Disclosed is a ship image track tracking and prediction method based on ship heading recognition, which includes the following steps: obtaining a ship image data set, preprocessing the data set to obtain a preprocessed data set; inputting the preprocessed data set into the rotating ship detection network for training, obtaining the trained rotating ship detection network, collecting the ship navigation video, and inputting the ship navigation video into the trained rotating ship detection network to obtain the ship detection result; inputting the ship detection result into the rotating ship tracking network and tracking the target ship to obtain the historical trajectory and the heading information of the target ship; inputting the historical trajectory and ship heading information of the target ship into the ship trajectory and ship heading prediction network, and predicting the navigation trajectory and ship heading at sea.

Abstract: The present invention belongs to animal experiments field, disclosed a single factor modeling-constraint method and device for mice chronic fatigue syndrome, the modeling-constraint method is specifically using mineral water bottle to restraint mice; the mineral water bottle is divided into upper, middle and lower parts; the body of mineral water bottle is uniformly drilled for mice to breathe; the inner of the mineral water bottle is blocked by a cardboard to reduce the move space of mice; cover the mice through the divided bottle; one end of the opening is tightly attach to the wall, the other end is tightly attach to the mice feeding box, and keeping 30 minutes to restraint. The present invention utilizes mineral water bottle to make three simple restraint tube, not only saves the costs of experiment, but also turns waste into treasure, which is a simple operation, and increases the possibility of the experiment.

Abstract: Provided herein is a laser processing system integrated with an MBE device, including an MBE growth chamber, a sample table, an optical path mechanism, a heat insulation mechanism, and a cooling mechanism. An opening is formed in a side of the MBE growth chamber. The sample table is fixed in the MBE growth chamber, corresponds to a position of the opening, and is used for placing a substrate sample material. The optical path mechanism is relatively arranged on a side of the MBE growth chamber, and the optical path mechanism is provided with a light-emitting end. A side of the light-emitting end penetrates through the opening of the MBE growth chamber, extends into the MBE growth chamber, and is spaced apart from the sample table. The optical path mechanism is sealedly connected to the opening of the MBE growth chamber.

Abstract: Disclosed is a method, device, and system for testing the static contact angle of reagent asphalt, the method includes the following steps: acquiring a side image of a stable droplet formed by a test reagent on asphalt surface, and determining the position of a baseline in the side image; cropping the side image to obtain a droplet image, and extracting droplet contour points in the droplet image; screening out effective contour points corresponding to contours of the two sides of the droplet from the droplet contour points; performing cubic polynomial fitting on the effective contour points to obtain curve function of contour curves on both sides; calculating contact angle value from the curve function and the position of the baseline. The beneficial effects of this disclosure are: this disclosure reduces the difficulty of fitting of the droplet contour and thus improves the calculation precision of the contact angle.

Abstract: The invention discloses a method and system for detecting and repairing sun glint in UAV optical RGB ocean image, introduces a sun glint attention module, and constructs a semantic segmentation network model based on attention mechanism. The sun glint region is segmtioned by semantic segmentation network model based on attention mechanism, and the optical flow field of high-resolution UAV optical RGB ocean image is extracted by RAFT optical flow estimation network. sun glint region and optical flow field are used for optical flow propagation to repair the sun glint in UAV optical RGB ocean images and restore the real benthic image features.

Abstract: Disclosed is a ship detection and tracking method and device, the method comprises: pre-training a yolov5s network model with a first preset number of high-speed moving object datasets to obtain an initial ship detection model; adding a preset attention mechanism to the initial ship detection model to obtain a transitional ship detection model; inputting a second preset number of annotated ship datasets into the initial ship detection model with the preset attention mechanism for training to obtain a target ship detection model; inputting an original ship video frame into the target ship detection model, and outputting the position information of the ship to be tracked; performing ship video image tracking on the ship to be tracked according to the position information. This disclosure performs pre-training, which only requires a small amount of annotated ship data to determine the target ship detection model, achieving video image tracking of the target ship.

Abstract: An automatic pressure regulating valve for multiple levels of driving automation of a commercial vehicle includes an upper valve body, a lower valve body, a piston, a main valve core assembly, a switching valve, a quick-acting intake valve, and a quick-acting exhaust valve. The switching valve, the quick-acting intake valve and the quick-acting exhaust valve are all mounted at an upper end of the upper valve body. The piston is located in a chamber formed by the upper valve body and the lower valve body to divide the chamber into an upper control chamber and a lower chamber. The main valve core assembly is mounted in the lower valve body. The automatic pressure regulating valve is applicable to a commercial vehicle allowing for multiple levels of driving automation.

Abstract: Disclosed are a vector synchronization method and system, the method includes: converting a three-phase instantaneous value of a power grid voltage into a two-phase voltage vector component through employing a power grid voltage vector phase angle at a previous moment; subtracting the d-axis voltage vector component from the power grid vector amplitude to obtain a d-axis voltage component deviation; performing gain and integral operations on the d-axis voltage component deviation to obtain a power grid vector amplitude; performing gain, integral and proportional-integral operations on the q-axis voltage component deviation to obtain a power grid voltage vector phase angle; respectively converting the d-axis voltage component deviation and the q-axis voltage component deviation into a q-axis current compensation signal and a d-axis current compensation signal of the grid-connected inverter; and the small interference stability of the grid-connected inverter is enhanced by adopting d-axis and q-axis current com

Abstract: A real-time measurement system for mechanical parameters of rock slag during excavation includes a rock slag conveyor belt configured to convey rock slag; cleaning device, located on both sides of the rock slag conveyor belt, configured to clean the rock slag; an image acquisition device, located behind the cleaning device and on both sides and above the rock slag conveyor belt, configured to collect images of rock slag; an on-site loading device, for conducting on-site mechanical loading procedure on the rock slag to obtain on-site mechanical parameters. The on-site loading device includes a loading bottom plate, a push plate and a pressure head. The loading bottom plate is provided with a loading area. The push plate is located on the loading bottom plate and pushed by a pushing mechanism to push the rock slag.

Abstract: The present invention discloses a grating enhanced distributed vibration demodulation system based on three-pulse shearing interference, comprising: a laser device, a pulse optical modulator, a three-pulse generation polarization-maintaining structure, a first erbium-doped fiber amplifier, a first optical circulator, a fiber grating array, a second erbium-doped fiber amplifier, a second optical circulator, a three-in-three optical coupler, a first Faraday rotator mirror, a second Faraday rotator mirror, and a four-channel data acquisition card, On the basis of a distributed fiber grating vibration sensing system, three-pulse dislocation interference and three-in-three optical coupler digital phase demodulation technologies are adopted, XX and XY pulses are utilized to complement interference visibility, and demodulation is performed by selecting a better path, so that polarization fading resistance and interference signal high visibility in the distributed fiber grating vibration sensing system are realized.