Abstract: A control system and a control method of refrigeration in a closed space based on computer vision are provided. An image of a food, temperature and humidity information in the closed space are collected, and a type of the food is identified according to the image. The image is processed through Euler video amplification when food is not packaged to obtain surface color distribution information of the food, a state of the food is determined according to the surface color distribution information and a historical learning result, and a state prompt corresponding to the state of the food is provided to a user. Temperature and humidity in the closed space are regulated according to the state of the food. The state of the food is determined according to storage time and a known quality guarantee period when the food is packaged, and another state prompt is provided to the user.

Abstract: A method for detecting a surface defect based on a perceptual autoencoder is provided, which belongs to the field of integrated circuit defect detection. By using perceptual loss instead of pixel-by-pixel loss, the problem of blurred single-pixel-loss output image with serious distortion at the edges is solved. This manner is highly migratory, and it may migrate well to the new target to be detected. On the other hand, by using the feature pyramid instead of the sliding window manner, the feature pyramid does not require a plurality of redundant computation by sliding on the original image, which effectively reduces the memory and computation cost. A system for detecting a surface defect based on a perceptual autoencoder is also provided, which includes specific modules for implementing the above method. In addition, a computer device and a storage medium of the above method are provided, for accomplishing operations of the above method.

Abstract: The present invention provides anti-HBV compounds, pharmaceutically acceptable compounds or stereoisomers thereof, and preparation methods and uses for treating, eradicating or inhibiting HBV infection or for alleviating liver injury caused by HBV infection, and so on.

Abstract: The present disclosure discloses a vacuum degree detection device, a monitoring system and a vacuum arc-extinguishing chamber thereof, wherein, in the vacuum degree detection device, a ceramic insulating housing is sealingly fixed to an end face cover plate of the vacuum arc-extinguishing chamber, the ceramic insulating housing is a circular ring-shaped structure coaxial with a conductive rod on the end face cover plate, a sealing area formed by the end face cover plate and the ceramic insulating housing is provided with a through hole communicating with the vacuum arc-extinguishing chamber; a thermoelectric vacuum sensor is disposed inside the ceramic insulating housing to detect the vacuum degree of the vacuum arc-extinguishing chamber, a cold end is fixed to the end face cover plate, an electrode is supported on the cold end, a thermoelectric arm is supported on the electrode, a hot end is laminated to the thermoelectric arm.

Abstract: The present invention provides a salt of a bile acid derivative, a crystal form thereof, a preparation method therefor and use thereof. The salt of a bile acid derivative, the crystal form thereof and a composition thereof provided by the present invention can improve cholestasis, reduce portal pressure, and improve liver function, and can be used for preparing medicaments for treating or alleviating chronic liver diseases, metabolic diseases, portal hypertension and related diseases.

Abstract: The present invention relates to the technical field of magnetron sputtering process, and specifically to a method for improving the uniformity of rare earth nickelate thin film deposited by reactive magnetron sputtering, comprising the following steps: adjusting the sputter angle of a Ni target toward a substrate to perform magnetron sputtering to deposit a thin film, and obtaining the content data of the Ni element in the deposited thin film; analyzing the content data of the Ni element to screen out the sputter angle for realizing zero-gradient deposition of the Ni element on the substrate surface; similarly, screening out the sputter angle for realizing zero-gradient deposition of the RE element on the substrate surface; preparing a nickelate thin film according to the screened zero-gradient sputter angle of Ni target material and the RE target material so as to improve the deposition uniformity of the rare earth nickelate thin film.

Abstract: An aerial seeding bioremediation method for a coal mining subsidence area. The method includes obtaining a topographic map of the coal mining subsidence area; grading the topographic map in terms of ground slopes; determining seeding coefficients of aerial seeding operation according to a grading result of the ground slopes and ground coverage rates of the coal mining subsidence area; determining height adjustment parameters during unmanned aerial vehicle, UAV, aerial seeding; and performing, by a UVA, the aerial seeding operation according the grading result of the ground slopes, the seeding coefficients of the aerial seeding operation, and the height adjustment parameters. A slop grading technical standard of aerial seeding determined by the method of the present disclosure is applicable to complex topography of the coal mining subsidence area and helps with safety of the UVA.

Abstract: A tracking type flexible photovoltaic bracket is provided, including photovoltaic assemblies, pillars, a driving member, direction-changing mechanisms, and two pulling ropes. Each of the pillars is disposed with a double-rope grooved wheel. The driving member is configured to drive the double-rope grooved wheel arranged on an end of the driving member to rotate. The direction-changing mechanisms are arranged corresponding ones of the pillars in one-to-one manner. Each of the direction-changing mechanisms includes a worm gear assembly and a curved plate assembly. Each of the corresponding ones of the pillars is rotatably connected with the worm gear assembly and the curved plate assembly, and a bottom of the curved plate assembly is disposed with a gear rack. First ends and second ends of the two pulling ropes are wound on the respective double-rope grooved wheels being respectively located on the first ends and the second ends.

Abstract: The present invention discloses a multi-header pipe distributing annular printed circuit heat exchanger, and pertains to the technical field of heat exchangers, the heat exchanger includes: a front head configured to achieve same side entry and exit of a cold fluid; a core body with one end thereof connected with the front head and configured to achieve distributing of cold fluid entry and exit; a hot fluid inlet cavity provided in a middle portion of the core body and configured to achieve entry of a hot fluid; a shell sheathed outside the core body, and the shell and the core body provided with a gap for collecting the hot fluid; and a lower cover plate connected with one end of the core body and configured to block the hot fluid inlet cavity. The present invention can improve compactness and power density of the heat exchanger, reduce volume and weight.

Abstract: An internal combustion engine with an external circulation system and a working method thereof are provided. The internal combustion engine is externally connected to the external circulation system through an intake port and an exhaust port. The external circulation system is capable of operating in a circulating manner when the internal combustion engine is not running, a significant raise in intake temperature is achieved during intake heating or exhaust heating, thereby the cold start-up performance of the internal combustion engine is improved and harmful emissions during cold start-up is reduced, and a compression ignition working mode of a low compression ratio engine is facilitated to be achieved.

Abstract: The present disclosure provides a method for treating arthritis by using a stem cell preparation. The stem cell preparation of the present disclosure can effectively delay cartilage degeneration caused by arthritis, and it is confirmed by whole blood analysis and blood biochemical analysis that the stem cell preparation in the form of three-dimensional stem cell spheres provides a safe treatment for arthritis. The present disclosure also provides a method for preparing the stem cell preparation.

Abstract: Present disclosure a multi-component supercritical thermal fluid generation system and method with segmented air supply. The outlet of a water tank is communicated with the preheated water inlet of a multi-component supercritical thermal fluid generator body, the preheated water outlet of the multi-component supercritical thermal fluid generator body is communicated with the cold fluid inlet of a heat exchanger, the product outlet at the upper part of the multi-component supercritical thermal fluid generator body is communicated with the thermal fluid inlet of the heat exchanger, and the slag outlet at the lower part of the multi-component supercritical thermal fluid generator body is communicated with the inlet of a slag discharge lock hopper.

Abstract: A method for preparing fluorescent carbon quantum dots by using gas-liquid two-phase plasma is provided, which relates to the field of fluorescent carbon quantum technology. On the basis of liquid phase plasma, an inert gas is introduced to generate plasma by a gas-liquid two-phase discharge method. The introduction of inert gas facilitates the formation of discharge channels, reduces the difficulty of product synthesis, improves mass transfer rates of active particles, helps to improve synthesis rates of carbon nano-products, increases discharge contact area and enhances discharge stability. A high reaction efficiency and a short time consumption can be realized. A pulsed power supply is adopted for discharge, which has lower energy consumption compared with the direct current discharge. Moreover, the process is simple, raw materials are easy to obtain, and there is no need for catalysts, strong oxidants or strong corrosives, so the purity of the product maybe higher.

Abstract: The present invention relates to an I-type recombinant collagen with high transdermal absorbability, and the use thereof. The human I-type recombinant collagen with high transdermal absorbability of the present invention is composed of multiple repetitions of a short amino acid sequence from natural human I-type collagen as a repeating unit, wherein the short amino acid sequence is as shown in SEQ ID NO: 1, and the number of repetitions is three or more. The human I-type recombinant collagen with high transdermal absorbability of the present invention can be used as a raw material for producing various collagen products, such as an injection, a facial filler, a dressing, cosmetics, a health-care food product, tissue engineering material and a collagen sponge.

Abstract: The present invention relates to a high-transdermal-absorption peptide and I-type recombinant collagen constructed by means of repetitions of the peptide. The high-transdermal-absorption I-type recombinant collagen of the present invention is formed by means of multiple repetitions of the twenty-first peptide amino acid sequence from natural human I-type collagen as a repeating unit, wherein the sequence of the twenty-first peptide amino acid is as shown in SEQ ID No.: 1, and the number of repetitions is at least three. The high-transdermal-absorption I-type recombinant collagen can be used as a raw material for producing various collagen products, such as injections, facial fillers, dressings, cosmetics, healthcare foods, tissue engineering materials, collagen sponges, etc.

Abstract: The present disclosure relates to a method for obtaining lead-free piezoelectric materials, including: Step S100, adjusting the T/O phase boundary of a first lead-free piezoelectric material: for the first lead-free piezoelectric material, adjusting the T/O phase boundary between the tetragonal phase T and the orthorhombic phase O to be near the room temperature by doping; Step S200, further adjusting the C/T phase boundary and the O/R phase boundary: further adjusting the C/T phase boundary between the cubic paraelectric phase C and the tetragonal phase T, and the O/R phase boundary between the orthorhombic phase O and the rhombohedral phase R by doping, so as to enable the C/T phase boundary and the O/R phase boundary to approach the T/O phase boundary; and Step S300, obtaining second lead-free piezoelectric materials: obtaining multiple second lead-free piezoelectric materials with different piezoelectric constants d33 and different Curie temperatures TC in the process.

Abstract: The present disclosure relates to an in-plane two-dimensional translational optical actuator. The in-plane two-dimensional translational optical actuator includes a fixed plate, a translational plate, i elastic assemblies located between the fixed plate and the translational plate and with two ends connected to the fixed plate and the translational plate respectively, and j electromagnetic drive assemblies fixed between the fixed plate and the translational plate. Each elastic assembly is composed of elastic elements of the same or different quantities, and at least one elastic assembly in the i elastic assemblies has two or more elastic elements. The j electromagnetic drive assemblies are disposed in a plane in two different directions, and used to drive the translational plate to move relative to the fixed plate within a plane where the translational plate is located in two different directions, so as to achieve two-dimensional translation of the translational plate.

Abstract: A system and a method are provided to create an indoor thermal environment based on impinging jet ventilation (IJV) and ductless personalized ventilation (DPV), the system includes an IJV duct installed on a wall of a room and a DPV device installed on a table. An air inlet of the IJV duct is connected to an air conditioning system and an air outlet of the IJV duct is close to ground. An upper duct and a lower duct of the DPV device are disposed on two opposite sides of a tabletop, the upper duct is provided with an air supply panel, the lower duct is provided with a duct fan with an air supply volume being adjustable, and the duct fan is configured to send air absorbed from a ground air lake to a user's face area through the air supply panel of the upper duct.

Abstract: The present disclosure relates to a method, a device and a computation apparatus for allocating a space address to data in a memory, where the computation apparatus is included in a combined processing apparatus, which includes a general interconnection interface and other processing apparatuses. The computation apparatus interacts with other processing apparatuses to jointly complete computations specified by the user. The combined processing apparatus also includes a storage apparatus. The storage apparatus is respectively connected to the computation apparatus and the other processing apparatuses, and is used for storing data of the computation apparatus and other processing apparatuses. The technical solutions of the present disclosure improve utilization of storage space of the memory.