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149results about How to "Efficiently obtained" patented technology

Remote sensing image change detection method based on adaptive Transform and deformable convolution

The invention discloses a remote sensing image change detection method based on an adaptive Transform and a deformable convolution. The method comprises the following steps: firstly, establishing a twin feature extraction encoder fusing adaptive Transform and deformable convolution for extracting multi-scale local-global features of a dual-temporal remote sensing image; secondly, an adaptive Cross-Transform high-order feature interaction module is designed, and the adaptive Cross-Transform high-order feature interaction module is used for extracting high-level semantic change information and inhibiting irrelevant information interference; thirdly, providing a difference extraction module to generate different levels of difference feature maps so as to obtain a multi-scale change region; and finally, constructing a multi-scale fusion decoder, fusing the multi-level feature maps layer by layer, and further enhancing the feature expression of the change region. According to the method, the advantages of the Transform and the CNN are combined, the designed adaptive Transform and adaptive Cross-Transform can effectively extract the global features of the change region, and the adopted deformable convolution can effectively extract the local features of the change region, so that the overall performance of change detection is improved.
Owner:HOHAI UNIV

Method for evaluating intelligence degree of smart home equipment

The invention provides a method capable of comprehensively evaluating the intelligent degree of household intelligent home equipment, and the method comprises the steps: reasonably selecting architecture parameters capable of reflecting the intelligent degree; data required by architecture parameters can be effectively obtained by collecting and analyzing multi-dimensional data such as categories, quantity and scores of household intelligent household equipment and App application use conditions, and meanwhile, intelligent degree scores required by model training are set in a reasonable mode, so that the intelligent degree of the intelligent household equipment is improved. And finally, a linear model is adopted to construct a scoring model, so that the development difficulty can be effectively reduced, the evaluation accuracy can be improved, and a convenient and effective evaluation means is provided for subsequent users, operators and the like. According to the method, whether the user uses the intelligent equipment or not can be judged through the App accessed by the user, a relatively reasonable score is made for a family of which the equipment model cannot be captured according to the App, and two sets of rating standards are further adopted, so that the matching between the score and the rating can be effectively ensured, and the reliability of an output result is improved.
Owner:SUZHOU MAXNET NETWORK SECURITY TECH CO LTD

Organic acid leaching regeneration method of waste nickel-zinc battery negative electrode material

The invention provides an organic acid leaching regeneration method of a waste nickel-zinc battery negative electrode material, and belongs to the technical field of resource recycling and reutilization, and the method comprises the following steps: disassembling a waste nickel-zinc battery, separating to obtain a negative electrode sheet, and calcining to obtain negative electrode powder; placing the negative electrode powder in an organic acid solution, ultrasonically stirring to dissolve zinc, and filtering to obtain a leaching solution; adding sodium hydroxide particles into the leachate until white precipitates are generated, standing, filtering and drying to obtain a precursor, and calcining the precursor to obtain zinc oxide powder. According to the method, inorganic acid leaching is adopted, the regenerated product can be used for the nickel-zinc battery, and no waste liquid discharge can be realized. Compared with the prior art, the method has the advantages that organic acid which is small in environmental harm is used, almost no liquid is discharged, zinc can be effectively recycled, and the method is short in process and low in cost. The method has the characteristics of greenness, high efficiency and simple process, and is beneficial to further realization of commercialized development.
Owner:SHENZHEN AUTOMOTIVE RES INST BEIJING INST OF TECH (SHENZHEN RES INST OF NAT ENG LAB FOR ELECTRIC VEHICLES) +1

SiC single crystal block, method for producing SiC single crystal block, and method for producing SiC substrate

The purpose of the present invention is to provide: a SiC single-crystal ingot from which a large number of SiC substrates can be efficiently obtained; a method for producing a SiC single-crystal ingot; and a method for producing a SiC substrate. The SiC single crystal block according to the present embodiment includes, in a cut plane orthogonal to the crystal growth direction, a portion in which the length of a line segment that passes through the center of the largest inscribed circle enclosed by the cut plane and connects a first outer peripheral point and a second outer peripheral point of the cut plane is 211-221 mm.
Owner:RESONAC CORP

RhFN recombinant human chemical fibronectin process of genetic engineering technology

The invention discloses an rhFN recombinant human chemical fibronectin process of a genetic engineering technology, and particularly relates to the technical field of genetic engineering, and the rhFN recombinant human chemical fibronectin process comprises target gene acquisition, gene cloning and vector construction, host cell selection and transformation, cell culture and screening, protein expression and optimization, and protein separation and purification. According to the rhFN recombinant human chemical fibronectin process of the genetic engineering technology provided by the invention, high-quality target genes are accurately obtained through technologies such as new-generation sequencing and gene synthesis, and the gene expression efficiency and stability are enhanced by virtue of optimized vector construction and regulatory elements; protein expression ability and specificity are improved in host cell selection and transformation, efficient culture and accurate screening are realized in cell culture and screening links, total yield is increased in a protein expression optimization link, purity and efficiency are improved in a protein separation and purification link, and product quality and safety are ensured through comprehensive quality control. The requirements in the fields of medical treatment and scientific research are expected to be better met.
Owner:GUANGZHOU BIOSPHERE COSMETICS CO LTD

Deer myocardial peptide capable of replenishing qi and enriching blood as well as preparation method and application of deer myocardial peptide

The invention discloses deer myocardial peptide capable of replenishing qi and enriching blood as well as a preparation method and application of the deer myocardial peptide, and relates to the technical field of functional foods. The preparation method comprises the following steps: uniformly mixing fresh deer heart and a fermentation composition, and fermenting to obtain fermentation liquor; homogenizing the fermentation liquor to obtain homogenized liquor; mixing the homogenized liquid with compound enzyme, and performing enzymolysis to obtain enzymatic hydrolysate; and carrying out ultrafiltration concentration on the enzymatic hydrolysate, and drying to obtain the deer myocardial peptide. The micromolecular deer myocardial peptide prepared by the invention is high in purity and high in activity, and shows a good improvement effect in the aspects of replenishing qi and enriching blood, so that the application of the deer myocardial peptide is expanded.
Owner:HEBEI BAOSHIJIAN HEALTH TECH CO LTD

System and method for co-producing graphite carbon and hydrogen through two-stage pyrolysis of biomass

The invention discloses a system and a method for co-producing graphite carbon and hydrogen through biomass two-stage pyrolysis, and belongs to the technical field of biomass pyrolysis. The system comprises a low-temperature pyrolysis module and a continuous Joule thermal pyrolysis module. The Joule pyrolysis reactor is designed into a wheel disc type, so that biomass pyrolysis reactions can be linked into a whole, the reactions are continuously carried out, the starting and stopping time of a pyrolysis module is shortened, the economical efficiency of the whole system is improved, and graphite carbon and hydrogen are more efficiently obtained. By utilizing the system, firstly, biomass is subjected to low-temperature pyrolysis and condensation to obtain pyrolytic carbon and bio-oil, then the pyrolytic carbon is subjected to Joule thermal pyrolysis, condensation and purification to obtain graphite carbon, bio-oil and hydrogen-rich synthesis gas, the low-cost biomass is used as a raw material to prepare graphite carbon and hydrogen, and fossil resources used in traditional graphite carbon preparation are saved. The system can be better used for industrial production, and co-production of graphite carbon and hydrogen is achieved.
Owner:ENERGY RES INST OF SHANDONG ACAD OF SCI

Dust toxin detection system and method and safety helmet

The embodiment of the invention discloses a dust toxicity detection system and method and a safety helmet, the dust toxicity detection system comprises a detection device and a service platform, a particulate matter sensor of the detection device is used for collecting particulate matter concentration information, and a gas sensor of the detection device is used for collecting harmful gas concentration information; a data processing device of the detection equipment is used for determining a detection result of a target environment and performing alarm processing when the detection result indicates that the target environment is abnormal, and a communication device of the detection equipment is used for sending particulate matter concentration information and harmful gas concentration information to a service platform. And the service platform is used for determining a detection record according to the harmful gas concentration information and the particulate matter concentration information. Therefore, the gas sensor and the particulate matter sensor are integrated into the detection equipment, so that particulate matters and harmful gases in the target environment are detected at the same time, and the situation that the load of operators is increased due to the fact that multiple detection equipment is carried at the same time is also avoided.
Owner:NATIONAL INSTITUTE OF OCCUPATIONAL HEALTH & POISON CONTROL CHINESE CENTRE FOR DISEASE CONTROL & PREVENTION

Text processing method and device, electronic equipment and storage medium

The invention discloses a text processing method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining a first to-be-processed text; dividing the first to-be-processed text into a first text and a second text based on a preset condition; encoding the first text to obtain target encoded data of the first text; inputting the second text and the target coded data into a target model to obtain a second to-be-processed text; wherein the semantics of the second to-be-processed text is the same as that of the first to-be-processed text, and the character quantity of the second to-be-processed text is smaller than that of the first to-be-processed text; inputting the second to-be-processed text into a large language model to obtain a target result of natural language processing of the second to-be-processed text by the large language model; the target result is used for replying the first to-be-processed text.
Owner:LENOVO (BEIJING) LTD

Deep tunnel surrounding rock pressure arch range determination method based on energy density theory

The invention discloses a deep tunnel surrounding rock pressure arch range determination method based on an energy density theory. The method comprises the following steps: establishing a tunnel calculation model; setting an energy density calculation formula; setting a model excavation process and excavation unbalanced force precision; exporting a detailed. Dat file after calculation to Tecplot software, and visualizing energy density calculation results before and after excavation of the model tunnel; and determining a pressure arch range according to the inner and outer boundary curves. According to the method, the inner boundary and the outer boundary of the surrounding rock pressure arch are determined according to the energy density change disturbance range, the situation that pressure arch definition and boundary determination methods at the present stage depend on the magnitude and the direction of surrounding rock stress is avoided, and meanwhile the problem of judgment dispute of the deflection degree of a principal stress vector can be solved; by means of the method, the inner boundary range and the outer boundary range of the surrounding rock pressure arch can be rapidly and effectively obtained, and the evolution rule of the three-dimensional pressure arch along with tunnel excavation can be observed.
Owner:ZHEJIANG OCEAN UNIV +2

Biomarker for diagnosis of rheumatoid arthritis and application thereof

The invention relates to the technical field of biological medicine, in particular to a biomarker for diagnosis of rheumatoid arthritis and application of the biomarker. The biomarker for diagnosis of rheumatoid arthritis, disclosed by the invention, is a neuronal glial antigen 2, namely NG2. The inventor finds that the soluble NG2 (sNG2) level is significantly up-regulated in serum of a rheumatoid arthritis patient (RA), and is significantly positively correlated with RA joint disease activity (DAS28) score, joint dysfunction grading, rheumatoid factors (RF) and inflammatory factors TNF-alpha; the sNG2 level in RA serum is obviously reduced after treatment of adalimumab, prednisone and leflunomide; in addition, the expression of the NG2 level in RA peripheral blood macrophages is up-regulated. Therefore, by detecting the NG2 gene expression level in the macrophage in the blood of the rheumatoid arthritis patient and / or the sNG2 level in the serum, the kit can be used for diagnosis and treatment prognosis indexes of the rheumatoid arthritis, has good sensitivity and specificity, and provides a new strategy for clinical diagnosis of the rheumatoid arthritis.
Owner:ANHUI MEDICAL UNIV

Control method for approaching obstacle based on unmanned aerial vehicle in complex environment

The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to an unmanned aerial vehicle near obstacle control method based on a complex environment, and the method comprises the following steps: 1, obtaining a curve between obstacles through employing a binocular camera; 2, estimating the collision force of the obstacle according to the curve to obtain a {p, v} pair; 3, designing a gradient-based trajectory optimizer to extract information of an obstacle collided with the current trajectory; 4, numerical optimization is carried out; and 5, designing an MPC controller according to the obtained {p, v} pairs, and outputting an optimal control trajectory of the unmanned aerial vehicle near the obstacle based on the MPC controller. According to the invention, the obtained distance field information and height information are used to predict the performance of the unmanned aerial vehicle in a certain time period in the future so as to carry out optimization control, and the distance field, the height and the acceleration are constrained. And safe flight, very small overshoot, very small steady-state error and trajectory prediction of the unmanned aerial vehicle in near obstacle control are ensured.
Owner:CHINA TOWER CO LTD GUANGDONG BRANCH

Biomarker for knee osteoarthritis diagnosis and application thereof

The invention relates to the technical field of biological medicine, in particular to a biomarker for clinical diagnosis of knee osteoarthritis and application of the biomarker. The biomarker for diagnosing the knee osteoarthritis, disclosed by the invention, is a neuronal glial antigen 2, namely NG2. The inventor finds that the soluble NG2 (sNG2) level is remarkably increased in joint fluid of a knee osteoarthritis patient (OA) and is remarkably positively correlated with the minimum joint gap width of the OA and an inflammatory factor TNF-alpha; compared with a healthy control, the sNG2 level in OA serum is remarkably increased; in addition, the TNF-alpha promotes the expression up-regulation of NG2 in OA cartilage cells and the shedding generation of sNG2. Therefore, by detecting sNG2 in serum and synovial fluid of a patient with knee osteoarthritis, the kit can be used for diagnosing knee osteoarthritis, and a new strategy is provided for clinical diagnosis of knee osteoarthritis.
Owner:ANHUI MEDICAL UNIV

A multi-source coupled high-temperature steam heat pump

The present invention relates to a multi-source coupled high-temperature steam heat pump, comprising: a first heat exchanger and a second heat exchanger; an energy storage tank; a water circulation coil, each circle of the water circulation coil is provided with an opening, and all the openings are arranged longitudinally; a water circulation stroke adjustment device, comprising a longitudinal driving member, a connecting joint, and a connecting joint driving member, the connecting joint driving member drives the connecting joint to move toward one of the openings, the water outlet of the first heat exchanger, the upper water circulation coil, the connecting joint, and the water inlet of the first heat exchanger form a first water circulation, the water outlet of the second heat exchanger, the lower water circulation coil, the connecting joint, and the water inlet of the second heat exchanger form a second water circulation, and the longitudinal driving member drives and adjusts the number of circles of the upper water circulation coil and the lower water circulation coil; a flash tank, connected to the energy storage tank, for generating steam.
Owner:XIAMEN JINMING ENERGY SAVING TECH

Production method for oxidized cellulose and nanocellulose

InactiveEP4269448A4excellent fibrillatabilityThe process is stable and efficientCosmetic preparationsPulp properties modification
An object of the present invention is to stably and efficiently provide an oxidized cellulose having excellent fibrillatability. The above object can be achieved by a method of producing an oxidized cellulose, which contains an oxide of a cellulose raw material by a hypochlorous acid or a salt thereof, is substantially free of N-oxyl compounds, and has a degree of polymerization of 600 or less, the method including a step of obtaining an oxidized cellulose by oxidizing a cellulose raw material using a hypochlorous acid or a salt thereof, wherein viscosity of a slurry of the cellulose raw material having the same concentration as when the oxidation is performed is in a range of 1,000 Pa·s or less at 30°C or 40°C.
Owner:TOAGOSEI CO LTD

Method for presenting information cues for continuous monitoring equipment and continuous monitoring equipment

The invention relates to a method for presenting information prompts for continuous monitoring equipment and the continuous monitoring equipment. The method comprises the following steps: dynamically acquiring sensor data of a monitored object and calculating monitoring data of each monitoring index; if the monitoring data exceed the preset range of the monitoring indexes or the risk value of the monitoring data exceeding the preset range of the monitoring indexes is greater than the risk threshold value, determining that the risk value is greater than the risk threshold value; and matching a corresponding abnormal event for the monitoring data based on the degree that the monitoring data exceeds the preset range or the degree that the risk that the monitoring data exceeds the preset range is greater than a risk threshold, and dynamically presenting prompt information of the abnormal event in a display terminal according to a prompt mode matched with the abnormal event. According to the method provided by the invention, a more striking information prompting mode closely associated with the monitoring index can be provided, so that a user can timely and intuitively perceive the abnormal or risk condition of the monitoring index, and the best treatment opportunity is prevented from being missed.
Owner:SHENZHEN SAVORCARE MEDICAL TECHNOLOGY CO LTD

Method for inducing DC precursor cells in PBMC to differentiate into pDC cells in vitro and application

The invention provides a method for inducing DC precursor cells in PBMC (peripheral blood mononuclear cells) to differentiate into pDC cells in vitro, which comprises the following steps: the PBMC is placed in a culture medium for culture, and the culture medium comprises the following components: GM-CSF (granulocyte-macrophage colony-stimulating factor), Poly (I: C), Flt3l, TNF-alpha, ODN2006, Compound 4, autologous plasma and an AIM-V basal culture medium; replacing or supplementing the culture medium based on the culture progress until the preset culture time is reached; and collecting the cultured cells. According to the method, the PBMC serves as a culture object, the DC precursor cells in the PBMC are finally differentiated into the pDC cells through culture, the culture method is simple, a large number of pDC cells can be conveniently and efficiently obtained in vitro, and guarantee is provided for basic research and clinical application of the pDC cells. Meanwhile, the pDC cells obtained after the culture medium is used for culturing for 7 days can secrete IFN-alpha with a relatively high level under the condition of no target cell stimulation, so that the application of the culture medium in antiviral and anti-tumor treatment is facilitated.
Owner:深圳泽医细胞治疗集团有限公司

Biomarker for diagnosing and distinguishing rheumatoid arthritis and knee osteoarthritis and application of biomarker

The invention relates to the technical field of biological medicine, in particular to a biomarker for diagnosing and distinguishing rheumatoid arthritis and knee osteoarthritis and application of the biomarker. In order to solve the problems of insufficient sensitivity and specificity of rheumatoid arthritis (RA) and knee osteoarthritis (KOA) in clinical detection, the invention discloses a novel biomarker, namely a soluble interleukin 17 receptor D, namely sIL-17RD. The inventor finds that the sIL-17RD level is remarkably increased in serum of a patient with rheumatoid arthritis, the sIL-17RD level is not remarkably changed in serum of a patient with knee osteoarthritis, and the sIL-17RD level is remarkably increased in synovial fluid of the patient with knee osteoarthritis. Therefore, by measuring the sIL-17RD level in the serum sample of the rheumatoid arthritis patient and the sIL-17RD level in the synovial fluid and serum of the knee osteoarthritis patient, the rheumatoid arthritis and the knee osteoarthritis are diagnosed and distinguished, and a new strategy is provided for clinical diagnosis and distinguishing of the rheumatoid arthritis and the knee osteoarthritis.
Owner:ANHUI MEDICAL UNIV

Ester-based facaplysin derivative, preparation method and application of ester-based facaplysin derivative in antibacterial products

The invention discloses a method for rapidly and efficiently preparing a series of novel ester group facaplysin derivatives by combining EDCI and HOBT to react with carboxyl facaplysin and directly carrying out ester exchange reaction on an active ester intermediate and alcohol without separation. The invention also discloses application of the derivatives in resisting methicillin-resistant staphylococcus aureus and escherichia coli. The preparation method comprises the following steps that EDCI and HOBT are combined to activate carboxyl facaplysin for reaction, an activated ester intermediate is generated, the activated ester intermediate and alcohol are directly subjected to esterification reaction without separation, and a series of ester-based facaplysin derivatives are obtained. According to the preparation method, ester-based Fascaplysin derivatives with different structures can be rapidly and efficiently constructed, and compared with a traditional method that ester-based carboline derivatives are firstly synthesized and then high-temperature intramolecular cyclization is performed, the time and the raw material cost are greatly saved, the synthesis efficiency is improved, the reaction process is observable and controllable, and the yield is stable. And the synthesized ester group facaplysin derivative has excellent antibacterial activity on methicillin-resistant staphylococcus aureus and escherichia coli.
Owner:NINGBO UNIV

A reprogrammed responsive intelligent hydrogel material and its preparation method and application

The present invention relates to a reprogramming responsive intelligent hydrogel material and a preparation method and application thereof. The hydrogel material provided by the present invention uses alginate as a skeleton, and uses RGD series polypeptides and polyglutamic acid to modify the skeleton respectively. The iPS cell line obtained by using the hydrogel material provided by the present invention to mediate somatic cell reprogramming is similar to embryonic stem cells, showing high expression of pluripotency-related genes at the transcriptional level and translational level, strong positive staining of alkaline phosphatase, and demethylation patterns of promoter regions of endogenous pluripotency-related genes Oct4 and Nanog. The hydrogel material provided by the present invention can quickly and efficiently obtain individual-specific induced pluripotent stem cells, laying a foundation for the acquisition of individual-specific induced pluripotent stem cells and their wide application in the fields of regenerative medicine, disease simulation and drug screening.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA

Method and device for rapidly analyzing broadband RCS based on MLFACA and CBFM, and medium

The invention discloses a method, equipment and medium for rapidly analyzing broadband RCS based on MLFACA and CBFM, and the method only executes MLFACA and generates a feature basis function set CBFs at the highest frequency of a broadband to be analyzed, and does not need to repeat MLFACA and generate CBFs again at other frequencies in the broadband. The MLFACA decomposes an impedance sub-matrix of a far-field block pair into a product of several sparse matrixes based on fast adaptive cross sampling and a butterfly algorithm. In addition, the size of an outer matrix in product representation obtained by MLFACA is compressed by using CBFs, so that more efficient approximate representation is obtained. The approximate representation can be fixed in the whole frequency band, matrix elements can be efficiently obtained through an impedance interpolation method, it is avoided that a complete impedance matrix is generated through calculation at each frequency to be analyzed, and the filling efficiency of the impedance matrix of the far field block pair is effectively improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Stable isotope enrichment device and stable isotope enrichment method

The object of the present invention is to provide a stable isotope enrichment device and a stable isotope enrichment method capable of reducing the discharge amount of toxic or combustible substances or substances causing environmental load in the atmosphere and reducing the amount of raw materials used. The present invention provides a stable isotope enrichment device, including: a distillation column group in which a plurality of distillation columns are connected in a cascade; a raw material supply line (30) that supplies a raw material into a first distillation column (1); a product line (31) that withdraws a product from another distillation column located on the secondary side of the first distillation column (1); an isotope-depleted fluid withdraw line (32) that withdraws an isotope-depleted gas or an isotope-depleted liquid from the first distillation column (1) or another distillation column located on the primary side of the one distillation column (1); an isotope exchange reactor (22) at which the isotope-depleted gas or the isotope-depleted liquid is subjected to an isotope exchange reaction, the isotope-depleted gas or the isotope-depleted liquid is regenerated such that the concentration of molecules containing a target stable isotope in the isotope-depleted gas or the isotope-depleted liquid approaches the natural abundance ratio, and an isotope-regenerated gas or an isotope-regenerated liquid is produced; and an isotope-regenerated fluid return line (33) that re-supplies the isotope-regenerated gas or the isotope-regenerated liquid into the first distillation column (1).
Owner:NIPPON SANSO CORP

Method for preparing high-purity 2-methyl-6-acylnaphthalene and 2-methyl-7-acylnaphthalene through continuous catalytic reaction and rectification purification and application of high-purity 2-methyl-6-acylnaphthalene and 2-methyl-7-acylnaphthalene

The invention discloses a method for preparing high-purity 2-methyl-6-acylnaphthalene and 2-methyl-7-acylnaphthalene through continuous catalytic reaction and rectification purification and application of the high-purity 2-methyl-6-acylnaphthalene and the 2-methyl-7-acylnaphthalene. According to the method, high-purity 2, 6-and 2, 7-acyl naphthalene products can be obtained through fixed bed catalytic synthesis, rectification and crystallization purification, firstly, the molecular sieve catalyst is modified, the catalytic conversion rate and selectivity can be further improved, the formed catalyst is suitable for fixed bed acylation synthesis reaction, the catalyst activity in a catalytic system is high, and the catalytic efficiency is high. The used catalyst can be reused after regeneration treatment. The fixed bed catalytic reaction system, the product and the catalyst can realize solid-liquid separation without hydrolysis quenching, a large amount of acidic wastewater is not generated, the fixed bed catalytic reaction system is environment-friendly, in addition, unreacted 2-methylnaphthalene in a rectification system is recycled, a target object can be purified through rectification and crystallization, a high-purity product is obtained, and the fixed bed catalytic reaction system has a good application prospect.
Owner:CCTEG CHINA COAL RES INST

Video cover generation method and device, electronic equipment and computer readable medium

The invention relates to a video cover generation method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: reading a current video frame from a video file; performing face image detection on the current video frame, and setting a face image as a figure subject picture of a cover; recognizing face key points of the character main body picture, calculating the character main body picture of which the side face angle is smaller than an angle threshold value according to the face key points, and setting the character main body picture as a cover main body picture; identifying a text of the cover main body picture and a rectangular surrounding frame of the text, and setting the cover main body picture, in which the rectangular surrounding frame is not overlapped with the character main body picture, as a video cover picture; outputting the video cover picture as a cover picture of the video file; according to the technical scheme, intelligent judgment of the high-quality video frame can be realized, so that the available video cover picture is quickly output, and the efficiency of generating the video cover picture is greatly improved.
Owner:GUANGZHOU FANGGUI INFORMATION TECHNOLOGY CO LTD

Method for producing ovarian somatic cell-like cells, and method for inducing differentiation of primate pluripotent stem cells into ovarian somatic cell-like cells

A method for producing ovarian somatic cell-like cells includes a step 1 of culturing primate pluripotent stem cells in a medium including a GSK3 inhibitor and a ROCK inhibitor; a step 2 of culturing the cells from the step 1 in a medium including BMP4, retinoic acid, and an MEK inhibitor; and a step 3 of culturing the cells from the step 2 in a base medium to obtain ovarian somatic cell-like cells. A method for inducing the differentiation of primate pluripotent stem cells into ovarian somatic cell-like cells includes inducing the differentiation of primate pluripotent stem cells into ovarian somatic cell-like cells using the method for producing ovarian somatic cell-like cells.
Owner:KYOTO UNIV +1

Resin composition for phenol foam and foam

The resin composition for phenolic foams of the present invention includes (A) a resol-type phenolic resin, (B) an acid curing agent, (C) a blowing agent, (D) urea, and (E) an aliphatic epoxy compound. The resin composition for phenolic foams may further include (F) a solid phosphorus-based flame retardant, (G) a plasticizer, or the like. The aliphatic epoxy compound is preferably a compound having a glycidyl ether group at least one molecular terminal.
Owner:ASAHI YUKIZAI KOGYO CO LTD

Process for recovering calcium fluoride from calcium fluoride sludge

ActiveCN120483221BEfficiently obtainedgreen gained
The application belongs to the field of sludge recovery, and particularly relates to a method for recovering calcium fluoride from calcium fluoride sludge, wherein the calcium fluoride sludge is pretreated under ultrasonic waves, the power of the ultrasonic waves is above 20 KHz; a flotation reagent is added to the system after ultrasonic treatment for rough selection, and calcium fluoride rough selection material is collected; the flotation reagent comprises an inhibitor and a collector, the collector comprises formula 1 and formula 2 in a weight ratio of 1:1-2, the pH of the slurry in the flotation stage is 3-5.5; the acid for regulating the pH of the slurry is at least one of hydrochloric acid and nitric acid. The application innovatively adopts an ultrasonic process to pretreat the calcium fluoride sludge, and then cooperates with combined collectors in subsequent flotation and joint control of the pH of the flotation process, so that synergy can be achieved, and high-grade calcium fluoride can be efficiently and greenly obtained based on simple processes and means.
Owner:CENT SOUTH UNIV

Attack path analysis method, system and medium based on risk association

The present invention discloses an attack path analysis method, system and medium based on risk association, the method comprising: obtaining basic information from a vulnerability knowledge base according to a description of a system to be tested input by a user, the basic information including vulnerability vectors, attack condition vectors and network configuration vectors; identifying asset entities from the system to be tested according to the basic information; deploying an entity probe identification agent program at the gateway of each device in the system to be tested, deploying an entity probe program on a core network switching node, scanning and detecting asset entities existing in the system to be tested, and obtaining identification information; analyzing risk status information of the system to be tested based on an attack model according to the identification information; generating attack paths and forming a threat tree according to the risk status information and combining the correlation between asset risks. The present invention has high risk identification efficiency, comprehensive information collection, clear risk relationships and accurate risk analysis results.
Owner:STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST

Rail detection method and apparatus, electronic device, and storage medium

This invention relates to the field of intelligent rail transit technology, providing a track detection method, apparatus, electronic device, and storage medium. The track detection method includes: obtaining target image data representing a track region from image data acquired by a camera; obtaining target point cloud data representing the track region from point cloud data acquired by a lidar based on the camera parameter matrix and the target image data; extracting a transformation matrix from the lidar coordinate system to the track plane coordinate system based on the target point cloud data; obtaining target track data generated by projecting the target image data onto the track plane based on the camera parameter matrix and the transformation matrix; and fitting a target track equation based on the target track data. This invention's track detection scheme combines the sensing capabilities of lidar with the motion-distortion-free and pixel-dense characteristics of camera imaging, improving track detection accuracy, increasing track detection distance, and efficiently and accurately obtaining track detection results.
Owner:SHANGHAI WESTWELL INFORMATION & TECH CO LTD

A high-precision static pressure thrust sliding bearing simulation and optimization design method

This invention relates to the field of sliding bearing simulation and optimization technology, and more specifically to a high-precision simulation and optimization design method for hydrostatic thrust sliding bearings. It establishes an efficient decoupling model of the fluid-solid-thermal three-physics field of the hydrostatic thrust sliding bearing, decomposing the overall thermodynamic field into two subfields, which are coupled with the fluid force field and the solid force field, respectively. Then, it constructs a gap oil film flow / thermal field model and a friction pair deformation solid / thermal field model, achieving equivalent coupling through data transfer. The oil film control equations are iteratively solved to obtain oil film pressure, temperature, and flow velocity; the friction pair equations, including elastic constitutive and thermal strain equations, are solved to obtain their elastic and thermal deformations, with bidirectional data transfer achieving coupled iteration. Based on the above method, simulations are performed, establishing sub-models of oil film flow and friction pair deformation, using local interpolation and dynamic meshing to process the interface; the oil cavity is optimized based on the simulation results, parametric analysis is used to establish the mapping between structural parameters and lubrication performance, the objective function and constraints are defined, and the optimal oil cavity structure is obtained through algorithms.
Owner:YANQIHU BASIC MFG TECH RES INST (BEIJING) CO LTD +2