450results about How to "Clear structure" patented technology

The invention discloses a harmonic oscillation suppression method and system for a hydrogen energy grid-connected converter. A corresponding remolding transfer function Gig (s) is added in a forward channel of a d-axis current controller; constructing a power transmission relation between an alternating current system and a direct current system based on the direct current side small signal model and the alternating current side power small signal model of the hydrogen energy inverter; inputting a small signal transfer function model of a voltage outer loop and a current inner loop obtained by controlling the hydrogen energy grid-connected inverter into a power transmission relation of an alternating current system and a direct current system to obtain a small signal control model of the hydrogen energy grid-connected inverter in a dq coordinate system; and determining an equivalent output admittance model of the hydrogen energy inverter based on the remolded transfer function Gig (s) and the small signal control model, obtaining a minimum return rate matrix representing the stability of the hydrogen energy grid-connected inverter through the power grid impedance and the output admittance of the hydrogen energy inverter, and determining the stability of the grid-connected converter system based on the characteristic value of the minimum return rate matrix. And suppression of harmonic oscillation is realized.

The invention discloses a rare-earth metal arylamine group compound as well as preparation method and application thereof. The invention discloses the rare-earth metal arylamine group compound which is characterized in that a general formula of the rare-earth metal arylamine group compound is (2,6-R12PhNH)5LnLi2(THF)2, wherein Ln is a rear-earth metal selected from one of neodymium, samarium, ytterbium or yttrium; R1 is selected from one of hydrogen, methyl or isopropyl. The rare-earth metal arylamine group compound has the advantages that the rare-earth metal arylamine group compound has a definite structure; raw materials used in the preparation method are simple, easily obtained and cheap; the reaction process is simple and easily operated; the rare-earth metal arylamine group compound product is conveniently purified and the yield of the product is high; the rare-earth metal arylamine group compound has a high activity when acting as a single component catalyst to catalyze a hydrogen phosphine reaction of aldehyde or ketone and phosphite ester; the use amount of the catalyst is less; the yield is high; a substrate has wide universality; a new and simple method is provided for synthesis of a-hydroxyphosphonate.

The present application belongs to the field of biomedicine technology, and specifically relates to a chondroitin sulfate oligosaccharide derivative and a preparation method and application thereof. The structure of the chondroitin sulfate oligosaccharide derivative is shown in Formula I, #imgabs0#Formula I, where R1 is SO3H, R2 is H or R1 is H, R2 is SO3H, and the polymerization degree of the chondroitin sulfate oligosaccharide derivative is equal to 8; the chondroitin sulfate oligosaccharide derivative has good promotion of chronic hepatitis repair and anti-inflammatory activity, and has a clear structure, and can be used for oral treatment of non-alcoholic fatty liver disease.

The invention belongs to the technical field of network security, and particularly relates to a product object attribute change identification method, system and device, and a medium, the method comprises the following steps: pre-defining a user-defined annotation for marking a field needing to be verified; after the information of any product object is edited again, all edited first fields are obtained from the front end through a reflection mechanism, and all corresponding second fields are called from a database at the rear end; wherein the fields with the same attribute in the first field and the second field have the same annotation information; and for any first field, acquiring a field name corresponding to the first field by utilizing a reflection mechanism, indexing corresponding field values from all the second fields according to the field name, and identifying whether the fields of the product object are changed or not by checking the first field and the field values.

The invention discloses an amino-bridged triaryloxy rare earth metal complex and a preparation method and application thereof, the amino-bridged triaryloxy rare earth metal complex is prepared by reaction of a tricyclopentadienyl rare earth compound and amino-bridged triphenol, and the preparation method is simple to operate, convenient to separate and purify, low in raw material cost and mild in reaction condition. The amino-bridged triaryloxy rare earth metal complex provided by the invention can be used for catalytic oxidation of chalcone compounds and cycloaddition reaction of carbon dioxide, the reaction conditions are relatively mild, the universality of reaction substrates is wide, the reaction time is short, the yield of target products is high, and the reaction operation process is simple.

The invention discloses a method for realizing direct connection to a futures transaction counter based on an Electron framework, which comprises the following steps of: compiling C + + APIs (Application Program Interface) of different futures transaction counters into a node.js plug-in based on a node-add-api plug-in, creating a transaction data communication thread in a host process of the Electron framework to call the node.js plug-in, loading a front-end interface based on vue in a window of the Electron framework to complete creation of a client interface, and directly connecting the client interface with the client interface. An installation package of the Windows system is generated by configuring nsis; the problems of high development difficulty, long period, imperfect ecological resources, poor reusability and the like are solved.

The invention discloses a method for preparing multi-branch oligosaccharide. According to the method, an in-vitro enzymatic synthesis strategy is adopted, monosaccharide activation and glycosyl transferase catalytic reaction are coupled, operation is simple and safe, the reaction conversion rate and the product yield are greatly improved, and a foundation is laid for industrial production of multi-branched oligosaccharides, especially multi-branched human milk oligosaccharides. According to the invention, synthesis of human milk oligosaccharides with three-branch, four-branch and other multi-branch structures can be realized, and reference is provided for synthesis of oligosaccharides and glycoconjugates with more complex structures.

The invention relates to the technical field of lubricating oil analysis, in particular to a method and system for quantitative analysis of a lubricating oil additive. The method comprises the following steps: acquiring base oil data and lubricating oil additive data; performing mixed oil treatment based on the base oil data and the lubricating oil additive data to generate mixed lubricating oil additive data; performing mixed oil concentration detection on the mixed lubricating oil additive data to generate mixed oil concentration detection data; performing chromatographic column selection on the mixed lubricating oil additive data based on the mixed oil concentration detection data to generate chromatographic column selection data; and performing boiling point heating on the chromatographic column selection data to obtain mixed oil boiling point heating data. By optimizing data acquisition, chromatographic separation, component identification and quantitative analysis as well as result analysis and visualization, the accuracy of quantitative analysis of the lubricating oil additive is improved.

A spiral pruning method for crisp and honey kumquats is characterized in that when fruit-bearing branches are hung, branch hanging is carried out step by step from top to bottom in a layered mode, two vertically-adjacent layers of fruit-bearing branches are staggered to form a multi-layer three-dimensional tree crown structure, and after branch hanging work is completed, the whole shape of the hung branches is in a spiral rising shape. Comprising the following steps: (1) erecting a supporting rod; (2) trunk selection and culture; (3) main branch selection and arrangement; (4) selecting, remaining and pruning side branches; (5) branch hanging and the like. According to the spiral pruning method for the crisp and honey kumquats, the layout mode remarkably improves the ventilation and light transmission conditions of tree crowns, the photosynthesis efficiency is improved, and uniform distribution and maturity of fruits are promoted.

The invention discloses a cationic polyester, comprising a copolymer of monomer C, monomer S and monomer M, wherein the copolymer terminal group is modified with a group E; the monomer C comprises cholesterol; the monomer S comprises an organic acid having at least two carboxyl groups at the terminal group; the monomer M comprises a compound containing two hydroxyls and at least one secondary amine or tertiary amine; and the compound modified with the group E comprises at least one primary amine, secondary amine or tertiary amine group. The in vitro cell-level mRNA delivery efficiency of the cationic polyester of the invention is significantly better than that of the existing commonly used commercial gene transfection reagents, and the cytotoxicity is lower; the cationic polyester is soluble in ethanol, and is easy to be industrialized and clinically applied in preparations, and therefore has great practical application prospects.

The invention relates to the technical field of preparation of catalysts, and particularly discloses a preparation method and application of a nitrogen-doped porous carbon supported metal catalyst. Tetra (4-pyridyl) porphyrin, a tetra (4-pyridyl) porphyrin M (Ru, Ir or Pd) complex and polybrominated methyl benzene are evenly mixed according to a certain proportion, and then the mixture is added into a nitrogen-doped porous carbon supported metal catalyst. Heating and polymerizing at 70-150 DEG C to form a porous ionic polymer; after the obtained porous ionic polymer adsorbs a certain amount of saturated urea solution, performing vacuum drying to obtain a porous ionic polymer / urea solid mixture; and heating the obtained porous ionic polymer / urea solid mixture to 550-1000 DEG C under the protection of inert gas for pyrolysis to obtain the nitrogen-doped porous carbon supported metal catalyst. The nitrogen-doped porous carbon supported metal catalyst has the advantages of large specific surface area, adjustable metal loading capacity and metal atom spacing, clear active center structure and the like, and shows excellent catalytic performance and recycling performance in catalysis of N-formylation reaction of amine and CO2.

The invention discloses a target code generation method based on a template engine. The method comprises the following steps: presetting a template file corresponding to an item; loading a template file through a template engine, wherein the template file is generated according to the repetitive code of the project; combining the data model corresponding to the project with the template file to generate a target code; the template file comprises a mark used for indicating the template engine to insert dynamic data in the repetitive code, and the data model comprises the dynamic data required by the template file. Through the preset template file, the workload of repeatedly writing codes is reduced, and the development efficiency is improved.

The utility model discloses a snow falling prevention device suitable for a bridge totally-enclosed sound barrier, which comprises steel stand columns and a steel camber beam, the lower surface of the steel camber beam is symmetrically and fixedly connected with the steel stand columns, the steel camber beam and the steel stand columns form the complete totally-enclosed sound barrier, the upper surface of the steel camber beam is symmetrically and fixedly connected with steel support base plates, and the steel support base plates are fixedly connected with the steel support base plates. The upper surface of the steel support bottom plate is fixedly connected with a square steel pipe in an inner cavity of the steel support vertical plate, and the outer wall of the square steel pipe is fixedly connected with a baffle. Through physical blocking, accumulated snow is effectively prevented from sliding from the sound barrier, the traffic accident risk caused by accumulated snow sliding is greatly reduced, and therefore the safety of road traffic is guaranteed, the structure is stable, durability is high, if the device is made of high-strength and corrosion-resistant materials, it can be better guaranteed that the device can be kept stable under various severe weather conditions, and the service life of the device is prolonged. In addition, the structural design is also elaborately optimized, so that it is ensured that the device can still keep stable when bearing accumulated snow pressure and wind and snow impact.

The invention discloses a multichannel power supply switching electric quantity acquisition system, which belongs to the technical field of standby power supply switching and comprises a storage battery, a mains supply end, a first intelligent switcher and a second intelligent switcher. The device further comprises a solar panel, the output end of the solar panel is electrically connected with a solar controller, the solar controller is electrically connected to the first input end of the first intelligent switcher, and the output end of the first intelligent switcher is electrically connected to the storage battery. The output end of the storage battery is electrically connected to the first input end of the second intelligent switcher, and the output end of the second intelligent switcher is electrically connected to the terminal through the main control board; the first output end of the mains supply end is electrically connected to the second input end of the second intelligent switcher through an inverter. The system has the advantage of seamlessly switching the commercial power and the storage battery.

The invention discloses a preparation method and application of a diatomic catalyst based on a covalent organic framework, the prepared diatomic catalyst based on the covalent organic framework has a clear structure, the bimetal active center distance is clear and adjustable, and research on the synergistic effect of the diatomic catalyst is facilitated. The invention also provides an excellent catalyst for electrochemical preparation of hydrogen peroxide, and the catalyst has the advantages of stable structure, high specific surface area, high repeatability, simple preparation, and hydrogen peroxide selectivity of more than 90%.

The invention discloses an image fusion method based on a double-branch feature decoupling auto-encoder, and belongs to the field of computer vision and image processing. According to the method, for the problems of modal pollution and structural distortion in infrared and visible light image fusion, structural semantic information and high-frequency texture details of a source image are extracted respectively by constructing a content feature coding module and a detail feature coding module, and feature decoupling is achieved. And performing deep fusion on the decoupled features by using an adaptive feature weighting mechanism, and reconstructing a fused image with infrared target saliency and visible light detail definition through a shared decoder. According to the method, an end-to-end two-stage training strategy is adopted for optimization, complex prior or post-processing is not needed, the effects of improving the fused image contrast, edge preservation and target recognition performance are remarkable, and the method is suitable for the fields of weak light monitoring, intelligent perception, unmanned system navigation and the like.

The invention relates to a fluorescent microscopic image enhancement method and device based on multi-saliency guide filtering fusion and a storage medium. The method comprises the following steps: inputting a single-layer fuzzy pathological image I; performing correction algorithm on the single-layer fuzzy pathological imaging to obtain a pseudo exposure image sequence; respectively calculating saturation S in three channels for each pixel through a spatial linear saturation adjustment algorithm, carrying out normalization processing on saturation increment to obtain a saturation-adjusted pseudo-exposure image, and carrying out two-scale decomposition through mean filtering to obtain a base layer sequence and a detail layer sequence; the base layer sequence obtains a base layer fusion result through an energy significance guide filtering algorithm, and the detail layer sequence obtains a detail layer fusion result through a Gaussian significance guide filtering algorithm; and performing two-scale reconstruction on the base layer fusion result and the detail layer fusion result to obtain a single-layer deblurring pathological image. According to the method, the color fidelity of the sample can be improved, and the cell texture structure is clearer while noise interference is eliminated.

The invention discloses an electric power communication network system, which comprises an optical transmission network unit, a security access network unit, a 5G backup communication unit, a communication network management platform and a network security unit, the communication network management platform manages optical signal or electric signal transmission of the optical transmission network unit, the optical transmission network unit is in signal connection with the security access network unit, and the optical signal or the electric signal is transmitted to the user terminal through the security access network unit; the 5G backup communication unit is in signal connection with the optical transmission network unit to realize the reliability of network communication; and the network security unit is in signal connection with the security access network unit to realize the security of the security access network unit and the 5G backup communication unit. Wherein the security access network unit comprises a full-line optical network, the full-line optical network comprises an optical line terminal, an optical distribution network and an optical network unit at a user side which are in signal communication in sequence, and the other end of the optical line terminal is in signal connection with the optical transmission network unit.

The invention relates to the technical field of batteries, and discloses a power battery system and a control method. The system comprises a plurality of power battery branches which are connected in parallel and are used for monitoring and sending key data; the high-voltage boxes are connected with the power battery branches in a one-to-one correspondence manner; the whole vehicle confluence cabinet is connected with all the high-voltage boxes and is used for generating a control instruction according to the key data; wherein the high-voltage box is used for forwarding all key data to the whole vehicle confluence cabinet and forwarding control instructions to the power battery branches so as to control the power battery branches to supply power to the whole vehicle load. According to the scheme, the problem that the whole vehicle loses high-voltage power supply and cannot run normally due to the fact that the fault battery pack cannot be independently controlled and isolated in the fault process of the power battery system is solved, the fire control logic is perfected, and the operation efficiency and reliability of the vehicle are improved.

A DAS seismic noise suppression method based on a multi-scale feature fusion network belongs to the technical field of machine learning and seismic image processing, and aims to solve the problem of non-uniform noise distribution in seismic data, a multi-scale feature interaction module formed by instance normalization is introduced, features of adjacent scales are used as module input, and a multi-scale feature fusion network is constructed; context semantic information contained in the low-scale features and detail information contained in the current-scale features are used for complementation, and therefore self-adaptive processing is carried out on noise which is not evenly distributed. In order to solve the problem that noise is not stable, a self-adaptive feature fusion module is introduced, useful features are dynamically selected from each scale, the capability of removing complex noise can be enhanced, weak reflection signals can be recovered, self-adaptive fusion of multi-scale features is achieved, and meanwhile correlation between different scales can be enhanced. According to the method, complex noise in DAS seismic data can be effectively suppressed, and the structure and continuity of effective signals can be well recovered.

The invention discloses a liquid helium ultralow-temperature impact system based on vacuum and a use method thereof, and belongs to the technical field of liquid helium ultralow-temperature impact mechanical property testing equipment, and the liquid helium ultralow-temperature impact system based on vacuum comprises an ultralow-temperature vacuum experiment cavity, a vacuum unit, a liquid helium supply device, an impact device and a strain acquisition device. The device is clear in structure and simple in principle; liquid helium is adopted for refrigeration, so that the temperature in the experiment cavity can reach an ultralow temperature environment, and the device can be used for impact loading mechanical property testing of different samples in a complex stress state in the ultralow temperature environment.

The utility model discloses an angle magnification optical diffraction experiment device. Comprising a one-dimensional optical slide rail, and a helium-neon laser, a one-dimensional arrangement lens group and a receiving measurement assembly which are sequentially arranged at intervals along an optical axis from an object side to an image side, and samples used for diffraction experiments are arranged among lenses in the one-dimensional arrangement lens group along the optical axis direction. The one-dimensional arrangement lens group, the receiving and measuring assembly and the sample are slidably mounted on the one-dimensional optical slide rail; and the helium-neon laser and the one-dimensional optical slide rail are both arranged on the top surface of the optical platform. According to the utility model, through the beam expanding light path and the angle amplification light path which are formed by the lens group, the diameter of the laser beam and the diffraction angle are respectively enlarged, so that diffraction spots of a macroscopic object are clearly visible on a naked eye resolution scale, the device can be used for displaying diffraction and interference phenomena of various large-size structures, and the whole set of device is simple, compact and convenient to use. The device is clear in structure, has high flexibility, and can be widely applied to physical optical experiment teaching.

The invention relates to the technical field of time-triggered network communication, in particular to a time-triggered Ethernet scheduling generation and synchronization system based on a hardware time axis construction engine. According to the system, a time axis structure consistent with global synchronization time is constructed on a switch side through hardware, sending time and a sending sequence of a time trigger frame configured by a user are directly mapped into a resource occupation relation on a time axis, and scheduling window mapping, conflict detection and window shaping are completed on a hardware level; therefore, a deterministic scheduling table is generated; through a double-table storage and time alignment switching mechanism, undisturbed updating and synchronous effectiveness of the dispatch table between the switch and the end system are realized. Compared with a traditional scheme of generating a scheduling table depending on a software algorithm, the method does not need a complex scheduling solution process, supports manual controllable configuration of time-triggered frame scheduling, and improves the certainty, autonomy and engineering realizability of the system.

The vinasse drying device comprises a box body, a feeding port, a hot air pipe, a first-stage drying assembly, a second-stage drying assembly, a third-stage drying assembly and a plurality of supporting rods, the multiple supporting rods are connected to the bottom of the box body, and one side of the interior of the box body is evenly divided into three horizontal cavities; the other side of the interior of the box body is provided with a vertically downward through material channel, the material channel is located at the bottom end of the feeding port, the feeding port is communicated with the top end of the box body, the side, close to the material channel, of the cavity is connected with a movable door, the bottom end of the movable door is connected with an output shaft of a micro motor, and the micro motor is connected to the outside of the box body. The first-stage drying assembly is connected into the top cavity, the second-stage drying assembly is connected into the middle cavity, the third-stage drying assembly is connected into the bottom cavity, the hot air pipe is connected to one side of the box body, and a circulating assembly for communicating the three cavities and conveying hot air is arranged in the hot air pipe.

The application provides a wind tunnel pressure regulating valve opening set fault diagnosis method based on a composite criterion, relates to the technical field of equipment fault diagnosis, and comprises the following steps: training a fault diagnosis model by using seen fault sample, extracting sample features by using an encoder, and obtaining classification information and reconstruction information of the sample by using a classifier and a decoder; then, according to the output result of the model on training data, a composite criterion is constructed in a feature space, a probability space and a sample space, and is used for identifying unknown faults; finally, when a new fault sample is input, the composite criterion is used to judge the sample, accurate diagnosis of known faults and effective identification of unknown faults are realized. The composite criterion method has a clear structure, a simple implementation process, can be extended on the basis of an existing fault diagnosis model, and has good engineering application value.

The invention relates to the technical field of smart tourism, in particular to a personalized scenic spot content generation method, system and device based on a multi-modal knowledge graph and a medium, and the method comprises the steps: collecting multi-modal data of a scenic spot, and constructing a structured multi-modal scenic spot knowledge graph based on the multi-modal data; obtaining personalized data provided by the tourist, and constructing a personalized portrait of the tourist based on the personalized data; in response to an operation of acquiring an image in a scenic spot, identifying the scenery in the image, and extracting a corresponding initial knowledge subset from the multi-modal scenic spot knowledge graph according to an identification result; performing personalized screening and expansion on the knowledge nodes in the initial knowledge subset by calculating the matching degree between the knowledge nodes in the initial knowledge subset and the tourist interest in the personalized portrait of the tourist, and dynamically binding multi-modal resources to generate a personalized knowledge graph; and presenting the personalized knowledge graph. According to the invention, the multi-mode scenic spot knowledge experience of which the structure is matched with the interest and the knowledge background can be provided for tourists.

The utility model discloses a total-factor surgery simulation visual suturing and knotting practice platform. The device comprises an operation table and a control table which highly simulate human tissues, the operating table comprises a simulated human tissue suturing model of which the two sides of an incision are respectively provided with a resistance strain sensor, a simulated blood vessel suturing and knotting model arranged in a blood vessel layer, and a blood pumping device communicated with the simulated human tissue suturing model through a catheter; the blood pumping device simulates the flow velocity and pressure of blood flowing in the liquid supplementing tank centrifugal pump and the simulated blood vessel suture knotting model through a liquid guide pipe; annular pressure sensors for detecting the tension of the blood vessel walls on the two sides during suturing are mounted in interlayers of the inner wall and the outer wall on the two sides of the incision of the sutured blood vessel in an embedded manner, and first annular resistance strain sensors for reflecting the knotting pressure of the blood vessel are mounted on the inner wall of the incision of the sutured blood vessel; a second annular resistance strain type sensor used for detecting the blood vessel ligation pressure value is arranged in an interlayer of the inner wall and the outer wall of the ligation blood vessel.

This application relates to the field of organosilicon polymer materials, specifically disclosing a method for preparing and applying a functionalized MQ silicone resin. A method for preparing a functionalized MQ silicone resin includes the following steps: (1) raw material pretreatment; (2) simultaneous addition reaction: mixing and reacting a hydrogen-containing MQ silicone resin, a terminal olefin monomer containing a benzocyclobutene functional group, and a terminal olefin monomer containing a C-F bond; (3) post-treatment to obtain the functionalized MQ silicone resin; wherein the molar ratio of Si-H bonds in the hydrogen-containing MQ silicone resin, C=C bonds in the terminal olefin monomer containing a benzocyclobutene functional group, and C=C bonds in the terminal olefin monomer containing a C-F bond is 1:(0.2-0.6):(0.1-0.4). This application enables the synergistic effect of the rigid benzocyclobutene group and the fluorinated flexible segment, one-step grafting, and structural controllability, ultimately preparing a functionalized MQ silicone resin with excellent dielectric properties, high temperature resistance, low-temperature flexibility, good hydrophobicity, and excellent mechanical strength.

The invention discloses an integrated intelligent monitoring system and a hierarchical isolation method and equipment based on a security domain, and relates to the technical field of industrial automation system integration, the method comprises a centralized data bus, a modular function service and a service interface, the centralized data bus is used for receiving original real-time data acquired from bottom equipment; the modularized function service is used for designing each function service of the discrete manufacturing workshop into a mutually independent and pluggable module form, and each function service subscribes to required data from the centralized data bus; and the service interface is used for publishing the generated new service data back to the centralized data bus after the function service consumes the subscription data, so that other function services can subscribe and consume. According to the invention, the problems of architecture chaos, data islands and security risks in multi-subsystem integration can be effectively solved.

The application discloses a kind of relative radiation calibration methods and systems of remote sensing image based on quantile, it is related to remote sensing image processing technical field, the method includes: collecting satellite historical image data and separating according to spectral band;The value of each column of single-band image detector is sequentially arranged in ascending order, and quantile value is uniformly extracted to generate the quantile feature sequence of each column;The arithmetic mean value of all columns under the same quantile level is calculated, and the global reference quantile distribution is constructed;Based on least square method, the linear mapping relationship between each column quantile sequence and reference distribution is constructed, and the radiation correction gain and bias coefficient of each detector column are obtained;The original image is corrected column by column using the coefficient;The present application effectively eliminates the vertical strip noise caused by the non-uniformity of sensor response, overcomes the limitations of traditional calibration under the meteorological conditions and platform maneuvering, significantly improves the timeliness and image radiation quality of high-frequency and high-precision calibration.