57results about How to "Good application value" patented technology

The disclosed IPTV set-top box (STB) multicast/unicast seamless switch method based on RTP protocol comprises: to switch multicast into unicast, receiving multicast data to decode and display, stopping the decoding when receiving switch command, deciding whether the last data frame integrated, yes to send request for leaving multicast, or else continuing to receive data package; after leaving multicast, requesting unicast uniform resource locator, recovering decoder; requesting unicast data, deciding the time stamp of received data to abandon the data if the stamp not less than the last stamp during multicast process or else send data into decoder to display.

A single-event reinforced FPGA configuration circuit with the code stream error detection and error correction function comprises a bus interface circuit, a configuration bus, configuration registers, a coding error correction circuit and a configuration memory array.The bus interface circuit analyzes a configuration bit code stream to obtain configuration register addresses and internal data and transmits the configuration register addresses and the internal data to the corresponding configuration registers through the configuration bus, the configuration registers carry out read-write, configuration and error correction operation according to internal instruction words, the coding error correction circuit generates check codes after receiving configuration data words, transmits the check codes to the configuration memory array, reads the configuration data words and the check codes and carries out error correction, and the configuration memory array loads the configuration data words and the corresponding check codes.According to the single-event reinforced FPGA configuration circuit with the code stream error detection and error correction function, by additionally arranging the coding error correction circuit, the configuration data words in the configuration memory array can be read after configuration is finished for error detection and error correction, the problem that a logical error is likely to be introduced in an SRAM type FPGA chip in a space radiation environment due to single-event upset is solved, and the application value is high.

The technical problem solved by the invention is to provide a combined pneumatic flexible finger. The silicone finger block is formed by vacuum casting in the mould, and the branch trachea, the connecting trachea and the silicone finger block are bonded with liquid silicone to form the silicone finger segment. Freely combine the silicone finger segments, adjust the installation angle, assemble them, and tie them tightly with cable ties. Selectively block the branch trachea or connecting trachea of ​​each silicone finger section, and pass compressed gas through the corresponding branch trachea or connecting trachea, which can freely control the deformation and bending of each silicone finger section to complete various actions. The present invention can meet various use conditions and requirements to the greatest extent, and its software features are especially suitable for objects such as brittle objects that are not suitable for use by traditional manipulators.

The invention discloses a method for rapid determination of oil content in Camellia oleifera seeds by using NIRS. According to the invention, a high-quality Camellia oleifera seed variety is selected from over 130 Camellia oleifera seed varieties, and the selected Camellia oleifera seed variety contains 70% to 80% of tea oil oleic acid, 7% to 12% of linoleic acid, 7% to 11% of palmitic acid and 1% to 3% of stearic acid; chemical values of oil content in selected Camellia oleifera seeds are analyzed, and a precise analysis model is established by combining the chemical values with NIRS; combined pretreatment methods of first derivative, SG (Savitzky-Golay filter) and MSC (multiplicative signal correction) produce a best effect, optimal wave bands are 4200.20 to 4088.35/cm and 4666.89-4639.89.89/cm, and an optimal regression method is the method of partial least squares; oil content in Camellia oleifera seed samples to be determined can be obtained by analyzing near-infrared spectrogram of the Camellia oleifera seed samples to be determined by using an established correction model, and a correlation coefficient between analytical values and predicted values can reach 0.8978. The method provided in the invention can be used for rapid and accurate determination of oil content in unknown Camellia oleifera seeds and has a good application value in high-quality breeding and quality analysis of Camellia oleifera.

The invention relates to a PZT/PVDF composite material flexible medium microstrip antenna, pertaining to the field of wireless communication technology. The microstrip antenna comprises a PZT/PVDF composite material medium substrate, which is characterized in that the microstrip antenna comprises a medium substrate, and a circular polarization microstrip antenna structure with the frequency of 5.8GHz and a feeder apparatus are constructed on the medium substrate. Because the PZT/PVDF composite material used is a flexible medium with high dielectric constant and low power consumption, the circular polarization microstrip antenna structure with the frequency of 5.8GHz is constructed on the PZT/PVDF composite material, the upper surface is in the shape of copper-coated microstrip antenna, the lower surface is the metal ground, and the microstrip antenna feeds through the edge of coaxial joints. The invention is characterized in small size and flexible installation, particularly being suitable for miniature wireless radio frequency communication system.

The invention relates to a preservation refrigerator and a matched oxygen concentration regulating device. The light oxygen reduction preservation refrigerator comprises a refrigerating chamber, an extraction port and an air injection port, the extraction port and the air injection port are communicated with the oxygen concentration regulating device by a corresponding extraction pipeline and an air injection pipeline, a main body of the device is an oxygen concentration regulator with the light response mode, the extraction pipeline is communicated with an air inlet of the oxygen concentration regulator, the air injection pipeline is communicated with an air outlet of the oxygen concentration regulator, electromagnetic valves are both connected on the extraction and the air injection pipelines in series, an air pump is connected on the pipeline of the extraction pipeline or the air injection pipeline within the electromagnetic valve in series, the oxygen concentration regulator, the electromagnetic valves and the air pump are connected with a control circuit. The mode utilizes the characteristics of oxygen absorption and oxygen release of the light response material under the radiation of the ultraviolet with the different wavelengths, the control is convenient, the regulation of the oxygen concentration and the oxygen reduction preservation refrigerator can be further realized by being matched with a simple control element.

The invention relates to a method and system for generating a boxing scheme of articles in a logistics warehouse, and the method is characterized in that the method comprises the following steps: 1) obtaining the three-dimensional size data of all types of boxes and all articles in an order; 2) adopting a heuristic search algorithm and a genetic algorithm, according to the three-dimensional size data of all types of boxes and all articles in the order and set proficiency degree parameters, for a specific box selection scheme, searching to obtain the minimum height of the box required for loading all articles in the order under each box selection scheme and all boxing schemes meeting the minimum height of the box; and 3) searching to obtain an optimal boxing scheme required by the order according to the minimum height of the box under each box selection scheme and all boxing schemes thereof, and preset starting conditions and cut-off conditions, so that the method can be widely appliedto the fields of space planning technologies and application systems.

The invention relates to a Beidou short message emergency communication base station and a communication method thereof. The base station comprises a Beidou short message module, a GSM/GPRS module, a Beidou navigation positioning module and a wireless communication module, the Beidou short message module and the GSM/GPRS module are connected with a processor module via a first channel selection module, and the processor module is connected with the Beidou navigation positioning module and the wireless communication unit. Via a bidirectional short message communication capability provided by the Beidou system, the Beidou short message emergency communication base station can serve as both an emergency communication base station to provide multiple different type of short-distance wireless communication node access service modes and an independent communication terminal to expand the application range of devices.

A five-level converting device includes a first switch module, a second switch module and a third switch modules each connects to a neutral point, a positive terminal and a negative terminal of a bus capacitor module. A first switch module includes a plurality of bidirectional switching circuits cascaded to each other, and each bidirectional switching circuit includes two first switching units reversely connected in series. Second switch module includes a plurality of second switching units connected in series. Third switch module includes a plurality of third switching units connected in series. A first flying capacitor unit is connected across the first switching module and a second switch module, and a second flying capacitor unit is connected across the first switching module and a third switching module. The first flying capacitor unit and the second flying capacitor unit are connected to different connection points between the first switch units respectively.

The invention belongs to the technical field of motors, and particularly relates to a method for prolonging the service life of a motor. A sealing bearing adopted in the method comprises an inner ring, an outer ring, a ball and sealing end covers; annular grooves are formed in the two end surfaces of the outer ring and the inner ring respectively, and the ball is located between the inner ring andthe outer ring; two annular protrusions are coaxially arranged on one end planes of the sealing end covers, and the sealing end covers are mounted on the left and right end planes of the inner ring and the outer ring through the annular protrusions and the annular grooves of the inner ring and the outer ring; a contact inner ring and a contact outer ring are arranged at the positions, in contactwith the ball, of the inner ring and the outer ring respectively, and limiting rings are arranged on the inner ring and the outer ring respectively; and an annular boss is arranged at the part, located between the inner ring and the outer ring, of each sealing end cover; and the part, in contact with the roll, of each annular boss is set to be arc-shaped. By virtue of the sealing bearing adopted in the method, resistance caused by the bearing to the motor can be reduced, so that the using efficiency of the motor is improved.

The invention discloses a gait abnormal degree evaluation method for wearable equipment and the equipment thereof, and the method comprises the steps: calculating and outputting a gait parameter and an abnormal degree comprehensive index of a user by employing angular speed and acceleration data collected by two inertial sensor units. According to the gait abnormal degree evaluation method, gait parameter information of each step when a user walks can be measured and output, the gait parameter information is compared with a gait parameter database of a healthy person, and the abnormal degree comprehensive index of the gait of the user is calculated. The method is convenient to use, is not limited by places, is low in cost, can achieve the high-precision evaluation of the gait of the user,is higher in reliability, and is better in popularization prospect.

The invention synthesizes a schiff base compound capable of efficiently selecting and recognizing fluorine ions. The schiff base compound is prepared through a reflux reaction of ethanol serving as a solvent, glacial acetic acid serving as a catalyst as well as benzidine and 2-hydroxyl-1-naphthaldehyde serving as substrates. Stimulating response of a receptor and negative ions in a dimethylsulfoxide solution is recognized and inspected through ultraviolet-visible absorption spectrums and fluorescence spectrums, the color of the solution can be changed from yellow to orange only when F<-> is added, green fluorescence of a main solution is quenched, and the effect of F<-> recognition is realized through two ways of naked eyes and fluorescence. A titration experiment proves that LOD (limit of detection) of the schiff base compound to the fluorine ions reaches 2.7*10<-7> mol/L, thus, the detection sensitivity to F<-> is very high, and the schiff base compound serving as a sensor receptor can rapidly and efficiently detect F<-> in the solution and has good application value.

The invention provides an online prediction method for ash combustible material content after combustion of a coal ash boiler. The online prediction method comprises the following steps: analyzing factors influencing boiler ash combustibles; adjusting a test result through certain boiler combustion; analyzing in conjunction with a boiler combustion theory to obtain an influence factor influencing the boiler ash combustibles. On the premise of ensuring a certain prediction accuracy, the online prediction method can be implemented in a boiler combustion external control system in a logical way, and complicated computation and modeling in similar nervous network model prediction are avoided, so that the online prediction method has a high application value on the aspect of online combustion optimization control of the boiler.

The invention discloses a sprint video cutting system and method in timing sport events. The system comprises a performance collection system, a video cutter, a streaming media server and a camera; the camera is connected with the streaming media server, and the camera is used for transmitting a collected sprint competition video of an athlete to the streaming media server; the video cutter is connected with the performance collection system and is used for cutting the competition video in the streaming media according to the time of the athlete to pass through the destination in the performance collection system, and the video cutter transmits cut segmented videos to the streaming media server. The system can provide cutting and storage services for the competition video of each athlete, realizes the practical difficulty that is not solved in the prior art ever, and provides better after game service and athlete interaction for the timing sport events.

The invention, which belongs to the technical field of functional material preparation, discloses a spherical nickel cobalt oxide-ceric oxide composite electrode material with a multi-stage structureand a preparation method thereof. According to the method, multi-stage spherical nickel-cobalt hydroxide is prepared by using nickel acetate and cobalt acetate as raw materials and isopropanol and 1,3-propanediol as solvents based on a solvothermal method; ion exchanging is carried out by using cerous nitrate and nickel-cobalt hydroxide as raw materials and ethyl alcohol as a solvent based on a solvothermal method to prepare nickel-cobalt-cerium hydroxide; and then high-temperature calcination is carried out in an air atmosphere to prepare a multi-stage-structure-based spherical nickel cobaltoxide-ceric oxide composite electrode material. The prepared nickel cobalt oxide-ceric oxide composite electrode material has a multi-stage-structure-based spherical shape formed by assembling of nanosheets; the spherical structure has a diameter of about 1.0 microns and a specific surface area up to 113.02 m<2> g<-1>. When the spherical nickel cobalt oxide-ceric oxide composite electrode materialis applied to the super capacitor, the good electrochemical energy storage performance is realized.

The invention discloses a graphene and silver nanowire loaded silk/sodium alginate porous composite material and a preparation method. The preparation process comprises the following steps: modifyingsodium alginate with PAMAM; preparing a silk/sodium alginate porous composite material through liquid nitrogen and freeze drying treatment; soaking the silk/sodium alginate porous composite material in a graphene oxide solution for sufficient adsorption; reducing with a reducing agent to obtain a graphene loaded silk/sodium alginate three-dimensional porous composite material; finally, performinglayer-by-layer self-assembly of a silver nanowire on the surface of the graphene loaded silk/sodium alginate three-dimensional porous composite material by use of electrostatic attraction, to finallyobtain the graphene and silver nanowire loaded silk/sodium alginate porous composite material. According to the invention, the sodium alginate and the silk are adopted as base materials, and the graphene and the silver nanowire are subjected to effective self-assembly to obtain the graphene and silver nanowire loaded silk/sodium alginate porous composite material which has huge application value in the fields such as photoelectric material, adsorption materials, biological materials and medical materials.

The invention discloses a park comment text emotion scoring method and system based on machine learning. The method comprises the steps of obtaining comment text data, preprocessing the obtained comment text data, including word segmentation and stop word removal processing, then performing vectorization representation on the comment text, then inputting the comment text into a regression device,establishing a mapping relationship with emotion scores, and performing emotion analysis by using a trained model. The park comment text is subjected to eigenvector representation, the relationship between the eigenvector and the emotion score is established, training is performed, and emotion scoring is performed by using the trained model. The score has continuity and diversity, the emotion positivity of public comments can be obtained, and the method is efficient, rapid, low in cost, suitable for research work in the field of urban parks and capable of achieving large-scale rapid analysis of emotions of users.

The invention discloses a lactic acid bacteria compound preparation for fertilizing saline-alkali soil. The lactic acid bacteria compound preparation comprises lactobacillus plantarum, lactobacillus rhamnosus, lactobacillus bulgaricus, saccharomyces boulardii and bacillus subtilis, and the mass ratio of the lactobacillus plantarum to the lactobacillus rhamnosus to the lactobacillus bulgaricus to the saccharomycetes to the bacillus subtilis is 2: (0.5-1): (1-1.5): (1-1.5): (0.5-1). The lactic acid bacteria compound preparation can effectively improve the porosity and water retention of soil, reduce the soluble salt content of the soil and adjust the pH value of the soil, so that insoluble phosphorus and potassium in the soil are converted into available phosphorus and potassium which can beutilized by crops, and the yield of the crops is increased.

The present invention discloses an unmanned aerial vehicle GPS location fault detection and reconstruction method based on distance measurement between vehicles. The GPS of an unmanned aerial vehicleis employed to obtain correlation properties of a calculation distance and a measurement distance obtained by a distance measurement sensor and construct a fault detection model to complete diagnosisof location faults of the unmanned aerial vehicle in a multi-unmanned aerial vehicle system. A consistency detection method of location and distances of non-central chi square distribution is employed, a node fault location method improving a wireless sensor network field is employed to detect and determine location faults caused by GPS of part of unmanned aerial vehicles being interfered or shielded in an unmanned aerial vehicle group, fully utilize advantages of the multi-unmanned aerial vehicle system and overcome the problem that a single unmanned aerial vehicle GPS is interfered and deceived. The unmanned aerial vehicle GPS location fault detection and reconstruction method improves the reliability of the detection result under the condition without improving the system hardware performances and has a good application value.

The invention provides an indoor bonsai soil cultivation additive and a preparation method. The additive comprises folium artemisiae argyi, mint, herba agastache, clove, pyrethrum, litsea cubeba, cortex cinnamomi, orange peel, shale diatom ooze and high-viscosity attapulgite. The preparation method includes: subjecting traditional Chinese medicine ingredients to crushing and extracting to obtain extract; well mixing and dispersing the extract and high-viscosity attapulgite; well mixing and stirring with extracted medicine residue and the shale diatom ooze. The additive can prevent breeding of pests like ants, worms and flies and mold when being applied in bonsai soil, provides a guarantee to healthy growing of bonsai, can effectively avoid foul odor emitted by the bonsai soil, plays a good role in purifying air and has high application value.

The invention discloses a video description method based on a high-order low-rank multi-modal attention mechanism, which is used for generating short and accurate description for a given video clip. The method specifically comprises the following steps: obtaining a video data set for training a video description generation model, and defining an algorithm target; modeling time sequence multi-modalfeatures in the video data set; establishing a high-order low-rank multi-modal attention mechanism on a decoder based on the time sequence multi-modal characteristics; generating a description of aninput video using the model. The method is suitable for video description generation of a real video scene, and has better effect and robustness for various complex conditions.

The invention belongs to the field of pesticides, and discloses a hydrazide-containing quinazolinone derivative, and a preparation method and application thereof. The structure of the derivative is shown as a formula (I). The compound is simple in preparation method, has an obvious inhibition effect on rhizoctonia solani and gibberella zeae, and can be applied to preventing and treating plant fungal diseases.

The invention discloses a functional region dividing method and device based on a remote-sensing image, and relates to the technical field of artificial intelligence. The method comprises that an SIFT (Scale-invariant feature transform) feature is extracted from the remote-sensing image to be identified; according to the SIFT feature of the remote-sensing image to be identified as well as an image feature expression dictionary, an image feature histogram of the remote-sensing image to be identified is generated; and according to the image feature histogram and a functional region classifier, a functional region of the remote-sensing image to be identified is determined. According to the invention, city functional areas of different satellite data can be divided automatically, rapidly, conveniently and accurately, and automatic functional region division has substantial application values in the aspects including city planning, disaster prevention, emergent disaster rescue and business investigation.

The invention relates to the technical field of biomass paint, and especially relates to a straw paint preparation method. The method uses agriculture waste such as straw as a raw material, a novel processing technology is employed, and a straw emulsion is prepared. Compared with a same model emulsion on the market, the cost of the straw emulsion is reduced by about 30%, the straw emulsion can beuse for processing the straw paint, and can be used for preparing a base material for various adhesives; so that the straw paint has wide market prospect and large application value. Compared with a same model paint on the market, the cost of the straw paint is reduced by about 30%, and the straw paint has the advantages of environmental friendliness and excellent performance.

The invention discloses an application of CKX2 gene and CKX3 gene for improving cold resistance capability of plants. The CKX2 gene and CKX3 gene are sourced from Col ecotype arabidopsis thaliana, wherein the nucleic acid sequences of cDNAs of the plant are represented as the SEQ ID No.1 and SEQ ID No.2. The invention provides a gene resource for culturing a novel species of cold resistant plant.The application has excellent potential application value and lays a theoretical foundation for researching mechanism of stress responding signal of plants and molecular mechanisms of tolerance against adverse environments.

The invention relates to a broadband circularly polarized metasurface antenna, which solves the technical problems of unstable directional diagram and narrow bandwidth. Two layers of dielectric plates and three metal layers are adopted, wherein the two layers of dielectric plates have the same specification; the three metal layers are a super-surface patch at the top layer, a slotted floor at the middle layer and a feed structure at the bottommost layer respectively; a metasurface is a 4 * 4 metal square patch, and an annular groove used for forming annular current to generate circularly polarized radiation is formed in the metasurface; and the middle metal floor is provided with four rectangular grooves with the same size for signal coupling, so that the problem is well solved, and the circularly polarized antenna can be applied to a broadband circularly polarized antenna with a stable directional diagram.

The invention relates to a synthetic process of a phosphorus ligand type compound. The synthetic process comprises the following steps: 1, dissolving 1-bromopropane and triphenylphosphine in dichloromethane, stirring uniformly, then adding organic acid to adjust the pH value, maintaining the pH value of the reaction system between 1.2 and 2.0, heating to perform reflux reaction, and then adjusting the pH value of the reaction system to be 3.2-3.8 by using sodium hydride; 2, cooling, crystallizing and filtering to obtain a filter cake; and 3, washing the filter cake by adopting dichloromethane, and performing vacuum drying to obtain an off-white solid namely (1-propyl) triphenyl phosphorus bromide. The process provided by the invention can be performed smoothly without nitrogen protection, so that the operation process of synthesis is simpler and the yield can reach over 90%; and the process is also suitable for synthesizing (3-bromopropyl) triphenyl phosphorus bromide by adopting 1,3-bromopropane and triphenyl phosphorus bromide, is very suitable for industrial large-scale application, and has significant application values.

The invention provides a method for constructing a full-system parameter value traceability chain model of an airplane. The method comprises the steps of constructing an aircraft-level dimension model, system-level and subsystem-level dimension models and an equipment-level dimension model; based on the aircraft-level dimension model, the system-level and subsystem-level dimension models and the equipment-level dimension model, carrying out metering characteristic annotation according to technical parameters of each level; performing parameter normalization classification on the same meteringcharacteristic label; directly facing parameters, analyzing detection and calibration requirements, determining a detection and calibration strategy, sequentially matching detection equipment, verification/calibration equipment and verification/calibration parameters, and measurement standard equipment and measurement standard parameters in a corresponding hierarchical manner, and constructing anaircraft whole system parameter value traceability chain 1# model.

The invention discloses an oil storage tank detection method based on a high-resolution optical remote sensing image. The method comprises the steps of 1, making an oil storage tank data set based onthe high-resolution optical remote sensing image; 2, training the oil storage tank data set by using a YOLOv4 algorithm to obtain a training result data set I; 3, optimizing the YOLOv4 algorithm by using Anchor Boxes and a non-maximum suppression algorithm; 4, training the oil storage tank data set in the step 1 by using the YOLOv4 algorithm optimized in the step 3 to obtain a training result dataset II; and 5, comparing the data set I with the data set II to obtain a data set II identification accuracy of the oil tank superior to the data set I identification accuracy of the oil tank. The method is used for identifying and classifying the fixed-roof oil tank and the external floating-roof oil tank and analyzing the crude oil reserves of the external floating-roof oil tank.

The invention belongs to the technical field of target tracking, and particularly relates to a ballistic missile whole-course ballistic estimation method and system based on improved autonomous multi-model, and the method comprises the steps: constructing a motion model set for whole-course ballistic estimation, wherein the model set at least comprises an accurate power sub-model for non-maneuvering section detection and a three-dimensional current statistical sub-model for maneuvering section detection; according to the change of the motion state of the missile in maneuvering detection, adopting a hard decision to perform sub-model switching by setting the probability of the sub-model so as to achieve full-flight-stage tracking of the ballistic missile. According to the method, the whole-course trajectory estimation of the ballistic missile is achieved based on the improved autonomous multi-model of the hard decision, the stable tracking of the ballistic missile in the whole flight stage is achieved, and meanwhile, the error of the non-maneuvering trajectory estimation is reduced; because the missile is in the free section of the non-maneuvering section for a long time, the schemehas a good application value for the whole-course stable tracking and high-precision trajectory estimation of the ballistic missile.