67results about How to "Has practical application value" patented technology

The invention discloses a traffic jam prediction method for an overpass based on data drive, and the method comprises the following steps: collecting the traffic state data of entrance and exit rampsof an overpass road surface; carrying out the preprocessing of the traffic data of the exit ramp of the overpass, and obtaining the vehicle flow speed and density of a controlled road segment; constructing a macroscopic traffic flow map of the controlled road segment through three indexes (traffic flow, speed and density), and calibrating a jam speed threshold value; selecting the speed as a jam feature, extracting a historical jam speed sequence, carrying out the clustering according to the difference of jam degree and obtaining the jam type; constructing a multi-scale speed predictor according to the historical speed data; inputting a real-time speed data sequence into the multi-scale speed predictor, obtaining a predicted speed sequence, and carrying out the jam prediction through a classifier. The method can achieve the effective prediction of the traffic situation in a certain future period according to the historical traffic situation, achieves the judgment and piling of the predicted speed sequence, and achieves the effective judgment of the traffic jam degree in future.

The invention discloses an aeroengine residual life prediction method based on multi-stage Wiener process consistency check. In the method, a statistical smoothing method smoothes engine performance monitoring data before and after maintenance. A heuristic segmentation algorithm performs performance degradation multi-stage partitioning; according to the multi-stage and randomness of engine performance degradation process, a performance degradation model is established by using multi-stage Wiener process. The consistency of the mean values of engine performance monitoring data before and aftermaintenance is checked by using the normal population mean consistency check method based on multi-stage Wiener process. According to the consistency test results of the degradation data before and after maintenance, it is decided whether the residual life prediction of the engine after maintenance fuses the monitoring data of the engine before maintenance, and the parameters of the multi-stage Wiener process are estimated by the monitoring data, and the residual life of the engine after maintenance is predicted. The method of the invention improves the accuracy of the model parameter estimation and the engine life prediction result, and has high practical value.

The invention discloses an active drive device for a hybrid electric vehicle capable of independently controlling power output of a left wheel and a right wheel, and the active drive device comprises an engine, a generator, two epicyclic gear trains, a left drive motor and a right drive motor; a first epicyclic gear train is used for realizing the power coupling of the engine, the generator and an input component of a second epicyclic gear train; the second epicyclic gear train is used for realizing the power coupling of the left/right drive motor and an output component of the first epicyclic gear train; the output component of the first epicyclic gear train and the input component of the second epicyclic gear train are connected with each other through a spur gear pair or a bevel gear pair in a driving way; and the left/right drive motor is respectively connected with a left wheel side drive shaft and a right wheel side drive shaft in a driving way. The active drive device has the advantages of compactness in structure, multiple running modes, stepless speed changing of the engine and capability of independently controlling the power output of the left and the right wheels.

The invention discloses a residual service life prediction method for large-scale equipment based on multi-parameter feature fusion. The method comprises the steps: obtaining multiple sensor time sequence parameters of large-scale equipment in a laboratory through a large-scale online monitoring system; performing regression analysis on the multi-parameter continuous values by using a ReliefF algorithm, and obtaining a parameter type with relatively large correlation with the equipment state through feature weight screening; performing data dimension reduction and feature extraction on the screened parameters based on a principal component analysis method, and obtaining a health index representing the operation state of the large-scale equipment through weight fusion; constructing an HMM model based on an expectation maximization algorithm, taking the health indexes as a training set for model training, and finding a grading model used for evaluating the equipment health state corresponding to the current health index; calculating an exponential likelihood value through a Viterbi algorithm to obtain a health index nearest to the likelihood value, and predicting an exponential difference by using a weighted average method to obtain a health state fitting curve; and calculating a residual service life prediction value of the large-scale equipment.

The invention discloses a two-stage parameter calibration method for highway traffic safety simulation analysis. The method comprises the steps of 10) acquiring real-time traffic flow data, road design data and weather data of a highway; 20) building a real-time accident risk prediction model and a VISSIM simulation model; 30) performing first-stage parameter calibration: calibrating parameters remarkably influencing a simulated vehicle speed change; 40) performing second-stage parameter calibration: calibrating parameters remarkably influencing a simulated real-time accident risk value; and 50) if the speed and real-time accident risk of the VISSIM simulation model reach simulation precision, indicating that the calibration is finished, otherwise, calibrating excluded parameters in the two calibration steps to improve the simulation precision. According to the two-stage parameter calibration method for the VISSIM simulation model, provided by the invention, the accident risk value is further simulated on the basis of reproducing temporal and spatial variation of traffic flow, so that the VISSIM simulation can be enabled to directly evaluate a traffic accident risk.

The invention provides a method for identifying default risks of P2P network lending borrowers. The method comprises the following steps of: 1, acquiring P2P lending application data information; 2, preprocessing data to obtain lending description text information; 3, carrying out feature extraction on the lending description text information; 4, identifying a default risk of P2P network lending through combining objective basic information features of a borrower and the lending description text information by using a support vector machine classification method; and 5, carrying out SVM kernelfunction parameter optimization by adoption of ten-fold cross validation. According to the method for identifying default risks of P2P network lending borrowers, the default identification correctness is improved by 10% or more than 10% and the highest default identification correctness is 73.42%.

The invention belongs to the field of metal testing analysis technology in a metallurgical industry, and particularly relates to a method for simultaneously measuring multiple metal elements in zinc smelting acid leaching residue through inductively coupled plasma atomic emission spectroscopy, wherein measurement is performed according to the detecting principle of the inductively coupled plasma atomic emission spectroscopy. The method comprises the steps of determining an experiment condition, preparing single-element standard solution, preparing mixed standard solution, preparing series standard working solution A, preparing series standard working solution B, performing sample processing, drawing a working curve, checking coexisting element interference, checking an overlimit conditionand a precision condition, performing a recovery rate experiment and checking a stability condition. The method of the invention can simultaneously detect multiple elements in zinc smelting acid leaching residue and realizes high detecting result precision and high stability in an instrument detecting process. The method of the invention can effectively reduce pressure in enterprise detecting andresidue processing. Not only is an important meaning realized, but also high necessarity is obtained.

The invention provides a preparation method of biological feed. The method comprises the following steps of crushing stalks; mixing crushed stalks with wheat bran; adding xylanase and cellulase; then, supplanting and adding water accounting for 75 to 85 percent of the weight of the stalks; then, inoculating lactobacillus liquid and yeast liquid; obtaining the biological feed after the enzymolysis and fermentation. Through the optimized enzymolysis combination, the microbial combination anaerobic fermentation is combined; the water content is reduced to a proper degree, so that the treatment cost of per ton of stalks is reduced by about 300 Yuan; the practical application values are basically realized. The prepared biological feed uses the weight ratio of 20 percent for replacing the complete formula feed; the growth speed, differences of the feed conversion ratio and the like of live pigs are not obvious, but the grain consumption and the live pig weight increase cost are obviously reduced; the contents of pork protein, amino acid and calcium can be increased; the contents of fat and cholesterol are reduced.

The invention provides phenyl phosphonate with photocatalytic activity as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method for phenyl phosphonate comprises the following steps that metal salt and phenylphosphonic acid are dissolved in an organic solvent, and a solvothermal method is adopted to prepare phenyl phosphonate. According to phenyl phosphonate as well as the preparation method and application thereof, a phenyl phosphonate photocatalytic material is synthesized by adopting the solvothermal method for the first time and is applied to photocatalytic hydrogen production and carbon dioxide reduction; and meanwhile, the raw materials are low in price, easy to obtain, environmentally-friendly, safe and pollution-free, the preparation method is simple and easy to operate, and the values of industrial production and practical application are achieved.

The invention relates to a continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material and a preparation thereof. The continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material comprises the components in parts by weight: (1) 100 parts of polypropylene, (2) 0.1-1 parts of an antioxidant, (3) 0.2-2 parts of a flow promoter, and (5) 1-5 parts of a compatilizer; after being premixed according to a certain proportion, the components are melted, mixed and extruded into a hanger-shaped mold head by a double/single-screw machine unit to be shunted; finally, the components enter an S-shaped mold head to sufficiently soak carbon fibers so as to prepare the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material. Compared with the traditional carbon fiber reinforced PP composite material, the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material provided by the invention has the advantages that the mechanical property of the continuous carbon fiber reinforced composite material prepared by using a special soaking process is greatly improved because the length retention rate of carbon fibers in a PP carrier is very high or the carbon fibers are continuous in the PP carrier; on the basis of a continuous network structure, the electricity-conductive and heat-conductive performances of the continuous carbon fiber reinforced composite material are also greatly improved.

The invention relates to a high-weatherability high-flow glass fiber dipping polyolefin formula and a preparation method thereof. The high-weatherability high-flow glass fiber dipping polyolefin formula comprises the following components by mass part: 1) 100 parts of polyolefin; 2) 0.5-2 parts of an anti-ultraviolet aging auxiliary agent; 3) 0.5-2 parts of an anti-oxidant; 4) 0.2-2 parts of a flow promoter; 5) 2-10 parts of a flexibilizer; and 6) 1-5 parts of a compatilizer. The components are pre-mixed according to certain proportion, the components are fusion through a double/single screw extruder, then mixed and extruded to a die head for shunting and dipping, and the high-weatherability high-flow glass fiber dipping polyolefin can be prepared. The high-weatherability high-flow glass fiber dipping polyolefin has the advantages that a hyper branched tail end active function group and glass fiber are combined, interface combination capability between polyene resin and glass fiber are enhanced, and the mechanical properties are increased.

The invention relates to a preparation method of a water-stable triazinyl metal organic frame material, and belongs to the technical field of metal organic frame materials. The method comprises the following steps: dissolving bismuth metal salts and triazinyl organic acid in an organic solvent; and preparing by using a solvothermal method to obtain CAU-7-TATB, namely a metal organic frame materialformed by Bi and 2,4,6-tris(4-carboxy phenyl)-1,3,5-triazine. The triazinyl CAU-7-TATB synthesized by the solvothermal method has good water stability, and structural collapse and metal leakage cannot be caused even if the triazinyl CAU-7-TATB is placed in an aqueous solution for seven days; the water-stable triazinyl metal organic frame material is quite suitable for adsorbing heavy metal ions;and moreover, the CAU-7-TATB does not need to be modified later, and by N atoms on the triazinyl, an adsorption effect is played directly, and the water-stable triazinyl metal organic frame material has good adsorption effect on various heavy metal ions, and particularly has preferable and excellent selectivity on adsorption of lead ions.

The invention discloses a characterization method and device for unbalance degree of each turning direction of an intersection, electronic equipment and a storage medium, and belongs to the technicalfield of traffic. According to the method, indexes influencing intersection imbalance indexes are analyzed in detail, and each turning entrance lane imbalance index and each opposite entrance lane imbalance index in an intersection are determined; and a calculation formula is improved to reflect the overall unbalance state of the intersection, whether signal timing and/or phase setting of the intersection is adjusted or not is judged according to the unbalance index, the intersection can be guided to conduct signal timing optimization design, adjust the phase and the phase sequence, so the traffic operation condition of the whole intersection is improved, the traffic safety of the intersection is improved, the vehicle running efficiency is improved, and the traffic safety is guaranteed. The problems that in existing intersection traffic analysis, definition of imbalance indexes is fuzzy, division is not comprehensive enough, the imbalance degree of an intersection is difficult to accurately measure, and intersection problem analysis is difficult to go deep are solved or partially solved.

The invention discloses a soaking solution capable of improving the germination of capsicum Chinese joaquin seeds and an application method of the soaking solution and relates to a soaking solution capable of promoting the seed germination and an application method of the soaking solution. The soaking solution is prepared by mixing a gibberellin 3 solution, a potassium nitrate solution and a polyethylene glycol 6000 solution according to a volume ratio of 1 to 1 to 1, wherein the concentration of gibberellin 3 is 0.001-3g/L; the concentration of potassium nitrate is 0.01-40g/L; the concentration of polyethylene glycol 6000 is 1-90g/L. The application method of the soaking solution comprises the following steps: washing clearly soaked seeds, storing the washed soaked seeds at the temperature of 28 DEG C and accelerating the germination. The soaking solution is capable of effectively accelerating the germination of capsicum Chinese joaquin seeds so as to increase the germination rate and the germination index, stimulating the activity of the seeds and inducing the seeds to quickly and regularly germinate; the bottleneck problems of low germination rate and irregular seedling emergence in the production are solved; the soaking solution has an important practical application value and can be widely used for seedling breeding, cultivating and producing of capsicum Chinese joaquin.

The invention discloses an engine bearing fault prediction method based on multiple stages, relating to the field of engine health management. According to the engine bearing fault prediction method based on the multiple stages, bearing faults of an engine can be predicted in the multiple stages, and finally the purposes of reducing the maintenance cost and guaranteeing the operation safety of theengine are achieved. Prediction is carried out according to the following steps: 1) processing an original vibration signal of a bearing; 2) counting the rms characteristic curve containing a large number of data points according to a certain statistical value; 3) finding out mutation points by using statistical process analysis, and analyzing curves before and after the mutation points by usingstatistical overview; 4) dividing rms counted in the step 2) into multi-stage signals; and 5) inputting the obtained multi-stage data into a long-short-term memory network for prediction. Multi-stageprediction can be carried out on bearing faults of the engine, and the purposes of reducing maintenance cost and guaranteeing operation safety of the engine are achieved.

The invention relates to a formula of a glass fiber-impregnated PA6 (nylon 6) with high weather-resistant property and high fluidity and a preparation method thereof. The formula comprises the following components in parts by mass: 100 parts of PA6 resin (1), 0.5 to 1.6 parts of anti-ultraviolet aging additive (2), 0.5 to 1 part of antioxidant (3), 0.2 to 1.2 parts of flowing promoter (4), 2 to 10 parts of toughener (5), and 1 to 5 parts of compatilizer (6). The preparation method comprises the following steps of premixing the components according to a certain ratio; using a double/single-screw extruder to melt, mix and extrude into a die head, separating flow and impregnating, so as to obtain the glass fiber-impregnated PA6 with high weather-resistant property and high fluidity. The formula and the preparation method have the advantage that by combining hyperbranched end active functional groups and glass fiber, the interface bonding ability between polyolefin resin and glass fiber is enhanced, and the mechanical property is improved.

The invention provides a traffic ticket business processing device based on multimode interaction. The traffic ticket business processing device comprises a signal acquisition module, a processing module and a guiding module; the signal acquisition module comprises a voice acquisition unit and an image acquisition unit; the processing module comprises an identification unit, an analysis unit and a plurality of preset deep learning models; the identification unit comprises a face detector and a decoder; a multi-mode signal includes voice and a user image. Multimode interaction can be carried out, background noise interference can be effectively suppressed, voice can be identified more accurately to acquire travel demands of users, ticket business processing efficiency is high, and ticket business processing is more convenient. The traffic ticket business processing system provided by the invention has corresponding advantages due to the adoption of the traffic ticket business processing device. The traffic ticket business processing method provided by the invention has little dependence on manpower, is beneficial to shortening the ticket business processing time, and improves the travel experience of a user.

The invention discloses a super-hydrophilic conductive nanofiber membrane and a method for treating emulsion by using the super-hydrophilic conductive nanofiber membrane, and relates to the field of oil-water separation. Polyacrylonitrile is dissolved in an N, N-dimethylformamide solution containing a conductive polymer and a dopant, then an electrostatic spinning method is adopted to prepare the super-hydrophilic conductive nanofiber membrane, after the membrane is pre-wetted with distilled water, oil-water emulsion is filtered under the condition of low dual-pressure driving, and compared with the condition of no electric field assistance, the super-hydrophilic conductive nanofiber membrane has the advantages that the super-hydrophilic conductive nanofiber membrane can be used for filtering oil-water emulsion; by applying the electric field, membrane pollution can be effectively relieved, flux loss in the separation process is reduced, the COD removal rate is 90% or above, the total average flux increasing proportion in the filtering period can reach 591%, and the flux is not remarkably attenuated along with time. The super-hydrophilic conductive nanofiber membrane provided by the invention can enhance the anti-pollution performance and improve the treatment flux under an electric field auxiliary condition, has good treatment flux, treatment effect and anti-pollution performance, and is convenient in material preparation, mild in operation condition and wide in applicable treatment object range.