416results about How to "Reduce preprocessing time" patented technology

A method and device for communicating data within a packet frame unit between a terminal and a base station are disclosed. The terminal communicates the packet data to the base station. In response, the base station transmits a channel occupying signal, if the data transmission from the terminal is perceived by the base station. The terminal continues the communication of the packet data, while the channel occupying signal is active, determines whether the base station receives the communicated packet data, and ends the process for communicating the packet data if the base station receives the communicated packet data. If the base station fails to receive the communicated packet data, the terminal is informed through the channel occupying signal. Thereafter, the terminal discontinues its communication and then re-attempts to communicate the packet data from the beginning.

Disclosed is a three-dimensional face recognition method based on feature points. The method comprises the following steps that firstly, a three-dimensional face model is preprocessed, and point cloud data are mapped into a depth image through linear interpolation; then, Gabor filtering is applied to the depth image to roughly locate the face feature points, and then the feature points are precisely located on a face point cloud according to ShapeIndex features; then, a series of equally-measured contour lines with the nose bridge as the center is extracted for representing the shape of the face, and Procrustean vector features (distance and angles) with posture invariance are extracted as recognition features; finally, weighted fusion is carried out on all equally-measured contour line features for final recognition. The three-dimensional face recognition method has the good locating and recognition performance, and is good in robustness in expression and posture.

The invention discloses a method for preparing a honeycomb ceramic catalyst. The method comprises the following steps of: performing ultrasonic pretreatment on a honeycomb ceramic matrix in pretreatment fluid, loading a nano serous fluid coating, and loading active ingredients. A catalyst coating obtained by the method is high in combination degree with the matrix and difficult to crack and strip, and a preparation process and equipment are simple, so that the catalyst has high usability and activity stability; and the catalyst can still keep high activity under the condition of the washing of high-airspeed air flow and thermal shock, so that the long-term stable running of the catalyst can be ensured.

The invention discloses a method for reconstructing human facial image super-resolution based on the similarity of facial characteristic organs. The method comprises the following steps of: 1, establishing a high-resolution front human facial image library and a high-resolution characteristic organ image library by utilizing a gray scale projection method according to a preset ideal high-resolution human facial image; 2, extracting a low-resolution characteristic organ image from a low-resolution target human facial image; 3, performing bicubic interpolation on the low-resolution target humanfacial image and the low-resolution characteristic organ image to acquire a training image set of the low-resolution image; 4, constructing characteristic space corresponding to the training image set by the training image set to reconstruct projection vectors of a corresponding high-resolution integral human facial image and a corresponding high-resolution organ image; and 5, fusing the high-resolution integral human facial image and the high-resolution characteristic organ image into a high-resolution target human facial image. The method has the characteristics of less preprocessing time, high retrieval accuracy of training images, high trueness of the acquired human facial images and the like.

The invention relates to a method for measuring concentration of low-concentration soluble organic nitrogen in water, in which the nano filtration membrane separation technology is employed to accurately measure concentration of soluble organic nitrogen. In the preparation process before pretreatment, membrane with a pore diameter being more than or equal to 0.22mu m and less than or equal to 0.45mu m is employed to remove particle impurities of a water sample.300-500mL of filtered water sample is taken, pH value is adjusted to 6.0-9.0; in the process of pretreatment, selective nano filtration membrane with a cut-off molecular weight being 150-500 Dalton is adopted for dead-end or cross flow filtration; so that 6-15 times of concentration and enrichment of DON in the water sample can be achieved; the DON content is obtained by using the total nitrogen to reduce other forms of nitrogen content of other measurements and then dividing actual concentration times. In the invention, accuracy and precision of DON measurement are greatly improved, so that the problems that negative values often appear in the direct water sample determination method and concentration standard deviation is large are solved; in addition, the whole measurement process of the measurement method is simple and effective, easy to operate, low in cost, so that the measurement method can be widely applied to surface water and ground watermonitoring and monitoring and analysis of small, medium and large waterplants.

An oxygen-nitrogen top blowing converter process for desulfurization is carried out by blowing oxygen-nitrogen at its top while blowing nitrogen or inertial gases at its bottom to desulfurise. Its top blowpipe controls oxygen blowing to desulfurise in two modes, with mixed gases at some ratio or with pure oxygen switched with pure nitrogen, in order to inhibit sputtering and to enhance stirring in smelting pool when sputter occurs by excessive oxidation, so that balance of (P) / [P] in dynamics is improved. It desulfurises better when bottom blowing is weak, can inhibit decarbonise reaction effectively with >70% recovery of Mn in molten iron, also, strengthen blowing at top to stir strongly and shorten pre-treat time, increase rate of desulfurization, control slag elimination in procedure effectively to prevent sputtering, and increase stability and security.

The invention discloses a construction method for an HPLC (high performance liquid chromatography) finger-print chromatogram of ginseng and astragalus strengthening injection, and application of the finger-print. The construction method includes the following steps: performing online automatic pretreatment for a sample through utilizing a double-pump double-gradient high performance liquid chromatograph; and then, performing detection in a manner of series connecting DAD-ELSD detectors and switching wavelengths of 266nm / 208nm ultraviolet detecting waves, and obtaining the HPLC finger-print chromatogram of the ginseng and astragalus strengthening injection. 21 common chromatographic peaks are detected in the HPLC finger-print chromatogram of the ginseng and astragalus strengthening injection, which is obtained through the method, 20 chemical components in the finger-print chromatogram are testified through adopting the UFLC-DAD-MS / MS technology, and the diagram of the finger-print chromatogram is shown in the figure 1 in the attached figures of the explanatory memorandum. The method disclosed by the invention can correctly reflect the overall quality characteristics of the ginseng and astragalus strengthening injection, can comprehensively monitor and control the quality of raw material drugs, semi-finished products and finished products, and can perform quality control and fake prevention through comparing similarity of chromatogram fingerprint characteristics.

The invention discloses a manufacturing process for a lambdoidal control arm. The manufacturing process comprises the following steps of: sawing an extruded bar; heating the extruded bar; rolling and forging the extruded bar to form a blank; bending to form the blank; preforming a forged die; finally forming the forged die; and trimming the forged die. In the manufacturing process, the extruded bar is taken as a raw material; the blank is heated to 440 DEG C-480 DEG C through electric induction; the blank is rolled and forged twice by a forging roll to realize volume distribution; the processes of bending to form the blank, preforming the forged die and finally forming the forged die are carried in sequence; and the trimming process is carried out in a thermal cutting manner. Compared with the prior art, a repairing process and a secondary heating process are reduced, the processing steps for the lambdoidal control arm are simplified, production cost for the product can be lowered, production rate can be increased, and product performances can be ensured.

The invention discloses a method for preprocessing in the photographing process of a mobile terminal and a mobile terminal. The method comprises the following steps: the mobile terminal enters a photo mode according to a user command; the mobile terminal further detects moving state information of the mobile terminal through a first sensor after detecting that focusing of a camera in the mobile terminal is successful; whether the mobile terminal is in a relatively static state is judged according to the moving state information; and the mobile terminal simulatively triggers photographing to acquire a current image and preprocesses the current image if the mobile terminal judges that the mobile terminal is in a relatively static state and the time of duration exceeds a preset time. The method provided by the embodiment of the invention has the advantages of high photo processing speed and efficiency and shorter photo processing time.

The invention discloses a preparation method of agarose immune magnetic microspheres and applications thereof, and relates to a preparation method of microspheres and applications thereof, which solves the technical problems that an existing purified monoclonal antibody is complex in process, is low in yield, and is high in cost, and coupling agents are hypertoxic. The preparation method comprises the following steps of: 1. preparing a ferric oleate precurser; 2. preparing a magnetic fluid; 3. preparing an oil phase and a water phase; 4. preparing agarose magnetic microspheres; 5. preparing activated and crosslinked agarose magnetic microspheres; 6. preparing agarose magnetic microspheres joined with spacer arms; and 7. preparing agarose immune magnetic microspheres. The agarose immune magnetic microspheres provided by the invention are used for purifying genetic engineering recombination trastuzumab monoclonal antibodies. The agarose immune magnetic microspheres prepared by the invention are used for the field of separating and purifying the monoclonal antibodies.

The invention discloses a surface-aminated Fe3O4 nano particle and a preparation method and the application thereof. The method comprises the following steps: (1) in inert atmosphere, FeCl2 and FeCl3 are added into the mixed solution of sodium hydroxide aqueous solution and hydrochloric acid aqueous solution for reaction and Fe3O4 nano particles are obtained; (2) ethanol solution of the Fe3O4 nano particles is prepared; in inert atmosphere, strong ammonia water and tetraethoxysilane are added into the ethanol solution of the Fe3O4 nano particles and after reaction, modified Fe3O4 nano particles are obtained; and (3) the ethanol solution of the Fe3O4 nano particles with a good dispersion effect is prepared; in inert atmosphere, 3-aminopropyl triethoxy silane is added into the ethanol solution of the modified Fe3O4 nano particles and after reaction, the surface-aminated Fe3O4 nano particles are obtained. The aminated Fe3O4 nano particles provided by the invention can have good adsorption capacity to 5 types of phenylarsonic acid at the same time. At the same time, as the aminated Fe3O4 nano particles have superparamagnetism, centrifugalization is unnecessary for sample treatment. Thus, the steps of pretreatment of samples are greatly simplified, the pretreatment time is shortened and the efficiency of the pretreatment of samples is increased.

An embodiment of the invention provides a compressed image treatment method and device, electronic equipment and a computer readable medium. The compressed image treatment method comprises the following steps: acquiring an original image of which the format is JPEG, and carrying out entropy decoding and inverse quantization treatment on the original image to obtain a pretreated image; carrying outneural network algorithm training on the pretreated image; and finally, deducing the original image by parameters of a neural network of the pretreated image obtained by training to obtain a deducedresult. The method can be carried out on a GPU, and pretreatment time for data decompression required for training and time for deducing of the neural network are shortened.

The invention discloses a low-temperature scouring and bleaching agent and application thereof in pretreatment process of cotton and a cotton blended fabric. The low-temperature scouring and bleaching agent comprises the following compositions in part by weight: 85-95 parts of anhydrous sodium metasilicate, 340-380 parts of sodium metasilicate pentahydrate, 215-235 parts of soda ash, 16-20 parts of caustic soda, 34-38 parts of heterogeneous C10 ethyoxyl compound, 34-38 parts of sorbitan fatty acid ester and 90-110 parts of dicyandiamide. When the low-temperature scouring and bleaching agent is applied in the pretreatment process of the cotton and the cotton blended fabric, the traditional high-temperature high-alkali cooking and bleaching process is improved into a low-temperature less-alkali combined cooking and bleaching short flow process, so the low-temperature scouring and bleaching agent is economic and environment-friendly, and has excellent effect on the pretreatment of the cotton and the cotton blended fabric.

The invention discloses a method for efficiently degrading lignocelluloses raw material. The method comprises the following steps of: simple smashing of raw material as well as enzymolysis of normal pressure microwave unite alkali liquor and cationic surface active agent disposal raw material and nonionic surfactant auxiliary cellulose, wherein the roughly smashed lignocelluloses raw material, the cationic surface active agent and the alkali liquor are mixed, after microwave processing at normal temperature, liquid and solid are separated, and furthermore, the nonionic surfactant auxiliary cellulose is added for solid enzymolysis so as to obtain a sugar liquid. According to the method, the advantages of the physical method and the chemical pretreatment method are complementary, so that the degree of crystallinity of the cellulose raw material is effectively lowered, the pretreatment time is shortened, and the pretreatment effect is improved; furthermore, alkali liquor with low concentration is beneficial to effective recycle in industrial production, pretreatment of lignocelluloses raw material at normal temperature can also lower the energy consumption in the pretreatment process obviously, and sugar liquid with higher concentration can be obtained in shorter hydrolysis time as the nonionic surfactant auxiliary cellulose is used for enzymolysis.

A method for improving straw and excrement mixed anaerobic digestion gas production performance by biochemical pretreatment of maize straw belongs to the field of anaerobic digestion of organic solid waste, and comprises the following steps: extracting biogas liquid from a biogas liquid pool, and sieving with a sieve; crushing straw, uniformly mixing the crushed straw with the biogas liquid, placing the obtained mixture in a closed vessel, and pretreating in a thermostat at 35 DEG C for 1 to 3 days; uniformly mixing the obtained material with excrement, inoculating anaerobic digestion sludge, adjusting the pH, adding water for dilution and performing moderate-temperature anerobic fermentation. Compared with the prior art, the method has the following benefits: (1) the pretreatment time is remarkably shortened by 5-14 days; (2) the anerobic fermentation period is remarkably shortened by 23.08-43.59%; (3) the yield of methane is remarkably improved by 25.72-36.55%; (4) the process is simple, the cost is low, and the operation is easy.

The invention discloses an automobile interior acoustic field prediction method based on a partition-of-unity finite element-meshless cell. The method comprises the steps of utilizing an automobile interior air acoustic cavity mesh model, defining the cell node support region of the automobile interior air acoustic cavity mesh model by use of the relation of a layer of connected nodes, constructing a local approximation function by use of a radial point interpolation method within the node support region of the automobile interior air acoustic cavity mesh model, and meanwhile, performing approximation by use of an isoparametric element shape function within the global mesh range of the automobile interior acoustic cavity, constructing a shape function and the gradient thereof at a Gauss integral point of the automobile interior acoustic cavity model in an isoparametric element integration manner, constructing the Galerkin weak-form of an acoustic equation of automobile interior acoustic cavity problems to obtain the system equation of the automobile interior acoustic cavity mesh model, thereby predicting the modal frequency and the mode of vibration of the automobile interior acoustic cavity, and meanwhile, predicting the acoustic response of the automobile interior acoustic cavity under the excitation of an engine and assessing the calculation results. The automobile interior acoustic field prediction method based on the partition-of-unity finite element-meshless cell is capable of obtaining better calculation results than a finite element method in the automobile interior acoustic cavity vibration noise prediction problem.

The invention relates to a solid sampling-non-dispersion atomic fluorescence photometer collocating device and an analyzing method. The device comprises a solid sampler, an integrated interface, a sample pipe, a peristaltic pump, a tee joint, a gas-liquid separator, a detector and a computer. The method comprises the following steps of: volatilizing an analyzing element in a volatile halide way and absorbing by absorption liquid by adding an auxiliary heat release agent or an ashing auxiliary agent in the solid sampler. The absorption liquid is introduced into a chemical steam generating system for reacting with potassium borohydride (sodium); and the generated volatile hydride or atomic steam is carried into an instrument atomization area for being detected by atomic fluorescence. The invention directly adopts solid sampling, rapidly realizes the detection of toxic elements, such as arsenic, stibium, selenium, mercury, and the like in the samples, such as geology, environment, food, biology, and the like and has the advantages of higher analyzing speed, low analyzing cost, high detecting sensitivity, high device portability, environmental protection, and the like.

The invention relates to a full-automatic QuEChERS preprocessing all-in-one machine and a preprocessing method. The preprocessing all-in-one machine comprises a reagent container, wherein the reagent container is connected with a container distributor; the container distributor extends out to form liquid discharge pipes; the liquid discharge pipes are connected with a plurality of extracting centrifugal pipes; each extracting centrifugal pipe is connected with an impurity-removing centrifugal pipe through a first guide pipe; the preprocessing all-in-one machine further comprises pulverizers and an inner sucking pump; the pulverizers pulverize samples in the extracting centrifugal pipes; the inner sucking pump pumps a supernatant liquor in the centrifugal pipes into the impurity-removing centrifugal pipes; the impurity removing centrifugal pipes are connected with filters through second guide pipes; the supernatant liquor in the impurity removing centrifugal pipes is pressurized by a pressure pump and enters sample introduction containers through the filters. The preprocessing all-in-one machine combines the process of sample pulverization, liquid adding, extraction, centrifugal separation and solid phase extraction into one, saves time, simplifies operation and steps, reduces errors, and is efficient and high in safety.

The invention relates to a typhoon forecasting method and system, a readable storage medium and equipment, and belongs to the technical field of weather. Global forecasting data of a preset time pointis acquired, a vortex recognition system is mainly adopted for recognizing the global forecasting data and can recognize a vortex structure formed by typhoon, and typhoon path information and intensity information of the global forecasting data can be recognized within a shorter time to achieve typhoon forecasting. According to the method, the vortex recognition system can firstly recognize the typhoon and then acquire typhoon data, compared with a traditional mesoscale numerical forecasting mode, calculation amount of weather forecasting is greatly reduced, the processing time of typhoon forecasting in the earlier stage is greatly shortened, releasing of typhoon forecasting can be accelerated, the global forecasting data of higher accuracy can be fully utilized as far as possible, and the accuracy of typhoon forecasting is improved.

The invention relates to a method and a system for space-efficient multi-pattern matching. Firstly, a novel data structure HashTrie for storing pattern string is proposed, in which an original pattern string matrix is stored in the form of one-dimensional table by using a bit vector table, thus avoiding the problem of state transition matrix of conventional method memory automations; resolving the special bit vector table by using the method of recursive Hash function so as to save memory space; in the process of calculating the Hash function, converting the Hash function into a simple and efficient bit operation by using bit operation; the adoption the Rank technology in HashTrie construction and key word searching increases space and time efficiency of search. The method and system herein markedly reduce memory overhead and pretreatment time, can meet the need of timelessness as required by a real-time intrusion detection system as for when rules come into effect, and is more suitable for handling multi-pattern real-time matching which features in comparatively large scale of pattern string collection and comparatively short length of pattern string.

The invention discloses a graphite boat pretreatment method. According to the invention, washed graphite boat is bake-dried; the dried graphite boat is directly subjected to pre-deposition, such that a graphite boat with silicon nitride deposited on the surface is obtained. According to the graphite boat pretreatment provided by the embodiment of the invention, the graphite boat is not needed to be inserted with a silicon chip before graphite boat pre-deposition, such that graphite boat pretreatment time is reduced, and graphite boat pretreatment cost is reduced.

The invention discloses a pretreatment method used for measuring water body nitrogen and oxygen isotopes via chemical conversion. The pretreatment method comprises following steps: (1) water samples to be measured are delivered into a reduction column filled with copper plated cadmium granules, and then an eluant is delivered into the reduction column for elution; (2) a nitrite nitrogen solution is injected into a headspace bottle, the headspace bottle is vacuumized, high-pure helium is injected, an acetic acid-sodium azide mixed solution is injected for reaction, and at last, a sodium hydroxide solution is added so as to stop reaction. According to the pretreatment method, pretreatment time is shortened to 25min, and no azoimide leakage is caused in pretreatment processes, so that safety and utilizability of the pretreatment method are increased further. Standard curve fitting coefficients of the pretreatment method are all higher than 0.999, and nitrogen and oxygen isotope repeated experiment result error of a same sample is lower than 0.0002.

The invention discloses a functionalized Fe3O4 nano-particle and a preparation method and application of the functionalized Fe3O4 nano-particle. The preparation method comprises the following steps of: (1) under inert atmosphere, adding FeCl2 and FeCl3 into the mixed solution of sodium hydroxide aqueous solution and hydrochloric acid solution for reaction to obtain Fe3O4 nano-particles; and (2) reacting carboxymethyl-alpha-cyclodextrin with Fe3O4 nano-particles in PBS (Phosphate Buffer Solution), thereby obtaining the functionalized Fe3O4 nano-particles. The Fe3O4 nano-particle modified by alpha-cyclodextrin provided by the invention can simultaneously have good enrichment and purification abilities to trace phenylarsonic acid in complex samples; and meanwhile, the Fe3O4 nano-particle is superparamagnetic, so that centrifugation is not needed in sample processing, the pretreatment procedures of the sample are greatly simplified, the pretreatment time is shortened, and the pretreatment efficiency of the sample is improved.

The invention relates to the technical field of medicine residue detection. An objective is to provide a method for fast detecting the residual quantity of 34 illegally-added medicines in a weight-losing health food. The method is fast and accurate, and is high in sensitivity and wide in application range. According to the technical scheme, the method comprises: 1) preparing a self-made extractedliquid, which comprises refluxing a mixture of methanol, acetone and octanol polyoxyethylene ether at 60-65 DEG C for 30 min and performing cooling for later use; 2) taking health product tablets, capsules or particles, performing pulverization, accurately weighing 3-10 g of the sample, putting the sample in a centrifuge tube provided with a plug, adding 20-60 mL of a self-made extracted liquid, performing mixing in a vortex oscillator, performing supersonic wave extraction for 2-10 min, performing centrifugation, taking 1 mL of the supernatant out, blow-drying the supernatant, and redissolving the obtained product with 2 mL of 50% of an acetonitrile aqueous solution; and 3) filtering the redissolved solution via a filter membrane with the micropore size being 0.22 mum, and measuring the filtrate via HPLC-MS / MS (that is high performance liquid chromatography and mass spectrum and secondary mass spectrum).

The invention relates to a method for detecting content of 3-monochloropropanol-1, 2-diol (3-MCPD) ester in edible oil. The method comprises the following steps: preprocessing a sample, carrying out acid-catalytic ester exchange, salting out, extracting, purifying, carrying out derivatization and detecting. According to the method, the internal labeling of stable isotopes is adopted, and the acid-catalytic ester exchanging is combined with the derivatization of heptafluorobutyrylimidazole to indirectly quantitatively analyze 3-MCPD ester by utilizing a single four-level lever GC-MS, so that the preprocessing time is shortened, the analysis efficiency is improved, the consumption amount of an organic solvent is greatly reduced, the environmental pollution is avoided, meanwhile, the analysis cost is also reduced, after the derivatization of heptafluorobutyrylimidazole, the information of a sample mass spectrum fragment is rich, and a gas chromatograph-mass spectrometer is hardly polluted.

The invention relates to a wire-powder-gas-arc coaxial 3D printing device. The device comprises a gas shield welding gun and a coaxial gas-powder conveying device; and the gas shield welding gun is a consumable electrode. The coaxial gas-powder conveying device includes a powder feeding device, a gas feeding device and a coaxial spiral gas-powder cover. The coaxial gas-powder conveying device is a multi-channel structure; and each channel is provided with a powder feeding speed adjuster and a gas feeding flow meter. A spiral gas-powder groove is bored in the inner wall of the coaxial spiral gas-powder cover, and can be a spiral variable-pitch variable-section variable-multi-spiral structure. The device is used for performing 3D printing, can realize real-time control of powder adding speed, and is suitable for added material manufacturing of conventional metal products, gradient materials and composite materials; and obtained products are uniform in component, short in processing and low in subsequent processing amount.

The invention discloses a method for measuring residual maleic hydrazide in a tobacco or a tobacco product, which mainly comprises the following steps of: heating a sample for reflux extraction by using hydrochloric acid solution; performing purification by using a small C18 solid phase extraction column; performing eluation by using sodium hydroxide solution to obtain sample solution; and measuring the residual maleic hydrazide in the sample by using a high-efficiency liquid chromatography and adopting an external standard method. The method for measuring the residual maleic hydrazide in thetobacco or the tobacco product adopts a sample pretreatment method combining liquid-phase extraction and solid-phase extraction to not only shorten the pretreatment time of the sample but also improve the measuring accuracy; the measuring method has the advantages of high sensibility, high repeatability and wide detection range, the average recovery rate is 99 percent, and the detection range is between 0.1 and 80 mu g / ml; besides, the method is simple and quick to operate, has high degree of automation, and is easy for popularization and application.

The invention discloses a working electrode for an electrochemical onsite surface enhanced Raman scattering (SERS) spectrum in-situ cell, a preparation method of the working electrode and an in-situ cell using the working electrode. The electrode comprises an indium tin oxide (ITO) glass substrate which is silanized and assembled with nanoscale Au or Ag particles orderly. The working electrode disclosed by the invention breaks through the limitation that only gold and sliver rod-shaped metal electrodes are used as the working electrodes in the traditional electrochemical onsite SERS spectrum in-situ cell, and can be used for effectively solving a long-standing puzzle that the reproducibility and stability of an SERS spectrum are poor; in addition, the working electrode disclosed by the invention has the advantages of convenience in purchasing process materials, easiness for processing, convenience in use and operation, wide applicable object range, strong SERS spectrum signal, and good stability and reproducibility; and the preprocessing time of the working electrode can be effectively reduced and fussy repetitive experimental works are avoided, therefore the efficiency of study works and the accuracy and reliability of work achievements are greatly improved.

The invention provides a rapid detection method for water-soluble azo dyes in foods. The method comprises the steps of (A), sample extraction; (B), polyamide column concentration and purification; (C), elution of pigments; and (D) qualitative detection. According to the rapid detection method, the rapid screening can be timely and effectively carried out on suspected samples, the method is independent of large-scale instruments and equipments, and lawbreakers can be harshly attacked within the shortest time; and besides, the rapid detection method further has the advantages of short detection time, wide applicable range, high detection accuracy, low detection limit, strong anti-interference capacity and the like.

The invention provides a three-dimensional geographic data-oriented transmission and rendering method and system, and the method comprises the following steps: obtaining to-be-rendered three-dimensional geographic data, and building the three-dimensional geographic data into a group of scene trees with different display hierarchies of model entities of all nodes from the top to the bottom througha multi-detail level division method, wherein each node in the scene tree comprises a description file and a data file; obtaining a hierarchy switching factor of the current three-dimensional geographic data to be rendered; sequentially loading the hierarchical data corresponding to the hierarchical switching factors from the uppermost side to the acquired side in the scene tree, and rendering theloaded hierarchical data. The three-dimensional data organization form provided by the invention meets the expression of multi-source three-dimensional data types, supports model objectification andmonomerization, and attaches attributes, so the file transmission efficiency is improved, and the data processing efficiency during rendering is improved.