78 results about "Orthogonal method" patented technology

The invention discloses a full-wave nuclear magnetic resonance signal denoising method based on independent component analysis. The full-wave nuclear magnetic resonance signal denoising method is mainly used for power frequency harmonic interference or certain single-frequency interference in full-wave nuclear magnetic resonance signals. The method comprises the steps that firstly, utilizing a nuclear magnetic resonance sounding water detecting instrument for collecting MRS signals, obtaining the frequency of power frequency harmonic interference or certain single-frequency interference contained in the collected signals through spectral analysis, and adopting a digital orthogonal method for constructing input channel signals to solve the underdetermined blind source separation problem; then, using the constructed input channel signals and the collected MRS signals as input signals for conducting independent component analysis to obtain separated MRS signals; finally, adopting the spectrum correcting method for solving the problem that the separated MRS signals have uncertain amplitude, and then extracting denoised MRS signals. According to the full-wave nuclear magnetic resonance signal denoising method, the problem of the underdetermined blind source and the problem of the uncertain amplitude usually existing in independent component analysis are solved, the power frequency harmonic interference or the certain single-frequency interference in the noised MRS signals is effectively filtered out, and compared with a traditional MRS signal denoising method, the full-wave nuclear magnetic resonance signal denoising method has the advantages of being high in arithmetic speed, high in signal to noise ratio, high in practicability and the like.

The invention relates to the field of optical thin film spectrum test, and in particular relates to a method for accurately calibrating the optical constant of the visible light waveband of an optical thin film. Particularly, the invention provides an optical coefficient measurement method of the visible light waveband of the thin film, and particularly relates to a method for accurately calibrating the optical constant of the visible light waveband of silicon dioxide thin film material; the method is simple and convenient, and is capable of unifying the physical meaning and mathematical meaning of the constant test of the optical thin film. The method has wide application value in the aspect of accurately calibrating the optical constant of the thin film. Particularly, the invention relates to the accurate calibration of the optical constant of the thin film material; on the basis of elliptic polarization spectrum inversion optical constant, the consequences of physical models of the thin film can be arranged by an orthogonal method, the sequence of the application of the physical models of the thin film can be obtained by mathematical statistics, and finally the physical meaning and mathematical meaning of the final given optical constant calculated result are unified.

The invention relates to a method for preparing TiO2 catalyst on the surface carrier of three-dimension beehive ceramic network, wherein it uses orthogonal method to prepare the titanic acid gel and the titanic acid gel with silver, iron, or lanthanum ion; uses dichroite beehive cermai and beehive ceramic as carrier; using gel-sol method to carry the titanic acid gel on the carrier. The load amount of optical catalyst film on the ceramic carrier is 0.21mg/cm2; the TiO2 diameter is 15-20nm; the thickness of load film is 300-400nm; when using it to purify the formaldehyde, and the initial density is 0.42-0.49mg/m3, the formaldehyde density will be lower than 72.2-74% after seven hours; when using it to disinfect, and the initial virus density is 554-924cfu/m3, the virus number is reduced 67.0-75.9% after 14.5h.

The invention discloses a composition modeling method for a combustion system based on numerical simulation and test operation data, which belongs to the technical field of composition modeling during combustion of a utility boiler combustion system. The method comprises the following steps: a numerical simulation model of a target coal-powder boiler is built by adopting the three dimensional steady-state condition; according to a target model built by the LS-SVM, firstly applicable input variables are determined, and the value range of each input variable is determined; by utilizing the given sampled data group count of the orthogonal method and the value of each input variable, a variable list and testing data are obtained and the mechanism LS-SVM model is established; the LS-SVM model is updated according to the real-time data of the power plant. The method overcomes the defect that the data is single during the modeling of simple test data, updates the model by utilizing the data updated by the power plant in real time, effectively improves the precision of the LS-SVM model, and lays a foundation for optimization of the boiler combustion.

The invention discloses a gray model (GM) (1,1) prediction method of orthogonal interpolation based on Markov chain. According to the grey orthogonal method and the principle of the Markov chain, the Gauss-Chebyshev orthogonal thought is used to predict overall trend of time-series data. Accuracy of the prediction is time-varying, the principle of the Markov chain has good advantages during the process of processing a time-varying system, and choosing the GM (1,1) prediction method of the orthogonal interpolation based on the Markov chain can solve the instability of the prediction result better, and therefore the grey Markov orthogonal model is put forward for the prediction of data of electricity consumption, and is suitable for a dynamic prediction process which is of a short-middle term, low in demanded quantity of data and large in data amplitude. The GM (1,1) prediction method of the orthogonal interpolation based on the Markov chain is scientific in inventive concept, simple to calculate, small in work load, and high in prediction accuracy, and good in usage value and wide in application range in the technical field of prediction.

The present invention relates to an instantaneous frequency extraction method of Doppler signals, and belongs to the signal processing technology field. According to the present invention, for the Doppler signals outputted by various interference velocimeters, firstly the appropriate parameters, such as the wavelet, the threshold type, the decomposition layer number, the vanishing moment, etc., are selected to carry out the wavelet de-noising on the output signals to smooth the edges; after then the amplitude modulation-frequency modulation decomposition is carried out on the de-noised signals in an iteration manner, and the envelopes of the signals are extracted and are normalized; and finally, the instantaneous frequencies of the normalized signals are extracted by a direct orthogonal method, and an estimation curve of the instantaneous frequencies is obtained in a least-square fitting manner. According to the present invention, firstly the signals are de-noised, so that the direct orthogonal method which is more sensitive to the noise originally can be applied to the Doppler signals, and the simulation results show that on the condition of selecting the appropriate parameters, an error of an instantaneous frequency value obtained by the present invention and a theoretical value is less than 0.5%, the calculation time and the sampling point number are positively related, and the calculation velocity is faster.

The invention discloses a robust automobile body material matching method based on a multi-objective continuous orthogonal method. The method mainly comprises the following steps: creating a collision finite element model through actual collision states and conditions; and then, determining an optimization target, constraint conditions and design variables to be optimized, and creating a three-level orthogonal table; obtaining target response values through numerical simulation calculation, calculating target signal to noise ratios and obtaining correction response values; and finally, reasonably selecting an optimal solution through the determined comprehensive evaluation value, judging the designed target satisfies an iteration judging condition, if not, using the current optimal solution as the initial solution of the next iteration step until the iteration judging condition is satisfied. According to the invention, automobile body design can be further guided reasonably, and the automobile safety performance and lightweight design level are improved.

The invention relates to an orthogonal decoupling correction method for a theodolite orientation correction model. Aiming at the problems that a solved coefficient cannot represent the real size of each item and the model is low in stability because strong correlation exists in each primary function in the theodolite orientation correction model, the model is decoupled by using an orthogonal method, and the correlation between the primary functions is eliminated, so that a novel orthogonal orientation correction model is established, and a novel model coefficient can be deduced by using the original model coefficient. The method has the beneficial effects that coupling among items of the orientation correction model of any item can be removed, and the model is relatively stable under the condition that the primary functions are not reduced. Moreover, the true level of each error item can be reflected, so that the extrapolation of the model is possible.

The invention discloses an acquisition method of a parameter domain of an anti-fatigue grinding technology of an ultrahigh-strength steel member. The acquisition method comprises the following steps: step 1, establishing a parameter domain C1 of a grinding technology of the ultrahigh-strength steel member; machining a plurality of first testing members according to the C1, and obtaining a parameter domain C2 of the grinding technology of the ultrahigh-strength steel member according to a parameter and surface roughness relation curve; step 2, carrying out an orthogonal test according to the C2 in the step 1, machining a plurality of second testing members and establishing a first relational expression; step 3, machining according to the C2 to obtain a plurality of groups of third testing members and measuring a plurality of groups of surface roughness values, surface microhardness values, surface residual stress values and fatigue life values and establishing a second relational expression; step 4, obtaining a parameter domain C3 of the anti-fatigue grinding technology of the ultrahigh-strength steel member according to the first relational expression in the step 2 and the second relational expression in the step 3. According to the acquisition method disclosed by the invention, a single-factor method and an orthogonal method are used for carrying out test design, and designing and analyzing methods are reliable.

The invention discloses a mining method of a short- and long-wall portion of under-village coal, comprising steps: determining a face mining width extremum according to rock formation properties of a mining site in connection with face mining equipment supporting to obtain a face mining width range; determining an extremum of strip pillar reserved width between faces according to overlying stratum depth and overlying rock lithological conditions in connection with Wilson's theory, thus obtaining a strip pillar reserved width range; pairing face mining width and pillar reversed width by using an orthogonal method according to the face mining width range and isolation pillar reserved width range to form multiple schemes, and subjecting each scheme to pillar stability check and mining subsidence prediction to select optimal schemes; determining a mining sequence of strip multiple faces according to the principle of mining an area right under a building prior to lateral mining; the method has high operating efficiency, low cost and environmental friendliness.

The invention discloses a method and a device for simulating the influence of an external insulation electric field of a transformer bushing. The method comprises the following steps: determining a plurality of variables of an environmental factor and a horizontal value thereof; according to the variables and their horizontal values, a plurality of combinations of working conditions being determined by orthogonal method; calculating a range of the electric field strength along the surface path of the umbrella skirt and a range of the electric field strength along the air gap path of the umbrella skirt according to the calculated electric field strength along the surface path of the umbrella skirt and the electric field strength along the air gap path of the umbrella skirt; according to thecalculated range difference of the two electric field intensities, the influence result of the external insulation electric field of the transformer bushing being calculated. By using orthogonal method to combine the dry variables of environmental factors and their horizontal values, the simulation data are reduced and the calculation process is simplified. At the same time, the influence degreeof different environmental factors on the external insulation electric field of transformer bushing can be obtained.

The invention relates to a method for determining salt-sensitivity period for salt tolerance of peanuts. The method comprises the following steps: (1) planting of the peanuts; (2) measurement of soil water content, soil moisture absorption water content and field water-holding capacity; (3) determination of soil salt content gradient, namely setting four salt stress concentrations of 0, 0.15%, 0.30% and 0.45% to analyze pure NaC1 preparation; (4) salt stress operation in growth stage, namely performing experiments of three factors of peanut variety, processing period and concentration by using an orthogonal method, carrying out salt stress operation in peanut germination stage, seedling stage, floricome stage and podding stage, and repeating the experiment for 6 times via random arrangement; (5) processing of experiment samples; and (6) experiment data processing and result analysis, namely determining the influences, caused by the salt stress in different growth periods, on the peanut form and biomass. According to the method, the production risk of the peanuts at the saline-alkali soil can be greatly reduced, the agricultural planting structure of the saline-alkali soil areas is optimized, the economic benefit and the social benefit of the agricultural production are improved, relatively high operability and raw material reutilization property are provided and the production cost is reduced.

The invention discloses a welding gun space attitude recognition method based on an arc sensor. The welding gun space attitude recognition method based on the arc sensor is used for automatically recognizing the welding gun space attitude of a complex trajectory weld joint. A system used by the method scans weld grooves through the arc sensor, an arc sensing signal for reflecting the distance change of a welding gun relative to the workpiece weld joint in the weld groove scanning area is collected, the arc sensing signal is filtered and treated and is converted into a welding gun height signal, the deflection angle of the welding gun relative to the workpiece weld joint is recognized through an even harmonic feature phase method according to the influence features of different welding gun space attitudes and interference noise to the welding gun height signal, the pitch angle of the welding gun relative to the workpiece weld joint is recognized through one time of harmonic feature vector orthogonal method, and the roll angle of the welding gun relative to the workpiece weld joint is recognized through multiple times of harmonic feature vector cross coupling algorithms. The method can accurately recognize the different welding gun space attitudes, can be used for automatic deviation rectification and correction of welding guns in automatic welding and robot welding, and is the important guarantee for achieving intelligent and flexible welding.

The invention discloses a wide-channel plate type heat exchanger and a heat exchanger particle swarm optimization structure design method, and belongs to the technical field of heat exchanger design.Six variables of a trapezoid boss on the surface of a single-layer heat exchange plate are extracted for forming structure parameters, and the design range is determined; an orthogonal method is adopted, and 25 sets of typical heat exchanger plates with different structures and operation conditions are generated; through Soliworks, the single-layer heat exchange plate is generated, and on the basis of Fluent numerical simulation software, a heat exchange nusselt number and the pressure drop of the corresponding heat exchanger plate structure are obtained; according to the obtained sample set,a heat exchange nusselt number and pressure drop comprehensive criterion relation model of a heat exchanger plate is fitted; the maximum heat exchange nusselt number and the minimum pressure drop serve as optimization targets, particle swarm optimization is adopted, and optimizing is carried out to obtain the structural parameters of the optimal heat exchanger plate; and the heat exchanger has theadvantages that the heat exchanger is suitable for finding shape parameters obviously affecting flowing and heat exchange characteristics of the plate type heat exchanger, under the condition that core parameters are continuously distributed, the shape parameter distribution range with the best heat exchange effect and meanwhile the minimum pressure drop losses can be searched.

The invention belongs to the technical field of navigation and relates to a calibration method of an inertial navigation system with an inclined sensitive shaft. In the technical scheme, a normalized orthogonal method is employed to convert an inclined gyroscope and an inclined accelerometer sensitive shaft onto a projectile axis through a direction cosine matrix, so that a virtual gyroscope coordinate system and an accelerometer coordinate system and the real projectile coordinate system coincide together, thereby solving a problem of parameter identification of the inertial navigation system with the inclined sensitive shaft.

The invention provides a coherent demodulation implementation method for a short-wave single-sideband system. The coherent demodulation implementation method comprises the following steps of (1), performing SSB modulation of a sent signal at a sending end, converting the sent signal into a radio-frequency signal, and sending the radio-frequency signal into a receiving end; (2), performing filtering and down-conversion of the radio-frequency signal received by the receiving end to obtain a corresponding intermediate-frequency signal; (3), performing down-sampling of the received intermediate-frequency SSB signal with the sampling rate, which is two times of the intermediate frequency, performing 2-fold interpolation 0 of a down-sampled signal to obtain a sampled interpolated signal of the intermediate-frequency signal, and eliminating the orthogonal part of the SSB signal to obtain a DSB signal; (4), extracting a carrier phase from the DSB signal obtained by sampling interpolation by utilizing a same-phase orthogonal method, and recovering a local carrier; and (5), performing coherent demodulation of a recovered intermediate-frequency carrier. By means of the invention, the transmitting efficiency of the short-wave SSB system is increased; therefore, the SSB system can perform coherent demodulation rapidly and effectively; and furthermore, two communication parties still can communicate normally when the phase difference exists.

The present invention relates to a rotary machine holographic diagnostics method based on frequency modulation information reconstruction. The method is characterized by firstly installing two displacement sensors of which the included angle is 90 degrees on a rotor vibration test cross-section, acquiring the displacement vibration signals in the X and Y directions, carrying out the ensemble empirical mode decomposition (EEMD) on the displacement vibration signals, obtaining a plurality of intrinsic mode functions (IMF), then carrying out the spectral analysis on the IMFs, and selecting the IMF<x>(t) and the IMF<y>(t) which contain a rotating frequency; adopting a direct orthogonal method to calculate the instantaneous frequencies IF<x>(t) and the IF<y>(t) of the IMF<x>(t) and the IMF<y>(t) respectively, extracting the frequency, amplitude and phase information of the instantaneous frequencies IF<x>(t) and the IF<y>(t) to synthesize a two-dimensional holospectrum, and effectively identifying the operation state of a rotor. The rotary machine holographic diagnostics method based on frequency modulation information reconstruction of the present invention comprehensively considers the vibration signals of the rotor in the horizontal and vertical directions, fully utilizes the phase information, fuses the frequency, amplitude and phase information of the signals organically, and is visual and complete in diagnosis result.

The invention discloses a method for lily virus-free cultivation through using moroxydine drug, belonging to the fields of plant culture rapid propagation technique and biotechnology. The method comprises the steps of detecting lily seed balls virus, preparing culture medium, standby, sterilizing and vaccinating explants, culturing the explants and detecting tissue culture seedling virus, etc so as to obtain a large number of virus-free tissue culture seedlings quickly. The best induction culture medium formula that lilies are directly divided into sprouts and root-free tissue culture seedlings is obtained through an orthogonal method; the optimal virus-free concentration is screened through preparing a series of moroxydine antiviral drugs with concentration gradient; the virus-free efficiency can reach 91%; the induction culture period is shortened; the method has the characteristics of high virus-free efficiency and high enhancement factor, etc; and the method offers technological base to culture lily virus-free plants and popularize virus-free cultivation research.

The invention relates to a method for preparing an astragalus polysaccharide glucose-lowering capsule, which belongs to the method for preparing Chinese medicines. After repetition tests of refluxing extractive of coptis chinensis and astragalus ethanol and honeysuckle warm immersion alcohol settling conditions, the optimal extractive process of the preparation is determined through screening of an orthogonal method. Loss of effective constituents is effectively reduced in production and more impurities are removed. Compared with the prior art, clinical dose is reduced by 60%, bioavailabilityof the preparation is improved, and the purpose of reducing dose under the premise of the same curative effect is achieved.

The invention relates to a duck viral hepatitis (DVH) resisting astraglus polysaccharide phosphorylated molecular modification method, and belongs to the technical field of traditional Chinese veterinary medicine preparation. Different alcohol precipitation parts of astragalus polysaccharides are extracted, effective DVH-resisting astragalus polysaccharide parts are screened out through repeated clinical experiments, and then the optimal conditions for sodium tripolyphosphate-sodium trimetaphosphate method phosphorylated molecular modification of the astragalus polysaccharide effective parts are determined through an orthogonal method as the reaction temperature being 70 DEG C, the reaction time being 4 h and the pH being 8.5. The product obtained through infrared spectroscopic analysis is astragalus polysaccharide phosphate ester, the sugar content of astragalus polysaccharide phosphate ester reaches 36.87%, the phosphate radical content reaches 12.03%, and the yield of the product reaches 130.32%. The DHV-1 infected duct embryo liver cell resisting function and DVH curative effect of phosphate ester of the effective parts of astragalus polysaccharides are better than those of the effective parts of astragalus polysaccharides. The obtained phosphate ester of the effective parts of astragalus polysaccharides has high sugar and phosphate radical content and a high product yield, and a good curative effect on DVH is achieved.

The invention discloses a method for using a rimantadine hydrochloride drug to culture lily under a virus-free state and belongs to the fields of plant tissue culturing fast propagation technique and biologic technique. The method comprises the following steps of: inspecting lily mother bulb virus, preparing a culture medium and reserving, sterilizing and inoculating explants, culturing the explants, inspecting virus of tissue culturing seedlings, and the like, thereby quickly obtaining lots of tissue culturing seedlings. According to an orthogonal method, a formula of the best induced culture medium of buds and root-less tissue culturing seedlings directly differentiated from lily is obtained; a rimantadine hydrochloride antiviral drug with a series of concentration gradients is prepared and an optimum detoxifying concentration is selected, so that the detoxifying efficiency can reach 93%; a period of induced culturing is shortened, and meanwhile, the detoxifying efficiency is high and the enhancement factor is high; and a technical basis for researching on the culturing for lily virus-free plants and the popularization for virus-free culturing is provided.

The invention relates to a method for determining linear dispersion space-time codes when the receiving antenna number is less than the transmitting antenna number. Large limitation exists in the prior art. The method comprises the following steps of: firstly, determining channel using times T (T is not less than M) and constructing layered matrices C1-CN; then constructing N stepped matrices U1-UN in T*T; constructing q=NT encoding matrices Aj, K in M*T, wherein the j is equal to 1 to T, the k is equal to 1 to N, the M is the transmitting antenna number, the N is the receiving antenna number, Aj, k is equal to P.Ck.diag (Uk(:, j)).Q, NT encoding matrices Aj, k are obtained together, and then the linear dispersion space-time codes are determined. The method adopts a trace orthogonal method to achieve approximately optimal channel volume and uses an algebraic method to obtain full set gains. The linear dispersion space-time codes determined in the method of the invention have simple encoding design complexity and simultaneously provide favorable encoding properties.

The key distribution method is in use for lowering amount of calculation and consumption of transmission bandwidth, raising flexibility of system. Characters are that first, front end of system groups programs to turn into product, and using orthogonal method generates vectors and cipher keys for programs and products; next, the system assigns addresses for users, and groups users, using mask controls magnitude of group, and using RSA algorithm and China's residue theorem generate cipher key of product group; using feature of variable magnitude of group (controlled by mask), and based on characters of different products (different requirements of flexibility) define different magnitudes of groups. Thus, the method gives option and balanced selection between amount of calculation and transmission bandwidth in order to realize optimized matching effect.

The invention provides a method for adjusting a horn mouth of circle shears by applying an orthogonal method. The method comprises the following steps of: building a central line of a unit; leading two vertical lines from the central line; making an oscillating bar; fixing the oscillating bar at one side of a shear blade shaft of a left circle shear; fixing an inside micrometer at an upper end of a vertical rod of the oscillating bar; rotating the shear blade shaft of the circle shears to measure; reading and recording reading value of the inside micrometer; measuring the other side of the shear blade shaft of the circle shears and the shear blade shaft of another circle shear according to the steps; and comparing read and recorded reading values, if the reading value error of the inside micrometer is larger than a range, repeatedly measuring and adjusting until a standard error requirement is reached. By the method, a horn mouth state of two circle shears can be accurately and rapidly measured and adjusted, the problems of accurate measurement and accurate adjustment on the horn mouth state of a shear blade of a double-head circle shear are effectively solved, the shear blade is prevented from being damaged, the shearing edge quality is improved, and waste quantity and quality problem of products are reduced.