45results about How to "Rigorous theory" patented technology

The invention discloses a 3D pavement generation method applicable to a virtual prototype system. The method comprises the following steps: the first step, establishing a 3D random pavement elevation model of a fast Fourier transform (FFT) algorithm based on a single-point FFT pavement roughness random excitation time domain model; the second step, programming a general program of the FFT 3D pavement model in MATLAB software, and selecting the pavement of a specific level to simulate the pavement roughness according to needs, thus obtaining coordinate data of the 3D pavement; the third step, establishing a generalized pavement file which is applicable to common multibody dynamics software: establishing a general model which generates the 3D pavement file and comprises the node generation and the unit generation algorithm, thus compiling the coordinate data of the 3D pavement obtained in the second step into a pavement file that can be identified by virtual prototype simulation software; and the fourth step, performing virtual prototype modeling simulation. The method has faster computation speed of the 3D FFT model, and is more suitable to the research requirements of multi-dimensional complicated systems, real-time systems and the like.

The invention discloses a high-precision baseline resolving method by use of multisystem GNSS observed values. First of all, inter-station single-difference observed values are constructed by performing subtraction between stations at the two sides of a baseline on a pseudo range and a carrier wave phase observed value of each frequency of each GNSS system, afterwards, the rank defect problem of a normal equation is solved by taking a pseudo range hardware delay of a certain type of observed values as a reference, influences of a combined UPD are removed by performing estimation processing on floating point single-difference fuzziness according to the property of each GNSS system, an integer cycle characteristic of the single-difference fuzziness is recovered, and thus high-precision resolving of the baseline is realized. According to the invention, the defects existing in a conventional multisystem GNSS baseline resolving method are solved, and the method has the advantages of rigorous theory, simple model, easy realization, high expandability, high precision and the like, thereby being applied to multiple fields such as geological disaster monitoring, structure object deformation monitoring, precision navigation and the like.

The invention discloses a real-time monitoring rapid initialization method for a bridge based on GNSS, and the method comprises the steps: S100, constructing a double-difference observation equation on the respective frequencies of a Beidou tri-frequency signal; S200, linearizing the double-difference observation equation and constructing an error equation; S300, applying reference constraint on ato-be-estimated parameter through prior information, and weighting the double-difference observation equation through a random mode; S400, solving an error equation through a Kalman filter method, and obtaining a floating point solution estimation value of an ambiguity parameter; S500, carrying out the ambiguity search through an LAMBDA method based on a monitoring station coordinate estimation value and the floating point solution estimation value; S600, repeatedly executing the steps S400-S500 for the next epoch. According to the short baseline data processing characteristics of bridge deformation monitoring, the method employs the Beidou tri-frequency signal for building a superwide-band combined observation value with the wavelength of 4.88m, greatly improves the ambiguity fixing efficiency, and speeds up the initialization process in the real-time monitoring of the bridge.

The invention discloses a method for measuring distortion of a tall chimney based on an outline, which comprises the following steps of: (A) capturing the outline of the chimney by using a total station with a digital camera, and ensuring overlapping of two adjacently captured photos for the same outline of the chimney in a vertical direction; (B) quickly extracting the chimney outline in an image; (C) calculating an initial value of a chimney center; (D) selecting the most appropriate photo projected by a space section circle of a given height according to the initial value of the chimney center and known station coordinates; and (E) acquiring the initial value of iterative computation and carrying out the iterative computation on coordinates of the center of a circle and a radius of the space section circle. By the method, horizontal displacement monitoring for the chimney can be quickly realized, the precision is high, and the condition whether the method satisfies requirements or not can be judged through the circumstance whether the coordinates of the center of the circle and the radius of each section circle of the chimney can be quickly measured or not.

The invention discloses a GNSS single frequency data cycle slip detection and repair method based on ambiguity total differential. The method comprises steps that an ambiguity function is constructedbased on a GNSS inter-station single difference observation equation; based on GNSS inter-station single-difference carrier phase observation values of two adjacent epochs, the total differential of the ambiguity function is solved in the time domain, and the total differential function is the cycle slip quantity function corresponding to the epoch k; based on the cycle slip quantity function, thecycle slip detection least squares system is constructed, and cycle slip is detected based on standard deviation change of the least squares system; when the cycle slip is detected, the GNSS inter-station single-difference carrier phase observation values of all the common-view satellites and theoretical values are utilized to repair cycle slip. The method is advantaged in that a problem of difficulty in reliably processing complex carrier motion rules and relatively small cycle slip values existing in a single frequency GNSS cycle slip detection and repair method in the prior art is solved,properties of rigorous theory, simple model, easy realization, strong expansibility and high precision are realized, and the method can be widely applied to GNSS large-scale markets.

This invention relates to one complex mixture control structure flow SVA value analogue method, which comprises the following steps: simulating the complex mixture control structure by drainage structure and adopting rough network unit to form limit element module; describing the latent overflow boundary and engine mixture control structure boundary as Signorrini compensation condition to solve boundary overflow point accurately positioning problem; by self-adapting penal Heaviside function to solve the position problem of the overflow free page.

The invention discloses an outer tube depth drawdown double-tube method for determining hydrogeological parameters of aquitard of an outer tube on site. The method comprises the following steps: firstly, based on a double-tube test model, deriving the analytical solution of a flow formula of unit horizontal area of aquitard of the outer tube under the condition of reducing the certain constant of a water head on one side of the aquitard column body of the outer tube and keeping the underground water level of the inner tube unchanged; and then giving out experimental information along with time change based on pumping flow, and determining the conduction coefficient, permeation coefficient and water storage rate of the aquitard of the outer tube by adopting a wiring method. According to the double-tube method, the operation is easy, more parameters can be acquired, the precision is high, the key technical problem that the hydrogeological parameters of aquitard on site cannot be determined can be solved, and the testing error in a laboratory after on-site sampling can be overcome; and the outer tube depth drawdown double-tube method has a good popularization and application value.

The invention discloses an automatic registration method for panchromatic images and multispectral images of a Gaofen-7 satellite, which comprises the following steps of: S1, acquiring geometric imaging model parameters of the panchromatic images and the multispectral images in various wave bands, and constructing geometric imaging models of the panchromatic images and the multispectral images in various wave bands; S2, constructing a unified virtual CCD geometric imaging model of the panchromatic image and the multispectral image of each wave band by using geometric imaging model parameters of the panchromatic image and the multispectral image of each wave band; and S3, generating a strictly registered panchromatic image and a strictly registered multispectral image based on a unified virtual CCD geometric imaging model of the panchromatic image and the multispectral image of each wave band. The method has the advantages that the registration problem of the panchromatic image and the multispectral image of the Gaofen-7 satellite can be effectively solved, and automatic registration of the two images is realized by constructing a virtual unified CCD in sensor correction processing.

The invention provides a method for establishing an object and image correlation factor for endoscope measurement and applications thereof in endoscope measurement. The method comprises the following steps: firstly giving at least one plane reference object, wherein the reference object comprises at least one straight line which passes through the center and is equal in distance between two ends; measuring one straight line as the reference line, wherein the length is recoded as 1; aligning an endoscope lens with the center of the reference object; completely displaying an distorted image corresponding to the reference object on a computer screen connected with the endoscope; measuring the distance between the endoscope lens and the plane of the reference object perpendicular to the endoscope lens, and recording the distance as h; measuring the length of a distorted central line in the image which is displayed on the computer screen and which corresponds to the reference line of the reference object, and recording the length as s; calculating an object and image correlation factor f; measuring the size of the nidus displayed on the computer screen using the endoscope; and calculating out the actual size of the nidus directly according to the relationship of the object and the image indicated by the object and image correlation factor. The method is strict in principle, convenient in operation and accurate in result and has a strong application value and potential commercial value.

The invention discloses a method for calculating coordinates at any stake mark on a route. The method comprises the following steps of: judging an intersection interval and a line shape of a point P according to design route information and a stake mark sn at the point P; calculating the line coordinate of the P point by using a numerical integration method according to the linear information of the P point; and calculating the control coordinate of the side pile according to the coordinate of the P point. According to the integral relation between the curvature and the mileage, the calculation general formula of the edge pile in the line is deduced, then the calculation models of all the line elements are the same by utilizing the numerical calculation method of the integral, and different calculation methods do not need to be selected according to the difference of the line elements; according to the calculation method provided by the invention, the calculation result is the same coordinate in the line control coordinate system, and secondary coordinate conversion is not needed; the calculation method provided by the invention is rigorous in theory, simple in formula and convenient for programming implementation.

The invention discloses an inner tube drawdown double-tube method for determining the outer tube aquiclude hydrogeological parameter in site. According to the method, firstly, an inner tube drawdown double-tube test model with the determined outer tube aquiclude hydrogeological parameter is formed in site; on the basis of the double-tube test model, a flow rate formula analytic solution of the outer tube aquiclude unit level area under the conditions that an inner tube water head is reduced by a certain constant (the water level is not lower than the top surface of the aquiclude) but the underground water level at one side of an outer tube aquiclude post body keeps unchanged is deduced; then, experiment data based on measurement of the change of the flow rate of a Marriotte bottle at the upper part of the outer tube along with time is given; a wire fitting method is used for determining the aquiclude conduction coefficient, the seepage coefficient and the water storage rate. The method provided by the invention has the advantages that the operation is easy; the obtained parameters are many; the precision is high; the technical problem that the aquiclude hydrogeological parameter cannot be determined in situ in site in the prior art is solved; the defect of errors during test in laboratories after the sampling in site is overcome; good popularization and application values are realized.

The invention discloses an in-situ double-tube outer tube method for determining an aquitard consolidation coefficient and a deformation lagging index. The method comprises: firstly, forming a double-tube test model for determining the aquitard consolidation coefficient and the deformation lagging index by using the double-tube outer tube method on the scene, deriving to reduce by a certain constant at an inner tube water head on the basis of the double-tube test model, and obtaining an analytic solution by using a settlement formula for outer tube aquitard under the condition that the underground water level remains unchanged at one side of an outer tube aquitard column; secondly, determining the aquitard consolidation coefficient and the deformation lagging index by using a fitting curve method according to experimental data about time-varying outer tube aquitard settlement measured on the basis of a dial indicator arranged in the outer tube aquitard. The method has the advantages that: a derived analytic solution theory is precise; in-situ test for the aquitard consolidation coefficient and the deformation lagging index is realized, and a testing device and a testing process are simple and easy to operate; the water release rate, the consolidation coefficient, the deformation lagging index, the conductivity coefficient and the permeability coefficient of the aquitard can be obtained simultaneously, and more parameters are obtained.

The invention discloses a double-tube inner tube method for determining a consolidation coefficient and a deformation hysteresis index of an aquitard in situ. Firstly, a double-tube test model for determining the consolidation coefficient and the deformation hysteresis index of the aquitard by adopting the double-tube inner tube method is formed on site; based on the double-tube test model, a settling volume formula analytic solution of an inner tube aquitard under the conditions that a water head of an outer tube is reduced by a certain constant and an underground water level of one side of a cylinder of the inner tube aquitard is kept unchanged is derived; secondly, according to experimental data that a settling volume of the aquitard in an inner tube is changed along with time, which is measured on the basis of a dial indicator arranged in the inner tube aquitard, the consolidation coefficient and the deformation hysteresis index of the aquitard are determined by adopting a curve fitting method. The double-tube inner tube method disclosed by the invention has the following advantages that the derived analytic solution is strict in theory; in-situ testing on the consolidation coefficient and the deformation hysteresis index of the aquitard is implemented; a testing apparatus and a testing process are simple and easy for operation; a water releasing rate, the consolidation coefficient, the deformation hysteresis index, a conductivity coefficient and a permeability coefficient of the aquitard can be simultaneously obtained, and multiple parameters are acquired.

The invention discloses a test device and method for determining dislocation interface seepage failure hydraulic gradient through unidirectional flow in-situ test. The disadvantage in the existing technical scheme of determining the dislocation interface seepage failure hydraulic gradient is overcome, and a method for determining the dislocation interface seepage failure hydraulic gradient according to an unstable slow formula analytic solution in the dislocation interface under a ladder boundary water level condition based on the unidirectional flow in-situ test device. The device comprises awater inlet bin, a water outlet bin, a piezometric tube, a pressure instrument and a water injection pressurizing device. The method comprises the following steps: selecting an appropriate test pointin field adit to form an in-situ test sample; developing the field test, recording the flow data and the failure omen time; acquiring dislocation interface seepage parameter based on the test data; and computing the dislocation interface seepage failure hydraulic gradient.