72 results about "Matrix solution" patented technology

The invention discloses a new error truncation-inverse finite element deformation reconstruction method based on sparse strain data, and relates to the technical field of structural deformation shape reconstruction. Through error truncation of a strain missing sampling area, a deformation hypothesis theory is introduced, lateral shear strain is ignored, a conversion matrix between an inverse finite element reconstruction solution and a real structure solution is established, a dummy deformation field function is substituted into a matrix relational expression between the inverse finite element reconstruction solution and the real structure solution, and the transformation matrix is obtained. Establishing a matrix solution equation between an inverse finite element reconstruction solution and a dummy deformation field function coefficient, directly solving according to input sparse strain data to obtain an optimal dummy deformation field function coefficient, and substituting the field function coefficient back into a dummy deformation field function to obtain real deformation of the structure; according to the new error truncation-inverse finite element deformation reconstruction method based on the sparse strain data, the matrix relation between the inverse finite element reconstruction solution and the real solution of the structure is constructed, the theoretical format is simple, and the applicability is high.

The invention relates to the technical field of polypeptide detection, and particularly discloses a method for determining the content of human epidermal growth factors in sodium hyaluronate composite gel. The method comprises the following steps: S1, carrying out enzymolysis on sodium hyaluronate in the sodium hyaluronate composite gel by using an enzyme to obtain a test solution; s2, measuring a blank matrix solution containing no human epidermal growth factors, and adding enzyme for enzymolysis to obtain a blank matrix solution; s3, measuring the human epidermal growth factor, and diluting the human epidermal growth factor with the blank matrix solution to obtain a reference substance solution; and S4, detecting the test solution and the reference solution by using a high performance liquid chromatography and an ultraviolet detector, and determining the content of the human epidermal growth factor by using an external standard method. According to the method, hyaluronidase is used for pre-treating the test sample, macromolecular and high-viscosity sodium hyaluronate is subjected to enzymolysis to form micromolecular sugar, the method is compatible with the same liquid chromatography separation system, the content of the human epidermal growth factors in the test sample is measured by adopting an HPLC (High Performance Liquid Chromatography) combined ultraviolet detector, and the method is high in specificity, high in accuracy, low in detection limit and good in repeatability.

The application discloses a preparation method of a PPSU-based ZIF-8 double-layer membrane and application of the double-layer membrane in hydrogen separation, and belongs to the technical field of gas separation membranes. The preparation method is as follows: ZIF-8 seeds are embedded in a PPSU matrix solution, then are spin-coated onto the surface of an alpha-Al2O3 carrier to obtain a PPSU-based membrane, and secondary growth of the membrane is carried out through a solvothermal reaction, so that the seeds grow epitaxially, a continuous, dense and defect-free ZIF-8 separation layer is formed on the surface and the near-surface region of the carrier substrate, and the reaction is ended to obtain the double-layer membrane. Through the seed embedding strategy, the interface bonding force between the ZIF-8 layer and the PPSU substrate is significantly enhanced, and the generation of interface defects is effectively inhibited. The double-layer membrane has high permeation flux and high separation selectivity for a H2 / CO2 system, and is particularly suitable for hydrogen separation and purification processes.

The application relates to the technical field of medical materials, and discloses a functionalized hydrogel for treating atopic dermatitis and a preparation method and application thereof, the preparation method comprising the following steps: taking g-C3N4 powder as raw material to prepare C3N4 gel with a three-dimensional network structure; taking g-C3N4 powder and CDs powder as raw material, adding a matrix solution, and uniformly ultrasonically dispersing; adding a crosslinking agent solution to make the solution fully undergo crosslinking reaction to prepare a CDs / g-C3N4 crosslinking solution; pouring the above-mentioned CDs / g-C3N4 crosslinking solution into the above-mentioned C3N4 gel, standing for gelation, forming a functionalized modified carbon nitride gel three-dimensional network structure, and freeze-drying to obtain a functionalized three-dimensional crosslinking hydrogel. The functionalized three-dimensional crosslinking hydrogel prepared by the application has the advantages of degradability and the ability to penetrate through an intact skin barrier; and can be used for treating atopic dermatitis.

The invention discloses a method for designing a mixed type boundary contour line of a progressive multi-focus ophthalmic lens, and belongs to the field of design of progressive multi-focus ophthalmic lenses. The method comprises the following steps: constructing a Laplacian equation, and selecting a mixed rectangular boundary as a boundary of the Laplacian equation; two nodes with adjustable positions are arranged on the right side edge of the second rectangular boundary; solving a Laplacian equation for the second rectangle by adopting a finite element method, and carrying out interpolation to obtain a contour line numerical matrix solution of the second rectangle; and combining the contour line numerical solutions of the first rectangle, the second rectangle and the third rectangle to obtain a contour line function numerical matrix solution of the hybrid rectangular region. According to the invention, the contour line mixed type boundary design method is utilized to greatly improve the use range of the far vision area and the near vision area of the ophthalmic lens again, reduce the astigmatism area and improve the optical performance of the lens; the contour line mixed type boundary design method provided by the invention can also be applied to the personalized design aspect of progressive multi-focus spectacle lenses.

The invention discloses a seismic source positioning method considering the influence of an abnormal value and a dynamic wave velocity, and the method comprises the steps: arranging sensors to detect sound waves emitted by a seismic source, and observing the time when the sound waves reach each sensor; subtracting the control equation established based on the reference sensor from the control equation established based on the measurement sensor, and carrying out linearization and matrix representation on a nonlinear equation line obtained by subtraction; the matrix is solved, an analytic solution enabling the sum of squares of the residual errors to be minimum is found, the obtained analytic solution is substituted into an overdetermined matrix equation to obtain a fitting model, and weight estimation is conducted according to the relation between the residual errors and weights; iteration is carried out between weight estimation and overdetermined matrix solving, after optimal weight estimation is obtained, overdetermined matrix solving is completed according to the optimal weight, and a final seismic source positioning result is obtained based on an analytical solution. According to the method, the technical problem that the influence of abnormal values and wave velocity measurement errors on the seismic source positioning precision in a complex engineering environment is large is solved, and the fault tolerance and the real-time performance of seismic source positioning are improved.

The invention discloses an environment-triggered memristor with a nonvolatile storage function and a preparation method thereof, and the method comprises the steps: 1, adding polymer matrix powder with a hydrophilic group into an acetic acid solution, stirring to obtain a polymer matrix solution, taking inorganic salt with a moisture absorption characteristic, adding the inorganic salt into the polymer matrix solution, carrying out ultrasonic treatment, and filtering to obtain a polymer matrix solution; a precursor solution is obtained; 2, cleaning and blow-drying the flexible PI film with the ITO conductive layer to obtain a clean substrate; 3, spin-coating the precursor solution on the surface of an ITO conducting layer of a clean substrate, airing and drying to form a high-salt doped polymer matrix layer on the surface of the ITO conducting layer; and 4, sequentially sputtering active metal and protective metal on the surface of the high-salt doped polymer matrix layer to respectively form an active metal layer and a metal protective layer, thereby obtaining the environment-triggered memristor with the nonvolatile storage function. According to the invention, the coupling of environment threshold sensing and nonvolatile storage is realized, and the environment adaptability and safety of the memristor are improved.

This invention relates to a kit for the quantitative detection of IGF-1 and its preparation and detection method. The kit includes calibrators, quality control materials, internal standard solution, immunoenrichment solution, dissociation solution, elution solution, mobile phase 1, and mobile phase 2. This invention enables fully automated top-down detection of intact IGF-1 protein, significantly improving sample processing efficiency. The matrix solution used in the kit preparation employs human serum with endogenous IGF-1 removed, maximally mimicking the in vivo environment and reducing detection bias caused by different matrix components. The elution buffer uses a formic acid-hydrochloric acid mixed acid-acetonitrile system. This system provides a mild ionization environment through formic acid, and the synergistic effect of hydrochloric acid in stabilizing the solution pH reduces ion inhibition effects, improves the IGF-1 response signal, and thus enhances the signal-to-noise ratio of the detection.

The application discloses a kind of matrix spraying parameter optimization method and system for mass spectrometry imaging, it is related to deep learning technical field, including: the optical image of the surface of tissue section is collected, is evenly divided into multiple grid units arranged according to row and column, optical reflectivity value is extracted, and optical reflectivity distribution diagram is constituted;Pretreatment is carried out and the hydrophilic-hydrophobic index of each grid unit is calculated;Spraying parameter prediction model outputs nozzle moving speed prediction value;Adjacent grid units in the same row and the difference of nozzle moving speed prediction value are within the preset tolerance range, and the grid units are merged into the same spraying area, the average value of the nozzle moving speed prediction value of all grid units is used as initial optimized nozzle moving speed;Optimized nozzle moving speed is obtained by correction, and the surface of tissue section is differentially sprayed with matrix solution.The technical problem that the present application solves is that the surface of the tissue is different in hydrophilic-hydrophobic, which leads to uneven spraying and low spatial resolution consistency of mass spectrometry imaging.

The invention discloses a self-adaptive self-repairing optical packaging film material, a preparation method thereof and an MLED packaging method, and belongs to flip chip COB packaging. The membrane material comprises the following components: an SEBS / TPU composite elastomer matrix, a surface-modified boron nitride nanosheet, a dynamic acylhydrazone bond microcapsule and a fluorine-containing siloxane oligomer. Mixing the SEBS / TPU composite elastomer matrix solution, the surface-modified boron nitride nanosheet, the dynamic acylhydrazone bond microcapsule and the fluorine-containing siloxane oligomer in proportion, carrying out planetary stirring and vacuum defoaming, and carrying out tape casting and curing to form a film; according to the invention, synergism and balance of mechanical self-adaption, self-repairing and high optical performance are realized, and the requirement of photoelectric packaging on the comprehensive performance of the material can be met; the problem that the performance of an optical packaging film material cannot be considered at present is solved.

The application belongs to the field of digital information transmission, and particularly discloses an encoding matrix solving method based on iterative conjugate gradient for digital communication. The method generates an initial matrix and evaluates a condition number through channel state sensing; a compensation matrix is constructed by using an adaptive preconditioning operator to perform spatial transformation; a multi-dimensional momentum gradient iteration is adopted to introduce historical momentum to suppress swing; and a closed-loop solution is realized by combining dynamic step optimization, solution vector updating and correction, and adaptive convergence determination. The application reduces the matrix condition number, enhances the robustness in a noisy environment, guarantees high fidelity, improves the operation efficiency, and reduces the system calculation time delay and power consumption.

The application discloses a kind of industrial internet of things-oriented blockchain transaction storage allocation method, belong to blockchain and industrial internet of things technical field.The method includes: the storage allocation problem of transaction data of DAG blockchain is established nonlinear programming model;The programming model is decomposed into sub-problems "best number solution" and "allocation matrix solution";Design a kind of solution algorithm based on breadth-first traversal, obtain the best transaction number that each edge node should store;Design a kind of solution algorithm based on greedy search, obtain the final transaction storage allocation scheme.The invention can solve the shortcoming that the capacity of edge device is not considered in the achievement GpDB, and the security of the system is also considered when solving, the solution algorithm of the two sub-problems not only has good optimization characteristics, but also has high execution efficiency.The application has important significance for promoting the integration development of industrial internet of things and blockchain technology.

A soluble microneedle capable of being dried at a high temperature, a preparation method therefor, and use thereof. By screening the prescription of microneedle matrix materials, the drying temperature for the microneedle can be increased to 40 °C to 60 °C, thereby greatly shortening the drying time for the microneedle, and better facilitating batch production. The adopted microneedle preparation process does not need special devices, and only common vacuum drying and high-temperature drying devices are needed. A two-step method is adopted, firstly, a needle tip matrix solution is rapidly loaded into a microneedle mold by means of a vacuum method, then a needle tip matrix solution containing bubbles on an upper layer is removed, a backing layer matrix solution of the prescription is added into the mold and then dried and demolded at 40 °C to 60 °C, and then the microneedle can be obtained. By adopting the above method, the problem that bubbles are difficult to completely eliminate in the process of preparing the microneedle by means of a vacuum method can be well solved.

The present invention relates to a self-assembled avalanche-responsive device and the preparation and application thereof. The responsive device is prepared through the following process: (1) taking an insulating substrate and depositing metal electrodes on both ends of an upper surface of the insulating substrate; (2) taking a nano-conductive filler and an interface modifier, adding the nano-conductive filler and the interface modifier to an elastomer matrix solution, performing stirring and mixing, and performing ultrasonic dispersion to obtain a conductive polymer solution; and (3) spin-coating the obtained conductive polymer solution onto a silicon substrate through a spin-coating process to cover terminals of the two metal electrodes provided opposite to each other; and performing drying, so as to obtain a responsive layer, so that the process is completed.

The invention discloses a composite solution for treating reflux esophagitis and a preparation method and application thereof, and relates to the technical field of pharmaceutical preparations, the composite solution is formed by physically mixing drug-loaded microspheres and a gastric buoyant raft matrix solution; wherein the drug-loaded microspheres are solid particles which take thiolated pectin as a carrier, are crosslinked and cured through divalent metal ions and are coated with a periplaneta americana extract; the gastric buoyant raft matrix solution comprises a hydrophilic colloid, a component capable of generating gas when encountering acid and a stabilizer. The magnesium mercapto pectin microspheres provide excellent mucous membrane adhesion, and the acting time of the medicine on the esophageal focus is prolonged; the gastric buoyant raft substrate forms a physical barrier in a gastric acid environment to inhibit regurgitation of gastric contents. Through cooperation of the two, a dual treatment mechanism of local repair and source control is realized. The preparation can remarkably prolong the in-vivo residence time and effectively promote esophageal mucosa healing, and the curative effect is better than that of a pure periplaneta americana extract preparation.

The invention discloses a preparation method of a gel composition with a three-dimensional network structure, a product of the gel composition and application of the gel composition in an oral care product, and belongs to the technical field of oral care products, and the preparation method comprises the following steps: preparing a matrix: dissolving polyvinylpyrrolidone in water, adding a plasticizer, heating and stirring, cooling and standing to form a matrix solution, embedding bioactive glass, and preparing the matrix solution; the preparation method comprises the following steps: dissolving olafluorine in a solvent, adding into a solution containing bioactive glass, stirring, and standing; curing by adopting a gradient heating method to form gel with a three-dimensional network structure; a thicker remineralization layer is formed, the binding force between the mineralization layer and the original enamel is remarkably enhanced, the mineralization layer is more wear-resistant and not easy to fall off, the local fluorine ion concentration is improved, the stability and acid resistance of the new mineralization layer are enhanced, and meanwhile, the irritation of the bioactive glass to the oral cavity is greatly reduced.

The invention relates to an ultrasonic hollow plane array focusing method based on pseudo-inverse matrix solution, and belongs to the technical field of man-machine interaction and virtual reality. Based on a sound pressure radiation model of a circular piston, sound pressure distribution characteristics generated by a single emitter in a sound field are established, a mathematical relationship between the total sound field sound pressure of the whole array and excitation amplitudes of all the emitters is derived on the basis, and an ideal sound field distribution target is set, so that the sound field of the array is obtained. And inversely solving the optimal amplitude configuration of each transmitter by adopting a pseudo-inverse matrix algorithm so as to control the sound field. The method is used for solving the problems that focusing energy is dispersed and the focus shape tends to be oval due to the fact that the side lobe is too large during single-point focusing of the hollow plane ultrasonic array, the side lobe level is remarkably restrained, the focus energy concentration ratio and shape regularity are improved, and the focusing performance of the hollow plane array is effectively improved.

The invention relates to the technical field of project planning, and discloses a path selection and feedback iteration-oriented equipment development project progress planning method and system, and the method comprises the steps: designing selectable nodes according to a complex equipment development process, and constructing a variable flexible graphical representation review technology network model for complex equipment development; defining a constraint condition of a path, solving an equivalent transfer function of the whole development process through a matrix solution, and constructing a variable flexible graphical representation review technology network optimization model; and solving the optimization model through a genetic algorithm to obtain a solution of equipment development. According to the method, selective nodes are constructed, then a flexible graphic review technical model with a variable structure is provided, and a variable flexible GERT network is simplified by utilizing PH distribution; three constraints of punctual completion probability, cost, completion time and variance are introduced, the expected time is minimized as a target, an equipment development multi-scheme and multi-mode selection and progress plan integrated optimization model is established, and a solving algorithm is designed.

The invention discloses a multi-suspended-span elastic bearing fluid conveying pipe stability parameter prediction method, and relates to the technical field of fluid conveying pipe vibration characteristic analysis. A multi-suspended-span pipeline is divided into a plurality of independent pipe sections at the supporting position, vibration control equations for describing all the suspended-span pipelines are established respectively, and the vibration control equations only consider the coupling effect of bending force, centrifugal force, gravity, Coriolis force and inertia force of the pipeline and do not contain any middle supporting constraint term; the intermediate support constraint is completely written into the cross-coupling boundary condition, so that the defects that the traditional Dirac function method is fuzzy in significance and the numerical calculation is difficult to converge are avoided; carrying out dimensionless processing on an oscillatory differential equation by introducing a dimensionless parameter, deducing to obtain a characteristic equation, a characteristic function and a characteristic value under the complex boundary condition by combining the end elastic boundary and the cross coupling constraint, converting a partial differential equation into an ordinary differential equation set, and carrying out matrix solution, so as to obtain an oscillatory differential equation set; and finally, an accurate prediction value of the inherent frequency can be obtained.

The disclosure is directed toward a method to efficiently perform a large language model operation by reducing the memory and computation resources for operating on a matrix such as a weight matrix. The weight matrix may be included in operations such as the head attention function of the large language model. The weight matrix is decomposed into multiple submatrices that each include a set of weights from the weight matrix. An input of the large language model is provided. A submatrix solution for the submatrix is determined from the input and the set of weights of the submatrix. The determining of a solution is repeated for each of the submatrices to provide multiple submatrix solutions. The resulting submatrix solutions are combined to obtain a matrix solution for the weight matrix.

The invention discloses a method and device for calculating the influence of foundation settlement on an immersed tube tunnel by considering soil spring differential distribution and a medium, and relates to the technical field of civil engineering-immersed tube tunnels. The method comprises the steps that stress analysis is conducted on the axial direction of a pipe joint, and an infinitesimal body is taken; timoshenko beam model equilibrium analysis is carried out on the infinitesimal body; based on the equilibrium analysis result, dividing an equilibrium differential equation solution domain of the pipe joint to replace a continuous solution domain; and on the basis of an equilibrium differential equation solution domain of the divided pipe joints, a finite difference method is utilized to add boundary conditions to form a matrix for solution, and the influence of foundation settlement on the immersed tunnel is calculated. According to the method, the problem that the shearing effect generated in the deformation of the beam cannot be considered in the existing beam theory in the non-uniform foundation settlement of the immersed tube tunnel can be solved, and the influence of the foundation difference on the immersed tube tunnel is not considered by a theoretical calculation method at present; and mechanical responses of deflection, bending moment, shearing force and the like of the pipe joint influenced by the foundation cannot be calculated.

Embodiments of the present application disclose a RS decoding hardware implementation method, an electronic device and a storage medium, comprising obtaining positions of A lost data blocks, positions of A required check blocks and an original coefficient matrix, wherein A is less than or equal to M, and M is the number of original check blocks; extracting corresponding row and column coefficients from the original coefficient matrix according to the positions of the A data blocks and the positions of the A check blocks, generating an M-order coefficient matrix according to the row and column coefficients, and calculating an inverse matrix of the M-order coefficient matrix; generating new M check blocks according to the positions of the A check blocks, and recovering the A lost data blocks according to the new M check blocks, the original M check blocks and the inverse matrix. The present application reduces the original N-order inverse matrix solution to an M-order inverse matrix solution, greatly reducing the hardware implementation complexity.

The present application relates to the technical field of solid-state battery, and discloses a porous framework enhanced composite solid-state electrolyte layer, which comprises a three-dimensional porous ceramic framework, a polymer electrolyte matrix filled in the pores of the three-dimensional porous ceramic framework, a gradient interface layer located at the positive electrode side, an oxide dense modification layer covering the gradient interface layer, and a flexible buffer layer located at the negative electrode side. The preparation method comprises three-dimensional porous ceramic framework preparation, polymer electrolyte matrix solution preparation, vacuum impregnation composite molding, gradient interface layer construction, oxide dense modification layer preparation, and negative electrode side flexible buffer layer preparation. The solid-state electrolyte layer provided by the present application can realize long cycle, high rate and high safety performance of the semi-solid-state battery, and the method process is simple and easy to implement in industrialization.

The application relates to the technical field of SCGD-OES online detection, and specifically provides a multi-element online quantitative method, system, equipment and medium of a high-salt matrix solution, which comprises the following steps: synchronously collecting multi-modal data; constructing a state vector according to the multi-modal data; calculating a stability index through robust principal component analysis and Mahalanobis distance; combining with working condition parameters to distinguish the working condition and the stability state; and adaptively selecting a quantitative analysis mode; under the working condition constraint, inputting spectral line characteristics into a segmented weighted least square regression model which is fused with monotonicity constraint, multi-spectral line consistency and self-absorption / quenching penalty term, compensating for the matrix effect and calculating the concentration; and finally, fusing the stability index, spectral line consistency deviation and model residual error to calculate the comprehensive confidence, and outputting the concentration and the confidence. The application improves the accuracy, robustness and result reliability of multi-element online analysis under high-salt, dynamic and nonlinear complex working conditions.

According to the preparation method of the ceramic particle combined filter, a sodium alginate solution is adopted as a matrix solution, electrostatic interaction between the sodium alginate solution and calcium ions is utilized to form a stable cross-linked structure, a chelating agent is supplemented to form a three-dimensional network structure, the cross-linked structure is further consolidated, and a prepared biscuit is high in strength, smooth in surface and high in strength. On the basis, a required structure can be processed. In the high-temperature sintering process, the boron source can fully react in an aluminum oxide-rich environment to generate 9Al2O3. 2B2O3 fibers, and the 9Al2O3. 2B2O3 fibers have the advantages of high strength, high modulus and good fatigue resistance and serve as a binding phase in a filter to tightly connect the granular sand; the calcium element in the curing agent is attached to the periphery of the fiber and is converted into a liquid phase to protect the 9Al2O3. 2B2O3 fiber during service, and scouring of high-temperature liquid can be effectively slowed down. The ceramic filter prepared through the technical route has excellent high-temperature performance and can effectively resist high-temperature liquid scouring in the service process.

The invention belongs to the field of composite materials, and discloses a composite material based on Field metal and PVB as well as a preparation method and application of the composite material. The preparation method comprises the following steps: S1, shearing Field metal at a high speed under the action of an acetic acid / diethylene glycol mixed solution, rapidly cooling, filtering and washing to prepare Field metal core-shell particles; s2, PVB is dissolved in ethyl alcohol, a plasticizer is added, and after the plasticizer is dissolved and dispersed uniformly, a PVB matrix solution is prepared; and S3, adding the Field metal core-shell particles prepared in the step S1 into the PVB matrix solution prepared in the step S2 to prepare the composite material. The composite material prepared by the invention has good mechanical responsiveness, excellent electrical conductivity and thermal conductivity, has a hydrophilic surface, and is suitable for wearable equipment.

The invention provides a subject-object interface assembled double-ligand MOF and PVA mixed matrix membrane, which is prepared by the following steps: jointly dissolving metal salt and amino acid in deionized water, carrying out ultrasonic treatment, adding a solubilizer, carrying out ultrasonic treatment, adding an active substance, carrying out ultrasonic treatment, carrying out hydrothermal reaction on the obtained mixture at 60-100 DEG C for 1-3 hours, centrifuging to take a solid, and drying to obtain the subject-object interface assembled double-ligand MOF and PVA mixed matrix membrane. Washing with ethanol, and drying to obtain a subject-object interface assembled double-ligand MOF (Metal Organic Framework); dispersing the film-forming matrix in deionized water, and performing water bath at 60-100 DEG C for 1-3 hours to obtain a film-forming matrix solution; adding the host-guest interface assembled double-ligand MOF into the film-forming matrix solution, uniformly stirring to obtain a film-forming solution, carrying out tape casting on the film-forming solution, and drying to obtain a host-guest interface assembled double-ligand MOF (at) PVA mixed matrix film; the preservative is safe and non-toxic, has good hydrophobic property, barrier property and remarkable antibacterial property, and lays a solid and reliable foundation for deep research in the field of preservation.

The invention relates to a waveguide mode solution calculation method based on PINNs, and belongs to the technical field of waveguide mode solution, and the method comprises the steps: taking a physical information neural network 4DPINNs based on fourth derivative constraint as a network model of waveguide mode calculation, and constructing a loss function of model training; the 4DPINNs network is constructed into a first network architecture or a second network architecture; wherein in the first network architecture, corresponding electric field distribution is calculated and output under the condition of an effective refractive index of a given waveguide mode; in the second network architecture, the effective refractive index of a given waveguide mode is used as a training parameter, and the effective refractive index and corresponding electric field distribution are output at the same time; and training the first network architecture or the second network architecture by using a training set formed by discrete data points of the waveguide until the total loss function converges, thereby obtaining a full-vector waveguide mode solution. According to the method, the key problems of geometric modeling limitation and high matrix solving difficulty of a traditional numerical method are solved, and high-precision solving of the full-vector optical mode is realized.

The invention relates to an MALDI-TOF (Matrix-Assisted Laser Desorption / Ionization Time of Flight) mass spectrometry-based nano micro-plastic rapid screening method, which comprises the following steps: pretreating solid samples such as garbage and soil and liquid samples such as percolate and underground water, and enriching nano micro-plastic solid particles; adding an organic solvent into the solid particles for dissolving to obtain a micro-plastic sample solution; respectively dissolving an imaging matrix and a cationizing agent in the organic solvent to form a matrix solution and a cationizing agent solution, and mixing the matrix solution, the cationizing agent solution and the matrix solution according to the mass ratio of (9-11): (9-11): 1; and after the mixed solution is spotted on a target plate for natural crystallization, a spectrum is collected by an MALDI-TOF mass spectrometer, and a characteristic signal is analyzed. The method breaks through the limitation that only large-particle-size micro-plastics can be detected in the prior art, realizes accurate identification of nano-scale micro-plastics with the particle size less than 1 micron, widens the screening medium range, greatly shortens the analysis period, and meets the rapid and accurate screening requirements of new pollutant risk prevention and control.