44results about How to "The method is versatile" patented technology

The invention discloses a method for rapidly establishing three-dimensional fine thermos-hydraulic calculation models for primary side systems of large-scale natural circulation vapor generators in nuclear power plants under certain heat transfer tube blocking accident conditions. The method comprises the following steps of: 1, carrying out complete primary side hydraulic analysis on a vapor generator so as to analyze a flow distribution law at a tube plate; 2, selecting a tube blocking scheme according to a result of the last step; 3, determining a tube blocking share and a tube blocking position; 4, carrying out geometric simplification and overall geometric modeling on a plurality of heat transfer tubes in the real vapor generator; 5, dividing preliminary calculation nodes; 6, establishing a tube blocking equation to tracing marked control areas, and carrying out calculation domain grid marking on the control areas by adoption of a network marking method so as to realize a tube blocking function; and 7, carrying out blocking condition calculation by adoption of a preliminarily established model and analyzing the precision of the result, and if a requirement is satisfied, considering that the modeling is completed, and otherwise, returning to the step 5 to encrypt the calculation nodes until the model satisfies the calculation precision requirement.

The invention relates to a parameter mapping-based measurement planning method for a complex curved surface which belongs to the field of precision measurement. In the method, a triangular grid curvedsurface is mapped into a plane parameter domain by adopting a grid parameterization method to form a plane grid model corresponding to the vertex of the triangular grid curved surface and the vertexof the plane parameter domain; a boundary contour of the plane grid model is extracted, boundary contour lines are utilized as guiding line segments, and according to a measurement accuracy requirement, each segment is offset in a normal direction to generate measurement paths covering the entire plane grid model; each measurement path is again inversely mapped to the triangular grid curved surface to obtain curved surface measurement paths; and arranging points on the curved surface measurement paths by using an equal-chord height difference method to complete measurement and planning of thecomplex curved surface. The method enables the measurement efficiency to be improved, and enables the difficulty of the measurement and planning of the complex curved surface to be reduced, and versatility is strong, and requirements of unified processing of curved surface measurement path planning of various models under the same framework can be satisfied.

The invention discloses a pressurized water reactor containment vessel two-side condensation and evaporation coupling calculation method. The method comprises the following steps: establishing a pressurized water reactor containment vessel computational domain simplified geometric model; performing grid generation on each part in the pressurized water reactor containment vessel computational domain model to obtain a grid model of each part; setting an interface of each part in a calculation domain of the pressurized water reactor containment as a grid interface to realize splicing of grids ofeach part; performing steam condensation calculation in the range of the fluid domain grid model in the containment vessel; calculating the temperature distribution in the solid domain of the containment body structure through the heat conduction relational expression; and calculating a flow field and a temperature field of a liquid film in an external fluid domain of the containment vessel by adopting a liquid film model.

The invention discloses a two-side cooling and evaporation coupling calculation method for a liquid metal spiral tube steam generator. The method comprises the following steps: establishing a spiral tube steam generator computational domain prototype geometric model; meshing each part in the spiral tube steam generator computational domain model to obtain a mesh model of each part, and setting boundary conditions; setting an interface of each part in the spiral pipe steam generator computational domain as a grid interface to realize splicing of grids of each part; importing the physical property of the liquid metal according to a turbulence Pr number correction relational expression; carrying out reasonable initialization and boundary condition correction; and carrying out steam evaporation, lead bismuth condensation and coupled flow heat transfer calculation of a pipe wall solid region in all regions including a solid region and a grid model range of a shell side fluid region and a pipe side fluid region of the spiral pipe steam generator.

The invention provides a multi-shaft-hole automatic aligning method based on a laser tracker, and belongs to the technical field of large part assembly control. The multi-shaft-hole automatic aligningmethod comprises the steps that firstly, a multi-shaft-hole automatic aligning system constituted by the laser tracker, a mechanical arm and a computer is set up, and a shaft part is mounted on the end face of the mechanical arm; a shaft part coordinate system and a perforated part coordinate system are built, and a rotation matrix and a translation vector between the two coordinate systems are obtained; four non-collinear reflecting target spheres are mounted on the shaft part, and the target positions corresponding to all the target spheres are calculated; and an initial jacobian matrix ofthe mechanical arm is obtained; movement of the mechanical arm is controlled in an iterating mode from the initial position, thus the shaft part gets close to the perforated part gradually, and when the four reflecting target spheres reach the target portions, the shaft part and the perforated part are aligned. Movement of the mechanical arm is controlled in a closed-loop mode through measuring data of the laser tracker, multi-shaft-hole high-precision automatic aligning can be achieved, and the assembly efficiency and robustness are improved.

The invention discloses a post-processing method for a numerical simulation calculation result of a pressurized water nuclear reactor pressure vessel. The post-processing method comprises the following steps: firstly, confirming and grading a flowing phenomenon existing in an existing pressurized water nuclear reactor pressure vessel; respectively establishing three-dimensional geometric models ofan upper chamber and a lower chamber in the pressurized water reactor pressure vessel; using meshing software for meshing the three-dimensional geometric models of the upper chamber and the lower chamber of the pressure vessel, and importing the three-dimensional geometric models into computational fluid mechanics software for numerical simulation calculation; establishing a three-dimensional geometric model of a complete component in the pressure vessel, carrying out mesh generation on the three-dimensional geometric model, and then carrying out simulation calculation; and importing a calculation result into data analysis processing software, performing a series of processing on the result by utilizing a software trajectory tracking function, and generating a required Python script and arequired result picture. According to the method, different types of pressurized water reactor pressure vessel simulation calculation results can be analyzed and processed, different forms of numerical simulation calculation results can be processed with the same method, and a large amount of repeated and redundant work is avoided.

The invention discloses a method for establishing a grid model of a steam generator dryer assembly with an inclined sealing plate, which comprises the following steps: establishing a dryer assembly geometry structure without a sealing plate; T establishing he fluid domain model of dryer assembly without inclined sealing plate. Establishing a three-dimensional cuboid topological block suitable forthe fluid domain model; setting The number and distribution of nodes on the topology block to form a structured hexahedral mesh model. Checking whether the coordinates of the center of each grid cellsatisfy the projection straight line equation of the oblique seal plate, and marking the grid cell of the oblique seal plate according to the projection straight line equation; Setting the marked gridcells as solid to form a dryer assembly grid model of an inclined sealing plate; The invention solves the problem of establishing the geometric model when the dryer assembly with the inclined sealingplate is mesh-depicted, the mesh quantity is large and the mesh quality is low when the unstructured mesh is adopted, and the invention also provides convenience for establishing a new mesh model bychanging the inclination angle of the dryer assembly.

The invention discloses a method for testing power performance indexes, particularly relates to intelligent instrument control technology and belongs to the technical field of intelligent control systems. The method includes that electronic engineers compile a GPIB (general purpose interface bus) instruction group card of performance indexes required by fault testing for a circuit board; program development personnel build a database for storing each GPIB instruction group required by testing for the corresponding performance index; the instruction groups are inputted into the database via a user interface; and programmers write an intelligent GPIB instruction interpreter. Software development personnel do not need to know specific electronic and electrical professional knowledge of the tested performance indexes, and accordingly requirements on comprehensive abilities of various personnel in a system are greatly lowered. In addition, severe shortcomings that GPIB instructions are directly bound with programming languages traditionally, programs need to be modified even if the used GPIB instructions or parameters are changed subtly, and software development personnel and electronic and electrical engineers need to work together are overcome.

The invention discloses chocolate containing a microorganism resource of polydextrose and a preparation method thereof. Curdlan dry powder with the mass percentage being 0.4 percent to 0.6 percent or Curdlan prefabricated food gum (the mass percentage content of Curdlan is 10 percent to 15 percent) with the mass percentage being 4 percent to 6 percent is added into chocolate slurry. The chocolate slurry is subjected to mixing, fine grinding, refining and molding; then, the slurry in a mold disc is subjected to heating treatment, so that the inside temperature of the slurry reaches 85 to 95 percent; the temperature is maintained for 10 to 15 minutes; after the temperature is lowered, chocolate with thermostabilityis obtained. The obtained chocolate product has the advantages that the thermostability is fast formed within 5 to 30 minutes; the Curdlan can absorb water in the chocolate product; the problem of bad favor in the storage period is avoided; used as microorganism resource dietary fiber, the Curdlan can achieve an effect of enhancing the nutritive value of the chocolate product.

The invention provides a rapid test and identification method for an organic mixed liquid sample. The rapid test and identification method comprises the following steps: (1) qualitative analysis: 1) infrared spectroscopy qualitative analysis; (2) carrying out qualitative analysis by using a gas chromatography-mass spectrometry method; (2) when the qualitative analysis result in the step (1) shows that the sample contains one or more of toluene, acetone and butanone, further quantitatively analyzing the contents of toluene, acetone and butanone, wherein when the qualitative analysis result in the step (1) shows that the sample does not contain any one of toluene, acetone and butanone, the step (2) does not need to be carried out. The method has the following beneficial effects: (1) the pretreatment conditions are simple and rapid, and complicated extraction, purification and other means are not needed; (2) the method has strong universality and is suitable for various organic mixed liquid samples; and (3) component identification of the organic mixed liquid sample can be rapidly realized, rapid customs clearance of enterprises is facilitated, and customs are served for law enforcement and customs control.

The invention discloses a preparation method of a calcium silicate hydrate nano-film, and particularly relates to a method for preparing the calcium silicate hydrate (C-S-H) nano-film through a magnetron sputtering method. The method comprises the steps that firstly, calcium silicate hydrate powder with a certain calcium-silicon ratio is calcined; secondly, the calcined powder is pressed into a target material through a steel die; thirdly, a film with a certain thickness is deposited on the substrate surface through a magnetron sputtering technology; and lastly, a film sample is put into a calcium hydroxide saturated aqueous solution to be soaked, and then the calcium silicate hydrate nano-film can be obtained. According to the preparation method of the calcium silicate hydrate nano-film,a foundation is laid for observation of the calcium silicate hydrate microtopography on the microscale and research on the aspects such as the mechanical property and the durability.

The invention discloses a method for calculating a steam humidity load distribution non-uniformity coefficient of a corrugated plate dryer assembly in a steam-water separation dryer system. The methodcomprises the following steps: introducing computational fluid mechanics software into a grid model of the steam-water separation dryer system as a computational domain; determining the physical properties and boundary conditions of the continuous-phase steam, and calculating the turbulence flow of the continuous-phase steam by applying a Reynolds time-averaging method; iteratively solving a massconservation equation and a momentum conservation equation in each grid unit of the computational domain to obtain a steady-state flow field of the continuous-phase steam; determining a physical property, a boundary condition and a stress model of the discrete phase liquid drop; carrying out single-phase coupling calculation on the discrete-phase liquid drops and the continuous-phase steam on a steady-state flow field of the continuous-phase steam, and solving a position equation and a momentum conservation equation of the discrete-phase liquid drops; and calculating the humidity load non-uniformity coefficient of the continuous phase steam at each corrugated plate dryer unit inlet in the dryer assembly of the steam-water separation dryer system.

The invention provides a minimum triggering angle running test method for a high-voltage direct current power transmission converter valve. According to the method, switch-on voltage of a test sample valve Vt is flexibly selected by selecting a triggering moment of an auxiliary valve V1 during charging of a resonant capacitor C according to different engineering requirements, and is adjustable continuously; and therefore, the contradiction between low triggering voltage and high test voltage is solved, and the low triggering voltage and the high test voltage are not interfered with each other. The method is suitable for different test sample valves, and is high in generality.

The invention provides a three-dimensional target multi-viewpoint view modeling method based on support vector data description. The method comprises three steps of 1, obtaining a full gesture image of a test target; 2, extracting a target characteristic vector set {xi|i=1,2,ellipsis N} from the obtained full gesture image set; and 3, representing the distribution of the characteristic vectors extracted from the image in a characteristic space by a support vector data description (SVDD) method, and using the obtained few characteristic vectors with fully representativeness as the multi-viewpoint view modeling result of the target. Aiming at the problem that the single target view description cannot identify the target caused by difference of the target image under different viewpoints, the invention discloses the three-dimensional target multi-viewpoint view modeling method with less redundant information and capability of describing the full gesture characteristic vector of the target. The method provided by the invention has good practical value and wide application prospect in the field of pattern recognition.