45results about How to "Shorten the modeling cycle" patented technology

The invention provides a method and system for obtaining a three-dimensional model of a building. According to the method and system for obtaining the three-dimensional model of the building, optimal side faces and optimal oblique aerial photos which correspond to all the actual side faces of the building are selected according to exterior orientation elements of the oblique aerial photos and a method for calculating areas of oblique aerial photos, blocking parts between the optimal side faces are removed, and differential rectification and clipping are conducted on the optimal side faces, with the blocking parts being removed, in the optimal oblique aerial photos, so that the side face textures of the building are obtained and the accuracy of the side face textures of the building is improved; the one-to-one correspondence between the obtained side face textures of the building and a building blank pattern is established according to the optimal side faces, so that the textures, obtained through oblique photographing, of the building are automatically mapped to the building blank pattern, and the obtained side face textures and top surface textures of the building are mapped to the obtained building blank pattern, so that the three-dimensional model, provided with the side face textures and the top surface textures, of the building is obtained. The method and device for obtaining the three-dimensional model of the building have the advantages that the mapping processes are simplified, the automation degree is improved, and the modeling cycle is shortened.

The invention discloses a computer-aided design (CAD) graphical modeling method for a software / hardware system and belongs to the field of graphical modeling. The method is characterized by comprising a user graph manipulation interface F1, a software / hardware module library management device F2, a graphics modeling device F3, a program task allocation mapping device F4, a core data module F5, a model and mapping file resolver F6 and a model and mapping file F7. The user graph manipulation interface F1 is used for completing the function of modeling according to instructions such as the drawing instruction of a user; the software / hardware module library management device F2 is used for managing a software / hardware basic module with parameters capable of being configured; the graphics modeling device F3 is used for building a software / hardware graphical model by use of the software / hardware basic module; the program task allocation mapping device F4 is used for building a task allocation mapping relationship from software to hardware; the core data module F5 is used for defining various data contents of a modeling system; the model and mapping file resolver F6 is used for resolving files stored according to formats to acquire the various data contents, or storing the data contents as the files according to the formats; and the model and mapping file F7 is used for storing the files according to the formats. By means of the CAD graphical modeling method for the software / hardware system, visualized and efficient software / hardware integrated modeling can be achieved by the user, and an allocation mapping scheme of software tasks on the hardware can be specified.

The invention relates to a ship cabin rapid modeling method based on an APDL language of ANSYS / LS-DYNA. The method comprises the following steps: firstly, parameterizing each panel of a cabin and eachkey size of a reinforcing rib structure of the panel, then carrying out common node setting on an overlapping region of a cabin wall and a reinforcing rib by utilizing an APDL language, establishinga solid model of each panel and the reinforcing rib of the cabin, and quickly cutting the model by adopting a cyclic instruction, controlling a distance and changing the position and direction of a working surface; secondly, performing grid rapid division on the cabin model and the air domain by utilizing a hexahedron entity unit with a specific size, defining a welding structure between cabin walls by adopting a fixedly connected fracture contact model (TSTS), and establishing a ship cabin finite element analysis model. According to the method, a common node method and a fixed connection fracture failure method are adopted to define a single cabin wall inner welding structure, and the reliability of ship cabin indoor explosion test damage effect research is improved.

The invention discloses a modeling simulation analysis method for thermal mechanical systems such as aero-engines. The modeling simulation analysis method is used for solving the technical problem of poor practicality of existing methods. According to the technical scheme, the modeling simulation analysis method has the advantages that the shortcomings of poor readability, maintainability and expansibility of procedure-oriented program design methods can be overcome by the aid of object-oriented modeling processes; the modeling simulation analysis method is based on a universal simulation platform MATLAB / SIMULINK, can bring convenience for designing controllers of the thermal systems such as the aero-engines and has excellent man-machine interaction interfaces; different built functional modules are low in coupling, and accordingly modeling procedures are high in flexibility, expansibility and portability; algorithms for various components and iterative solvers are optimized, so that a high-precision aero-engine model can be built; current mature linear system controller design processes with linear modules can be applied to the aero-engine model, and accordingly the modeling simulation analysis method is good in practicality.

The invention relates to the technical field of system scheduling, and discloses a system scheduling method based on a Petri network and heuristic search. The method comprises the following steps: modeling constituent elements in a manufacturing system by using the Petri network to obtain a Petri network model of the system; carrying out initialization processing on system resources in the Petri network model; searching the Petri net model by using an A-Star search algorithm based on cost estimation to obtain a partial reachability graph of the Petri net model; establishing an objective function taking minimum system operation cost as system scheduling; based on the partial reachability graph and the target function of the Petri net model, performing path optimization in the Petri net model by using an improved fruit fly optimization algorithm, and outputting a path meeting the minimum target function as a system scheduling path. According to the invention, optimization of system scheduling is realized.

The invention discloses a computer-aided design (CAD) graphical modeling method for a software / hardware system and belongs to the field of graphical modeling. The method is characterized by comprising a user graph manipulation interface F1, a software / hardware module library management device F2, a graphics modeling device F3, a program task allocation mapping device F4, a core data module F5, a model and mapping file resolver F6 and a model and mapping file F7. The user graph manipulation interface F1 is used for completing the function of modeling according to instructions such as the drawing instruction of a user; the software / hardware module library management device F2 is used for managing a software / hardware basic module with parameters capable of being configured; the graphics modeling device F3 is used for building a software / hardware graphical model by use of the software / hardware basic module; the program task allocation mapping device F4 is used for building a task allocation mapping relationship from software to hardware; the core data module F5 is used for defining various data contents of a modeling system; the model and mapping file resolver F6 is used for resolving files stored according to formats to acquire the various data contents, or storing the data contents as the files according to the formats; and the model and mapping file F7 is used for storing the files according to the formats. By means of the CAD graphical modeling method for the software / hardware system, visualized and efficient software / hardware integrated modeling can be achieved by the user, and an allocation mapping scheme of software tasks on the hardware can be specified.

The invention provides a method and system for obtaining a three-dimensional model of a building. According to the method and system for obtaining the three-dimensional model of the building, optimal side faces and optimal oblique aerial photos which correspond to all the actual side faces of the building are selected according to exterior orientation elements of the oblique aerial photos and a method for calculating areas of oblique aerial photos, blocking parts between the optimal side faces are removed, and differential rectification and clipping are conducted on the optimal side faces, with the blocking parts being removed, in the optimal oblique aerial photos, so that the side face textures of the building are obtained and the accuracy of the side face textures of the building is improved; the one-to-one correspondence between the obtained side face textures of the building and a building blank pattern is established according to the optimal side faces, so that the textures, obtained through oblique photographing, of the building are automatically mapped to the building blank pattern, and the obtained side face textures and top surface textures of the building are mapped to the obtained building blank pattern, so that the three-dimensional model, provided with the side face textures and the top surface textures, of the building is obtained. The method and device for obtaining the three-dimensional model of the building have the advantages that the mapping processes are simplified, the automation degree is improved, and the modeling cycle is shortened.

The present invention provides a humanized mouse model of cytomegalovirus infection and a construction method thereof. The construction method includes: constructing an initial model by infusing G-CSF mobilized human peripheral stem cells into NSG mice; wherein, the The input of G‑CSF mobilized human peripheral stem cells was 1×10 6 per mouse; after the human peripheral stem cells are engrafted, cytomegalovirus is injected into the initial model to obtain a stable cytomegalovirus-infected humanized mouse model. The construction method provided by the present invention can reduce the occurrence of GVHD, and provide a stable place for experimental research based on the model in the later stage; meanwhile, the engraftment period of human peripheral stem cells is short, which greatly shortens the modeling period and speeds up the later stage. Based on the experimental research progress of the model, the modeling method provided by the present invention has broad application prospects.

The invention relates to the field of modeling of three-dimensional voxel models, discloses a construction method of a creative three-dimensional voxel model modeling system based on deep learning. The method constructs a modeling system capable of automatically generating a creative three-dimensional voxel model and having an interactive editing function. The method comprises: A, manufacturing avoxel data set of a three-dimensional model and a semantic component data set forming the three-dimensional model; B, building a generation model of a three-dimensional model and a generation model ofa three-dimensional model composition part, and respectively training by adopting a voxel data set and a semantic part data set; C, constructing a semantic structure model based on an encoder in thegeneration model of the trained three-dimensional model and an encoder in the generation model of the trained three-dimensional model component, and performing training; and D, integrating the trainedsemantic structure model into a system to serve as a modeling algorithm, and meanwhile, providing an interactive interface and a controllable editing interface for the generated three-dimensional model component for a user.

The invention relates to a car body beam frame collision modeling and analysis method considering characteristics of a plastic hinge, and belongs to the field of car body design. The method comprises the steps of firstly solving a cross section area and a bending-twisting inertial moment characteristic of the cross section, with a complex shape, of a car body beam frame; secondly creating a car body beam frame model; thirdly generating a plastic hinge model characteristic of a thin-walled beam unit, and assigning a value to a material characteristic of a Belytschko-Schwer (BS) beam unit, wherein an MAT 29# material type of LS-DYNA software is selected for the material characteristic; and finally generating a keyword text file that can be solved by the LS-DYNA software, and calling the LS-DYNA software to perform collision solving. The car body frame model is established by adopting the beam unit; the plastic hinge model simulates bending, twisting and crushing deformation of a beam to perform collision analysis; a solving result is reliable, the user operation is convenient, and the modeling period is greatly shortened; and the method has an important guide effect for car body design.

The invention discloses a finite element parametric modeling method of a seaming laminboard. The method comprises steps that 1, geometrical characteristic parameters of the seaming laminboard are acquired; 2, finite element modeling characteristic parameters of the seaming laminboard are acquired; 3, a seaming laminboard finite element model database is built by adopting a geometrical matching relation; 4, the steps are programmed into parametric modeling script programs, and a finite element model of the seaming laminboard can be constructed. According to the finite element parametric modeling method of the seaming laminboard, finite element modeling is conducted on the seaming laminboard, the parametric modeling method is adopted, finite element analysis models of the seaming laminboardunder parameter variables such as different sizes and seaming line densities can be quickly and conveniently obtained through MATLAB and MSC.PCL language interaction programming, then the modeling period is effectively shortened, the unit quality is improved, the analysis efficiency and precision are improved, and efficient and high-precision analysis of the seaming composite material laminboard can be achieved.

The invention belongs to the field of modeling of microwave circuits and devices, and provides a neural network space mapping modeling method for large-signal power transistors. The method first establishes a neural network space mapping model with capacitance and inductance, and changes the DC and AC characteristics of the model, respectively; then uses a novel nonlinear function to extract additional current signals to improve the large-signal characteristics of the existing device model while maintaining The S parameters are unchanged. Finally, a step-by-step training method is adopted to quickly train the proposed neural network spatial mapping model, which avoids repeated adjustment of variables and shortens the modeling cycle.

The invention discloses a finite element calculating method for a large bore tube simplifying model of a heat exchanging tube. A plate-type heat exchanger is subjected to heat exchange through the temperature difference of fluid on the two sides of the heat exchanging tube so as to achieve the purpose of heating the fluid on one side. The finite element calculating method for the large bore tube simplifying model of the heat exchanging tube comprises the following six steps: step one, establishing and simplifying a finite element calculating model, and conducting multi-series equivalence on the heat exchanging tube; step two, determining the number of heat exchanging tubes of an a-level model according to the finite element calculating model; step three, determining the number of heat exchanging tubes in a-level distribution according to the number of the heat exchanging tubes of the a-level model; step four, determining the sum of the cross sections of the heat exchanging tube after the equivalence to be equal to that of the cross sections of the heat exchanging tubes before the equivalence; step five, arranging the all levels of heat exchanging tubes in a staggered manner; and step six, corresponding the different levels of equivalence to different correction factors being 0.20-1.09. The finite element calculating method is used for manufacturing a tube sheet of the heat exchanger.