135results about "Geometric CAD" patented technology

A method for generating architectural design requirements for a building structure is disclosed. A schematic drawing file of the building structure is loaded. The building type for the building structure is designated. A topology mask identifying the functional zones demarcated by the schematic drawing is created over the schematic drawing. Architectural design standards that are specific to the building type designated are applied to each of the identified functional zones to generate the architectural design requirements for the building structure. The architectural design standards being stored in a relational database.

The present invention relates to a gear construction method, including the steps of: i) setting gear parameters and an XYZ coordinate system; ii) according to the gear parameters, creating a first curve associated with an involute of a tooth profile of a target tooth in an XZ plane, and creating a second curve associated with the involute of the tooth profile of the target tooth in a YZ plane; iii) combining the first curve with the second curve to form a third curve and projecting the third curve onto an XY plane to obtain the involute of the target tooth; and iv) constructing a tooth profile of the target tooth and form a solid model of the entire gear by using the involute. The present invention also relates to a digital apparatus associated with the above gear construction method.

An apparatus, tool, and method for modifying a portion of a floor plan based on measurements made by one or more sensors. The apparatus comprises a correction unit for compensating the sensor measurements for instrument errors and a layout unit for improving the conformity of the portion of the floor plan to a set of layout rules. The apparatus may also comprise the sensors that made the measurements.

Aiming at solving the problems that flow velocity and impact of any point in any section of mud-flow cannot be measured in the prior art, the invention first provides a method for measuring viscous mud-flow internal flow velocity and impact force spatial distributions. The method for measuring flow velocity is based on the viscous mud-flow body Bingham model and the scour-and-fill balance principle; first, setting any section I-I, determining values such as h0, h(x), xa, xd, xb, xc of the section through the trial method; then calculating the flow depth of a mud-flow calculation infinitesimal surface at any point on the section according to formula 1; and finally substituting h into the Bingham-model-based viscous mud-flow flow velocity distribution formula to obtain flow velocity of the point. By means of the method for measuring flow velocity at any position in any section of mud-flow, the method for measuring spatial distribution of viscous mud-flow impact force is further obtained. The calculation result of the method has high accuracy, which can be applied in real design for viscous mud-flow prevention and control engineering. The measurement method is clear in thinking and simple in calculating, which is an improvement of the present prevention and control engineering design method which is based on uniform distribution.

The invention relates to a display method and system of technical disclosure of a constructional ornament. The method includes the steps of obtaining the technical disclosure of the constructional ornament, and extracting constructional structure information, constructional material information and technical requirement information of a process from the technical disclosure of the constructional ornament; according to constructional structure information, creating a three-dimensional model; importing the three-dimensional model into a virtual scene created in advance to make the three-dimensional model displayed in the virtual scene in a three-dimensional mode; correlating the constructional material information and the technical requirement information of the process with a correspondingconstructional structure in the three-dimensional model, and displaying the constructional material information and the technical requirement information of the process according to a trigger signal.The display method and system of the technical disclosure of the constructional ornament solve the problems, such as inconvenience for carrying and consultation difficulty which are caused by technical disclosure of paper; with dependence on the electronized technical enclosure, information interaction with construction staff can be effectively formed, and the technical disclosure is more visuallyand completely shown.

The invention discloses a crowd behavior simulation method and a crowd behavior simulation system guided by a safety evacuation mark. The method comprises the following steps of: creating a three-dimensional building model of a scene to be simulated; determining the quantity and the position of the exit corresponding to the scene to be simulated in the three-dimensional building model; marking thelocation of safety evacuation signs corresponding to the scene to be simulated in the three-dimensional building model; according to the number of exits, the location of exits and the location of safety evacuation signs, the road markers in the three-dimensional building model being set in advance, and then PRM algorithm being used to generate all the available evacuation paths, and the paths inthe planning direction of safety exit being marked as one-way paths, paths beyond the planning direction of the safe exit being marked as one-way paths to the outbound exit; importing characteristic data of initializing evacuation crowd; a Dijkstra algorithm being used to find the shortest escape path from the one-way path for the evacuated individuals; in the process of crowd evacuation, an RVO obstacle avoidance strategy being used to simulate crowd evacuation.

The invention discloses a high-speed railway subgrade settlement prediction system based on GEP. Firstly, the filling soil mass of a high-speed railway has different engineering properties due to different soil foundations, and a subgrade settlement prediction problem is researched by selecting typical road section data; secondly, according to the principle of gene expression programming, a high-speed railway subgrade settlement predication program based on the gene expression programming is programmed by using C++; and then, detection data of railway subgrade settlement are used as training data to be imported into the high-speed railway subgrade settlement predication program based on the gene expression programming, and a railway subgrade settlement predication function model based on the gene expression programming is obtained through program operation. Settlement prediction is carried out on a certain high-sped railway subgrade monitoring point by using the model and a GM(1,1) grey prediction function model, a prediction result is obtained, and the prediction accuracy of the two models is comprehensively analyzed, so that excellent prediction ability of the models is verified.

The invention discloses an aero-engine turbine blade reliability evaluation method based on fracture mechanics. The method comprises the following steps: S1, establishing a simplified model of a bladesection by taking a turbine blade as a research object, calculating a stress intensity factor of the turbine blade containing an initial I-type crack at a blade root by applying a finite element method, substituting the stress intensity factor into a shape factor calculation formula, and determining a shape factor parameter; S2, establishing a turbine blade reliability model based on the generalized stress intensity interference model; and S3, establishing a probability density function of load and fracture toughness, establishing a probability life model and a reliability model for the bladein combination with a Paris formula, and solving the model to obtain the change condition of the reliability of the turbine blade along with the life. According to the method, initial defects existing in the blade are considered, on the basis of the initial defects, the crack propagation life of the I-shaped cracks on the surface of the blade under the cyclic load is established, and life prediction and reliability evaluation of the blade can be more accurate.

The invention provides a partitioned simulation method for a nuclear power unit condenser. The method comprises the steps of (1), partitioning simulation objects, wherein the simulation objects comprise general condensers and shared condensers, and partitioning comprises uniform partitioning and non-uniform partitioning; (2), inputting structure sizes, physical properties, boundary parameters and calculation initial values of the condensers; (3), carrying out thermal-transfer calculation on one-to-one correspondence partitions at a shell side and a pipe side; (4), carrying out thermal parameter calculation; and (5), outputting a simulation result. Compared with an actual device, the simulation model established by the method has the advantages that the output data under steady state and transient state condition can satisfy a device simulation precision demand, and the operation characteristic research can be carried out through utilization of the simulation method.

The invention discloses an agricultural producing area soil monitoring point arrangement method based on step-by-step grid refinement. The method comprises the steps of collecting the administrative map and land use map of a target area; distributing initial grids, looking for and refining monitoring points, arranging the monitoring points one by one till a monitored target agricultural producing area is covered by the monitoring points according to the land use type and a step-by-step refined grid, and forming an agricultural producing area soil preset monitoring point distribution diagram. According to the method, basic maps or drawings and the GIS space analysis technique are fully utilized, blindness during agricultural producing area soil monitoring point arrangement and sampling is reduced, accuracy, representativeness and scientificity of agricultural producing area soil monitoring point arrangement are improved, and operation and implementation are made easy for basic sampling personnel.

A method for multi-objective optimization of powertrain mount system is disclosed. The method comprises the following steps of: establishing a dynamic model of a powertrain mounting system; The vibration differential equation of the system is established based on the basis; By solving the vibration differential equation, the energy of the system is decoupled, and the frequency response characteristic functions of the center of mass displacement and the rotation angle of the system and the dynamic reaction force of the suspension are obtained. Taking mounting stiffness and mounting angle as optimal design variables, Taking the natural frequency and other variables as constraints, establishing A multi-objective function model with the objective of maximizing the energy decoupling rate in thevertical direction and the crankshaft direction, minimizing the center of mass displacement and rotation angle of the system when the center of mass of the system is loaded with a unit torque load, and minimizing the center of mass displacement and rotation angle of the system when the center of mass of the system is loaded with a unit displacement load. The invention considers the influence of the displacement load on the NVH performance of the whole vehicle, and increases the mounting angle as an optimization variable, so that a better optimization scheme can be obtained.

The invention provides a vehicle-mounted bridge bearing capacity rapid detection and evaluation system and method. The system comprises a bridge data acquisition subsystem used for acquiring bridge image information, bridge span deformation information when a test load is loaded and removed, and sound wave data emitted by damage of an internal structure of a bridge when the test load passes, and sending the bridge image information, the bridge span deformation information and the sound wave data to a data analysis processing subsystem; the data analyzing and processing subsystem is used for judging the bridge load grade, the bridge working state information and the bridge damage condition according to the data sent by the bridge data collecting subsystem and sending the data to the decision-making subsystem; and the decision subsystem is used for comprehensively evaluating the bridge bearing capacity and the vehicle trafficability according to the data sent by the data analyzing and processing subsystem and assisting in decision making. Whether bridge crossing can be achieved or not can be quickly judged through the system, timeliness is high, the system can conduct investigation on site according to the process, and drawings do not need to be known in advance; the system is arranged on a vehicle, and is high in safety, not prone to damage, convenient to maintain and high in universality.

Aiming at the problem that single interception equipment of a current anti-unmanned aerial vehicle system cannot effectively suppress unmanned aerial vehicles in temporary task allocation, the invention discloses an anti-unmanned aerial vehicle task allocation method based on reinforcement learning. The method comprises the following steps: initializing an improved DQN algorithm which refers to predicting a Q value by adopting a state at the current moment relative to a DQN algorithm; completing the training and optimization of the intelligent agent through an improved DQN algorithm, and storing the network parameters after the training of the intelligent agent is completed; inputting the unmanned aerial vehicle state information S into a reinforcement learning module, and outputting a suboptimal solution X, namely an initial allocation strategy, through reinforcement learning; optimizing the suboptimal solution generated by reinforcement learning through an evolutionary algorithm to generate an optimal solution of target allocation; and decoding the optimal solution to obtain an anti-unmanned aerial vehicle task allocation scheme. According to the method, the agent interception performance trained through the improved DQN algorithm is more accurate, and the task allocation is more efficient and applicable.

A method is provided for connecting an input/output interface of a tester equipped for control unit development to a model of a technical system present in the tester using an already-existing basic test model of a control unit. The input/output interface is designed for connecting a hardware implementation of the control unit or for connecting a technical system to be controlled, and the model to be connected to the input/output interface is a test model of the technical system to be controlled or a test model of the control unit. The already-existing basic test model of the control unit is accessed, and at least one communication requirement is extracted from the basic test model of the control unit.

An urban design pipeline automatically generates design options for an urban design project. The urban design pipeline includes a geometry engine and an evaluation engine. The geometry engine analyzes design criteria, design objectives, and design heuristics associated with the urban design project and then generates numerous candidate designs. The design criteria specify a property boundary associated with a region of land to be developed. The design objectives indicate a specific type of topology that is derived from an existing urban layout. The design heuristics include different sets of construction rules for generating designs with specific types of topologies. The geometry engine generates candidate designs that conform to the property boundary and have topological characteristics in common with the existing urban layout.

The invention discloses an analysis method for improving water temperature of a laminated beam door, The method comprises respectively calculating the vertical water temperature elevation in front ofthe dam which is closest to the discharge water temperature when the laminated beam gate is not in operation and when the laminated beam gate is in operation, then calculating the difference of the discharge water temperature, and taking the difference as the water temperature improvement effect of the laminated beam gate. The technical scheme is adopted, in accordance with that prior art, the thought of the invention is clear, steps are single and clear, through mathematical analysis, A relationship is established between the discharge water temperature and the vertical water temperature infront of the dam, From the point of view of the correlation between the vertical water temperature variation in front of the dam and the representative water intake elevation, the analysis of the water temperature improvement effect of the laminated beam gate is realized, providing a new angle and new method for evaluating the laminated beam gate implementation effect. The analysis algorithm of the invention is based on the measured water temperature data, and the error of the calculation result is not lower than the error of the water temperature measurement, so the calculation precision is greatly improved compared with the calculation precision of the water temperature model.

The invention discloses a test method for testing a P-S-N curve of high-cycle fatigue of an aero-engine material by a small sample amount. The method comprises the steps that same probability distribution points of fatigue lives of same samples under different stress levels in respective parent distribution meet an expression of a formula (4) defined in the specification, and in the formula (4), nji is logarithmic life of the sample i under the jth stress level, mu j is a logarithmic life mean under the jth stress level, sigma j is a logarithmic life standard deviation under the jth stress level, and meanings are same when a subscript j is changed to k; the life sample points under the different stress levels have a one-to-one corresponding relationship; according to the corresponding relationship in the formula (4), the fatigue life on a stress level is equivalent to another stress level, so that sample information aggregation is realized; equivalent large samples are obtained througha small sample test; and according to equivalent large sample data, life distribution parameter statistics is performed. According to the method provided by the invention, based on a sample aggregation principle, fatigue life distribution can be obtained through a small amount of test data, and the relatively accurate P-S-N curve is obtained.

The invention discloses an optimized design method of Gantry-type machine tool stiffness based on segmentation configuration. 3D model of Gantry-type machine is established. Parameter-driven of segmentation configuration modifies and adjust 3D parameter, then a series of 3D model as a structural template can be obtained. A sample library of Gantry-type machine tool can be formed by performance data from finite element analysis. According to the stiffness requirements of the machine tool processing, the initial plan of Gantry-type machine tool structure inputted by the design personnel is optimized based on the basic configuration and segmentation configuration. According the method, the stiffness of Gantry-type construction in early designing stage has been predicted, which provides a reference for designing high stiffness gantry-type structure and reduce the experiment cost of modification and trial production in the process of designing Gantry-type machine tool.

The invention discloses an accurate prediction method and system for horizontal displacement of a concrete faced rockfill dam. The accurate prediction method comprises: obtaining and preprocessing historical measured data of the concrete faced rockfill dam to be measured; classifying environmental factors influencing the horizontal displacement of the concrete faced rockfill dam, and selecting aninput variable of a multiple linear regression model according to the correlation between each influence factor and the horizontal displacement; establishing a concrete faced rockfill dam horizontal displacement prediction multiple linear regression model considering rockfill material delay response and cyclic loading and unloading deformation characteristics, and obtaining a preliminary prediction value of horizontal displacement; and establishing a statistical optimization neural network model and carrying out optimization training, and taking a dependent variable of the multiple linear regression model and the preliminary prediction value as inputs of the statistical optimization neural network model to obtain a horizontal displacement prediction value of the concrete faced rockfill dam. The horizontal displacement of the concrete faced rockfill dam can be accurately predicted, and safe operation of the dam and accessory structures of the dam is guaranteed.

The invention relates to the technical field of intelligent power grids and discloses a safety testing system and method for an intelligent substation. The system comprises an intelligent substation real-time simulation subsystem, an intelligent substation secondary equipment simulation subsystem and an intelligent substation communication simulation subsystem which are in communication connection two by two; an intelligent substation simulation model operates in the intelligent substation; a secondary equipment simulation model operates in the intelligent substation secondary equipment simulation subsystem; an intelligent substation communication protocol operates in the intelligent substation communication simulation subsystem. According to the safety testing system and method, information physical characteristics of the intelligent substation can be fused, the attack and defense safety problem of the intelligent substation can be analyzed through simulation, and development of the information safety technique of the intelligent substation is facilitated.

The embodiment of the invention discloses a block division method in a shoe body design process. The method comprises the following steps: acquiring image data containing a user; identifying the image data to obtain shoe body block division reference information; according to the shoe body block division reference information, determining the number and positions of shoe body blocks and color matching corresponding to each shoe body block; and generating a corresponding shoe body model based on the determined number and position of the shoe body blocks and the color matching corresponding to each shoe body block. According to the scheme, the problems of poor flexibility and low intelligent degree during shoe body design in the prior art are solved, and the color matching blocks of the shoe body can be flexibly divided according to different conditions.

A method for generating a three-dimensional (3D) computer model of an assembly that includes wiring routing, which includes creating a part data structure that defines a part in a virtual product management system. The part data structure includes a plurality of nodes that define at least 3D part design data, 3D wiring routing design data and wiring routing annotation data of the part. The method includes importing at least the 3D part design data, the 3D wiring routing design data and the wiring routing annotation data to the part data structure from a computer-aided design (CAD) model system and generating a 3D computer model of the assembly. The method also includes transmitting the 3D computer model of the assembly to an electronic end user device.

The invention discloses a method for on line monitoring fatigue damage of nuclear grade equipment and pipelines. The key of the method for achieving on-line calculating of a fatigue using coefficient is to calculate the thermal stress field quickly; based on the principle of linear superposition, the Green function method can be used to calculate the thermal stress of structures quickly; on this basis, the fatigue using coefficient can be calculated on line, and the real-time on-line monitoring can be realized; the fatigue using coefficient of the nuclear grade equipment and pipelines can be calculated by using the Green function method; fluid temperature and pressure data needed by calculation are measured in real time by existing or newly added monitoring equipment, and finally fatigue damage assessment results can be output in real time in a display terminal of a main control room; therefore, the technical effects of reducing the conservatism of fatigue calculation and simplifying the fatigue design of the nuclear grade equipment and pipelines are achieved.

The present invention relates to a method for optimizing vehicles' design in terms of safety during crash situations, using a hybrid approach that combines analyzed data such as Finite Element data with methods from the AT fields, comprising the steps of: (a) collecting design data sets which include analyzed data; (b) collecting safety data of existing cars' models; (c) creating an Artificial Neural Network which learns how to predict safety data based on design data sets; (d) creating an optimizer which uses the neural network as a simulator and finds optimized values for design data sets of a new car's design; (e) performing a recurring process of design data set's update, until all parameters of the design data set get their optimized final values.

The invention discloses a uniform-section continuous beam damage identification method based on support influence line for reaction curvature difference. The method comprises the steps of setting a support reaction measurement point at each support of a continuous beam, and obtaining a support influence line for reaction of each support of the continuous beam through applying a moving load; solving the curvature of the support influence line for reaction, further performing difference, and performing damage positioning through sudden change of a curvature difference curve of the support influence line for reaction; and further carrying out damage degree quantification through the difference change of the curvature of support influence line for reaction of the continuous beam. According tothe method, information of the continuous beam before damage is not needed, only the measurement points need to be arranged at the support, the requirement for the number of the measurement points islow, the number of measurement sensors is reduced, damage of the uniform-section continuous beam can be accurately positioned and quantified, and the method is applied to damage evaluation of the uniform-section continuous beam.

The invention discloses a new energy vehicle energy storage optimization control method based on a multi-objective genetic algorithm, which comprises the following steps: establishing a control strategy database of the vehicle-mounted energy storage system; establishing characteristic data module of vehicle energy storage system; establishing the evaluation module of multi-factor coupled energy storage system to evaluate the advantages and disadvantages of the current control strategy in the whole life cycle; a multi-objective genetic algorithm is used to optimize the energy-saving control strategies. By comparing and analyzing the effect of each control strategy, the optimal control strategy of new energy vehicle energy storage is obtained under the coupling of multiple factors. Under thecondition that the passenger comfort degree is ensured, the speed command designed by the invention can realize traction energy saving. The speed command obtained from the final design meets the requirements of non-dominated standards, which is very beneficial to the decision-making based on the time uniform distribution standard and the energy consumption sensitivity standard. Aiming at the energy-saving optimization of speed commands under various control strategies of energy storage system, the optimal control strategy of vehicle-mounted energy storage system can be obtained through the comparative analysis of its effects.