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589 results about "Graph drawing" patented technology

Graph drawing is an area of mathematics and computer science combining methods from geometric graph theory and information visualization to derive two-dimensional depictions of graphs arising from applications such as social network analysis, cartography, linguistics, and bioinformatics.

Three-dimensional terrain model real-time smooth drawing method with combination of GPU technology

InactiveCN105336003ATroubleshoot preprocessing issuesEliminate noise3D modellingVideo memoryEngineering
The invention provides a three-dimensional terrain model real-time smooth drawing method with combination of a GPU technology, and belongs to the technical field of image processing. The objective of the invention is to provide the three-dimensional terrain model real-time smooth drawing method with combination of the GPU technology so that cache reuse in multiple times of drawing can be realized based on the current popular programmable GPU technology with a global digital elevation model acting as a data source, and load of computation space is effectively reduced. The method comprises the steps of construction of a multi-resolution pyramid model, elimination of image noise points, filtering of images, partitioning of planar projection of the earth according to equal latitude and longitude, and construction of different hierarchical levels of pyramid layers according to a mode from the top to the bottom. Acceleration and enhancement of terrain rendering are realized based on the programmable GPU technology, i.e. all phases of a graphical drawing pipeline are controlled by using shader languages, two and textures are respectively generated by vertex information and index information of elevation data to be stored in video memory for scheduling of whole terrain drawing; and vertex interpolation and migration are performed in the geometric phase by utilizing a curved surface subdivision and fractal technology so that procedural details are generated and the phenomenon of edges and corners of the terrain mesh when resolution is insufficient can be compensated.
Owner:PLA AIR FORCE AVIATION UNIVERSITY

Train control system vehicular device simulation testing system

The invention relates to a CTCS-3 level train control system vehicular device simulation testing system and testing method. The system provides a user interface for selecting and executing a testing script, a vehicular device is tested by simulating running of a train on a line, and data in the testing process are recorded and used for subsequent analysis. The simulation testing system comprises a scene controller module, a train dynamics simulation module, a ground equipment simulation module, a data recording module, a station graph drawing module and a GUI (graphical user interface) module, wherein the scene controller module is used for reading and distributing the testing script and the testing data and controlling the testing process, the train dynamics simulation module is used for calculating the speed and the distance of the rain running on the line, the ground equipment simulation module is used for transmitting rail circuit information, transponder messages and wireless messages to the tested vehicular device, the data recording module is used for recording various testing result data, the station graph drawing module is used for drawing a station graph and displaying the position of the train on the line, and the GUI module is used for providing input testing initial information for testers, simulating driving of the train and repeating a graphical interface for the running state of the train in the testing process.
Owner:CHINA RAILWAYS CORPORATION +1

Digital simulation and synthesis technology with artistic style of Yunnan heavy-color painting

The invention relates to non-photorealistic rendering in computer graphics, in particular to digital simulation and synthesis with artistic style of Yunnan heavy-color painting, and belongs to the technical field of non-photorealistic graphic rendering. The digital simulation and synthesis are characterized in that: the digital simulation and synthesis comprise an establishment and management module of a Yunnan heavy-color painting basic graphic element library, a graphic element library-based Yunnan heavy-color painting traditional delineation drawing rendering module, and a Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module. The basic graphic element library is used for providing graphic elements needed by foreground traditional delineation drawings, such as hair, facial forms, trunks and the like. The Yunnan heavy-color painting traditional delineation drawing rendering module can select appropriate graphic elements from the graphic element library to combine the graphic elements by layers so as to generate the Yunnan heavy-color painting traditional delineation drawings. In order to harmoniously collocate all the graphic elements, a system provides multiple kinds of operation for the graphic elements, such as translation, selection, scaling and the like and can modify the shapes of the graphic elements at the same time. The Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module is in charge of coloring the traditional delineation drawings, and the effects of coloring can reflect texture characteristics and color characteristics in an original drawing of the heavy-color painting, and special characteristic simulation of the Yunnan heavy-color painting, such as character edge hollow sense, background fusion and the like is realized.
Owner:YUNNAN UNIV

Data analyzing and processing system

The invention belongs to the field of monitoring measurement and provides a data analyzing and processing system. The system comprises a data storage and management module, a graphing module, a regression calculation module, a predicting analysis module and a surrounding rock health judging module, wherein the data storage and management module is used for storing multivariate data of tunnel monitoring and conducting various management like adding, inquiring and deleting, the graphing module is used for graphing and monitoring various curve graphs according to the monitoring data, the regression calculation module is used for conducting regression calculation to the measured data curves through different functions, the prediction analysis module is used for predicting and judging the stability of surrounding rock and a supporting structure and correcting designing parameters to guide the construction according to the comparison and analysis between the measured data curves and the original measured curves, and the surrounding rock health judging module is used for providing solutions according to the deformation value of the surrounding rock in the monitoring data or the abnormally abrupt change point and according to construction management grades. The system combines the redundance and the complementary information between sensors according to rules, achieves the monitoring to the environment, raises a safety alarm, improves working efficiency of managers and strengthens the safety of the tunnel construction.
Owner:CHANGAN UNIV

Method for drawing joint scheduling graph of step reservoir

InactiveCN102080366ASolve the production methodComply with the scheduling operation modeWater-power plantsConventional hydroenergy generationHydropowerGraph drawing
The invention discloses a method for drawing a joint scheduling graph of a step reservoir. The method comprises the following steps of: drawing an initial scheduling graph of each reservoir according to designed guaranteed power output of each hydropower station progressively from upstream to downstream by an equi-output method and according to a single reservoir scheduling graph drawing method; drawing an initial scheduling graph for joint scheduling of a step leading reservoir; performing optimization calculation on the joint scheduling graph of the step reservoir; calculating the water power of each hydropower station from top to bottom in a water power sequence according to the initial scheduling graph by taking a long-series history runoff process as an input and taking a period of ten days as a calculation interval, and optimizing scheduling lines in the joint scheduling graph of the step reservoir; and outputting a last joint scheduling graph of the step reservoir and a scheduling rule. Indicated power output in a step joint scheduling graph is used for coordinating, so that complementary scheduling effect of the step reservoir is brought into full play, damage depth of the reservoir is reduced and the utilization ratio of water power is increased.
Owner:STATE GRID ELECTRIC POWER RES INST

Node relation graph displaying method and system based on HTML5

The invention provides a node relation graph displaying method and system based on an HTML5. The method comprises the steps that a user inputs or a website server background returns graph data of a node relation graph, wherein the graph data is of a specific json format; a data input module obtains corresponding json graph data and stores the data temporarily; through utilization of new features of the HTML5, a graph drawing module is established and initial blank canvas is established; the json graph data is resolved through utilization of a JavaScript program resolver; the graph drawing module sets an initial position of nodes according to the resolved graph data and draws the nodes; the graph drawing module draws corresponding node connecting lines according to the drawn node graph and the corresponding graph data; a graph element event processing module sets mouse events of graph elements according to the graph data; and a graph output module outputs a graph to a webpage, and the node relation graph is displayed to the user. According to the method and the system, through utilization of a canvas function of the HTML5 and the mouse events of various graph elements supported by an html page, the node relation graph is efficiently and clearly displayed on the webpage through the graph data of the specific format.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

System for automatically analyzing computer network connectivity

The invention discloses a system for automatically analyzing computer network connectivity, wherein the system acquires the connectivity of any two hosts alive in a network by analyzing configuration files of a device (which is mainly a firewall) influencing the connectivity in the network, and comprises a human-machine interaction part, an information acquisition part, an information preprocessing part, a core analysis part and a connected graph drawing part. The human-machine interaction part is used for realizing the interaction between a user and system information; the information acquisition part is used for completing the acquisition of the configuration files of the firewall and the detection of hosts alive in the network; the information preprocessing part is used for preprocessing information acquired by the information acquisition part; the core analysis part is used for analyzing a result generated by the information preprocessing part and acquiring the connectivity information between any two hosts alive; and the connected graph drawing part is used for drawing a network connected graph. The system disclosed by the invention is high in operating speed and basically free from network scale, can be applied to large-scale networks and further has the advantages of high automation degree, wide application range and strong expandability.
Owner:SHANGHAI JIAO TONG UNIV

3D (Three-Dimensional) graphic animation engine

The invention provides a 3D (Three-Dimensional) graphic animation engine. The 3D graphic animation engine comprises a 3D graphic processing module and an OpenGL (Open Graphics Library) bottom layer, wherein the 3D graphic processing module can provide a large amount of geometric calculations and is used for establishing and leading in various meshing models, and the OpenGL bottom layer is used for realizing the drawing and the rendering of a graph; the 3D graphic processing module and the OpenGL bottom layer are encapsulated; the 3D graphic processing module comprises a view, a module and an iterator; the view is an interface which is used for connecting the module and the iterator; the module comprises a public data area, a data interface and a graph drawing interface, the public data area is used for storing public data of the module, the data interface is used for providing a method for a mobile phone operation system and/or a parent module of the module to modify the public data in the public data area, and the graph drawing interface is used for realizing module drawing by the mobile phone operation system during a drawing thread according to the public data of the public data area. The 3D graphic animation engine provided by the invention is suitable for mobile phone operation systems and can be used for effectively and smoothly displaying all kinds of two-dimensional or three-dimensional graphic animations.
Owner:GUANGZHOU JIUBANG DIGITAL TECH
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