Dissertation > Excellent graduate degree dissertation topics show

A Complex Three-dimensional Geometric Modeling Method Based on Quadric Surface

Author: ZhangHua
Tutor: WuZhenSen
School: Xi'an University of Electronic Science and Technology
Course: Radio Physics
Keywords: Quadric Parameter fitting PSO Geometric modeling Laser fuze
CLC: TP391.72
Type: Master's thesis
Year: 2011
Downloads: 47
Quote: 0
Read: Download Dissertation

Abstract


A three-dimensional target surface geometry modeling method based on quadric is studied in this paper. Three-dimensional geometric modeling method is to use the plane unit and the quadric (cylinder, cone, and ellipsoid) unit as the fundamental elements of the geometric modeling. The geometric modeling method is based on a new unified equation of quadric, the parameters of this equation have a clear geometric meaning, which express the intention of the geometric modeling and modeling process. The segmentation based on quadric, parameter fitting, as well as coordinate transformation, blanking and other modeling techniques are studied. The particle swarm algorithm is used to simply fit parameters of quadric. TGM geometric modeling software is introduced, based on this software the quadric geometric modeling is mainly studied. Because of the flexibility of the shape of the quadric, quadric geometric modeling can use less number of patches to obtain a more accurate representation of target. Because of the advantages of the quadric geometric modeling, the near-field characteristics of target echo of laser fuze is calculated based on the modeling method. The plane unit and the quadric(cylinder, cone, and ellipsoid)unit is used to approximate the surface of the three-demensional target geometry model, based on the surface material of the target and the measured BRDF data, the five-parameter statistical modeling is perfoermed by used of genetic optimizatiom algorithm. Target echo signal of laser fuze is calculated using the parameters and intersection of the fuze. This method is of short time and good effect.

Related Dissertations

  1. Based on RFID Prison Intelligent Management System Research and Implementation,TP315
  2. Research on Supply-production-distribution Planning Model with Variable Cycle for Petro-chemical Products Based on DE-PSO Algorithm,F426.72;F224
  3. Based on wavelet and neural network theory of power system load forecasting,TM715
  4. Improvement and Application of Particle Swarm Optimization,TP18
  5. Research on Fundus Image Fusion and System Implementation,TP391.41
  6. Design and Implementation of Virtual Mine,TD214
  7. The Study of Intelligent Control Method for Traffic Signal of Urban Single Intersection,U491.51
  8. Application Research of Fuzzy Neural Network in Elevator Group Control System,TP273.4
  9. Whole Life Cycle Cost Estimate Method Based on Intelligent Integration,F284
  10. Three-Dimensional Modeling of Field Archaeology Excavation Unit from Cross-Sections,P208
  11. Integration and optimization of the secondary distribution network in the supply chain management,F224
  12. Intelligent Optimization Task Scheduling Algorithm Research and Application,TP301.6
  13. Based on S3C2440 Embedded Linux System Research and Application,TP316.81
  14. Based on Pro / ENGINEER software for three-dimensional modeling of discrete element method Boundary,TP391.72
  15. Hybrid particle swarm optimization and differential evolution algorithm,TP301.6
  16. Based on radiative transfer model to extract information of the blade components,TP701
  17. Long- range submersibles intelligent motion control technology,TP273.5
  18. Study on Identification Methods of Uniariate and Their Engineering Application,TP273
  19. Particle Filter Algorithm,TN713
  20. Swarm Intelligence Algorithms and Their Application on Nagivation Plan for Underwater Vehicle,U675.7
  21. Low-voltage power line carrier communication network research,TM73

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Machine-assisted technology > Machine -aided design (CAD), aided drawing
© 2012 www.DissertationTopic.Net  Mobile