Dissertation > Excellent graduate degree dissertation topics show

Computing Minimum Distance between Curves/Surfaces Based on PSO Algorithm

Author: GuoZhiHeng
Tutor: PanRiJing
School: Fujian Normal University
Course: Computational Mathematics
Keywords: B-Spline Curve B-Spline Surface Particle Swarm Optimization Algorithm Newton iteration the minimum distance
CLC: O182
Type: Master's thesis
Year: 2011
Downloads: 12
Quote: 0
Read: Download Dissertation


The problems of minimum distance have many applications in lots areas. Nowadays, parametric curves or surfaces are used as the mainstream models in modeling systems. Most former algorithms have a lot flaws, such as:computing methods are complex, the algorithms’application scope are limited. But algorithms of Artificial Intelligence have the advantage of flexibility. They can be applied to the computing of the minimum distances between complicated curves or surfaces. This thesis mainly studies the minimum distance problems of parameter curves or surfaces. The main works and contributions are summarized as follows:According to the principle of the particle swarm optimization algorithm, traditional idea is as follows:each point at a B-Spline curve is set as a particle. Then each point is translated, according to the formulas of the particle swarm algorithm. But the new position, if in this way, may be out of the curve. To solve this problem, the idea of applying the particle swarm optimization to the parametric domain to compute the minimum distance between two B-Spline curves, is proposed. Firstly, the algorithm sets some points in each parametric domain. The points’number in each parametric domain is the same. The points are matched randomly from one parametric domain to the other. Secondly, each pair’s distance and the minimum distance are computed. And each point’s personal parametric best value is computed. Each point’s group’s parametric best value is computed, too. Thirdly, according to the PSO algorithm, after its iteration, each point’s personal parametric best value and group’s parametric best value are renewed. When the algorithm’s termination condition is satisfied, the minimum distance between two B-Spline curves is computed. This algorithm is simple and the experiences show that it has a good effort.According to the analysis of the algorithm’s experiences, an improved algorithm is put forward. The improvement includes the improvement matching ways for two far-away points and the improvement of precision. The experience shows the efficiency is improved by finding the minimum distance pairs. The experience also shows the precision is improved by using Newton iteration.The thesis has extended the methods for computing the minimum distance between two curves to two surfaces. An algorithm for computing the minimum distance between two B-Spline surfaces based on the parametric domain. And an improved algorithm has been put forward. The experiences show that the algorithms have good convergence, efficiency and perception.The thesis also puts forward the algorithm for the minimum distance between two B-Spline surfaces. After the analysis of the experiences, an improved algorithm is put forward. The improved algorithm has the advantage of higher efficiency and better precision.The methods mentioned in the thesis can be applied to many areas, not only B-Spline curves or surfaces, but also other kinds parametric of curves or surfaces. The basic idea can be applied to other kinds parametric of curves or surfaces. The methods can be applied to the distances between points to curves or surfaces, curves to curves or surfaces, surfaces to surfaces and so on. The methods have the meaning for further researches.

Related Dissertations

  1. Active Power Filter and Its Application in Distribution Network,TN713.8
  2. Research on Fuzzy C-Mean Clustering Algorithm Based on Particle Swarm Optimization and Shuffled Frog Leaping Algorithm,TP18
  3. Based on RFID Prison Intelligent Management System Research and Implementation,TP315
  4. The Research on the Target Localization and Tracking Based on WSN,TN929.5
  5. Research on Cultural Algorithm and Its Application in Constrained Optimization Problems,O224
  6. Real algebraic curve rasterization,TP391.72
  7. Strange Nonsymmetric Algebraic Riccati Equation Numerical Solution,O241.6
  8. Research on the Construction of Urban Ecological Function Network in Xiamen City,X171
  9. The Scheduling of Multi-objective Elevator Group Control Algorithm Based on PSO,TU857
  10. The Research of Moving Object Tracking Based on Swarm Intelligence Algorithm,TP391.41
  11. Based on particle swarm optimization algorithm for ship route planning method,TP301.6
  12. Particle Swarm Optimization and Its Application in Rendezvous and Docking of Spacecraft,TP301.6
  13. Application of Wavelet Network in Economic Prediction,F201
  14. Soft-sensor Method of Circulating Ash Utilization in CFB-FGD Process Based on RBF Neural Network,X701.3
  15. Research on Construction of LDPC Codes with Low Error Floor,TN911.22
  16. Research and Simulated Implementation on the Traffic Grooming Schemes in Optical Networks Based on Swarm Intelligence,TN929.1
  17. A Class of Continuous Nonsymmetric Coupled Riccati Equations,O241.6
  18. Quantitative Study on Ultrasonic Evaluation of Flaws in the Concrete,TU375
  19. The Hermitian Positive Definite Solutions of Nonlinear Equation X+A*X-2A=Q,O151.21
  20. The Applications of Flame Detection Based on DSP Systems in Engineer,TP274.4

CLC: > Mathematical sciences and chemical > Mathematics > Geometry, topology > Analytic Geometry
© 2012 www.DissertationTopic.Net  Mobile