Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 84 for “"polyhedra"”.
-
Flexible polyhedra - Exploring finite mechanisms of triangulated polyhedra
… to design novel deployable structures, flexible polyhedra provide interesting insights. This work follows the discovery of flexible polyhedra and aims to make flexible polyhedra more useful. The dissertation describes how flexible polyhedra can be made. The flexible polyhedra first considered in …
-
Edge length minimizing polyhedra
… edge length minimization problems on convex polyhedra: first, minimizing edge length for fixed volume (Melzak's Problem), and second, minimizing edge length for fixed surface area (Aberth's Problem). Specific examples are given that demonstrate the necessity of restricting the problems to …
-
Smooth Isotopies of Manifolds Surrounding Polyhedra
Made available in DSpace on 2014-12-09T22:17:51Z (GMT). No. of bitstreams: 1 6915397.pdf: 2258574 bytes, checksum: 4cf81ed0c3058278598374fe1f09f251 (MD5) Previous issue date: 1969
-
Polyhedra and algorithms for the General Routing Problem
Das General Routing Problem ist ein auf ungerichteten Graphen definiertes NP-schweres kombinatorisches Optimierungsproblem. Es handelt sich um eine geringfügige Verallgemeinerung des besser bekannten Rural Postman Problem (siehe z.B. Garey & Johnson 1979), zu dem es tatsächlich sowohl theoretisch …
-
Vertex enumeration and counting for certain classes of polyhedra
… degeneracy such as frequently occurs in network polyhedra. Provan [79] gives a high-level description of a VE algorithm for such polyhedra which has running time that is quadratic in the number of vertices. W e describe an implementation of Provan's algorithm, present some computational results …
-
Assemblies of Metal-Organic Polyhedra: Synthesis, Properties and Characterization
Metal-Organic Polyhedra (MOP) are nanoscale capsule-like supramolecular architectures composed of metal ions and organic linkers. They have well defined cavities depending on the ligand shape and metal-vertex geometry. The thesis concerns MOP composed of 12 copper(II) dimers (Cu24) and 24 …
-
Rapid detection of shallow penetration between non-convex polyhedra
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
-
Bonding properties of coordinated polyhedra in molecules and crystals
… electron density distributions in coordination polyhedra in molecules and crystals are modeled using Hartree-Fock molecular orbital methods. Model bond-stretching force constants calculated for coordination polyhedra in a series of nitride, oxide and sulfide molecules are ~ 10-20% larger than …
-
Polyhedra Study of Mixed Integer Programs With Variable Upper Bounds
We investigate the convex hull of the set defined by a single constraint with continues and binary variables and in addition, variable upper bound constraints are present. We introduce the flow cover inequality, which is valid for a projection. We also give conditions under which this inequality is …
-
The response of polyhedra in close packed structures to temperature and pressure
… coefficients calculated for the constituent polyhedra shows that the distortion of a material with a close packed structure is governed by its unoccupied as well as its occupied polyhedra. It also indicates that the rearrangement of the anions in such materials induced by an increase in P is …
-
Enhancements and computational evaluation of the hit-and-run random walk on polyhedra
The symmetry function of a convex set offers us numerous useful information about the set in relation to probabilistic theory and geometric properties. The symmetry function is a measure of how symmetric the convex set is, and for a point, intuitively it measures how symmetric the set is with …
-
Data analysis to understand coordination and topological environments in oxides
… of cations and topology of coordination polyhedra in oxides. We calculate the coordination environment preferences of several common cations in oxides, identifying lithium, sodium, calcium, and magnesium ion's preferred coordination numbers are 4- fold/6-fold, 6-fold, 6-fold, and …
-
Os poliedros por uma perspectiva diferente: Origamis, papercrafts, canudos, softwares e jogo.
… area of teaching geometry, specificity, content Polyhedra. Our goal was born from the experience we had in the course of supervised IV, offered by the Federal University of Paraiba, Distance Learning mode, which reported that qualitatively the scope of our work of Course Completion (TCC) in the …
-
Static analysis for detecting and avoiding floating-point run-time errors in logic programs
… of floating-point expressions into the polyhedra domain as well as into the finite powerset of polyhedra domain. Moreover, this thesis aims at presenting a forward and a backward analysis for the detection and inference of floating-point errors such as overflow and division by zero. …
-
Polyhedra:representation and recognition
… the representation uniquely represents genus 0 polyhedra. We show by,example that our representation is not a strict dual of the vertex connectivity graph, and hence is not necessarily ambiguous. However, we have not been able to prove that the representation is unambiguous. An augmented dual …
-
Poliedros de Platão
… pupils the interest for special geometry in the Polyhedra of Platão, being shown that the study of the subject it can be understood of practical, dynamic and amused form. In such a way we can: historically to point out regular Geometry, Platão and its polyhedra, to identify platonic solids, to …
-
Understanding Ancient Math Through Kepler: A Few Geometric Ideas from The Harmony of the World
… in their construction form solid shapes (polyhedra) having origins though Platonic philosophy and Archimedean works. Kepler gives two additional polyhedra, and a simple means for constructing the “divine” proportion is given.
-
Polyhedral Computation for Differential System Analysis and Control
In this thesis we investigate the use of polyhedra in the analysis and design of dynamical systems. The main motivation behind the use of polyhedra in this context is that they can, in principle, provide arbitrarily tight conditions on stability, monotonicity, and some system gains for a large …
-
A two and three dimensional high school geometry unit implementing recommendations in the National Council of Teachers of Mathematics curriculum and evaluation standards
… for triangles, quadrilaterals, polyhedra, polygons, Eulers Formula, and platonic solids.
Page 1 of 5