ITIL: Interlaced Topologically Interlocking Lattice for continuous dual-material extrusion

Extrusion of Ecc-material

An extrusion process especially designed for extrusion of pipes made from fiber reinforced cementitious materials has been developed at Department of Structural Engineering and Materials at the Technical University of Denmark. Engineered Cementitious Composite (ECC) materials have been developed in recent years at Department of Civil and Envirionmental Engineering, University of Michigan. These...

Dual Topologically Adaptable Snakes

The original Snake model suffers from the strong sensitivity to the initial contour position and can not deal with topological changes. The T-Snake is an approach to relieve the problem of topological changes by embedding the snake model in the framework of a simplicial decomposition of the domain. In this work we propose a new approach by incorporating a generalized dual contour approach in th...

Topologically invariant transformation for lattice fermions

A transformation is devised to convert any chirally non-invariant lattice Dirac fermion operator into Ginsparg-Wilson Dirac fermion operator. For the standard Wilson-Dirac lattice fermion operator, the transformed new operator is local, free of O(a) lattice artifacts, has correct axial anomaly in the vacuum sector, and is not plagued by the notorious problems ( e.g., additive mass renormalizati...

Topologically Left Invariant Mean on Dual Semigroup Algebras

Creating Topologically Consistent 3D City Models of LOD+ with Extrusion

There are many methods to create 3D city model, in which the simplest one is to extrude building footprints to obtain “block-shaped” polyhedra representing buildings. While the resulting 3D city models are not topologically consistent, if the 2D topological relationships between the footprints are not taken into account. As a result, the created models only meet the purpose of visualization. In...