时间：2014年12月8日，星期一，下午14:30 --17:30
地点：中科大管理科研楼1208室
报告一
Title: Design and Fabrication Using Wire Meshes
报告人：Bailin Deng (EPFL, Lausanne, Switzerland)
Abstract:
Wire meshes consist of interwoven metal wires arranged in a regular grid. Despite their widespread use in art, architecture, and engineering, it remains challenging to design and fabricate freeform shapes using wire meshes. One major difficulty is the global nature of wire mesh shapes: small changes in one region might induce drastic deformation in other regions. In this talk, I will show how wire meshes can be modeled as discrete Chebyshev nets, which helps us to gain insights into their feasible shapes and to develop a computational design system for wire meshes. Moreover, I will present a method to physically realize freeform wire mesh shapes with the help of digital fabrication tools. Finally, I will discuss some open problems in this domain.
报告二
Title: Assembling Self-Supporting Structures
报告人：Mario Deuss (EPFL, Lausanne, Switzerland)
Abstract:
Self-supporting structures are prominent in historical and contemporary architecture due to advantageous structural properties and efficient use of material. Computer graphics research has recently contributed new design tools that allow creating and interactively exploring self-supporting freeform designs. However, the physical construction of such freeform structures remains challenging, even on small scales. Current construction processes require extensive formwork during assembly, which quickly leads to prohibitively high construction costs for realizations on a building scale. This greatly limits the practical impact of the existing freeform design tools. We propose to replace the commonly used dense formwork with a sparse set of temporary chains. Our method enables gradual construction of the masonry model in stable sections and drastically reduces the material requirements and construction costs. We analyze the input using a variational method to find stable sections, and devise a computationally tractable divide-and-conquer strategy for the combinatorial problem of finding an optimal construction sequence. We validate our method on 3D printed models, demonstrate an application to the restoration of historical models, and create designs of recreational, collaborative self-supporting puzzles.
报告三
Title: The Future of 3D Acquisition and Design.
报告人：Sofien Bouaziz (EPFL, Lausanne, Switzerland)
Abstract:
Recent technological advances in RGB-D sensors have made low cost 3D acquisition systems such as the Microsoft Kinect available to consumers. The purchase of PrimeSense-the company behind the Kinect technology-by Apple, and the integration of RGB-D sensors into upcoming mobile devices by Intel and HTC provide a glimpse into the future ubiquity of 3D acquisition devices in our everyday life. Concurrently to 3D acquisition, we are witnessing a revolution in digital fabrication with the development of efficient and accurate 3D printers. In recent years, 3D printing has been transformed from a simple curiosity into a mainstream manufacturing technique. With the development of inexpensive 3D printers, this technology is now within reach of consumers.The promise of this 3D technological revolution can only be met with fundamental advances in digital geometry processing. In the next 10 years, we will experience an explosion in the use of geometric data and a fast expansion of digital 3D content. In this talk I will present computational tools addressing the growing demand of unified, efficient and robust geometry processing algorithms facilitating the transformation, analysis, and simulation of 3D data.
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