In representing automobile parts with mesh in the field of reverse engineering or finite element generation, the mesh reconstruction and data exchanging between different CAD/CAM systems often introduce many invisible...In representing automobile parts with mesh in the field of reverse engineering or finite element generation, the mesh reconstruction and data exchanging between different CAD/CAM systems often introduce many invisible topological and geometrical errors into mesh. These artifacts can cause serious problems in subsequent operations such as finite element analysis, reverse engineering, animation, and simulation. In this study we propose a practical method for repairing topological and geometrical errors on mesh. First, coincident vertices during mesh input are removed, fol- lowed by the identification of non-manifold vertices and edges. The non-manifold vertices are modified, and the facets having non-manifold edges are removed. Finally, faces that have the wrong orientations in the mesh are re-oriented. Experiments show that our methods can eliminate most common mesh errors quickly and effectively. The refined mesh can be properly used in subsequent operations.展开更多
An archaeometric analysis of the James Ossuary inscription “James Son of Joseph Brother of Jesus” strengthens the contention that the ossuary and its engravings are authentic. The beige patina can be observed on the...An archaeometric analysis of the James Ossuary inscription “James Son of Joseph Brother of Jesus” strengthens the contention that the ossuary and its engravings are authentic. The beige patina can be observed on the surface of the ossuary, continuing gradationally into the engraved inscription. Fine long striations made by the friction of falling roof rocks continuously crosscut the letters. Many dissolution pits are superimposed on several of the letters of the inscription. In addition to calcite and quartz, the patina contains the following minerals: apatite, whewellite and weddelite (calcium oxalate). These minerals result from the biogenic activity of microorganisms that require a long period of time to form a bio-patina. Moreover, the heterogeneous existence of wind-blown microfossils (nannofossils and foraminifers) and quartz within the patina of the ossuary, including the lettering zone, reinforces the authenticity of the inscription.展开更多
Nanjing Automation Research Institute (NARI) is a specialized institute that engages in the researches of automation of electric mper system and its application. The paper introduces the architecture of NARI Intranet ...Nanjing Automation Research Institute (NARI) is a specialized institute that engages in the researches of automation of electric mper system and its application. The paper introduces the architecture of NARI Intranet as well as the techniques and application development on the Intranet. The first stage network of NARI and the building and the second stage network are both introduced. We lay emphasis on the system softWare used in NAm intranet, network management software developed by ourselves according to the characteristic of NARI network users, technique characteristics of application system on this platform and its running status. The paper also discusses the further development of NARI network application.展开更多
The signing ceremony between the NARI Group Corporation and the EEBUS Initiative was held in Beijing on April 17, marking that NARI officially became the first Chinese member of the EEBUS.
Established in 1979 and situated in Nanjing, Jiangsu Province, Nanjing Automobile Research Institute (NARI) is not only a R & D base for Yuejin Motor (Group) Corporation (YMGC) in the field of new product, new mat...Established in 1979 and situated in Nanjing, Jiangsu Province, Nanjing Automobile Research Institute (NARI) is not only a R & D base for Yuejin Motor (Group) Corporation (YMGC) in the field of new product, new materials & new technologies and test techniques, but also a state-identified organization for展开更多
文摘In representing automobile parts with mesh in the field of reverse engineering or finite element generation, the mesh reconstruction and data exchanging between different CAD/CAM systems often introduce many invisible topological and geometrical errors into mesh. These artifacts can cause serious problems in subsequent operations such as finite element analysis, reverse engineering, animation, and simulation. In this study we propose a practical method for repairing topological and geometrical errors on mesh. First, coincident vertices during mesh input are removed, fol- lowed by the identification of non-manifold vertices and edges. The non-manifold vertices are modified, and the facets having non-manifold edges are removed. Finally, faces that have the wrong orientations in the mesh are re-oriented. Experiments show that our methods can eliminate most common mesh errors quickly and effectively. The refined mesh can be properly used in subsequent operations.
文摘An archaeometric analysis of the James Ossuary inscription “James Son of Joseph Brother of Jesus” strengthens the contention that the ossuary and its engravings are authentic. The beige patina can be observed on the surface of the ossuary, continuing gradationally into the engraved inscription. Fine long striations made by the friction of falling roof rocks continuously crosscut the letters. Many dissolution pits are superimposed on several of the letters of the inscription. In addition to calcite and quartz, the patina contains the following minerals: apatite, whewellite and weddelite (calcium oxalate). These minerals result from the biogenic activity of microorganisms that require a long period of time to form a bio-patina. Moreover, the heterogeneous existence of wind-blown microfossils (nannofossils and foraminifers) and quartz within the patina of the ossuary, including the lettering zone, reinforces the authenticity of the inscription.
文摘Nanjing Automation Research Institute (NARI) is a specialized institute that engages in the researches of automation of electric mper system and its application. The paper introduces the architecture of NARI Intranet as well as the techniques and application development on the Intranet. The first stage network of NARI and the building and the second stage network are both introduced. We lay emphasis on the system softWare used in NAm intranet, network management software developed by ourselves according to the characteristic of NARI network users, technique characteristics of application system on this platform and its running status. The paper also discusses the further development of NARI network application.
文摘The signing ceremony between the NARI Group Corporation and the EEBUS Initiative was held in Beijing on April 17, marking that NARI officially became the first Chinese member of the EEBUS.
文摘Established in 1979 and situated in Nanjing, Jiangsu Province, Nanjing Automobile Research Institute (NARI) is not only a R & D base for Yuejin Motor (Group) Corporation (YMGC) in the field of new product, new materials & new technologies and test techniques, but also a state-identified organization for
