In this paper a method for three-dimensional modeling of the human vocal tract based on T1-weighted MRI data sets is introduced. This includes the reconstruction of the vocal tract shape and the computation of the vocal tract midline. Reconstruction of the vocal tract shape is realized by three-dimensional region growing within the vocal tract after teeth phantoms are matched into the MRI data ...

Numerical simulation of threedimensional groundwater flow near lakes shows that the continuity of the boundary encompassing the local groundwater flow system associated with a lake is the key to understanding the interaction of a lake with the groundwater system. The continuity of the boundary can be determined by the presence of a stagnation zone coinciding with the side of the lake nearest th...

Information retrieval (IR) is a key component of knowledge management systems (KMSs). KMSs frequently rely on keyword searches as a primary mechanism for retrieval. While keyword searches are very helpful to knowledge workers, they have their limitations. To illustrate some of the limitations of keyword searches, a database containing all of the articles that have appeared in MIS Quarterly was ...

With the development of distributed computing technology, there remain some important problems of collaborative control in distributed multi-user data sharing: heterogeneous environment, data consistency and concurrent operation. To solve the sharing issues in drilling engineering, this paper introduces a method of realizing information sharing by combining the advantages of multi-agent collabo...

Results of numerical simulations of matter flows in a semidetached binary system similar to the low-mass X-ray binary X1822–371 are presented. Three-dimensional modeling of the mass transfer gas dynamics makes it possible to investigate gas streams in the system and to study the influence of a common envelope. The presence of the common envelope leads to the absence of shock interaction between...

A regulator problem for a heat conduction system, of which the eigenstructure is just partially known, is formulated to design a stabilizing controller that keeps a performance index less than a prescribed value. The index is made of the spatio integral of the squared deviation from reference temperature distribution. It is shown that through characterizing frequency response from input to temp...

Two methods of grid based and image based modeling were put forward respectively to represent the landform of watersheds on the Loess Plateau, China. Many kinds of spatial data such as Digital Elevation Model (DEM), Remote Sensing (RS) images, and photos are utilized to establish the digital 3-D terrains of watersheds on the Loess Plateau, which provides 3-D virtual geographic environments for ...

1 School of Chemical Machinery, Dalian University of Technology (No.2 Linggong Road, Gangjingzi District, Dalian City, Liaoning Province, 116024, China) E-mail: [email protected] 2Fellow Member of JSCE, Professor, Dept. Environmental Science & Technology, Tokyo Institute of Technology (Nagatsuta 4259, Midori-ku, Yokohama, 226-8502, Japan) E-mail: [email protected] 3Member of JS...

The paper presents LGS, a geometric solver by LEDAS for systems requiring solving of geometric problems with constraints. LGS is presently a stable marketable product, and so the paper focuses on the future of LGS, such as possible development paths and applications to real tasks. Apart from the traditional use in large parametric CAD systems, possibilities for integrating the solver in small C...