temperature profile during the salting process play an important role in cheese quality since microbial and enzymatic activities, are thereby affected. in this work a three dimensional model was developed for heat transfer in the ultrafilterated cheese by using numerical solution of fourier's second law with finite difference method (explicit scheme) as a function of internal variable (che...

The performance of water flooding can be investigated by using either detail numerical modeling or simulation, or simply through the analytical Buckley-Leverett (BL) model. The Buckley-Leverett analytical technique can be applied to one-dimensional homogeneous systems. In this paper, the impact of heterogeneity on water flooding performance and fractional flow curve is investigated. First, a ba...

Data warehouse systems offer novel techniques and services for data-rich applications both from a data modeling and a data processing point of view. In this paper, we investigate how well state-of-the-art concepts fulfill the requirements of real-world data warehouse applications. Referring to a concrete example from the market research area, key problems with current approaches are identified ...

With the broad development of the World Wide Web, various kinds of heterogeneous data (including multimedia data) are now available to decision support tasks. A data warehousing approach is often adopted to prepare data for relevant analysis. Data integration and dimensional modeling indeed allow the creation of appropriate analysis contexts. However, the existing data warehousing tools are wel...

Today's business environment requires that companies have access to highly relevant information in a matter of seconds. Modern Business Intelligence tools rely on data structured mostly in traditional dimensional database schemas, typically represented by star schemas. Dimensional modeling is already recognized as a leading industry standard in the field of data warehousing although several dra...

An object modeling approach offers advantages in supporting Dimensional Data Modeling (DDM) of data warehouses and data marts. The current approach to making the basic decisions in producing a DDM is a pragmatic one. The pragmatic approach has had considerable commercial success [1], but it still makes tight coupling of strategic goals and objectives to the DDM result a matter of art, rather th...

Keyword search has failed to adequately meet the needs of enterprise users. This is largely due to the size of document stores, the distribution of word frequencies, and the indeterminate nature of languages. The authors argue a different approach needs to be taken, and draw on the successes of dimensional data modeling and subject indexing to propose a solution. They test our solution by perfo...

In this paper we present a hypergraph grammar model for transformation of two and three dimensional grids. The hypergraph grammar concerns the proces of generation of uniform grids with two or three dimensional rectangular or hexahedral elements, followed by the proces of h refinements, namely breaking selected elements into four or eight son elements, in two or three dimensions, respectively. ...

The construction and optimization of the three dimensional model of construction machinery are presented in this work. The decomposition hierarchical structure model of excavator, a kind of typical construction machinery, is accomplished. The reconstruction method for three views of machine parts is proposed based on rapid 3D surface fitting as well as NURBS composite surface. On the other hand...