Terrain viewshed analysis based on the digital elevation model (DEM) is of significant application value. A lot algorithms have been proposed, including R3 as accurate one and others efficient ones. The algorithm because its comprehensive but time-consuming computation, while are due to proper approximation. However, no capable taking advantage both until which a ‘proximity-direction-elevation’...

the aim of this paper is to develop a rapid, and highly sensitive quantitative hplc fingerprint method with multiple indicators by using the compound chinese medicine wuwei changyanning granule and 5 herbs in the prescription. the quantitative fingerprint chromatogram with multiple indicators was investigated. ⅰ)6 compositions included rutin, gallic acid, chlorogenic acid, atractylenolideⅰ, pac...

Located on the picturesque shores of Lake Geneva, freshly inaugurated Bernoulli Center for Fundamental Studies at École Polytechnique Fédérale de Lausanne (EPFL) hopes to become a beacon advancement fundamental research in mathematics, theoretical physics, and computer science.

Viewshed (or visibility map) computation is an important component in many GIScience applications and, as nowadays there are huge volume of terrain data available at high resolutions, it is important to develop efficient algorithms to process these data. Since the main improvements on modern processors come from multi-core architectures, parallel programming provides a promising means for devel...