Results 281 to 290 of about 177,351 (312)

Structure−Activity Landscape Index:  Identifying and Quantifying Activity Cliffs

Journal of Chemical Information and Modeling, 2008
A new method for analyzing a structure-activity relationship is proposed. By use of a simple quantitative index, one can readily identify "structure-activity cliffs": pairs of molecules which are most similar but have the largest change in activity. We show how this provides a graphical representation of the entire SAR, in a way that allows the salient
Rajarshi Guha, John H. Van Drie
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A new landscape expansion index: definition and quantification

Acta Ecologica Sinica, 2012
Landscape patterns,processes and functions are the main contents of landscape ecology,and they are interdependent and interacting.Landscape patterns and their dynamics has always been an important scientific issue of landscape ecology.Landscape pattern index is the most widely used method among the existing research methods in landscape patterns ...
武鹏飞 WU Pengfei, 周德民 ZHOU Demin, 宫辉力 GONG Huili   +2 more
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Construction of landscape ecological evaluation index system

2011 International Symposium on Water Resource and Environmental Protection, 2011
As urban construction development, urban landscape ecological environment is drawing wide attention. Therefore, it is important to build urban landscape ecological evaluation system adapt to city development. This paper comprehensively studied major problems in urban landscape construction.
null Jinxuan Wang, null Xinyi Zou, null Zhoufeng Wang   +2 more
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Landscape cohesion: an index for the conservation potential of landscapes for biodiversity

2003
In urbanising landscapes, planning for sustainable biodiversity occurs in a context of multifunctional land use. Important conditions for species persistence are habitat quality, the amount and configuration of habitat and the permeability of the landscape matrix. For planning purposes, these determinants should be integrated into simple indicators for
Opdam, P.F.M., Verboom, J., Pouwels, R.
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Estimating Landscape Imperviousness Index From Satellite Imagery

IEEE Geoscience and Remote Sensing Letters, 2006
This letter presents a practical method for landscape imperviousness estimation through the synergistic use of Landsat Enhanced Thematic Mapper Plus (ETM+) and high-resolution imagery. A 1-m resolution color-infrared digital orthophoto was used to calibrate a stepwise multivariate statistical model for continuous landscape imperviousness estimation ...
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The Satoyama Index: A biodiversity indicator for agricultural landscapes

Agriculture, Ecosystems & Environment, 2011
Abstract Agricultural development to meet rapidly growing demands for food and biofuel and the abandonment of traditional land use have had major impacts on biodiversity. Habitat diversity is one of the most important factors influencing biodiversity in agricultural landscapes.
Taku Kadoya, Izumi Washitani
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Soil Landscapes, an Index to Multiple use

Journal of Forestry, 1966
Abstract In order to develop good multiple-use plans for any area, it is necessary to know the potential of the land for various uses. This paper presents how soil landscapes may serve as a starting point or as an index to multiple-use planning. Examples are presented at the project or compartmental level and for a ranger district on
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Application of the topographic position index to heterogeneous landscapes

Geomorphology, 2013
Topographic position index (TPI) is an algorithm increasingly used to measure topographic slope positions and to automate landform classifications. We applied TPI to a geoarchaeological research project in northwestern Belgium but its use led to erroneous landform classifications in this heterogeneous landscape.
Jeroen De Reu, Jean Bourgeois, Machteld Bats, Ann Zwertvaegher, Vanessa Gelorini, Philippe De Smedt, Wei Chu, Marc Antrop, Philippe De Maeyer, Peter Finke, Marc Van Meirvenne, Jacques Verniers, Philippe Crombé   +12 more
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Ecological Integrity Evaluation Based on Landscape Index

2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering, 2012
The impacts of land use on ecosystem have received high attention in global environmental change. Different land use patterns and intensities play significant impact on ecological integrity, which can be directly reflected on ecosystem composition and structure.
Dingxuan Zhang, Meichen Fu, Chunyan Du
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Landscape Tension Index

2015
Brian Lee, James Adams, Stephen Austin
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