Results 81 to 90 of about 1,724,437 (198)

Research of Hybrid Spatial Index Technology in 3DGIS

Gong-kuang zidonghua, 2010
In view of bad performance of single index technology in 3D space, advantages and disadvantages of octree and classic R-tree were analyzed. A hybrid index technology combining octree and R-tree was proposed which was named ORSI.
WANG Ji-shui, GU Wei-jie
doaj  

Stand spatial structure promotes tree growth and sapling diversity in northern tropical karst seasonal rainforest

Frontiers in Plant Science
Stand spatial structure and sapling diversity are essential for maintaining ecosystem stability. However, the dynamic characteristics of stand spatial structure, its driving factors, and its influence on sapling diversity remain unclear.
Lingyan Li, Lingyan Li, Lingyan Li, Ruixia Ma, Ruixia Ma, Bin Wang, Bin Wang, Fuzhao Huang, Fuzhao Huang, Jianxing Li, Jianxing Li, Fang Lu, Fang Lu, Wusheng Xiang, Wusheng Xiang, Dongxing Li, Dongxing Li, Xiankun Li, Xiankun Li, Yili Guo, Yili Guo, Yili Guo   +21 more
doaj   +1 more source

Derivation of correlation dimension from spatial autocorrelation functions.

PLoS ONE
BackgroundSpatial complexity is always associated with spatial autocorrelation. Spatial autocorrelation coefficients including Moran's index proved to be an eigenvalue of the spatial correlation matrixes. An eigenvalue represents a kind of characteristic
Yanguang Chen
doaj   +1 more source

Optimizing Spatial Databases [PDF]

Informatică economică, 2010
This paper describes the best way to improve the optimization of spatial databases: through spatial indexes. The most commune and utilized spatial indexes are R-tree and Quadtree and they are presented, analyzed and compared in this paper. Also there are
Anda VELICANU, Ştefan OLARU
doaj  

Specialization and Geographic Concentration of East Java Manufacturing Industries [PDF]

The concentration of spatial economic activities, especially in manufacturing industries has become an interesting phenomenon to be analyzed. In manufacturing industries, spatial concentration is determined by wages, transportation cost, market access ...
Anindita Pradana, Erlangga Agustino Landiyanto, Sri kusreni   +2 more
core  

GHGs and air pollutants embodied in China's international trade: Temporal and spatial index decomposition analysis. [PDF]

PLoS One, 2017
Liu Z, Mao X, Song P.
europepmc   +1 more source

GTalign: spatial index-driven protein structure alignment, superposition, and search. [PDF]

Nat Commun
Margelevičius M.
europepmc   +1 more source

Spatiotemporal patterns and typological differences in the development-protection nexus of resource-based cities in China. [PDF]

Sci Rep
Ji L, Gao H, Chen L, Dong J.
europepmc   +1 more source

Multidimensional evaluation and strategic framework for integrated development of urban agglomerations in underdeveloped regions. [PDF]

PLoS One
Wang F, Li X.
europepmc   +1 more source

Spatial heterogeneity of plant diversity-productivity-carbon nexus in eastern Loess Plateau grasslands. [PDF]

PLoS One
Pang H, Mi J, Su Y, Shi J, Zhou Z, Shi J, Hu S, Zhao X, Dong K.   +8 more
europepmc   +1 more source