Results 41 to 50 of about 27,224 (66)

Temporal and Spatial Analysis of Negative Emotions in China during the COVID-19 Pandemic

Behavioral Sciences
This research aims to explore the spatiotemporal distribution patterns of negative emotions in mainland China during different stages of the COVID-19 pandemic and the external factors influencing this clustering.
Yating Ding, Lin Wu, Zijian Peng, Bo Liu
doaj   +1 more source

Regression models for prediction of corn yield in the state of Paraná (Brazil) from 2012 to 2014

Acta Scientiarum. Agronomy, 2018
This study aimed to identify areas that showed spatial autocorrelation for corn yield and its predictive variables (i.e., average air temperature, rainfall, solar radiation, soil agricultural potential and altitude) and to determine the most appropriate ...
Rodolfo Seffrin, Everton Coimbra De Araújo, Claudio Leones Bazzi   +2 more
doaj   +1 more source

Differential Spatial Modulation Using New Index Bits [PDF]

Radioengineering
Spatial modulation (SM) has the potential to meet the requirements of 5G and beyond communication systems with features such as reduced hardware complexity and good trade-off between spectral efficiency and energy efficiency.
V. Abbasi, M. G. Shayesteh
doaj  

Evaluation of Spatial Integration Degree Between Hankou Historical and Cultural Blocks and Surrounding Areas in Wuhan Based on Street View Images

Buildings
With China’s urban growthism past its peak, urban development has shifted from incremental expansion to inventory quality improvement. Renovating historical and cultural blocks—a core area for urban quality enhancement—makes exploring their integration ...
Hong Xu, Xiaoyu Jiang, Jun Shao, Ziming Li, Wei Pang, Lixiang Zhou   +5 more
doaj   +1 more source

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

A Classification for a Geostatistical Index of Spatial Dependence

Revista Brasileira de Ciência do Solo
: In geostatistical studies, spatial dependence can generally be described by means of the semivariogram or, in complementary form, with a single index followed by its categorization to classify the degree of such dependence.
Enio Júnior Seidel, Marcelo Silva de Oliveira   +1 more
doaj   +1 more source

Brazil’s vulnerability to COVID-19 quantified by a spatial metric

Public Health in Practice, 2020
Dayana Almeida, Lincoln B.L.G. Pinheiro, Luiz E. Moschini, Jan Bogaert   +3 more
doaj   +1 more source

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Spatial Characteristics of the Tourism Flows in China: A Study Based on the Baidu Index

ISPRS International Journal of Geo-Information, 2021
Yongwei Liu
exaly