Results 21 to 30 of about 12,108,065 (316)
中国科学数据, 2023 The concern about global change has brought more attention to the role of plantations in the regional carbon and water cycle recently. Quercus variabilis is one of the most widely distributed natural tree species in China.
HUANG Hui +5 more
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A Hybrid Spatial Indexing Structure of Massive Point Cloud Based on Octree and 3D R*-Tree
Applied Sciences, 2021 The spatial index structure is one of the most important research topics for organizing and managing massive 3D Point Cloud. As a point in Point Cloud consists of Cartesian coordinates (x,y,z), the common method to explore geometric information and ...
Wei Wang +5 more
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Journal of Logic and Analysis, 2020 We show the theory of pointed $\R$-trees with radius at most $r$ is axiomatizable in a suitable continuous signature. We identify the model companion $\rbRT_r$ of this theory and study its properties. In particular, the model companion is complete and has quantifier elimination; it is stable but not superstable.
Carlisle, Sylvia, Henson, C. Ward
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Association Between Oral Microbiota and Gastrointestinal/Extra-Gastrointestinal Diseases [PDF]
The Korean Journal of Helicobacter and Upper Gastrointestinal ResearchDental clinicians and researchers have recently recommended oral microbial examinations to more accurately diagnose and treat oral diseases, including periodontitis and dental caries.
Do-Young Park +6 more
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International Journal of Digital Earth, 2020 This paper proposes a novel data indexing scheme, the distributed access pattern R-tree (DAPR-tree), for spatial data retrieval in a distributed computing environment.
Jizhe Xia +6 more
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Application of vine copulas to dependence analysis of water quality data [PDF]
Journal of Applied Research in Water and Wastewater, 2022 In this study, using vine copulas and tree sequences, dependence analysis of groundwater quality variables (Total hardness (TH), Sodium adsorption ratio (SAR), Sodium percentage (Na %) and magnesium (Mg)) was performed.
Mohammad Nazeri Tahroudi +3 more
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Textile effluent treatment using Avocado seeds based activated carbon [PDF]
Journal of Applied Research in Water and Wastewater, 2022 In this study, using vine copulas and tree sequences, dependence analysis of groundwater quality variables (Total hardness (TH), Sodium adsorption ratio (SAR), Sodium percentage (Na %) and magnesium (Mg)) was performed.
Jacques Munyegaju +4 more
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PROVIDING R-TREE SUPPORT FOR MONGODB [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 Supporting large amounts of spatial data is a significant characteristic of modern databases. However, unlike some mature relational databases, such as Oracle and PostgreSQL, most of current burgeoning NoSQL databases are not well designed for storing ...
L. Xiang, X. Shao, D. Wang
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Future-Based Persistent Spatial Data Structure for NVM-Based Manycore Machines
IEEE Access, 2022 R-trees have been popular for their support of multidimensional data and high-performing queries. FBR-tree is the state-of-the-art concurrent variant of the R-tree for Intel DC Persistent Memory (DCPM).
Abdul Salam +4 more
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A Continuous k-Nearest Neighbor Query Method for Moving Data in Obstructed Spaces
Journal of Harbin University of Science and Technology, 2018 For the nearest neighbor query problem of continuous moving objects in spatio-temporal databases, the COpKNN (continuous obstructed possible k-nearest neighbor) query is proposed: in a two-dimensional space, given a moving query point q, a set of moving ...
WAN Jing +3 more
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