Results 31 to 40 of about 25,759 (265)
An Efficient Top-
IEEE Access, 2019 Existing spatial keyword query processing models mainly consider the spatial proximity and text relevancy between spatial objects and spatial keyword query, which usually makes the top-k answer objects are similar to each other.
Xiaoyan Zhang +4 more
doaj +1 more source
Groups Nearest Neighbor Query of Mixed Data in Spatial Database [PDF]
Jisuanji kexue yu tansuo, 2022 The existing group nearest neighbor query methods mainly abstract data objects in space as points or line segments for processing. However, in real applications, simply abstracting spatial objects into points or line segments often affects the accuracy ...
JIANG Yiying, ZHANG Liping, JIN Feihu, HAO Xiaohong
doaj +1 more source
Efficient spatial query processing for big data [PDF]
Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2014 Spatial queries are widely used in many data mining and analytics applications. However, a huge and growing size of spatial data makes it challenging to process the spatial queries efficiently. In this paper we present a lightweight and scalable spatial index for big data stored in distributed storage systems.
Kisung Lee +3 more
openaire +1 more source
Gridvoronoi: An Efficient Spatial Index for Nearest Neighbor Query Processing
IEEE Access, 2019 In this paper, based upon Voronoi Diagram, we propose GridVoronoi which is a novel spatial index that enables users to find the spatial nearest neighbour (NN) from two-dimensional (2D) datasets in almost O(1) time.
Chongsheng Zhang +3 more
doaj +1 more source
GeoFlink: An Efficient and Scalable Spatial Data Stream Management System
IEEE Access, 2022 This era is witnessing an exponential growth in spatial data due to the increase in GPS-enabled devices. Spatial data can be of extreme use to commercial businesses, governments and NGOs if processed timely.
Salman Ahmed Shaikh +4 more
doaj +1 more source
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
SGIR-Tree: Integrating R-Tree Spatial Indexing as Subgraphs in Graph Database Management Systems
ISPRS International Journal of Geo-InformationEfficient spatial query processing in Graph Database Management Systems (GDBMSs) has become increasingly important owing to the prevalence of spatial graph data.
Juyoung Kim +4 more
doaj +1 more source
INDEXING AND QUERY PROCESSING TECHNIQUES IN SPATIO-TEMPORAL DATA [PDF]
ICTACT Journal on Soft Computing, 2016 Indexing and query processing is an emerging research field in spatio - temporal data. Most of the real-time applications such as location based services, fleet management, traffic prediction and radio frequency identification and sensor networks are ...
A John, M Sugumaran, R S Rajesh
doaj
From mice to humans—divergent strategies for intestinal homeostasis and regeneration
FEBS Letters, EarlyView.Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa +2 more
wiley +1 more source
Towards Parallel Spatial Query Processing for Big Spatial Data [PDF]
2012 IEEE 26th International Parallel and Distributed Processing Symposium Workshops & PhD Forum, 2012 In recent years, spatial applications have become more and more important in both scientific research and industry. Spatial query processing is the fundamental functioning component to support spatial applications. However, the state-of-the-art techniques of spatial query processing are facing significant challenges as the data expand and user accesses
Yunqin Zhong +5 more
openaire +2 more sources