NDLI: Processing Mutual Nearest Neighbor Queries for Moving Object Trajectories

Content Provider	IEEE Xplore Digital Library
Author	Yunjun Gao Gencai Chen Qing Li Baihua Zheng Chun Li
Copyright Year	2008
Description	Author affiliation: Coll. of Comput. Sci., Zhejiang Univ., Hangzhou (Yunjun Gao; Gencai Chen)
Abstract	Given a set of trajectories D, a query object (point or trajectory) q, and a query interval T, a mutual (i.e., symmetric) nearest neighbor (MNN) query over trajectories finds from D within T, the set of trajectories that are among the $k_{1}$ nearest neighbors (NNs) of q, and meanwhile, have q as one of their $k_{2}$ NNs. This type of queries considers proximity of q to the trajectories and the proximity of the trajectories to q, which is useful in many applications (e.g., decision making, data mining, pattern recognition, etc.). In this paper, we first formalize MNN query and identify some problem characteristics, and then develop two algorithms to process MNN queries efficiently. In particular, we thoroughly investigate two classes of queries, viz. $MNN_{P}$ and $MNN_{T}$ queries, which are defined w.r.t. stationary query points and moving query trajectories, respectively. Our techniques utilize the advantages of batch processing and reusing technology to reduce the I/O (i.e., number of node/page accesses) and CPU costs significantly. Extensive experiments demonstrate the efficiency and scalability of our proposed algorithms using both real and synthetic datasets.
Starting Page	116
Ending Page	123
File Size	463202
Page Count	8
File Format	PDF
ISBN	9780769531540
DOI	10.1109/MDM.2008.17
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-27
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nearest neighbor searches Multi-layer neural network Neural networks Mobile computing Conference management Pattern recognition Computer science Decision making Data mining Costs
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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