Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Access structures for fuzzy spatial queries
Date
2002-06-29
Author
Sozer, A
Yazıcı, Adnan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
161
views
0
downloads
Cite This
Spatial data are complex and have spatial components and uncertain properties. It is important to develop effective spatial and aspatial indexing techniques to facilitate spatial and/or aspatial querying for databases that deal with spatial data. In this study we discuss a number of spatial index structures, such as Multi-level grid file (MLGF), R-tree, and R*-tree, for fuzzy spatial and/or aspatial queries.
Subject Keywords
Fuzzy spatial querying
,
R-tree
,
Multi-level grid file
,
Spatial database
URI
https://hdl.handle.net/11511/62430
DOI
https://doi.org/10.1109/nafips.2002.1018090
Collections
Department of Computer Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Implementation of X-Tree with 3D Spatial Index and Fuzzy Secondary Index
Keskin, Sinan; Yazıcı, Adnan; Oğuztüzün, Mehmet Halit S. (2011-10-28)
In spatial databases, traditional approach is to build separate indexing structures for spatial and non-spatial attributes. This article introduces a new coupled approach that combines a 3D spatial primary index and a fuzzy non-spatial secondary index. Based on tests with several types of queries on a meteorological data set, it is shown that our coupled structure reduces the number of iterations and the time consumed for querying compared with the traditional uncoupled one.
Performance Comparison of Single and Dual Polarized MIMO Systems
Soker, Burak; Tuncer, Temel Engin (2013-04-26)
Polarization diversity in a 2x2 MIMO communication system is investigated for Alamouti and spatial multiplexing transmission schemes. Parameters such as cross polar discrimination and correlation coefficients introducing the polarization diversity are included in the channel model. Receive antenna correlation coefficients are generated from a realistic random model. The relative performance of the single and dual polarizations depends significantly on the channel characteristics. Single and dual polarizatio...
A Comparison of spatial modulation and spatial multiplexing systems in multipath fading channels
Saygılı, Halil; Yılmaz, Ali Özgür; Department of Electrical and Electronics Engineering (2013)
In this thesis, multiple antenna transmission techniques like spatial multiplexing, spatial modulation and multiple active spatial modulation are compared in multipath fading channels. Maximum likelihood sequence estimation (MLSE) based on the Ungerboeck observation model is the optimal operation for intersymbol interference channels and applied on the mentioned multiple antenna transmission strategies. The performance analysis based on Monte Carlo simulations and comparison of the computational complexity ...
Semi-Bayesian Inference of Time Series Chain Graphical Models in Biological Networks
Farnoudkia, Hajar; Purutçuoğlu Gazi, Vilda (null; 2018-09-20)
The construction of biological networks via time-course datasets can be performed both deterministic models such as ordinary differential equations and stochastic models such as diffusion approximation. Between these two branches, the former has wider application since more data can be available. In this study, we particularly deal with the probabilistic approaches for the steady-state or deterministic description of the biological systems when the systems are observed though time. Hence, we consider time s...
Fixed-frequency slice computation of discrete Cohen's bilinear class of time-frequency representations
Ozgen, MT (2000-02-01)
This communication derives DFT-sample-based discrete formulas directly in the spectral-correlation domain for computing fixed-frequency slices of discrete Cohen's class members with reduced computational cost, both for one-dimensional and multidimensional (specifically two-dimensional (2-D)) finite-extent sequence cases. Frequency domain integral expressions that define discrete representations are discretized to obtain these discrete implementation formulas. 2-D ambiguity function domain kernels are chosen...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
A. Sozer and A. Yazıcı, “Access structures for fuzzy spatial queries,” 2002, p. 383, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62430.