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Spatial Aggregation: Theory and Applications [article]

K. Yip, F. Zhao
1996 arXiv   pre-print
To illustrate our theory, we describe the computational structure of three implemented problem solvers -- KAM, MAPS, and HIPAIR --- in terms of the spatial aggregation generic operators by mixing and matching  ...  It computes a multi-layer of intermediate representations, called spatial aggregates, by forming equivalence classes and adjacency relations.  ...  Acknowledgements We thank Chris Bailey-Kellogg for the help in implementing the spatial aggregation language, and the following people for helpful discussions and comments on the earlier drafts of this  ... 
arXiv:cs/9608103v1 fatcat:ourevvlcpbav5n77zafnvjdufm

Spatial Aggregation: Theory and Applications

K. Yip, F. Zhao
1996 The Journal of Artificial Intelligence Research  
To illustrate our theory, we describe the computational structure of three implemented problem solvers -- KAM, MAPS, and HIPAIR --- in terms of the spatial aggregation generic operators by mixing and matching  ...  It computes a multi-layer of intermediate representations, called spatial aggregates, by forming equivalence classes and adjacency relations.  ...  . 24 Spatial Aggregation: Theory and Applications KY is supported by an NSF National Young Investigator Award ECS-935777.  ... 
doi:10.1613/jair.315 fatcat:liiyo34kqfbnravuii7xc6lr5e

Entropy in Spatial Aggregation

Michael Batty
2010 Geographical Analysis  
Statistics and Information Theory. New York: John Wiley, 1959. 5. Luce, R. D. “The Theory of Selective Information and Some of Its Behavioral Applications.” In R. D.  ...  “The Application of Information Theory to the Analysis of Population Distributions in Space.” Economic Geography, Supplement, 46 (1970), 317-31. a .  ... 
doi:10.1111/j.1538-4632.1976.tb00525.x fatcat:rqjkcgr43jdxtawv5llfac4qde

Meaningful spatial prediction and aggregation

Christoph Stasch, Simon Scheider, Edzer Pebesma, Werner Kuhn
2014 Environmental Modelling & Software  
To this end, we present a formal theory about spatio-temporal variable types, observation procedures, as well as interpolation and aggregation procedures relevant in Spatial Statistics.  ...  The appropriateness of spatial prediction methods such as Kriging, or aggregation methods such as summing observation values over an area, is currently judged by domain experts using their knowledge and  ...  Acknowledgements The presented work was developed within the 52 North geostatistics community, and partly funded by the European Project UncertWeb (FP7-248488, see http://www.uncertweb.org/) and the International  ... 
doi:10.1016/j.envsoft.2013.09.006 fatcat:mjttrvkkbrh57jef4el743677u

Message-aggregation enhanced iterative hard-decision decoders

Srdan Brkic, Predrag Ivanis, Bane Vasic, David Declercq
2016 2016 Information Theory and Applications Workshop (ITA)  
We also propose a new hybrid hard-decision decoding algorithm which employs described strategy and the Gallager B decoders as its components.  ...  aggregates the messages from its computation tree and incorporates it into the flipping rule.  ...  However, high complexity of SPA makes it unfit for a number of important applications as flash memories, fiber and free-space optical communications.  ... 
doi:10.1109/ita.2016.7888184 dblp:conf/ita/BrkicIVD16 fatcat:2rtmoau3y5d6jbvrb3dbdlw2xa

Qualitative Spatial Reasoning Extracting and Reasoning with Spatial Aggregates

Christopher Bailey-Kellogg, Feng Zhao
2004 The AI Magazine  
This article focuses on how a particular QSR system, SPATIAL AGGREGATION, can help answer spatial queries for scientific and engineering data sets.  ...  Reasoning about spatial data is a key task in many applications, including geographic information systems, meteorological and fluid-flow analysis, computer-aided design, and protein structure databases  ...  The spatial aggregation research described here was conducted at The Ohio State University and Palo Alto Research Center by the authors and Xingang Huang and Iván Ordóñez.  ... 
doi:10.1609/aimag.v24i4.1730 dblp:journals/aim/Bailey-KelloggZ04 fatcat:arskhyelbjbftnaihkmigrp3ru

Spatial Aggregation Facilitates Discovery of Spatial Topics

Aniruddha Maiti, Slobodan Vucetic
2019 Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics  
are preserved and non-spatial topics are aggregated into a single topic.  ...  Our experiments on 4.7 million tweets collected during the Sandy Hurricane in 2012 show that spatial and temporal aggregation allows rapid discovery of relevant spatial and temporal topics during that  ...  Application of NMF on the 200 aggregated documents identifies some spatially distinct topics covering regions of varying size.  ... 
doi:10.18653/v1/p19-1025 dblp:conf/acl/MaitiV19 fatcat:xsqrukw665d73gjejrjczpmrdm

Cognitive femtocells: Breaking the spatial reuse barrier of cellular systems

Ansuman Adhikary, Vasileios Ntranos, Giuseppe Caire
2011 2011 Information Theory and Applications Workshop  
As possible improvements, we consider an application of the "downlink interference alignment" idea to our system, and the use of multiple antennas at the femtocell access points.  ...  We show that a careful combination of these techniques achieves a remarkably large aggregate femtocell throughput, at very low penalty in terms of the precious and scarce macrocell throughput.  ...  As possible improvements, we consider an application of the "downlink interference alignment" idea to our system, and the use of multiple antennas at the femtocell access points.  ... 
doi:10.1109/ita.2011.5743563 dblp:conf/ita/AdhikaryNC11 fatcat:k2ny6vuhkvgwnp5rttiftsom64

Functional Invariance under Spatial Aggregation from Continuous Spatial Interaction Models

Matthew G. Schwab, Terence R. Smith
2010 Geographical Analysis  
Apart from its intrinsic interest, such a theory of aggregation may have various applications.  ...  We then test the applicability of our theory in terms of its value in predicting spatial interaction at different levels of spatial resolution.  ... 
doi:10.1111/j.1538-4632.1985.tb00842.x fatcat:n3jo5ewt5rg65gn2rtxrwdzqyq

Feng-Shui Theory and Practice Investigated by Spatial Regression Modeling [chapter]

Jung-Sup Um
2012 Application of Geographic Information Systems  
Michael Goodchild of the National Science Foundation-funded National Center for Geographic Information and Analysis (NCGIA) at the University of California, Santa Barbara (UCSB) and Prof.  ...  Acknowledgement Thanks are extended to the different national agencies of South Korea (Spatial Data Warehouse of National Geographic Information Institute, Central Statistical Office, Korean Association  ...  It is believed that the postulates of the classical Feng-Shui theory are applicable to a specific sun light deficient area and not to the general case.  ... 
doi:10.5772/47925 fatcat:scrsy6r775b4xbx44xenemcble

A Facility Location Analysis Considering Spatial Patterns of Distributed Users

Tetsuma FURIHATA, Koji MATSUOKA
1994 Theory and Applications of GIS  
Facility location and area-marketing analysis by Geographical Information System(GIS) frequently require distance from facility to user and aggregated user population in areas of concem.  ...  In this paper we confir m the effectiveness of this latest approach by comparing its result to that produced by the convertional method of data aggregation.  ...  一 般 に 集 計 デ ー タ を 用 い て 算 出 し た 利 用 者 か ら 施 設 ま で の 利 用 距 離 は 、 真 の 利 用 距 離 と は 異 な る こ とが 従 来 よ り指 摘 さ れ て い る(Hillsman and Rhoda , 1978)。  ... 
doi:10.5638/thagis.2.91 fatcat:opqvybg72fcgvgvoda7ecwvpim

Data Aggregation and Distance Encoding for Interactive Large Multidimensional Data Visualization

Desislava Decheva, Lars Linsen
2018 Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications  
We present a novel approach to visually encode aggregated data in projected views and to interactively explore the data.  ...  Properties of clusters are visually encoded in aggregated form using color and size or examined in detail via local scatterplots or local circular parallel coordinate plots.  ...  density, and correctness of an aggregated view.  ... 
doi:10.5220/0006602502250235 dblp:conf/grapp/DechevaL18 fatcat:qu4pue3wf5auzgwgeint54eyde

On the theory of transport phenomena in ferrofluids. Effect of chain-like aggregates

A.Yu. Zubarev
2013 Physica A: Statistical Mechanics and its Applications  
The paper deals with the theoretical study of the effect of chain-like aggregates on diffusion and magnetophoretic transport in ferrofluids.  ...  The goal of this work is the analysis of the effect of the chain-like aggregates on the diffusion and magnetophoretic (i.e. under the action of spatially inhomogeneous magnetic field) transport in ferrofluids  ...  Diffusion and magnetophoretic phenomena in ferrofluids determine many important properties of these systems and their behavior in various technological applications.  ... 
doi:10.1016/j.physa.2012.08.007 fatcat:fgpt35d2prcmnn2jl7e5wmp7ca

The Aggregator Model of Spatial Cognition [article]

Robert Worden
2020 arXiv   pre-print
cycle between the aggregator and the knowledge sources.  ...  I discuss an alternative model of spatial cognition, which uses a single central position aggregator to store estimated locations of each object or feature, and applies constraints on locations in an iterative  ...  diverse applications.  ... 
arXiv:2011.05853v2 fatcat:ckerwerdajhrlosybzy7n4ked4

Research on Spatial Clustering Algorithm based on Data Mining

Runtao Lv, Jin Kao Zhao, Yu Li
2016 International Journal of Database Theory and Application  
We extended the online learning strategy and scalable clustering technique to soft subspace clustering, and propose two online soft subspace clustering methods, OFWSC and OEWSC.  ...  Recently, Hall et al used fuzzy membership function, and proposed two "soft partition" scalable clustering algorithm: (Single-Pass Fuzzy C-Means,SPFCM ) and (Online Fuzzy C-Means,OFCM).  ...  and Application Vol.9, No.12 (2016)  ... 
doi:10.14257/ijdta.2016.9.12.20 fatcat:cvwhj3qg3zeuvjhutjlgmk43rq
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