NDLI: Preferential Attachment in Constraint Networks

Content Provider	IEEE Xplore Digital Library
Author	Devlin, D. O'Sullivan, B.
Copyright Year	2009
Abstract	Many complex real-world systems can be modeled using a graphical structure such as a constraint network. If the properties of such a structure can be exploited, many challenging computational tasks can have good typical-case runtimes even if they are theoretically intractable in general. In this paper we show that many real-world constraint networks induce binary networks that share a common underlying structural characterisation; namely, that their degree distributions exhibit preferential attachment. We report on a novel constraint network generator for random constraint networks that have a scale-free macrostructure. This scale-free generator is based on the well known Barabasi-Albert preferential attachment model. Using this model we demonstrate that real-world constraint networks exhibit degree distributions that are more like those found in scale-free graphs. We also show that the effect of standard degree-based search heuristics on real-world problems exhibiting power-law degree distributions is greater than problems with a uniform random structure. We also show that the backdoor sizes for preferentially attached constraint networks are smaller than those of uniform random problems. This paper provides a novel basis for studying realistic constraint models.
Starting Page	708
Ending Page	715
File Size	865969
Page Count	8
File Format	PDF
ISBN	9781424456192
ISSN	10823409
DOI	10.1109/ICTAI.2009.91
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Runtime Character generation Artificial intelligence Computer networks Computer science Educational institutions Power system modeling Hardware Logistics Job shop scheduling Constraint satisfaction
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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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