Search results for "Combinatorial"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
29	Graham R. Brightwell, Douglas B. West	Partially Ordered Sets.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	William I. Gasarch, Arto Salomaa, Thomas H. Cormen, Lane A. Hemaspaandra, Milena Mihail	Theoretical Computer Science.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	James B. Orlin, Ravindra K. Ahuja, David Simchi-Levi, Sunil Chopra, Bruce L. Golden, B. K. Kaku	Networks And Flows.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	Victor J. Katz	Biographies.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	Alfred J. Menezes, Paul C. van Oorschot	Coding Theory And Cryptology.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	Joseph R. Barr, Peter R. Turner, Patrick Jaillet, Vidyadhar G. Kulkarni, Lawrence M. Leemis	Discrete Probability.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	Lisa Carbone, Uri N. Peled, Paul K. Stockmeyer	Trees.	Handbook of Discrete and Combinatorial Mathematics	1999	DBLP DOI BibTeX RDF
29	Paola Festa, Panos M. Pardalos, Mauricio G. C. Resende	Feedback Set Problems.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Wenqi Huang, Yu-Liang Wu, C. K. Wong	A Cogitative Algorithm for Solving the Equal Circles Packing Problem.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Jun Gu, Paul W. Purdom, John V. Franco, Benjamin W. Wah	Algorithms for the Satisfiability (SAT) Problem.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Robert A. Murphey, Panos M. Pardalos, Mauricio G. C. Resende	Frequency Assignment Problems.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Jens Albrecht, Dietmar Cieslik	The Steiner Ratio of L p -planes.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Rainer E. Burkard, Eranda Çela	Linear Assignment Problems and Extensions.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Immanuel M. Bomze, Marco Budinich, Panos M. Pardalos, Marcello Pelillo	The Maximum Clique Problem.	Handbook of Combinatorial Optimization	1999	DBLP DOI BibTeX RDF
29	Afonso Ferreira, Panos M. Pardalos (eds.)	Solving Combinatorial Optimization Problems in Parallel - Methods and Techniques	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Daniel P. Bovet, Andrea Clementi, Pierluigi Crescenzi, Riccardo Silvestri	Parallel approximation of optimization problems.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Marc Gengler	An introduction to parallel dynamic programming.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Graham M. Megson, Lucia Rapanotti, Xian Chen	Automatic synthesis of parallel algorithms.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Panos M. Pardalos, Guoliang Xue, P. D. Panagiotopoulos	Parallel algorithms for global optimization problems.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Arie de Bruin, Gerard A. P. Kindervater, Harry W. J. M. Trienekens	Towards an abstract parallel branch and bound machine.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Mohamed Benaïchouche, Van-Dat Cung, Salah Dowaji, Bertrand Le Cun, Thierry Mautor, Catherine Roucairol	Building a parallel branch and bound library.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Andrea Clementi, José D. P. Rolim, Erik Urland	Randomized parallel algorithms.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Per S. Laursen	Parallel heuristic search - Introductions and a new approach.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	Ricardo C. Corrêa, Afonso Ferreira	Parallel best-first branch-and-bound in discrete optimization: a framework.	Solving Combinatorial Optimization Problems in Parallel	1996	DBLP DOI BibTeX RDF
29	William J. Cook, László Lovász 0001, Paul D. Seymour (eds.)	Combinatorial Optimization, Proceedings of a DIMACS Workshop, New Brunswick, New Jersey, USA, 1992/93	Combinatorial Optimization	1995	DBLP DOI BibTeX RDF
29	Yves Pochet, Laurence A. Wolsey	Algorithms and reformulations for lot sizing problems.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29		Preface.	Combinatorial Optimization	1993	DBLP BibTeX RDF
29	Gábor Simonyi	Graph entropy: A survey.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29	Michael Jünger, Gerhard Reinelt, Stefan Thienel	Practical problem solving with cutting plane algorithms in combinatorialoptimization.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29	Heike Ripphausen-Lipa, Dorothea Wagner, Karsten Weihe	Efficient algorithms for disjoint paths in planar graphs.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29	Svatopluk Poljak, Zsolt Tuza	Maximum cuts and largest bipartite subgraphs.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29	Michel Deza, Viatcheslav P. Grishukhin, Monique Laurent	Hypermetrics in geometry of numbers.	Combinatorial Optimization	1993	DBLP DOI BibTeX RDF
29		Forward.	Combinatorial Optimization	1993	DBLP BibTeX RDF
28	Mohammed Khachan, Patrick Chenin, Hafsa Deddi	Digital n-Pseudomanifold and n-Weakmanifold in a Binary (n+1)-Digital Image.	DGCI	2000	DBLP DOI BibTeX RDF	discrete spaces, combinatorial manifolds, digital topology, combinatorial topology
27	Anshul Kothari, Tuomas Sandholm, Subhash Suri	Solving combinatorial exchanges: optimality via a few partial bids.	EC	2003	DBLP DOI BibTeX RDF	combinatorial exchanges, algorithms, combinatorial auctions
27	Moses Charikar, Venkatesan Guruswami, Ravi Kumar 0001, Sridhar Rajagopalan, Amit Sahai	Combinatorial feature selection problems.	FOCS	2000	DBLP DOI BibTeX RDF	combinatorial feature selection problems, multidimensional objects, subset size maximization, subset size minimization, p-center problem, hardness results, information retrieval, information retrieval, computational complexity, approximation algorithms, feature extraction, optimisation, set theory, VC-dimension, combinatorial mathematics, Vapnik-Chervonenkis dimension
27	Patrick J. Schroeder, Pankaj Bolaki, Vijayram Gopu	Comparing the Fault Detection Effectiveness of N-way and Random Test Suites.	ISESE	2004	DBLP DOI BibTeX RDF	n-way testing, empirical study, fault injection, controlled experiment, Combinatorial testing
27	Koutarou Suzuki, Makoto Yokoo	Secure Generalized Vickrey Auction Using Homomorphic Encryption.	Financial Cryptography	2003	DBLP DOI BibTeX RDF	Generalized Vickrey Auction, game-theory, mechanism design, combinatorial auction, homomorphic encryption
26	Keith M. Martin	On the Applicability of Combinatorial Designs to Key Predistribution for Wireless Sensor Networks.	IWCC	2009	DBLP DOI BibTeX RDF	sensor networks, Key predistribution, combinatorial designs
26	Xin Sui, Ho-fung Leung	An adaptive bidding strategy for combinatorial auctions-based resource allocation in dynamic markets.	AAMAS (2)	2009	DBLP BibTeX RDF	combinatorial auctions, bidding, adaptive strategy
26	Seyit Ahmet Çamtepe, Bülent Yener	Combinatorial design of key distribution mechanisms for wireless sensor networks.	IEEE/ACM Trans. Netw.	2007	DBLP DOI BibTeX RDF	combinatorial design theory, generalized quadrangles (GQ), key pre-distribution (deterministic and hybrid), key-chains, security in wireless sensor networks (WSN), symmetric balanced incomplete block design (BIBD), key management
26	Andrea Giovannucci, Juan A. Rodríguez-Aguilar, Meritxell Vinyals, Jesús Cerquides, Ulle Endriss	Mixed multi-unit combinatorial auctions for supply chain management.	SIGecom Exch.	2007	DBLP DOI BibTeX RDF	supply chain management, combinatorial auctions
26	Makoto Yokoo	False-name bids in combinatorial auctions.	SIGecom Exch.	2007	DBLP DOI BibTeX RDF	mechanism design, combinatorial auction
26	Yi Liang, Jianping Fan 0002, Dan Meng, Ruihua Di	A Strategy-Proof Combinatorial Auction-Based Grid Resource Allocation System.	ICA3PP	2007	DBLP DOI BibTeX RDF	Grid, Resource allocation, Accounting, Combinatorial Auction
26	Meritxell Vinyals, Jesús Cerquides	On the Empirical Evaluation of Mixed Multi-Unit Combinatorial Auctions.	AMEC/TADA	2007	DBLP DOI BibTeX RDF	multiagent systems, Combinatorial auctions, supply chain formation
26	Jeff Hartline, Alexa Sharp	An Incremental Model for Combinatorial Maximization Problems.	WEA	2006	DBLP DOI BibTeX RDF	online problems, analysis of algorithms, network analysis, combinatorial problems, approximation techniques
26	Man-Yin Shi, Shan-Li Hu	Modeling Negotiation in Combinatorial Auctions Based on Multi-agent.	PRIMA	2006	DBLP DOI BibTeX RDF	utility increment, benefit increment, multi-agent, Combinatorial auction
26	Changhai Nie, Baowen Xu, Ziyuan Wang, Liang Shi	Generating Optimal Test Set for Neighbor Factors Combinatorial Testing.	QSIC	2006	DBLP DOI BibTeX RDF	neighbor factors interaction, Software testing, combinatorial testing
26	Joel Ratsaby	On the Combinatorial Representation of Information.	COCOON	2006	DBLP DOI BibTeX RDF	Information theory, VC-dimension, combinatorial complexity
26	Tokuro Matsuo, Takayuki Ito 0001, Robert W. Day, Toramatsu Shintani	A robust combinatorial auction mechanism against shill bidders.	AAMAS	2006	DBLP DOI BibTeX RDF	pareto efficiency, shill bids, combinatorial auctions, incentive compatibility, computational mechanism design, vickrey-clarke-groves mechanism
26	Guillaume Damiand, Samuel Peltier, Laurent Fuchs, Pascal Lienhardt	Topological Map: An Efficient Tool to Compute Incrementally Topological Features on 3D Images.	IWCIA	2006	DBLP DOI BibTeX RDF	model for image representation, intervoxel boundaries, combinatorial map, topological features
26	Takayuki Suyama, Makoto Yokoo	Strategy/False-name Proof Protocols for Combinatorial Multi-Attribute Procurement Auction.	Auton. Agents Multi Agent Syst.	2005	DBLP DOI BibTeX RDF	strategy/false-name proof, mechanism design, combinatorial auction, multi-attribute
26	Jing Tang 0001, Meng-Hiot Lim, Yew-Soon Ong, Meng Joo Er	Solving large scale combinatorial optimization using PMA-SLS.	GECCO	2005	DBLP DOI BibTeX RDF	island model parallel memetic algorithm, selective local search, combinatorial optimization, quadratic assignment problem
26	Abdulnasser Younes, Paul H. Calamai, Otman A. Basir	Generalized benchmark generation for dynamic combinatorial problems.	GECCO Workshops	2005	DBLP DOI BibTeX RDF	benchmarks, dynamic optimization, combinatorial optimization problems
26	Walter J. Gutjahr	Two Metaheuristics for Multiobjective Stochastic Combinatorial Optimization.	SAGA	2005	DBLP DOI BibTeX RDF	multiobjective decision analysis, simulated annealing, combinatorial optimization, Ant colony optimization, stochastic optimization
26	Juan de Vicente, Juan Lanchares, Román Hermida	Annealing placement by thermodynamic combinatorial optimization.	ACM Trans. Design Autom. Electr. Syst.	2004	DBLP DOI BibTeX RDF	Recofigurable, combinatorial optimization, entropy, information theory, programmable logic, thermodynamics
26	Masaya Mito, Satoshi Fujita	On Heuristics for Solving Winner Determination Problem in Combinatorial Auctions.	J. Heuristics	2004	DBLP DOI BibTeX RDF	e-commerce, combinatorial auction, winner determination
26	Yves Ledru, Lydie du Bousquet, Olivier Maury, Pierre Bontron	Filtering TOBIAS Combinatorial Test Suites.	FASE	2004	DBLP DOI BibTeX RDF	VDM, combinatorial testing, JML, model-based specifications
26	Christian Blum 0001, Andrea Roli	Metaheuristics in combinatorial optimization: Overview and conceptual comparison.	ACM Comput. Surv.	2003	DBLP DOI BibTeX RDF	diversification., intensification, combinatorial optimization, Metaheuristics
26	Peter R. Wurman, Gangshu Cai, Jie Zhong, Ashish Sureka	An algorithm for computing the outcome of combinatorial auctions with proxy bidding.	ICEC	2003	DBLP DOI BibTeX RDF	Auction Algorithms, Proxy Bidding, Combinatorial Auctions
26	Ning Chen 0005, Xiaotie Deng, Hong Zhu 0004	Combinatorial auction across independent markets (extended abstract).	EC	2003	DBLP DOI BibTeX RDF	Walrasian equilibrium, incentive compatible mechanism, single-minded auction, combinatorial auction
26	David Coudert, Hervé Rivano, Xavier Roche	A Combinatorial Approximation Algorithm for the Multicommodity Flow Problem.	WAOA	2003	DBLP DOI BibTeX RDF	combinatorial approximation, Multicommodity flow, incremental algorithm, dynamic shortest paths
26	Vincenzo Cutello, Giuseppe Nicosia	An Immunological Approach to Combinatorial Optimization Problems.	IBERAMIA	2002	DBLP DOI BibTeX RDF	Evolutionary Computation, Combinatorial Optimization, NP-complete problems, Immune Algorithms
26	Sajal K. Das 0001, Aisheng Mao	Embeddings in Recursive Combinatorial Networks.	WG	1992	DBLP DOI BibTeX RDF	combinatorial networks, full binary trees, congestion-free routing, Interconnection networks, hypercube, embedding, mesh, bipartite graphs
25	Elena Yavorska Harris, Thierry Lecroq, Gregory Kucherov, Stefano Lonardi	CPM's 20th Anniversary: A Statistical Retrospective.	CPM	2009	DBLP DOI BibTeX RDF
25	Ileana Streinu, Louis Theran	Combinatorial genericity and minimal rigidity.	SCG	2008	DBLP DOI BibTeX RDF	computational geometry, rigidity, sparse graphs
25	Xin Sui, Ho-fung Leung	An Adaptive Bidding Strategy in Multi-round Combinatorial Auctions for Resource Allocation.	ICTAI (2)	2008	DBLP DOI BibTeX RDF
25	Navin Goyal, Yury Lifshits, Hinrich Schütze	Disorder inequality: a combinatorial approach to nearest neighbor search.	WSDM	2008	DBLP DOI BibTeX RDF	disorder constant, disorder dimension, disorder inequality, randomized algorithms, random walk, similarity search, nearest neighbor search, proximity search
25	Tokuro Matsuo, Takayuki Ito 0001, Toramatsu Shintani	An Approach to Detecting Shill-Biddable Allocations in Combinatorial Auctions.	DEECS	2006	DBLP DOI BibTeX RDF
25	Luc Brun, Walter G. Kropatsch	Inside and Outside Within Combinatorial Pyramids.	GbRPR	2005	DBLP DOI BibTeX RDF
25	Luc Brun, Myriam Mokhtari, Fernand Meyer	Hierarchical Watersheds Within the Combinatorial Pyramid Framework.	DGCI	2005	DBLP DOI BibTeX RDF
25	Jin-Woo Song, Sung-Bong Yang	A Faster Optimal Allocation Algorithm in Combinatorial Auctions.	MICAI	2004	DBLP DOI BibTeX RDF
25	W. Kimmerle, E. Kouzoudi	Doubly Transitive Automorphism Groups of Combinatorial Surfaces.	Discret. Comput. Geom.	2003	DBLP DOI BibTeX RDF
25	Artur Czumaj, Christian Sohler	Abstract Combinatorial Programs and Efficient Property Testers.	FOCS	2002	DBLP DOI BibTeX RDF
25	Arindam Biswas 0002, Partha Bhowmick, Moumita Sarkar, Bhargab B. Bhattacharya	Finding the Orthogonal Hull of a Digital Object: A Combinatorial Approach.	IWCIA	2008	DBLP DOI BibTeX RDF
25	Gianni Codato, Matteo Fischetti	Combinatorial Benders' Cuts.	IPCO	2004	DBLP DOI BibTeX RDF
25	Vicky Choi, Navin Goyal	A Combinatorial Shape Matching Algorithm for Rigid Protein Docking.	CPM	2004	DBLP DOI BibTeX RDF
25	Piotr Berman, Bhaskar DasGupta, Eduardo D. Sontag	Randomized Approximation Algorithms for Set Multicover Problems with Applications to Reverse Engineering of Protein and Gene Networks.	APPROX-RANDOM	2004	DBLP DOI BibTeX RDF
25	Rahul Garg 0001, Sanjiv Kapoor, Vijay V. Vazirani	An Auction-Based Market Equilibrium Algorithm for the Separable Gross Substitutability Case.	APPROX-RANDOM	2004	DBLP DOI BibTeX RDF
25	Michel X. Goemans	Using Complex Semidefinite Programming for Approximating MAX E2-LIN3.	RANDOM-APPROX	2001	DBLP DOI BibTeX RDF
25	Petra Mutzel, René Weiskircher	Optimizing over All Combinatorial Embeddings of a Planar Graph.	IPCO	1999	DBLP DOI BibTeX RDF
24	Rajiv Gandhi, Julián Mestre	Combinatorial Algorithms for Data Migration to Minimize Average Completion Time.	APPROX-RANDOM	2006	DBLP DOI BibTeX RDF
23	Éric Colin de Verdière, Francis Lazarus	Optimal pants decompositions and shortest homotopic cycles on an orientable surface.	J. ACM	2007	DBLP DOI BibTeX RDF	combinatorial surface, pants decomposition, Combinatorial optimization, computational topology, homotopy
23	Peter L. Hammer, Alexander Kogan	Essential and redundant rules in Horn knowledge bases.	HICSS (3)	1995	DBLP DOI BibTeX RDF	redundant rules, essential rules, Horn knowledge bases, logically equivalent transformations, irredundant prime knowledge base, future simplifications, combinatorial characterizations, computational recognition procedures, essentiality, knowledge based systems, redundancy, redundancy, production rule, Horn clauses, combinatorial mathematics
23	Raj S. Mitra, Mahmood G. Qadir, Anupam Basu	A consistent labeling approach to hardware software partitioning.	VLSI Design	1995	DBLP DOI BibTeX RDF	consistent labeling problem, implementation sets, real-time systems, heuristics, CAD, CAD, computer aided software engineering, hardware/software codesign, hardware/software partitioning, embedded systems design, combinatorial problem, combinatorial mathematics
23	Joseph F. JáJá, Kwan Woo Ryu	Optimal Algorithms on the Pipelined Hypercube and Related Networks.	IEEE Trans. Parallel Distributed Syst.	1993	DBLP DOI BibTeX RDF	pipelined hypercube, monotone polygon, line packing, parallel algorithms, parallel algorithms, computational geometry, pipeline processing, combinatorial problems, combinatorial mathematics, cube-connected-cycles, shuffle-exchange
23	Giuseppe Confessore, Stefano Giordani, Silvia Rismondo	A market-based multi-agent system model for decentralized multi-project scheduling.	Ann. Oper. Res.	2007	DBLP DOI BibTeX RDF	Multi-project scheduling, Multi-agent system, Heuristic algorithms, Combinatorial auction
23	Manuel Kauers	An algorithm for deciding zero equivalence of nested polynomially recurrent sequences.	ACM Trans. Algorithms	2007	DBLP DOI BibTeX RDF	combinatorial sequences, nested polynomially recurrent sequences, zero equivalence, Symbolic computation
23	Mark Sh. Levin, Mark Last	Design of test inputs and their sequences in multi-function system testing.	Appl. Intell.	2006	DBLP DOI BibTeX RDF	Test input, Test inputs sequences, Multi-function testing, Design, Combinatorial optimization, Decision making, Black-box testing, System approach
23	Dibyendu Chakrabarti, Subhamoy Maitra, Bimal K. Roy	A Hybrid Design of Key Pre-distribution Scheme for Wireless Sensor Networks.	ICISS	2005	DBLP DOI BibTeX RDF	Random Merging, Sensor Network, Key Pre-distribution, Combinatorial Design
23	Jens Keuchel, Christoph Schnörr, Christian Schellewald, Daniel Cremers	Binary Partitioning, Perceptual Grouping, and Restoration with Semidefinite Programming.	IEEE Trans. Pattern Anal. Mach. Intell.	2003	DBLP DOI BibTeX RDF	Image partitioning, figure-ground discrimination, segmentation, combinatorial optimization, convex optimization, graph cuts, relaxation, perceptual grouping, convex programming
23	Matthias Müller-Hannemann	Hexahedral Mesh Generation by Successive Dual Cycle Elimination.	Eng. Comput.	1999	DBLP DOI BibTeX RDF	Combinatorial dual, Cycle elimination, Hexahedral mesh generation, Hex complex, Quadrilateral surface meshing, Planar graphs
22	Serban Iordache	Consultant-guided search: a new metaheuristic for combinatorial optimization problems.	GECCO	2010	DBLP DOI BibTeX RDF	combinatorial optimization, swarm intelligence, traveling salesman problem, metaheuristics
22	Kevin Leyton-Brown, Eugene Nudelman, Yoav Shoham	Empirical hardness models: Methodology and a case study on combinatorial auctions.	J. ACM	2009	DBLP DOI BibTeX RDF	Empirical analysis of algorithms, algorithm portfolios, runtime prediction, combinatorial auctions
22	Moshe Babaioff, Ron Lavi, Elan Pavlov	Single-value combinatorial auctions and algorithmic implementation in undominated strategies.	J. ACM	2009	DBLP DOI BibTeX RDF	undominated strategies, mechanism design, incentives, Combinatorial auctions
22	Bellanov S. Apilli	Fault-based combinatorial testing of web services.	OOPSLA Companion	2009	DBLP DOI BibTeX RDF	fault-based, testing, web, services, combinatorial
22	Christos Koukouvinos, Dimitris E. Simos	Self-dual Codes over Small Prime Fields from Combinatorial Designs.	CAI	2009	DBLP DOI BibTeX RDF	construction, combinatorial designs, Self-dual codes
22	Dan E. Tamir, Natan T. Shaked, Wilhelmus J. Geerts, Shlomi Dolev	Combinatorial Optimization Using Electro-Optical Vector by Matrix Multiplication Architecture.	OSC	2009	DBLP DOI BibTeX RDF	The Traveling Salesman Problem, Genetic Algorithms, Parallel Processing, Combinatorial Optimization, Heuristic Search, Hill Climbing, Optical Computing
22	Ron Bekkerman, Martin Scholz, Krishnamurthy Viswanathan	Improving clustering stability with combinatorial MRFs.	KDD	2009	DBLP DOI BibTeX RDF	clustering stability, combinatorial MRF, comraf
22	John Dunagan, Alice X. Zheng, Daniel R. Simon	Heat-ray: combating identity snowball attacks using machinelearning, combinatorial optimization and attack graphs.	SOSP	2009	DBLP DOI BibTeX RDF	identity snowball, machine learning, support vector machine, authentication, access control, combinatorial optimization, attack graph, sparsest cut