Search results for "directed graph"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
3	Runian Geng, Xiangjun Dong, He Jiang, Wenbo Xu	WTSPMiner: Efficiently Mining Weighted Sequential Patterns from Directed Graph Traversals.	ICIC	2008	DBLP DOI BibTeX RDF	weighted directed graph, traversal pattern mining, weighted sequential pattern mining, data mining
2	Sergio Cabello, Éric Colin de Verdière, Francis Lazarus	Finding shortest non-trivial cycles in directed graphs on surfaces.	Symposium on Computational Geometry	2010	DBLP DOI BibTeX RDF	embedded graph, non-contractible cycle, non-separating cycle, directed graph, surface, computational topology, topological graph theory
2	Yunqing Xia, Boyi Hao	Opinion Target Network: A Two-Layer Directed Graph for Opinion Target Extraction.	TSD	2009	DBLP DOI BibTeX RDF
2	Dongsheng Duan, Yuhua Li, Yanan Jin, Zhengding Lu	Community mining on dynamic weighted directed graphs.	CIKM-CNIKM	2009	DBLP DOI BibTeX RDF	change-point detection, dynamic weighted directed graph, modularity, compactness, community discovery
2	Runian Geng, Xiangjun Dong, Guoling Liu, Wenbo Xu	Efficiently Mining Maximal Frequent Patterns from Traversals on Weighted Directed Graph Using Statistical Theory.	FSKD	2008	DBLP DOI BibTeX RDF
2	Sukhendu Kanrar, Sankhayan Choudhury, Nabendu Chaki	A Link-failure Resilient Token based Mutual Exclusion Algorithm for Directed Graph Topology.	ISPDC	2008	DBLP DOI BibTeX RDF
2	Telikepalli Kavitha, Katakam Vamsi Krishna	An improved heuristic for computing short integral cycle bases.	ACM Journal of Experimental Algorithmics	2008	DBLP DOI BibTeX RDF	integral cycle basis, minimum cycle basis, combinatorial optimization, Directed graph
2	Liam Roditty	A faster and simpler fully dynamic transitive closure.	ACM Transactions on Algorithms	2008	DBLP DOI BibTeX RDF	directed graph, reachability, Dynamic graph algorithms
2	Fan Yang, Deyun Xiao	Sensor location problem for large-scale complex systems in the framework of the dynamic Signed Directed Graph.	SMC	2007	DBLP DOI BibTeX RDF
2	Martin Harrigan, Patrick Healy	Efficiently drawing a significant spanning tree of a directed graph.	APVIS	2007	DBLP DOI BibTeX RDF
2	Lothrop Mittenthal	Sequencings and Directed Graphs with Applications to Cryptography.	SSC	2007	DBLP DOI BibTeX RDF	Block encryption, Complete Latin square, Directed terrace, Inter-round mixing, Quick trickle permutation, Sequenceable group, S/P network, Directed graph, Sequencing
2	Moses Charikar, Konstantin Makarychev, Yury Makarychev	Directed metrics and directed graph partitioning problems.	SODA	2006	DBLP DOI BibTeX RDF
2	Uday Bondhugula, Ananth Devulapalli, Joseph Fernando, Pete Wyckoff, P. Sadayappan	Parallel FPGA-based all-pairs shortest-paths in a directed graph.	IPDPS	2006	DBLP DOI BibTeX RDF
2	Minsik Cho, Hongjoong Shin, David Z. Pan	Fast substrate noise-aware floorplanning with preference directed graph for mixed-signal SOCs.	ASP-DAC	2006	DBLP DOI BibTeX RDF
2	Egon Balas, Rüdiger Stephan	On the Cycle Polytope of a Directed Graph and Its Relaxations.	OR	2006	DBLP DOI BibTeX RDF
2	Song Wu, Hai Jin, Kang He, Zongwei Luo	A Data Transfer Scheme of Grid Workflow Based on Weighted Directed Graph.	GCC Workshops	2006	DBLP DOI BibTeX RDF
2	Ding-Zhu Du, My T. Thai, Yingshu Li, Dan Liu, Shiwei Zhu	Strongly Connected Dominating Sets in Wireless Sensor Networks with Unidirectional Links.	APWeb	2006	DBLP DOI BibTeX RDF	Strongly Connected Dominating Set, Disk Graph, Wireless Sensor Network, Directed Graph, Virtual Backbone
2	Telikepalli Kavitha	An Õ(m2n) Randomized Algorithm to Compute a Minimum Cycle Basis of a Directed Graph.	ICALP	2005	DBLP DOI BibTeX RDF
2	Bingshu Wang, Wenliang Cao, Liangyu Ma, Ji Zhang	Fault Diagnosis Approach Based on Qualitative Model of Signed Directed Graph and Reasoning Rules.	FSKD	2005	DBLP DOI BibTeX RDF
2	Dengyong Zhou, Jiayuan Huang, Bernhard Schölkopf	Learning from labeled and unlabeled data on a directed graph.	ICML	2005	DBLP DOI BibTeX RDF
2	Chai Wah Wu	Synchronization in an array of chaotic systems coupled via a directed graph.	ISCAS	2005	DBLP DOI BibTeX RDF
2	Yaodong Chen, Ting Wang, Huowang Chen	Using Directed Graph Based BDMM Algorithm for Chinese Word Segmentation.	CICLing	2005	DBLP DOI BibTeX RDF
2	Igor B. Bourdonov	Backtracking Problem in the Traversal of an Unknown Directed Graph by a Finite Robot.	Programming and Computer Software	2004	DBLP DOI BibTeX RDF
2	Igor B. Bourdonov	Traversal of an Unknown Directed Graph by a Finite Robot.	Programming and Computer Software	2004	DBLP DOI BibTeX RDF
2	Hyeun-Jeong Min, Sung-Bae Cho	Creative 3D Designs Using Interactive Genetic Algorithm with Structured Directed Graph.	PRICAI	2004	DBLP DOI BibTeX RDF
2	Parikshit Gopalan, Richard J. Lipton, Aranyak Mehta	Randomized Time-Space Tradeoffs for Directed Graph Connectivity.	FSTTCS	2003	DBLP DOI BibTeX RDF
2	Pierre Laroche	Building efficient partial plans using Markov decision processes.	ICTAI	2000	DBLP DOI BibTeX RDF	efficient partial plan building, optimal action sequences, actuator uncertainties, goal state, uncertainty, planning, mobile robots, mobile robot, Markov processes, directed graphs, directed graph, path planning, Markov decision processes, decision theory, state space, uncertainty handling
2	Juan Castellanos, Gheorghe Paun, Alfonso Rodríguez-Patón	Computing with Membranes: P Systems with Worm-Objects. (PDF / PS)	SPIRE	2000	DBLP DOI BibTeX RDF	worm-objects, string multisets, output membrane, recursively enumerable sets, quadratic time, membrane division, computational complexity, directed graph, NP-complete problem, symbols, P systems, linear time, SAT problem, Hamiltonian Path Problem, polynomial solution
2	Zinovy Diskin	On Mathematical Foundations for Business Modeling (Presented at TOOLS-USA 2000).	TOOLS	2000	DBLP DOI BibTeX RDF	business domains, toposes, generalized sketch, predefined signature, visualization superstructures, business specifications, logical derivation, algebraic term rewriting, systems analysis, directed graphs, directed graph, business modeling, diagrams, diagrams, labels, predicate, corporate modelling, mathematical foundations
2	Fabrice Moscheni, Sushil K. Bhattacharjee, Murat Kunt	Spatiotemporal Segmentation Based on Region Merging.	IEEE Trans. Pattern Anal. Mach. Intell.	1998	DBLP DOI BibTeX RDF	Automatic spatiotemporal segmentation, modified Kolmogorov-Smirnov test, weighted directed graph, object segmentation, region merging
2	Zdenek Kotásek, F. Zboril	RT level testability analysis to reduce test application time.	EUROMICRO	1997	DBLP DOI BibTeX RDF	register transfer level testability analysis, RTL element classification, RTL circuit transformation, labelled directed graph, PROLOG environment, implementation principles, logic testing, test application time reduction
2	Frédéric Pétrot, Denis Hommais, Alain Greiner	Cycle precise core based hardware/software system simulation with predictable event propagation.	EUROMICRO	1997	DBLP DOI BibTeX RDF	hardware software system simulation, predictable event propagation, cycle precise core based system simulator, digital embedded systems, Mealy signals, combinational signals, MIPS R3000, microprocessor core, PI-Bus, Pentium 120, communication, graph, C, high level synthesis, memories, directed graph, FSM, topological sort, compile-time, communicating finite state machines
2	Joseph Naor, Baruch Schieber	Improved Approximations for Shallow-Light Spanning Trees.	FOCS	1997	DBLP DOI BibTeX RDF	shallow-light spanning trees, bicriteria optimization, non-trivial approximation factors, information retrieval, directed graphs, directed graph, directed graphs, polynomial time algorithm, VLSI design
2	Nasir D. Memon, Nader Moayeri	A new error criterion for near-lossless image compression. (PDF / PS)	ICIP	1997	DBLP DOI BibTeX RDF	near-lossless image compression, error criterion, maximum pixel error criterion, image brightness preservation, image colour preservation, trellis-searched scheme, predictive context-based scheme, planar directed graph, data compression, image coding, simulation results, image filtering, subjective quality
2	Takeaki Uno	An Algorithm for Enumerating all Directed Spanning Trees in a Directed Graph.	ISAAC	1996	DBLP DOI BibTeX RDF	directed spanning tree, listing, enumerating algorithm
2	James Jianghai Fu	Linear matching-time algorithm for the directed graph isomorphism problem.	ISAAC	1995	DBLP DOI BibTeX RDF
2	Dimitrios Kagaris, Spyros Tragoudas, Grammati E. Pantziou, Christos D. Zaroliagis	Quickest paths: parallelization and dynamization .	HICSS	1995	DBLP DOI BibTeX RDF	dynamic quickest path problem, transmission time, minimum transmission time, fast data transmissions, edge lead times, edge capacities, data structure updating, edge deletion, single pair quickest path problem, parallel algorithms, parallel algorithms, computational complexity, parallelization, data structures, dynamization, directed graphs, directed graph, travelling salesman problems, communication networks, operations research, telecommunication networks, sparse network, dynamic change
2	François Baccelli, Serguei Foss	Ergodicity of Jackson-type queueing networks.	Queueing Syst.	1994	DBLP DOI BibTeX RDF	Ordered directed graph, Euler graphs, Euler ordered directed graph, switching sequence, open Jackson-type queueing network, Euler network, conservation rule, departure and throughput processes, first and second-order ergodic properties, subadditive ergodic theorem, solidarity property, stochastic recursive sequences, stationary solution, coupling-convergence, uniqueness of the stationary regime, composition, decomposition, point processes
2	Nihal Yazici-Pekergin, Jean-Marc Vincent	Stochastic Bounds on Execution Times of Parallel Programs.	IEEE Trans. Software Eng.	1991	DBLP DOI BibTeX RDF	stochastic bound methods, interdependent tasks, acyclic directed graph, NBUE, exponential random variables, performance evaluation, parallel programs, parallel programming, performance measure, directed graphs, stochastic processes, execution times, task graph, synchronization constraints
2	Alberto Marchetti-Spaccamela	On the Estimate of a Directed Graph.	WG	1988	DBLP DOI BibTeX RDF
2	Shinji Umeyama	An Eigendecomposition Approach to Weighted Graph Matching Problems.	IEEE Trans. Pattern Anal. Mach. Intell.	1988	DBLP DOI BibTeX RDF	weighted graph matching, undirected-graph-matching, Hermitian matrices, directed-graph-matching, pattern recognition, pattern recognition, graph theory, eigenvalues and eigenfunctions, eigendecomposition, adjacency matrices
2	Jonathan Billington, Geoffrey R. Wheeler, Michael C. Wilbur-Ham	PROTEAN: A High-Level Petri Net Tool for the Specification and Verification of Communication Protocols.	IEEE Trans. Software Eng.	1988	DBLP DOI BibTeX RDF	PROTEAN, high-level Petri net tool, numerical Petri nets, textual interfaces, exhaustive reachability analysis, directed graph analysis, engineering workstation, verification, protocols, specification, software tools, finite state machines, specification languages, directed graphs, communication protocols, finite automata, graphical interfaces, interactive simulation
2	Aaron J. Gordon, Raphael A. Finkel	Handling Timing Errors in Distributed Programs.	IEEE Trans. Software Eng.	1988	DBLP DOI BibTeX RDF	postmortem debugger, history-keeping mechanism, distributed processing, software tools, program testing, directed graph, directed graphs, distributed programs, interprocess communication, TAP, timing errors, timing graph
2	Dan C. Clarke	An augmented directed graph base for application development.	ACM Southeast Regional Conference	1982	DBLP DOI BibTeX RDF
1	Jie Mei, Wei Ren, Guangfu Ma	Distributed containment control for Lagrangian networks with parametric uncertainties under a directed graph.	Automatica	2012	DBLP DOI BibTeX RDF
1	Fan Yang, Sirish L. Shah, Deyun Xiao	Signed directed graph based modeling and its validation from process knowledge and process data.	Applied Mathematics and Computer Science	2012	DBLP DOI BibTeX RDF
1	Hongjun Jia, Guorong Wu, Qian Wang, Yaping Wang, Minjeong Kim, Dinggang Shen	Directed graph based image registration.	Comp. Med. Imag. and Graph.	2012	DBLP DOI BibTeX RDF
1	Stephen G. Kobourov	Spring Embedders and Force Directed Graph Drawing Algorithms	CoRR	2012	DBLP BibTeX RDF
1	Páidí Creed, Mary Cryan	The number of Euler tours of a random directed graph	CoRR	2012	DBLP BibTeX RDF
1	Chun-Cheng Lin, Hsu-Chun Yen	A new force-directed graph drawing method based on edge-edge repulsion.	J. Vis. Lang. Comput.	2012	DBLP DOI BibTeX RDF
1	Ajit A. Diwan, Josh B. Frye, Michael Plantholt, Shailesh K. Tipnis	A sufficient condition for the existence of an anti-directed 2-factor in a directed graph.	Discrete Mathematics	2011	DBLP DOI BibTeX RDF
1	Alessandro Crippa, Leonardo Cerliani, Luca Nanetti, Jos B. T. M. Roerdink	Heuristics for connectivity-based brain parcellation of SMA/pre-SMA through force-directed graph layout.	NeuroImage	2011	DBLP DOI BibTeX RDF
1	Zhixin Sun, Yuhua Xu, Jing Gong, Zhiguang Ren	A multicast routing algorithm based on searching in directed graph.	Applied Mathematics and Computation	2011	DBLP DOI BibTeX RDF
1	Lars Eirik Danielsen, Matthew G. Parker	Directed graph representation of half-rate additive codes over GF(4).	Des. Codes Cryptography	2011	DBLP DOI BibTeX RDF
1	Loukas Georgiadis	Approximating the Smallest 2-Vertex Connected Spanning Subgraph of a Directed Graph.	ESA	2011	DBLP DOI BibTeX RDF
1	Giorgio Gosti, William H. Batchelder	Naming on a Directed Graph.	SBP	2011	DBLP DOI BibTeX RDF
1	Chen Wang, Kai-Kuang Ma	Common visual pattern discovery via directed graph model.	ICIP	2011	DBLP DOI BibTeX RDF
1	Hongjun Jia, Guorong Wu, Qian Wang, Yaping Wang, Minjeong Kim, Dinggang Shen	Directed Graph Based Image Registration.	MLMI	2011	DBLP DOI BibTeX RDF
1	Michael Burch, Corinna Vehlow, Natalia Konevtsova, Daniel Weiskopf	Evaluating Partially Drawn Links for Directed Graph Edges.	Graph Drawing	2011	DBLP DOI BibTeX RDF
1	Dominique C. Perrault-Joncas, Marina Meila	Directed Graph Embedding: an Algorithm based on Continuous Limits of Laplacian-type Operators.	NIPS	2011	DBLP BibTeX RDF
1	Na Deng, Desheng Li, Changbao Li, Junliang Chen, Chuanchang Liu	On-the-Fly Detection Approach of Control Dependency Deadlocks in BPEL.	ICWS	2011	DBLP DOI BibTeX RDF	simple circuit, web services, directed graph, business process modeling, BPEL, deadlocks, control dependency
1	Wihem Arsac, Luca Compagna, Samuel Paul Kaluvuri, Serena Elisa Ponta	Security validation tool for business processes.	SACMAT	2011	DBLP DOI BibTeX RDF
1	Amin Mantrach, Luh Yen, Jérôme Callut, Kevin Françoisse, Masashi Shimbo, Marco Saerens	The Sum-over-Paths Covariance Kernel: A Novel Covariance Measure between Nodes of a Directed Graph.	IEEE Trans. Pattern Anal. Mach. Intell.	2010	DBLP DOI BibTeX RDF	kernel on a graph, correlation measure, betweenness measure, resistance distance, commute time distance, biased random walk, semi-supervised classification, shortest path, Graph mining
1	Sanjukta Bhowmick, Suzanne M. Shontz	Towards high-quality, untangled meshes via a force-directed graph embedding approach.	Procedia CS	2010	DBLP DOI BibTeX RDF
1	Hongchang Ke, Hui Wang, Hongwei Zhao, Kaiyu Liang	Visual Mental Imagery Memory Model Based on Weighted Directed Graph.	JCP	2010	DBLP DOI BibTeX RDF
1	Andri Mirzal, Masashi Furukawa	Eigenvectors for clustering: Unipartite, bipartite, and directed graph cases	CoRR	2010	DBLP BibTeX RDF
1	Jin-yi Cai, Xi Chen	A Decidable Dichotomy Theorem on Directed Graph Homomorphisms with Non-negative Weights	CoRR	2010	DBLP BibTeX RDF
1	Rani Hod, Marcin Krzywkowski	The hat problem on a directed graph	CoRR	2010	DBLP BibTeX RDF
1	Hua Wang, Chris H. Q. Ding, Heng Huang	Directed Graph Learning via High-Order Co-linkage Analysis.	ECML/PKDD	2010	DBLP DOI BibTeX RDF
1	Weidong Huang, Peter Eades, Seok-Hee Hong, Chun-Cheng Lin	Improving Force-Directed Graph Drawings by Making Compromises Between Aesthetics.	VL/HCC	2010	DBLP DOI BibTeX RDF
1	Debnath Bhattacharyya, Arup Kumar Bhaumik, Minkyu Choi, Tai-Hoon Kim	Directed Graph Pattern Synthesis in LSB Technique on Video Steganography.	AST/UCMA/ISA/ACN	2010	DBLP DOI BibTeX RDF
1	Jian-Long Kuo, Kun Shian Su, Jing-Hsiung Yang, Wen-Pao Chen	An Intelligent Interface with Composite Dominant Directed Graph Based Petri Nets Controller for Rotatable Solar Panel in Integrated PHEV System.	IEA/AIE	2010	DBLP DOI BibTeX RDF
1	Mohammad Beydoun, Ramzi A. Haraty	Directed Graph Representation and Traversal in Relational Databases.	NDT	2010	DBLP DOI BibTeX RDF
1	Mo Chen, Ming Liu, Jianzhuang Liu, Xiaoou Tang	Isoperimetric cut on a directed graph.	CVPR	2010	DBLP DOI BibTeX RDF
1	Jin-yi Cai, Xi Chen	A Decidable Dichotomy Theorem on Directed Graph Homomorphisms with Non-negative Weights.	FOCS	2010	DBLP DOI BibTeX RDF
1	Fevzi Belli, Mutlu Beyazit	A Formal Framework for Mutation Testing.	SSIRI	2010	DBLP DOI BibTeX RDF	(model-based) mutation testing, formal/regular grammar, manipulation operator, test generation, directed graph, test coverage
1	Anand Ranganathan	Experiences with codifying event processing function patterns.	DEBS	2010	DBLP DOI BibTeX RDF	flow composition, function patterns, case-study, event processing, cascade
1	Julian Francis Miller, Simon L. Harding	Cartesian genetic programming.	GECCO (Companion)	2010	DBLP DOI BibTeX RDF	genetic programming
1	Kaoru Shimada, Kotaro Hirasawa	A method of association rule analysis for incomplete database using genetic network programming.	GECCO	2010	DBLP DOI BibTeX RDF	association rules, missing data, genetic network programming
1	Ni Lao, William W. Cohen	Fast query execution for retrieval models based on path-constrained random walks.	KDD	2010	DBLP DOI BibTeX RDF	filtering and recommending, path-constrained random walks, relational retrieval, learning to rank
1	Tianyi Wang, Yang Chen, Zengbin Zhang, Peng Sun, Beixing Deng, Xing Li	Unbiased sampling in directed social graph.	SIGCOMM	2010	DBLP DOI BibTeX RDF	graph sampling, unbias, online social network
1	David F. Gleich, Paul G. Constantine, Abraham D. Flaxman, Asela Gunawardana	Tracking the random surfer: empirically measured teleportation parameters in PageRank.	WWW	2010	DBLP DOI BibTeX RDF	click trail analysis, empirical click probability, teleportation parameter, toolbar data, Wikipedia, PageRank
1	Christopher R. H. Hanusa	Applying a combinatorial determinant to count weighted cycle systems in a directed graph.	Discrete Mathematics	2009	DBLP DOI BibTeX RDF
1	Stephan Dominique Andres	Asymmetric directed graph coloring games.	Discrete Mathematics	2009	DBLP DOI BibTeX RDF
1	Egon Balas, Rüdiger Stephan	On the cycle polytope of a directed graph and its relaxations.	Networks	2009	DBLP DOI BibTeX RDF
1	Ravi Montenegro	The simple random walk and max-degree walk on a directed graph.	Random Struct. Algorithms	2009	DBLP DOI BibTeX RDF
1	Lars Eirik Danielsen, Matthew G. Parker	Directed Graph Representation of Half-Rate Additive Codes over GF(4)	CoRR	2009	DBLP BibTeX RDF
1	M. Drew Lamar	On uniform sampling simple directed graph realizations of degree sequences	CoRR	2009	DBLP BibTeX RDF
1	Hongyun Ning, Zhiying Zhang, Degan Zhang	Rule-Chain Incremental Mining Algorithm Based on Directed Graph.	FSKD	2009	DBLP DOI BibTeX RDF
1	Han Cai, Do Young Eun	Aging rules: what does the past tell about the future in mobile ad-hoc networks?	MobiHoc	2009	DBLP DOI BibTeX RDF	aging property, inter-contact time, random walk on directed graph, mobile ad-hoc network, failure rate
1	Yusuke Yasui, Sara McMains	Testing an axis of rotation for 3D workpiece draining.	Symposium on Solid and Physical Modeling	2009	DBLP DOI BibTeX RDF	cleanability, draining, rotation axis, water traps, directed graph, manufacturing
1	Weiping Li, Yushun Fan	A Time Management Method in Workflow Management System.	GPC Workshops	2009	DBLP DOI BibTeX RDF	Directed Graph and Critical Path, Time Constraint, Workflow Model
1	Li-Xia Song	On Nilpotent Matrices over Bounded Distributive Lattice.	IITSI	2009	DBLP DOI BibTeX RDF	Bounded distributive lattice, Nilpotent matrices, Prime filter, Directed graph
1	Yexin Zheng, Chao Huang	A novel Toffoli network synthesis algorithm for reversible logic.	ASP-DAC	2009	DBLP DOI BibTeX RDF
1	Kannan Srinathan, Arpita Patra, Ashish Choudhary, C. Pandu Rangan	Unconditionally secure message transmission in arbitrary directed synchronous networks tolerating generalized mixed adversary.	ASIACCS	2009	DBLP DOI BibTeX RDF	mixed adversary, information theoretic security, error probability
1	Sujay Parekh, Kirsten Hildrum, Deepak Rajan, Joel L. Wolf, Kun-Lung Wu	Characterizing, constructing and managing resource usage profiles of system S applications: challenges and experience.	CIKM	2009	DBLP DOI BibTeX RDF	streaming, resource model, performance characterization
1	Julian Francis Miller, Simon L. Harding	Cartesian genetic programming.	GECCO (Companion)	2009	DBLP DOI BibTeX RDF	genetic programming, evolutionary computation
1	Yang Sun, Joseph R. Cavallaro	High throughput VLSI architecture for soft-output mimo detection based on a greedy graph algorithm.	ACM Great Lakes Symposium on VLSI	2009	DBLP DOI BibTeX RDF	mimo detection, VLSI architecture, ASIC design
1	Jonathan Mohr	Two novel prolog assignments.	ITiCSE	2009	DBLP DOI BibTeX RDF	prolog, programming languages, assignments
1	Delia Rusu, Blaz Fortuna, Dunja Mladenic, Marko Grobelnik, Ruben Sipos	Visual analysis of documents with semantic graphs.	KDD Workshop on Visual Analytics and Knowledge Discovery	2009	DBLP DOI BibTeX RDF	triplet, natural language processing, text mining, summarization, document visualization, semantic graph