Filters








32,595 Hits in 5.3 sec

NL-Graphs: A Hybrid Approach toward Interactively Querying Semantic Data [chapter]

Khadija Elbedweihy, Suvodeep Mazumdar, Stuart N. Wrigley, Fabio Ciravegna
2014 Lecture Notes in Computer Science  
A variety of query approaches have been proposed by the semantic web community to explore and query semantic data.  ...  Motivated by a usability and interactivity perspective, we propose to combine two query approaches (graph-based and natural language) as a hybrid query approach.  ...  Conclusions In this paper, we have presented a hybrid query approach intended to improve users' experience and satisfaction with the search process.  ... 
doi:10.1007/978-3-319-07443-6_38 fatcat:lbrigtoofjccbo5jxayhxsfxdi

HyKSS: Hybrid Keyword and Semantic Search

Andrew J. Zitzelberger, David W. Embley, Stephen W. Liddle, Del T. Scott
2014 Journal on Data Semantics  
Semantic search is the process of interpreting a user's query with respect to underlying semantics and using those semantics to provide relevant 1  ...  We show that our hybrid search system, which uses a query driven dynamic ranking mechanism, outperforms keyword and semantic search in isolation, as well as a number of other non-HyKSS hybrid ranking approaches  ...  Keyword Query Processing The pre-processing of keyword queries begins with the removal of comparison constraints.  ... 
doi:10.1007/s13740-014-0046-4 fatcat:mxcnl5dv4jeulnw62e3jafceuq

Hybrid Ant Algorithm Based Query Processing with Multiagents in Sensor Networks

Jianping Yu, Lianming Zhang, Ming Chen, Xingting Liu
2013 International Journal of Distributed Sensor Networks  
clustering and routing emerging in a hybrid self-organized way from the positive interaction of ants.  ...  However, the constraints of the energy and delay have had a great impact on the operation of wireless sensor networks.  ...  In this paper, we propose a distributed hybrid ant algorithm based query processing algorithm with multiple agents (HAAQP), which intends to overcome the inefficiency of those previous querying algorithms  ... 
doi:10.1155/2013/464703 fatcat:kapzg2qr35gstkr76ebw2jstti

Delay-constrained caching in cognitive radio networks

Jing Zhao, Wei Gao, Yi Wang, Guohong Cao
2014 IEEE INFOCOM 2014 - IEEE Conference on Computer Communications  
Then, we combine them and propose a distributed hybrid approach to minimize the caching cost subject to the delay constraint.  ...  To solve this problem, we propose a costbased approach to minimize the caching cost, and design a delay-based approach to satisfy the delay constraint.  ...  Distribution of the Shortest Path Length from a Data Requester to a Data Source Suppose a query is broadcast from the requester at time 0.  ... 
doi:10.1109/infocom.2014.6848151 dblp:conf/infocom/ZhaoGWC14 fatcat:7sgveugmffhf7n7qrgt3oabh4u

Delay-Constrained Caching in Cognitive Radio Networks

Jing Zhao, Wei Gao, Yi Wang, Guohong Cao
2016 IEEE Transactions on Mobile Computing  
Then, we combine them and propose a distributed hybrid approach to minimize the caching cost subject to the delay constraint.  ...  To solve this problem, we propose a costbased approach to minimize the caching cost, and design a delay-based approach to satisfy the delay constraint.  ...  Distribution of the Shortest Path Length from a Data Requester to a Data Source Suppose a query is broadcast from the requester at time 0.  ... 
doi:10.1109/tmc.2015.2426715 fatcat:ehnek2rtovhuljfkxmd74azm34

Optimizing path query performance: graph clustering strategies

Yun-Wu Huang, Ning Jing, Elke A. Rundensteiner
2000 Transportation Research Part C: Emerging Technologies  
Clustering optimization is attractive because it does not incur any run-time cost, requires no auxiliary data structures, and is complimentary to many of the existing solutions on path query processing  ...  We nd that our SPC performs the best for the highly interconnected city map; the hybrid approach for random graphs with high locality; and the two-way partitioning based on link weights for random graphs  ...  To answer all path queries with a large set of di erent e m bedded constraints, we m a y need to compute numerous transitive closures, each based on a unique embedded constraint.  ... 
doi:10.1016/s0968-090x(00)00049-8 fatcat:lh22hu54qbeypjij2u2gg6qqxa

A Hybrid Event-Processing Architecture based on the Model-driven Approach for High Performance Monitoring

Yosuke Ozawa, Teruo Koyanagi, Mari Abe, Liangzhao Zeng
2007 2007 IEEE Congress on Services (Services 2007)  
Here, we introduce a new architecture, HM-Hybrid, to process events for monitoring efficiently. It is a hybrid of a result cache and a batch update.  ...  The monitoring system needs to capture and to process numerous events while correlating them with other events stored in a database.  ...  Here we introduce HM-Hybrid, a new architecture to process events for monitoring systems. It is a hybrid of a kind of result cache with batch updates to a database.  ... 
doi:10.1109/services.2007.6 dblp:conf/IEEEscc/OzawaKAZ07 fatcat:dg4nxfzye5f2va6wpyaaggyczi

HAWK – Hybrid Question Answering Using Linked Data [chapter]

Ricardo Usbeck, Axel-Cyrille Ngonga Ngomo, Lorenz Bühmann, Christina Unger
2015 Lecture Notes in Computer Science  
We present HAWK, a novel entity search approach for Hybrid Question Answering based on combining Linked Data and textual data.  ...  We present a thorough evaluation of the framework, including an analysis of the influence of entity annotation tools on the generation process of the hybrid queries and a study of the overall accuracy  ...  Combining natural language processing capabilities with Linked Data leads to good benchmark results on the QALD-3 benchmark (see below).  ... 
doi:10.1007/978-3-319-18818-8_22 fatcat:sczyjljcsfga3cf6vvrw2fcb54

Multimedia Search and Temporal Reasoning [article]

Marcio Ferreira Moreno, Rodrigo Costa Mesquita Santos, Wallas Henrique Sousa dos Santos, Sandro Rama Fiorini, Reinaldo Mozart da Gama Silva
2019 arXiv   pre-print
In this work, we revisit a previous extension to the hyperknowledge framework to deal with temporal facts and propose a temporal query language and engine.  ...  Most modern knowledge bases are unable to represent relationships that are valid only during a given time interval.  ...  In our current proposal, there are three types of constraints: • Link Constraint: A link constraint is evaluated to true, if a link exists with the given predicate and for each declared role there are  ... 
arXiv:1911.08225v1 fatcat:bvubqx64crehxhh4t2cu2aj7vq

A hybrid approach to video retrieval in a generic video management and application processing framework

S.S.M. Chan, Qing Li, Yi Wu, Yueting Zhuang
2001 IEEE International Conference on Multimedia and Expo, 2001. ICME 2001.  
In this paper, we present a hybrid approach by integrating a query-based (database) mechanism with content-based retrieval (CBR) functions.  ...  A comprehensive video retrieval system should be able to accommodate and utilize such various (complementary) description data in facilitating effective retrieval.  ...  As such, in this paper we present a hybrid approach to video retrieval by integrating the query-based (database) approach with CBR paradigm.  ... 
doi:10.1109/icme.2001.1237738 dblp:conf/icmcs/ChanLWZ01 fatcat:bqdg7eewr5c3dkh7wk3w4hkvii

Real-Time Urban Monitoring in Dublin Using Semantic and Stream Technologies [chapter]

Simone Tallevi-Diotallevi, Spyros Kotoulas, Luca Foschini, Freddy Lécué, Antonio Corradi
2013 Lecture Notes in Computer Science  
Processing these continuous flows of information and capturing insight poses unique technical challenges that span from response time constraints to data heterogeneity, in terms of format and throughput  ...  Our approach has been validated with real data collected on the field, as shown in our Dublin City video demonstration.  ...  For the sake of clarity and space, we illustrate our approach on the camera selection case, that is a complex case of KPI calculation (more complex queries and tighter time constraints).  ... 
doi:10.1007/978-3-642-41338-4_12 fatcat:dyumbzw6hfdtjiarp547q5qx7a

Partitioning of web applications for hybrid cloud deployment

Nima Kaviani, Eric Wohlstadter, Rodger Lea
2014 Journal of Internet Services and Applications  
Second, a new encoding of database query plans as integer programs, to enable simultaneous optimization of code and data placement in a hybrid cloud environment.  ...  In two case studies the approach results in up to 54% reduction in monetary costs compared to a premise only deployment and 56% improvement in response time compared to a naive partitioning where the application-tier  ...  In some cases, the total processing time is greater for the symmetric approach but in other cases it is greater for the asymmetric approach.  ... 
doi:10.1186/s13174-014-0014-0 fatcat:x6n5wepkjrfkzntgng7f6alpkm

Knowledge-infused and consistent Complex Event Processing over real-time and persistent streams

Qunzhi Zhou, Yogesh Simmhan, Viktor Prasanna
2017 Future generations computer systems  
However, existing work on CEP is largely limited to relational query processing, exposing two distinctive gaps for query specification and execution: (1) infusing the relational query model with higher  ...  In this article, we introduce a Knowledge-infused CEP (X-CEP) framework that provides domain-aware knowledge query constructs along with temporal operators that allow end-to-end queries to span across  ...  This work was also supported by grants to the second author from the Department of Electronics & Information Technology (DeitY), India, and the Robert Bosch Centre for Cyber Physical Systems (RBCCPS),  ... 
doi:10.1016/j.future.2016.10.030 fatcat:gvqp34dfvbfwjbefip5cu35tsm

Hybrid SPARQL Queries: Fresh vs. Fast Results [chapter]

Jürgen Umbrich, Marcel Karnstedt, Aidan Hogan, Josiane Xavier Parreira
2012 Lecture Notes in Computer Science  
For Linked Data query engines, there are inherent trade-offs between centralised approaches that can efficiently answer queries over data cached from parts of the Web, and live decentralised approaches  ...  We thus propose using coherence estimates to split a query into a sub-query for which the cached data have good fresh coverage, and a sub-query that should instead be run live.  ...  In [21] , we discussed a wide range of general strategies to implement the proposed hybrid query planning and processing approach.  ... 
doi:10.1007/978-3-642-35176-1_38 fatcat:ksowtns2vfgbhj5w65lexyft2a

Quality-aware sensor data collection

Qi Han, Doug Hakkarinen, Pruet Boonma, Junichi Suzuki
2010 International Journal of Sensor Networks (IJSNet)  
Sensor data collection typically comes with various quality requirements, e.g. the level of precision requested for temperature values, the time constraints for getting the data, or the percentage of data  ...  The paper concludes with suggestions for future research directions that have the potential to complete the framework and provide a holistic approach to sensor applications with diverse quality requirements  ...  Acknowledgements We would like to thank Iosif Lazaridis, Sharad Mehrotra and Nalini Venkatasubramanian for early discussions on related topics that have inspired the work presented here.  ... 
doi:10.1504/ijsnet.2010.033115 fatcat:gbrvnkwvhfg5be46co3znifb3m
« Previous Showing results 1 — 15 out of 32,595 results