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database Abstractions for Managing Sensor Network Data

PROCEEDINGS OF THE IEEE 2010年第11期98卷 1879-1886页

作者： Madden, Samuel MIT CSAIL Cambridge MA 02139 USA

Sensor networking hardware, networking, and operating system software has matured to the point that the major challenges facing the field now have to do with storing, cleaning, and querying the data such networks produce. In this paper, we survey several research systems designed for managing sensor data using declarative database-like abstractions from the database community and specifically the Massachusetts Institute of Technology (MIT, Cambridge) database group. The systems we discuss are designed to help prioritize data collection in the face of intermittent bandwidth, clean and smooth data using statistical models stored inside the database, and run declarative queries over probabilistic data.

关键词： database management systems database query processing intelligent sensors

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A Prototype for querying over LZCS Transformed Documents

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IEEE LATIN AMERICA TRANSACTIONS 2009年第3期7卷 353-360页

作者： Adiego, J. Navarro, G. de la Fuente, P. Univ Valladolid Dept Informat E-47002 Valladolid Spain Univ Chile Dept Ciencias Computac Santiago Chile

We present novel query algorithms that efficiently support some popular XPath operations over LZCS-transformed documents. The LZCS transformation compresses a redundant XML collection without loss. The main idea of LZCS, inspired by Lempel-Ziv compression, is to replace whole substructures by previous occurrences thereof, and our algorithms try to reuse the work done over those repeating substructures. The algorithms are implemented in a prototype called lzcs-grep. The main advantage of lzcs-grep is that it processes the documents in transformed form, obtaining very fast response times in combination with low memory requirements. Our experimental results show that lzcs-grep is competitive with other XPath processors even over untransformed documents, and by far unbeaten when it can operate over their LZCS-transformed version.

关键词： database query processing query Languages Data Compression

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Fast query by example of environmental sounds via robust and efficient cluster-based indexing

Fast query by example of environmental sounds via robust and...

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33rd IEEE International Conference on Acoustics, Speech and Signal processing

作者： Xue, Jiachen Wichern, Gordon Thornburg, Harvey Spanias, Andreas Arizona State Univ Tempe AZ 85281 USA

ISBN: (纸本)9781424414833

There has been much recent progress in the technical infrastructure necessary to continuously characterize and archive all sounds, or more precisely auditory streams, that occur within a given space or human life. Efficient and intuitive access, however, remains a considerable challenge. In specifically musical domains, i.e., melody retrieval, query-by-example (QBE) has found considerable success in accessing music that matches a specific query. We propose an extension of the QBE paradigm to the broad class of natural and environmental sounds, which occur frequently in continuous recordings. We explore several cluster-based indexing approaches, namely non-negative matrix factorization (NMF) and spectral clustering to efficiently organize and quickly retrieve archived audio using the QBE paradigm. Experiments on a test database compare the performance of the different clustering algorithms in terms of recall, precision, and computational complexity. Initial results indicate significant improvements over both exhaustive search schemes and traditional K-means clustering, and excellent overall performance in the example based retrieval of environmental sounds.

关键词： acoustic signal analysis database query processing clustering methods hidden Markov models

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L₂-Signature Quadratic Form Distance for Efficient query processing in Very Large Multimedia databases

<i>L</i><sub>2</sub>-Signature Quadratic Form Distance for E...

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17th International Multimedia Modeling Conference, MMM 2011

作者： Beecks, Christian Uysal, Merih Seran Seidl, Thomas Rhein Westfal TH Aachen Data Management & Data Explorat Grp Aachen Germany

ISBN: (纸本)9783642178313

The highly increasing amount of multimedia data leads to extremely growing databases which support users in searching and exploring the database contents. Content-based searching for similar objects inside such vivid and voluminous multimedia databases is typically accompanied by an immense amount of costly similarity computations among the stored data objects. In order to Process similarity computations arising in content-based similarity queries efficiently, we present the L-2-Signature Quadratic Form Distance which maintains high retrieval quality and improves the computation time of the Signature Quadratic Form Distance by more than one order of magnitude. As a result, we process millions of similarity computations in less than a few seconds.

关键词： Signature Quadratic Form Distance feature signature content-based retrieval multimedia database database searching database query processing

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Optimal Path Selection for a Universal Relation View of Relational databases 2

Optimal Path Selection for a Universal Relation View of Rela...

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2nd International Conference on Computer Science and Software Engineering (CSASE)

作者： Singh, Divij G. Watanobe, Yutaka Univ Aizu Dept Informat Syst Aizu Wakamatsu Fukushima Japan

ISBN: (纸本)9781665426329

querying complex relational databases can be a complex process for skilled and unskilled users. Adapting Universal Relation View provides a system to make this easier for all users. This system is meant to be implemented as a layer over a traditional view using a querying language. This paper considers that in order to implement this system, two components are needed;a query language, for ease of use, and a query algorithm. The study proposes a universal relation approach and joins based on an optimal path selection procedure for ease of querying. Using this system, unskilled users may easily query databases, and skilled users may find it easier than standard querying.

关键词： Relational databases database management systems database query processing database searching query languages

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CONTINUOUS OBSERVATION AND ARCHIVAL OF ACOUSTIC SCENES USING WIRELESS SENSOR NETWORKS

CONTINUOUS OBSERVATION AND ARCHIVAL OF ACOUSTIC SCENES USING...

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16th International Conference on Digital Signal processing

作者： Wichern, Gordon Kwon, Homin Spanias, Andreas Fink, Alex Thornburg, Harvey Arizona State Univ Dept Elect Engn Tempe AZ 85287 USA

ISBN: (纸本)9781424432974

Acoustic scene analysis has proven an invaluable tool in diverse fields ranging from biology to defense and security. Wireless sensor networks present an attractive means of implementing an acoustic monitoring system due to their low cost and ability to be easily deployed in a wide range of areas. In this paper acoustic features are extracted at the sensor level, and then transmitted to the base station where acoustic events are segmented using a dynamic Bayseian network. Segmented events are then indexed with the time and location where they occurred, allowing users to link events in terms of time, place, and acoustic characteristics. Our experiments show that a feature set that allows for general characterization of diverse sound environments can be extracted at the sensor level, while an illustrative example shows the segmentation algorithm detecting footsteps in low SNR conditions.

关键词： Wireless sensor networks Acoustic scene analysis Acoustic signal detection database query processing

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Derivation principle in advanced fuzzy queries

Derivation principle in advanced fuzzy queries

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IEEE International Conference on Fuzzy Systems

作者： Goncalves, M Tineo, L Univ Simon Bolivar Dept Computac Caracas 1080A Venezuela

ISBN: (纸本)0780391586

Traditional Information Storage and Recovery Systems are based on Classic Logic and Set Theory, limiting expression of user preferences. Fuzzy Logic has been proposed for information representation and manipulation in databases, being the current tendency to study mechanisms of Flexible querying to crisp databases. SQLf has been one of the efforts in this tendency. We present the use of the X-cut for processing fuzzy queries involving advanced constructor blocks in both SQLf2 and SQLf3. These languages are evolutions of SQLf according to both SQL2 and SQL3 norms with fuzzy set based extensions. The scope of this work is queries with predefined quantifiers, recursive queries, views, subqueries and case constructor. Preceding works have defined the use of lambda-cut for the evaluation of fuzzy queries as the Derivation Principle. This principle has been used before for other kind of queries in SQLF..

关键词： database query processing fuzzy systems query languages

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The research and realization of the automatically forming system of operation tickets

The research and realization of the automatically forming sy...

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International Conference on Power System Technology

作者： Xiang, TY Wu, HQ Xie, F Li, Y Nie, Y School of Electric Engineering Wuhan University China Provincial Electric Power Bureau of Hubei China Wuhan University China Zhangjiajie Electric Power Bureau China

ISBN: (纸本)0780374592

With the thinking habits and working manner of the substation workers, this paper gives an automatically producing system of the transformer substation's operation tickets, which comes from practice and has a bright character. Basing on the method of oriented-objected, and combining with the graphical interfaces, this system confirms the electric equipment's attribute and the operation done to the attribute in order to complete the designs of its functions. The core of this system is the topologizing of the equipment's hookup and the realization of the reasoning machine.

关键词： case based reasoning database management systems database query processing expert systems SCADA systems state feedback substations topology user interfaces visual languages

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query by example of audio signals using Euclidean distance between Gaussian mixture models

Query by example of audio signals using Euclidean distance b...

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32nd IEEE International Conference on Acoustics, Speech and Signal processing

作者： Helen, Marko Virtanen, Tuomas Tampere Univ Technol Inst Signal Proc FIN-33720 Tampere Finland

ISBN: (纸本)9781424407286

query by example of multimedia signals aims at automatic retrieval of media samples from a database, which are similar to a user-provided example. This paper proposes a method for query by example of audio signals. The method calculates a set of acoustic features from the signals and models their probability density functions (pdfs) using Gaussian mixture models. The method measures the similarity between two samples using the Euclidian distance between their pdfs. A novel method for calculating the closed form solution of the distance is proposed. Simulation experiments show that proposed method enables higher retrieval accuracy than the reference methods.

关键词： acoustic signal processing database query processing feature extraction

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A Prototype for querying over LZCS Transformed Documents

A Prototype for Querying over LZCS Transformed Documents

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13th Conference on Software Engineering and databases

作者： Adiego, J. Navarro, G. de la Fuente, P. Univ Valladolid Dept Informat E-47002 Valladolid Spain Univ Chile Dept Ciencias Computac Santiago Chile

关键词： database query processing query Languages Data Compression

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