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  • 2005-2009  (9)
  • Comparative Studies. Non-European Languages/Literatures  (9)
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  • 2005-2009  (9)
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  • Comparative Studies. Non-European Languages/Literatures  (9)
RVK
  • 1
    Online Resource
    Online Resource
    Time domain visualization using acoustic holography implemented by temporal and spatial complex envelope
    Acoustical Society of America (ASA) ; 2009
    In:  The Journal of the Acoustical Society of America Vol. 126, No. 4 ( 2009-10-01), p. 1659-1662
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 126, No. 4 ( 2009-10-01), p. 1659-1662
    Abstract: Spatial envelope was proposed to show the location of acoustic sources and overall radiation pattern by the authors [C.-S. Park and Y.-H. Kim, J. Acoust. Soc. Am. 125, 206–211 (2009)]. The envelope can provide sufficient information on where the sources are and how the energy propagates into space. This concept is certainly useful for time domain acoustic holography since one can utilize not only spatial envelope to envisage what one needs to know but also temporal envelope to reduce the number of data. A holographic process to obtain spatial envelope is therefore introduced and verified, and how much one can reduce the processing time by implementing envelopes is compared with the conventional holography.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3203919
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2009
    detail.hit.zdb_id: 1461063-2
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  • 2
    Online Resource
    Online Resource
    A Twin-Candidate Model for Learning-Based Anaphora Resolution
    MIT Press ; 2008
    In:  Computational Linguistics Vol. 34, No. 3 ( 2008-09), p. 327-356
    Details
    In: Computational Linguistics, MIT Press, Vol. 34, No. 3 ( 2008-09), p. 327-356
    Abstract: The traditional single-candidate learning model for anaphora resolution considers the antecedent candidates of an anaphor in isolation, and thus cannot effectively capture the preference relationships between competing candidates for its learning and resolution. To deal with this problem, we propose a twin-candidate model for anaphora resolution. The main idea behind the model is to recast anaphora resolution as a preference classification problem. Specifically, the model learns a classifier that determines the preference between competing candidates, and, during resolution, chooses the antecedent of a given anaphor based on the ranking of the candidates. We present in detail the framework of the twin-candidate model for anaphora resolution. Further, we explore how to deploy the model in the more complicated coreference resolution task. We evaluate the twin-candidate model in different domains using the Automatic Content Extraction data sets. The experimental results indicate that our twin-candidate model is superior to the single-candidate model for the task of pronominal anaphora resolution. For the task of coreference resolution, it also performs equally well, or better.
    Type of Medium: Online Resource
    ISSN: 0891-2017 , 1530-9312
    URL: Article
    DOI: 10.1162/coli.2008.07-004-R2-06-57
    RVK:
    EQ 1000
    Language: English
    Publisher: MIT Press
    Publication Date: 2008
    detail.hit.zdb_id: 602577-8
    detail.hit.zdb_id: 2025069-1
    SSG: 7,11
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Complex envelope implementation for fast and efficient acoustic holography
    Acoustical Society of America (ASA) ; 2006
    In:  The Journal of the Acoustical Society of America Vol. 120, No. 5_Supplement ( 2006-11-01), p. 3213-3213
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 120, No. 5_Supplement ( 2006-11-01), p. 3213-3213
    Abstract: Acoustic holography allows us to predict the spatial pressure distribution on any surface of interest. To implement this method, we normally use Fourier transform in time and space domain. It is noteworthy that the data size is so huge that it takes a long time to calculate pressure field. Moreover, the reconstructed pressure field is frequently too complex to observe the characteristics of pressure field. One possible candidate is the complex envelope. The complex envelope in time domain is well known and widely used in various fields. We have attempted to extend this method in the space domain, so that we can have a rather compact sound pressure picture that provides the information we need, for example where sound sources are. This belongs to what we call the analysis problem of acoustic holography. We might want to draw some parts in detail but other parts in a rather coarse way. The complex envelope in space certainly meets this objective. First we start with the simplest case. We devise a monopole complex envelope. Then we extend it to finite size source case. Various holography examples are reprocessed according to what we propose and demonstrate how this method is practically fast and how it provides a better picture for analyzing the sound field.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4788140
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2006
    detail.hit.zdb_id: 1461063-2
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Fault localization of moving machinery in a noisy environment
    Acoustical Society of America (ASA) ; 2007
    In:  The Journal of the Acoustical Society of America Vol. 122, No. 5_Supplement ( 2007-11-01), p. 3090-3090
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 122, No. 5_Supplement ( 2007-11-01), p. 3090-3090
    Abstract: Faults of rotating parts of a machine normally generate unexpected frequency band or impulsive sound, which has a period when it moves with a constant speed. The former can be detected by the moving frame acoustic holography method [S.-H. Park and Y.-H. Kim, ‘‘An improved moving frame acoustic holography for coherent bandlimited noise,’’ J. Acoust. Soc. Am. 104, 3179–3189 (1998)]. We have attempted to apply the method to the latter case in the test site. The keywords are, therefore, the periodic impulsive sound, which is obviously different from those which can be visualized by the method, and the signal-to-noise ratio, which determines the success of early-fault detection. This research shows how the problems related with these keywords can be resolved. The main idea is that periodic impulsive signal can be expressed by an infinite set of discrete pure tones. This enables us to obtain alot of holograms that visualize periodic impulsive sound field and noise; therefore, holograms can be averaged to improve the signal-to-noise ratio until having reliable information that exhibits where the impulsive sources are. Theory, experiment, and application results to the train on a test rig are described. [Work supported by BK21 and KRRI.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.2943042
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2007
    detail.hit.zdb_id: 1461063-2
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Selection of coding parameters based on spectral content of a speech signal
    Acoustical Society of America (ASA) ; 2005
    In:  The Journal of the Acoustical Society of America Vol. 118, No. 1 ( 2005), p. 27-
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 118, No. 1 ( 2005), p. 27-
    Type of Medium: Online Resource
    ISSN: 0001-4966
    URL: Article
    DOI: 10.1121/1.1999421
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2005
    detail.hit.zdb_id: 1461063-2
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  • 6
    Online Resource
    Online Resource
    Development of novel biologically inspired directional microphones
    Acoustical Society of America (ASA) ; 2006
    In:  The Journal of the Acoustical Society of America Vol. 120, No. 5_Supplement ( 2006-11-01), p. 3158-3158
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 120, No. 5_Supplement ( 2006-11-01), p. 3158-3158
    Abstract: The development of novel directional microphones for hearing aids is described. The mechanisms underlying the design of these unusual microphones were inspired by our earlier study of the ears of the parasitoid fly Ormia ochracea [Miles, et al., J. Acoust. Soc. Am. 98, 3059–3070 (1995)]. The structure of Ormia’s ears inspired new approaches to the design of directional microphones that have the potential to be more sensitive and have lower thermal noise than typical miniature microphones. The mechanisms for directional hearing in this animal are discussed along with the engineering design concepts that they have inspired. Microphones have been fabricated out of silicon that employ either capacitive sensing or optical sensing to convert the diaphragm motion into an electronic signal. Measured results indicate that the directivity of these microphones is very similar to that of an ideal first-order differential microphone. In addition, novel microphone diaphragms have been fabricated that posses a second-order directional response. These can be used to achieve a significant reduction of unwanted background acoustic noise in hearing aid applications. [Work supported by NIH Grant 5R01DC005762-03, Sensing and Processing for Directional Hearing Aids, to RNM.]
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.4787858
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2006
    detail.hit.zdb_id: 1461063-2
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  • 7
    Online Resource
    Online Resource
    Pitch determination based on weighting of pitch lag candidates
    Acoustical Society of America (ASA) ; 2008
    In:  The Journal of the Acoustical Society of America Vol. 123, No. 3 ( 2008), p. 1233-
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 123, No. 3 ( 2008), p. 1233-
    Type of Medium: Online Resource
    ISSN: 0001-4966
    URL: Article
    DOI: 10.1121/1.2901357
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2008
    detail.hit.zdb_id: 1461063-2
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  • 8
    Online Resource
    Online Resource
    Space domain complex envelopes: Definition and a spatial modulation method
    Acoustical Society of America (ASA) ; 2009
    In:  The Journal of the Acoustical Society of America Vol. 125, No. 1 ( 2009-01-01), p. 206-211
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 125, No. 1 ( 2009-01-01), p. 206-211
    Abstract: When one visualizes a sound field as a means of treating noise sources, a detailed variation of the sound field is not required. It is sufficient to see source locations and overall variation of the field. A complex envelope in space can provide adequate information that one wishes to get because an envelope shows a gross change in signal. In other words, to interpret overall variation of sound fields in terms of a complex envelope is attempted. To achieve this objective, spatial complex envelopes have been defined firstly, and then a spatial modulation method to obtain the envelope has been theoretically developed and verified.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.3006385
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2009
    detail.hit.zdb_id: 1461063-2
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  • 9
    Online Resource
    Online Resource
    A space domain complex envelope
    Acoustical Society of America (ASA) ; 2007
    In:  The Journal of the Acoustical Society of America Vol. 122, No. 5_Supplement ( 2007-11-01), p. 3089-3089
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 122, No. 5_Supplement ( 2007-11-01), p. 3089-3089
    Abstract: Sound visualization tools, for example, beam forming and acoustic holography, exhibit the spatial look of sound in time or frequency domain. However, they normally require a significant amount of computation time to draw well the sound picture in space. The picture contains a great deal of information: Sound pressure distribution, intensity pattern, or energy information with respect to space. The information is often far more than what we need in practice. For example, when we want to know only the location of the sound sources and somewhat averaged sound pressure distribution, we need a means that can provide only what we need. The complex envelope in time domain can be a good starting idea to deal with the problems we have. A method to generate a spatial domain envelope has been theoretically developed. We found that the method not only has an advantage to show rather simple spatial sound distribution, but also reduce significantly the computation time. The latter makes it possible to see the sound picture faster than before: About ten times faster. This method has been applied to many practical examples: For example, sound from a musical instrument and sound from machinery.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.2943038
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 2007
    detail.hit.zdb_id: 1461063-2
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