Author Search Result

[Author] Sha LI(2hit)

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  • Citation Count Prediction Based on Neural Hawkes Model

    Lisha LIU  Dongjin YU  Dongjing WANG  Fumiyo FUKUMOTO  

     
    PAPER-Biocybernetics, Neurocomputing

      Pubricized:
    2020/08/03
      Vol:
    E103-D No:11
      Page(s):
    2379-2388

    With the rapid development of scientific research, the number of publications, such as scientific papers and patents, has grown rapidly. It becomes increasingly important to identify those with high quality and great impact from such a large volume of publications. Citation count is one of the well-known indicators of the future impact of the publications. However, how to interpret a large number of uncertain factors of publications as relevant features and utilize them to capture the impact of publications over time is still a challenging problem. This paper presents an approach that effectively leverages a variety of factors with a neural-based citation prediction model. Specifically, the proposed model is based on the Neural Hawkes Process (NHP) with the continuous-time Long Short-Term Memory (cLSTM), which can capture the aging effect and the phenomenon of sleeping beauty more effectively from publication covariates as well as citation counts. The experimental results on two datasets show that the proposed approach outperforms the state-of-the-art baselines. In addition, the contribution of covariates to performance improvement is also verified.

  • Cramer-Rao Bound on Passive Source Localization for General Gaussian Noise

    Sha LI  Brian L.F. DAKU  

     
    PAPER-Engineering Acoustics

      Vol:
    E93-A No:5
      Page(s):
    914-925

    This paper focuses on the development of Cramer-Rao Bound (CRB) expressions for passive source location estimation in various Gaussian noise environments. The scenarios considered involve an unknown deterministic source signal with a short time duration, and additive general Gaussian noise. The mathematical derivation procedure presented is applicable to non-stationary Gaussian noise problems. Specifically, explicit closed-form CRB expressions are presented using the spectrum representation of the signal and noise for stationary Gaussian noise cases.

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