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Your search keyword '"Shao, Yongyun"' showing total 3 results
Start Over Author "Shao, Yongyun"
3 results on '"Shao, Yongyun"'

1. A delay decomposition approach to admissibility for discrete-time singular delay systems.

Author

Shao, Yongyun, Liu, Xiaodong, Sun, Xin, and Zhang, Qingling

Subjects
*DECOMPOSITION method, *DISCRETE-time systems, *TIME delay systems, *LINEAR matrix inequalities, *INFORMATION theory, *INFORMATION science
Abstract

Abstract: This paper considers the problem of delay-dependent admissibility condition and performance analysis for discrete-time singular delay systems. By utilizing the delay decomposition approach, an improved delay-dependent admissibility condition is presented in terms of linear matrix inequalities (LMIs). This admissibility condition is much less conservative than some existing results and includes those as its special cases. Based on the proposed condition, a new delay-dependent bounded real lemma is also given, which guarantees the admissibility and the performance. Numerical examples are given to illustrate the effectiveness of the proposed method. [Copyright &y& Elsevier]

Published
2014
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2. The numerical study for the ground and excited states of fractional Bose–Einstein condensates.

Author

Zhang, Rongpei, Han, Zijian, Shao, Yongyun, Wang, Zhen, and Wang, Yu

Subjects
*EXCITED states, *BOSE-Einstein condensation, *GROSS-Pitaevskii equations, *HARMONIC oscillators, *DIFFUSION
Abstract

In this paper, we study the ground and first excited states of the fractional Bose–Einstein condensates (BEC) which is modeled by fractional Gross–Pitaevskii (GP) equation. We first introduce the normalized gradient flow method and prove its energy diminishing property. Then the weighted shifted Grünwald–Letnikov difference (WSGD) method is used to discretize the Gross–Pitaevskii equation. The corresponding normalization and energy diminishing property for the semi-discrete scheme are proved. For the time discretization, we use the implicit integration factor (IIF) method which decouples the diffusion and nonlinear terms separately. Finally the numerical methods are applied to compute the ground and first excited states of fractional BEC with harmonic oscillator, harmonic-plus-optical lattice and box potential. Our numerical results show that the ground and excited states in fractional GP equation differ from those of the standard (non-fractional) GP equation. [ABSTRACT FROM AUTHOR]

Published
2019
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3. Determination of temporal information granules to improve forecasting in fuzzy time series.

Author

Wang, Lizhu, Liu, Xiaodong, Pedrycz, Witold, and Shao, Yongyun

Subjects
*INFORMATION theory, *FUZZY systems, *TIME series analysis, *PARTITIONS (Mathematics), *IMAGE segmentation, *ROBUST control
Abstract

Highlights: [•] Partitioning the universe of discourse in consideration of temporal information. [•] Determining intervals by time series segmentation and information granules. [•] Using the proposed method forecasting accuracies were significantly improved. [•] These intervals carry well-defined semantics. [•] The proposed method is very robust and stable to forecast in fuzzy time series. [ABSTRACT FROM AUTHOR]

Published
2014
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