Bảng thống kê danh sách bài báo đăng trên tạp chí Quốc tế năm 2011

stt Tên bài mã số, thời gian thực hiện Tác giả Tóm tắt nội dung Tạp chí đăng tải
Tạp chí cấp Quốc tế
1 A Comparative Study on Hardware Platforms for Wireless Sensor Networks Vũ Chiến Thắng
Nguyễn Chấn Hùng
Nguyễn Hữu Thanh
Recently, Wireless Sensor Networks (WSNs) attract a great deal of research attention, and are envisioned to support a variety of applications, including building monitoring, environment control, wild-life habitat monitoring, forest fire detection, industry automation, military, security, and health-care. Over the years, we have seen a variety of hardware platforms for WSNs to facilitate developing WSN applications. In this paper, we provide a comprehensive review of existing hardware platforms for WSNs. We first present the hardware architecture of a wireless sensor node. We then survey the major hardware platforms for WSNs and present a comparison of these hardware platforms. Finally we present some recommendations from the perspectives of hardware platform developers and hardware platform users. The authors hope that making information about existing hardware platforms will assist researchers working in this area to appreciate the diversity of platforms available to them and to help them select the most appropriate platform for their purposes International journal on Advanced Science Engineering Information Technology Tr 70-74, 2011
2 A Novel Spectral conversion based Approach for Noisy Speech Enhancement Đỗ Huy Khôi
Phùng Trung Nghĩa
Nguyễn Hữu Công
Nguyễn Văn Tảo
Thái Quang Vinh
Present noisy speech enhancements algorithms are
efficiently used for additive noise but not very good for
convolutive noise as reverberation. And even for additive noise,
the estimation of noise, when only one microphone source is
provided, is based on the assumption of a slowly varying noise
environment, commonly assumed as stationary noise. However,
real noise is non-stationary noise, which difficult to be
efficiently estimated. Spectral conversion can be used for
predicting the vocal tract (spectral envelope) parameters of
noisy speech without estimating the parameters of the noise
source. Therefore, it can be applied to a general speech
enhancement model, for both stationary and non-stationary
additive noise environment, as well as convolutive noise
environment, when only one microphone source is provided. In
this paper, we propose a spectral conversion based speech
enhancement method. The experimental results show that our
method outperforms traditional methods.
International Journal of Information and Electronics Engineering Tr 281-285, 2011
3 An Implicit Iteration Method for Variational Inequalities over the Set of Common Fixed Points for a Finite Family of Nonexpansive Mappings in Hilbert Spaces Nguyễn Bường, Nguyễn Thị Quỳnh Anh We introduce a new implicit iteration method for finding a solution for a variational inequality involving Lipschitz continuous and strongly monotone mapping over the set of common fixed points for a finite family of nonexpansive mappings on Hilbert spaces.  Fixed Point Theory and Applications
Volume 2011 (2011), Article ID 276859, 10 pages
4 On the optimal shape parameter for Gaussian radial basis function finite difference approximation of the Poisson equation. Comput. Math. Appl., Oleg Davydov, Đặng Thị Oanh We investigate the influence of the shape parameter in the meshless Gaussian RBF finite difference method with irregular centres on the quality of the approximation of the Dirichlet problem for the Poisson equation with smooth solution. Numerical experiments show that the optimal shape parameter strongly depends on the problem, but insignificantly on the density of the centres. Therefore, we suggest a multilevel algorithm that effectively finds near-optimal shape parameter, which helps to significantly reduce the error. Comparison to the finite element method and to the generalised finite differences obtained in the flat limits of the Gaussian RBF is provided. Computers and Mathematics with Applications 62(2011)
5 Adaptive meshless centres and RBF stencils for Poisson equation Oleg Davydov, Đặng Thị Oanh We consider adaptive meshless discretisation of the Dirichlet problem for Poisson equation based on numerical differentiation stencils obtained with the help of radial basis functions. New meshless stencil selection and adaptive refinement algorithms are proposed in 2D. Numerical experiments show that the accuracy of the solution is comparable with, and often better than that achieved by the mesh-based adaptive finite element method. Journal of Computational Physics. (Trong danh muc ISI) 230(2011)
6 Fast hash functions based on controlled permutations Đỗ Thị Bắc, Hồ Ngọc Duy Using variable bit permutations there are designed hash functions prossessing high performance while hardware, firmware, and software implementation. Controlled bit permutation operation have been selected in correspondence with earlier proposed topology of the permutation network for implementing on its base the controlled bit permutation in struction oriented to embedding in the mass microprocessors. Due to the last fact the designed algorithms for computing cryptographic checksums are perspective for application as fast software-suitable hash function. Вопросы защиты информации. 2, 2-6, 2010.
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