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Vietnamese treebank construction and entropy-based error detection
Springer Science and Business Media LLC - Tập 49 - Trang 487-519 - 2015
Treebanks, especially the Penn treebank for natural language processing (NLP) in
English, play an essential role in both research into and the application of
NLP. However, many languages still lack treebanks and building a treebank can be
very complicated and difficult. This work has a twofold objective. Firstly, to
share our results in constructing a large Vietnamese treebank (VTB) with three
lev...
Photoluminescence Quenching of Nanocomposite Materials Used for Organic Solar Cells
Communications in Physics - Tập 24 Số 3S1 - 2014
In this work, we have studied the photoluminescence (PL) quenching of two
polymeric composites, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]
(MEH-PPV) and poly(3-hexylthiophene) (P3HT) in presence of nc-TiO\(_{2}\)
particles by PL- spectroscopy. PL quenching values are 19.2\(\text{\%}\) and
45.5\(\text{\%}\), for MEH-PPV+nc-TiO\(_{2}\) and P3HT+nc-TiO$_{2}$,
respectively. The obtained...
#photoluminescence (PL) quenching #nc-TiO$_{2}$ #MEH-PPV nc-TiO$_{2}$ #P3HT nc-TiO$_{2}$ #heterojunctions #organic solar cell (OSC)
Selection of Appropriate Number of CRs in Cooperative Spectrum Sensing over Suzuki Fading
VNU Journal of Science: Computer Science and Communication Engineering - Tập 32 Số 2 - 2016
With the rapid development of wireless communications, the radio spectrum is
becoming scarce. However, researchers have shown that many portions of licensed
spectrum remain unused for significant periods of time. Recently, cognitive
radio has been proposed as a very eective mechanism which allows Cognitive
Radio Users, or CRs to utilize the idle unused licensed bands.The main challenge
for a CR ...
AN EFFECTIVE REVERSIBLE DATA HIDING METHOD BASED ON PIXEL-VALUE-ORDERING
Journal of Computer Science and Cybernetics - Tập 36 Số 2 - Trang 139--158 - 2020
This paper presents a new effective reversible data hiding method based on
pixel-value-ordering (iGePVO-K) which is improvement of a recent GePVO-K method
that recently is considered as a PVO-used method having highest embedding
capacity. In comparison with GePVO-K method, iGePVO-K has the following
advantages. First, the embedding capacity of the new method is higher than that
of GePVO-K method b...
#Reversible data hiding #Pixel-value-ordering #Pixel prediction.
MODELING AMINO ACID SUBSTITUTIONS FOR WHOLE GENOMES
Journal of Computer Science and Cybernetics - - 2021
Modeling amino acid substitution process is a core task in bioinformatics. New
advanced sequencing technologies have generated huge datasets including whole
genomes from various species. Estimating amino acid substitution models from
whole genome datasets provides us unprecedented opportunities to accurately
investigate relationships among species. In this paper, we review
state-of-the-art computa...
#Amino acid substitution model #whole genomes #maximum likelihood estimation methods #phylogenomics
Symmetry Two-axis Tilt Angle Capacitive Sensor System
VNU Journal of Science: Mathematics - Physics - Tập 35 Số 2 - 2019
Abstract: This paper presents the design, fabrication and operation of a highly
symmetrical two-axis capacitive sensor. The proposed sensor consists of five
electrodes, including of an excitation electrode and two pairs of sensing
electrodes with exactly the same dimensions, arranged at identified
symmetrically locations on a 3D printed hollow sphere, which containing
dielectric medium formed by t...
XÂY DỰNG KHO NGỮ LIỆU SONG NGỮ CHẤT LƯỢNG CAO CHO CẶP NGÔN NGỮ HẠN CHẾ TÀI NGUYÊN
Tạp chí Khoa học Trường Đại học Tân Trào - Tập 9 Số 3 - 2023
Kho ngữ liệu song ngữ có chất lượng cao là một nguồn tài nguyên quan trọng cho
nhiều ứng dụng của xử lý ngôn ngữ tự nhiên, chẳng hạn như: dịch máy, tìm kiếm
liên ngôn ngữ, xây dựng từ điển song ngữ,… Đối với cặp ngôn ngữ hạn chế tài
nguyên (chẳng hạn như cặp ngôn ngữ Việt-Lào) thì rất khó để mà xây dựng được kho
ngữ liệu song ngữ có chất lượng cao vì tài nguyên song ngữ là hiếm. Trong bài
báo này,...
#Data mining #Big data #Bilingual corpus #Sentence alignment.
A nonlinear stability analysis of imperfect three-phase polymer composite plates
Mechanics of Composite Materials - Tập 49 - Trang 345-358 - 2013
An analytical investigation into the nonlinear response of a thin imperfect
laminated three-phase polymer composite plate consisting of a matrix and
reinforcing fibers and particles and subjected to mechanical loads is presented.
All formulations are based on the classical theory of plates with account of
interaction between the matrix and reinforcement, the geometrical nonlinearity,
and an initia...
Cooperative Caching in Two-Layer Hierarchical Cache-aided Systems
VNU Journal of Science: Computer Science and Communication Engineering - Tập 35 Số 1 - 2019
Caching has received much attention as a promising technique to overcome high
data rate and stringent latency requirements in the future wireless networks.
The premise of caching technique is to prefetch most popular contents closer to
end users in local cache of edge nodes, e.g., base station (BS). When a user
requests a content that is available in the cache, it can be served directly
without be...
A Feeding Network with Chebyshev Distribution for Designing Low Side-lobe Level Antenna Arrays
VNU Journal of Science: Computer Science and Communication Engineering - Tập 33 Số 1 - Trang - 2017
This paper proposes a feeding networking to gain low sidelobe levels for
microstrip linear antenna arrays. The procedure to design a feeding network
using Chebyshev weighting method will be proposed and presented. As a
demonstration, a feeding network for 8×1 elements linear array with Chebyshev
distribution weights (preset sidelobe level of -25 dB) has been designed. An
unequal T-junction pow...
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