http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Nguyen, T.H.,Than, V.T.,Thanh, H.D.,Nguyen, V.Q.,Nguyen, K.H.,Nguyen, D.T.,Park, J.H.,Chung, I.S.,Jeong, D.G.,Chang, K.T.,Oh, T.K.,Kim, W. Pergamon Press 2015 Comparative immunology, microbiology and infectiou Vol.42 No.-
In Vietnam, highly pathogenic avian influenza (HPAI), such as that caused by H5N1 viruses, is the most highly contagious infectious disease that has been affecting domestic poultry in recent years. Vietnam might be an evolutionary hotspot and a potential source of globally pandemic strains. However, few studies have reported viruses circulating in the south-central region of Vietnam. In the present study, 47 H5N1-positive samples were collected from both vaccinated and unvaccinated poultry farms in the South Central Coast region of Vietnam during 2013-2014, and their genetic diversity was analyzed. A common sequence motif for HPAI virus was identified at HA-cleavage sites in all samples: either RERRRKR/G (clades 2.3.2.1c and 2.3.2.1a) or REGRRKKR/G (clade 1.1.2). Phylogenetic analysis of HA genes identified three clades of HPAI H5N1: 1.1.2 (n=1), 2.3.2.1a (n=1), and 2.3.2.1c (n=45). The phylogenetic analysis indicated that these Vietnamese clades may have evolved from Chinese and Cambodian virus clades isolated in 2012-2013 but are less closely related to the clades detected from the Tyva Republic, Bulgaria, Mongolia, Japan, and Korea in 2009-2011. Detection of the coexistence of virus clades 2.3.2.1 and the very virulent 1.1.2 in the south-central regions suggests their local importance and highlights concerns regarding their spread, both northwards and southwards, as well as the potential for reassortment. The obtained data highlight the importance of regular identification of viral evolution and the development and use of region-specific vaccines.
Tran, Q.V.,Kirane, M.,Nguyen, H.T.,Nguyen, V.T. Academic Press 2017 Journal of mathematical analysis and applications Vol.446 No.1
<P>This work is concerned with solving the Cauchy problem for quasilinear elliptic equations whose exponential instability is manifestly seen by the catastrophic growth in the representation of the exact solution. Our proposed regularization procedure consists in damping the unbounded terms in the representation. Moreover, we show that its solution converges to the exact solution uniformly and strongly in L-2 under a priori assumptions on the exact solution. In order to verify our analysis and the accuracy of the numerical procedures, we exhibit two numerical examples. Our main tools for simulation are the trigonometric polynomial approximation, and the fast Fourier transform in combination with the cubic Hermite interpolation. (C) 2016 Elsevier Inc. All rights reserved.</P>
A flapper to mimic flapping frequency of a beetle using a piezoceramic actuator
Q-Tri Truong(트롱쾅트리),Q-V. Nguyen(구옌쿠옥비엣),Hoon C. Park(박훈철),Nam S. Goo(구남서),Doyoung Byun(변도영) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In this paper, we have demonstrated an approach to increase flapping frequency of a previously developed flapper, which is actuated by Lightweight Piezo-Composite Actuator (LIPCA). This is an effort to mimic the flapping motion of Allomyrina Dichotoma, of which flapping frequency is typically 30㎐. For this purpose, the dynamic characteristic of the LIPCA and the parameter study of a four-bar linkage have been studied. The topology of the linkage system was investigated for the amplification of rotation angle and the moment transfer efficiency. Based on the results we suggested a new design of the linkages might provide a higher flapping frequency. The new four-bar linkage system was fabricated and tested to verify the possibility. The optimal flapping frequency of the modified flapper was measured to be about 18㎐. It is about 100% increase compared to the flapping frequency of the previous flapper.
A piezoelectrically-driven flapping device to mimic beetle flight
Q.T. Truong,Q.V. Nguyen,H.C. Park,D. Byun,N.S. Goo 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
In order to mimic the flapping motion of Allomyrina Dichotoma of which flapping frequency is typically 30Hz. we present an approach to increase the flapping frequency of a previously developed flapper actuated by Lightweight Piezo-Composite Actuator (LIPCA). To increase the flapping frequency of the flapper. the dynamic characteristics of the LIPCA and parameter study of a four-bar linkage have been studied. In a parametric study, it was found that an appropriate combination of linkage lengths can provide a better moment transmission at a given flapping angle amplification. A new four-bar linkage system was fabricated based on the parametric study and then tested to verify the possibility. The test results showed that the optimal flapping frequency of the modified flapper was measured to be about 17Hz, which is about 88.9% increase compared to that of the previous flapper. The modified flapper could also improve 112.5% in horizontal force. However, the flapping angle and vertical force were reduced about 20% and 8.7% respectively.