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Thi Tran Nguyen Binh, Vietnam

Hai Phong Medical University is a public university established in September 1979 in Hai Phong, Vietnam.In 2006, the Minister of Health approved the development strategy of Hai Phong Medical University to be the University of Medicine and Pharmacy in Hai Phong, adding new faculties: the faculty of pharmacy, the faculty of odonto-stomatology, the faculty of public health and the faculty of nursing. Wikipedia.

Trung N.T.,Quy Nhon University | Thu Trang N.T.,Hai Phong Medical University | Ngan V.T.,Quy Nhon University | Quang D.T.,Hue University | Nguyen M.T.,Catholic University of Leuven
RSC Advances | Year: 2016

Interactions of ethylene and its 1,2-dihalogenated derivatives with CO2 induce the formation of twenty four molecular complexes with stabilization energies in the range of 1.1 to 7.5 kJ mol-1 as computed at the CCSD(T)/aug-cc-pVTZ//MP2/aug-cc-pVDZ level. The stability of the parent C2H4⋯CO2 complex is due to a π⋯π∗ interaction which has not yet been reported in the complexes of CO2-philic compounds and CO2. The cis-XCH=CHX⋯CO2 complexes are found to be slightly more stable than the trans-XCH=CHX⋯CO2, with X = F, Cl and Br. Generally, the overall stabilization energy of each complex is determined by the C-H⋯O hydrogen bond and the C-X⋯C Lewis acid-base interaction, in which the latter plays a larger role. Substitution of two H atoms in CH2=CH2 by the same halogen atoms stabilizes the complexes XCH=CHX⋯CO2, and for the same dihalogenated derivatives, the stability of XCH=CHX⋯CO2 tends to increase from X = F via Cl and to Br. The obtained results suggest that the contraction of the C-H bond involved in the C-H⋯O hydrogen bond and the blue-shift of its stretching frequency depend not only on a polarization of the C-H bond in the isolated monomer but also on the geometric shape of the complex formed. © The Royal Society of Chemistry 2016. Source

Dai H.Q.,Quy Nhon University | Tri N.N.,Quy Nhon University | Thu Trang N.T.,Hai Phong Medical University | Trung N.T.,Quy Nhon University
RSC Advances | Year: 2014

The interactions of the host molecules CH3COCHR2 (R = CH3, H, F, Cl, Br) with the guest molecules CO2 and FCN (X = F, Cl, Br) induce significantly stable complexes with stabilization energies, obtained at the CCSD(T)/6-311++G(3df,2pd)//MP2/6-311++G(2d,2p) level, in the range of 9.2-14.5 kJ mol-1 by considering both ZPE and BSSE corrections. The CH3COCHR2⋯XCN complexes are found to be more stable than the corresponding CH3COCHR2⋯ CO2 ones. The overall stabilization energy has contributions from both the >CO⋯C Lewis acid-base and C-H⋯O(N) hydrogen bonded interactions, in which the crucial role of the former is suggested. Remarkably, we propose a general rule to understand the origin of the C-H⋯O(N) hydrogen bonds on the basis of the polarization of a C-H bond of a proton donor and the gas phase basicity of a proton acceptor. In addition, the present work suggests that the >CO group can be a valuable candidate in the design of CO2-philic and adsorbent materials, and in the extraction of cyanide derivatives from the environment. © 2014 The Royal Society of Chemistry. Source

Le D.-N.,Hai Phong Medical University
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST | Year: 2015

In this paper, we proposed a novel Min-Max Ant System algorithm for dynamic resource allocation with many of service classes while maximizing the provider’s utility in service-oriented networks. The model considers a pricing scheme for the offered services and the quality of service (QoS) requirements of each service class, which operates under a probabilistic delay bound constraint. The goal is to investigate how the utility function and the resource allocation respond to changes of various parameters given the QoS requirements of each service class. Our algorithm performance is evaluated through numerical studies and our solution is approximated the optimal solution. The computational results showed that this approach is currently among the best performing algorithms and much better than previous studies for this problem. © 2015, Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, All rights Reserved. Source

Phuong V.T.,Quy Nhon University | Trang N.T.T.,Hai Phong Medical University | Vo V.,Quy Nhon University | Trung N.T.,Quy Nhon University
Chemical Physics Letters | Year: 2014

Interactions of CO2 with CH3SZCHX2 (ZO, S; XH, CH3, F, Cl, Br) induce significantly stable complexes with interaction energies from -13.7 to -16.4 kJ mol-1 (MP2/aug-cc-pVTZ//MP2/6-311++G(2d,2p)). Remarkably, some stable shapes of CH3SZCH3CO2 are revealed for the first time. Substitution of two H atoms in a CH3 of CH3SZCH 3 by two X alike groups makes CH3SZCHX2CO 2 more stable than CH3SZCH3CO2, and their stability increases in the order F < Cl < Br < CH3. The >SO is stronger than the >SS in interacting with CO2, and they both can be valuable candidates in the design of CO2-philic materials and in the findings of materials to adsorb CO2. © 2014 Elsevier B.V. All rights reserved. Source

Long H.V.,University of Transport and Communications | Son N.T.K.,Hanoi University | Ha N.T.M.,Hai Phong Medical University | Son L.H.,Vietnam National University, Hanoi
Fuzzy Optimization and Decision Making | Year: 2014

Fuzzy hyperbolic partial differential equation, one kind of uncertain differential equations, is a very important field of study not only in theory but also in application. This paper provides a theoretical foundation of numerical solution methods for fuzzy hyperbolic equations by considering sufficient conditions to ensure the existence and uniqueness of fuzzy solution. New weighted metrics are introduced to investigate the solvability for boundary valued problems of fuzzy hyperbolic equations and an extended result for more general classes of hyperbolic equations is initiated. Moreover, the continuity of the Zadeh’s extension principle is used in some illustrative examples with some numerical simulations for $$\alpha $$α-cuts of fuzzy solutions. © 2014, Springer Science+Business Media New York. Source

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