Phương Nhi

Nguyen, Huy Tuan Bui, Thanh Duy Nguyen, Dang Minh Vo, Anh Khoa We consider an inverse heat conduction problem for the non-linear heat equation which appears in some applied subjects. The problem is severely ill-posed. Using some modified regularization method, we establish a regularized solution which gives error estimate of Holder type for all t is an element of [0, T]. Some numerical examples show that the computational effect of these methods are all satisfactory. Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/29312   Title:  Holder stability for a class of initial inverse nonlinear heat problem in multiple dimension Authors:  Nguyen, Huy Tuan Bui, Thanh Duy Nguyen, Dang Minh Vo, Anh Khoa) Keywords:  Backward heat problem;Nonlinearly ill-posed problem;Quasi-boundary value methods;Quasi-reversibility methods Issue Date:  2015 Publisher:  ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS Citation:...

Nguyen, Van Hieu We use the Logunov-Tavkhelidze quasipotential approach to study some processes of quantum chromo-dynamics at finite densities and temperatures. The dynamic equation for the color superconductivity is derived. We discuss the spontaneous breaking of the chiral, flavor, and color symmetries and also the possibility of constructing a field theory of the composite three-quark systems. Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/31416   Title:  Quasipotential approach to quantum chromodynamics Authors:  Nguyen, Van Hieu Keywords:  Flavor symmetry;Three-quark systems;quantum chromodynamics;Color symmetry;Chiral symmetry Issue Date:  2002 Publisher:  CONSULTANTS BUREAU, 233 SPRING ST, NEW YORK, NY 10013 USA Citation:  ISIKNOWLEDGE Description:  THEORETICAL AND MATHEMATICAL PHYSICS Volume: 132 Issue: 2 Pages: 1144-1147 ; TNS06516 URI:  http://repository.vnu.edu.vn/handle/VNU_123...

N.D. The N. Chau N.V. Vuong N.H. Quyen The formation of special nanostructure, cellular structure, in Nd4.5Fe73.8B18.5Cr0.5Co1.5Nb1Cu0.2 nanocomposite magnet has been observed by means of SEM for the first time. Ultrafine structure of cellules with thickness of 20-25 nm and length in range of 200-300 nm leads to high shape anisotropy of the materials. Therefore, high hard magnetic properties were obtained with (BH)(max) up to 17.3 MG Oe in ribbons with very high remanence of 13.5 kG. The role of Cr and Co in the formation and refinement of cellular structure is proposed. Effect of heat treatment on hard magnetic properties is discussed in detail.   Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/31661 Title:  High hard magnetic properties and cellular structure of nanocomposite magnet Nd4.5Fe73.8B18.5Cr0.5Co1.5Nb1Cu0.2 Authors:  N.D. The N. Chau N.V. Vuong N.H. Quyen Keywords:  Amorphous alloys;Nanocrystalline alloys;Ex...