Giải pháp hoàn thiện chiến lược kinh doanh ở công ty cổ phần giải pháp và dịch vụ phần mềm Nam Việt : Luận văn ThS. Quản trị Kinh doanh : 60 34 05

Ngày nay trong nền kinh tế thị trường tự do cạnh tranh, cùng với xu hướng phát triển của nền kinh tế toàn cầu, nền kinh tế Việt Nam cũng đang trên đà phát triển mạnh mẽ. Nhưng trong bối cảnh kinh tế như vậy môi trường kinh doanh thay đổi, biến động rất nhanh làm cho các doanh nghiệp Việt Nam nói riêng và trên thế giới nói chung luôn có sự cạnh tranh gay gắt, quyết liệt để tồn tại và phát triển. Bởi vậy khi môi trường kinh doanh trở nên phức tạp, muốn tồn tại và phát triển bền vững, thì mỗi doanh nghiệp luôn phụ thuộc rất lớn vào hiệu quả của lãnh đạo, cũng như những định hướng, chiến lược kinh doanh của mình. Vì vậy

đối với mọi doanh nghiệp, lập kế hoạch hoạt động có ý nghĩa đặc biệt quan trọng, nó là chức năng đầu tiên trong hệ thống chức năng quản lý. Trong điều kiện cạnh tranh gay gắt, người lập kế hoạch của mỗi doanh nghiệp phải tính đến nhiều yếu tố khách quan bên ngoài và chủ quan bên trong doanh nghiệp, phân tích có hệ thống thông tin để làm căn cứ hoạch định hoạt động của doanh nghiệp trong dài hạn và ngắn hạn, sao cho kế hoạch lập ra có hiệu quả nhất.Trong nền kinh tế thị trường có tính cạnh tranh gay gắt, một doanh nghiệp muốn thành công phải có chiến lƣợc, nhà lãnh đạo doanh nghiệp phải nắm được xu thế thay đổi

trên thị trường, tìm ra được nhân tố then chốt cho thành công, biết khai thác những lợi thế của doanh nghiệp, hiểu đƣợc điểm yếu của doanh nghiệp, hiểu đƣợc đối thủ cạnh tranh, mong muốn của khách hàng, biết cách tiếp cận với thị trường.

 

http://repository.vnu.edu.vn/handle/VNU_123/47436

COMPUTATION OF LIMIT LOAD USING EDGE-BASED SMOOTHED FINITE ELEMENT METHOD AND SECOND-ORDER CONE PROGRAMMING

This paper presents a novel numerical procedure for limit analysis of plane problems using edge-based smoothed finite element method (ES-FEM) in combination with second-order cone programming. In the ES-FEM, the discrete weak form is obtained based on the strain smoothing technique over smoothing domains associated with the edges of the elements. Using constant smoothing functions, the incompressibility condition only needs to be enforced at one point in each smoothing domain, and only one Gaussian point is required, ensuring that the size of the resulting optimization problem is kept to a minimum. The discretization problem is transformed into the form of a second-order cone programming problem which can be solved using highly efficient interior-point solvers. Finally, the efficacy of the procedure is demonstrated by applying it to various benchmark plane stress and strain problems.

http://www.worldscientific.com/doi/abs/10.1142/S0219876213400045
http://repository.vnu.edu.vn/handle/VNU_123/32856

FREE AND FORCED VIBRATION ANALYSIS USING THE n-SIDED POLYGONAL CELL-BASED SMOOTHED FINITE ELEMENT METHOD (nCS-FEM)

An-sided polygonal cell-based smoothed finite element method (nCS-FEM) was recently proposed to analyze the elastic solid mechanics problems, in which the problem domain can be discretized by a set of polygons with an arbitrary number of sides. In this paper, the nCS-FEM is further extended to the free and forced vibration analyses of two-dimensional (2D) dynamic problems. A simple lump mass matrix is proposed and hence the complicated integrations related to computing the consistent mass matrix can be avoided in thenCS-FEM. Several numerical examples are investigated and the results found of the nCS-FEM agree well with exact solutions and with those of others FEM.

http://www.worldscientific.com/doi/abs/10.1142/S0219876213400082
http://repository.vnu.edu.vn/handle/VNU_123/32857

AN APPLICATION OF THE ES-FEM IN SOLID DOMAIN FOR DYNAMIC ANALYSIS OF 2D FLUID-SOLID INTERACTION PROBLEMS

An edge-based smoothed finite element method (ES-FEM-T3) using triangular elements was recently proposed to improve the accuracy and convergence rate of the existing standard finite element method (FEM) for the solid mechanics analyses. In this paper, the ES-FEM-T3 is further extended to the dynamic analysis of 2D fluid–solid interac-tion problems based on the pressure-displacement formulation. In the present coupled method, both solid and fluid domain is discretized by triangular elements. In the fluid domain, the standard FEM is used, while in the solid domain, we use the ES-FEM-T3 in which the gradient smoothing technique based on the smoothing domains associated with the edges of triangles is used to smooth the gradient of displacement. This gradi-ent smoothing technique can provide proper softening effect, and thus improve signifi-cantly the solution of coupled system. Some numerical examples have been presented to illustrate the effectiveness of the proposed coupled method compared with some existing methods for 2D fluid–solid interaction problems.

http://repository.vnu.edu.vn/handle/VNU_123/32859

First evidence for the annihilation decay mode B+ -> D-s(+)phi

Evidence for the hadronic annihilation decay mode B + ! D + s is found with greater than 3 signi cance. The branching fraction and CP asymmetry are measured to be B(B + ! D + s ) = 1:87 +1:25 0:73 (stat) 0:19 (syst) 0:32 (norm) 10 6 ; ACP (B + ! D + s ) = 0:01 0:41 (stat) 0:03 (syst): The last uncertainty on B(B + ! D + s ) is from the branching fractions of the B + ! D + s D 0 normalization mode and intermediate resonance decays. Upper limits are also set for the branching fractions of the related decay modes B + (c) ! D + (s) K 0 , B + (c) ! D + (s) K 0 and B + c ! D + s , including the result B(B + ! D + K 0 ) < 1:8 10 6 at the 90% credibility level.

http://repository.vnu.edu.vn/handle/VNU_123/32861

BTEX pollution caused by motorcycles in the megacity of HoChiMinh

Monitoring of benzene, toluene and xylenes (BTEX) was conducted along with traffic counts at 17 roadside sites in urban areas of HoChiMinh. Toluene was the most abundant substance, followed byp,m-xylenes, benzene,o-xylene and ethylbenzene. The maximum observed hour-average benzene concentration was 254μg/m3 . Motorcycles contributed to 91% of the traffic fleet. High correlations among BTEX species, between BTEX concentrations and the volume of on-road motorcycles, and between inter-species ratios in air and in gasoline indicate the motorcycle-exhaust origin of BTEX species. Daily concentrations of benzene, toluene, ethylbenzene, p,m-xylenes ando-xylene were 56, 121, 21, 64 and 23μg/m3 , respectively. p,m-xylenes possess the highest ozone formation potential among the BTEX family

http://www.sciencedirect.com/science/article/pii/S100107421260045X
http://repository.vnu.edu.vn/handle/VNU_123/32862

Identity in activity: Examining teacher professional identity formation in the paired-placement of student teachers

This paper examines the evolution of the professional identities of student teachers (STs) in a paired-placement teaching practicum in Vietnam. The study draws on activity theory, its notion of contradic-tion, and Vygotsky’s concepts of ZPD and perezhivanie, to identify the factors driving the intricate learning process. Opportunities for learning were initially manifested in conflicts within the teacher pair, for example negotiation of their multiple identities, as friends, students and teachers in training. However, within the framework of planned and supervised collaboration, the STs resolved most of their conflicts constructively and experienced qualitative development in their teaching identities


http://repository.vnu.edu.vn/handle/VNU_123/32872