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Negatively bounded solutions for a parabolic partial differential equation
Zhong Bo Fang,곽민규 대한수학회 2005 대한수학회보 Vol.42 No.4
In this note, we introduce a new proof of the uniqueness and existence of a negatively bounded solution for a parabolic partial differential equation. The uniqueness in particular implies the finiteness of the Fourier spanning dimension of the global attractor and the existence allows a construction of an inertial manifold.
LIOUVILLE THEOREMS OF SLOW DIFFUSION DIFFERENTIAL INEQUALITIES WITH VARIABLE COEFFICIENTS IN CONE
ZHONG BO FANG,CHAO FU,LINJIE ZHANG 한국산업응용수학회 2011 Journal of the Korean Society for Industrial and A Vol.15 No.1
We here investigate the Liouville type theorems of slow diffusion differential inequality and its coupled system with variable coefficients in cone. First, we give the definition of global weak solution, and then we establish the universal estimate ( does not depend on the initial value ) of solution by constructing test function. At last, we obtain the nonexistence of non-negative non-trivial global weak solution within the appropriate critical exponent. The main feature of this method is that we need not use comparison theorem or the maximum principle.
Nonlocal Formulation for Numerical Analysis of Post-Blast Behavior of RC Columns
Zhong-Xian Li,Bo Zhong,Yanchao Shi,Jia-Bao Yan 한국콘크리트학회 2017 International Journal of Concrete Structures and M Vol.11 No.2
Residual axial capacity from numerical analysis was widely used as a critical indicator for damage assessment of reinforced concrete (RC) columns subjected to blast loads. However, the convergence of the numerical result was generally based on the displacement response, which might not necessarily generate the correct post-blast results in case that the strain softening behavior of concrete was considered. In this paper, two widely used concrete models are adopted for post-blast analysis of a RC column under blast loading, while the calculated results show a pathological mesh size dependence even though the displacement response is converged. As a consequence, a nonlocal integral formulation is implemented in a concrete damage model to ensure mesh size independent objectivity of the local and global responses. Two numerical examples, one to a RC column with strain softening response and the other one to a RC column with post-blast response, are conducted by the nonlocal damage model, and the results indicate that both the two cases obtain objective response in the post-peak stage.
A NONLINEAR LIOUVILLE THEOREM IN HALF SPACE
ZHONG BO FANG,MINKYU KWAK 한국산업응용수학회 2006 Journal of the Korean Society for Industrial and A Vol.10 No.1
We prove a Liouville theorem of a semilinear elliptic equation: △u+f(xn, u)=0 defined in half space with zero boundary data, here n>2, f satisfies suitable conditions. In fact we show that if u is a nonnegative classical solution, then u becomes identically zero. The result was proved by using the moving plane method and by investigating an ordinary differential equation.
Effects of Taxi-Booking Apps of E-Service Quality on Use Intention in China
Zhong-Bo, Guo,Uk-Yeol Park,Jong-Ho Lee 한국유통과학회 2018 The Journal of Industrial Distribution & Business( Vol.9 No.4
Purpose - The purpose of this article is to examine the effects of perceived value, satisfaction, and continued use intention of e-service Quality of taxi-booking apps. Research design, data, and methodology - The questionnaire was created to examine every relevant variables to practical and theoretical implications. The pilot survey was conducted for 15 days from April 7th to April 21st in 2016. Their total numbers were 354 surveys. But 330 copies were used for the analysis except 24 of them. To make a more effective analysis, several analysis tools and analysis programmes were used, such as IBM SPSS and AMOS. Results - The results are as follows. First, all variables of e-service quality except safety make influences on perceived value. Second, e-service quality except safety makes influences on satisfaction. Third, perceived value makes influence on satisfaction and on intention of continued use. Fourth, satisfaction makes influence on intention of continued use. Conclusions - First, 5 variables are very limited. more valuable variables are need to test with this model. Second, this study was conducted only in China. So there may be possible to the representatives. To use this model for better analysis and application abroad, more characteristics and strategic factors should be considered like the local culture of a particular country, attributes for different environment etc.
A VERY SINGULAR SOLUTION OF A DOUBLY DEGENERATE PARABOLIC EQUATION WITH NONLINEAR CONVECTION
Zhong Bo Fang 대한수학회 2010 대한수학회지 Vol.47 No.4
We here investigate an existence and uniqueness of the nontrivial,nonnegative solution of a nonlinear ordinary differential equation:[수식]satisfying a specific decay rate: [수식]. Here [수식]. Such a solution arises naturally when we study a very singular solution for a doubly degenerate equation with nonlinear convection:[수식]defined on the half line.
An Exploratory Study on the Key Variables of the Characteristics of Taxi-Calling Apps
Zhong bo Guo,Jong Ho Lee 한국유통과학회 2016 KODISA ICBE (International Conference on Business Vol.2016 No.-
Within the 21st century, life has so much changes amazingly. Our lives had become better than before, unprecedently marching towards the betterment of society as new creation meets innovation, sparking a new experience. Unvaried to other elements in life, the development of technology had impacted and redefined how business runs, raging more profits than ever before, yet skyrocketing the sales figures to new records. The purpose of this article is to examine the key factors of the characteristics of taxi-calling apps because of insufficient researches on them with development of high technologies and wide-spread smartphones' apps all over the world. And even more it is considered to have useful skills on smartphones' apps. They will make diversified influences on human lives. Also to have knowledge and skill on them is considered as a kind of competition edge.