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扩展有限元法(XFEM)是目前裂纹分析的主流数值方法。2009年起,ABAQUS、ANSYS等主流商业软件集成XFEM并应用于裂纹问题,标志着该方法被工业界广泛接受。然而,在实际应用中XFEM仍然受到两方面的困扰:总体方程高度病态和动力学计算时能量难以守恒。基于“困难的根源在于单位分解插值引入的额外自由度”这一判断和认识,我们提出了一种无额外自由度的改进型扩展有限元方法,有效解决了现有方法总体刚度...
The stability of dark solitons generated by a supersonic flow of a Bose-Einstein condensate past a concave corner (or a wedge) is studied. It is shown that solitons in the dispersive shock wave genera...
The moduli spaceMg,k of Riemann surfaces of genus g with k punctures plays an important role in many area of mathematics and theoretical physics.In this article we first survey some of our recent work...
Crop Development Model     mathematical Model  growth       2009/2/6
Crop Development Model
Quasi-fixed inputs are incorporated into dynamic DEA, A unique feature of the quasi-fixed inputs is that those are considered as outputs at the current, while being treated as inputs at the next perio...
Software development is a multistage process. Minimizing the project duration and minimizing the project cost are two objectives of software projects. These two goals are often in conflict with each o...
In this paper, we generalize an open problem posed by Ngô et al. in [Notes on an Integral Inequality, JIPAM, 7(4)(2006), Art. 120] and give some answers which extend the results of Boukerrioua...
In this paper, we generalize an open problem posed by Q. A. Ngô et al. in the paper Notes on an Integral Inequality, J. Inequal. in Pure and Appl. Math., 7(4)(2006), Art. 120 and give an affirma...
We give some further answers to the open problem posed in the article [Feng Qi, Several integral inequalities, J. Inequal. Pure and Appl. Math., 1(2) (2000), Art. 19.] Being Qi's inequality of moment ...

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