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The Problems of Inaccuracy in Flow Capacity Definition by Using Different Numerical Techniques

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Journal of Thermal Science 2004年第1期13卷 1-7页

作者： I.V.Afanasiev A.V.Granovski A.M.Kareline M.K.Kostege ALSTOM POWER Uniturbo Ltd.13 Kasatkina St. 129301MoscowRussiaALSTOM POWER Uniturbo Ltd.13 Kasatkina St.129301MoscowRussiaALSTOM POWER Uniturbo Ltd.13 Kasatkina St.129301MoscowRussiaALSTOM POWER Uniturbo Ltd.13 Kasatkina St.129301MoscowRussia

The results of numerical analysis of turbine flow capacity and other parameters at different turbine rows are presented in this paper. Mass flow calculations by 3D Euler code.has been controlled by means of 3D Navier-Stokes code.taking into account inlet turbulence intensity and turbulence scale. The use of complicated numerical approaches (3D Euler or 3D Navier-Stokes code.) for mass flow definition demands close attention to quality of numerical techniques. Various reasons of inaccuracy of mass flow definition by using different 3D numerical approaches are analyzed.

关键词： flow capacity computing accuracy 3D Euler code 3D Navier-Stokes code.

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(r,k)-catching code

Chinese Science Bulletin 1998年第10期43卷 812-815页

作者： LI Anping Institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, China Institute of Applied Mathematics Chinese Academy of Sciences Beijing China

A collection of r_words on an alphabet of n letters is called (r,k)_catching code.if for every r_word w there is one selected member v such that v coincides with w in at least k places. How large is the smallest size of the (r,k)_catching code.and how to find the minimal (r,k)_\%catching code. Some methods are advanced to construct such code..

关键词： catching code.

Error-detecting abilities of binary nonlinear constant weight code.

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Chinese Science Bulletin 1997年第4期42卷 347-350页

作者： Fu, FW Xia, ST Department of Mathematics Nankai University Tianjin China

CONSTANT weight code. are very important in coding theory for its application to communication. In refs. [1—5], the undetected error probabilities (UEP)of binary nonlinear constant weight code. (BNCW) were studied, and Wang et al. showed that when n>8, BNCW code. (n, 2, ω) were not proper, Wang proposed a conjecture that when n>4δ and δ> 1, BNCW code. (n, 2δ, ω) are not proper. in this note, the error-detecting abilities

关键词： nonlinear constant weight code optimum constant weight code.

STUDY ON THE MODULARIZATION BUILDING AND IMPLEMENTATION OF SMALL AND MEDIUM-SIZED ENTERPRISES’ VIRTUAL ORGANIZATION

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STUDY ON THE MODULARIZATION BUILDING AND IMPLEMENTATION OF S...