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COBORDISM CLASSES OF fiberingS OVER PRODUCT OF PROJECTIVE SPACES

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Acta Mathematica Scientia 2009年第5期29卷 1421-1429页

作者：王彦英李京艳 College of Mathematics and Information Science Hebei Normal University Department of Mathematics and Physics Shijiazhuang Railway Institute

Let RP（k） denote the k-dimensional real projective space. This article determines which cobordism classes are represented by the total space of a fibering with prescribed base space RP（3）× RP（1）, RP（2） × RP... 详细信息

关键词： fibering characteristic number cobordism class

Multiple Solutions for a Class of Concave-Convex Quasilinear Elliptic Systems with Nonlinear Boundary Condition

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Applied Mathematics 2013年第3期4卷 449-455页

作者： Li Wang East China Jiaotong University Nanchang China

In this paper, a quasilinear elliptic system is investigated, which involves concave-convex nonlinearities and nonlinear boundary condition. By Nehari manifold, fibering method and analytic techniques, the existence o... 详细信息

关键词： Multiple Solutions Quasilinear Elliptic Systems Nehari Manifold fibering Method

Status and development of mineral wool made from molten blast furnace slag

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Baosteel Technical Research 2011年第2期5卷 3-8页

作者： XIAO Yongli LIU Yin LI Yongqian Ironmaking Resources ＆ Environment Division Research Institute Baosteel Iron ＆ Steel Co. Ltd. Shanghai 201900 China

This study describes the characteristics of mineral wool and its applications,and also introduces the traditional process of mineral wool made from molten blast furnace （BF） slag. Compared with high energy consumption of the traditional process,the production of mineral wool by using molten BF slag will be able to take full advantage of the sensible heat of molten slag, and also reduce production costs. However, there are also further issues to resolve such as how to obtain the required amount of molten BF slag and how to make it homogeneous. Based on the physical and chemical properties of the molten BF slag,the investigation into the relationship between temperature and viscosity under different acidity coefficients of the slag and silicon mixture was conducted. Combined with the crystallization and phase diagram of slag wool, its heat resistance, water resistance, durability and corrosion resistance were analyzed. Finally, trends of the technology development are proposed.

关键词： mineral wool molten blast furnace (BF) slag fibering characteristics

On Cobordism Classes of Fiber Bundles

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Journal of Mathematical Research and Exposition 2002年第2期22卷 219-222页

作者：王彦英孟召静河北师范大学数学系河北石家庄050016

In this paper we deal with some properties of cobordism classes of fiberbundles over the real projective space.

关键词： cobordism classes fibering Stiefel-Whitney classes.

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Preface

Baosteel Technical Research 2011年第1期5卷 5-6页

作者： Dr. ZHANG Junbao Senior Scientist of Advanced Technology Division Research Institute Baoshan Iron ＆ Steel Co. Ltd.

In the mid-1980s, scientist A. Papyrin and his colleagues from the Institute of Theoretical and Applied Mechanics, the Russian Academic of Science in Novosibirsk, discovered some metal particles on the tunnel wall ,when they conducted wind tunnel experiments. The adhesion was not simple mechanical riveting, but they contained metallurgical bonding to some degree, and the bonding strength was very high.

关键词： mineral wool molten blast furnace(BF) slag fibering characteristics