Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, China and 4 samples from the coal preparation plant of this mine, the distribution...Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, China and 4 samples from the coal preparation plant of this mine, the distribution of the elements in the seam profile, their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied. The conclusions are drawn as follows. The coal-forming environment was probably invaded by sea water during the post-stage of peatification, which results in the fact that the contents of As, Fe, S, etc. associated closely with sea water tend to increase toward the top of the seam, and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof. These elements studied are dominantly associated with kaolinite, pyrite, illite, montmorillonite, etc., of which the As, Pb, Mn, Cs, Co, Ni, etc. are mainly associated with sulfides, the Mo, V, Nb, Hf, REEs, Ta etc. mainly with kaolintie, the Mg, Al etc. mainly with epigenetic montmorillonite, and the Rb, Cr, Ba, Cu, K, Hg, etc. mainly with epigenetic illite. The physical coal cleaning is not only effective in the removal of ash and sulfur, but also in reducing the concentra-tion of most major and trace elements. The elements Be, U, Sb, W, Br, Se, P, etc. are largely or partly organically bound showing a relatively low removability, while the removability of the other elements studied is more than 20%, of which the Mg, Mn, Hg, Fe, As, K, Al, Cs, and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash. The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.展开更多
On Equivalence of Simple Closed Curves in Flat Surfaces Zong Liang SUN Abstract By explicit constructions,we give direct proofs of the following results:for any distinct homotopy classes of simple closed curvesαandβ...On Equivalence of Simple Closed Curves in Flat Surfaces Zong Liang SUN Abstract By explicit constructions,we give direct proofs of the following results:for any distinct homotopy classes of simple closed curvesαandβin a closed surface of genus g】1,there exist a hyperbolic structure X and a holomorphic quadratic differential q on X such展开更多
On Relations of Vector Optimization Results with C^(1,1) Data Dusan BEDNARIK Karel PASTOR Abstract In this article we prove that some of the sufficient and necessary optimality conditions obtained by Ginchev,Guerraggi...On Relations of Vector Optimization Results with C^(1,1) Data Dusan BEDNARIK Karel PASTOR Abstract In this article we prove that some of the sufficient and necessary optimality conditions obtained by Ginchev,Guerraggio,Luc[Appl.Math.,51,5-36(2006)]generalize (strictly) those presented by Guerraggio,Luc[J.Optim.Theory Appl.,109,615-629(2001)]. While the former paper shows examples for which the conditions given there are effective but the ones from the latter paper fail,it does not prove that generally the conditions it proposes are stronger.In the present note we complete this comparison with the lacking proof.展开更多
SOME BASIC CONCEPTS IN MODERN DESIGN THEORY XIE Youbai(1.School of Mechanical Engineering,Shanghai Jiaotong University, Shanghai 200030,China; 2.School of Mechanical Engineering,Xi’an Jiaotong University, Xi’an 7100...SOME BASIC CONCEPTS IN MODERN DESIGN THEORY XIE Youbai(1.School of Mechanical Engineering,Shanghai Jiaotong University, Shanghai 200030,China; 2.School of Mechanical Engineering,Xi’an Jiaotong University, Xi’an 710049,China) Abstract:In the long march of development of design theories,many terms have been coined for explaining their new ideas.Some times one term is used by different authors with different definitions or different means,say concepts. Other times different terms are used by different authors with the same mean or concept.It is rational and necessary for the modem design theory in the展开更多
文摘Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, China and 4 samples from the coal preparation plant of this mine, the distribution of the elements in the seam profile, their geo-chemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied. The conclusions are drawn as follows. The coal-forming environment was probably invaded by sea water during the post-stage of peatification, which results in the fact that the contents of As, Fe, S, etc. associated closely with sea water tend to increase toward the top of the seam, and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof. These elements studied are dominantly associated with kaolinite, pyrite, illite, montmorillonite, etc., of which the As, Pb, Mn, Cs, Co, Ni, etc. are mainly associated with sulfides, the Mo, V, Nb, Hf, REEs, Ta etc. mainly with kaolintie, the Mg, Al etc. mainly with epigenetic montmorillonite, and the Rb, Cr, Ba, Cu, K, Hg, etc. mainly with epigenetic illite. The physical coal cleaning is not only effective in the removal of ash and sulfur, but also in reducing the concentra-tion of most major and trace elements. The elements Be, U, Sb, W, Br, Se, P, etc. are largely or partly organically bound showing a relatively low removability, while the removability of the other elements studied is more than 20%, of which the Mg, Mn, Hg, Fe, As, K, Al, Cs, and Cr associ-ated mostly with the coarser or epigenetic minerals show a higher removability than that of ash. The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes.
文摘On Equivalence of Simple Closed Curves in Flat Surfaces Zong Liang SUN Abstract By explicit constructions,we give direct proofs of the following results:for any distinct homotopy classes of simple closed curvesαandβin a closed surface of genus g】1,there exist a hyperbolic structure X and a holomorphic quadratic differential q on X such
文摘On Relations of Vector Optimization Results with C^(1,1) Data Dusan BEDNARIK Karel PASTOR Abstract In this article we prove that some of the sufficient and necessary optimality conditions obtained by Ginchev,Guerraggio,Luc[Appl.Math.,51,5-36(2006)]generalize (strictly) those presented by Guerraggio,Luc[J.Optim.Theory Appl.,109,615-629(2001)]. While the former paper shows examples for which the conditions given there are effective but the ones from the latter paper fail,it does not prove that generally the conditions it proposes are stronger.In the present note we complete this comparison with the lacking proof.
文摘SOME BASIC CONCEPTS IN MODERN DESIGN THEORY XIE Youbai(1.School of Mechanical Engineering,Shanghai Jiaotong University, Shanghai 200030,China; 2.School of Mechanical Engineering,Xi’an Jiaotong University, Xi’an 710049,China) Abstract:In the long march of development of design theories,many terms have been coined for explaining their new ideas.Some times one term is used by different authors with different definitions or different means,say concepts. Other times different terms are used by different authors with the same mean or concept.It is rational and necessary for the modem design theory in the
