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Tie Jun,Jinzhi Wang,Enmin Feng 한국전산응용수학회 2008 Journal of applied mathematics & informatics Vol.26 No.1
This paper is motivated by the problem of fitting a group of cuboids into a simplified rotating vessel of the artificial satellite. Here we introduce a combinatorial optimization model which reduces the threedimensional layout problem with behavioral constraints to a finite enumeration scheme. Moreover, a global combinatorial optimization algorithm is described in detail, which is an improved graph-theoretic heuristic. This paper is motivated by the problem of fitting a group of cuboids into a simplified rotating vessel of the artificial satellite. Here we introduce a combinatorial optimization model which reduces the threedimensional layout problem with behavioral constraints to a finite enumeration scheme. Moreover, a global combinatorial optimization algorithm is described in detail, which is an improved graph-theoretic heuristic.
Tie Jun Wang,Chen Guang Wang,Tie Jun Wang,Yan Gao,Chuang Zhi Wu,Long Long Ma 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.4
With naphthalene as biomass tar model compound, partial oxidation reforming (with addition of O2) and dry reforming of biomass fuel gas were investigated over nickel-based monoliths at the same conditions. The results showed that both processes had excellent performance in upgrading biomass raw fuel gas. Above 99% of naphthalene was converted into synthesis gases (H2+CO). About 2.8 wt% of coke deposition was detected on the catalyst surface for dry reforming process at 750 oC during 108 h lifetime test. However, no coke deposition was detected for partial oxidation reforming process, which indicated that addition of O2 can effectively prohibit the coke formation. O2 can also increase the CH4 conversion and H2/CO ratio of the producer gas. The average conversion of CH4 in dry and partial oxidation reforming process was 92% and 95%, respectively. The average H2/CO ratio increased from 0.95 to 1.1 with the addition of O2, which was suitable to be used as synthesis gas for dimethyl ether (DME) synthesis.
Jun, Tie,Wang, Jinzhi,Feng, Enmin Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.1
This paper is motivated by the problem of fitting a group of cuboids into a simplified rotating vessel of the artificial satellite. Here we introduce a combinatorial optimization model which reduces the three-dimensional layout problem with behavioral constraints to a finite enumeration scheme. Moreover, a global combinatorial optimization algorithm is described in detail, which is an improved graph-theoretic heuristic.
Jun, Tie,Feng, Enmin 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.15 No.1
In this paper we study the problem of three-dimensional layout optimization on the simplified rotating vessel of satellite. The layout optimization model with behavioral constraints is established and some effective and convenient conditions of performance optimization are presented. Moreover, we prove that the performance objective function is locally Lipschitz continuous and the results on the relations between the local optimal solution and the global optimal solution are derived.
Tie Jun,Enmin Feng 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.15 No.-
In this paper we study the problem of three-dimensional lay-out optimization on the simplied rotating vessel of satellite. The layoutoptimization model with behavioral constraints is established and someeective and convenient conditions of performance optimization are pre-sented. Moreover, we prove that the performance objective function islocally Lipschitz continuous and the results on the relations between thelocal optimal solution and the global optimal solution are derived.
Counterweight optimization of an asymmetrical hybrid machine tool based on dynamic isotropy
Jun Wu,Tie-Min Li,Liping Wang 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.7
This paper deals with the counterweight optimization of an asymmetrical hybrid machine tool based on dynamic isotropy. The dynamic model is derived and the dynamic manipulability ellipsoid is studied. Based on dynamic manipulability ellipsoid, the dynamic isotropy is defined. Counterweight block and fluid counterweight are presented to balance the weight of moving parts. The mass of the counterweight block is optimized to obtain the maximum dynamic isotropy in the workspace. The dynamic isotropy of the machine tool after counterweight optimization is compared with that before counterweight optimization. Furthermore, the dynamic isotropy of the machine tool with fluid counterweight is investigated and compared with that of the machine tool with counterweight block.
Viscosity methods of approximation for a common solution of a finite family of accretive operators
Jun-Min Chen,Li-Juan Zhang,Tie-Gang Fan 영남수학회 2011 East Asian mathematical journal Vol.27 No.1
In this paper, we try to extend the viscosity approximation technique to find a particular common zero of a finite family of accretive mappings in a Banach space which is strictly convex reflexive and has a weakly sequentially continuous duality mapping. The explicit viscosity approximation scheme is proposed and its strong convergence to a solution of a variational inequality is proved.