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1488 Total, 149 Pages | << First < Previous 140 141 142 143 144 145 146 Next > Last >>

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	1. Dipolar Cycloaddition of aphosphorylnitrile Oxide to Vinylphosphonate and Phosphaalyne
	Luo Yong ,Wang Wenhu,Tian Li ,Ye Yong ,Liu Lunzu
	Mathematics 22 November 2004
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	Abstract:Dipolar cycloaddition of (diisopropoxyphosphoryl) nitrile oxide with vinylphosphonate leads to the formation of isoxazoles bearing two or three phosphoryl groups, and with phosphaalkyne provides a phosphabiisoxazole bearing two phosphoryl groups.
	TO cite this article:Luo Yong ,Wang Wenhu,Tian Li , et al. Dipolar Cycloaddition of aphosphorylnitrile Oxide to Vinylphosphonate and Phosphaalyne[OL].[22 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1266


	2. [M(phen)(e,a-cis-1,4-chdc)(H2O)]n(M = Mn and Cu; phen = 1,10-phenanthroline; chdc = 1,4-cyclohexanedicarboxylate)
	Wang Chunxiu ,Hu Changwen ,Li Hui,Niu Xueli,Pan Wanlong,Gong Yun
	Mathematics 10 November 2004
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	Abstract:Two new coordination polymers, [M(phen)(e,a-cis-1,4-chdc)(H2O)]n (1, M = Mn; 2, M = Cu; chdc = 1,4-cyclohexanedicarboxylic acid; phen = 1,10-phenanthroline), were prepared under hydrothermal conditions and characterized by IR spectra and single crystal X-ray diffraction analysis. X-ray crystal structural analyses reveal that 1 and 2 are isomorphic and belong to the monoclinic system. C20H20MnN2O5, P2(1)/c, a = 10.235(2) Å, b = 8.9134(19) Å, c = 20.466(4) Å, b = 99.820(3)°, Z = 4 for 1; and C20H20CuN2O5, P21/c, a = 10.002(3) Å, b = 8.949(2) Å, c = 20.270(5) Å, b = 99.694(3)° Z = 4 for 2. In the structures of 1 and 2, the 1,4-chdc ligand possesses only one kind of e,a-cis conformation although there are both cis- and trans-conformations in the raw material.
	TO cite this article:Wang Chunxiu ,Hu Changwen ,Li Hui, et al. [M(phen)(e,a-cis-1,4-chdc)(H2O)]n(M = Mn and Cu; phen = 1,10-phenanthroline; chdc = 1,4-cyclohexanedicarboxylate)[OL].[10 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1231

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	3. Parameters Analysis of a Coaxial-Waveguide Cyclotron Autoresonance Maser (CARM) Amplifier
	zhang huibo,zhang shichang,qiu chunrong,Jin Jianbo
	Mathematics 09 November 2004
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	Abstract:Nonlinear simulations demonstrate the possibility for a coaxial-waveguide cyclotron autoresonance maser (CARM) amplifier to operate at frequency of 140 GHz in hundreds watts with ultrahigh gain of 68 dB. Careful design of the operating magnetic field is of importance to the power of the device, although the other initial parameters such as electron-beam radius and voltage affect the power, too. Like a cylindrical-waveguide CARM, a coaxial-waveguide CARM amplifier is sensitive on the velocity spreads of the electron beam
	TO cite this article:zhang huibo,zhang shichang,qiu chunrong, et al. Parameters Analysis of a Coaxial-Waveguide Cyclotron Autoresonance Maser (CARM) Amplifier[OL].[ 9 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1226


	4. Preparation and Cyclization of 4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene- 2,2-dioxide
	Li Tian,Lunzu Liu
	Mathematics 08 November 2004
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	Abstract:Chloroformylation of 5,5-dimethyl-1,2-oxathiolan-4-one 2,2-dioxide 4 with Vilsmeier reagent (DMF/POCl3) led to the formation of cyclic b-chlorovinylaldehyde (4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene 2,2-dioxide 5). Compound 5 reacted with formamidine, o-amino-phenol, phthalamine, amino-pyrazole and amino-tetrazole to give the corresponding heterocyclic compounds.
	TO cite this article:Li Tian,Lunzu Liu. Preparation and Cyclization of 4-chloro-5,5-dimethyl-3-formyl-1,2-oxathiolene- 2,2-dioxide [OL].[ 8 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1222


	5. On the Relations between Players in Games
	Jia-wei Li
	Mathematics 03 November 2004
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	Abstract:The relations between players have a great influence on how a player chooses his strategy in games. By using numerical values denoting the relations between players a novel game model was put forward in this study. A player will choose strategy on the basis of his subjective payoffs, which can be calculated from the new game model. Either of cooperative or non-cooperative games are specific cases of it. A new type of games called hostile game as well as how relations between players reflect one’s attitude to others was studied. A good case in point is prisoners’ dilemma, which is analyzed in terms of the new method.
	TO cite this article:Jia-wei Li. On the Relations between Players in Games[OL].[ 3 November 2004] http://en.paper.edu.cn/en_releasepaper/content/1200


	6. Boundedness of some maximal commutators in Hardy-type spaces with non-doubling measures
	Guoen Hu,Yan Meng,Dachun Yang
	Mathematics 28 October 2004
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	Abstract:Let μ be a non-negative Radon measure on Rd which only satisfies some growth condition. Under this assumption, the boundedness in some Hardy-type spaces are established or a class of maximal Calderon-Zygmund operators and maximal commutators which are variant of the usual maximal commutators generated by Calderon-Zygmund operators and RBMO(μ) functions, where the Hardy-type spaces are some appropriate subspaces, associated with the considered RBMO(μ) functions, of the Hardy space H1(μ) of Tolsa.
	TO cite this article:Guoen Hu,Yan Meng,Dachun Yang. Boundedness of some maximal commutators in Hardy-type spaces with non-doubling measures[OL].[28 October 2004] http://en.paper.edu.cn/en_releasepaper/content/1174


	7. On cheap talk in games
	Jia-wei Li
	Mathematics 22 October 2004
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	Abstract:It has been proved in many studies that cheap talk has great influence on the players’ choices of strategies in games. But the effect of cheap talk has still not been properly evaluated in game theory. Based on a novel game model with parameters denoting how one player cares for the other’s payoff, we can take the relations between players into account in games and extend the use of games theory. In this study the effect of cheap talk was analyzed by using the new game model. Two examples – a modified prisoners’ dilemma and threatening letter – were studied to explain how cheap talk could greatly influence the results of games.
	TO cite this article:Jia-wei Li. On cheap talk in games[OL].[22 October 2004] http://en.paper.edu.cn/en_releasepaper/content/1158


	8. A Novel Removal Method of Trace Silicon Impurity from Aluminum Tri-isopropoxide
	Wang Mingyan,Ning Guiling
	Mathematics 20 October 2004
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	Abstract:A novel purification method is proposed to remove trace silicon impurity from aluminum tri-isopropoxide. By interacting a lanthanide-metal complex with the silicon impurity in aluminum tri-isopropoxide, an involatile silicon-containing compound is formed. After a vacuum distillation the silicon content in aluminum tri-isopropoxide can be reduced from 16 ppm to less than 2.6 ppm. The purification process was described and discussed.
	TO cite this article:Wang Mingyan,Ning Guiling. A Novel Removal Method of Trace Silicon Impurity from Aluminum Tri-isopropoxide[OL].[20 October 2004] http://en.paper.edu.cn/en_releasepaper/content/1155


	9. An Economic Optimal Model For Risk Analysis of IT Security
	Shixiong Zhang,Xiufeng Bao ,Lei Wang
	Mathematics 06 October 2004
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	Abstract:A complicated problem faced by organizations is how to balance their potential opportunity costs against the expense of securing their IT infrastructure (preventative defensive measures). The primary goal of this paper is to minimize the costs when we implement preventive defensive measures in a new university campus or enterprise. On the basic assumption that the opportunity costs function are all inverse proportion functions, and with our introduction of 0-1 variables to represent different defensive measure, we constructed an non-linear, restricted optimal model (see formula (10)) to obtain a minimum costs. With the help of the mathematic software LINGO we got the minimum costs and determined the corresponding politic and technical defensive measures.
	TO cite this article:Shixiong Zhang,Xiufeng Bao ,Lei Wang. An Economic Optimal Model For Risk Analysis of IT Security[OL].[ 6 October 2004] http://en.paper.edu.cn/en_releasepaper/content/1127


	10. Periodic Quasilinear Parabolic Equation with Nonlocal Terms
	Zhou Qian,Huang Rui,Ke Yuanyuan,Wang Yifu
	Mathematics 23 September 2004
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	Abstract:In this paper, we study the existence of non-trivial nonnegative periodic solutions for periodic quasilinear parabolic equation with nonlocal terms based on the theory of Leray-Schauder's degree.
	TO cite this article:Zhou Qian,Huang Rui,Ke Yuanyuan, et al. Periodic Quasilinear Parabolic Equation with Nonlocal Terms[OL].[23 September 2004] http://en.paper.edu.cn/en_releasepaper/content/1089

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