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GLOBALLY TOPOLOGICAL EQUIVALENCE OFNONAUTONOMOUS SYSTEMS

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Systems Science and Mathematical sciences 1998年第4期11卷 299-304页

作者： CHEN Mingwei(Department of Mathematics, Hailal Teacher,8 College, Haikou 571158, china)ZHENG Zuohuan(institute of Mathematics, Academia Sinica, beijing 100080, china)

The definition of the globally topological equivalence of nonautonomous sys-tems is introduced, and some sufficiency theorems about the globally topological equiva-lence of two systems are given.

关键词： Nonautonomous system globally topological equivalence globally asymp- totic quasi-equistability) uniform stability

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乔治·艾略特与维多利亚时代的责任观念

外国文学研究 2009年第4期31卷 104-112页

作者：乔修峰中国社会科学院外国文学研究所

责任是19世纪英国文化中的一个核心观念,当时的英国正处在剧烈的社会变革之中,社会上虽有重责任之风,却也不乏虚伪的责任话语。乔治.艾略特将责任视为挽救社会分裂的力量,成为维多利亚时代一种极有代表性的思想。对责任观念的思考贯穿... 详细信息

责任是19世纪英国文化中的一个核心观念,当时的英国正处在剧烈的社会变革之中,社会上虽有重责任之风,却也不乏虚伪的责任话语。乔治.艾略特将责任视为挽救社会分裂的力量,成为维多利亚时代一种极有代表性的思想。对责任观念的思考贯穿在她的小说之中,通常还会卷入小说的中心冲突中,体现在人物的内心挣扎和选择上;她对"邻人"、"家"、"社会"、"情感"等概念的认识也体现了她的责任观;她在作品中很少"谈"责任,却通过人物和情节对责任观念进行阐释,与当时流行的责任话语形成了对照,这与她个人的信仰历程以及对作家责任的认识不无关系。

关键词：责任乔治·艾略特维多利亚时代社会维系

Distribution mechanism of protonated 1,10-phenanthroline between unbuffered aqueous and 1,2-dichloroethane phases

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chinese Journal of Chemistry 1993年第4期11卷 316-320页

作者： LIN,Sin-Ru WANG,Fang LU,Xin-Gen Shanghai institute of Metallurgy,chinese academy of sciences,Shanghai 200050

The faradaic ion transfer of protonated 1,10-phenanthrolino [H(Phen)^+] across the interface between unbuffered aqueous and 1,2-dichloroethane(DCE)solutions was inves- tigated by means of current scan polarography at ascending aqueous electrolyte electrode, as well as *** follows from the splitting of the waves observed at the pH of aqueous phase(sodium sulfate solution)between 2.5—3.8 that neutral reagent(Phen) distributes into the aqueous phase,where it is *** positive wave is associated with the mass transfer controlled by the H^+ influx,whereas the negative one is by the Phen *** reverse chronopotentiometry indicated that all the protonated transfer processes were reversible.A good agreement between experimental results and theoretical treatment was *** aqueous acid dissociation constant of protonated Phen,K_a,can be evalu- ated from the dependence of the wave heights on the pH in the base of the equilibrium.

关键词： Distribution mechanism of protonated 1 10-phenanthroline between unbuffered aqueous and 1 2-dichloroethane phases

EFFECT OF HYDROGEN ABSORPTION ON MAGNETIC PROPERTIES OF AMORPHOUS Fe_(90-x) V_x Zr_(10) ALLOYS

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Acta Metallurgica Sinica(English Letters) 1989年第7期2卷 55-60页

作者： DUO Liang XU Zuxiong MA Ruzhang beijing University of Science and Technology,beijing.china institute of High Energy physics,Academia Sinica,P.O.Box 2732,beijing,china

The amorphous Fe_(90-x)V_xZr_(10) alloy after electolytic hydrogenation procedure was studied by means of Mossbauer effect,magnetic measurement.X-ray diffaction and secondary ion mass spectroscopy(SIMS)*** experimental results show that the magnetic properties of amorphous Fe_(90-x)V_xZr_(10) alloy are highly sensitive to the presence of hydrogen. The isomer shift(IS)has a small positive change and the magnetic properties transfer from paramagnetic to ferromagnetic State by hydrogenation,and the effect of hydrogen absorption is to raise Fe magnetic moment(from the increase of saturation maguetization)and Curie temperature T_c from 257 to 384 *** considerable increase of magnetic properttes of amorphous Fe_(90-x)V_xZr_(10) alloy by hydrogenation is attributable to the change of hybridization effect between outer electrons of Zr atoms and 3d electrons of Fe *** the results of SIMS experiment,it is concluded that the hydrogen atoms is localized around Zr atoms wheh hydrogen atoms enter into the allor.

关键词： amorphous alloy hydrogenation magnetic property

AN IMPROVEMENT ON JORGENS'S ASYMPTOTIC EXMNSION THEOREM FOR TRANSPORT EQUATION

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Systems Science and Mathematical sciences 1997年第2期10卷 114-119页

作者： SONG Degong (Department of Mathematics, Xi’an Jiaotong University, Xi’an 710049, china) ZHU Guangtian (institute of Systems Science, Academia Sinica, beijing 100080, china)

This paper is devoted to discussing the asymptotic expansion problem for neutron transport in a finite convex medium with energy bounded away from the origin. It is shown that Jorgens’s asymptotic expansion theorem holds under the L∞ norms i.e., for every ε > 0, there exist positive constants Cm(ε) and Tm(ε), such that for every ψ∈ L2 and t > Tm(ε).

关键词： Transport equation asymptotic expansion L~∞ norm.

The Carabid assemblage and their bioindicative value for the impact to biodiversity by invasive weed,Eupatorium adenophorum in south china

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The Carabid assemblage and their bioindicative value for the...

PDMS prism-glass optical coupling for surface plasmon resonance sensors based on MEMS technology

北京生物入侵国际研讨会

作者： Gu Weibin institute of Botany chinese academy of Science beijing 100093 china

＜正＞Carabids are usually considered as bio-indicators for biodiversity and environmental quality because of their sensitive reaction to habitat change and *** weed（Eupatorium adenophorum） is a serious invasive weed,having spread in several provinces of *** order to assess the impact of this invasive weed to biodiversity,we studied carabid assemlage in different invasive vegetation in Lancang,Yunnan *** this paper,the primary results are introduced and some discussions about the relationship between carabids and this invasive weed are included.

关键词： carabid biodiversity bioindicator Eupatorium adenophorum

来源： cnki会议评论

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Science china(Information sciences) 2010年第10期53卷 2144-2158页

作者： GENG ZhaoXin 1,2 , LI Qing 3 , WANG Wei 1 & LI ZhiHong 1 1 institute of Microelectronics, Peking University, beijing 100871, china 2 School of Information engineering, Minzu University of china, beijing 100081, china 3 School of sciences, Changchun University of Science and Technology, Changchun 130000, china 1. institute of Microelectronics Peking University Beijing 100871 China2. School of Information engineering Minzu University of China Beijing 100081 China3. School of Sciences Changchun University of Science and Technology Changchun 130000 China

A miniaturized surface plasmon resonance (SPR) chip has been developed for biomedical and chem-ical analysis with low cost and high performance. The techniques of bulk silicon micromachining and polymer replication were used to fabricate the Kretschmann SPR sensor composed of a Polydimethylsiloxane (PDMS) prism, a coupling glass and microchannels. The plasmon properties of thin metal films were investigated theoret-ically based on Fresnel analysis, with optical boundary conditions pertaining to the surface plasmon resonance at the gold/water and gold/air interfaces. The theoretical results show that difference in the refractive index (RI) between the PDMS prism and the coupling glass layer affect the precision of the SPR angle and the SPR curve. Meanwhile, the period of the interference fringe attaching on the SPR curve increases with an increase in wavelength and a decrease in the refractive index of the coupling glass layer. The gold thickness of 50 nm is required while employing a fixed incident wavelength of 650 nm, to achieve optimum SPR excitation conditions and the sensor sensitivity. The characteristics of this SPR sensor were evaluated in the angular interrogation mode of employing the incident wavelength of 650 nm in air and water media, respectively. The obtained SPR angles were approximately consistent with the theoretical ones.

关键词： surface plasmon resolance polymer microfluidic PDMS

THE CHABU-CHASANG ZONE IN NORTHERN XIZANG (TIBET)

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Scientia Geologica Sinica 1994年第2期 151-160页

作者： Li Yuejun Hao Jie Li Hongsheng and Yang Meifang(institute of Geology, chinese academy of sciences, beijing, 100029)

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The precipitation and effect of nano nitrides in HSLC steel

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Science china(Technological sciences) 2008年第7期51卷 989-998页

作者： FU Jie1, LIU YangChun1,2 & WU HuaJie1,3 1 School of Metallurgical and Ecological Engineering, University of Science and Technology beijing, beijing 100083, china 2 Shougang Technology Research institute, Shougang (Group) Corporation, beijing 100041, china 3 Metallurgical Engineering Research institute, University of Science and Technology beijing, beijing 100083, china 1. School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China 2. Shougang Technology Research institute Shougang (Group) Corporation Beijing 100041 China 3. Metallurgical Engineering Research institute University of Science and Technology Beijing Beijing 100083 China

The existing forms of N and Al in HSLC (high strength low carbon) steel produced by TSCR (thin slab casting and rolling process), the precipitation thermodynamics and kinetics of AlN, and its effects on structure and mechanical property are studied. The experimental results show that only a small quantity of nitrogen is com- bined into AlN in HSLC steel produced by TSCR and most of the nitrogen in steel is still free nitrogen. Aluminum-nitride is mainly precipitated during the period of slow air cooling after coiling, but not during rolling and water cooling. The acid-soluble aluminum has no obvious effect on the grain size and mechanical property of HSLC steel produced by TSCR whose acid-soluble aluminum content is 0.005%―0.043%. The precipitation of AlN is not the main cause of grain refinement of HSLC steel produced by TSCR, nor is AlN the dominating precipitate that has precipitation strengthening effect. The nano nitrides are not pure AlN, but have complex compositions.

关键词： thin slab casting and rolling high strength low carbon steel AlN nano nitride precipitation strengthening