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STUDY OF MECHANISM OF RQ EMBRITTLEMENT OF Fe_(73.5)Cu_1-Nb_3Si_(13.5)B_9 NANOCRYSTALLINE SOFT MAGNETIC ALLOY

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Acta Metallurgica Sinica(English Letters) 2002年第4期15卷 363-368页

作者： X.G.Cao,J.L.Huang,E.Sukedai,Y.G.Wang,W.Z.Chen and S.X.Zhou Henan University of Science and Technology, Luoyang 471003, china Okayama University of Science, Okayama 700, Japan beijing Laboratory of Electron Microscope, The {2. academy of sciences, Beij Henan Univ. of Sci. and Technol. Luoyang 471003 China

Rapidly quenching embrittlement (RQE) sometimes appears in nanocrystalline soft magnetic alloy (FINEMET) during production process. As a re-sult of RQE the ductility of the as-quenched ribbon drops seriously. The mechanism of RQE has been elucidated in the recent works of current authors. R was believed that RQE is due to the structural relaxation but not related to α-Fe(Si) crystallization. In this paper, the high resolution TEM (HRTEM) method and image digital processing were applied to analyze the HRTEM images of two FINEMET rapidly quenched ribbons with different thicknesses in detail. In the thinner ductile sample, the ordering domains with the size of about 3nm are observed. In the thicker RQE sample, the metastable nanocrystalline domains with the size of 18nm are observed along with the structural relaxation. These domains seem to have Fe3B-like metastable phase struc-ture on nanometer scale. The result indicates that the local atomic ordering regions extend when RQE induced by structural relaxation occurs.

关键词： HRTEM FINEMET rapidly quenching embrittlement mecha-nism

Bibarba bibarbata:A new genus and species of Cobitinae(Pisces:Cypriniformes:Cobitidae) from Guangxi Province (china)

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Bibarba bibarbata:A new genus and species of Cobitinae(Pisce...

中国海洋湖沼动物学会鱼类学分会第七届会员代表大会暨朱元鼎教授诞辰110周年庆学术研讨会

作者： Yongxia Chen~(1,2. Yifeng Chen~1 1.Laboratory of Biological Invasion and Adaptive Evolution,Institute of Hydrobiology,chinese academy of {2.,Wuhan 430072.Hubei Province,china 2.Graduate School of the chinese academy of {2.,beijing 10003.,china

A new genus of Cobitinae,Bibarba gen.n.,and a new species,*** sp.n.,were discovered and are described for the Chengjiang River,a tributary of the Hongshuihe River in Guangxi Province of southern *** new genus resemble...

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STRUCTURES OF POISSON'S RATIO OF THE QINLING-DABIE OROGENIC BELT

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Scientia Geologica Sinica 1999年第1期 7-16页

作者： Sun Ruomei Liu Futian Liu Jinsong (Institute of Geophysics, chinese academy of {2., beijing 100101)

By using of 55931 data of P-S travel time of regional earthquakes in 1981-1996 recorded in the Qinling -Dabie orogenic belt and adjacent areas, seismic tomography on Vp/Vs is carried out and then structures of Poisson's ratio are deducted. Our major findings are f (1) the σ images in the upper, the middle and the lower crust of the Qinling-Dabie orogenic belt show a pattern of three segments - West Qinling, East Qinling (bounded by Foping-Xian fault) and Dabie (bounded by the Dawn-Luoshan fault), (2. the high a σ in the shallow crust of Qinling are indicative of extensive developed microcracks, (3) the a values in the middle crust of Qinling are lower than those in the upper crust of Qinling, but the a values in the middle crust of Dabie are higher than those in the upper of Dabie - the difference between Qinling and the Dabie may be due to their deferent compositions of rocks, (4) along the Tancheng-Lujiang fault there is a high σ belt in the upper mantle.

关键词： ACTA Li STRUCTURES OF POISSON’S RATIO OF THE QINLING-DABIE OROGENIC BELT

Transferability of EST-derived SSR and genomic SSR markers from wheat to chinese silvergrass,a potential biomass crop

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Transferability of EST-derived SSR and genomic SSR markers f...

The Second International Symposium on Bioenergy and Biotechnology——in Conjunction with Miscanthus Workshop

作者： Jinjin Chen1,2.3,Hua Zhao1,2.Junhua Peng1,2.1 Wuhan Botanical Garden,chinese academy of {2.,Wuhan,Hubei 430074,china 2.Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture,chinese academy of {2.,Wuhan,Hubei 430074,china 3 Graduate University of chinese academy of {2.,19 Yuquan Road,beijing 100049,china

Microsatellite or simple sequence repeat (SSR) markers are highly informative and widely used in plant genetic and breeding studies. However,a very limited number of

关键词： Miscanthus,transferability,genetic diversity,wheat,EST-SSR,genome-SSR

Change of asphaltene and resin properties after catalytic aquathermolysis

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Petroleum Science 2009年第2期6卷 194-200页

作者： Yi Yufeng Li Shuyuan Ding Fuchen Yu Hang School of Chemical Science and Engineering China University of Petroleum （Beijing） Beijing 102249 China School of Chemical Engineering Beijing Institute of Petrol-chemical Technology Beijing 102617 China

Resin and asphaltene were separated from Liaohe heavy oil. Catalytic aquathermolysis of asphaltene and resin was investigated by using water soluble catalysts （NiSO4 and FeSO4） and oil soluble catalysts （nickel naphthenate and iron naphthenate）. Before and after aquathermolysis, the properties of the resin and asphaltene was compared by means of ultimate analysis, vapor pressure osmometer （VPO） average molecular weight, X-ray diffraction （XRD）,^13C and ^1H nuclear magnetic resonance （NMR）. The conversion sequence was as follows： No-catalyst〈NiSO4〈FeSO4〈nickel naphthenate〈iron naphthenate. In the presence of catalysts, the amount of H2.and CO increased significantly, while H2. in the gas product decreased. The molecular weight of asphaltene and resin increased after reaction without catalyst. But the catalysts restrained this trend. The H/C ratio of asphaltene and resin decreased after reaction. From the results of average structural parameters and molecular weight, it was found that asphaltene and resin were partly aggregated after aquathermolysis.

关键词： Asphaltene resin aquathermolysis molecular weight catalyst

Effects of two microbial inoculums in bait on the survival,growth performance and water quality of ark shell seed,Scapharca broughtoni

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Effects of two microbial inoculums in bait on the survival,g...

中国动物学会·中国海洋湖沼学会贝类学分会第九次会员代表大会暨第十五次学术讨论会

作者： Sun Guoxiang~(1,3) Liu Zhipei~2.Chen Zhu~(1,3) Liang Jun~4 Liu Ying~(1,4) 1.Institute of Oceanology,chinese academy of {2.,Qingdao 2.6071,china 2.Institute of Microbiology,chinese academy of {2.,beijing 100101,china 3.Graduate University of chinese academy of {2.,beijing 100049,china 4.Dalian Zhangzidao Fishery Group Co.,Ltd

The present study was performed to investigate the effects of two microbial inoculums in bait on the survival,growth performance and water quality of ark shell seed,Scapharca broughtoni. Ark shell were fed with bait containing three graded ratios of Bacillus pumilus(0,0.5%,1%) for each three graded ratios of Rhodotorula mucilaginosa(0,0.5%,l%).The results of 5 weeks feeding trial showed that adding 0.5%of Bacillus pumilus and 0.5%of Rhodotorula mucilaginosa can significantly enhance the survival ration of ark shell,Scapharca broughtoni(P 0.5).Based on these results,adding the combination has greater effect than the single and the combination of 0.5%Bacillus pumilus and 0.5%of Rhodotorula mucilaginosa is optimal for increasing survival ration,growth performance and reducing the ammonia concentration in water.

关键词： Bacillus pumilus Rhodotorula mucilaginosa Growth performance Water quality Ark shell seed Scapharca broughtoni

Tuina Therapy of Lumbar Intervertebral Disc Protrusion

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中国针灸 1995年第S2期15卷 249-252页

作者： Jiang Weizhuang(Institute of OrthoP. /Trauma china academy of Traditional{2. Medicine beijing 100700, china)

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ＴｕｉｎａＴｈｅｒａｐｙｏｆＬｕｍｂａｒＩｎｔｅｒｖｅｒｔｅｂｒａｌＤｉｓｃＰｒｏｔｒｕｓｉｏｎ￥ＪｉａｎｇＷｅｉｚｈｕａｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＯｒｔｈｏＰ．／ＴｒａｕｍａＣｈｉｎａＡｃａｄｅｍｙｏｆＴｒａｄｉｔｉｏｎａｌＣｈｉｎｅｓｅＭｅｄｉ...

关键词： Tuina Therapy of Lumbar Intervertebral Disc Protrusion

Influence of “Holiday Tourism Circle of beijing” on Chengde Tourism Spatial Alteration and Reconstruction

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chinese Journal of Population,Resources and Environment 2006年第4期4卷 38-42页

作者： Li Chen1,2.Cheng Shengkui2.Chen Yuansheng2.Zhang Yingqiu1 1.College of Arts&Science,beijing Union University,beijing 100083,{2. 2.Institute of Geographical Science and Natural Resources Research,CAS,beijing 100101,{2. College of Arts & Science Beijing Union University Beijing 100083 China Institute of Geographical Science and Natural Resources Research CAS Beijing 100101 China Institute of Geographical Science and Natural Resources Research CAS Beijing 100101 China Institute of Geographical Science and Natural Resources Research CAS Beijing 100101 China College of Arts & Science Beijing Union University Beijing 100083 China

Chengde City,famous for its cultural sightseeing tourism industry,and is located in china's"Capital Holiday Tourism Circle".This location is advantageous,because of the recent boom in china's national tourism *** industry has gone through several structural and development changes with in the past several years.A result of these restructuring patterns is the great changes concerning competitive and cooperative relations among tourism destinations,which have precipitated the decline of the traditional sightseeing pattern. Northern china's"Capital Holiday Tourism Circle"is one of nine key areas within the chinese tourism industry under development during the Eleventh Five-Year *** the present article the method of"Distance Decline of The Tourist Flow"was used to define the flow of tourists in the Capital Holiday Tourism Circle and its influence upon Chengde's tourism spatial distribution.3 aspects will be discussed:(1)The transformation from sightseeing to leisure markets makes the change possible in Chengde's tourism spatial pattern.(2.The location advantage(adjacent to beijing and Tianjin) also leads to the change in Chengde tourism spatial pattern.(3)The establishment of freeways also contributes to a great degrees of change. The rapid development of leisure tourism might lead to the change from nucleus model to a diversified one within Chengde's ***,Chengde is developing the tourism industry with the central heritage area as the nucleus and the northern forest, pasture,southern mountain,and rivers as its periphery.

关键词： china Capital Holiday Tourism Circle Chengde city tourism space

Controllability of Switched Linear Systems

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Controllability of Switched Linear Systems

第二十六届中国控制会议

作者： Qiao Yupeng,Cheng Daizhan academy of Mathematics and Systems Science,chinese academy of sciences,beijing 100080,P.R.china

This paper considers the controllability of switched linear *** largest controllable subspace,C,of a switched linear system is well known [6].This paper shows that when the system is not completely controllable,C divides the state space into 2.or 3 path-wise connected invariant *** we consider whether each path-wise connected component is a controllable *** sufficient conditions are obtained for each sub-manifold to be a controllable sub-manifold.A few examples are given to demonstrate the result.

关键词： Switched linear system controllability Lie algebra