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Involution Fixing∪from （i=1） to r(RP（1）)mi×(CP（1）)si*)

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Communications in Mathematical Research 1999年第1期 46-52页

作者： Ma Kai (Department of Mathmeatics, Sichuan university, Chengdu, 610064) Liu Zongze and Wang Yanying (Department of Mathematics, hebei normal university, shijiazhuang, 050016)

§０．ＩｎｔｒｏｄｕｃｔｉｏｎＷｅｗｒｉｔｅＦＰ（ｎ）ｆｏｒＣＰ（ｎ）（ｎ－ｄｉｍｅｎｓｉｏｎａｌｃｏｍｐｌｅｘｐｒｏｊｅｃｔｉｖｅｓｐａｃｅ）ｏｒＨＰ（ｎ）（ｎ－ｄｉ－ｍｅｎｓｉｏｎａｌｑｕａｔｅｒｎｉｏｎｉｃｐｒ... 详细信息

§０．ＩｎｔｒｏｄｕｃｔｉｏｎＷｅｗｒｉｔｅＦＰ（ｎ）ｆｏｒＣＰ（ｎ）（ｎ－ｄｉｍｅｎｓｉｏｎａｌｃｏｍｐｌｅｘｐｒｏｊｅｃｔｉｖｅｓｐａｃｅ）ｏｒＨＰ（ｎ）（ｎ－ｄｉ－ｍｅｎｓｉｏｎａｌｑｕａｔｅｒｎｉｏｎｉｃｐｒｏｊｅｃｔｉｖｅｓｐａｃｅ）．Ｍｎ...

关键词： Involution Bordism Wu’s Formula

Primary evidence for involvement of IP3 in heat-shock signal transduction in Arabidopsis

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Cell Research 2006年第4期16卷 394-400页

作者： Hong Tao Liu~(1,2,*) Fei Gao~(1,2,*) Shu Juan Cui~2 Jin Long Han~(1,2) Da Ye Sun~2 Ren Gang Zhou~1 ~1 Institute of Genetics and Physiology,hebei Academy of Agricultural Sciences,shijiazhuang 050051,china ~2Institute of Molecular Cell Biology,hebei normal university,shijiazhuang 050016,china InstituteofGeneticsandPhysiology HebeiAcademyofAgriculturalSciencesShijiazhuang050051China InstituteofMolecularCellBiology HebeiNormalUniversityShijiazhuang050016China

The role of inositol 1,4,5-trisphosphate （IP3） in transducing heat-shock （HS） signals was examined in *** whole-plant IP3level increased within 1 min of HS at 37℃.After 3 min of HS,the IP3level reached a maximum2.5 fold *** the transgenic Arabidopsis plants that have AtHsp18.2plvmoter-β-glucuronidase （GUS） fusiongene,it was found that the level of GUS activity was up-regulated by the addition of caged IP3at both non-HS and HStemperatures and was down-regulated by the phospholipase C （PLC） inhibitors {1-[6-((17β-3-Methoxyestra-1,3,5（10）-trien-17-yl)amino)hexyl]-2,5-pyrrolidinedione} （U-73122）.The intracellular-free calcium ion concentration ([Ca2+]i) increased during HS at 37℃ in suspension-cultured Arabi-dopsis cells expressing *** with U-73122 prevented the increase of [Ca2+]ito some *** provided primary evidence for the possible involvement of IP3in HS signal transduction in higher plants.

关键词： heat shock signal transduction IP3 PLC [Ca2+]i Arabidopsis

Density functional theory study of the magnetic properties of rare earth complexes:the magnetic coupling mechanism in Y~Ⅲ and Gd~Ⅲ complexes with nitronyl nitroxide

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Science china Chemistry 2009年第11期52卷 1961-1968页

作者： REN Jie1,2,WANG BingWu1 & CHEN ZhiDa1 1 Beijing National Laboratory for Molecular Sciences,State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking university,Beijing 100871,china 2 College of Science,hebei university of Science and Technology,shijiazhuang 050018,china 1. Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing 100871 China 2. College of Science Hebei University of Science and Technology Shijiazhuang 050018 China

The magnetic coupling interactions of the nitronyl nitroxide radicals bound to diamagnetic(YⅢ) and paramagnetic(GdⅢ) rare earth ions in two model magnetic systems based on novel rare earth organic radical complexes Ln(hfac)3(NITPhOCH3)2(Ln=YⅢ 1,GdⅢ 2;hafc = hexafluoroacetylacetonate;NIT-PhOCH3 = 4'-methoxyo-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) have been investigated by density functional theory(DFT).The magnetic coupling mechanisms were also explored from the viewpoint of molecular orbital and spin density *** calculations show that the empty 4d-orbitals of YⅢ and 5d-orbitals of GdⅢ play an important role in the antiferromagnetic coupling between the two nitronyl nitroxide radical ligands,and that the ferromagnetic coupling between the GdⅢ ion and the radical magnetic centers can be attributed to the nearly complete localization of the isotropic 4f-shell and singly occupied magnetic orbital(π) of the nitronyl nitroxide.

关键词： magnetic coupling density functional theory rare earth ion gadolinium(Ⅲ) complexes yttrium(Ⅲ) complexes

Pollen assemblage characteristics of lakes in the monsoon fringe area of china

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Chinese Science Bulletin 2008年第4期53卷 3354-3363页

作者： TIAN Fang1,2,XU QingHai1,2,3,LI YueCong1,2,CAO XianYong1,2,WANG XueLi1,2 & ZHANG LiYan1,2 1 College of Resources and Environmental Sciences,hebei normal university,shijiazhuang 050016,china 2 hebei Key Laboratory of Environmental Change and Ecological Construction,shijiazhuang 050016,china 3 Key Laboratory of Western china’s Environmental System(Ministry of Education),Lanzhou university,Lanzhou 730000,china College of Resources and Environmental Sciences Hebei Normal University Shijiazhuang 050016 China hebei Key Laboratory of Environmental Change and Ecological Construction Shijiazhuang 050016 China Key Laboratory of Western china’s Environmental System (Ministry of Education) Lanzhou University Lanzhou 730000 China

This paper presents the pollen assemblages from 108 surface sediment samples from 4 lakes(the Lake Daihai,Lake Hongjiannao,Lake Hulunnao and Lake Duikounao) in the monsoon fringe area of *** herb pollen taxa Artemisia,Chenopodiaceae,Poaceae and Compositae are the major components of pollen assemblages of the 4 lakes and Pinus,Betula,Quercus,Ulmus,Populus,Ostryopsis and Elaeagnaceae are frequently presented,which reflect regional and local vegetation *** mean similarity coefficients for samples from the Lake Daihai,Lake Hongjiannao,Lake Hulunnao and Lake Duikounao are 0.66 ± 0.17,0.71 ± 0.11,0.73 ± 0.12 and 0.67 ± 0.12 respectively,so pollen assemblages are relatively consistent in each lake,which shows that focusing and mixing effects have occurred before and after pollen ***,pollen assemblages do differ between sampling sites in each *** largest difference is seen in the Lake Daihai,followed by the Lake Duikounao,Lake Hulunnao and Lake Hongjiannao(The mean Euclidean distance is 20.09 ± 11.11,11.22 ± 3.64,10.67 ± 4.03 and 8.44 ± 4.51 respectively).These differences are possibly caused by the differences of focusing and mixing effects,pollen source areas,drainage areas and regional vegetation *** Lake Daihai and Lake Hongjiannao have water deeper than 5 m and strong re-suspension,focusing and mixing effects occur in the lakeshore and shallow water areas,where pollen concentrations are lower than in deeper lake *** the Lake Hulunnao and Lake Duikounao,with depths less than 5 m,re-suspension and mixing effects are obvious across the whole lake area,so pollen assemblages and pollen concentra-tions are more consistent among sampling sites in each *** between the lake samples and samples from the inflowing river reveals that wind is primary pollen transportation force in the Lake Hongjiannao,where the consistency of pollen assemblage is conspicuous,while there is greater variation in lakes where pollen input is

关键词：湖泊花粉相似系数欧几里得季风

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Rock matrix-fractured media model for heterogeneous and fractured coal bed

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中国有色金属学会会刊：英文版 2011年第S3期21卷 621-625页

作者： ZHANG Chun-hui1, YU Guang-ming2, ZHANG Chun1 1. School of Civil Engineering, hebei university of Science and Technology, shijiazhuang 050018, china 2. School of Civil Engineering, Qingdao Technological university, Qingdao 266033, china [a] School of Civil Engineering Hebei University of Science and Technology Shijiazhuang 050018 China [b] School of Civil Engineering Qingdao Technological University Qingdao 266033 China

Coal was considered rock matrix-fractured media composed of rock matrix and fractures, and the rock matrix-fractured media model for heterogeneous and fractured coal bed was presented. In this model the rock matrix is heterogeneous, and the mechanical parameters such as elastic modulus and strength follow Weibull distribution. Fractures in coal bed were generated with the discrete fracture network method, and the properties of fractures were simulated with Desai element. Then the virtual generating system (VGS) of natural heterogeneous and fractured coal bed was developed in Matlab 6.0. The coupled model of gas flow and deformation process based on the rock matrix-fractured media model method and VGS for heterogeneous and fractured coal bed was presented, and the numerical code was developed in Matlab 6.0. The gas flow process in the heterogeneous and fractured coal bed was simulated in a numerical case. The main conclusions are: 1) The natural heterogeneous and fractured coal bed could be simulated by the rock matrix-fractured media model and VGS; 2) The fractures connected with the well have much more effects on gas flow than those non-connected.

关键词： heterogeneity fractures rock matrix-fractured media

Some Properties of Cauchy-Type Singular Integrals in Clifford Analysis

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Journal of Mathematical Research with Applications 2012年第2期32卷 189-200页

作者： Heju YANG 1,2,Yuying QIAO 1,Sha HUANG 1 1.College of Mathematics and Information Science,hebei normal university,hebei 050016,P.R.china 2.College of Science,hebei university of Science and Technology,hebei 050018,P.R.china College of Mathematics and Information Science Hebei Normal University Hebei 050016

First,we give a module estimation of the singular integral with a differential *** by proving the existences of Cauchy principal value we obtain the transformation formula of the Cauchy-type singular integrals with a ... 详细信息

关键词： Clifford analysis Cauchy principal value Cauchy-type singular integral with a parameter transformation formula.

Robust Joint Timing and Frequency Synchronization Algorithm for IEEE802.16e OFDM System

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Transactions of Tianjin university 2007年第5期13卷 360-364页

作者：董国军戴居丰魏志成 School of Electronic Information Engineering Tianjin University Department of Network Engineering Hebei Normal UniversityShijiazhuang 050016China

Based on the structures of the short preamble and long preamble, which are defined for synchronization in IEEES02.16e specification, the robust synchronization algorithm for IEEES02.16e OFDM system is proposed. The correlations among the sample sequences in the preamble are investigated, especially the correlation between the first sample sequence and the last sample sequence in the long preamble. The conventional joint timing and frequency synchronization algorithm is reviewed based on the short preamble referring to the algorithm proposed by Schmidl, then a robust joint timing and frequency synchronization algorithm is proposed based on the long preamble. The simulations in the multi-path and frequency selective fading channel show that the proposed algorithm has improved the performances of timing metric plateau, timing offset and synchronization acquisition time even when signal-to-noise ratio is less than -5 dB.

关键词： IEEE802.16e OFDM synchronization preamble correlation estimation training sequence

On the Cayley-Bacharach property and the construction of vector bundles

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Science china Mathematics 2011年第9期54卷 1891-1898页

作者： SUN Hao 1,2 1 Department of Mathematics and Statistics,Huazhong normal university,Wuhan 430079,china 2 Department of Mathematics,East china normal university,Shanghai 200241,china 1. Department of Mathematics and Statistics Huazhong Normal University Wuhan 430079 China2. Department of Mathematics East China Normal University Shanghai 200241 China

We study the Cayley-Bacharach property on complex projective smooth varieties of dimension n≥2 for zero dimensional subscheme defined by the zero set of the wedge of r-n + 1 global sections of a rank r≥n vector bund... 详细信息

关键词： Cayley-Bacharach property vector bundle reflexive sheaf k-very ample

DISSOLUTION EQUILIBRIUM OF Mg VAPOUR IN LIQUID Fe

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Acta Metallurgica Sinica(English Letters) 1991年第9期4卷 230-233页

作者： ZHANG Xiaodong HAN Qiyong university of Science and Technology Beijing,Beijing,chinaCHEN Dong hebei Institute of Metallurgy,shijiazhuang,china Univ of Science and Technology Beijing Beijing China

The dissolution equilibrium of magnesium vapour in liguid Fe has been studied in a two-tem- perature-zone furnace at 1600℃ by use of the vapour pressure *** equilibrium con- stant for the reaction Mg_(g)=[Mg] and the... 详细信息

关键词： liquid Fe Mg dissolution equilibrium