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JOURNAL OF BEIJING NORMALUNIVERSITY (NATURAL SCIENCE)

2009Äê2Ô  µÚ45¾íµÚ1ÆÚ   Vol.45   No.1  Fbr. 2009

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The research of the existence of universal hypergraphs¡­¡­WU Maonian   SHEN Fuxing   FU Yingying(1)

Canonical forms of band modules¡­¡­ZHAO Deke   ZHANG Yingbo(5)

Marcinkiewicz integral operators and extrapolation¡­¡­QU Meng(14)

Symmetric center test by using U-statistics¡­¡­WANG Fang   CUI Hengjian   JIN Jiao(17)

Two classes of domestic bocses¡­¡­ZHANG Xueying   ZHANG Yingbo(22)

L^p-boundedness of multilinear oscillatory singular integral operator¡­¡­XIA Xia(26)

Average widths of C^r([0,1]^d) equipped with Gaussian measure satisfies Sacks-Ylvisaker conditions¡­¡­QIAN Lixin(31)

Enumeration of generalized Dongmei maps(¢ò)¡­¡­LONG Shude   CAI Junliang(34)

The study of the anomalous c-axis resistivity in holeª²doped bilayer triangular antiferromagnets¡­¡­GUAN Xin   HE Jing   LIANG Ying(37)

A modified weightª²adding FCM algorithm with spatial information¡­¡­LIU Chongjin   GUO Xiaojuan   CHEN Cheng   YAO Li£¨ 42 £©

Extraction of wealth factors based on data mining ¡­¡­CHEN Chuanliang   TIAN Yingjie   DENG Naiyang£¨ 46 £©

The study of density function theory on the molecular spectra and excited state of fluorid pentacene¡­¡­ZHONG Shouxian    DU Gonghe   REN Zhaoyu   HUANG Yuanhe£¨ 50 £©

A preliminary study on novel ^99mTc nitrido complexes with xanthate ligand¡­¡­LIU Chun   SHENG Xi£¨ 54 £©

The photografting of methyl methacrylate onto lowª²density polyethylene initiated by acetone-water-ethanol system¡­¡­WANG Xiaoxiao   WANG Huiliang£¨ 57 £©

Vegetation model of Robinia pseudoacacia L. in the loess planteau¡­¡­LI Jinzhao   LI Zhongwen   MOU Pu   GE Jianping£¨ 62 £©

Optimizing conditions for calcineurin activity in SH-SY5Y cell extracts¡­¡­TU Linghui   MA Jie   TONG Li   WEI Qun   LUO Jing£¨ 66 £©

On nationwide Giant Panda and habitat monitoring techniques¡­¡­WEN Zhanqiang   REN Yi   JIN Xuelin   ZHENG Guangmei£¨ 70 £©

Niches of wetland plant species in the Yellow River delta under soil nutrient gradients¡­¡­HU Qiaomu   YANG Shuqian   LI Wei   CUI Baoshan£¨ 75 £©

Trends of annual natural runoff in the Yellow River basin¡­¡­LI Chunhui   ZHENG Xiaokang   YANG Zhifeng   PANG Aiping   SHEN Nan£¨ 80 £©

Classification and counter measure research on water scarcity in China¡­¡­XU Xinyi   WANG Shaowei   PANG Bo   YANG Liying   WANG Hongrui£¨ 86 £©

Spatial patterns of biodiversity in alpine meadow on Wutai Mountain¡­¡­JIANG Yuan   HUANG Xiaoxia   LIU Quanru   HE Kejian   YANG Yan¬ðgang£¨ 91 £©

NMF with binary constraint and its application¡­¡­CHEN Qinghua   CHEN Liujun   GUO Jinzhong£¨ 96 £©

Express transportation network analysis with complex network theory¡­¡­YANG Hua   NIE Yuchao   ZHANG Hongbin   FAN Ying£¨101£©

The use of ALEPH  500¡ªan integrated library system¡­¡­FENG Ruiqin   JIA Xilan   GUO Jianfeng£¨104£©

Biomechanics of flip and loop jumps in figure skating¡­¡­JI Zhongqiu   JIANG Guiping£¨107£©