显示条目: 14637-14656 / 166236

    • H ilbert 空间中g-Parseva l 框架的一些性质 

      肖祥春; 朱玉灿; 曾晓明 (数学学报(中文版), 2008-11)
      在Hilbert 空间中讨论g-Parseval 框架的一些性质 , 得到g-Parseval 框架约一些恒等式和不等式
    • H 公司供应商评价与选择研究 

      黄熙 (2012-06-19)
      当前,市场对产品更新换代的要求速度不断加快,对产品的个性化需求也日益显著。为了满足这些需求变化,企业除了不断加强自身的能力外,还需要有强大的供应商网络为其提供质量可靠、价格优惠、交期准时、设计多样化的物料,以满足其生产要求并确保市场供应。因此,评价与选择合适的供应商就显得尤为重要。H公司是一家塑胶行业的OEM厂商,主要为客户提供以精密塑胶为基础的产品。经过11年的发展,公司正处于快速成长阶段。然而,随着新客户的开发,公司多年前形成的供应 ...
    • H 公司发展战略研究 

      叶展 (2013-11-20)
      我国外贸行业一直是国民经济增长的重要拉动力之一。在全球一体化的今天,在全世界都来与中国做生意的今天,我国的专业外贸公司的生存和发展却面临着巨大的压力。在这样的环境下,研究外贸企业的发展战略具有重要的现实意义。本文在查阅大量资料、广泛收集数据、融合所学知识的基础上,以H公司为研究对象,运用波特的五力模型、行业集中度、EFE、IFE、SWOT、BCG、市场吸引力矩阵等分析方法对公司的外部环境和内部优势劣势进行了分析,并根据战略管理的相关理论 ...
    • Hæ 控制的几何方法 

      谭文 (1993-06-30)
      本文详细阐述了以krein空间框架为基础的几何方法在Hæ控制问题中的应用。首先文章从几何方法出发,综合已有的有关结果,给出更加明确的分析与解释,然后将标准Hæ控制问题的解推广到非线性形式。其次,文章利用几何方法对约束Hæ问题进行处理。最后论证了多目标Hæ控制问题能够归结为约束Hæ问题加以解决。这些结论表明,本文采用的几何方法对解决Hæ控制问题是合适的且有效的。
    • H-1 and C-13 NMR signal assignments of Paecilin A and B, two new chromone derivatives from mangrove endophytic fungus Paecilomyces sp (tree 1-7) 

      Guo, Zhiyong(Zhongshan Univ, Sch Chem & Chem Engn); She, Zhigang(Zhongshan Univ, Sch Chem & Chem Engn); Shao, Changlun(Zhongshan Univ, Sch Chem & Chem Engn); Wen, Lu(Zhongshan Univ, Sch Chem & Chem Engn); Liu, Fan(Zhongshan Univ, Sch Chem & Chem Engn); Zheng, Zhonghui; 郑忠辉; Lin, Yongcheng(Zhongshan Univ, Sch Chem & Chem Engn) (JOHN WILEY & SONS LTD, 2007)
      Two new natural products, named paecilin A (1) and B (2), together with two known compounds secalonic acid D (3) and (11)-cytochalasa-6(12),13-diene-1,21-dione-16,18-dimethyl-7-hydroxy-10-phenyl-(7S*,13E,16S*,18S*) (4), ...
    • H-1 MAS NMR characterization of hydrogen over silica-supported rhodium catalyst 

      Chao, ZS; 晁自胜; Wu, TH; 吴廷华; Ye, JL; 叶剑良; Chen, GZ; 陈国周; Wan, HL; 万惠霖 (SCIENCE PRESS, 2001)
      Hydrogen species in both SiO2 and Rh/SiO2 catalysts pretreated in different atmospheres (H-2. O-2, helium or air) at different temperatures (773 or 973 K) were investigated by means of H-1 MAS NMR. In SiO2 and O-2-pretreated ...
    • H-1 MAS NMR spectra of hydroxyl species on diatomite surface 

      Yuan, P; Wu, DQ; Chen, Z; 陈忠; Chen, ZW; Lin, ZY; 林种玉; Diao, GY; Peng, JL (SCIENCE PRESS, 2001)
      High spinning speed H-1 magic-angle spinning nuclear magnetic resonance (1H MAS NMR) was used to detect surface hydroxyl groups of diatomite, which include isolated hydroxyl groups and hydrogen-bonded hydroxyl groups, and ...
    • H-1 MAS NMR spectra of kaolinite/formamide intercalation compound 

      Wang, LJ; Yuan, P; Chen, ZW; Chen, Z; 陈忠 (SCIENCE CHINA PRESS, 2002)
      The high spinning speed H-1 magic angle spinning nuclear magnetic resonance (H-1 MAS NMR) technique was employed to distinguish the two groups of surface hydroxyls of kaolinite and investigate the intercalation mechanism ...
    • H-1 NMR properties of trinuclear transition-metal complexes [M-3 O-square(OOCR)(6)L-3](+) (M = Cr, Fe, Mn; R = CH3, C2H5,CH2NH2; L = C5H5N, H2O) 

      Chen, Z.; 陈忠; Cai, SH; 蔡淑惠; Ye, JL; 叶剑良; Zhang, LN; 张琳娜; Lu, GT; 卢葛覃 (CHINESE JOURNAL STRUCTURAL CHEMISTRY, 1999)
      A series of oxo-centered trinuclear transition-metal complexes with general formula [(M3O)-O-II(OOCR)(6)L-3](+) (M = Cr, Fe, Mn; R = CH3, C2H5, CH2NH2; L = C5H5N, H2O) were studied by H-1 NMR spectra. The investigation was ...
    • H-1 NMR spectroscopy analysis of metabolites in the kidneys provides new insight into pathophysiological mechanisms: applications for treatment with Cordyceps sinensis 

      Zhong, Fang; Liu, Xia; Zhou, Qiao; Hao, Xu; Lu, Ying; Guo, Shanmai; Wang, Weiming; Lin, Donghai; Chen, Nan; 林东海 (NEPHROL DIAL TRANSPL, 2012-02)
      The number of patients with chronic kidney disease (CKD) is continuously growing worldwide. Treatment with traditional Chinese medicine might slow the progression of CKD. In this study, we evaluated the renal protective ...
    • H-1 NMR study on the products of the catalytic reduction of ethyne by nitrogenase in D2O 

      Chen, Z; 陈忠; Lin, GX; 林国兴; Cai, SH; 蔡淑惠; Xu, X; 徐昕; Huang, JW; 黄静伟; Wan, HL; 万惠霖; Cai, QR; 蔡启瑞 (ACTA CHIMICA SINICA, 1999)
      The products of the catalytic reduction ethyne by nitrogenase in D2O were studied by H-1 NMR. In order to assign the H-1 NMR spectrum, the theoretical spectra of C2H2D2 were calculated using group symmetry. The final ...
    • H-1 NMR-based metabolomic analysis of triptolide-induced toxicity in liver-specific cytochrome P450 reductase knockout mice 

      Liu, Xia; Xue, Xiang; Gong, Likun; Qi, Xinming; Wu, Yuanfeng; Xing, Guozhen; Luan, Yang; Xiao, Ying; Wu, Xiongfei; Li, Yan; Chen, Min; Miao, Lingling; Yao, Jun; Gu, Jun; Lin, Donghai; Ren, Jin (SPRINGER, 2012-10)
      Triptolide (TL) is an active component of Tripterygium wilfordii Hook. F which is used to treat autoimmune and inflammatory disease. However, a high incidence of adverse effects is often observed in clinic. Previously we ...
    • H-1 NMR-based Metabonomic Analysis of Metabolic Changes in Streptozotocin-induced Diabetic Rats 

      Zhao, Liangcai; Liu, Xia; Xie, Liyun; Gao, Hongchang; Lin, Donghai; 林东海 (ANAL SCI, 2010-12)
      Diabetes mellitus is a complex metabolic disorder characterized by chronic hyperglycemia, hypoinsulinemia, and ketosis. To access the biochemical process of diabetes, we applied quantitative H-1 NMR-based metabonomics to ...
    • H-1, C-13 and N-15 backbone and side-chain resonance assignments of reduced CcmG from Escherichia coli 

      Wu, Chengyan; Hong, Jing; Liao, Xinli; Guo, Chenyun; Wu, Xueji; Hu, Hongyu; Lin, Donghai; 廖新丽; 郭晨云; 吴学记; 林东海 (SPRINGER, 2013)
      CcmG is a periplasmic, membrane-anchored protein widely distributed in a variety of species. In Escherichia coli, the CcmG protein always acts as a weak reductant in the electron transport chain during cytochrome c maturation ...
    • H-1, C-13, N-15 backbone and side-chain resonance assignments of the human adenylate kinase 1 in apo form 

      Fu, Cuiping; Peng, Yu; Liao, Xinli; Guo, Chenyun; Lin, Donghai; 廖新丽; 郭晨云; 林东海 (SPRINGER, 2013)
      AK1 (Adenylate Kinase 1) plays crucial roles in processes such as cellular phosphotransfer networks, neuronal maturation and regeneration, gating of ABC transporter CFTR, tumor cell metabolism and myocardial energetic ...
    • H-1, C-13, N-15 backbone and side-chain resonance assignments of the human Raf-1 kinase inhibitor protein 

      Yi, Cuiying; Peng, Yu; Guo, Chenyun; Lin, Donghai; 郭晨云; 林东海 (BIOMOL NMR ASSIGN, 2011-04)
      Raf-1 kinase inhibitor protein (RKIP) plays a pivotal role in modulating multiple signaling networks. Here we report backbone and side chain resonance assignments of uniformly N-15, C-13 labeled human RKIP.
    • H-1-NMR-based metabonomic analysis of metabolic profiling in diabetic nephropathy rats induced by streptozotocin 

      Zhao, Liangcai; Gao, Hongchang; Lian, Fulin; Liu, Xia; Zhao, Yongxiang; Lin, Donghai; 林东海 (AM J PHYSIOL-RENAL, 2011-04)
      Zhao L, Gao H, Lian F, Liu X, Zhao Y, Lin D. H-1-NMR-based metabonomic analysis of metabolic profiling in diabetic nephropathy rats induced by streptozotocin. Am J Physiol Renal Physiol 300: F947-F956, 2011. First published ...
    • H-2-uptake activity, spectra, reduction potentials, and kinetics of iron release on the surface of iron core from Azotobacter vinelandii bacterial ferritin 

      Huang, HQ; 黄河清; Xu, LS; Zhang, FZ; Qiu, XH; Lin, QM; Huang, JW; Zao, H; Huang, NC; Zeng, RY; Zeng, D (PLENUM PUBL CORP, 1998)
      Bacterial ferritin from Azotobucter vinelandii (AvBF(o)) has a function in H-2 uptake. The Fe3+ reduction on the surface of the iron core from AvBF(o) is accompanied simultaneously by H-2 uptake, with a maximum activity ...
    • H-D kinetic isotope effects of alcohol electrooxidation on Au, Pd and Pt electrodes in alkaline solutions 

      Ren, Jie; Yang, Yao-Yue; Zhang, Bin-Wei; Tian, Na; Cai, Wen-Bin; Zhou, Zhi-You; Sun, Shi-Gang; 田娜; 周志有; 孙世刚 (ELSEVIER SCIENCE INC, 2013)
      The identification of rate-determining step (RDS) is vital for understanding reaction mechanisms and designing advanced catalysts. Here, we systemically studied the H-D kinetic isotope effects (KIEs) on electrooxidation ...
    • H-infinity controller design for large flexible simulator 

      Lan, WY; Chen, YL; Zhou, DT; PUSTC; 兰维瑶 (2000)
      This paper studies robust controller design for large flexible simulator using H-infinity loop-shaping method. The model of the large flexible simulator is present, and then, a robust controller is designed by H-infinity ...