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Correction of TOPEX altimeter data error and its preliminary results in application

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Chinese Science Bulletin 1997年第17期42卷 1451-1455页

作者： Zheng, dw Wu, HQ Shanghai Observatory Chinese Academy of Sciences Shanghai 200030 China

TOPEX/POSEIDON is an altimetric satellite mission jointly conducted by NASA, the US

关键词： ocean satellite altimeter instrument drift correction sea-level change.

SURFACE　INTEGRAL　OF　THREE－DIMENSIONAL　VELOCITY　FIELD　FOR　SQUARE　BAR　DRAWING　THROUGH　CONICAL　DIE

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中国有色金属学会会刊：英文版 1996年第3期6卷 131-135页

作者： Zhao, dw Guo, CW Liu, XH Fang, YK NORTHEASTERN UNIV ROLLING TECHNOL & TANDEM ROLLING AUTOMAT NATL KEY SHENYANG 110006 PEOPLES R CHINA UNIV FREIBURG INST ANGEW MATH D-7800 FREIBURG GERMANY

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关键词： square bar drawing three dimensional velocity field surface integral

Polar motion and the North Atlantic Oscillation

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Chinese Science Bulletin 1997年第11期42卷 927-931页

作者： Zhou, YH Zheng, dw Chao, BF Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China

THE motion of earth’s instantaneous rotation pole with respect to the earth crust or the mean pole of the epoch is briefly referred to as the polar *** polar motion is mainly charac-terized by the annual and Chandler polar *** data accumulation and promotion ofthe observation accuracy after the 1980s,people have extended researches of only annual

关键词： polar motion the North Atlantic Oscillation excitation function interannual time scale.

Perimeter-Area Relation and Fractal Dimension of Fracture Surfaces

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Journal of Materials Science & Technology 1997年第5期13卷 416-420页

作者： Shi, dw Jiang, J Tian, EK Lung, CW International Centre for Materials Physics Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

We have theoretically analysed the perimeter-area relation and simulated its application to measuring the fractal dimension of fracture surfaces. It is proved that the fractal dimension D obtained by slit island method (SIM) is related to the dependence of measured area A(delta) of the slit island on yardstick delta. So in some cases, the dimension D obtained by SIM is dependent on yardstick and in other cases independent on yardstick delta. But in all cases, when delta-->0 the dimension D obtained by SIM approaches the real fractal dimension (similar dimension) of 'coastline' of the island. We analysed some experimental data and found some new and interesting characteristics of crack propagation in steels.

关键词： Steel

High-level expression of human calmodulin in *** and its effects on cell proliferation

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World Journal of Gastroenterology 2000年第4期6卷 588-592页

作者： Li XJ Wu JG Si JL Guo dw Xu JP Nanjing Gen Hosp Nanjing Command Ctr Lab Med Sci Dept ImmunolPLA Nanjing 210002 Jiangsu Prov Peoples R China

Calmodulin (CaM), widely distributed in almost all eukaryotic cells, is a major intracellular calcium receptor responsible for mediating the Ca2 + signal to a multitude of different enzyme systems and is thought to play a vital role in the regulation of cell proliferative cycle[1，2]. Recently, many studies showed that CaM is also present in extracellular fluid such as cell culture media and normal body fluid and has been reported to stimulate proliferation in a range of normal and neoplastic cells, apparently acting as an autocrine growth factor[3-11]. In 1988, Crocker et al reported for the first time that addition of extracellular pure pig brain CaM could promote DNA synthesis and cell [7]proliferation in K562 human leukaemic lymphocytes[7].After that, more and more research was done on extracellular CaM and evidences demonstrated that extracellular CaM could also stimulate cell proliferation in normal human umbilical vein endothelial cells[5], keratinocytes[4], suspension-cultured cells of Angelica Dahurica, etc[6]. CaM is a monomeric protein of 148 amino acids that contains four homologous Ca2 + -binding domains. CaM has been highly conserved throughout the evolution. Only 1 out of 148 amino acids of human CaM is different from that of fish CaM. Complementary DNAs encoding rat, eel, chicken, human, and trypanosome CaM have been cloned.

关键词： calmodulin gene expression biological activity Escherichia coli cell proliferation trifluoperazine polymerase chain reaction monoclonal antibodies

Fractal Microstructure of Fracture Surfaces and Fracture Energy of Metals

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Journal of Materials Science & Technology 1997年第6期13卷 495-498页

作者： Shi, dw Jiang, J Lung, CW Liu, HZ Lou, TP Liu, HB Chinese Acad Sci Inst Met Res Int Ctr Mat Phys Shenyang 110015 Peoples R China Chinese Acad Sci Inst Met Res State Key Lab RSA Shenyang 110015 Peoples R China

Using a fractal model, we give a new interpretation of the reversed sigmoidal curves of fracture surface profile length obtained in some experiments. It is pointed out that a single parameter (fractal dimension D) is not sufficient to characterize a fractal curve completely. It is shown that the initiator length L-0 is also important to characterize a fractal curve. We have derived a formula which correlate the fracture energy with the fractal parameters of the fracture surfaces and analyzed some experimental data.

关键词： Fracture

Photochemistry of phenothiazine in benzene and cyclohexane

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Chinese Science Bulletin 1997年第12期42卷 998-1000页

作者： Wang, SH Chen, dw Gou, JX Wang, H Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

IN the last few years phenothiazine(PTH)and its derivatives have captured much attention inthe fields of medicines,biology,and microelectronic materials due to their ability to ef-ficiently photosensitize acid production in the presence of vicinal dibromides and hence tochange the solubilization of polymer *** photophysical and photochemical properties re-lated to the processes have been *** Barra et *** that the triplet

关键词： photochemistry ESR nitroxyl radical cation radical.

A Special Property of DNA--as an Electrocatalyst

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Chinese Chemical Letters 1998年第3期9卷 273-276页

作者： Pang, dw Lu, Q Zhang, M Hu, S Wang, ZL Cheng, JK Wuhan Univ Dept Chem Wuhan 430072 Peoples R China

A new special property of DNA was found. It can remarkably catalyze the electrooxidation of catecholamine neurotransmitters. The electrocatalytic activity of DNA towards catecholamine neurotransmitters can be attribut... 详细信息

关键词： DNA-modified powder microelectrodes DNA electrocatalyst catecholamine

Structure of Ag/Bi multilayers

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Chinese Science Bulletin 1997年第16期42卷 1350-1353页

作者： Zhang, M Yu, W Liu, RP He, dw Wang, WK Chinese Acad Sci Inst Phys Beijing 100080 Peoples R China Chinese Acad Sci Int Ctr Mat Phys Shenyang 110015 Peoples R China

MULTILAYERS are often formed from two elemental layers deposited alternately. In recent years, multilayer thin films have been used increasingly in both basic research and technological fields because of their specific properties in electricity, light, magnetism and mechanics as well as their high interfacial density. In many applications, one has to consider the effects arising from microstructure. If the thickness of sublayers is very small (several nanometers),multilayers may exhibit a dimensional periodic structure (modulation structure) in the

关键词： Ag/Bi multilayers interface.