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Regulative Function of Low Molecular Chitosan on Blood Sugar in Experimental Diabetic Rats

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生物医学工程学杂志 2005年第S1期22卷 167-168页

作者： Hua-Bing YANG Yong WU (department of Preclinical medicine, Hubei College of {2. chinese medicine, Wuhan 430061,china. department of Preclinical medicine Hubei College of Traditional Chinese Medicine Wuhan 430061 China

1 IntroductionChitosan has good action on reducing blood sugar with low poisonous side-effect. Low molecular chitosan(LMC) is the oxide of high molecular chitosan, which has water-solubility and the function of lowering blood sugar of diabetic rats. In this experiment, STZ was adopted to duplicate the model rats of Type Ⅱ diabetes mellitus, the regulative function of LMC on Type Ⅱ diabetic blood sugar was observed for further inquiry into its functionary mechanism.

关键词： STZ Regulative Function of Low Molecular Chitosan on Blood Sugar in Experimental Diabetic Rats

Variation properties of ionospheric eclipse factor and ionospheric influence factor

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Progress in Natural Science:Materials International 2005年第6期15卷 573-576页

作者： ZHAO Chunmei 1,2.*, YUAN Yunbin1, OU Jikun1 and CHEN Jinping3(1. Institute of Geodesy and Geophysics, chinese Academy of Sciences, Wuhan 430077, china.2. Graduate School of chinese Academy of Sciences, Beijing 100039, china.3. department of Precision Instrument and Mechanology, Tsinghua University, Beijing 100084, china. Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 China Graduate School of chinese Academy of Sciences Beijing 100039 China department of Precision Instrument and Mechanology Tsinghua University Beijing 100084 China

The concepts and calculation methods of ionospheric eclipse factor (IEF) and ionospheric influence factor (IFF) are further illustrated. The temporal and spacial variation properties of IEF and IFF are studied, which shows that the properties are influenced by the geographic position and season. The possibility of improving the precision of using GPS data to determine ionospheric delay based on the above variation properties is also analysed.

关键词： GPS ionospheric eclipse factor ionospheric influence factor.

Estimation of annual actual evapotranspiration from nonsaturated land surfaces with conventional meteorological data

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Science china.Earth Sciences 2004年第3期47卷 239-246页

作者： QIU Xinfa1, ZENG Yan2. MIAO Qilong1 & YU Qiang2.1. department of Geography, Nanjing Institute of Meteorology, Nanjing 2.0044, china.2. Institute of Geographic Sciences and Natural Resources Research, {2. Academy of Sciences, Beijing 100101, china department of Geography Nanjing Institute of Meteorology Nanjing 210044 China Inst. of Geogr. Sci./Nat. Rsrc. Res. Chinese Academy of Sciences Beijing 100101 China

Views diverge greatly on the relationship between actual evapotranspiration (AE) and potential evapotranspiration (PE). Penman showed that AE is determined in intensity by PE and changes proportionally as a function of PE. In contrast, Bouchet indicated that AE deter-mines PE and varies inversely with PE. Based on nearly 30 years data from 432.weather stations and 512.hydrological stations in china. the two different theories, Penman抯 assumption and Bouchet抯 complementary relationship between AE and PE, were tested on nine river basins. With data integration technique, the complementary relationship between AE and PE was dis-played entirely. A general model to estimate the actual evapotranspiration from nonsaturated surfaces by routine meteorological observations has been established on the basis of thorough analysis of the concept of PE. The results show that the calculations are all in error control of <10%, except for a few years over the Yellow River Basin.

关键词： complementary relationship of evapotranspiration, potential evapotranspiration, actual evapotranspiration.

Two possible mechanisms for vortex self-organization

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Science china.Earth Sciences 2006年第2期49卷 202-211页

作者： LUO Zhexian2. ZHOU Xiuji1 & GAO Shouting3 1. chinese Academy of Meteorological Sciences, Beijing 100081, china.2. {2. of Space Information Science, Nanjing University of Information Science and Technology, Nanjing 2.0044, china.3. Institute of Atmospheric Physics, chinese Academy of Sciences, Beijing 10002., china department of Environmental Science Nanjing University of Information Science and Technology Nanjing China chinese Academy of Meteorological Sciences Beijing China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China

The vortex self-organization is investigated in this paper by four groups of numerical experiments within the framework of quasi-geostrophic model, and based on the experimental results two types of possible mechanisms for vortex self-organization are suggested. The meso-scale to-pography may enable separated vortices to merge into a larger scale vortex; and the interaction of meso-γ and meso-β scale systems may make separated vortices to self organize a typhoon-like vor-tex circulation.

关键词： vortex, self-organization, meso-scale topography, interaction of different scales.

Analysis of the observation of particle detector inside ‘CBERS-1’ satellite under solar quiet conditions

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Science china.Technological Sciences) 2006年第3期49卷 342-357页

作者： ZOU Hong1, XIAO Zuo1, HAO Yongqiang1, ZOU Jiqing1, ZHU Wenming2. WU Zhongxiang2.& XIANG Hongwen2.1. department of Geophysics, Peking University, Beijing 100871, china.2. {2. Academy of Space Technology, Beijing 100086, china department of Geophysics Peking University

Based on the knowledge and related theory of earth’s radiation belt, the data of energetic particles observed by detectors onboard ‘CBERS-1’ satellite at a solar syn- chronous orbit were analyzed. It is proved that the observational results are in agreement with the theoretical description of the radiation belt structures. Analysis of more than 3 years’ data showed clearly that under quiet solar conditions, at a height of about 800 km the energetic particles were mainly located in three regions: northern auroral belt (40°― 80°), southern auroral belt (?40°― ?80°) and South Atlantic Geomagnetic Anomaly Re- gion (SAA). Actually, this is for the global distribution, at each longitude the latitudinal coverage is much narrower and particles are along the geomagnetic latitude of about ±60°. The species of particles in different regions and their counting rates are different. In SAA, usually both electrons and protons are observed, which should come from inner radiation belt; in polar regions only energetic electrons are observed under the quiet condition, which belongs to the outer radiation belt. The distribution of outer radiation electrons is asymmetrical for longitudes as well as northern and southern polar regions. These asymmetries can be explained with the reflecting altitudes of the mirror points of charged particles at the same L shell.

关键词： radiation-belts, energetic-particle, drift-shell, mirror-point.

Mechanisms of Cenozoic deformation in the Bohai Basin, Northeast china. Physical modelling and discussions

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Science china.Earth Sciences 2006年第3期49卷 258-271页

作者： ZHOU Jianxun1 & ZHOU Jiansheng2.1. Key Laboratory for Hydrocarbon Accumulation of chinese Ministry of Education and department of Earth Science, {2.University of Petroleum, Beijing 102.49, {2.2. Dagang Petroleum Sub-corporation of Petro{2.Company Limited, Tianjin 3002.0, china Key Laboratory for Hydrocarbon Accumulation of chinese Ministry of Education and department of Earth Science China University of Petroleum Beijing China Dagang Petroleum Sub-corporation of Petrochina.Company Limited Tianjin China

The Bohai Basin is a Cenozoic petroliferous extensional basin in china.and has apparent geometrical and kinematic similarities with the other Meso-Cenozoic extensional basins located along the eastern margin of Eurasian Plate. However, the deformation mechanisms of the basin are still in dispute. Physcial modelling referring to the Huanghua Depression, located in the central part of the Bohai Basin was conducted employing four sets of planar sandbox experimental models with different extension directions. Only experimental results of the model with N-S extension show good structural similarity with the depression. The results also indicate that complex variations of fault strike in a rift basin are not necessarily the results of complex kinematic mechanisms or polyphase deformation. Based on comparison of experimental results with the actual structures and the good structural simi- larity between Huanghua Depression and the whole Bohai Basin, it is concluded that the Bohai Basin was formed by the N-S extension. The strike slip deformation along the NNE-trending border faults of the basin resulted from the N-S extension and played the role of lateral transformation for the N-S extension. In addition, according to the apparent geometrical and kinematic similarities among the Bohai Basin and other Meso-Cenozoic extensional basins located along the eastern margin of the Eurasian Plate, it is proposed that: (1) this “N-S extension” model provides a better kinematic inter- pretation for the formation of Bohai Basin and the other adjacent basins located along the eastern margin of the Eurasian Plate; and (2. the N-S extension was probably the effect of the “slab window” formed by the subduction of the nearly E-W trending oceanic ridge between the Kula and Pacific Plates. The “slab window” effect can also provide reasonable explanations for the phenomena that initial rifting ages of basins become progressively younger westwards along the eastern margin of the Eurasian Plate

关键词： Bohai Basin, physical modelling, Cenozoic, extensional tectonics.

Anisotropic effect on the vibronic reduction factors

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chinese Science Bulletin 2006年第21期51卷 2553-2558页

作者： QIU Qing-chun1,2.& QIAO Fen1,2.1. department of Physics and IT, Medical College, Shantou University,Shantou 515041, china.2. department of Physics, Shantou University, Shantou 515063, china department of Physics and IT Medical College Shantou University Shantou 515041 China department of Physics Shantou University Shantou 515063 China

The reduction factors p and q defined by Ham in the Ee JT system and their relation 2.-p=1 have been well accepted and the concept of reduction factors is widely used in the studies of vibronic coupling. However, when the system is under the anisotropic conditions, the reduction factors and their relation will change accordingly. The first-order reduction factors p and q of Ee system were further studied using the method of unitary transformation here. The relation between p and q proposed by Ham was investigated under both conditions of the linear coupling and the anisotropic effects. The result demonstrated that the relation of 2.-p=1 was only correct for the linear vibronic coupling, but not correct when the anisotropic effect was considered. This result suggested that the anisotropic effect influence considerably the reduction factors, and hence the physical properties of materials. Our method could be also applied to other JT systems, especially the highly symmetric JT systems involving C60 molecules.

关键词：电子振动耦合声子交迭 Jahn-Teller效应各向异性

Numerical simulations of magnetic reconnection in the lower solar atmosphere

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Research in Astronomy and Astrophysics 2011年第2期11卷 225-236页

作者： Xiao-Yan Xu 1,2.Cheng Fang 2.Ming-De Ding 2.and Dan-Hui Gao 2.1 Purple Mountain Observatory,chinese Academy of Science,Nanjing 2.0008,china.2.{2. of Astronomy,Nanjing University,Nanjing 2.0093,china Purple Mountain Observatory Chinese Academy of Science department of Astronomy Nanjing University

Observations indicate that Ellerman bombs （EBs） and chromospheric microflares both occur in the lower solar atmosphere,and share many common features,such as temperature enhancements,accompanying jet-like mass motions,short life-time,and so *** strongly suggest that EBs and chromospheric microflares could both probably be induced by magnetic reconnection in the lower solar *** gravity,ionization and radiation considered,we perform two-dimensional numerical simulations of magnetic reconnection in the lower solar *** influence of different parameters,such as intensity of the magnetic field and anomalous resistivity,on the results are *** result demonstrates that the temperature increases are mainly due to the joule dissipation caused by magnetic *** spectral profiles of EBs and chromospheric microflares are calculated with the non-LTE radiative transfer theory and compared with *** is found that the typical features of the two phenomena can be qualitatively reproduced.

关键词： Sun: chromosphere-- Sun: photosphere -- Sun: magnetic reconnection-- Sun: numerical simulation

Boundedness of solutions and existence of invariant tori for generalized pendulum type equation

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chinese Science Bulletin 1997年第20期42卷 1673-1675页

作者： HUANG Hai and YUAN Rong1. Institute of Mathematics, chinese Academy of Sciences, Beijing 100080, china.2. {2. of Mathematics, Beijing Normal University, Beijing 100875, china Institute of Mathematics Chinese Academy of Sciences Beijing China department of Mathematics Beijing Normal University Beijing China

MOTIVATED by various significant applications to non-Newtonian fluid theory, diffusion offlows in porous media, nonlinear elasticity, and theory of capillary surfaces, several authors(see refs.[1,2. and references cited therein ) have recently studied the existence of periodicsolutions and other properties for the following differential equation:

关键词： boundeduess of solutions invariant tori quasiperlodic solutions Moser’s small twist theorem.