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An analysis on the evolvement processes of lake eutrophication and their characteristics of the typical lakes in the middle and lower reaches of yangtze River

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Chinese Science Bulletin 2006年第13期51卷 1603-1613页

作者： CHENG Xiaoying1,2.3.& LI Shijie1 1. Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 2.0008, China 2. The Key Laboratory of Industrial biotechnology, Ministry of Educa- tion,{2., wuxi 2.403., China {3.,{2., wuxi 2.403., China Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing China The Key Laboratory of Industrial biotechnology Ministry of Education Southern Yangtze University Wuxi China school of biotechnology Southern Yangtze University Wuxi China

According to the study on the aquatic environment of the typical lakes in the middle and lower reaches of yangtze River, lake eutrophication is a process in which the lake ecosystem degenerates, resulting in the deterioration of the water quality due to the enrichment of the nutrients. Moreover, the succession of lake ecosystem and change of water quality both couple well with the evolvement of tro- phic state. Then the conceptual model is mentioned and ten lake states are classified. Based on these, the authors analyzed the eutrophication processes of the typical lakes in the middle and lower reaches of yangtze River. The large lakes with taking in - send- ing out water typical of Poyang Lake evolve from State 1 before the 1980s into State 2.after the 1980s, the large and medium lakes typical of Taihu Lake evolve from State 1-2.in the 1960s into State 8 in the 1980s then into State 9 in the 1990s, the medium and small shallow lakes typical of Honghu Lake evolve from State 1 in the 1960s into State 2.after the 1980s and the small city (suburban) lakes typical of Donghu Lake evolve from State 2.in the 1960s into State 9 after the 1970s. Further, the 1980s is the key con- version period of the lakes of various types typical of Poyang Lake, Honghu Lake and Taihu Lake con- verting into mesotrophic state, the 1990s is that of Taihu Lake into eutrophic state and the 1970s is thatof the small city (suburban) lakes typical of Donghu Lake into eutrophic state. The series of nutrient evolvement of different typical lakes are similar, but the processes are not synchronous, which is related to the various human and natural driving mechanisms in lake basins.

关键词：长江湖泊富营养化概念模型转变时期驱动机制

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Study on the electric double layer of a cylindrical reverse micelle with functional theoretical approach

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Science China Chemistry 2006年第3期49卷 219-224页

作者： WANG Zhengwu1,2. GUO Baomin2. ZHANG Gexin1 & YU Huixin1 1. Key Laboratory of Industrial biotechnology of Ministry of Education, southern yangtze university,{2., China 2. {3. of Chemical and Material Engineering, southern yangtze university,{2., China 1. Key Laboratory of Industrial biotechnology of Ministry of Education Southern Yangtze University Wuxi 214036 China 2. school of Chemical and Material Engineering Southern Yangtze University Wuxi 214036 China

The iterative method in functional analysis is applied to looking for asolution of the Poisson-Boltzmann equation in order to describe the problems of the distribution ofthe potentials in the electric double layer (EDL) inside the water pool for a cylindrical inversemicelle. Potentials as a function of the position of a particular point in EDL are computed, whichdisplay a quantitative agreement with those from earlier calculation of Debye and Huckel in the caseof low potentials. But it is also shown that in the higher-potential range the iterativecalculations can give more accurate results. These results indicate the utility of this functionalanalysis technique in the description of the properties of EDL for a cylindrical inverse micelle.

关键词： cylindrical reverse micelle, electrostatic double layer, Poisson-Boltzmann equation, functional analytic theory.

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灵光独耀:沈宗灵与中国法理学

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中国法律评论 2024年第4期 149-154页

作者： Peking university Law school 北京大学法学院

在其诸多弟子的追忆中,沈宗灵先生一生专心治学、淡泊名利,由此常常对世事保持一种有意的疏离。“灵光独耀,迥脱根尘”,或许便是这位法理学大家的灵魂写照。壹“经国济民”:沈宗灵的早年岁月192.0}2.2.日,沈宗灵出生于浙江杭州的一个... 详细信息

在其诸多弟子的追忆中,沈宗灵先生一生专心治学、淡泊名利,由此常常对世事保持一种有意的疏离。“灵光独耀,迥脱根尘”,或许便是这位法理学大家的灵魂写照。壹“经国济民”:沈宗灵的早年岁月192.0}2.2.日,沈宗灵出生于浙江杭州的一个商人家庭,后随家人迁居上海。

关键词：沈宗灵淡泊名利法理学浙江杭州灵光

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A method to calculate and counterbalance the inertia force of slider-crank mechanisms in high-speed presses

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Journal of Pharmaceutical Analysis 2009年第3期21卷 141-148页

作者： Jun Wang1 ,Sheng-dun Zhao1 ,Hu-shan Shi1 ,Chun-jian Hua2.. school of Mechanical Engineering,Xi’an Jiaotong university,Xi’an 710049 2. school of Mechanical Engineering,{3. yangtze university,wuxi 2.412.,China. school of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China school of Mechanical Engineering Southern Yangtze University Wuxi 214122 China

A new method to calculate and counterbalance the inertia force of slider-crank mechanisms in high-speed mechanical presses was put forward. By analyzing the kinematic characteristics of a center-located slider-crank mechanism whose crank rotates at a constant angular velocity,the kinematic parameters of the slide,connecting rod and crank were formulated approximately. On the basis of the results above,three inertia forces and the input moment in the mechanism during its idle running were investigated and formulated by dynamic analysis. A verification experiment was performed on a slider-crank mechanism at a high-speed press machine. The forces derived from the established formulas were compared respectively with those obtained by the ADAMS software and the classical method of connecting rod mass substitution. It was experimentally found that the proposed formulas have an improved performance over related earlier techniques. By use of these results,a 1 000 kN 1 2.0 rpm four-point high-speed press machine was designed and manufactured. The slide of this press is driven by four sets of slider-crank mechanisms with symmetrical layout and opposite rotation directions to counterbalance the horizontal inertia forces. Four eccentric counterbalance blocks were designed to counterbalance the vertical force after their mass and equivalent eccentric radius were formulated. The high-speed press machine designed by the proposed counterbalance method has worked with satisfactory performance and good dynamic balance for more than four years in practical production.

关键词： slider-crank mechanism kinematics inertia force counterbalance high-speed press

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The regular representation and regular covariant representation of crossed products of Woronowicz C^(*)-algebras

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Science China Mathematics 2005年第9期48卷 1245-1259页

作者： ZHANG Xiaoxia~(1,2. & GUO Maozheng~(1,3. 1. school of Mathematical Sciences,Peking {2.,Beijing 100871,China 2. Department of Mathematics,Yantai {2.,Yantai 2.4005,China 3. LMAM,Peking {2.,Beijing 100871,China 1. school of Mathematical Sciences Peking University 100871 Beijing China 2. Department of Mathematics Yantai University 264005 Yantai China 3. LMAM Peking University 100871 Beijing China

In this paper,it is shown that the regular representation and regular covariant representation of the crossed products A×α G correspond to the twisted multiplicative unitary operators,where A is a Woronowicz C~*-algebra acted upon by a discrete group ***,it is also shown that the regular covariant C~*-algebra is the Woronowicz C~*-algebra which corresponds to a multiplicative ***,an explicit description of the multiplicative unitary operator for C(SU_q(2. )×α (?) is given in terms of those of the Woronowicz C~*-algebra C(SU_q(2. ) and the discrete group G.

关键词： multiplicative unitary operator, Woronowicz C*-algebra, crossed product.

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Electron transfer and interfacial behavior of redox proteins

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Science China Chemistry 2010年第4期53卷 720-736页

作者： ZHOU NanDi1,2. CAO Ya1 & LI GenXi1,3.1State Key Laboratory of Pharmaceutical biotechnology Department of Biochemistry, Nanjing {2., Nanjing 2.0093. China 2.ey Laboratory of Industrial biotechnology, Ministry of Education {3. of biotechnology, Jiangnan {2., wuxi 2.412., China 3.aboratory of Biosensing Technology, {3. of Life Sciences, Shanghai {2., Shanghai 2.0444, China 1. State Key Laboratory of Pharmaceutical biotechnology Nanjing University Nanjing 210093 China2. Key Laboratory of Industrial Biotechnology Ministry of Education Jiangnan University Wuxi 214122 China4. Department of Biochemistry Nanjing University Nanjing 210093 China5. School of Biotechnology Jiangnan University Wuxi 214122 China3. Laboratory of Biosensing Technology School of Life Sciences Shanghai University Shanghai 200444 China

This paper reviews the recent progress in the electron transfer and interfacial behavior of redox proteins. Significant achievements in the relevant fields are summarized including the direct electron transfer between proteins and electrodes, the thermodynamic and kinetic properties, catalytic activities and activity regulation of the redox proteins. It has been demonstrated that the electrochemical technique is an effective tool for protein studies, especially for probing into the electron transfer and interfacial behavior of redox proteins.

关键词： electron transfer interfacial behavior redox protein protein electrochemistry electroanalysis

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A computer simulation of nucleation and growth of thin films

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Science China(Physics,Mechanics & Astronomy) 2004年第4期47卷 442-451页

作者： ZHENG Xiaoping1,ZHANG Peifeng2.HE Deyan2.LIU Jun2. MA Jiantai3.1. Key Laboratory of Opto-Electronic Technology and Intelligent Control, Ministry of Education, Lanzhou Jiaotong university, Lanzhou 73.070, China 2. school of Physical Science and Technology, Lanzhou university, Lanzhou 73.000, China 3. school of Chemistry and Chemistry Engineering, Lanzhou university, Lanzhou 73.000, China 1. Key Laboratory of Opto-Electronic Technology and Intelligent Control Ministry of Education Lanzhou Jiaotong University 730070 Lanzhou China 2. school of Physical Science and Technology Lanzhou University 730000 Lanzhou China 3. school of Chemistry and Chemistry Engineering Lanzhou University 730000 Lanzhou China

A three-dimensional kinetic Monte Carlo technique has been developed for simulating the nucleation and growth of thin films. This model involves incident atom attachment, surface diffusion of the atoms on the growing surface and atom detachment from the growing surface. It takes some new effects into account, such as a significant improvement in calculation of activation energy for the atom diffusion, which renders the model more reasonable. In addition three optimum temperatures and the consistency of their dependence on deposition rate have been found out; the dependence of the surface roughness and relative density on the deposition rate has been discussed; and the approximation of freezing neighbour atoms and periodic boundary conditions has been applied.

关键词： Monte Carlo, thin film, nucleation, surface roughness, relative density.

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Zhang-Xuan thermal uplift and its genesis

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Progress in Natural Science:Materials International 2005年第8期15卷 725-732页

作者： SHAO Ji'an1*, NIU Shuyin2. ZHANG Lüqiao3.and LI Hongyang2.1. school of Earth and Space Sciences, Peking {2., Beijing 100871, China 2. Shijiazhuang {2. of Economics, Shijiazhuang 05003., China 3. Geological Bureau of Inner Mongolia, Huhhot 01002., China) school of Earth and Space Sciences Peking University Beijing 100871 China. Shijiazhuang university of Economics Shijiazhuang 050031 China. Geological Bureau of Inner Mongolia Huhhot 010020 China

Based on the researches of the Mesozoic thermal evolution history, the deformed structures, and fission track analysis of the Zhangjiakou-Xuanhua area, we obtained the following knowledge: the area experienced in 140 Ma an underplating which is marked by emplacement of mantle derived magma; during 13.—110 Ma a series of eruptions and intrusions happened, and during 80—10 Ma a rising process occurred which is synchronous with the adjacent Taihang and Yanshan Mountains and was accompanied by a series of structures down slipping from the just formed Zhang-Xuan uplift toward its periphery. Combining the Zhang-Xuan thermal lift with the large detachment structure in Baoding depression of the North China Basin in the Late Mesozoic confirms that an even larger extensional tectonic background existed in North China during this period.

关键词： Zhang-Xuan area underplating thermal uplift fission track extensional structure.

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On the Symmetry Classes of Functions

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Wuhan university Journal of Natural Sciences 2005年第5期10卷 813-816页

作者： ZHU Ping~1,2. FAN Yun~3.1. school of Mathematics and Statistics, Wuhan {2., Wuhan 43.072. Hubei, China 2. school of Science, Beijing {2. of Posts and Telecommunications, Beijing 100876, China 3. school of Mathematics and Statistics, Huazhong Normal {2., Wuhan 43.079, Hubei, China Wuhan university School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Beijing university of Posts and Telecommunications School of Science Beijing China (GRID:grid.31880.32) Huazhong Normal university School of Mathematics and Statistics Wuhan Hubei China (GRID:grid.411407.7) (ISNI:***)

Let R be an integral domain of characteristic zero such that the corresponding group rings have block decompositions. We first prove that the submodule consisting of all the R-valued ξi-symmetric functions of several variables is a symmetry class, where ξi is any block character. Then we present a relationship among certain operators introduced for block character. Then we present a relationship among certain operators introduced for block characters. As a consequence, we obtain a decomposition of an arbitrary R-valued function of several variables. Finally, we describe the symmetry property of such summands and determine all the symmetry classes.

关键词： symmetry class strict symmetry class blockcharacter ξi-symmetric function block idempotent

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Partial Rescue of pos5 Mutants by YEF1 and UTR1 Genes in Saccharomyces cerevisiae

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Acta Biochimica et Biophysica Sinica 2006年第5期38卷 293-298页

作者： Yong-Fu LI~1 Feng SHI~(2.)1 school of Food Science and Technology2.The Key Laboratory of Industrial biotechnology,Ministry of Education,{2. {3. university.wuxi 2.403.,China school of Food Science and Technology and2 The Key Laboratory of Industrial BiotechnologyMinistry of EducationSouthern Yangtze UniversityWuxi 214036China

Three NAD kinase homologs,encoded by UTR1,POS5 and YEF1 genes,are found in the yeastSaccharomyces cerevisiae and proven to be important sources of NADPH for the ***5p,existing in themitochondrial matrix,is critical for higher temperature endurance and mitochondrial functions,such asglycerol usability and arginine *** constructing the high-copy expression plasmids ofYEF1 and UTR1,which contained the green fluorescent protein reporter tag at their 3. terminus,and introducingthem into POS5 gene deletion mutants(***5,utr1pos5,yef1pos5 and utr1yef1pos5),the high-copy YEF1and UTR1 plasmids carrying transformants for pos5 mutants were *** temperature sensitivityand growth phenotype on media with glycerol as the sole carbon source,or on media without arginine,*** showed the partial rescue of mitochondrial dysfunctions and temperature sensitivity ofpos5 mutants by the high-copy YEF1 gene,and of glycerol growth defect and temperature sensitivity by thehigh-copy UTR1 gene,which confirmed the potential supplying ability of Yeflp and Utrlp for mitochondrialNADP(H)and implied the weak transport of NADP from cytosol to ***,even throughthe green fluorescent protein reporter label,the subcellular localization of Yef1p and Utr1p in yeast cells couldnot be observed,which indicated the low expression level of these two NAD kinase homologs.

关键词： NAD kinase Saccharomyces cerevisiae mitochondrial function temperature sensitivity subcellular localization

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