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UU_* filtering of nighttime net ecosystem CO_2 exchange flux over forest canopy under strong wind in wintertime

Science china Earth sciences 2005年第Z1期48卷 85-92页

作者： ZHANG Junhui, HAN Shijie, SUN Xiaomin & TANG Fengde Institute of Applied Ecology, Chinese Academy of sciences, shenyang 110016, china Institute of Geographic sciences and Natural Resources Research, Chinese Academy of sciences, Beijing 100101, china department of environment and life sciences, liaoning university, shenyang 110036, china Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China department of environment and life sciences Liaoning University Shenyang 110036 China

The mechanism of the negative nighttime net CO2 flux in wintertime and reasonable treatment with it is of great importance in evaluating the carbon metabolism of boreal forest. Results, based on the data obtained with open-path eddy covariance system and CO2 profile measurement system from Nov. 2002 to Apr. 2003 and that obtained with five sonic anemometers in Nov. 1999, show that (1) the negative net ecosystem CO2 exchange flux (NEE) always appeared under conditions of strong wind; (2) the pressure fluctuation and horizontal advection flow are dominantly responsible for the negative NEE. Operable upper bound u* filtering method (UU* filtering) was introduced since the difficulties in real-time measuring of pressure fluctuation and horizontal advection fluxes under conditions of strong wind. Nighttime upper u*. threshold for the broad-leaved Korean pine mixed forest of the Changbai Mountains is 0.4 ms-1 and can be applied to the daytime filtering; and (3) the UU* filtering corrected the nighttime 'problem' of negative NEE under strong wind and made the estimates more ecologically reasonable.

关键词： night in wintertime negative NEE eddy-covariance pressure fluctuation UU. filtering

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BINDING　ENERGY　OF　THE　SHALLOW　DONOR　IN　（CdTe）_m／（ZnTe）_n　STRAINED　DOUBLE　QUANTUM　WELL

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Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 103-108页

作者： XING Jinhai(department of Physics,liaoning university,shenyang 110036,china)HUANG Heluan(department of Electronic Science and Engineering,liaoning university,110036,china) liaoning Univ Shenyang China

In this paper the binding energy of the *** in CdTe/ZnTe strained double quantum well was *** effect of the finite well potential and strain,resulting from the lattice mismatch,on the binding energy of the impurity is included in a variational *** binding energy is obtained as a function of the well width,barrier width,and impurity position in the barrier by using a variational *** result of the present calculation shows that the variational law of the binding energy is similar to that of unstrained materials.

关键词： binding energy shallow donor strained double quantum well CdTe ZnTe

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On the group with the same orders of Sylow nor-malizers as the finite projective special unitary group

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Science china Mathematics 2004年第6期47卷 801-811页

作者： Bl Jianxingdepartment of Mathematics, liaoning university, shenyang 110036, china 1. department of Mathematics Liaoning University 110036 Shenyang China

In this paper we prove that a finite group G is isomorphic to the finite projective special unitary group U n (q) if and only if they have the same order of Sylow r-normalizer for every prime r.

关键词： unitary group Sylow subgroup normalizer

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Spontaneous Transverse Pattern Formation in a Nonlinear Optical Medium with Feedback Mirror

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Communications in Nonlinear Science and Numerical Simulation 1998年第1期3卷 39-43页

作者： Luchuan WANG, Qinliang FAN (department of Physics, liaoning university, shenyang, 110036, china) department of Physics Liaoning University Shenyang 110036 China

ＩｎｔｒｏｄｕｃｔｉｏｎＳｐｏｎｔａｎｅｏｕｓｔｒａｎｓｖｅｒｓｅｐａｔｅｒｎｓｈａｖｅｂｅｅｎｐｒｅｄｉｃｔｅ［１］ａｎｄｏｂｓｅｒｖｅｄ［２］．Ａｒａｔｈｅｒｓｉｍｐｌｅａｒｒａｎｇｅｍｅｎｔｃｏｎｓｉｓｔｉｎ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＳｐｏｎｔａｎｅｏｕｓｔｒａｎｓｖｅｒｓｅｐａｔｅｒｎｓｈａｖｅｂｅｅｎｐｒｅｄｉｃｔｅ［１］ａｎｄｏｂｓｅｒｖｅｄ［２］．ＡｒａｔｈｅｒｓｉｍｐｌｅａｒｒａｎｇｅｍｅｎｔｃｏｎｓｉｓｔｉｎｇｏｆａｔｈｉｎＫｅｒ－ｓｌｉｃｅ...

关键词： spontaneous transverse pattern formation amplitude modulation phase modulation

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Dark Spatial Soliton Interaction in Nonlinear Kerr Medium

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 263-266页

作者： Luchuan WANG and Qinliang FAN (department of Physics, liaoning university, shenyang 110036, china) department of Physics Liaoning University Shenyang 110036 China

The dark spatial soliton interaction in nonlinear Kerr medium has been studied in this paper. The problem has been solved by the use of the slowly varyingenvelope approximation in solving coupled nonlinear Schrodinger equations. The perturbation nature of dark spatial soliton interaction has been described and some of their key properties has been discussed as well in the paper.

关键词： dark spatial soliton coupled nonlinear Schrodinger equations(NSE) slowly varying envelope approximation.

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BINDING ENERGY OF SHALLOW DONOR IN In_xGa_(1-x)As/GaAsSTRAINED QUANTUM WELL

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Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 88-92页

作者： J. H. Xing(department of Physics, liaoning university, shenyang 110036, china)H.L. Huang(department of Electronic Science and Engineering, liaoning university, shenyang 110036, china) liaoning Univ Shenyang China

The effect of the dielectric mismatch between the well and the barrier materials on the binding energies of shallow donor has been investigated in Inx Ga1-xAs/GaAsstrained quantum well. The binding energies as a function of the well widths and impurity positions in the well and the barriers are obtained by using a variational method. Calculation results show that the effect of the dielectric mismatch is quite sizable and such effect is larger for off-center impurity positions,but the effect of the lattice mismatch is small in general.

关键词： quantum well shallow donor binding energy

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Realization of Fixed Point Sets

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Acta Mathematica Sinica,English Series 1996年第1期12卷 71-76页

作者： Zhao Xuezhi department of Mathematics liaoning university shenyang, 110036 china liaoning university

Let f: X→X be a selfmap of a compact connected polyhedron, and A a nonempty closed subset of X. In this paper, we shall deal with the question whether or not there is a map g: X→X homotopic to f such that the fixed point set Fixg of g equals A. We introduce a necessary condition for the existence of such a map g. It is shown that this condition is easy to check, and hence some sufficient conditions are obtained.

关键词： Fixed point sets Nielsen number Local cut points Jiang group

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Non-equilibrium Thermodynamic Analysis of The Transport Properties of Formed-in-Place Zirconium (Ⅳ) Hydrous Oxide-Polyacylate Membranes in aqueous NaNO_3 solution

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Chinese Chemical Letters 1998年第9期9卷 867-868页

作者： Jia Zhen YANG (department of Chemistry, liaoning university, shenyang 110036) department of Chemistry Liaoning University Shenyang 110036 China

Nanofiltration of aqueous NaNO3 solution with a dynamically formed Zr(IV) hydrousoxide-PAA membrane is presented. The practical transpoft coefficients Lp, σ, ω were obtainedusing relationships of the non-equilibrium... 详细信息

关键词： non-equilibrium thermodynamics dynamically formed membrane electrolytenanofiltration

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Electrolytic Sampling from Pure Copper and Common Brasses Ⅰ: Calculation of the Mass Dissolved from the Samples according to Faraday's Law

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Chinese Chemical Letters 1997年第2期8卷 167-170页

作者： Jin ZHANG Jian-Nan YANG(Chemistry department, liaoning university, shenyang, 110036) Chemistry department Liaoning University Shenyang 110036 China

In a procedure for electrolytic dissolving pure copper and common brasses, the approximate electrochemical mole mass(k) of the sample was determined in accordance with the brand of the sample, a stitable electrolyte was selected to make the current efficiency equal to 100%, and then the dissolved mass of samples was calculated according to Faraday's law(m=klt).Three representative samples were sampled by the electrolytic dissolution method and the calculated dissolved amounts were equal to the values by weighing the *** cxperimental results of zinc and copper in the anode liquor are in agreement with certified values.

关键词： Mass Electrolytic Sampling from Pure Copper and Common Brasses Calculation of the Mass Dissolved from the Samples according to Faraday’s Law

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Synthesis and Structural Determination of Nine-Coordinate K[Gd~Ⅲ(edta)(H_2O)_3]·5H_2O

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Rare Metals 2001年第4期20卷 224-229页

作者： Jun Wang, Xiangdong Zhang, Damin Fan, Xiao Ling department of Chemistry, liaoning university, shenyang 110036, china 辽宁大学辽宁沈阳 110036

The title complex K [Gd~Ⅲ(edta)(H_2O)_3]·5H_2O was synthesized, where edta denotes ethylenediamine- tetraacetic acid. The crystal and molecular structure of the complex were determined by single-crystal X-ray structure analysis. The crystal belongs to an orthorhombic crystal system and an Fdd2 space group. The complex anion [Gd~Ⅲ(edta)(H_2O)_3] has a pseudo-monocapped square antiprismatic nine-coordinate structure in which six coordinate atoms (two N and four O) are from an edta ligand and three water molecules coordinate to Gd~Ⅲ ion directly. It can be predicted that Gd~Ⅲ ion can also form a nine-coordinate complex with ttha (triethylenetetraminehexaacetic acid) li- gand, so the GdⅢ complex anion [Gd~?é¨(r)(Httha)]~￡¨2-￡(c) can supply a free non-coordinate carboxyl group (-C-CH_2COOH) used for molecular embellishment in some biological molecules to form a contrast agent of Magnetic Resonance Imagine (MRI) with targeting function.

关键词： Gd~Ⅲ ethylenediaminetetraacetate (edta) complex structure

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