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Dark respiration in the light and in darkness of three marine macroalgal species grown under ambient and elevated CO_2 concentrations

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Acta Oceanologica Sinica 2011年第1期30卷 106-112页

作者： ZOU Dinghui GAO Kunshan XIA Jianrong college of Environmental Science and Engineering South China University of Technology Guangzhou 510006 China The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education Guangzhou 510006 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China college of Environmental Science and Engineering Guangzhou University Guangzhou 510006 China

Dark respiration （non-photorespiratory mitochondrial respiration）, which occurs both in the light and in darkness, is vital for growth and survival of algae and plays a critical role in modulating the carbon balance of them. In the present study, we have investigated dark respiration in the light （RL） and in darkness （RD） in three marine macroalgal species, Hizikia fusiformis （phaeophyta）, Gracilaria lemaneiformis （Rhodophyta） and Ulva lactuca （Chlorophyta）, cultured at 20 ℃ using aeration with two CO2 conditions： current ambient （CO2 concentration about 380 μl/L） and elevated CO2 （approximately 720 μl/L） air. RL was estimated by using the Kok method, whereas RD was determined as the rate of O2 influx at zero light. The results showed that both RL and RD were unchanged for the elevated CO2-grown algae relative to ambient CO2 concentration for all the algal species tested. However, RL was significantly lower than RD across all the algal species and growth CO2 treatments, demonstrating that daytime respiration was partly depressed by the light. The percentage of inhibition of respiration by light was similar between ambient and elevated CO2- grown algae. The ratio of respiration to photosynthesis, which tended to decrease when estimated using RL instead of RD, was not altered for the elevated relative to ambient CO2 concentration. The results suggest that RL, rather than RD, is a more accurate estimate of nonphotorespiratory carbon loss in marine macroalgae during the daytime. It would not be anticipated that elevated atmospheric CO2 would exert a substantial influence on respiratory flux either in the light or in darkness in these particular marine macroalgal species.

关键词： marine macroalgae respiration CO2 carbon balance

Nonlinear Dynamic Analysis of Flexible Marine-Risers

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china Ocean Engineering 1991年第4期6卷 373-384页

作者： Chen Jiajing and Wang Dongjiao Professor, south china university of technology, guangzhou PhD Student, Hong Kong Polytechnic Formerly, south china university of technology, guangzhou

A nonlinear dynamic analysis model is estabilished on the basis of 'lumped mass' approach, which takes the influence of the fluid flow within the pipe into consideration. Numerical results are compared with the published works, and the effects of internal fluid flow, internal pressure, dyanmics as well as the nonlinear characteristics on the behavior of flexible risers are discussed. From this work, some useful conclusions are drawn.

关键词： flexible riser nonlinear dynamic analysis model irregular wave oilfield exploitation

Representation of Congruences on Regular Semigroups with Inverse Transversals

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Acta Mathematica Sinica,English Series 1999年第3期15卷 347-352页

作者： Limin Wang Xilin Tang Department of Mathematics, south china Normal university, guangzhou 510631, P. R. china Department of Mathematics, guangzhou Teacher’s college, guangzhou 510400, P. R. china Department of Mathematics South China Normal University Guangzhou P. R. China Department of Mathematics Guangzhou Teacher’s College Guangzhou P.R. China

For a regular semigroup with an inverse transversal, we have Saito’s structure W(I, S°, Λ, *, α,β). We represent congruences on this kind of semigroups by the so-called congruence assemblage which consist of congruences on the structure component parts I, S° and Λ. The structure of images of this type of semigroups is also presented.

关键词： Inverse transversal Congruence Congruence assemblage

Parameter identification theory of a complex model based on global optimization method

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Science china(Physics,Mechanics & Astronomy) 2008年第11期51卷 1722-1732页

作者： QU Jie1, JIN QuanLin2 & XU BingYe3 1 college of automotive Engineering, south china university of technology, guangzhou 510640, china 2 Beijing Research Institute of Mechanical and Electrical technology, Beijing 100083, china 3 Department of Engineering Mechanics, Tsinghua university, Beijing 100084, china college of automotive Engineering South China University of Technology Guangzhou China Beijing Research Institute of Mechanical and Electrical technology Beijing China Department of Engineering Mechanics Tsinghua University Beijing China

With the development of computer technology and numerical simulation technology, computer aided engineering (CAE) technology has been widely applied to many fields. One of the main obstacles, which hinder the further application of CAE technology, is how to successfully identify the parameters of the selected model. An elementary framework for parameter identification of a complex model is provided in this paper. The framework includes the construction of objective function, the design of the optimization method and the evaluation of the identified results, etc. The parameter identification process is described in this framework, taking the parameter identification of the superplastic constitutive model considering grain growth for Ti-6Al-4V at 927°C as an example. The objective function is the weighted quadratic sums of the difference between the experimental and computational data for the stress-strain relationship and the grain growth relationship; the designed optimization method is a hybrid global optimization method, which is based on the feature of the objective function and incorporates the strengths of genetic algorithm (GA), the Levenberg-Marquardt algorithm and the augmented Gauss-Newton algorithm. The reliability evaluation of parameter identification result is made through the comparison between the calculated and experimental results and between the theoretical values of the parameters and the identified ones.

关键词： constitutive model parameter identification theory inverse analysis global optimization

On a problem of Skiba from the Kourovka Notebook

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Science china Mathematics 2004年第1期47卷 96-103页

作者： WANG Yanming & WEI HuaquanLingnan college and School of Mathematics, Zhongshan university, guangzhou 510275, china School of Mathematics, Zhongshan university, guangzhou 510275, china Department of Mathematics, Guangxi Teacher’s college, Nanning 530001, china Lingnan college and School of Mathematics Zhongshan University Guangzhou China School of Mathematics Zhongshan University Guangzhou China Department of Mathematics Guangxi Teacher’s College Nanning China

In this paper, we give a positive answer to a recent open problem of Skiba in Kourovka Notebook without using the odd order theorem and other deep theorems. Some of the techniques are improved.

关键词： supersolvable group c-supple merited subgroup complemented subgroup generalized fitting subgroup saturated formation

New method for signal encryption using blind source separation based on subband decomposition

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Progress in Natural Science:Materials International 2008年第6期18卷 751-755页

作者： Zuyuan Yang*,Guoxu Zhou,Zongze Wu,Jinlong Zhang School of Electrics and Information Engineering,south china university of technology,guangzhou 510641,china School of Electrics and Information Engineering South China University of Technology Guangzhou 510641 China

A novel cryptosystem based on subband decomposition independent component analysis(SDICA)is proposed in this work,where no assumption of independence for the ciphers and the plaintexts is *** the proposed cryptosystem,the encryption is asynchronous,*** plaintexts are mixed mutually firstly and then mixed with the *** addition,the decryption is asynchronous,such that the decryption accuracy of the plaintexts can be *** special information about the original mixing matrix is used for solving the indeterminacy of the permutation and scale of columns of the recovered mixing matrix in SDICA,instead of the characteristics of the *** are given to illustrate security and availability of our cryptosystem.

关键词： SDICA Signal encryption BSS

ON THE INVERSE IMAGE SET OF RATIONAL FUNCTIONS

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Acta Mathematica Scientia 2007年第3期27卷 541-548页

作者：孙道椿 Department of Mathematics South China Normal University

This article studies the inverse image of rational functions. Several theorems are obtained on the Julia set expressed by the inverse image, and a mistake is pointed out in ***＇ theorem incidentally.

关键词： Rational dynamical system Julila set Fatou component

PREPARATION AND PROPERTIES OF Ni-Cr AND Fe-Cr-Al FILMS BY VACUUM EVAPORATION

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Acta Metallurgica Sinica(English Letters) 2003年第4期16卷 283-288页

作者： X.W. Shi, Z.Y. Liu, B.C. Zeng and CM. LiInstitute of Materials Science & technology, college of Mechanical Engineering, south china university of technology, guangzhou 510640, china Institute of Materials Science & technology College of Mechanical Engineering South China University of Technology Guangzhou 510640 China

Ni-Cr and Fe-Cr-Al films deposited on the Al2O3 substrate are studied by a method of vacuum evaporation in this paper. Influence of resistance value on density and evaporation parameters of the films reveals that the resistance of films and the adhesion of films to substrates are determined by the evaporation time and the substrate temperate under the condition of the maximum vacuity of 6.2×10-4 Pa, respectively.

关键词： vacuum evaporation resistance of film vacuity

Non-orthogonal joint diagonalization with diagonal constraints

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Progress in Natural Science:Materials International 2008年第6期18卷 735-739页

作者： Guoxu Zhou*,Zuyuan Yang,Zongze Wu,Jinlong Zhang School of Electrics and Information Engineering,south china university of technology,guangzhou 510641,china School of Electrics and Information Engineering South China University of Technology Guangzhou 510641 China

Joint diagonalization has attracted much attention and many algorithms have been presented so ***,some ambiguities still exist in the objective functions for joint *** this paper,some criterions are proposed to eliminate the above ambiguities at first,and then a new objective function which satisfies these criterions is *** new objective function introduces diagonal con-straints for joint diagonalization,thus the trivial and unbalance solutions are excluded *** jointly diagonalizable theorem is built to interpret the reasonableness of the new objective function and the conjugate gradient method is used to provide fast and reliable ***,non-orthogonal joint diagonalization algorithm with diagonal constraints(DDiag)is *** show that DDiag is ecient and robust.

关键词： Joint diagonalization Blind source separation Conjugate gradient method