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Er^(3+)-Yb^(3+) codoped borosilicate glass for optical thermometry

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Science china(Physics,Mechanics & Astronomy) 2010年第5期53卷 848-851页

作者： FENG ZhiQing1,BAI Lan2,CAO BaoSheng1,GONG LiDong3 & DONG Bin1,4 1 school of Science,dalian nationalities university,dalian 116600,china 2 College of Electromechanical & Information Engineering,dalian nationalities university,dalian 116600,china 3 school of Chemistry and Chemical Engineering,dalian 116029,china 4 Institute of Physics,Chinese Academy of sciences,Beijing 100190,china school of Science Dalian Nationalities University Dalian China College of Electromechanical & Information Engineering Dalian Nationalities University Dalian China school of Chemistry and Chemical Engineering Dalian China Institute of Physics Chinese Academy of Sciences Beijing China

Infrared to green up-conversion emissions centered at the wavelengths of about 524 and 550 nm of the Er3+-Yb3+ codoped borosilicate glass are recorded,using a 978 nm semiconductor laser diode(LD) as an excitation *** fluorescence intensity ratio(FIR) of the green up-conversion emissions at about 524 and 550 nm in the Er3+-Yb3+ codoped borosilicate glass has been studied as a function of temperature over the temperature range of 295-873 *** maximum sensitivity and the temperature resolution derived from the FIR of the green up-conversion emissions are approximately 0.0038 K-1 and 0.2 K,*** is demonstrated that the prototype optical temperature sensor based on the FIR technique from the green up-conversion emissions in the Er3+-Yb3+ codoped borosilicate glass plays a major role in temperature measurement.

关键词： Er3+-Yb3+ codoped optical temperature sensor fluorescence intensity ratio

Farmers' Willingness-to-Pay for Environment and Human Health and Adoption of IPM

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Chinese Journal of Population,Resources and Environment 2004年第3期2卷 39-44页

作者： Zhang Juyong dalian nationalities university, dalian 116600, china dalian nationalities university Dalian 116600 China

Although chemical control of pests increases crop production, it brings a lot of damage to environment and human health. There exist a number of alternative methods that are not so harmful to environment and human health. However, whether and how much in extent these technologies adopted are plausible depends on the comparison of benefit-cost between chemical control and the alternative control methods (such as Integrated Pest Management, IPM) and farmers' willingness-to-pay (WTP) for envirorment and human health. Using contingent valuation method (CVM), the author investigates farmers' WTP for environment and human health, recognizes the factors influencing WTP, and accordingly points out the importance of pest control technology extension and government regulation of pesticides.

关键词： contingent valuation method (CVM) environment human health Willingness-to-Pay (WTP) technology adoption

Up-conversion emissions of Er^(3+)-Yb^(3+) codoped Al_2O_3 nanoparticles by the arc discharge synthesis method

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Science china(Physics,Mechanics & Astronomy) 2009年第7期52卷 1043-1046页

作者： DONG Bin1, CAO BaoSheng1, FENG ZhiQing1, WANG XingJun2, LI ChengRen3 & HUA RuiNian4 1 school of Science, dalian nationalities university, dalian 116600, china 2 school of Electronics Engineering and Computer Science, Peking university, Beijing 100871, china 3 College of Physics and Electronic Technology, Liaoning Normal university, dalian 116029, china 4 College of Life Science, dalian nationalities university, dalian 116600, china school of Science Dalian Nationalities University Dalian China school of Electronics Engineering and Computer Science Peking University Beijing China College of Physics and Electronic Technology Liaoning Normal University Dalian China College of Life Science Dalian Nationalities University Dalian China

The Er3+-Yb3+ codoped Al2O3 nanoparticles with an average particle size of about 50 nm have been synthesized by an arc discharge synthesis method. The green and red up-conversion emissions centered at about 526, 547 and 677 nm, corresponding respectively to the 2H11/2→4I15/2, 4S3/2→4I15/2 and 4 F9/2→4I15/2 transitions of Er3+, were detected by a 978-nm semiconductor laser diode excitation. The Annealing has evident effect on the up-conversion emissions of the samples: The red up-conversion emission is noticeable before annealing; however, the green up-conversion emission becomes predominant after annealing. The mixture of (Er,Yb)3Al5O12 and α-(Al,Er,Yb)2O3 phases is more favorable for green up-conversion emissions due to an enhancement of the ESA (I) of 4I11/2+a photon→4F7/2 and ET (III) of 2F5/2(Yb3+)+4I11/2(Er3+)→2F7/2(Yb3+)+4F7/2(Er3+) processes. The two-photon absorption up-conversion process is involved in the green and red up-conversion emissions. The results have proved that arc discharge synthesis is a new promising preparation technology for optical materials.

关键词： up-conversion Er3+-Yb3+ codoped Al2O3 arc discharge synthesis

A REPRESENTATION THEOREM OF THE BOUNDED REGULAR OPERATORS FROM SOME SPACE X ONTO L_1(μ)

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Journal of Systems Science & Complexity 2001年第3期14卷 265-268页

作者： MA Yumei (Department of Mathematics, dalian nationalities university, dalian 116600, china) 东北民族学院辽宁大连 116600

Suppose X is a Banash lattice, and X* has Radon-Nikodym property. Then the space R(X, L1(μ)) of all bounded regular operators is isometrically isomorphic onto L1 (μ, X). We denote R(X, L1 (μ)) L1 (μ, X).

关键词： Banach lattice order complete RNP regular operator.

Gould-Hsu Inversion Chains and Their Applications

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Journal of Mathematical Research with Applications 2012年第2期32卷 167-173页

作者： Hongmei LIU,Shuyan DING,Shuhua QI school of Science,dalian nationalities university,Liaoning 116600,P.R.china school of Science Dalian Nationalities University Liaoning 116600

In this paper,by means of Gould-Hsu inverse series relations,we establish several Gould-Hsu inversion *** consequence,some new transformation formulae as well as some famous hypergeometric series identities are derived.

关键词： Gould-Hsu inversion combinatorial identities hypergeometric series.

CAUCHY PROBLEM FOR A DEGENERATE PARABOLIC EQUATION WITH NON-DIVERGENCE FORM

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Acta Mathematica Scientia 2010年第5期30卷 1679-1686页

作者：周文书姚正安 Department of Mathematics Dalian Nationalities University Department of Mathematics Sun Yat-Sen University

In this article, it is shown that there exists a unique viscosity solution of the Cauchy problem for a degenerate parabolic equation with non-divergence form.

关键词： degenerate parabolic equation viscosity solution uniqueness existence

Functions for patch test in finite element analysis of the Mindlin plate and the thin cylindrical shell

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Science china(Physics,Mechanics & Astronomy) 2009年第5期52卷 762-767页

作者： CHEN WanJi 1,2 ,WANG JinZhi 1,3 &ZHAO Jie 1 1State Key Laboratory for Structural Analysis of Industrial Equipment,dalian university of Technology,dalian 116023,china 2Institute for Structural Analysis of Aerocraft,Shenyang Institute of Aeronautical Engineering,Shenyang 110136,china 3 College of Science,Institute of dalian nationalities,dalian 116022,china State Key Laboratory for Structural Analysis of Industrial Equipment Dalian University of Technology Dalian China Institute for Structural Analysis of Aerocraft Shenyang Institute of Aeronautical Engineering Shenyang China College of Science Institute of Dalian Nationalities Dalian China

Current patch test for Mindlin plate element only satisfies the zero shear deformation *** patch test of non-zero constant shear for Mindlin plate problem cannot be *** shell element, the patch test does not even *** on the theory of enhanced patch test proposed by Chen W J (2006),the authors proposed the enhanced patch test function for Mindlin plate and thin cylindrical shell *** enhanced patch test function can be used to assess the convergence of the Mindlin plate and cylindrical thin shell elements.

关键词： Mindlin plate thin cylindrical shell finite element enhanced patch test test function

Environment and Personal Well-being in Urban china

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Chinese Journal of Population,Resources and Environment 2011年第4期9卷 77-81页

作者： Yang Yuwen 1,2,Yang Wenya 3 1.Research Center for Circular Economy,Nankai university,Tianjin 300071,china 2.school of Business and Economics,dalian nationalities university,dalian Liaoning116600,china 3.Nottingham university Business school (china),university of Nottingham Ningbo,Ningbo Zhejiang 315100,china Research Center for Circular Economy Nankai University Tianjin 300071 China school of Business and Economics Dalian Nationalities University Dalian Liaoning116600 China Nottingham university Business school (china) University of Nottingham Ningbo Ningbo Zhejiang 315100 China

The aim of this study is to examine the relationship between environment and personal well-being using a sample of 562 urban employees from three cities in Liaoning province in the People's Republic of *** contrast to previous studies,this study controlled positive affectivity (PA),negative affectivity (NA),job satisfaction and Big Five personality *** addition,the research variables of personal well-being index (PWI),positive affectivity,negative affectivity,job satisfaction,Big Five,and environmental satisfaction are measured with multi-item *** research finds that environmental satisfaction is positively related to personal well-being,suggesting that improvement of the natural surroundings in the cities can improve people's well-being.

关键词： environment personal well-being multi-item scales

Possibility of Constitutional Design and Its Theoretical Hypothesis

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学术界 2010年第12期 250-253页

作者： Ye Xingyi College of Humanities and Law,dalian nationalities university

Human society can construct a nicer government by way of political design and constitutional design is a basic approach to realize human good and construct a nicer modern *** beings have subjectivity and politics has the characteristics of goodness,which makes constitutional design *** design would follow some theoretical hypotheses,*** of gloom consciousness of humanity and hypothesis of essential evil of power.

关键词： Constitutional design subjectivity theoretical hypothesis