检索结果-南通市图书馆

An N/4 fixed-point duality quantum search algorithm

在线全文

学校读者我要写书评

暂无评论

中国科学：物理学、力学、天文学英文版 2010年第9期53卷 1765-1768页

作者： HAO Liang1,LIU Dan2 & LONG GuiLu1,3 1Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics,Tsinghua university,Beijing 100084,china 2school of sciences,dalian nationalities university,dalian 1.6600,china 3Tsinghua National Laboratory for Information Science and Technology,Beijing 100084,china 1. Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics Tsinghua University Beijing 100084 China2. School of Sciences Dalian Nationalities University Dalian 116600 China3. Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

Here a fixed-point duality quantum search algorithm is *** algorithm uses iteratively non-unitary operations and measurements to search an unsorted *** the marked item is found,the algorithm stops *** algorithm uses a constant non-unitary operator,and requires N/4 steps on average(N is the number of data from the database) to locate the marked *** implementation of this algorithm in a usual quantum computer is also demonstrated.

关键词： fixed-point search algorithm duality quantum computing the N4 duality search algorithm

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

在线全文

学校读者我要写书评

暂无评论

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 1.6600, 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 1.6600, china 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

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

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

在线全文

学校读者我要写书评

暂无评论

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 1.6600, 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

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

在线全文

学校读者我要写书评

暂无评论

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 116023 China Institute for Structural Analysis of Aerocraft Shenyang Institute of Aeronautical Engineering Shenyang 110136 China College of Science Institute of Dalian Nationalities Dalian 116022 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

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

在线全文

学校读者我要写书评

暂无评论

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 1.6600, 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.

Environment and Personal Well-being in Urban china

在线全文

学校读者我要写书评

暂无评论

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 Liaoning1.6600,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

在线全文

学校读者我要写书评

暂无评论

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

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

Gould-Hsu Inversion Chains and Their Applications

在线全文

学校读者我要写书评

暂无评论

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 1.6600,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.