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Journal of Systems science & Complexity 2011年第4期24卷 795-802页

作者： Dongyang SHI Buying ZHANG Department of Mathematics Zhengzhou University Zhengzhou 450052 China. E & A College Hebei Normal University of Science & Technology Qinhuangdao 066004 China.

The standard finite elements of degree p over the rectangular meshes are applied to solve a kind of nonlinear viscoelastic wave equations with nonlinear boundary conditions, and the superclose property of the continuous Galerkin approximation is derived without using the nonclassical elliptic projection of the exact solution of the model problem. The global superconvergence of one order higher than the traditional error estimate is also obtained through the postprocessing technique.

关键词： Nonlinear boundary conditions nonlinear viscoelastic wave equations postprocessingoperator superclose and superconvergence.

NONCONFORMING FINITE ELEMENT METHOD FOR NONLINEAR PARABOLIC EQUATIONS

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Journal of Systems science & Complexity 2010年第2期23卷 395-402页

作者： Dongyang SHI Buying ZHANG Department of Mathematics Zhengzhou University Zhengzhou 450052 China. E&A College Hebei Normal University of Science & Technology Qinhuangdao 066004 China.

A nonconforming finite element method for the nonlinear parabolic equations is studied inthis *** convergence analysis is presented and the optimal error estimate in L^2(‖·‖_h)norm isobtained through Ritz projectio... 详细信息

关键词： Nonconforming finite element nonlinear parabolic equations optimal error estimates Ritz projection.

Definition of Measure-theoretic Pressure Using Spanning Sets

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Acta Mathematicae Applicatae Sinica 2004年第4期 709-718页

作者： Lian Fa HE College of Mathematics and Information science,hebei normal university,Shijiazhuang 050016,P.R.ChinaJin Feng LV hebei normal university of science & technology,Qinhuangdao 066004,P.R.China Li Na ZHOU College of Mathematics and Information science,hebei normal university,Shijiazhuang 050016,P.R.China

We introduce a new definition of measure-theoretic pressure for ergodic measures of con-tinuous maps on a compact metric *** definition is similar to those of topological pressureinvolving spanning *** an application,for C(α>0) diffeomorphisms of a compact manifold,we study the relationship between the measure-theoretic pressure and the periodic points.

关键词： Ergodic measure Measure-theoretic pressure Spanning set

Impacts of Financial Crisis on the hebei Steel Industry and Countermeasures

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Impacts of Financial Crisis on the Hebei Steel Industry and ...

2010 Euro-Asian Winter Conference on Corporate Social Responsibility and Environmental Management

作者： LIU Xuehua 1 JIN Yingying 2 MENG Ying 31 hebei normal university of science &technology. 2 hebei normal university of science & technology. 3 hebei normal university of science & technology.

hebei is one of the largest province in terms of producing steel and iron in China, and its outputs continuously occupies the national first place for many years. However, the 2007 financial crisis has brought an unprecedented challenge to the steel industry in hebei Province. The Iron and steel export market of enterprises in hebei Province withered due to the impacts of financial crisis, which results in the reducing of foreign trade and the decreasing of selling price. In addition, the profits of steel and iron enterprises reduce, and some enterprises even bankrupt. Through conducting researches on impacts of financial crisis on the hebei steel industry, would seek its deep level reason, and then propose countermeasure to deal with it.

关键词： Financial crisis Steel industry Influence Countermeasure

On the Management of the College Capital Construction Archive

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On the Management of the College Capital Construction Archiv...

2010 International Conference on Semiconductor Laser and Photonics (ICSLP 2010)

作者： Limei Liu Archives hebei normal university of science & technology Qinhuangdao hebei China

This paper discusses how to manage college capital construction archives in accordance with the archive collection ＆ arrangement and exploitation in light of the problems in the management of college capital construc... 详细信息

关键词： college capital construction archive collection & arrangement exploitation.

Practice and Thinking of the Implementation of Undergraduate Tutorial Teaching System

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Practice and Thinking of the Implementation of Undergraduate...

2011 3rd IEEE International Conference on Information Management and Engineering(ICIME 2011)

作者： Qianqian Yang College of Education hebei normal university of science & technology Qinhuangdao China Yan Xiao College of Bussiness and Economics hebei normal university of science & technology Qinhuangdao China Wanqiu Cui College of Education hebei normal university of science & technology Qinhuangdao China Ying Meng College of Bussiness and Economics hebei normal university of science & technology Qinhuangdao China

Undergraduate tutorial teaching system is a new management model for the exploration and practice of higher *** article describes the basic methods of the implementation of the undergraduate tutorial system and theoretically analysis the significant functions of undergraduate tutorial system for improving the quality of higher education.

关键词： Undergraduate tutorial teaching system Quality of higher education Practice Thinking

Development on transparent conductive ZnO thin films doped with various impurity elements

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Rare Metals 2011年第2期30卷 175-182页

作者： ZHAO Lin SHAO Guangjie SONG Shitao QIN Xiujuan HAN Sihuizhi School of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China State Key Laboratory of Metastable Materials science and technology Yanshan University Qinhuangdao 066004 China hebei normal university of science and technology Qinhuangdao 066004 China

A general review of recent research progress in fabricating transparent conductive ZnO thin films by means of intentional doping and codoping with In, Ga, A1, Mg, Li, F, H, N, and P, divided into metals and nonmetals, is presented in this article. The main emphasis is placed on introducing and discussing the recent research achievements on the mechanisms of the incorporation of these impurities, and their effects on the electrical and optical properties. Lastly, this article concludes with a summary of the present state of investigations on doping elements in fabricating functional ZnO thin films for photoelectric applications, and with our personal view of the perspective of future studies on doped ZnO thin films.

关键词： thin films conductive films zinc oxide doping electric properties optical properties

Effects of cryogenic treatment on the thermal physical properties of Cu_(76.12) Al_(23.88) alloy

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Rare Metals 2011年第6期30卷 644-649页

作者： WANG Ping LU Wei WANG Yuehui LIU Jianhua ZHANG Ruijun State Key Laboratory of Metastable Materials science and technology Yanshan University Qinhuangdao 066004 China College of Civil Engineering andMechanics Yanshan University Qinhuangdao 066004 China Tangshan Vocational technology College Tangshan 063000 China College of Physics ＆ Chemistry Hebei Normal University of Science ＆ Technology Qinhuangdao 066004 China

The thermal diffusion coefficient, heat capacity, thermal conductivity, and thermal expansion coefficient of Cu76.12Al23.88 alloy before and after cryogenic treatment in the heating temperature range of 25℃ to 600℃ were measured by thermal constant tester and thermal expansion instrument. The effects of cryogenic treatment on the thermal physical properties of CU76,12A123,88 alloy were investigated by comparing the variation of the thermal parameters before and after cryogenic treatment. The results show that the variation trend of the thermal diffusion coefficient, heat capacity, thermal conductivity, and thermal expansion coefficient of CU76.12Al23.88 alloy after cryogenic treatment was the same as before. The cryogenic treatment can increase the thermal diffusion coefficient, thermal conductivity, and thermal expansion coeffi- cient of Cu76.12Al23.88 alloy and decrease its heat capacity. The maximum difference in the thermal diffusion coefficient between the before and after cryogenic treatment appeared at 400℃. Similarly, thermal conductivity was observed at 200℃.

关键词： Cu76.12Al23,88 alloy cryogenic treatment thermal diffusion coefficient thermal expansion coefficient

The Construction of E-Commerce Model in university Community

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The Construction of E-Commerce Model in University Community

2010 International Conference on Management science and Engineering (MSE 2010)

作者： Zhaochuan Qi Institute of Finance and Economics hebei normal university of science & technology Qinhuangdao China Qianghua Li Institute of Humanities and Law hebei normal university of science & technology Qinhuangdao China Maobao Du Institute of Finance and Economics hebei normal university of science & technology Qinhuangdao China

The development of the traditional E-commerce is limited in varying degrees by the logistics,the online payment and the credit *** some extent these problems could be resolved by developing the community E-commerce,especially the unique feature of the university community lays a foundation for the developing of the E-commerce in *** the base of the field researching and reading up some literatures,the article analyzed the significance and characteristics of the E-commerce in the university community,gave some points for the issue that construct the E-commerce model in the university community on the main participants,the information flow,the logistics and the fund flow,and provided a guideline for resolving the constraints to the traditional E-commerce.

关键词： The E-commerce in the university community.Model.Construction.

Emergence patterns and evidence for a female-produced sex pheromone of the gall midge,Obolodiplosis robiniae(Diptera:Cecidomyiidae) in Northern China

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Emergence patterns and evidence for a female-produced sex ph...

第三届中国森林保护学术大会

作者： Changkuan Lu Xiaoqin Wang Institute for Agroforest Pests Monitoring Research,hebei normal university of science & technology,hebei Province

The black locust,Robinia pseudoacacia L.,was introduced in late 19th from North America to China in order to consolidate soils and to reforest devastated areas,or as an ornamental *** 2006,a gall midge species causing leaf galls on *** was reported in several provinces in *** insect pest Was identified as Obolodiplosis robiniae(Diptera:Cecidomyiidae),a gall midge originating from North America and threats the health of ***.,belonging to quarantine pests in several provinces in

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