检索结果-南通市图书馆

Systems Science and Mathematical Sciences 1998年第4期11卷 321-326页

作者： CHEN Zhanfeng(Department of Statistics, Shanghai university Of Finance and economics, Shanghai {2.0433,{{2.)XU Duan(Department Of Statistics, Hebei university Of economics and aide, shijiazhuang 050061,{{2.)

Major efficiency is an efficiency theory of multiobjective programming, whichis based on the law of majority. For the case that the feasible region is a finite set, paper [3]gave a comparison-number method for finding major efficient solutions and major *** paper represents a new method to solve the same problem. The new method isbased on a concept of efficient equivalence point set. We give the definition of efficientequivalence point set, discuss the relationship between it and major efficiency, and presenta new approach to find major efficient (optimal) solutions.

关键词： Multiobjective programming efficiellt equivalence point set major efficientsolution major optimal solution

Lyapunov exponents for continuous random transformations

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2010年第2期53卷 413-424页

作者： ZHU YuJun & ZHANG JinLian College of Mathematics and Information Science, Hebei Normal university, shijiazhuang 050016,{{2. 1. College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China

In this paper, the concept of Lyapunov exponent is generalized to random transformations that are not necessarily differentiable. For a class of random repellers and of random hyperbolic sets obtained via small pertur... 详细信息

关键词： random transformation Lyapunov exponent multiplicative ergodic theorem random repeller random hyperbolic set

Optimal controlled teleportation via several kinds of three-qubit states

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1529-1556页

作者： GAO Ting1,2. YAN FengLi2.3 & LI YouCheng3 1 College of Mathematics and Information Science, Hebei Normal {2., shijiazhuang 050016,{2. 2.Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany 3 College of Physics and Information Engineering, Hebei Normal {2., shijiazhuang 050016,{2. College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1 D-85748 Garching Germany College of Physics and Information Engineering Hebei Normal University Shijiazhuang 050016 China

The probability of successful controlled teleportation of an unknown qubit using a general three-particle state is investigated. The analytic expressions of maximal probabilities via several kinds of tripartite states... 详细信息

关键词： controlled teleportation three-qubit state maximal probability

Impact Factors of Energy Productivity in china: An Empirical Analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Population,Resources and Environment 2007年第2期5卷 28-33页

作者： Wei Chu1,2. Shen Manhong2.1. College of {2. and Management, Zhejiang Sci-Tech university, Hangzhou Zhejiang 310018,{2. 2. College of {2., Zhejiang university, Hangzhou Zhejiang 310017,{2. College of economics and Management Zhejiang Sci-Tech University Zhejiang 310018 Hangzhou China College of economics Zhejiang University Zhejiang 310017 Hangzhou China

This article developed a decomposition model of energy productivity on the basis of the economic growth model. Four factors were considered which may influence china’s energy productivity according to this model: technology improvement, resource allocation structure, industrial structure and institute arrangement. Then, an econometric model was employed to test the four factors empirically on the basis of china’s statistical data from 1978 to {2.04. Results indicated that capital deepening con- tributes the most ({2.7%) to energy efficiency improvement, and impact from labor forces (13%) is the weakest one in resource factor; industrial structure (7%) and institute innovation (9.5%) positively improve the energy productivity.

关键词： energy productivity impact factor economic growth china

DISSOLUTION EQUILIBRIUM OF Mg VAPOUR IN LIQUID Fe

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1991年第9期4卷 230-233页

作者： ZHANG Xiaodong HAN Qiyong university of Science and Technology Beijing,Beijing,chinaCHEN Dong Hebei Institute of Metallurgy,{{2.,china Univ of Science and Technology Beijing Beijing China

The dissolution equilibrium of magnesium vapour in liguid Fe has been studied in a two-tem- perature-zone furnace at 1600℃ by use of the vapour pressure *** equilibrium con- stant for the reaction Mg_(g)=[Mg] and the... 详细信息

关键词： liquid Fe Mg dissolution equilibrium

Non-isothermal decomposition kinetics and lifetime of Tb2.0-MBA)6(PHEN)2

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2003年第3期22卷 155-159页

作者： ZHANGJianjun BAIJihai WANGRuifen WANGShuping LIJibiao ExperimentalCenter NormalUniversityShijiazhuang050016China DepartmentofComputer HebeiNormalCollegeofScienceandTechnologyChangli066600China DepartmentofChemistry HebeiNormalUniversityShijiazhuang050091China

The thermal decomposition of Tb_2.O-MBA)_6(PHEN)_2.(O-MBA: o-methylbenzoate;PHEN: 1,10-phenanthroline) and its kinetics were studied under the non-isothermal condition bythermogravimetry-derivative thermogravimetry (TG-DTG) techniques. Kinetic parameters were obtainedfrom analysis of TG-DTG curves by the Achar method and the Madhusudanan-Krishnan-Ninan (MKN) *** most probable mechanism function was suggested by comparing the kinetic parameters. The kineticequation for the first stage can be expressed as dα/dt = Aexp(-E/RT)·3(1 - α)^(2.3). Thelifetime equation at mass loss of 10% was deduced as lnτ= -2..742. + 19797.795/T by isothermalthermogravimetric analysis.

关键词： thermochimica non-isothermal kinetics TG-DTG terbium complex O-methylbenzoate 1,10-phenanthroline

ARCHITECTURE OF MANUFACTURING EXECUTION SYSTEM IN THE EXTENDED ENTERPRISE

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2002年第1期15卷 90-93页

作者： Song Haisheng College of Electronic and Mechanical Engineering， Hebei university of Science and Technology，shijiazhuang 050054，{{2. Wang Jiahai Zhang Shu Tongji university College of Electronic and Mechanical Engineering Hebei University of Science and Technology Shijiazhuang 050054 China

The extended enterprise is formed according to the philosophy of dispersednetworked manufacturing. Manufacturing execution system (MES) can close the information gap whichexists between device control system and production information management system. The functions andthe web-based architecture of the MES in the extended enterprise are introduced. Using thecooperating system models of object-oriented and distributed agents and CORBA, all objects keep touniform interface standards and are easily inserted to object request broker. The utilization ofdistributed MES in extended enterprise can adapt fast change of manufacturing environment andresource. It also can improve the independent management capability of manufacturing cell and theenterprise response capability to global economic competition.

关键词： Extended enterprise Manufacturing execution system Dispersed networkedmanufacturing Agent

Pollen assemblages from different agricultural units and their spatial distribution in Anyang area

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第6期55卷 544-554页

作者： WANG XueLi1,2.LI YueCong1,2.XU QingHai1,2.CAO XianYong1,2.ZHANG LiYan1,2.& TIAN Fang1,2.1 College of Resource and Environmental Sciences,Hebei Normal university,shijiazhuang 050016,{2. 2.Hebei Key Laboratory of Environmental Change and Ecological Construction,shijiazhuang 050016,{2. College of Resource and Environmental Sciences Hebei Normal University Shijiazhuang China Hebei Key Laboratory of Environmental Change and Ecological Construction Shijiazhuang China

Pollen analysis is one of the best and possible approaches for the quantitative reconstruction of paleobotany and paleoclimate,and discrimination of human *** this paper,we reveal the characteristics of pollen assemblages in different agricultural units and their spatial distribution of major pollen taxa in the Anyang area where the human influences are serious,so as to get more information about climate change and human activities from pollen *** pollen assemblages of total 12. surface soil samples from different agricultural units (farm lands,vegetable plots,wastelands,cape-lands,woodlands,etc.) indicate that herbaceous pollen dominates the pollen assemblages with an average of 73%,mainly from Poaceae,Artemisia,Chenopodiaceae and Cruciferae;arboreal pollen percentages reach 18%,mainly from Pinus and Ulmus;shrub pollen and fern spores have very low *** general,pollen assemblages are consistent with vegetation composition,though some differences also exist in different agricultural *** farmlands and vegetable lands,Poaceae pollen has the highest percentages (averaging 2.%) compared to other agricultural units with dominant corn or wheat pollen,while in wastelands and woodlands,arboreal and Artemisia pollen percentages have higher values (averaging 2.% and 19% respectively).Cruciferae has the highest pollen percentages (70%) in *** pollen assemblages and PCoA can generally identify the vegetable plots,farmlands,woodlands,wastelands,and *** and Artemisia pollens mainly appear in the western part of Anyang,which is consistent with the parent plants;Poaceae pollen mainly exist in the eastern part with more farmlands;Chenopodiaceae pollen mainly appear in the urban areas and near major roads where human influences are stronger,Cruciferae pollen can mainly be found in the urban area and in the northwest part of Anyang where more vegetables are planted.

关键词：安阳地区空间分布花粉组合单位农业

Commuting Involutions with Fixed Point Set of Constant Codimension

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1999年第2期15卷 181-186页

作者： Yanying Wang Zhende Wu Yanhong Ding, Department of Mathematics, Hebei Normal university, shijiazhuang 050016, P. R.{{2. Department of Mathematics Hebei Normal University Shijiazhuang P. R. China

Special generators of the unoriented cobordism ring MO* are constructed to determine the groups Jn,kτ of n-dimensional cobordism classes in MOn containing a representative Mn admitting a （Z2.k -action with fixed po... 详细信息

关键词： Cobordism class Fixed point set Projective space bundle (Z2.k-action

china Galileo Test Range and Its Critical Technologies

在线全文

学校读者我要写书评

暂无评论

Transactions of Tianjin university 2009年第6期15卷 463-470页

作者：刘学林蔚保国 School of Management Tianjin University The 54th Research Institute of CETC

With the rapid development of global navigation satellite system (GNSS) and its applications, GNSS test range is becoming the focus of research. This paper, with the cooperation on Galileo Program between Europe and china as background, gives an overview of the development of test ranges for satellite navigation, proposes an implementation plan for china Galileo Test Range (CGTR), presents an analysis of CGTR and describes its overall objective, architecture, function and services, as well as operating modes. Particular analysis and study are given to the critical technologies related to CGTR implementation, including test range simulation and evaluation, time syn-chronizing and keeping, and pseudolite time division multiple access (TDMA) signal design. Research results of this paper can be helpful to GNSS testing and related applications.

关键词： CGTR Galileo satellite navigation test range