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1On the new results of global attractive set and positive invariant set of the Lorenz chaotic system and the applications to chaos control and synchronization显示文摘Constructing a family of generalized Lyapunov functions, a new method is proposed to obtain new global attractive set and positive invariant set of the Lorenz chaotic system. The method we proposed greatly simplifies the complex proofs of the two famous estimations presented by the Russian scholar Leonov. Our uniform formula can derive a series of the new estimations. Employing the idea of intersection in set theory, we extract a new Leonov formula-like estimation from the family of the estimations. With our method and the new estimation, one can confirm that there are no equilibrium, periodic solutions, almost periodic motions, wandering motions or other chaotic attractors outside the global attractive set. The Lorenz butterfly-like singular attractors are located in the global attractive set only. This result is applied to the chaos control and chaos synchronization. Some feedback control laws are obtained to guarantee that all the trajectories of the Lorenz systems track a periodic solution, or globally stabilize an unstable (or locally stable but not globally asymptotically stable) equilibrium. Further, some new global exponential chaos synchronization results are presented. Our new method and the new results are expected to be applied in real secure communication systems.LIAO Xiaoxin 1, 2, 3 , FU Yuli 4 & XIE Shengli 4 1. Department of Control Science & Control Engineering, Huazhong University of Science & Technology, Wuhan 430074, China 2. School of Automation, Wuhan University of Science & Technology, Wuhan 430070, China 3. School of Information, Central South University of Economy, Politics and Law, Wuhan 430064, China 4. School of Electronics & Information Engineering, South China University of Technology, Guangzhou 510640, China Correspondence should be addressed to Liao Xiaoxin (email: xiaoxin_liao@hotmail.com) 2005Science in China(Series F)2005,48,3:23
2CO_2 Emission Induced by Urban Household Consumption in China显示文摘Household consumption is one of the important factors that induce CO2 emission.Based on input-output model,this article calculated the intensity of CO2 emission of different income groups and seven provinces in China,and then estimated total CO2 emission induced by urban household consumption from 1995 to 2004 in China based on statistic data of household living expenditure.The results show that CO2 emission per capita induced by household consumption had increased from 1583 to 2498 kg CO2 during 1995-2004.The ratio of consumption-induced CO2 emission to total CO2 emission had risen from 19% to 30% in the past decade.Indirect CO2 emission accounted for an important part of the consumption-induced emission,the ratio of indirect emission to consumption-induced emission had risen from 69% to 79% during the same period.A significant difference in consumption-induced CO2 emission across different income groups and different regions has been observed.CO2 emission per capita of higher income groups and developed regions increased faster than that of lower income groups and developing regions.Changing lifestyle has driven significant increase in CO2 emission.Especially,increases in private transport expenditure(for example,vehicle expenditure) and house building expenditure are key driving factors of growth in consumption-induced CO2 emission.There are big differences in the amount of CO2 emission induced by change in lifestyle across different income groups and provinces.It can be expected that lower income households and developing regions will increase consumption to improve their livings with income growth in the future,which may induce much more CO2 emission.A reasonable level of CO2 emission is necessary to satisfy human needs and to improve living standard,but a noticeable fact is that CO2 emission per capita induced by household consumption in developed areas of China had reached a quite high level.Adjustment in lifestyle towards a low-carbon society is in urgent need.Wang Yan1,2,3,Shi Minjun1,2 1.Graduate University of Chinese Academy of Sciences,Beijing 100049,China 2.Research Center on Fictitious Economy and Data Science,CAS,Beijing 100190,China 3.Communications University of China,Beijing 100024,China 2009Chinese Journal of Population,Resources and Environment2009,7,3:22
3Re-Os age for molybdenite from the Gangdese porphyry copper belt on Tibetan plateau: Implication for geody- namic setting and duration of the Cu mineralization显示文摘The Gangdese porphyry copper belt consists of one large and five middle-small deposits in addition to dozens of ore-bearing porphyry bodies. The belt trends 350 km long along the EW-striking Gangdese batholith, and locally occurs as a string of beads extending about 50 km within the SN-trending rifting zones (grabens) on the Tibetan plateau. Monzonitic granite- porphyry and quartz monzonitic porphyry, as dominant host rocks, are shoshonitic and potassic calc-alkaline. Available dating data indicate that the ages of the shallow-level emplacement for these porphyries vary from 10 Ma to 18 Ma, which are identical to that of associated potassic calc-alkaline volcanic rocks (10—15 Ma) and mafic dykes (13—18 Ma). The timing and duration of Cu mineralization events are constrained by Re-Os ages for molybdenites from three porphyry copper deposits in the Gangdese porphyry copper belt. Five molybdenite samples from the Nanmu deposit yielded an 187Re-187Os isochron with a highly pre-cise age of (14.76?.22) Ma; six molybdenites from the Chongjiang deposit gave an isochron age of (14.04?.16) Ma. Re-Os model ages for two molybdenite samples from Lakang抏 deposit vary from 13.5 Ma to 13.6 Ma, which are basically identical to isochron ages mentioned above. All the thirteen samples from these three deposits yielded a linear array in the isochron diagram with a higher correlation coefficient of 0.99719 and an isochron age of (14.39?.22) Ma (1s error), suggesting an coeval event of the Cu mineralization and a shared source of ore materials for the Gangdese porphyry copper belt. Compared with the longer-lived felsic magmatic-hydrothermal system, the Cu mineralization is a relatively short event with duration of about 0.5 Ma, and usu-ally occurs in the later-stage of the complicate magmatic system. The emplacement age of the Gangdese porphyries indicates that they intruded after the rapid rising of the Gangdese Mountains at 21—23 Ma, and formed in a post-collision crustal ex-tension environment. Constraint of the NS-trending rifting zones (grabens) on localization of these porphyry bodies implies that the minor east-west stretching dates back to approximately 18 Ma. Highly precise Re-Os age of the Cu mineralization event indicates that a significant east-west extension has commenced at about (14?.5) Ma ago, which is identical to that of the normal faulting in central Tibet (13.5 Ma) and southern Tibet (14 Ma). The strong extension not only provided dilatant conduits for the migration and emplacement of the porphyry magmas pooling near the base of lithosphere, but also resulted in the rapid rising of a large volume of volatile, thus in turn constraining the temporal-spatial localization of the Gangdese porphyry Cu belt.HOU Zengqian1, QU Xiaoming1, WANG Shuxian2, DU Andao2, GAO Yongfeng3 & HUANG Wei4 1. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China 2. National Center of Geoanalysis, Chinese Academy of Geological Sciences, Beijing 100037, China 3. Shijiazhuang College of Economy, Shijiazhuang 056000, China 4. Xizang Bureau of Geology and Mineral Resources, Lhasa 850000, China 2004Science China Earth Sciences2004,47,3:18
4Regional differences and determinants of built-up area expansion in China显示文摘Based on remote sensing data on land use provided by the Chinese Academy of Sciences and socio-economic data collected by the authors,this paper analyzes the trends and regional differences in built-up area(BUA) expansion in China from the late 1980s to 2000,and empirically estimates the major determinants of BUA expansion in different regions in 1996―2000.In 1989―2000,although China's overall BUA expansion accelerated,the trends differed significantly among regions.BUA expansion in the central and western regions accelerated significantly,but it slowed down considerably in the east-ern region.The estimation results from our econometric analysis reveal that BUA expansion in the eastern region reached a period when economic growth had no further significant impact on per capita BUA,the land utilization in this region has become more intensive with further expansion of the economy.In the central and western regions,the BUA has expanded remarkably due to the relatively more flexible land development policies and the relatively cheap land prices.Therefore,as the econ-omy continues to grow rapidly,policies relating to BUA expansion and cultivated land reductions may face more serious challenges in the central and western regions.HUANG JiKun1,2,ZHU LiFen3,1 & DENG XiangZheng1,2 1 Center for Chinese Agricultural Policy,Chinese Academy of Sciences,Beijing 100101,China 2 Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China 3 Research Center of the Economy of the Upper Reaches of the Yangtze River,Chongqing Technology and Business University,Chongqing 400067,China 2007Science China Earth Sciences2007,50,12:17
5我国海外人才回流的动因分析显示文摘首先分析了当今世界人才需求状况以及我国海外人才流失的严重性,然后分别将经济因素、科技因素、教育因素等指标进行量化并研究它们各自与人才回流数量的相关关系,在结合我国实际情况的基础上,借鉴世界各国人才回流的经验,最终提出促进我国人才回流的政策建议。Research Team(School of Economy, Ocean University of China, Qingdao 266071, China) 2004软科学2004,18,5:17
6收入增长·就业转移·城镇化推进——农村经济发展面临的突出问题及政策选择思路显示文摘我国的农村经济体制改革已经走过了20年的历程。20年的农村改革,不仅推动了农村经济结构和经营体制的变革,促进了农业和农村经济的蓬勃发展,使农产品供给基本告别了绝对短缺时代,农民的生活水平极大改善,而且还有力地支持了这一时期我国国民经济的高速增长,推动...by the Rural Economy Research Center of the Ministry of Agriculture, China 1999管理世界1999,15,1:16
7The new interpretation of support vector machines on statistical learning theory显示文摘This paper is concerned with the theoretical foundation of support vector machines (SVMs). The purpose is to develop further an exact relationship between SVMs and the statistical learning theory (SLT). As a representative, the standard C-support vector classification (C-SVC) is considered here. More precisely, we show that the decision function obtained by C-SVC is just one of the decision functions obtained by solving the optimization problem derived directly from the structural risk minimization principle. In addition, an interesting meaning of the parameter C in C-SVC is given by showing that C corresponds to the size of the decision function candidate set in the structural risk minimization principle.ZHANG ChunHua 1 , TIAN YingJie 2 & DENG NaiYang 3,1 School of Information, Renmin University of China, Beijing 100872, China 2 Research Center on Fictitious Economy and Data Science, Chinese Academy of Sciences, Beijing 100080, China 3 College of Science, China Agricultural University, Beijing 100083, China 2010Science China Mathematics2010,53,1:12
8Risk analysis system of geo-hazard based on GIS technique显示文摘The socio-economic attribute of geo-hazard made us distinguish it fiom the traditional engineering geology study. It will get more social benefit from the analysis of the geo-hazard in the socio-economic attribute. The hazard and the vulnerability of the element controls the risk level of the regional geo-hazard. The risk analysis supported by GIS in geo-hazard study is one of the most important directions. Based on the author′s studies in recent years, a risk analysis system of regional geo-hazard (RiskAnly) has been developed on the basis of software MAPGIS. The paper introduces the train of system design, the structure and the workflow of RiskAnly. As a case study, the paper also deals with the risk zonation of the regional landslide hazard of China.ZHU Liangfeng, ZHANG Guirong, YIN Kunlong, ZHANG Liang (1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China 2. China Research Institute of Land Resources and Economy, Beijing 101149, China) 2002Journal of Geographical Sciences2002,12,3:11
9Designation and Development of Central Towns: A Case Study of ShiyanLIU Aihua, PhD, College of Resources and Environment, Graduate School of Chinese Academy of Sciences Post-doctor, College of Economy, Nankai University and Tianjin Urban Planning and Design Institute, Tianjin, P. R. China. Research area: region planning, integrated urban-rural planning. XIE Zhengguan, Professor, College of Resources and Environment, Graduate School of Chinese Academy of Sciences, Beijing, P. R. China. Research area: urban geography and urban planning. ZHENG Yangyang, Assistant Planner, ICON United, Beijing, P. R. China. Research area: urban geography and urban planning. 2012China City Planning Review2012,21,1:8
102007~2010年福建省造纸产业发展行动计划显示文摘在国家发改委发布《造纸产业发展政策》以及中国造纸协会发表《关于造纸工业'十一五'发展的意见》的同时,福建省经贸委发布了《福建省造纸产业发展行动计划》(以下简称《行动计划》)。《行动计划》为今后福建省造纸产业的发展指明了方向,是今后福建纸业发展的行动指南。《行动计划》以福建省经贸委红头文件的形式颁布,足以看出福建省政府部门对发展造纸产业的重视。这在其它省份并不多见。该计划分析了福建纸业的发展现状,指出了存在的问题,提出了发展的目标和'十一五'后几年要完成的主要任务,尤其是有保障措施。该计划把节能减排降耗和林浆纸一体化作为今后工作的重点,有利于推进福建纸业又好又快地发展。Fujian Economy and Trade Committee 2008中华纸业2008,29,11:7
11Evaluation model of venture investment based on fuzzy matter-element method of combined weight显示文摘An evaluation model of an international venture investment project on the basis of fuzzy matter-element and combined weight methods is introduced. First, the compound fuzzy matter-element of optimal subordinate degree is constructed on the principle of the bigger-more-optimal or the less-more-optimal depending on the actual evaluation indicators, and combined with standard fuzzy matter-element to form a difference-square fuzzy matter-element. Secondly, a combined weight is calculated by both information entropy and the expert grading method. Finally, the compound fuzzy matter-element of Euclidian approach degree by M(·,+)method is constituted and used to classify venture investment projects. Based on the model above, six venture investment projects in a company are evaluated, and the results show that the projects are all good, which is demonstrated by the good income of the projects. Therefore, the coincidence of evaluation results and actual operation status indicates that the model is of great value in practical application.Meng Lin1 Bao Guangping2 Sun Yutao1(1 Department of Economics, Dalian University of Technology, Dalian 116024, China)(2 Finance and Taxation School, Northeast Finance and Economy University, Dalian 116025, China) 2008Journal of Southeast University(English Edition)2008,24,S1:5
12Preliminary Study of Ancient Town Protection and Rural Tourism Development of Caoshi Town in Hengdong County,Hunan Province显示文摘The typical style and features of mountains and waters in Caoshi Ancient Town,have hitherto been well preserved. Caoshi Ancient Town boasts superior base of the natural eco-environment and deep-rooted background of regional culture,where mountains,waters,shoals,towns and other landscape elements are merged harmoniously,the transportation and geographical conditions have been fundamentally changed. Ancient towns,old temples,ancient forests,ancient wells and ancient piers are unique in different ways,with characteristics of tourism resources such as long history and ancient folklore. It should seize the historical opportunity of China vigorously developing rural tourism based on the construction of the new socialist countryside,to make characteristic agricultural economy gain ground; assume the leading role to drive the development of tourism economy in surrounding areas; correctly handle the relationship between development and protection to walk the path of sustainable development of tourism.LIU Tian-zhao 1 ,YANG Zai-tian 1,2 ,LIU Pei-lin 1 1. Department of Resource Environment and Tourism Management,Hengyang Normal University,Hengyang 421008,China 2. School of Economics and Management,Hunan Science and Technology Economy Trade Vocation College,Hengyang 421009,China 2012Asian Agricultural Research2012,4,8:5
13我国循环经济行业2012年发展综述显示文摘综述了我国循环经济行业发展的政策环境、2012年国家及有关部门发布实施的有关循环经济的政策法规;重点分析了矿产资源、废钢回收加工、废旧轮胎回收加工、废旧塑料利用及其他再生资源开发利用业的循环经济发展概况;简介了行业内最具影响力的示范基地;针对行业发展中存在的主要问题提出了建议。Specialty Committee of Circular Economy,CAEPI 2013中国环保产业2013,,9:4
14Positioning localities from spatial assertions based on Voronoi neighboring显示文摘With the rapid development of Internet,much spatial information contained in non-structured or semi-structured documents is available on the World Wide Web.In such documents,localities are always textually described using spatial relationships and named places,instead of numerical coordinates.Hence,extracting positional information from locality descriptions is an important task.In this paper,we bridge two aspects of locality descriptions,namely generating locality descriptions and positioning localities,and provide a method to compute probability density according to the selection probability of a reference object to describe the position of the target object.Refinement operation on uncertainty field is used to deal with locality description involving multiple reference objects.Three metrics are introduced to measure the results of positioning localities.We choose the mixed selection probability function based on Euclidean distance and Voronoi stolen-area to compute probability density function.Finally,we use three cases to demonstrate the proposed methods.GONG YongXi 1,2,3,LI GuiCai 1,LIU Yu 2 & YANG Jian 1 1 Shenzhen Key Lab of Recycling Economy,Peking University Shenzhen Graduate School,Shenzhen 518055,China 2Institute of Remote Sensing and Geographical Information Systems,Peking University,Beijing 100871,China 3College of Urban and Environmental Science,Peking University,Beijing 100871,China 2010Science China(Technological Sciences)2010,53,S1:4
15Towards sustainable mining cities: what policies should be sought and experiences could be learnt for China?显示文摘This paper aims to explore interinks between population, resoures, environment anddevelopment of mining cities in China. The authors place emphasis on speeific policy stud of how tostep a sustainable rnining city based on the analysis of six components constituting the integrative andsystendc backdrop to mining city sustainability. The attempts are taken to make a deep comparisonbased on the studies in the five typical cities of Datong, Daqing, Panzhihua, Jinchang and Golmud ofChina, combining some experiences and theorehca thoughts from the Western countries. Therelationship between the resourees endoment, mining (in broader sense) and economic developmentis given based on the analysis of development of mineral resources and formahon of mining cities.Morcover, some changing characteristics and related issues of China’s mining cities on environmentand socio-econondc dimensions are considered. The last part of the paper focuses on the discussion ofrestructuring approach to the mining cities in China, some reflections and suggestions are put forward.SHEN Lei, Ray Hudson(1. Centre for Resource Economy and Development, Commission for Integrated Survey of NaturalResources, Chinese Academy of Sciences, Beijing 100101, China 2. Department of Geography,University of Durham, South Road, Durham DH1 3LE, UK) 1999Journal of Geographical Sciences1999,9,3:4
16TEDA(Tianjin Economic-technological Development Area)——A General Survey, Experience and the Plan for Future Development.显示文摘Since its establishment about ten years ago, TEDA has taken advantage of eachopportune time created by China’s policy of opening wider and wider to the outsideworld and the rapid economic growth to deepen its reform and extend its exploitation,and thus has maintained a favorable momentum and an extraordinary high speed foreconomic development. With the total economic output of the whole area raised toTian gui-ming Chi Chang-gui Wan Qian Spokesman, Director of the Commission Office of TEDA. Visiting Professor of Tianjin Institute of Commerce M. A. of Economies, Vice Director of the Commission Office of TEDA Deputy Chief of Secretary Section of the Commission Office of TEDA Shen Huan 1994南开经济研究1994,,S1:2
17Research on Supplying Mechanisms of Rural Economic Able-person in Construction of New Countryside——Based on the Phenomenon of Intelligence Returning in Under-developed Agricultural Plain Area of Henan显示文摘From a perspective of the discussions on researches of economic able-person by researchers at home,it can be concluded that economic able-person has become the important mode promoting rural development.The research makes a discussion on the rural intelligence returning theory and points out that as a marketing action,rural intelligence returning functions directly and effectively on the supplying to rural economic able-person.The research also makes an analysis of the supplying mechanisms of rural able-person intelligence returning of the under-developed agricultural plain in Henan province.And results show that transferring of rural surplus labors takes place among provinces;farmers accelerate in returning to hometowns to make money and returning phenomena would tend to be normal.With more and more popular the intelligence returning phenomenon in rural areas,the under-developed agricultural plain in Henan province would make enough profits.SHAO Ming-wei Industrial Economy and Rural Development Institute,Henan University,Kaifeng 475004,China 2011Asian Agricultural Research2011,3,3:2
18Application of Grey Associative Analysis to the Assessment of Regional Water Security显示文摘The assessment of water security is an important content in the security management of water resources due to the fact that the state of water security directly affects both the sustainable development of regional economy and the improvement on the living quality of mankind. Grey associative analysis is introduced and applied to assessment of water security on the basis of grey characteristics of the assessment index system of water security. As a case study shows, grey associative analysis is used for evaluating water security of some provinces in China, and the satisfactory assessment results are obtained. The sequence of provinces in China with regard to water security from good to poor is obtained and, moreover, the water security level of each region is also confirmed. The results obtained accord with the actual state of each region. They are of practical significance and can be used to guide the management of regional water security and a sustainable development of the economy therein. At the same time, the results demonstrate that grey associative analysis provides a new method for assessing waterZhang Yanmin~1, Dong Qianjin~1, Wang Xianjia~1, Wang Jianping~2, Fu Chun~3(1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China 2.College of Economics and Management, China Three Gorges University, Yichang 443002, China 3. Center of China Central Economy Development, Nanchang University, Nanchang 330047, China) 2007工程科学(英文版)2007,5,2:2
19Research on a Distribution Center Location Model Based on a Particle Swarm Optimization Algorithm显示文摘Logistics is supposed to be the important source of profits for the enterprises besides reducing material consumption and improving labor productivity.Transportation costs,distribution center construction costs,ordering costs,safe inventory costs and inventory holding costs are the important parts of the total logistics costs.In this paper,based on the research results of LMRP(location model of risk pooling) location with fixed construction cost,the LMRPVCC(location model of risk pooling based on variable construction cost) will be introduced.Applying particle swarm optimization to several computational instances,the authors find the suboptimum solution of the model.WANG Fei 1,2,HU Xin-bu3,JIA Tao41 School of Economy and Management,Chang’an University,Xi’an 710064,P.R.China 2 Institute of Human Geography,Xi’an International Studies University,Xi’an 710061,P.R.China 3 Architecture Engineering Department,Engineering College of Armed Police Forces,Xi’an 710086,P.R.China 4 School of Management,Xi’an Jiaotong University,Xi’an 710069,P.R.China 2009International Journal of Plant Engineering and Management2009,14,3:2
20Empirical Study on the Relationship between Farmers' Human Capital Investment and Rural Poverty显示文摘Literatures about the relationship between human capital investment and rural poverty are reviewed.According to the time-series data from 1990 to 2007,VAR model and variance decomposition research are used to study the relationship between household human capital investment and rural poverty.Result shows that there is long-run equilibrium relationship between household human capital investment and rural poverty.Educational investment and health investment have significant impacts on the alleviation of rural poverty;while migration investment does not have significant impact on the alleviation of rural poverty.Among the factors causing poverty fluctuations,educational investment has greater impacts on poverty fluctuations than health investment in the short run,but health investment has greater impacts on poverty fluctuations than educational investment in the long run.Based on this,related countermeasures are put forward,such as further increasing the investment in education and health,implementing the compulsory education and social security system,consolidating the rural cooperative medical care,improving the retirement pension system in rural areas,and perfecting the training and technical extension system for rural population under the poverty line.LI Cui-jin College of Economy and Trade,Shihezi University,Shihezi 832000,China 2010Asian Agricultural Research2010,2,10:2
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