SUTDY ON THE FRAMEWORK SYSTEM OF DIGITAL AGRICULTURE

China is a great agricultural country with large population,limited soil resources and traditional farming mode,so the central government has been attaching great importance to the development of agriculture and put forward a new agricultural technology revolution-the transformation from traditional agricultrure to modern agriculture and from exten-sive farming to intensive farming,Digital agriculture is the core of agricultural informatization.The enforcement of digital agriculture will greatly promote agricultural technology revolution.two agricultural transformations and its rapid develop-ment,and enhance China‘s competitive power after the entrance of WTO.To carry out digital agriculture,the frame sys-tem of digital agriculture is required to be studied in the first place,In accordance with the theory and technology of digi-tal earth and in combination with the agricultural reality of China,this artile outlines the frame system of digital agricul-ture and its main content and technology support.     

APPLICATION OF ARTIFICIAL NEURAL NETWORK IN COMPLEX SYSTEMS OF RFGIONAL SUSTAINABLE DEVELOPMENT

Meeting the challenge of sustainable development requires substantial advances in understanding the interaction of natural and human systems. The dynamics of regional sustainable development could be addressed in the context of complex system thinking. Three features of complex systems are that they are uncertain, non-linear and self-organizing. Modeling regional development requires a consideration of these features. This paper discusses the feasibility of using the artificial neural networt(ANN) to establish an adjustment prediction model for the complex systems of sustainable development (CSSD). Shanghai Municipality was selected as the research area to set up the model, from which reliable prediction data were produced in order to help regional development planning. A new approach, which could help to manage regional sustainable development, is then explored.     

EVOLUTION OF URBAN SYSTEM IN NEW ECONOMIC CIRCUMSTANCES AND PLANNING COUNTERMEASURES

As one kind of organizational relation of regional space, in essence, urban system is the spatial reflection of the deep social economic movement.(HERZOG,1991). Since the 1980s, by means of the globalization of economy and high technology and the particular spatial effect, the evolution of urban system has taken on one brand-new landscape different from the traditional one, which also raise new concepts and requirements for urban system planning. Meanwhile, it′s no doubt that active plannin…     

AN ASSESSMENT FOR SUSTAINABLE DEVELOPING CAPABILITY OF INTEGRATED AGRICULTURAL REGIONALIZATION IN CHINA

Based on the provincial units evaluation,this paper makes an assessment for sustainable developing capability of the integrated agricultural regionalization in China.At first ,an index system of agricultural sustainable development in China is built up,which includes 5 supporting subsystems of agricultural resources,agricultural develop-ment ,environment and ecosystem,rural society,sciences-esucation and management.We selected 95 factors on provin-cial level as basic indexes.Second,a relative assets/debt assessing method is used to gain relative net assets values (relative superiority) of every provincial unit,which are as supporting data for assessment.We also overlaid the Administra-tive Divisions Map of China and the Map of Integrated Agricultural Regionalization of China by Geography Information Sys-tem(GIS) to gain the area units of assessment.Third,according to the relative coherence principle of regionalization,we transform administration units to natural units through homogenizing all provincial relative net assets values in every agricultural assessing unit.After making order and grade,we complete the sustainable developing capability assessment to integrated agricultural regionalization in China.The assessing outcome shows that the total sustainable agricultural devdelop-ing capability of China is not high.Only about 1/3 in number or in area has reached the level of agricultural sustainable development.The relative net assets values exists a reducing trend from East China to West China.It needs a long period and great efforts to realize sustainable agricultural development over all China.Finally,there is a discussion to the study method.     

SUSTAINABLE AGRICULTURE DEVELOPMENT IN SALINE—ALKALI SOIL AREA OF SONGNEN PLAIN, NORTHEAST CHINA NORTHEAST CHINA

There is great potential for agriculture in saline-alkali soil area in Songnen Plain, Northeast China. Butthe sustainable crop production in this area has been restricted by a few of main factors, such as less precipitation, higherevaporation and frequent drought, high salinity and alkalinity, high exchangeable sodium content and poor infiltration ofthe soil, and insufficiency and low availability in nutrition. It is also considered that there are a few of favorable condi-tions for agricultural development in this region, such as sufficient light and heat resources, rich ground water resources,plenty of manure produced by livestock, and so on. At the same time, scientific management and measurements havebeen employed; rational irrigation and drainage system has been established; reclamation, amendment and fertilization ofsoil, and suitable strategies of cropping practices have been made for the sustainable development of agriculture. Great progress has been made during 1996- 2000.     

AN UNDERWATER CAMERA-W SYSTEM FOE THE STUDY OF SEA FLOOR PROFILE

A ship deployed remote control underwater camera closed-circuit TV system was developed for observation of sea floor dynamics and processes, microgeomorphology and sediment-water profile of silt-clay sediment, water visibility, activities of benthic organisms, etc.It takes photos and video tape recordings while a TV monitor shows a picture of the scene below. The instrument was successfully deployed to take a series of video tape recordings during a field test in Jiaozhou Bay near Qingdao.The instrument consists mainly of a watertight underwater cubicle with a wedge shaped lower case and a transparent plastic window. Plunged into the bottom by its own weight, the remote controlled TV-camera takes photos through the window. The instrument penetrates the sea bed to about 100-150 mm and can take close up photos with a view area of about 1 square meter.The possibility of getting real time pictures of suspended solid matter motion in the very turbid benthic layers usually found in estuaries is discussed.     

THOUGHTS ON CONSTRUCTING THE DEMONSTRATING AREAS OF THE ECOLOGICAL REBUILDING AND ECONOMIC SUSTAINABLE DEVELOPMENT IN HEXI PEGION

Based on the field investigations,this paper analyzes systematically the achievements and problems of constructing the demonstrating areas of the ecological rebuilding and economic sustainable development in Hexi,Gansu Province,and then the thoughts on constructing the demonstrating areas are brought forward.It is considered that all kinds of ecological demonstrating areas should be merged in order to construct large-scale characterized demonstrating areas which go beyoud the district.In other words,in Hexi Region,Zhangye District should be constructed as the largest ecoagriculture demonstrating area of high technology;Wuwei District should be constructed as the largest ecological demonstrating area of agricultural comprehensive exploitation;JinJia District,which is the shortened form of Jiuquan and Jiayuguan,should be constructed as the largest ecotourism demonstating area;and Jinchang City should be constructed as the largest ecoindustry demonstrated area.At the same time,the constructing pattern should be selected according to the actual circumstances;science and technology should be applied to construct the demonstrating areas and accelerate the industrialization in the big market.Additionally,is is important to smooth the constructing system and implement the flexible and efficacious running mechanism,and it is suggested that the committee should be organized on administer the ecological demonstrating areas in Hexi Region.     

THE ECONOMIC IMPACT OF SPATIAL ORGANZATIONAL STRUCTURES ON THE PROVINCIAL BORDER－REGIONS OF CHINA

郭荣星ＴＨＥＥＣＯＮＯＭＩＣＩＭＰＡＣＴＯＦＳＰＡＴＩＡＬＯＲＧＡＮＺＡＴＩＯＮＡＬＳＴＲＵＣＴＵＲＥＳＯＮＴＨＥＰＲＯＶＩＮＣＩＡＬＢＯＲＤＥＲ－ＲＥＧＩＯＮＳＯＦＣＨＩＮＡ￥ＧｕｏＲｏｎｇｘｉｎｇ（ＳｃｈｏｏｌｏｆＥｃｏｎｏｍｉｃｓａｎｄＴｒａｄ...     

SUSTAINABLE DEVELOPMENT OF MARINE ECONOMY IN CHINA

China is a large marine country. Developing marine economy is an effective way to solve a series of problems with which man is faced, such as the want of natural resources, space limitation, the environmental deterioration, etc. This article analyzes the rich resources of marine biology, harbor, offshore oil and natural gas and coastal tourism resources in China and describes the developing features and regional differences of marine economy. To realize the sustainable development of marine economy in China, what we need to do are as follows: 1 ) to list exploiting ocean into national development strategy; 2) to realize integrated economy of sea and land; 3) to develop ocean by science and technology; 4) to perfect legal institution of marine environment; 5) to establish new idea of sea defending.     

REGIONAL DIFFERENCES OF ECONOMIC DEVELOPMENT OF THE CHANGJIANG RIVER VALLEY

ＲＥＧＩＯＮＡＬ ＤＩＦＦＥＲＥＮＣＥＳ ＯＦ ＥＣＯＮＯＭＩＣ ＤＥＶＥＬＯＰＭＥＮＴ ＯＦ ＴＨＥ ＣＨＡＮＧＪＩＡＮＧ ＲＩＶＥＲ ＶＡＬＬＥＹ ＣｈｅｎＧｕｏＪｉｅ（陈国阶）（ＣｈｅｎｇｄｕＩｎｓｔｉｔｕｔｅｏｆＭｏｕｎｔａｉｎＤｉｓａｓｔｅ...     

Complex ecologic-economic system of afforestation—An example of sustainable agriculture

The paper deals with a transformation model of a backward district into a prosperous one. The district is geographically located in Lixiahe region, Jiangsu Province. The region had long been known as one of the poorest area in China, and had been alternatively attacked by flood, waterlogging, drought, salinization, and plague of insect. Since the seventies of this oentury efforts to open up trenches on lowland and to level up the shoaly land have been made. A kind of tree, which is tolerable to high watertable, was used to afforest the land. Cereal crop, vegetable and beans are grown. In some cases, the shoaly land is used for sheep grazing and fishery. A favorable combination of forestry, agriculture, animal husbandry and fishery has been set up in the region. There are five types of managements in the system: 1) forestry-agriculture complex management, 2) forestry-fishery complex management, 3) forestry-aquatic plant-fishery complex management, 4) forestry-animal husbandry complex management, and 5) forestry-edible mushroom complex management. The principles and ecological benefits of this system can be identified: 1) Increase soil fertility by piling mud from marsh land on top soil, and thicken the arable layer. 2) Enhance the utilization rate of sunlight and energy, due to the change of microclimate in field. 3) As a result of multiple layer cultivation and multi-cropping, the production has been greatly increased. 4) Accelerate the cycling of matter and conversion of energy and nutrient of the system. 5) Decrease the consumption of soil fertility and increase the capability of controlling insect pests. 6) Improve ecological environment by afforestation. 7) Raise income and provide jobs for local peasants, even some ones from other part of this province.     

从可持续发展的物质体系谈辽宁省的矿业与环境

从矿业资源、环境与生态的平衡关系出发,讨论了矿业资源领域在社会经济发展中的极其重要的基础地位;从矿产资源的不可再生性等特点讨论了矿业资源的可持续发展对全社会经济可持续发展战略实施的决定性作用; 从矿产资源开发、利用的现状已对环境产生的危害和正在产生的危害,讨论了矿业可持续发展的必要性、紧迫性和艰巨性。通过对辽宁省矿产资源的特点、矿业开发利用的现状及其矿业环境的分析, 讨论了矿业开发利用与矿山环境保护之间内在的、不可分割性和影响因素,并在此基础上提出了建议。     

东秦岭造山带核部杂岩水热系统演化机制

东秦岭造山带核部杂岩，在高温高压环境下曾出现大量流体，由溶解作用产生的流体在变形分解带内运移，形成古水热循环系统，该水热系统使岩石中如铀等大离子富集成矿，水岩相互作用造成秦岭杂岩中稀土元素四重分布效应．     

灰色系统理论在地震预报中的应用

研究了灰色系统理论在地震预报中的应用，作为应用实例．对南北地震带北段及其邻近地区M≥6．0地震进行了建模和预测。根据模型检验精度、模型的关联度R、后验差比值C、小误差概率P等项指标说明所建模型可靠、精确．灰色系统理论用于地震预报是可行的。     

IMPACT OF FUTURE SEA LEVEL RISE ON FLOOD AND WATER LOGGING DISASTERS IN LIXIAHE REGION

ＩＭＰＡＣＴＯＦＦＵＴＵＲＥＳＥＡＬＥＶＥＬＲＩＳＥＯＮＦＬＯＯＤＡＮＤＷＡＴＥＲＬＯＧＧＩＮＧＤＩＳＡＳＴＥＲＳＩＮＬＩＸＩＡＨＥＲＥＧＩＯＮ许朋柱ＩＭＰＡＣＴＯＦＦＵＴＵＲＥＳＥＡＬＥＶＥＬＲＩＳＥＯＮＦＬＯＯＤＡＮＤＷＡＴＥＲＬＯＧＧＩＮＧＤＩ...     

南阳矿业可持续发展对策研究

可持续发展战略已成为中国今后发展的必然选择。南阳是矿产资源丰富的地区 ,如何把握矿业在可持续发展中的地位和重要性 ,怎样推动矿业走上可持续发展道路 ,是一个十分重要的课题。南阳地理位置优越 ,矿产资源丰富 ,具有发展矿业的有利条件。但是 ,南阳矿业存在着观念落后、经营粗放、污染环境和矿业管理滞后等因素 ,制约着南阳矿业可持续发展。实现南阳矿业可持续发展的思路 :必须处理好近期与远期、局部与全局利益的关系 ,处理好资源开发与保护的关系 ,处理好资源开发与保护生态环境的关系 ,促进矿产资源开发利用方式从粗放型向集约型的转变。为实现南阳矿产资源真正成为社会与经济长期发展的支柱产业 ,提出六条对策 :①加强宣传 ,转变观念 ,提高资源意识 ;②对矿产资源严格管理 ;③依靠科技 ,提高利用矿产资源水平 ;④扩大对外开放 ,积极推进矿业权改革 ,促进地勘事业发展 ;⑤加强矿产资源开发中的环境保护 ,保持经济发展和生态环境的协调统一 ;⑥搞好高铝三石———蓝晶石、矽线石、红柱石资源综合开发利用。     

STUDY ON FUNCTION OF COMPONENTS OF DY NAMIC SYSTEM OF TOURISM DEVELOPMENT IN DEVELOPED REGION---A Case Study of Foshan in Guangdong Province

Basedontheliteraturereview，previousqualitativeanalysis，andthemarketresearch，adynamicsystemoftourismdevelopmentfromtheviewofsupplysideisformedforthecityindevelopedregion，whichcanbeappliedtorealizewhichcomponentsaredrivingthede－velopmentofregionaltourism，whatthefunctionsofthemareandwhichfactoristhemainforcefortourismdevelopment．FoshanCityistakenasacaseinthispapertocarryoutquantitativeanalysisandfingeroutthefunctionofeachcomponentintheDynamicSystemofTourismDevelopment（DSTD）．１DYNAM…     

地质勘查体制研究及发展态势

改革开放二十年来,我国国民经济发展迅猛,对矿产资源的需求量与日俱增,为使矿产资源供应能保证国民经济发展的持续性,就必须强化地质勘查工作,对计划经济体制下形成的、不适应经济发展需要的原有地勘队伍管理体制进行改革。地勘队伍实行属地化管理、企业化经营;对不同性质的地质勘查工作采取不同的管理方式,对基础性、公益性、战略性地质工作采取事业机制管理方式,将由新组建的中国地质调查局组织实施;对商业性地质勘查工作采取企业机制管理方式,逐步发展成为以经济效益为中心的自主经营、自负盈亏、自我发展的经济实体     

胶东温泉的地热属性与可持续开发对策

从胶东所处的板块构造位置和区域控热构造入手,根据地热传导理论,对胶东温泉的地热属性进行分析研究,认为胶东半岛温泉地热属性为毗邻板块边缘高温地热带的板内中低温地热系统,它以偏高的大地热流值为地热背景,以局部控热构造聚敛的大地热流为热源,以地形高差影响和相应的水力压差作用为动力,入渗的大气降水被岩石中的热量加热,并沿断裂出露形成温泉地热水。根据山东半岛温泉地热属性的特点和地热水开发中所面临的问题,提出保持胶东温泉可持续开发的相关对策。