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1.
齐清文 《地球信息科学学报》1998,(Z1)
地图学是一门既古老又年青的学科,在地球科学中起着十分重要的作用。本文研究了地图学的知识创新和知识增长的模式,制定了地图学的知识创新体系和研究方案,并讨论了三个核心创新点的实质、难点、创新途径等。本文认为,地图学的知识创新体现的是地图的科学价值的增殖,地图学的实际应用则体现了地图的社会功能的增强。地图学的知识创新方案应该包括从基础理论和应用基础理论研究,到技术创新,再到新产品开发和地图产业化的整个过程和体系。 相似文献
2.
“数字地球”科学工程 总被引：10，自引：0，他引：10
“数字地球”是集科学、技术和工程于一体的一项宏伟的科学体系。“数字地球”由基础研究、技术支撑和科学工程三部分组成,其中科学工程是“数字地球”的核心和目标。文章在我国“数字地球”科学工程现状分析的基础上,结合国情,对我国“数字地球”科学工程的发展提出了建议。 相似文献
3.
现代地图与地图学概念认知及学科体系探讨 总被引：2，自引：0，他引：2
现代地图与地图学是传统地图与地图学发展到现代阶段的必然结果。本文重点探讨现代地图与地图学的基本概念和学科体系。文章从现代地图的特性、功能、构成要素/基础及拓展,以及地图科学分类及拓展等基本问题入手,分析了国内外现代地图与地图学概念定义的发展演变,给出了现代地图与地图学较为精练、准确的概念定义;讨论了现代地图学的学科结构体系和由传统到现代过渡时期的学科基本名称与研究内容;最后展望了未来地图学的发展前景。 相似文献
4.
地图学网站的设计与实现 总被引：5，自引：0，他引：5
随着计算机与互联网技术的发展与应用,古老的地图正在发挥着越来越重要的作用。为了普及地图学知识,增加人们对地图的了解与应用,适应网络化教育发展的需要,我们建立了专业性的“地图学网站”。本文介绍了该地图学网站的主要内容、功能设计与实现方法,对地图学网站及网络地图的设计与实现进行了初步的探索。 相似文献
5.
迎接“数字地球”的挑战——关于内涵、机遇及对策的讨论 总被引：4，自引：0，他引：4
本文在叙述了“数字地球”的产生背景的基础上,着重分析了“数字地球”的科学内涵、“数字地球”给地球科学带来的新契机和我们应有的对策.笔者认为,“数字地球”是国家利益和现代科学技术的综合产物;“数字地球”的科学内涵可分为宏观战略层、技术实现层和应用层三个层面;“数字地球”是一个战略,并不能代替相关的学科和技术领域,现有的科学技术水平也不能完全满足“数字地球”的要求;“数字地球”的兴起给地球科学带来了大好机遇,使地球科学在对地球整体性认识、数字虚拟、对地球复杂巨系统的研究等方面都大大深化;面临“数字地球”的挑战,我们应该采取的策略是积极借鉴数字地球的思想,在继续大力发展现有的相关学科和技术领域的同时,努力进行自主创新,力求通过“中国数字地球”或“数字中国”的建设来占领制高点. 相似文献
6.
海洋科学的前沿-“数字海洋” 总被引：9，自引：0，他引：9
本文所提出的“数字海洋”,系基于当前世界各国极为关注的“数字地球”发展前景 ,其事关我国海洋科学进入21世纪信息时代所面临的挑战和机遇。对此,从“数字地球”概念及其所涉及的新理论和高新技术 ,到中国“数字地球”中的“数字海洋”有待顺应发展,作了概述。同时 ,重点就“数字海洋”技术与目标和建设的设想等作了探讨。 相似文献
7.
《地球信息科学学报》2000,2(1):75-75
<2000年科学发展报告>对1999年最热门的科学前沿领域进行了介绍和评述,反映了1999年世界科学发展的整体趋势以及我国科学发展水平及其所处的地位,并就对科学在我国实施“科教兴国”和“可持续发展”两大战略中所起的作用,向国家提出中国科学发展战略和政策建议。<2000年中国可持续发展战略报告>以其客观性、权威性、前瞻性、文献性作为基本要求,以为国家实施可持续发展战略提供科学理论依据为基本目标,以为国家可持续发展战略的推进提供坚实的手柄为基本目的,是中国科学院多年来对“自然-经济-社会”的复杂关系进行长期理论研究和实践研究的结晶。 相似文献
8.
“数字东营”工程主要由网络信息平台和基础数据平台两部分组成。根据数字城市建设的需求,东营市首先启动“数字东营”城域网项目,现已全面运行,效果很好。现就东营市数字化基础设施规划、网络整体规划以及相关问题进行分析。 相似文献
9.
在社会发展的层面上认识“数字地球” 总被引：1，自引：0，他引：1
本文讨论了“数字地球”的有关问题。指出“数字地球”是人类社会及其活动在网络空间的延伸和拓展,是信息技术带来的社会发展趋势。关于“数字地球”的讨论不应局限在空间信息技术领域,而应该在社会发展的层面上认识它 相似文献
10.
本刊评论员 《地球信息科学学报》2004,6(2):1-2
我国党和政府一贯重视基础研究。在贯彻科教兴国和可持续发展的战略方针的同时,强调“科学技术是第一生产力”,组建国家自然科学基金委员会,支持中国科学院创新计划,高等院校211工程,先后批准了科学界建议的“863","973”计划……。无一不是在强调科学基础研究一强调原始创新。从而使我国基础科学,取得了巨大的进步和可喜的成就。 相似文献
11.
LIWen－yan PANGXiao－min 《中国地理科学(英文版)》2002,12(2):97-106
Northeast Asia with China ,Japan and South Korea as the main components has drawn more and more atten-tion worldwide.Many scholars have researchec on the prospect of some alternatives of regional economic integration in Northeast Asia/or Yellow Sea Rin as its core area.In this paper the authors start with an introduction of the major arguments embracing Yellow Sea Rim regionalism,and attemptto identify the dynamics challenging the proposed approach-es of sub-regionalism of Northeast Asia.The paper firstly gives a brief review on the undate development of bilateral econom-ic exchanges,mainly Sino-Japanese and Sino-South Korean trades and direct investments with related contemporary is-sues.When the changing pattern of economic interactions is analyzed,special concerns are given to the possibility to real-ize the supposed potential of regional economic cooperation mainly based on economic complementarity among the related regions of China ,North Korea,South Korea,and Japan.The authors then made their major efforts on putting forward possible approaches of multilateral cooperation of three countries in the near future,that is ,deepened cooperation in select-ed sectors of industry and transportation and coordinated development among major cities.The authors stress that the develop-ment of sub-regional sectoral cooperation and the formation of interactive network of city-regions via social and economic interactions at local level are significant to the future regional integrated development in Northeast Asia.. 相似文献
12.
The upper Huanghe(Yellow) River basin is situated in the northeast of the Qinghai-Xizang(Tibet)Plateau of China.The melt-water from the snow-cover is main water supply for the rivers in the region during springtime and other arid regions of the northwestern China, and the hydrological conditions of the rivers are directly controlled by the snowmelt water in spring .So snowmelt runoff forecast has importance for hydropower,flood prevention and water resources utilize-tion.The application of remote sensing and Geographic Information System(GIS) techniques in snow cover monitoring and snowmelt runoff calculation in the upper Huanghe River basin are introduced amply in this paper.The key parame-ter-snow cover area can be computed by satellite images from multi-platform,multi-templral and multi-spectral.A clus-ter of snow-cover data can be yielded by means of the classification filter method.Meanwhile GIS will provide relevant information for obtaining the parameters and also for zoning .According to the typical samples extracting snow covered moun-tained in detail also.The runoff snowmelt models based on the snow-cover data from NOAA images and observation data of runoff,precipitation and air temperature have been satisfactorily used for predicting the inflow to the Longyangxia Reser-voir,which is located at lower end of snow cover region and is one of the largest reservoirs on the upper Huanghe River, during late March to early June.The result shows that remote sensing techniques combined with the ground meteorological and hydrological observation is of great potential in snowmelt runoff forecasting for a large river basin.With the develop-ment of remote sensing technique and the progress of the interpretation method,the forecast accuracy of snowmelt runoff will be improved in the near future .Large scale extent and few stations are two objective reality situations in Chian,so they should be considered in simulation and forecast.Apart from dividing ,the derivation of snow cover area from satellite images would decide the results of calculating runoff.Field investigation for selection of the learning samples of different snow patterns is basis for the classification. 相似文献
13.
CHANGLi-ping ZHANGShu-wen 《中国地理科学(英文版)》2002,12(4):373-377
With the astounding development and gradual improvement of remote sensing technology, as an advancedscience technology, it is used to provide multi-temporal, large scope real-time information for land-use dynamic change,and also is one of the best efficient methods for studying the earth resources and environment. Remote sensing image hasits characteristics of ample information and reflecting the objective realities. The paper uses multi-temporal TM images in1986, 1996 and 2000, and relevant statistic data to analyze land-use changes of Dalian City in Liaoning Province of Chi-na over ten years by means of the correlation analysis method. The results have shown that two methods could con-formably reflect the present land-use change. Urbanization is closely correlative to natural factors and economic develop-ment. Especially in recent 20 years, under the influence of the reform and open-up policy, Dalian, as a specific coastcity, is becoming an international metropolis. 相似文献
14.
Triploidy was induced in Chinese shrimpFenneropenaeus chinensis by 30±0.5°C heat shock treatment (initiated at 20 min after fertilization) for 10 min to inhibit the release of PB2 at 18.0°C.
The highest triploid rate obtained was 84.5% in nauplius stage. The effect of heat shock treatment on meiosis and cleavage
of eggs was investigated in this work aimed to establish efficient procedures for triploid induction and to gain understanding
of the mechanism of triploid production. Three pronuclei that could be observed in the treated eggs under fluorescence microscope
developed into triploid embryos. Some abnormal chromosome behavior was observed in heat shocked eggs.
Contribution No. 4407 from the Institute of Oceanology, Chinese Academy of Sciences.
This work was supported by Project under Major State Basic Development Program (G1999012009) and Knowledge Innovation Program
of the Chinese Academy of Sciences (KZCX 2-211) 相似文献
15.
在我国,修编土地利用总体规划、城市总体规划之前,开展对现行规划实施情况的评价,已经纳入规范的工作程序,与之相应,规划实施评价研究逐渐成为关注的焦点。该文首先对国外规划实施评价理论与方法进行简要的介绍,再对国内开展的实证研究进行归纳分类,并做出简要评述,以期为今后的规划实施评价研究提供一些新的视角和参考。 相似文献
16.
17.
沈英 《广东海洋大学学报》2011,31(2)
SCIE论文产出情况可作为一个侧面反映学科研究现状与态势。在SCIE数据库中检索出2000-2009年间海洋学(oceanography)科研论文2 264篇,按国家(地区)、机构、来源出版物、作者与基金资助机构对论文产出与被引频次展开计量分析,为中国海洋学研究者了解海洋学研究现状、开展合作研究、展示科研成果提供帮助。 相似文献
18.
Alpha-glucosidase inhibitors were screened from organic solvent extracts of macroalgae by a spectrophotometrical method with p-nitrophenyl-D-glucopyranosidase as the substrate. The result indicates that orgarlic crude extracts from some macroalgae such as Rhodomela confervoides (Huds.) Silva, Gracilaria textorii(Suringar) DeToni, Plocamium telfairiae Harv., Dictyopteris divaricata (Okam.) Okam, Ulval pertusa and Enteromorpha intestinalis (L.) Link et al. show strong inhibitory activity of alpha-glucosidase at concentration of 79.6 μg/ml. 相似文献
19.
In this study, several methods were compared for the efficiency to concentrate venom from the tentacles of jellyfish Rhopilema esculentum Kishinouye. The results show that the methods using either freezing-dry or gel absorption to remove water to concentrate
venom are not applicable due to the low concentration of the compounds dissolved. Although the recovery efficiency and the
total venom obtained using the dialysis dehydration method are high, some proteins can be lost during the concentrating process.
Comparing to the lyophilization method, ultrafiltration is a simple way to concentrate the compounds at high percentage but
the hemolytic activities of the proteins obtained by ultrafiltration appear to be lower. Our results suggest that overall
lyophilization is the best and recommended method to concentrate venom from the tentacles of jellyfish. It shows not only
the high recovery efficiency for the venoms but high hemolytic activities as well.
Supported by the Award Foundation of Scientific Research for Excellent Young and Middle-age Scientist of Shandong Province
(No. 2006BS07003) and the Knowledge Innovation Project of Chinese Academy of Sciences (KZCX2-YW-R-104) 相似文献
20.
地图学与地理信息系统专业点的分布与研究方向 总被引：3，自引：0，他引：3
李建新 《地球信息科学学报》2006,8(1):26-29
地图学与地理信息系统专业是地理学的二级学科,但其影响已远远超出了地理学的泛地学范围。全国所设学科点以北京、吉林、江苏和湖北最为集中,其大多数安置在地理学或地学等理学院系,目前仅海南、西藏、宁夏、青海 4省区没有设学科点。2005年全国有114所院校招收地图学与地理信息系统专业本科生,其中有师范院校31所、综合院校27所、理工科院校25所、农科院校8所、地质矿业和石油院校6所、林业院校5所、交通院校3所、建筑院校3所、邮电院校2所、信息工程院校2所、水利水电院校1所、经济学院1所;16所院校招收地图学与地理信息系统专业博士生,其中有综合大学6所、师范大学5所、海洋大学1所、中科院研究所4所;2004年全国有54所院校招收地图学与地理信息系统专业硕士生,其中有师范院校18所、综合院校16所、理工科院校3所、农科院校3 所、地质和矿业院校3所、林业院校1所、信息工程院校1所、海洋院校1所、中国科学院8个研究所。硕士专业共有281个研究方向,其中26个方向是地图学方向;博士专业共有126个研究方向,只有1个方向的核心词是地图, 1个方向含有经济一词、1个方向含有旅游一词,绝大多数方向都集中在理工科领域。 相似文献