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基于遥感技术研究萧山—球川断裂带 总被引：1，自引：0，他引：1
遥感影像不仅从宏观上展现了活动断裂与其它活动构造的影像全貌,而且直观地揭示了活动断裂的影像信息,为分析断裂的活动状态及其与地震活动的相关性,识别发震构造与强震的孕育地段提供了丰富的信息。本文以萧山—球川断裂为例,在地质地貌特征上进行了详细的分析,揭示其几何学和运动学特征。采用图像增强与融合等处理方法,增加了图像的立体感,提高了遥感影像清晰度和解译精度。研究表明:NE向的萧山—球川断裂是杭州地区规模最大的断裂,它既具有早期左旋挤压剪切的特点,同时还具有后期右旋张扭的运动特征,表明该断裂带在各个地段和各个时期表现形式截然不同,对杭州地区古生代以来的地层沉积和构造演化有着直接的控制作用,形成了断裂两侧不同的地层与地貌特征。本次研究成果将对杭州地区大型工程建设、城市规划以及新构造运动的研究有一定的借鉴意义。 相似文献
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基于TM遥感影像的玉米地专题信息自动提取 总被引：1，自引：1，他引：1
TM遥感影像中专题信息的自动提取是目前遥感界的研究热点，也已成为遥感信息生产流程中的瓶颈环节。本文分析了耕地专题信息自动提取的研究现状，选取了吉林中部和辽宁省东北部作为研究区，采用监督分类的方法对研究区TM遥感影像进行分类，提取了玉米地专题信息，玉米地信息的提取精度为85.5%。根据遥感影像目视解译的原理，提出了基于多特征空间的遥感影像专题信息自动提取的研究方法，通过对多特征空间的数学描述和计算机处理实现
遥感专题信息的自动提取。采用多特征空间的方法将玉米地信息分为光谱特征空间、形状特征空间、区域地学特征空间和干扰特征空间，应用ERDAS8.5遥感图像处理软件中的knowledge engineer模块的开发功能，设计了基于多特征空间的玉米地专题信息自动提取的专家库，使用专家库对玉米地信息进行了自动提取，提取精度为92.9%。从基于多特征空间的分类结果与监督分类结果的比较发现，基于多特征空间的自动提取方法可以提高专题信息的提取效率，对未来实现遥感影像的智能解译是一种研究方法的探索。 相似文献
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陈洪义 《内蒙古科技与经济》2012,(16):49-50
在论述遥感信息提取技术理论的基础上,引出了遥感地质构造解译的概念,并对地质构造影像特征进行了描述和地质构造信息进行了提取,结合实例进行分析与研究。 相似文献
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《科技风》2020,(14)
本文以西藏日喀则地区18个县城(区)为研究对象,以无人机航拍0. 2m分辨率影像为基础,在Arcgis平台上叠加无人机获取的DEM遥感数字高程数据,渲染建立三维遥感的图像模型。通过人机交互遥感解译,提取高精度、大比例尺日喀则18个县城(区)周边的地质灾害特征信息以及人类工程活动信息。统计分析表明地质灾害解译结果分布特征与地形地貌关系密切,地质灾害与人类工程活动包括受威胁对象、孕灾背景、地质灾害防护工程相互作用明显。表明了无人机遥感技术在地质灾害调查中的良好的应用效果,特别在地形艰险获高质量影像可代替人员地面到达,三维地形地貌显示对地质灾害个体特征信息提取意义重大。无人机遥感技术在地质灾害调查领域的应用前景广阔。 相似文献
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遥感影像解译样本库数据对于第一次地理国情普查工作有着至关重要的作用,是内业解译图斑的重要作业依据,并为将来的自动化内业解译软件储备基础数据。本文对遥感影像解译样本库数据的制作原理和方法进行了初步的探讨。 相似文献
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杨清华 《科技成果管理与研究》2015,(5)
全球地质矿产与资源环境卫星遥感“一张图”工程是国外矿产资源风险勘查专项项目,由中国国土资源航空物探遥感中心组织全国省级遥感队伍、行业遥感部门和高等院校等遥感单位百余名科技人员,在三年时间内,利用不同分辨率卫星遥感数据、卫星重力数据,按统一编制的遥感地质矿产解译技术标准、技术流程和成果图件制作标准,完成了全球14900万平方千米范围1：500万遥感地质矿产解译,全球1：500万植被、碳酸岩分布等生态地质环境因子解译,非洲4030万平方千米和南美洲1800万平方千米1：500万卫星重力资料收集与分析,中亚五国等重要资源型国家1400万平方千米范围的1：100万遥感地质矿产解译,形成了全球、各大洲1：500万遥感解译专题图件及数据库,资源型国家1：100万遥感地质矿产解译专题图件及数据库。在此基础上,开展了全球地质构造、造山带、火山机构、陨石坑、典型矿床等遥感特征分析及其成矿规律研究,在对全球8597个大型-超大型矿床遥感识别与影像特征分析的基础上,建立了9类典型矿产全球遥感地质找矿模型,圈定了成矿影像单元47个,找矿战略选区73处,为国家境外矿产资源战略部署提供了依据。项目执行期间,为国家走出去企事业单位提供了大量遥感图像和解译成果,发挥了地质调查成果公益性服务的作用。 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献