共查询到20条相似文献，搜索用时 109 毫秒
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测绘技术是国民经济建设和社会发展中一项前期性、基础性和公益性的重要工作,是构成地理信息产业的基础。他为国民经济和社会发展各领域、各部门提供与地理位置有关的各种专题性和综合性的基础信 相似文献
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本文阐述了地理信息产业的概念和内容,分析了地理信息产业在国民经济建设中的战略地位及对国民经济建设的辐射渗透作用,提出了测绘业向地理信息产业转化的要求和途径. 相似文献
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阐述了地理信息产业的内涵和特点,介绍了国内外发展现状与发展趋势,及地理信息产业发展在国民经济建设中的地位和作用。提出湖南省地理信息产业的主要问题、发展对策,以及发展地理信息产业的的思考。 相似文献
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地理信息产业作为信息产业的重要组成部分,在经济和社会发展中有着重要的作用。本文就如何加强我国地理信息产业的发展谈几点看法。 相似文献
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我国地理信息产业近年来发展势头良好,规模迅速扩大。然而,对地理信息产业的准确内涵、产业在国民经济中的分类等的认识尚不统一,同时,缺乏地理信息产业的统计指标,这势必影响有关地理信息产业的统计和规划的开展,以及地理信息市场的监管等。为解决上述问题,统一认识,本文对地理信息产业的内涵、分类及统计指标进行了分析和探讨。 相似文献
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刘许生 《国土资源导刊(湖南)》2014,(8)
正对于地理信息产业而言,2014年无疑是政策利好而值得特写的一年。继年初国务院发布《关于促进地理信息产业发展的指导意见》之后,近日,国家发展改革委、国家测绘地理信息局又发布了《国家地理信息产业发展规划(2014-2020年)》。《规划》提出,到2020年,产业保持年均20%以上的增长速度,2020年总产值超过8000亿元,成为国民经济发展新的增长点。这一地理信息产业首个国家层面规划的出台,让业界备受鼓舞。 相似文献
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刘许生 《国土资源导刊(湖南)》2014,(8):20-24
对于地理信息产业而言,2014年无疑是政策利好而值得特写的一年。继年初国务院发布《关于促进地理信息产业发展的指导意见》之后,近日,国家发展改革委、国家测绘地理信息局又发布了《国家地理信息产业发展规划（2014-2020年）》。《规划》提出,到2020年,产业保持年均20％以上的增长速度,2020年总产值超过8000亿元,成为国民经济发展新的增长点。 相似文献
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1地理信息系统软件在地理信息产业中的地位与作用1.1地理信息系统在国民经济中的地位传统的纸质地图和文字资料曾经在国民经济和国防建设中起着十分重要的作用,人 相似文献
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中国西部开发对西部地理信息基础设施建设提出了迫切要求。优先发展在西部大开发中具有关键作用的地理信息系统,积极培育地理信息技术市场,建设一支服务于西部大开发地理信息产业化队伍,尽快制定适应西部大开发的地理信息产业发展规划,协调解决地理信息的标准化,对发展西部地理信息产业、促进西部大开发具有战略意义。 相似文献
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地理信息科学大学联盟（UCGIS）于2006年9月正式发布了《地理信息科学与技术知识体2006（GIS＆T BoK 2006）》,该书是第一部全面系统地表述地理信息科学与技术学科组成、劳动力市场需求、从业人员能力素质要求以及知识体内容等的专著,表达了编者们对当今地理信息科学与技术知识体的一种广泛认知和共识。研究和分析UCGISGIS＆T知识体的思想方法、教学理念、知识体的内容等具有重要的现实意义。为此,作者对该知识体文本进行了长期的跟踪和研究。本文着重剖析该知识体的形成、学术价值、内容组成、主兽特点．以期能对我国地弹信息科学与桔术学科的课程规划、教育教学改革等提供借鉴。 相似文献
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针对GI/M/1排队模型可能出现的影响因素,研究具有负顾客的GI/M/1工作休假及休假中止模型.其服务规则为先到先服务,休假策略为空竭服务多重休假,负顾客抵消队尾的正顾客。若休假期中一个服务完成时,系统中还有顾客,发生休假中止。通过矩阵几何解方法求得到达时刻队长的稳态分布. 相似文献
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"Warming hiatus" occurred in the AltaySayan Mountain Region, Siberia in c. 1997–2014. We analyzed evergreen conifer(EGC) stands area(satellite data) and trees(Siberian pine, Pinus sibirica Du Tour, Siberian fir, Abies sibirica Ledeb.) growth increment(dendrochronology data) response to climate variables before and during the hiatus. During the hiatus, EGC area increased in the highlands(1000 m)(+30%), whereas at low and middle elevations(1000 m. a.s.l.) the EGC area decreased(-7%). The EGC area increase was observed on the rain-ward northwest slopes mainly. In highlands, EGC area increase mainly correlated with summer air temperature, whereas at low and middle elevations EGC area decrease correlated with drought index SPEI and vapor pressure deficit(VPD). EGC mortality(fir and Siberian pine) in lowland was caused by the synergy of water stress(inciting factor) and barkbeetle attacks(contributing factor). Tree growth increment(GI) dynamics differs with respect to elevation. At high elevation(1700 m) GI permanently increased since warming onset, whereas at the middle(900 m) and low elevations(450 m) GI increased until c. 1983 yr. with followed depression. That GI "breakpoint" occurred about a decade before hiatus onset. In spite of growth depression, during hiatus GI was higher than that in pre-warming period. At high elevation, GI positively responded to elevated June temperatures and negatively to moisture increase(precipitation, root zone moisture content, VPD, and SPEI). At low elevation GI negatively responded to June temperatures and positively to moisture increase. For both, low and high elevation, these patterns persisted throughout the study period(1967–2014). On the contrary, at middle elevations GI dependence on climate variables switch after breakpoint year(1983). Before breakpoint, June air temperature(positive correlation) and moisture(negative correlations) controlled GI. Further temperature increase leads GI depression and switched correlation signs to opposite(from positive to negative with temperature, and from negative to positive with moisture variables). 相似文献
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Eighteen agar media were tested for the culture of gut-associated bacteria from farmed adult turbot(Scophthalmus maximus),including 16 agar media with or without 1% gastrointestinal(GI)supernatant,or with 2% or 4% GI supernatant.A total of 1 711 colonies were analyzed and 24 operational taxonomic units(OTUs)were identifi ed.The greatest bacterial diversity was isolated on Zobell 2216E/Zobell 2216E+ agar media,whereas MRS/MRS+ agar media produced a low diversity of colonies.Agar media with GI supernatant(1%,2%,or 4%)showed increased diversity and yielded different profi les of OTUs from the corresponding original media,suggesting that GI supernatant provides substances that enhance the culture effi ciency of bacteria from the turbot GI tract.The large majority of the colonies(82%)were γ-Proteobacteria,whereas 15.6% and 2.4% of colonies were Firmicutes and Actinobacteria,respectively.At the genus level,49.4% of all colonies were assigned to Vibrio.Other potential pathogens,including Pseudomonas,Photobacterium,and Enterobacter,and potential probiotics,including Bacillus,Paenibacillus,and Pseudomonas,were also isolated on agar media.Most cultured bacteria belonged to species that were fi rst described in the turbot GI tract.The impact of these species on turbot physiology and health should be investigated further. 相似文献
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Aircraft industry is very important to the economy and security of a country, and aircraft industry clusters have already
existed in the world. Based on Input-Output data and Czamanski’s method, the aircraft industry clusters in China and USA were
identified quantitatively in this paper. Furthermore, this article carried out comparison analyses of the identification results.
The research finds out: 1) a mature aircraft industry cluster would be generally composed of 7 industrial subgroups, including
aircraft industry, metal making and products manufacturing industry, machinery and equipment industry, electronics industry,
automobile industry, material industry and others, and electronics industrial subgroup will play a more and more important
role in the cluster; 2) in the range of industry-covering, the level of industry-linkage, and the economic performance, there
is a tremendously large gap between the aircraft industry cluster of China and that of USA; 3) the spatial evolution of these
clusters or centers is highly consistent with the diffusion of a country’s industrialization. Finally, based on those findings,
the paper gives some advice on how to improve Czamanski’s method and what China should do to develop its own competitive aircraft
industry: 1) China should employ institutional innovation, and turn to be market-oriented; 2) China should abandon the traditional
pattern of closed-development, and strengthen the interaction and collaboration between aircraft industry and related industries,
especially the electronics industry; 3) China should rectify and perfect its spatial development planning of aircraft industry. 相似文献
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我国地理信息产业发展特征 总被引：7，自引：0，他引：7
本文通过相关文献和数据收集,从政策、市场、企业、产品等方面,对我国地理信息产业发展现状与特征进行了简单综述。我国地理信息产业正处在诞生阶段,市场规模较小,但发展迅速,潜力巨大。在产业结构和区域布局上,地理信息产业发展不平衡。数据产业已成为产业发展的瓶颈,软件产业和地理信息集成服务极具发展潜力。从产业发展的主导因素看,政府在地理信息产业发展中起着关键作用;从产业发展的推动力来看,地理信息技术储备不足,亟待创新。 相似文献
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Noroviruses (NoVs) are widespread causes of nonbacterial gastroenteritis. Outbreaks of NoVs caused diseases are commonly ascribed to the consumption of contaminated shellfish. The concentration and RNA extraction of NoVs are crucial steps of detecting NoVs in shellfish. This study aimed to select a simple, rapid and highly efficient recovery method of NoVs detection with real-time RT-PCR. Four methods of recovering GI.3 and GII.4 NoVs from spiked digestive tissues of oysters and clams, respectively, were compared, of them, the method involving proteinase K and PEG 8000 was found the most efficient. With this method, 9.3% and 13.1% of GI.3 and GII.4 NoVs were recovered from oysters and 9.6% and 12.3% of GI.3 and GII.4 NoVs were recovered from clams, respectively. This method was further used to detect NoVs in 84 oysters (Crassostrea gigas) and 86 clams (Ruditapes philippinarum) collected from 10 coastal cities in China from Jan. 2011 to Feb. 2012. The NoVs isolation rates were 10.47% of clams (9/86) and 7.14% of oysters (6/84). All the detected NoVs belonged to genotype GII. The NoVs recovery method selected is efficient for NoVs detection in oysters and clams. 相似文献
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