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为了探索利用遥感图像快速更新矢量地形图的方法,在深入研究了ERDAS IMAGINE矢量模块功能的基础上,利用试验区遥感图像和现有矢量地形图,将二者进行了高精度的配准,并以栅格图像为参照,对矢量图层的空间数据进行了更新,总结了利用ERDAS IMAGINE矢量模块结合遥感影像进行矢量图形更新的经验与方法.结果表明:与传统的地形图更新方法相比,该方法在更新中小比例尺地形图方面具有更新效率高、更新成本小等突出优势,充分体现了RS与GIS的集成应用.该成果对地理信息系统数据库建设与快速更新具有一定的参考价值. 相似文献
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<正>本文介绍了全球定位系统(GPS)、地理信息系统(GIS)、遥感(RS)等三大技术在数据的获取与处理上的各自特点,并结合江苏省盐城市水域调查,阐述了在水域调查矢量采集和后续水域数据更新中以GPS为基础升级的网络RTK技术可作为外业数据获取的主要手段;GIS数据处理功能强大,技术人员可以利用其强大的数据分析功能,快速查询到水域的空间位置信息、基础信息,并对其进行分析;RS可以快速、便捷地获取较大范围内监测区域的影像数据。 相似文献
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遥感信息不确定性度量 总被引:2,自引:0,他引:2
从概率论、模糊集和粗糙集的角度提出基于像元、目标和影像三个层次的不确定性度量指标.这些指标有利于跟踪误差和对不确定性的传递研究,同时为遥感数据和G IS集成或信息提取等操作提供可靠性评价手段. 相似文献
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利用支持向量机方法研究GPS和雷达系统对机动目标联合测量中的数据融合问题.使GPS数据经时间配准处理与雷达数据达到时间同步,再经空间配准和坐标系变换后进行卡尔曼滤波,将滤波估计坐标值作为支持向量机的输入,以支持向量机为同步融合中心,输出为目标轨迹的融合估计值.仿真结果表明,这种方案可以达到比融合前数据更贴近真实值的效果. 相似文献
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在分析安徽省太和县Landsat卫星2003年4月16日轨道号122037的TM遥感影像数据特征的基础上,利用遥感与地理信息系统软件处理遥感影像的方法,对图像数据进行几何校正和融合处理,采用遥感图像多源信息复合、人机交互解译与GIS技术相结合的解译方法,实现中药材种植面积的提取,获得了理想的结果,使相关的决策层以及种植户可以充分了解相关信息,为规划者和决策者提供了一种更加科学客观的新手段。 相似文献
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为有效实现成都地区生态环境监测,利用RS、GIS和GPS技术,以成都地区2005年中巴资源卫星(CBERS-02)遥感影像为信息源。2000年TM遥感影像解译数据为基础,对2005年遥感影像进行解译,修改2000年数据库;利用GPS手持接收机,在野外对解译成果进行验证,更新数据库;利用GIS空间分析功能,提取出2000-2005年期间成都地区土地利用/覆被变化信息。最后对2000-2005年期间成都地区土地利用/覆被变化信息进行分析,研究表明成都地区退耕还林还草成绩有限,同时城镇扩张迅速,建筑用地急剧增加。 相似文献
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Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
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The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation. 相似文献
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Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well. 相似文献
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QING Hai-ruo 《成都理工大学学报(自然科学版)》2004,31(6)
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction. 相似文献
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Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
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Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system. 相似文献
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以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性. 相似文献
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YUJia-shun HEZhen-hua 《成都理工大学学报(自然科学版)》2004,31(6):694-698
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod… 相似文献
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理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
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Quantitative trait loci (QTLs) for quality traits related to protein and starch in wheat 总被引:2,自引:0,他引:2
Haiyan Sun Jianhua Lü Yuding Fan Yan Zhao Fanmei Kong Rijun Li Honggang Wang Sishen Li 《自然科学进展(英文版)》2008,18(7):825-832
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D. 相似文献