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文章介绍地理国情普查内容为地表覆盖和地理国情要素,主要工作在于内业工作,而内业工作对于所给的影像解译越细致,正确率越高,外业工作任务就会轻松许多,从而大大缩短整个普查过程、提高普查效率、节省人力物力及有效保证产品质量。因此,对内业分类解译正确性统计和分析是检验内业成果的重要手段和有效措施。 相似文献
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《新疆师范大学学报(自然科学版)》2017,(1)
文章通过研究第一次全国地理国情普查工作中国家制定的相关技术要求,结合干旱区自然条件和区域发展特色,以占我国干旱区面积一半以上的新疆维吾尔自治区为例,进一步对国情监测时内业目视解译地表覆盖影像数据中常见的误差对象、干旱区特色地表覆盖误差来源、判别方法与易混淆地物所造成的误差加以总结,旨在为具有干旱区地方特色的各种不同用途、比例尺和类型的遥感影像目视解译提供参考。 相似文献
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地理国情普查的开展,促使地表覆盖信息提取技术向智能化、高效化发展;以西藏地区作为研究区域,选用2011年11月空间分辨率为0.5 m的WorldView_2影像作为数据源,采用目视解译、计算机自动解译、计算机人工交互解译3种遥感信息提取方法进行土地覆盖信息提取;通过实验对比分析,3种解译各具优势与不足,分类结果精度与遥感影像质量与解译区地形复杂程度和目标地物种类息息相关,在地理国情普查过程中需要综合使用. 相似文献
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通过利用测区内已有的高分辨率航空影像,经过降低分辨率处理,制作成0.5 m分辨率的正射影像,用于地理国情普查内业地表覆盖和国情要素采集,以及外业调查的工作底图。经过试生产及精度评定,证明该正射影像精度高、影像清晰,能够达到地理国情普查项目的要求。 相似文献
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地表覆盖作为能够反映土地覆盖类型、物质种类、及其自然特点等重要信息的重要方法,在地理国情普查中居于举足轻重的地位,是地理国情普查体系中重要内容。重要地理国情要素信息反映与社会生活密切相关、具有较为稳定的空间范围或边界、具有或可以明确标识、有独立监测或统计分析意义的重要地物或其属性。基于此,该文对地理国情普查地表覆盖分类和要素信息的提取策略进行粗浅的探讨,供相关专业从业人士实践参考。 相似文献
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该文通过深入研究国家制定的《第一次全国地理国情普查总体方案》等相关技术要求,结合天津市的自然条件和社会发展现状,以天津市北闸口镇为实例,进一步分析了该地区1∶2000系统数据和遥感影像数据的实际情况,对于内业影像解译时易混淆地物的区分方法做了详细的描述。 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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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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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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As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献
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《吉林大学学报(理学版)》2014,(5):1105
<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has 相似文献