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加速测绘科技进步促进测绘事业发展国家测绘局局长金祥文全国测绘科技大会今天在这里开幕了。首先请允许我代表国家测绘局向出席本次大会的各位专家和代表表示热烈欢迎，向奋战在测绘科技战线上的广大测绘科技工作者表示问候和敬意。去年５月，党中央、国务院召开了全国... 相似文献
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本文指出改革开放以来,我国测绘事业得到较快的发展,但测绘技术市场还存在一些问题。提出发展测绘事业,要转变观念,完善法规,积极培育和发展测绘技术市场。 相似文献
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本文介绍欧美军事测绘在科索活战争中的最新发展概况,分析和归纳出了现代军事测绘保障的特点：超前的军事地理信息和环境要素保障、面向精确制导武器和作战收音机的测绘保障和敢于运用军事测绘保障新技术,并对我军军事测绘保障今后发展中诮加强的几方面工作,提出了若干建议。 相似文献
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论测绘工程专业学生技术素质的培养 总被引：1，自引：0，他引：1
根据测绘科学技术发展的技术特征,阐述模拟化测绘和数字化测绘、展望信息化测绘三个阶段的测绘技术人员应具备的基本素质,供测绘教育工作者在测绘工程专业学生的培养中参考。 相似文献
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基础测绘已正式列入国家的国民经济和社会发展年度计划,通过立法确立基础测绘的定期更新投入机制,使各级政府为加强基础测绘提供必要的财务保障,是测绘法制建设的重要组成部分。基础测绘只能依靠加强法制建设使其顺利发展。 相似文献
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加快基础测绘宣传的力度,用好用活基础测绘的经费,确保基础测绘计划的落实,从优化结构,提高素质,增强实力等方面入手,使广西测绘局的测绘工作怀全国同行业测绘事业的发展同步。 相似文献
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本文结合杭州市房产测绘实际情况，从完善房产测绘法规、成立房产测绘鉴定机构以及建全测绘差错赔偿制度三个方面来探讨房产测绘纠纷的解决之道。 相似文献
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《International Journal of Digital Earth》2013,6(1):80-87
Abstract Cultures throughout the world are associating with the rivers. People depend upon the rivers and their tributaries for food, water, transport, and many other aspects of their daily lives. Unfortunately, human beings have not calculated the accurate lengths for the great rivers even today. The lengths of the rivers are very different in popular textbooks, magazines, atlases and encyclopedias, etc. To accurately determine the lengths of the principal rivers of the world, the combination of satellite image analysis and field investigations to the source regions is proposed in this paper. The lengths of the Nile, Amazon, Yangtze, Mississippi, Yellow, Ob, Yenisey, Amur, Congo and Mekong, with lengths over or close to 5000 km, were calculated using the proposed method. The results may represent the most reliable and accurate lengths of the principal rivers of the world that are currently achievable. 相似文献
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软科学这一术语是70年代在国外提出的.然而30多年以来,它在国外不仅未得到普遍的承认,而且对软科学的定义也还未能达成大体上一致的共识.而在改革开放后的中国,出于决策科学化和民主化的需要,经过一些领导人的提倡和支持,特别是通过1986年召开的软科学座谈会及1994年召开的全国软科学工作会议,软科学事业得到了蓬勃的发展.据初步统计,截止1998年底全国共有软科学研究机构1224个,研究人员32655人,初步形成了一支较为强大的研究队伍,并取得了数百项覆盖多个领域的研究成果,为支持各级各类的决策发挥了一定的作用. 相似文献
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Tobias Nilsson Benedikt Soja Kyriakos Balidakis Maria Karbon Robert Heinkelmann Zhiguo Deng Harald Schuh 《Journal of Geodesy》2017,91(7):857-866
The very long baseline interferometry (VLBI) Intensive sessions are typically 1-h and single-baseline VLBI sessions, specifically designed to yield low-latency estimates of UT1-UTC. In this work, we investigate what accuracy is obtained from these sessions and how it can be improved. In particular, we study the modeling of the troposphere in the data analysis. The impact of including external information on the zenith wet delays (ZWD) and tropospheric gradients from GPS or numerical weather prediction models is studied. Additionally, we test estimating tropospheric gradients in the data analysis, which is normally not done. To evaluate the results, we compared the UT1-UTC values from the Intensives to those from simultaneous 24-h VLBI session. Furthermore, we calculated length of day (LOD) estimates using the UT1-UTC values from consecutive Intensives and compared these to the LOD estimated by GPS. We find that there is not much benefit in using external ZWD; however, including external information on the gradients improves the agreement with the reference data. If gradients are estimated in the data analysis, and appropriate constraints are applied, the WRMS difference w.r.t. UT1-UTC from 24-h sessions is reduced by 5% and the WRMS difference w.r.t. the LOD from GPS by up to 12%. The best agreement between Intensives and the reference time series is obtained when using both external gradients from GPS and additionally estimating gradients in the data analysis. 相似文献
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In this letter, we are trying to resolve the electromagnetic problem for the movements of the superconducting particles of the protoplanetary cloud in the magnetic field of Saturn. The force of levitation (Meissner-Ochsenfeld phenomenon) is introduced to the field of planetary science for the first time. It is shown from our theoretical analysis that rings of Saturn might have a superconducting origin, and rings might levitate within magnetic equator plane of the planet. 相似文献
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根据残差二次型次小与最小之差进行整周模糊度确认的关键是差值的分布,只有得到了合理的差值分布才可确定合理的界值.文中基于原有的两种方法及这两种方法的不足,从理论上导出了满足条件的差值分布,并作了一定的说明. 相似文献
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