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对流层延迟误差是GPS定位中的一项主要误差源,一般可采用模型改正或待定参数的方法进行处理。本文首先介绍如何使用WAAS模型进行对流层延迟改正,然后给出一种网络RTK的对流层延迟误差的处理方法,最后通过对实测数据的处理,证明本文方法可有效地用于网络RTK用户对流层延迟实时改正和分析。  相似文献   
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介绍了基于拓普康IS影像3维扫描全站仪获取的点云数据,构造不规则三角网(TIN)计算土石方的功能和特点,并对该系统在齐齐哈尔市碾子山区东海采石场的应用情况进行了详细地介绍和分析。实际应用表明,影像全自动扫描全站仪在矿山开采中具有操作流程更简单,系统效率高,作业时间短,测量结果精度高等特点。  相似文献   
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The dust storms from the continent usually affect the abundance and diversity of planktons by supplying trace elements. As such, the response of heterotrophic planktonic bacteria to dusts, nutrients(i.e., nitrogen and phosphorus) or ferrous dosages was investigated in the Kuroshio Extension region of the Northwest Pacific Ocean(NWPO) through on-board incubation experiments during an oceanographic survey in spring 2014. The flow cytometry and 16S rRNA high-throughput sequencing methods were applied to explore the abundance and community structure of bacteria, and the percentage of high nucleic acid bacteria(HNA%). The results showed that the heterotrophic bacteria abundance was low(average 2.55×10~5 cells mL~(-1)) and subjected to both nitrogen(N) and ferrous(Fe) limitation. Sand-dust deposition observably promoted the activity of heterotrophic planktonic bacteria. The maximum abundance of heterotrophic bacteria was 6.98×10~5 cells mL~(-1) in the dust-dosage group, which was 44% higher than the control(P 0.05). The HNA% in the dust-dosage group was 1.37 times higher than the control(P 0.05). The activation mechanism was mainly related to the dissolution of N and Fe in the dusts. The relative abundance of genus Winogradskyella was significantly increased by dust deposition while the relative abundance of the genera Tenacibaculum and Hyphomonas was decreased. These variations of bacterial community structure were ascribed to the dissolution of nutrients N and P. Comparing the results of different experimental groups, this study concluded that dust storm improved the abundance of heterotrophic bacteria by dissolution of N and Fe.  相似文献   
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吴明 《东北测绘》2012,(10):86-87,90
对GPS网采用全面边连式结构、点连式结构和导线网等三种不同网形进行平差分析,得出结果是:全面边连式GPS网形结构强,点位精度高,适用于高精度工程控制网。点连式GPS网网形结构的点位精度与全面边连式网的精度相当,但点连式GPS网可大大减少野外观测和计算工作量。在满足精度要求的情况下,优化GPS网的网形设计,可减少工作量,大大提高生产效率。  相似文献   
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张太平  王妍  吴明 《东北测绘》2012,(5):208-210
从房地产权属登记制度的基本理论出发,结合我国目前房地产登记制度的立法和司法实践,以及物权法中对不动产登记效力的立法趋势,说明我国房地产权属为登记生效的立法模式。  相似文献   
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吴明  王妍  盛德新 《测绘与空间地理信息》2012,35(9):100-101,105,108
CORS系统的定位精度和可靠性直接关系到系统的可用性和工程建设的安全性,因此必须对系统各个指标进行检测。本文介绍了对CORS常用的定位精度的检测方法:静态已知点检测方法、实时动态观测值与后处理结果比较的检测方法、动态规则几何轨迹检测方法和固定基线长度相对检测方法。  相似文献   
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