排序方式： 共有41条查询结果，搜索用时 15 毫秒
31.
VRS-GPS网络PTK技术 总被引：2，自引：0，他引：2
随着高科技的不断发展,RTK—GPS技术在实际应用中已有一定的局限性,VRS—GPS网络RTK技术的出现克服了它的局限性。本文叙述了VRS—GPS网络RTK技术的系统组成、工作原理、优越性及其精度评估。 相似文献
32.
Suhail Al Madani Balqies Sadoun Omar Al Bayari 《International Journal of Communication Systems》2016,29(6):1046-1056
Recently, there is an increased interest in surveying applications based on Continuously Operating Reference Station (CORS) technology in the Kingdom of Saudi Arabia (KSA). Jeddah Municipality has started operating the first CORS network in KSA since 2007. This work discusses the new technologies used in Jeddah CORS network, the obtained accuracy and addresses, the different applications covered by CORS network such as cadastral surveying, road surveying, Lidar, among others. Moreover, the work presents the determination of the different transformation parameters between ITRF/WGS84 coordinate system and the local coordinate systems used in KSA. The purpose is to improve the communication abilities in order to operate modern smart cities. With full coverage and high accuracy of locations, Geographic Information System (GIS) and 3D models will be created to operate all aspects of life starting from the inside (the houses) and ending with saving the environment and the energy. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
33.
网络RTK在工程测量中的应用及误差分析 总被引：1，自引：0，他引：1
随着全球卫星定位技术、计算机技术、网络和通讯技术的迅速发展,网络RTK技术已日益成熟,其应用范围也日益扩大,网络RTK在相关工程测量中的应用也越来越普及,其高效率、高精度、高可靠性赢得了广大测绘工作者的青睐。本文对目前已广泛应用的网络RTK技术进行介绍,并对其原理、应用、发展及误差进行探讨。 相似文献
34.
在研究和分析现有各种LED显示屏控制电路的基础上,提出一种基于串行FRAM存储器的LED显示屏控制系统。该系统以51系列运行速度为40MIPS的单周期高速VRS51L3074单片机为控制核心,利用串行FRAM存储器组成双端口RAM,实现对LED显示屏的控制;并以2048×192点阵双色LED显示屏为实例,说明其如何在实际中应用。 相似文献
35.
介绍了GPS RTK的工作原理和RTK系统的组成，并阐述了流动站工作范围与RTK定位精度的关系，对RTK的初始化过程、RTK相对于静态定位增加的设备及应用、基准站与流动站信号传输过程作了详细的说明。最后阐述7VRS的系统构成及工作原理以及VRS的优越性。 相似文献
36.
采用了目前较流行的制备模板的方法,将预处理过的铝箔采用二步阳极氧化法分别在硫酸和草酸电解液中制备AAO膜,压差(VRS)法剥离铝基体后,得到了孔径大小基本一致、有序度较高的氧化铝模板.用透射电子显微镜对多孔氧化铝阵列模板进行表征分析,讨论阳极氧化电压与氧化时间对AAO孔膜形态的影响. 相似文献
37.
基于VRS51L3074的三表数据采集系统 总被引：1，自引：0，他引：1
VRS51L3074是Ramtron发布的全球第一款在8051MCU内核巾嵌入了FRAM、SRAM、FLASH三种存储器的高性能系统级芯片,在介绍VRS51L3074芯片工作特性的基础上,提出了该芯片在住宅小区三表数据采集系统中的应用方案,讨论了系统的硬件结构,给出了部分应用软件代码. 相似文献
38.
In spite of the high-performance characteristics of a solid oxide fuel cell/gas turbine (SOFC/GT) hybrid system, it is difficult to maintain high-level performance under real application conditions, which generally require part-load operations. The efficiency loss of the SOFC/GT hybrid system under such conditions is closely related to that of the gas turbine. The power generated by the gas turbine in a hybrid system is much less than that generated by the SOFC, but its contribution to the efficiency of the system is important, especially under part-load conditions. Over the entire operating load profile of a hybrid system, the efficiency of the hybrid system can be maximized by increasing the contribution of power coming from the high efficiency component, namely the fuel cell. In this study, part-load control strategies using air-bypass valves are proposed, and their impact on the performance of an SOFC/GT hybrid system is discussed. It is found that air-bypass modes with control of the fuel supply help to overcome the limits of the part-load operation characteristics in air/fuel control modes, such as variable rotational speed control and variable inlet guide vane control. 相似文献
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40.
虚拟参考站(VRS)技术在宁波的应用前景初探 总被引：3，自引：0，他引：3
本文介绍了VRS技术的概念、工作原理、关键技术以及其相对常规RTK技术的优势,并详细描述了建立宁波市连续运行卫星定位系统的初步设想. 相似文献