共查询到20条相似文献，搜索用时 93 毫秒
1.
2.
航天任务实时3维可视化仿真 总被引：1，自引：0，他引：1
提出了基于对象层次结构的3维几何模型和运动模型建模方法,解决了复杂航天器建模过程中的几何形状的表示问题,并且实现了航天器运动特性的表达与航天器内部部件的运动建模;对实现航天任务3维可视化仿真所涉及到的软件框架、技术方法等作了详细的论述.最后,给出了应用该技术建立的软件在实际应用中的几组试验结果.这些结果表明这项技术能为航天任务的顺利完成提供较好的可视化保障,可以广泛应用于各种航天任务. 相似文献
3.
对航天测控领域引入GPS技术应用于载人航天工程中着陆场系统搜索救援工作的必要性进行了讨论；简述了研制《载人航天任务主着陆场搜索救援辅助决策系统》的目的和意义及系统设计的总体思想、技术途径；系统地描述了系统的功能；同时，也介绍了系统在实战任务中实际应用的情况。 相似文献
4.
阐述了国内外航天测量系统的发展脉络,指出了天基测量是航天测量系统发展的趋势和北斗卫星导航系统应用的重要意义。通过分析未来航天任务应用需求,探讨了我国天基测量系统发展目标和总体思路,规划了天基测量系统的技术体系结构,分析了关键技术问题,探索我国天基测量系统的发展道路。 相似文献
5.
6.
中国地理信息系统技术的发展 总被引：5，自引：0，他引：5
中国是一个发展中的大国，地理信息系统在中国应用非常广泛。中国的地理信息系统技术发展过程中，采取了两条腿走路的策略，一是引进国外地理信息系统软件和技术；二是支持和扶植国产地理信息系统软件的研究开发，推广国产地理信息系统软件的应用。本文详细回顾了中国地理信息系统技术的发展历程，综合介绍国产地理信息系统软件的研究开发状况和应用情况，重点介绍了国产地理信息系统软件－GeoStar的技术特点和市场潜力。 相似文献
7.
在'98国产 GIS软件测评中,武汉吉奥信息工程公司研制的Internet GIS-GeoSurf获得了测评组的一致好评.作为国家科技部惟一表扬和推荐的国产Internet GIS-GeoSurf产品,一年来,我们以发展民族Internet GIS为己任,以"用户至上"为宗旨,和国内外同行联合开发了用于投资环境评估、省情信息发布、房地产信息发布、规划办公自动化等一系列应用系统. 相似文献
8.
9.
10.
林登·约翰逊航天中心 (Lynd B.Johnson Space Center) 位于得克萨斯州休斯敦东南35千米的克利尔湖畔。该处原为一个牧场,1961年美国国家航空航天局在此建立了载人航天飞行中心。该中心占地656公顷。1973年,为纪念逝世的美国第36任总统林登·约翰逊, 美国国会通过决议将此命名为林登·约翰逊航天中心。其任务是训练航天员,操纵和设计宇宙飞船,试验航天设备,控制飞行的空间计划和探测太空奥妙,航天中心由研究中心,指挥控制中心,航天员训练中心以及大型展览馆四部分组成。约翰逊航天中心 相似文献
11.
采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
12.
13.
ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
14.
Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
15.
GNSS系统及其技术的发展研究 总被引：3，自引：1，他引：2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
16.
17.
“4D”技术及其应用 总被引：13，自引：0，他引：13
介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
18.
《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献
19.
Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献