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Experimental Application of Intelligent Robot Technology in Antarctic Scientific Expedition 总被引:1,自引:0,他引:1
Intelligent robot technology has great potential for application in polar scientific expedition. During the 24th Chinese Antarctic Expedition in the summer of 2007/08, our ice-snow surface mobile and the low-flying robots were successfully employed for the first time in the Antarctic. This paper firstly gives a brief introduction to the intelligent robot technology developed abroad and used in the Antarctic, then focuses on the ice-snow surface mobile and the low-flying robots developed by China as well as their field trials in the Antarctic. Moreover, the authors have considered the potential demand for the intelligent robot technology in China's Antarctic scientific expedition, in the hope of providing some reference for the future development of robot technologies. 相似文献
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Ship-borne infrared radiometric measurements conducted during the Chinese National Arctic Research Expedition(CHINARE) in 2008, 2010, 2012, 2014, 2016 and 2017 were used for in situ validation studies of the Moderate Resolution Imaging Spectroradiometer(MODIS) sea ice surface temperature(IST) product.Observations of sea ice were made using a KT19.85 radiometer mounted on the Chinese icebreaker Xuelong between July and September over six years. The MODIS-derived ISTs from the satellites, Terra and Aqua, both show close correspondence with ISTs derived from radiometer spot measurements averaged over areas of 4 km×4 km, spanning the temperature range of 262–280 K with a ±1.7 K(Aqua) and ±1.6 K(Terra) variation. The consistency of the results over each year indicates that MODIS provides a suitable platform for remotely deriving surface temperature data when the sky is clear. Investigation into factors that cause the MODIS IST bias(defined as the difference between MODIS and KT19.85 ISTs) shows that large positive bias is caused by increased coverage of leads and melt ponds, while large negative bias mostly arises from undetected clouds. Thin vapor fog forming over Arctic sea ice may explain the cold bias when cloud cover is below 20%. 相似文献
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2012年11月—2013年4月中国第29次南极科学考察期间,针对南极夏季固定冰单轴压缩性质开展了研究。使用冰芯钻直接在平整冰层钻取力学试样,取样冰厚为149 cm,其中颗粒冰、柱状冰和片状冰分别占采样冰芯总长度的15.4%、72.5%和12.1%;单轴压缩试样只采用柱状冰部分,加工好的力学冰样尺寸为直径9 cm,长度为18 cm;共设置5个试验温度(-2、-4、-6、-8和-10℃),加载应变速率在10-6—10-2s-1。利用统计方法分析试验结果,建立了南极夏季海冰单轴压缩强度与孔隙率和应变速率的关系式,以及综合考虑应变速率和温度影响下的单轴压缩强度定量表达式;同时,基于分形理论对单轴压缩试样破碎块分布规律进行了分析,结果显示碎块长度分形维数随着温度和应变速率的降低有增大趋势。在特别低应变速率下海冰试样整体发生蠕变时,无法采用分形方法讨论海冰内部破碎程度。 相似文献
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利用中国第27、28、29和31次南极科学考察期间在普里兹湾海域获取的水文观测数据,分析了该海域的水团分布、夏季表层水年际变化及其原因和绕极深层水涌升的年际变化特征。研究发现:第27和31航次观测到的夏季表层水的温盐范围较大;第27航次观测到的夏季表层水温度相对较高,可达1.22℃;第29航次观测期间海冰较少,夏季表层水的厚度约为50 m(73.00°E、75.50°E和67.25°S断面),第31航次观测到的夏季表层水最深达到100 m;第28和29航次观测到较为明显的绕极深层水涌升,在73.00°E断面尤为突出;观测到的绕极深层水在第28航次向上涌升到90 m,在第29航次向南延伸较远,达到67.67°S;湾内气旋性环流对绕极深层水的涌升有明显的输运作用。 相似文献
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在行星地转框架下研究了具有弱耗散的南大洋的低频长Rossby波海盆本征模。本征模的本征函数具有倾斜的特点。最小耗散模的周期是由海盆中最慢的Rossby波从东边界传到西边界所需要的时间确定的,而其他模的本征频率是最小耗散本征模的本征频率的整数倍。最小耗散本征模的周期对耗散系数和大陆的南北平移不敏感,而半衰期对这2个参数比较敏感。另外,最小耗散本征模的周期和半衰期都对德雷克海峡的关闭或打开较敏感。通过假定科氏参数为β0的线性函数,发现本征函数的倾斜方式和周期都随着f0和β0变化,而半衰期在耗散系数不变的情况下基本是不变的。进一步验证了海盆模的本征函数的倾斜方式与斜压Rossby波传过海盆的时间有关。 相似文献
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