利用有理函数模型实现IKONOS影像的单片定位   总被引：2，自引：1，他引：2  

赵泳  张保明  郭海涛  翟辉琴 《海洋测绘》2005,25(4):44-46

分析了利用高分辨率卫星CCD影像进行单片测图的意义，介绍了目前有理函数模型在影像定位方面的应用情况，重点研究了一种利用有理函数模型实现单片定位的方法，即将有理函数模型的正解形式线性化并组成方程组，结合DEM数据，对方程组迭代求解以获取地面点坐标。实验结果表明该方法具有解算精度高和易实现等特点。  相似文献   

白垩纪与第三纪分界处的高分率叶化石记录     

John.  KR 陶鲁 《海洋地质译丛》1990,(2):F003-F003,F004

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海沟中的动力平衡：一有用的分析工具     

Moun.  NP 张留琴 《海洋地质译丛》1997,(4):78-80,F003

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Contamination of organotin compounds and imposex in molluscs from Vancouver,Canada     

Horiguchi T  Li Z  Uno S  Shimizu M  Shiraishi H  Morita M  Thompson JA  Levings CD 《Marine environmental research》2004,57(1-2):75-88

Gastropods and bivalves were collected at 15 sites at Vancouver and Victoria, Canada between 24 May and 7 June, 1999, to establish tissue concentrations of butyltin and phenyltin compounds, to record imposex symptoms in gastropods, and to assess the present status of organotin contamination around Vancouver. No neogastropods (such as Nucella lima) were found around Vancouver. Neogastropod populations could have been extirpated by severe TBT contamination in Vancouver, as relatively high concentrations of TBT were detected in tissues of Mytilus trossulus from Vancouver, and the neogastropods distributed in Vancouver might be sensitive to TBT. Recovery from imposex, however, was observed in neogastropod populations from three sites at Victoria and Mission Point. TBT contamination has continued around Vancouver, arising from continuous use of TBT in antifouling paints for vessels larger than 25 m in length; however, TBT has decreased around Victoria and Mission Point. Different patterns of TBT accumulation in tissue were observed among the bivalve species from Vancouver. The highest TBT concentration detected in Tresus capax suggested some possible adverse effects. TBT was the most predominant butyltin component in almost all bivalve specimens surveyed, suggesting a low rate of TBT metabolism. Phenyltin compounds were not detected in any molluscan specimens in this study.  相似文献   

Effects of prolonged exposure to 4-tert-octylphenol on toxicity and indices of oestrogenic exposure in the sand goby (Pomatoschistus minutus, Pallas)   总被引：3，自引：0，他引：3  

Robinson CD  Brown E  Craft JA  Davies IM  Moffat CF 《Marine environmental research》2004,58(1):19-38

Alkylphenolic compounds are present in estuarine and marine environments. They are moderately bioaccumulative, and oestrogenic to fish following three week, in vivo, exposures. The effects of prolonged exposure are, as yet, unclear. Sand goby (Pomatoschistus minutus) were exposed to measured concentrations of 4-tert-octylphenol (OP) in a 28-day, dose-ranging study, and a six month temporal response study. Following 28-days exposure to measured 31+/-6 or 101+/-47 microg l(-1) OP (mean+/-SD), immature male sand goby showed elevated vitellogenin (VTG) mRNA expression. Plasma alkali-labile phosphate concentrations were elevated in both sexes and were higher in females than males. Although measured OP concentrations were variable, they were significantly different for each treatment and a range of concentration-dependent effects were observed. The LC(50) for chronic OP exposure (8 weeks) was 29+/-6 microg l(-1), and both sexes demonstrated concentration and duration dependent increases in VTG mRNA expression. Exposure to 28+/-20 microg l(-1) OP (median+/-95% CI) for 6 months inhibited development of male nuptial colouration and sperm duct glands. These findings are discussed in relation to environmental concentrations of alkylphenols and ecological concerns.  相似文献   

航标灯用波力发电装置评议会在穗召开     

候湘琴 《海洋工程》1987,(2)

中国科学院广州能源研究所研制的 BD 型航标灯用波力发电装置在南海经过两年多时间的海上试用,运行可靠、工作情况良好,即使在波浪较小的水域也取得了满意的发电效果。国家科委海洋组办公室于1986年12月9日在广州主持召开了航标灯用波力发电装置评议会,交通部水上安全监督局航测处,天津、上海、广州三个航道局航测处,上海航标厂,南  相似文献   

洋脊的岩浆房有多大？     

Nicol.  A 陶鲁 《海洋地质译丛》1993,(3):75-78

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珠江口岸式波力试验电站     

梁贤光  高祥帆  郑文杰  余志  蒋念东  侯湘琴  游亚戈 《海洋工程》1991,(3)

中国第一座波力试验电站——珠江口岸式波力电站于1990年2月15日试发电成功。该电站位于珠江口大万山岛的南岸,面向浩瀚南海。设计波况H1/10=1.5m,T=6.5s.计划装机容量为8kW,第一台为3kW无刷爪极式发电机组,输出110V直流电,第二台为5kW无刷单相交流同步发电机组,输出220V交流电。目前投入试发电的是3kW机组。本文将介绍该电站气室性能模型试验,空气透平与气室性能匹配设计,岩坎爆破施工,实海条件下电站气室性能试验和发电试验结果。  相似文献   

南沙群岛永暑礁区近百万年来的古气候变化：—南永1井的锰含量分析   总被引：4，自引：0，他引：4  

郭丽芬  陈婉颜 《热带海洋》1993,12(4):39-46

用锰含量的变化，将南永１井岩心划分为２１个锰阶段，与洛川黄土、深海沉积物、柴达木盆地察尔汗盐湖的气候旋回进行对比，在布容、松山极性期界疆线（７３０ｋａ）以上，存在９次气候旋回，锰含量相对高的奇数阶段代表相对湿热的气候环境，而偶数阶段代表相对干冷的气候。Ｍｎ／Ｃａ和Ｃｄ／Ｃａ比值的正异常段反映三期围区的火山活动影响。锰的变化反映全球性的气候事件和本地区的局部地质事件。  相似文献   

盆地地球动力学     

金康辰  陶国保 《海洋地质信息通报》1994,(6):5-7

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