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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Seafloor sediment classification based on echo characteristics obtained from single-beam echosounder is very useful in remote and instant sediment classification.
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Seafloor sediment classification from single beam echo sounder data using LVQ network
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The spatial location allows the image intensity to be corrected for depth and insonification angle, thus improving the use of the sonar for identifying changes in seafloor sediment.
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These findings help to predict seafloor sediment types by analyzing echo strength.
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We describe in detail a number of examples of seafloor phase reversals and use a simple one-dimensional geophysical model to test the hypothesis that they are the result of the presence of gas within the seafloor sediment.
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| | Three cores in three typical areas of the East China Sea, including St 111 from the cold eddy mud area in the middle continental shelf, St. 410 from the middle continental shelf sand area, and St. 403 from the Zhejiang coastal mud area,were taken using a vibrocorer during the Chinese JGOFS Cmses supported by the Natural Science Foundahon of China in 1993 and 1994 respechvely. The contents of particulate organic carbon (POC), particulate inorganic carbon (PIC),particulate organc nityogen (PON) and gran size ... | | 在1993和1994年两个航次中,利用震动式取样器从东海陆架取得3个柱状岩芯样品。对其进行了POC,PIC,PON含量和粒度分析,并同其上覆水体的POC,PIC以及总颗粒物的垂直通量和悬浮体作了比较。结果表明,东海海底表层沉积物中的总碳含量中陆架冷涡泥质区最高,浙江近岸泥质区次之,中陆架砂质区最低。PIC含量均大于POC。中陆架砂质区海底沉积物缺乏碳的保存条件,在生物大量繁殖期(更半季)许多颗粒碳可从水体转入海底沉积物,在非生物繁殖期的冬半季;可能主要表现为去碳作用,年尺度上海底沉积物-海水间面碳的收支处于动态平衡,固碳作用有限。中陆架冷涡泥质区和浙江近岸泥质区海底沉积物具有良好的碳保存条件,是东海海底固定碳的“汇”。近岸泥质区固定的碳量远高于中陆架冷涡泥质区。水体中生物作用生成颗粒碳的“汇”并非都与海底沉积物固定碳的“汇”相吻合。 | | 文摘来源 | | In the stress-strain course of being controlled, the sound velocity of each type seafloor sediment is variance as the developing of the strain course. The experimontal analysing show three conclusions at last: (1) The maximum sound velocity come out at stress peak value, (2) The maximum sound velocity come out at the phase of not loading,(3) The maximum sound velocity come out at the end of strain course. These results relate to the physical mechanic features and structural characteristics of ##... | | 各类海底沉积物在受控应力─应变过程中,声速随应变过程发展而变化;分析表明,最终有3种结果:(1)声速最大值是在应力最大时出现。(2)声速最大值是在未加载时出现。(3)声速最大值是在应变过程结束时出现。这些结果与沉积物的物理力学性质和结构特征等有关。 | | 文摘来源 | | Some new progress in detecting the geological formations and sediment properties by acoustic signal are presented in this paper.The linear or non linear modulate frequency sonar and its applications in detecting the geological formations and classifying seafloor sediment properties are introduced.The new patents and three kinds of non linear sonar used in classifying seabed sediment by its acoustic parameters are also show in the article. | | 文章介绍了海底声学探测与底质识别技术的现状及最新进展。重点介绍线性调频声呐 (CHIRP)技术和非线性调频声呐技术 (参量阵声呐 )在海底沉积层结构、海底地形地貌探测及其在海底沉积物的底质属性分类识别方面的应用。并简要介绍国内外在线性和非线性调频声呐技术及用于沉积物属性识别方面的最新专利技术或最新进展。 | | 文摘来源 | |   | | << 更多相关文摘 |
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