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With the data of the landsatellite MSS with computer image process, the information and visual interpretation of reef shallow beach, bottom sediment and tidal current near the Chang-dao Island are obtained. The paper also discussed the physics basis, feasibility and the module of the processing technology. The oceanological data obtained by space sensor are comprehensive, which include the elements of atmosphere column, sediment on sea surface or in the water and the bottom material, etc. Each of the elements... With the data of the landsatellite MSS with computer image process, the information and visual interpretation of reef shallow beach, bottom sediment and tidal current near the Chang-dao Island are obtained. The paper also discussed the physics basis, feasibility and the module of the processing technology. The oceanological data obtained by space sensor are comprehensive, which include the elements of atmosphere column, sediment on sea surface or in the water and the bottom material, etc. Each of the elements severally affects the picking up of depth information. If the computation of mathmatic equation was used to determine the depth data, many sea truth parameters and boundary condition must be provided, which are quite difficult to obtain with satellite. So, the paper discussed the method of achieving the simple module and data filter with the use of charts and the boundary condition determined by few sea truth measurement data. The test of area's underwater situation is complicated and fast-variable because the satellite sensor's spectral brightness difference is very small and the image information is quite comprehensive. To obtain the better result, the multiseasonal-multispectral MSS data are needed to comprehensively pick up the information and process the data with visual interpretation and computer assist. It can be seen that the application of satellite remote sensing and image processing technology is one of the methods of shallow sea investigation, and it's a useful supplement for ordinary investigation, especially for the investigation in the changeable and dangerous oceanic areas. 利用陆地卫星MSS数据,通过计算机图象处理,提取了渤海海峡南部海域长岛附近海区的礁石、浅滩、底质、海流等的信息以及它们在图象上的目视判读标志。提出应用卫星遥感技术和图象处理是浅海调查的一种方法,是常规调查的一个重要补充,可作为我国浅海,特别是易变及危险海区动态观测的一个重要手段。 By using the data of the landsat and with the help of computer image processing method, the information of shallow sea's configuration and terrain are obtained in the areas of Chang Dao Island (Southern Bohai Strait), Ming Jian, Ou Jian and Pearl river mouth. In this paper, the auther discusses the characteristics of under-water terrain and the module of picking up water depth message. To obtain the better result, the multiseaonal and multispectral data are needed to pick up the information. It can be seen that... By using the data of the landsat and with the help of computer image processing method, the information of shallow sea's configuration and terrain are obtained in the areas of Chang Dao Island (Southern Bohai Strait), Ming Jian, Ou Jian and Pearl river mouth. In this paper, the auther discusses the characteristics of under-water terrain and the module of picking up water depth message. To obtain the better result, the multiseaonal and multispectral data are needed to pick up the information. It can be seen that the application of satellite remote sensing and image processing technology is one of the method of shallow sea investigation, and it's a useful supplement for ordinary investigation, especially for the investigation in the changeable and dangerous oceanic areas. Also, its applications in sea shore planning, developing and managing such as environmental monitoring and evaluating for acquatic culture in bay. 本文根据笔者在我国渤海海峡、闽江口、瓯江口以及珠江口附近海域的遥感实验,讨论由卫星遥感提供的水下地形地貌信息的特征、机理,提出使用信息论和灰色系统论方法分析水深遥感信息传递的过程。以此为依据,建立水深信息提取模型,研究其实用性、精度和效果。实践表明,水深遥感的测量精度没有达到大、中比例尺常规测量的要求。但作为大面积、短周期的宏观分析,特别是遥感图像上显示的海水表层流场特征,对判别浅海水下地形走向和地貌单元,了解其冲刷、沉积作用的动力因素,动态变化等具有十分重要的意义,它成为常规方法的补充手段。对近海的规划、开发,如港湾海水养殖、航道选址、海上工程、海水排污等方面的海水环境分析与宏观评价及监测,具有一定的优势。本文着重讨论了以下三个问题: 1.水下地形地貌遥感的原理与信息特性;2.水深信息提取及灰色系统方法与模糊判别模型分析;3.遥感水下地形地貌的应用与效果分析。 Liquid scintillation counting technique for small samples with carbon content of 100-200 mg is very useful supplement to fill the gap between conventional dating methods which require samples containing 2-6 g carbon and accelerator mass spectrometric techniques which treat samples as small as 1 mg carbon. This technique can be effectively applied to geology and archaeology, especially where extensive chemical pretreatment of samples is necessary. This study covers the establishment of the small sample... Liquid scintillation counting technique for small samples with carbon content of 100-200 mg is very useful supplement to fill the gap between conventional dating methods which require samples containing 2-6 g carbon and accelerator mass spectrometric techniques which treat samples as small as 1 mg carbon. This technique can be effectively applied to geology and archaeology, especially where extensive chemical pretreatment of samples is necessary. This study covers the establishment of the small sample dating technique and its comparison with the others. The results indicate that their  ̄(14)C ages are not significantly different from each other within the experimental error. The theoretical maximal age obtainable using the small sample technique may be as high as 43 270 year, and the efficiency of detection is 88%. 碳量100-200mg小样品~(14)C液体闪烁计数测年法是常规测年法(2000-6000mgC)与加速器测年法(ImgC)之间的必要补充。这一技术可有效地运用于地质学与考古学。对~(14)C样品进行分组提取的前处理时,采用该方法测年就尤为必要。本项研究包括了小样品液闪测年方法的建立以及使用该方法对15对样品的测量和比较。技术测定的每个试样的~14C年龄在试验误差范围内没有显著性差异,使用小样品测年技术可测最大年龄的理论计算值为43270a,探测效率为88%。
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