表层物

Without anthropogenic radioactivity, the initial 129I abundance of surface reservoir of earth is confirmed as 1.5×10^(-12) that can be used as starting value for calculation of cosmogenic 129I dating.

核试验和核事故释放的129I测定的是现代沉积物年代，测年时间尺度为50a。人们提出人类利用原子能之前地球表层初始129I丰度为1.5×10^(-12)，并以该值作为利用宇生129I估算年代的初始丰度值。

P richment of surface sediment is possibly related to early diagenetic processes of P in the sediments.

表层沉积物磷的富集与磷的早期成岩行为存在密切关系。

10Be records in the Okinawa Trough sediment during the last glacial, the Younger Dryas cold period, and the Holocene show that the main part of the fluctuations in 10Be content in the sediment can be attributed to variations in the 1°Be production rate.

表层沉积物中的10Be，9Be和Pb三者表现出完全不同的分布特征。10Be的分布主要受黑潮及其支流黄海暖流所支配；10Be的分布受黄河陆源物质输入的影响，主要集中在南黄海泥质区；Pb则主要分布在长江口和琉球群岛附近，反映了人类活动的影响。

B A fuzzy clustering method is developed based on the ISODATA and is applied to the classification and fractionization of suspended and bed loads, respectively. The size clusters of real physical meanings have been identified from the calculation results based on the Wentworth Classification.

在模糊迭代自动聚类方法基础上，发展了一种理论演绎更加严密、物理概念更加明确的模糊聚类方法，并应用于河口表层沉积物和悬移质的分类和分级。

The Cruise of Chinese Second Arctic Science Expedition were conducted from July to September 2003, The concentrations of total hydrolyzable amino acids, hexosamines in the Chukchi Sea and Canada Basin surface sediment samples were measured.

对2003年中国第二次北极科学考察所获得的部分表层沉积物样品进行了总水解氨基酸、氨基糖的测定。

The hard, smooth keratinous ''.

角质物覆盖于牛或其他相关动物的角上的，坚硬而又光滑的表层''。

According the demand of the national"908"special project, the distribution of the detrital minerals and the characteristics of genetic mineralogy of the surficial sea-floor sediments offshore Hainan islands(CJ19 subzone) were studied by means of lens stereoscope, micropolariscope, SEM, EMPA and LA-ICPMS.

依托国家&908&专项项目，借助立体及偏光光学显微镜、扫描电镜、电子探针微分析和激光剥蚀等离子质谱等先进技术手段和方法，对环海南岛海域(CJ19区块)海底表层沉积物中碎屑矿物的分布和锆石、石榴石的成因矿物学进行了研究。

They both tend to consider issues on esthetics in conformity between self and nature and in contradiction between ego and nonego, and put the understanding of "natural Tao"as "culture in nature"into the literary form as "culture in human", so as to regard nature as a supreme esthetical idea.

通过形态学研究视野和主题学研究视野对道家自然美学文艺形态进行观照，我们认为，道家对人文的诠释虽在表层上不尽相同，然其终极的入思方式和深层的心理蕴涵都是一致的，都是在本心与自然同化、本性与外物对立的思维模式中思考美学问题的，都把对作为&天文&的&自然之道&的理解渗入到对作为&人文&的文艺形态之中，从而将本真未凿视为一种至高无上的审美理想。

The results indicated biogenic conversion, petrogenic and pyrogenic were three important sources of PAHs and their contributions were 19%, 24% and 57%, respectively.

由于长江口距离燃烧源较远，与周边的城镇相距甚远，所以长江口表层沉积物中高环多环芳烃含量相对较低，以石油源PAHs污染为主。

PAHs source analysis suggested that, in the Yangtze Estuary, PAHs at locations far away from cities were mainly from petrogenic sources.

上海市主要水体(长江口、黄浦江和苏州河口)表层沉积物中总PAHs浓度为107～7，177ng/g-dw。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。