水热成矿流体中的短链羧酸

文中简述了天然水流体中的短链羧酸产出状况。短链羧酸地球化学的研究目前集中于沉积盆地和表生环境。根据C H O体系中某些C H O化合物的化学关系和热力学分析 ,推测深部水热流体中有可能存在短链羧酸。研究高温热液矿床矿物流体包裹体的水溶有机组分可能是检验这一推测的突破口。某些石英脉型热液矿床的矿物流体包裹体压碎浸取和离子色谱分析确定 ,成矿流体中存在少量短链羧酸 ,而且甲酸是优势物种。文章讨论了矿物包裹体浸取实验结果需要进一步探讨的问题 ,认为研究水热成矿流体短链羧酸地球化学具有重要的理论意义。     

广州海印花园深基坑支护工程施工技术

对位于珠江边，周边施工环境恶劣，地质条件差的广州海印花园深基坑支护工程施工技术进行了总结，为今后类似的复杂大型深基坑支护工程施工提供了成功的经验。     

扬子地台西缘江浪变质核杂岩的出露地壳剖面构造地层柱

扬子地台西缘江浪变质核杂岩的出露地壳剖面构造地层柱自下而上由３个体系构成，即中元古界李伍岩群堆垛层系统，代表深部构造层次中多期、多体制变形变质改造后的扬子地台基底；古生代褶叠层系统（中间韧性流变层），其中的３个岩组具有不同的褶叠层构造地层型，其时代分别为奥陶纪、早志留世和二叠纪；最上部为浅部构造层次纵弯曲变形的三叠纪西康群板岩带。在各体系之间以及各体系内部，发育了一系列的顺层韧性剪切滑脱带；其中以分割基底堆垛层与下部盖层流变层的区域性韧性剪切滑脱带最具意义，我们称之为基底剥离滑脱带。     

带约束条件的特征与最小二乘影像匹配

讨论了一种新的边缘检测方法和用链码描述的线知数学模型，给出了基于不变线矩匹配的约束条件，并采用基于特征与最小二乘结合实现了精确的子像素匹配。     

Three-dimensional Motion of Multichain-Buoy Mooring System in shallow Water and Survival Conditions

An engineering numerical model for three-dimensional motion of multichain-buoy mooringsystem in shallow water and survival condition is given in this paper.Shooting-aim method is employedfor solving the dynamic equations of chain system in order to match the computation of buoy motion.Theresponses of buoy and chain have been computed for different wind-wave-current directions and differentrigidity of chain.The results show that the present numerical model is reasonable.     

Tracing technique of stable 15N isotope: an application in study of mariculture

Ｔｒａｃｉｎｇｔｅｃｈｎｉｑｕｅｏｆｓｔａｂｌｅ~（１５）Ｎｉｓｏｔｏｐｅ：ａｎａｐｐｌｉｃａｔｉｏｎｉｎｓｔｕｄｙｏｆｍａｒｉｃｕｌｔｕｒｅ￥ＨｏｎｇＡｓｈｉ；ＬｉＷｅｎｑｕａｎａｎｄＷａｎｇＭｉｎｇｌｉａｎｇ（Ｔｈｅｐｒｏｊｅｃｔｉｓｓｕｐｐｏｒ?..     

海洋岛西侧扇贝养殖区夏季水温连续变化特征的分析

利用最新研制测温链浮标，根据１９９４年６－８月在辽宁省长海县海鲜岛扇贝养殖区现场连续观测的水温实测数据，分析该区域水温连续变化特征。分析结果表明：在０－１０ｍ范围内，水温存在着极为频繁的急剧变化，而且水温的连续与潮位的变化基本相同。通过时间序列频谱分析可以看出水温波动存在着明显的潮周期特征，并且水温剧烈波动的时间与扇贝出现大量死亡的时间相吻合。     

Seasonal Variations of Plankton Food Web Structure in the Coastal Water off Usujiri Southwestern Hokkaido,Japan

The planktonic food web structure in the subarctic coastal water off Usujiri south-western Hokkaido, Japan was investigated from June 1997 to June 1999, based on seasonal biomass data of pico- (<2 µm), nano- (2–10 µm), micro- (10–200 µm) and mesoplankton (>200 µm), and path analysis using the structural equation model (SEM). In spring, microphytoplankton predominated due to diatom bloom, while pico- and nanophytoplankton predominated in the other seasons, except November and December 1997. The seasonal change in size distribution of heterotrophic plankton was almost similar to that of phytoplankton, and mesozooplankton biomass was high in spring. The path analyses suggest that the main channel in the microbial food web could vary according to phytoplankton size composition, indicating not only the classical food chain (microphytoplankton - copepods) but also the indirect route (microphytoplankton - naked dinoflagellates - copepods).     

Adaptive Strategies at the Ecosystem Level: Examples from Two Benthic Marine Systems

Abstract. Adaptive strategies on the ecosystem level are demonstrated using the properties of systems (community biomass, trophic level energy transfer). Development of stabilizing storages versus rapid turnover and energy transfer through the grazing food chain versus detritus food chain are shown to be adaptive processes leading towards an optimal performance of the system. A model of incorporation and processing of information in ecosystems is proposed which contains the essential features of evolution. The persistence of "interspecific altruism" is discussed.