The Kuroshio east of Taiwan and the currents east of the Ryūkūy-guntō during October of 1995

ＴｈｅＫｕｒｏｓｈｉｏｅａｓｔｏｆＴａｉｗａｎａｎｄｔｈｅｃｕｒｒｅｎｔｓｅａｓｔｏｆｔｈｅＲｙｋｙ－ｇｕｎｔｄｕｒｉｎｇＯｃｔｏｂｅｒｏｆ１９９５ＹｕａｎＹａｏｃｈｕ,ＬｉｕＹｏｎｇｇａｎｇ,Ｃｈｏ－ｔｅｎｇＬｉｕ,ＳｕＪｉｌａｎ（Ｒｅｃｅｉｖｅｄ...     

关于递推关系的k项边值问题

首先,当三次递推关系有2个相等的特征根时,讨论三项边值问题的求解方法;然后,根据k次递推关系的特征根的不同情况,运用克兰姆法则和发生函数方法,给出求解k项边值问题的方法;最后,通过实例演示了本文介绍的方法。     

关于整函数及其k阶导数的唯一性

在亏量和等于1的条件下,证明了整函数及其k阶导数具有2个IM公共小函数的整函数的1个唯一性定理,部分回答了李平和杨重骏于2002年提出的1个问题,并改进了先前已有的结果.     

Extending the k–ω turbulence model towards oceanic applications

Four different two-equation turbulence models for geophysical flows are compared: The k–ϵ model, two new versions of the k–ω model, and the Mellor–Yamada model. An extension of the k–ω model for buoyancy affected and rotating flows is suggested. Model performance is evaluated for a few typical oceanic flows. First, new analytical solutions of the models for the surface layer affected by breaking surface waves are discussed. The deficiencies of earlier attempts are high-lighted, and it is demonstrated why the Mellor–Yamada model and the k–ϵ model fail. It is illustrated that only one version of the k–ω model computes correct decay rates for turbulent quantities under breaking waves. Second, it is demonstrated that all models predict almost identical mixed layer depths and profiles for the turbulent kinetic energy in a classical stratified shear-entrainment experiment if the buoyancy term in the second equation is appropriately weighted. Third, the accuracy and numerical robustness of the new k–ω model in realistic oceanic situations is confirmed by comparison with the data-set of the Ocean Weather Ship ‘Papa’.     

面向时空非均匀Argo数据集的k邻域搜索算法

k邻域搜索作为海洋温盐场重构关键的前序步骤,搜索速度和结果是否具有代表性直接影响研究工作的效率和科学性。当前的k邻域搜索算法及其改进方法主要针对空间数据集。面向Argo时空非均匀数据集提出了一种k邻域快速搜索算法,首先基于立方体栅算法向时空维扩展,利用时空子分块对海量、时空非均匀的采样点进行分配;在此基础上采用时空补偿的策略对算法进行优化。结果表明,该方法有效提升了Argo浮标的邻域搜索效率并且改善了搜索结果的分布情况。     

Evidence for active faults in Küçükçekmece Lagoon (Marmara Sea,Turkey), inferred from high-resolution seismic data

A total of 42 km of high-resolution seismic reflection and bathymetric data were collected for the first time to document stratigraphic and structural features of the uppermost 5 m of the Holocene sedimentary infill of Küçükçekmece Lagoon along the Marmara Sea coast of Turkey. The lagoon gradually deepens from 1 m off the northern coast to a maximum of 20 m in the southern basin. Stratigraphically, the uppermost seismic unit is characterized by a generally parallel reflection configuration, indicating deposition under low-energy conditions. In the southern basin of the lagoon, the sub-bottom is locally characterized by frequency attenuated and chaotic reflections interpreted as gas-charged sediments. Structurally, the soft sediment of the first 5 m below the lagoon floor is locally deformed by active strike-slip fault zones, here named FZ1, FZ2, and FZ3. These fault zones are NW–SE oriented and follow the long axis of the lagoon, compatible with the geographic alignment of the lagoon, the onland drainage pattern, and the scarps of the surrounding terrain. Moreover, the fault zones in Küçükçekmece Lagoon are well correlated with active offshore faults mapped during previous studies. This suggests that the FZ1, FZ2, and FZ3 fault zones are not merely local fault systems deforming the Küçükçekmece Lagoon bottom, but that they may be part of a regional fault zone extending both north and southward to merge with the northern branch of the North Anatolian Fault Zone (NAFZ) in the Ç?narc?k Basin. This, however, needs to be confirmed by further structural and seismological studies around Küçükçekmece Lagoon in order to more firmly establish its link with the NAFZ in the Marmara Sea, and to highlight potential seismic risks for the densely populated Istanbul metropolitan area.     

Comparing traditional and modern methods of kākahi translocation: implications for ecological restoration

ABSTRACT

Handling methods are an important determinant of translocation success. In Aotearoa/New Zealand, tangata whenua traditionally used insulated kete to translocate aquatic animals to new environments as part of ahumoana tawhito (ancient aquaculture). In this study we investigated the influence of three transport methods (traditional [flax kete], modern [bucket], and a hybrid of the two [bucket with flax support structures]) on the short-term performance (burrowing speed) of kākahi (freshwater mussels). We also tested whether assisted release (planting kākahi in the substrate) resulted in enhanced burrowing speeds. Kākahi that were transported using the traditional method were slower to begin probing the substrate, but there was no difference in overall burrowing speed. We also found that assisted release resulted in faster burrowing speeds. We conclude that handling and release procedures can influence the short-term performance of translocated kākahi, and we recommend procedures for future translocation projects, including transporting animals in immersion vessels where practical, and planting them at the release site     

冰情,灾害,监测,预报,减灾

本文概述渤海和黄海北部海域冰情及其产生的灾害,概述海冰监测和预报。讨论防灾减灾有关问题。     

具有2个公共小函数的整函数及其k阶导数的唯一性

利用加权分担的思想,证明整函数及其k阶导数具有2个公共小函数的1个唯一性定理,改进Frank G, 郑稼华,王书培和杨连中等人的有关结果.     

中国鱼类目,科,属,种总数

中国鱼类共４纲５１目３２０科，１３１８属，４０６０种，其中移入种３７种；土著种４０２３种，分 于４９目，３１２科，１３０１属。     

FLOCCULATION OF DISSOLVED Fe, Al, Mn, Si, Cu, Pb AND Zn DURING ESTUARINE MIXING

This is the first study of the flocculation of dissolved Fe, Al, Mn, Si, Cu, Pb and Zn during mixing in Zhujiang Estuary, based on the experiment on a series of solutions of salinities ranging from 0 to 24 by mixing the Zhujiang water near Zhongshan University and the seawater in Wan-shan Archipelago area. The mechanism of flocculation of the 7 elements is explored, and the effects of time, acidity and temperature on flocculation are discussed. The results show that the flocculation rates of Fe and Pb in the Zhujiang water are almost a hundred per cent, while that forCu reaches 76%; for Mn, 51%; for Al, 48%; for Zn, 28%; and for Si, 1.2%, indicating that Si is conservative.     

春节,吃为先行有车,食有鱼,连年有余,十全十美

鱼,因为营养丰富、肉质鲜美,一直是上至王公贵族下至平头百姓公认的美味佳肴,在中国传统文化中更是富庶、繁荣的象征,有关鱼(菜)的图纹、成语典故数不胜数,如"鱼能熊掌不可兼得"以示珍贵;"行有车,食有鱼",青明身份和特权.     

半夏泻心汤对PLGC大鼠胃黏膜P13k/Akt/mTOR通路的影响及其防治研究

目的：通过检测大鼠胃癌前病变（Precancerous Lesion of Gastric Cancer,PLGC）胃黏膜微环境P13k/Akt/mTOR通路的相关指标,揭示半夏泻心汤对PLGC大鼠胃黏膜微环境的影响及防治作用机制。方法：将50只清洁级雄性SD大鼠采用改良MNNG+复合法造模,分别于造模第10周末和第20周末各随机抽取5只检测造模是否成功。将剩余40只模型大鼠随机分为4组：中药组（予半夏泻心汤灌胃）、西药组（予叶酸片液灌胃）、中西药结合组（予半夏泻心汤+叶酸片液灌胃）和模型对照组（继续造模处理）,每组10只,于药物干预的第6周和第12周末停药2d后各组随机抽取5只实验大鼠观察药物干预对PLGC大鼠胃黏膜微环境的影响。结果：药物干预第6周末不成模,故无结果。干预第12周末,与模型对照组比较,中药组大鼠胃黏膜P13k和P53表达高,Akt、mTOR、HIF-1α和Bcl-2表达低,差异均有统计学意义（P<0.05）。结论：半夏泻心汤可使PLGC大鼠胃黏膜微环境P13k的表达升高,Akt、mTOR的表达降低,从而使HIF-1α的表达水平降低,由此提高P53水平,降低Bcl-2的表达,达到治疗甚至逆转PLGC的目的。     

长江口表层沉积物中Fe,Mn,Zn,Co,Ni的地球化学特征

用1981年中美长江口联合研究采集的样品,测定了长江口表层沉积物及其酸可溶部分Fe,Mn,Zn,Co和Ni的含量,报道了它们的分布,分析了它们与Fe-Mn氧化物、有机质和环境参数之间的相互关系,建立了相应的复相关式。     

水文资料自动采集,整编,传输,实时预报系统

系统应用电子技术、计算机技术、无线电通讯技术于水文测报;是水文数据采集、模块现场存储与无线电遥测相结合的,集水文资料采集、电讯整编和水文自动测报于一体的综合性系统。     

南海表层水中的溶解态Cu,Pb, Zn,Cd

于1998年“南海海洋环境调查”外业工作期间在南海的各个站位,按照严格的防沾污措施采集了106个表层海水样品.采用溶剂萃取-石墨炉原子吸收法对样品中的痕量重金属Cu,Pb,Zn,Cd含量进行了分析测试.测得各重金属的平均值如下:Cu 0.100 μg/dm3,Pb 0.060μg/dm3,Zn 0.086 μg/dm3,Cd 0.007μg/dm3,接近世界大洋水的浓度水平.各重金属的空间分布呈现出海区周边含量高于中央,浓度有自近岸向远海逐渐减小的趋势.相关分析的结果表明各重金属夏季相关性优于冬季,Cu与Cd存在良好的正相关关系,并且首次在南海表层水发现Cu,Cd与营养盐的相关关系.将重金属浓度值作数理统计分析,得到它们在南海的基线值.