Caught in the act: the 20 December 2001 gravity flow event in Monterey Canyon

A sediment gravity flow descended through the axis of Monterey Canyon on 20 December 2001 at 13:35 Pacific standard time. The timing of this event is documented by a current-meter package which recorded an 11.9-dbar pressure increase in less than 10 min and was found 550 m down-canyon from its deployment site, buried completely within a >70-cm-thick gravity flow deposit. This event is believed to have started in less than 290 m of water because an instrument at this location was also lost at the same time. A 178-cm core collected after the event from the axis of the canyon at 1,297-m water depth contained fresh, greenish, chlorophyll-rich organic material at 32-cm sub-bottom depth, suggesting the event extended to this water depth. The only trigger identified for this mass movement event appears to be moderate sea and surf conditions. Thus, gravity flow events of this magnitude do not require an exceptional triggering event.     

北黄海长山群岛海域沉积环境初步研究

本文在获取１９８９－１９９３年黄海北部长山群岛海域沉积物大量数据基础上，借助沉积物粒度分析（Ｑ型），揭示出该海域具有在“岛屿效应”影响下的４种环境能量类型，分析了与其适应的环岛沉积环境及其分布特征。     

Treatment of Hydrodynamic Loading for Random Sea State

- In order to employ cost effective frequency domain analysis for off-shore structures treatment of hydrodynamic loading is essential. Drag and inertia dominated, resonating and antiresonating cases under random sea states are analyzed to highlight the implications and relative merits of four salient linearization techniques.     

二色桌片参的化学成分研究：Ⅲ、二色桌片参多糖—1——岩藻聚糖的免疫调节

研究了二色桌片参多糖－1（PMI－1）在体内、体外的免疫调节作用。结果表明。二色桌片参多糖－1体外能促进小鼠脾淋巴细胞增殖，促进小鼠脾淋巴细胞分泌IL－2；体内能显著促进迟发型敏反应，增加脾指数，胸腺指数：具有显著的免疫增强作用。     

南海西沙西南海域表层沉积物特征

西沙西南海域表层沉积物样品矿物成分，地球化学，微体古生物分析测试结果表明：沉积物可分为７种类型，沉积环境主要是陆坡，部分为深海平原，海洋生物，海洋化学以及火山物质的沉积起到了积极的作用，陆源物质的影响较小，它们主要来源于北部大陆和南部岛礁等物源区。     

能量分析在台风短期预报业务中的应用

本文以９４１４、９４１５号两个连续北上台风为例，证明能量场的分布与台风移向有着明显的对应关系。     

Freshening of the Intermediate Waters in the Northern South China Sea over the PastSix Decades

The properties of salinity in the South China Sea (SCS), a significant marginal sea connecting the Pacific andIndian Oceans, are greatly influenced by the transport of fresh water flux between the two oceans. However, the long-termchanges in the intermediate water in the SCS have not been thoroughly studied due to limited data, particularly in relationto its thermodynamic variations. This study utilized reanalysis data products to identify a 60-year trend of freshening in theintermediate waters of the northern South China Sea (NSCS), accompanied by an expansion of low-salinity water. Thestudy also constructed salinity budget terms, including advection and entrainment processes, and conducted an analysis ofthe salinity budget to understand the impacts of external and internal dynamic processes on the freshening trend of theintermediate water in the NSCS. The analysis revealed that the freshening in the northwest Pacific Ocean and theintensification of intrusion through the Luzon Strait at intermediate levels are the primary drivers of the salinity changes inthe NSCS. Additionally, a weakened trend in the intensity of vertical entrainment also contributes to the freshening in theNSCS. This study offers new insights into the understanding of regional deep sea changes in response to variations in boththermodynamics and oceanic dynamic processes.     

山西能源重化工基地建设研究

山西能源重化工基地建设关系到全国四个现代化的实现,被列为国家重点建设工程,制定了《山西能源重化工基地综合规划》。本文分析了80年代山西省经济建设的成就与问题。提出了“整体创新,综合开发”,把山西能源重化工基地建设成内陆经济开放区的战略大思路,为此,90年代应完成11项大型经济战略工程,同时展望了经济发展改革前景。     

频率域电磁法中视电阻率全区定义

视电阻率定义在电法勘探中得到广泛的应用。目前在频率域电磁法中常常采用远区视电阻率定义。由于在频率域中收发距并非足够大,以致在低频段远区定义视电阻率往往不能反映地下电阻率值。我们定义全区电阻率及引入校正系数K,经二层三层模型及野外实测资料的计算,证明了方法的有效性。     

泥浆性能对定向钻进铺管孔壁稳定性的影响

本文通过对泥浆性能的分析,特别是对泥浆流变参数的控制与调节在定向钻进非开挖铺管中的作用及其护壁原理的分析,简要阐述了泥浆性能对定向钻进铺管孔壁稳定性的影响,对非开挖定向钻进铺管施工有一定的指导意义。