Sloshing in a three-dimensional rectangular tank: Numerical simulation and experimental validation

Pressure variations and three-dimensional effects on liquid sloshing loads in a moving partially filled rectangular tank have been carried out numerically and experimentally. A numerical algorithm based on the volume of fluid (VOF) technique is used to study the non-linear behavior and damping characteristics of liquid sloshing. A moving coordinate system is used to include the non-linearity and avoid the complex boundary conditions of moving walls. The numerical model solves the complete Navier–Stokes equations in primitive variables by using of the finite difference approximations. In order to mitigate a series of discrete impacts, the signal computed is averaged over several time steps. In order to assess the accuracy of the method used, computations are compared with the experimental results. Several configurations of both baffled and unbaffled tanks are studied. Comparisons show good agreement for both impact and non- impact type slosh loads in the cases investigated.     

闽粤沿海地震形势的初步分析

本文从地震学和地震地质学角度出发，讨论海峡７．３级地震对东南沿海地震带活动性的影响。着重分析了海峡７．３级震前的背景空区及其震后演变过程，并采用各种方法对闽粤沿海地区进行了时空扫描分析，提取异常指标。预测该地区未来地震活动的趋势，对缩小未来可能发生破坏性地震的时间、地点、强度范围具有一定的意义。     

中国对虾血淋巴蛋白质、葡萄糖含量的研究

于１９９２－１９９３年５月和１０月，在胶州湾捕捞中国对虾亲虾，９月在莱州和胶南采集的人工养殖中国对虾，采用双缩脲法测定其血淋巴中的血清总蛋白含量，用０－ＴＢ法测定血清葡萄糖含量，并研究注射灭菌海水、海洋弧菌后，对中国对虾血清总蛋白含量和血清葡萄糖含量的影响规律。     

论东海陆架盆地玉泉运动

据地质及地球物理勘探资料，并结合周围邻近盆地的对比研究后提出：（１）目前确定的新玉泉运动，其影响比前人描述的轻微得多；（２）以前所确定的原（老）玉泉运动的活动强度比新玉泉运动强烈得多，不应将原（老）玉泉运动取消，而应将新、老玉泉运动的间隔期视为构造变革过渡期。     

Gravity anomalies and deep structure of the Ninetyeast Ridge north of the equator,eastern Indian Ocean — a hot spot trace model

The Ninetyeast Ridge north of the equator in the eastern Indian Ocean is actively deforming as evidenced by seismicity and its eastward subduction below the Andaman Trench. Basement of the ridge is elevated nearly 2 km with respect to the Bengal Fan; seismic surveys demonstrate continuity of the ridge beneath sediment for 700 km north of 10° N where the ridge plunges below the Fan sediment. The ridge is characterised by a free-air gravity high of 50 mgal amplitude and 350 km wavelength, and along-strike continuity of 1500 km in a north-south direction, closely fringing (locally, even abutting) the Andaman arc-trench bipolar gravity field. Regression analysis between gravity and bathymetry indicates that the ridge gravity field cannot be explained solely by its elevation. The ridge gravity field becomes gradually subdued northwards where overlying Bengal Fan sediments have a smaller density contrast with the ridge material. Our gravity interpretation, partly constrained by seismic data, infers that the ridge overlies significant crustal mass anomalies consistent with the hot spot model for the ridge. The anomalous mass is less dense by about 0.27 g cm^–3 than the surrounding oceanic upper mantle, and acts as a cushion for isostatic compensation of the ridge at the base of the crust. This cushion is up to 8 km thick and 400–600 km wide. Additional complexities are created by partial subduction of the ridge below the Andaman Trench that locally modifies the arc-trench gravity field.     

山东蓬莱沿海的贝类

本文报导了蓬莱沿海的贝类１１１种,隶属４９科８６属 ,并对它们的生态类型,区和纱分布特点作了初步分析。     

赤潮异弯藻对中国对虾感染白斑综合症病毒的影响

白斑综合症病毒(white spot syndrome virus,WSSV)是近年来危害我国乃至世界对虾养殖业的主要流行病原[1-4].WSSV病毒暴发流行范围广、致病性强,自出现以来给对虾养殖业造成了巨大的损失.对虾病毒病的发生是对虾自身的健康状况、病原生物,以及环境条件等各种因素综合作用的结果,外界环境因子或者内环境的变化会引起对虾机体抵抗力下降,从而易受病原生物的感染而发病;同时病原生物的侵入又使机体免疫能力下降而更易受环境因子的胁迫导致疾病突发,因此研究环境因子对病原生物以及对虾抗病力的影响是确保养殖业健康发展的重要环节.     

南极航线和航区环境概述

本文汇集了我国南极科学考察前十年（１９８４－１９９３年）的南极考察航线，根据航区和任务，对南极航线进行了分类：对各航区中影响航行的海洋环境状况－诸如低纬地区的热带气旋，中纬地区的温带气旋和高纬地区的绕极气旋等主要灾害性天气系统的生成源地，移动路么荼了介绍；文中还着得活冰的增，减期和浮冰边缘线进行了描述。以求达到对过去十年南极考察航线作出比较客观的评价。     

浅水破碎波对直立圆柱作用力的试验研究

分析了桩柱破波力的构成特性,认为破碎波与桩柱作用过程中在不完全绕流区将出现由于附连质量迅速变化引起的冲击力和柱前后波面高度差引起的附加压差力;影响破碎波对直立圆柱作用力的因素应该包括确定破波特性的水底坡度i、入射深水波陡H_0/L_0及代表圆柱对破波作用影响的相对柱径D/H_0。通过从i=1/100到1/15五种底坡上桩柱破波力的系统试验,探索了桩柱破波力的作用特性,归纳了计算桩柱破波力的经验公式。     

皱纹盘鲍贝壳沉积过程的研究

利用“平珠”生成法,通过对插入皱纹盘鲍(Haliotis discus hannaiIno)外套膜外腔中的玻片上沉积物质的分析,探讨皱纹盘鲍贝壳沉积的过程。利用扫描电镜(SEM)观察玻片上沉积物质的超微结构,傅立叶红外光谱(FTIR)分析玻片上沉积晶体的晶相,透射电镜(TEM)观察与玻片接触部分的外套膜的超微结构。结果发现:在将玻片插入外套膜外腔后的4~88h内,有机质首先在玻片上规则沉积。插入玻片88h后方解石晶体开始沉积,104h后出现圆形方解石晶体单位。8d后在方解石晶体表面出现文石晶体突起,15d后出现明显的堆垛型文石片层。27d后突然转变为方解石晶体的沉积。由此可见皱纹盘鲍贝壳的沉积具有一定的周期性,即方解石→文石→方解石的转变为1个周期。透射电镜观察外套膜结构表明在不同的插片时间,外套膜的超微结构不一样。插入玻片24h后,高柱状细胞中的内质网上的核糖体消失,高尔基体数量减少。3d后,大颗粒细胞增多,细胞内充满分泌颗粒。7d后,外套膜上皮细胞新分泌的有机质染色较浅。本研究证明了“平珠”生成法能够模拟贝壳的自然沉积,外套膜细胞超微结构的变化与贝壳沉积过程所处不同阶段有关。