海坛岛海岸风沙特征及其发育   总被引：7，自引：0，他引：7  

陈方 《海洋科学》1994,18(6):46-50

论述了海坛岛海岸风沙堆积物的沉积特征，对风沙地貌的基本类型进行了划分，分析其发育的基本条件和触发因素，研究其发育历史。  相似文献   

Test Study on Current Force on Mooring Ships     

Zhang Furan  Zhao Jun Zhang Xueqin Assistant Researcher  Tianjin Research Institute of Water Transport Engineering  Tianjin Assistant Engineer  Tianjin Research Institute of Water Transport Engineering  Tianjin 《中国海洋工程》1993,(2)

In respect of an offshore berthing pillar, the test study result of current force acting on mooring ships is described in this paper. Empirical and semi-empirical relationships of current force coefficient are given according to the angle between the flow direction and the ship's longitudinal axis, which are coincident with the result of theoretical analysis.  相似文献   

台湾海峡上升流区底栖生物数量动态的初步研究     

崔玉珩  孙道元  张倩  庄启谦  陈必达  方少华 《海洋科学集刊》1993,(34):115-122

不同季节底梄生物数量的动态由其组成种的种群特点所决定。在一些生命周期短(一年左右)、生长速度快(新生个体当年可以长成)的种处于优势的情况下,生物数量的季节变化就比较显著;而生命周期长、其种群由多个年龄组的个体构成的种占优势的情况下，一年之中种群数量就相对稳定。另一方面,底栖生物数量的急剧改变又决定于经济种的捕食活动和优势种的生物学过程。台湾海峡系经济鱼、虾类的集中分布区,尤以上升流区范围内的集群最密集。为了便于深入研究上升流与经济鱼、虾类资源的关系,本文着重探讨上升流范围内底栖生物数量的动态特点。  相似文献   

A Computational Model for Velocity Separation in Shallow Sea   总被引：1，自引：0，他引：1  

SONG  Zhiyao 《中国海洋工程》2002,16(3):407-413

Based on the hydrodynamical feature and the theoretical velocity profiles of tidal flow and vvind-induced flow in shal-low sea, a computational model is established for the first time, which can separate observed velocity into tidal velocity and wind-induced velocity by use of the least square method. With the model, not only the surface velocities of tidal flow and vvind-induced flow are obtained, but also the bed roughness height is determined and the wind velocity above the wa-ter surface is estimated. For verification of the model, the observed velocity in the Yellow River Estuary and the laborato-ry test is separated, then it is applied to the Yangtze River Estuary. All the results are satisfactory. The research results show that the model is simple in method, feasible in process and reasonable in result. The model is a valid approach to analysis and computation of field dala, and can be applied to separate the observed velocity in shallow sea; at the same time, reasonable boundary conditions of th  相似文献   

Wave Loads and Protective Techniques of An On-Shore Wave Power Device     

You Yage YuZhi Associated Professor  Guangzhou Institute of Energy Conversion  Chinese Academy of Sciences  Guangzhou . Professor  Guangzhou Institute of Energy Conversion  Chinese Academy of Sciences  Guangzhou 《中国海洋工程》1995,(4)

In this paper, the extreme wave loads on an on-shore wave power device are investigated. First, boundary element method is applied to solve the three dimensional potential problem based on the small amplitude wave assumption. Then the motion of the Oscillating Water Column (OWC) inside the device and its laods on the device are calculated in time domain. Several protective techniques often applied are simulated by changing the constraint of the upper end of the chamber of the device. Numerical results are used to judge the effectiveness of these techniques. The investigation shows that damping can not effectively restrain the motion of OWC when the period of incident wave is long, which may cause dangerous loads on the structure. The shut chamber can effectively restrain the motion of OWC, but alternatively cause high pressure in the chamber. A Contracting opening with a Taper (CT) can exhaust a great amount of kinetic energy of OWC, and significantly decrease the loads. It is a promising protective tec  相似文献   

Effect of Berm Width and Elevation on Irregular Wave Run-Up     

Chen Guoping  Yu Kuang-ming  Zhang Jiachang Assistant Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing Prof.  Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1991,(4)

This paper discusses the effect of berm width and elevation of composite slope on irregular wave run-up. Based on the data obtained from model tests, the formula and distribution of irregular wave run-up on composite slope are derived. The changing of wind speed, width and elevation of the berm are considered comprehensively. The wave run-up with various exceedance probability can be es-timated utilizing the distribution curves of irregular wave run-up.  相似文献   

Numerical Analysis of Wave Forces on Arbitrarily Shaped Multi-Pillars Over Varying Topography     

Zhang Libang Research Engineer  First Institute of Oceanography  Qingdao 《中国海洋工程》1991,(4)

The modified hybrid element method (MHEM) is utilized to predict and analyze wave forces on arbitrarily shaped multiple bodies. This method can be applied to waves of all water depths, i. e. shallow, intermediate, and deep waters, on slowly varying seabed. The MHEM employs the ICCG method to save CPU and storage, thus the computation of wave forces for large multi-body systems can be carried out on microcomputers. Numerical results of the present method are compared with experimental data and other solutions. It is shown that the MHEM provides more accurate solutions of the wave forces than other numerical methods do. Therefore, the methodology presented herein can be used in the design of coastal and ocean structures.  相似文献   

螺旋藻多糖对给予环磷酰胺BALB/C小鼠的保护作用研究   总被引：7，自引：1，他引：7  

王友顺  黎露刚  吴侃  谢宗华  唐庆  倪金星  汪庭  方光如 《海洋科学》1997,21(6):36-39

研究了螺旋藻多糖（ＰＳ）对环磷酰胺（ＣＹ）引起的ＢＡＬＢ／Ｃ小鼠造血功能等损伤的保护作用。当给小鼠ＣＹ时能同时给予ＰＳ时，就能大大减轻因给予ＣＹ经起的造血功能障碍；能明显减缓动物因使用ＣＹ的致的体重下降以及能明显减低因ＣＹ作用的死亡率，提示使用ＰＳ对预防或减轻化疗制剂的危害是具有明显作用的。为临床化疗、放疗病人使用ＰＳ提供了依据。  相似文献   

Species composition and distribution of marine nematode community in the North Taiwan Strait   总被引：9，自引：4，他引：9  

Cai Lizhe  Hong Huasheng  Zou Chaozhong  Fang Shaohu  L&#; Xiaomei  Zhang Yueping 《海洋学报(英文版)》2001,20(2):221-229

I~IOW~ne nelnatode is a ban gIOup of benthic OrgAnsrns. Abbot 5 000 spotes Of free-livingnelnatedes have ben dedbo so far, and it has ho estimated that abbot 20 (XX) are as yetunknoWn. Chinese bothologist has Paid attention to marine nelnatodes in China seas in yare. The spatial distribution and shoes commotion of marine nelnatedes in the HUanghe EstUary, Qinhuangdao waters, QingdaO Bay and Xiamen ~ have ho reported (Zhang etal., 1990, 1991, 1993; ac and Li, 1998). ~ new shoes in the…  相似文献   

海水分光反射率与叶绿素浓度的相关分析     

傅克忖  曾宪模 《海洋科学进展》1995,(1)

通过对东京湾两年度不同季节海水分光反射率与叶绿素浓度进行统计分析，结果表明，叶绿素浓度Ｃ与两谱段分光反射率之比Ｒｗ（λｊ）／Ｒｗ（λｊ）具有幂函关系Ｃ＝Ａ［Ｒｗ（λｊ）／Ｒｗ（λｊ）Ｂ。两者的对数显示出较好的线性关系，即ｌｏｇＣ＝ｌｏｇＡ＋Ｂｌｏｇ［Ｒｗ（λｊ）／Ｒｗ（λｊ）］。负相关系数达０．９９。相关方程之一为Ｃ＝３．３２９［Ｒｗ（５２０）／Ｒｗ（５５０）］－１．３８４（１９８７年６月初）．在梅雨季节之后，相关方程为Ｃ＝１２．６８［Ｒｗ（５２０）／Ｒｗ（５５０）］－２．０１０（１９８８年８月）。这表明了海湾或混浊的沿岸水质，在叶绿素浓度算法中，统计参数Ａ和Ｂ的确立，要基于不同季节不同水质的现场观测资料。  相似文献