THE SIMULATION OF THE SAR IMAGE OF INTERNAL SOLITARY WAVES IN ALBORAN SEA

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＯｃｅａｎｉｎｔｅｒｎａｌｗａｖｅｉｓａｋｉｎｄｏｆｇｒａｖｉｔｙｗａｖｅｇｅｎｅｒａｔｅｄｉｎｔｈｅｓｔｒａｔｉｆｉｅｄｏｃｅａｎ .Ｉｔｐｒｏｄｕｃｅｂｙｔｈｅｉｎｔｅｒａｃｔｉｏｎｏｆｔｉｄｅｃｕｒｒｅｎｔａｎｄｔｏｐｏｇｒａｐｈｙ ,ｓｅａｑｕａｋｅａｎｄｍｏｖｉｎｇｓｈｉｐｗｈｅｎｔｈｅｓｔｒｏｎｇ ,ｓｈａｌｌｏｗｐｙｃｎｏｃｌｉｎｅｉｓ ｐｒｅｓｅｎｔ.Ｔｈｅｉｎｔｅｒｎａｌｗａｖｅｓｉｎｔｈｅｃｏｎｔｉｎｅｎｔａｌｓｈｅｌｆａｒｅａｌｍｏｓｔｔｉｄｅｐｒｏｄ…     

A STUDY OF OSCILLATING FLOWS OVER PROPAGATING RIPPLES:PART I. STEADY STREAMING

1.　ＩＮＴＲＯＤＵＣＴＩＯＮＯｓｃｉｌｌａｔｉｎｇｆｌｏｗｓｏｖｅｒｐｅｒｉｏｄｉｃｒｉｐｐｌｅｓａｒｅｏｆｐｒａｃｔｉｃａｌａｓｗｅｌｌａｓｓｃｉｅｎｔｉｆｉｃｉｎｔｅｒｅｓｔｂｅｃａｕｓｅｏｆｔｈｅｉｒｒｅｌｅｖａｎｃｅｔｏｂｅａｃｈｐｒｏｃｅｓ...     

PREDICTION OF CHARACTERISTICS FOR VERTICAL ROUND NEGATIVE BUOYANT JETS IN HOMOGENEOUS AMBIENT

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＯｎｅｏｆｔｈｅｆｌｏｗｃｏｎｆｉｇｕｒａｔｉｏｎｓｉｍｐｏｒｔａｎｔｉｎｔｈｅｅｎｖｉｒｏｎｍｅｎｔａｌ ｐｒｏｃｅｓｓｅｓ ,ｗｉｔｈｓｉｇｎｉｆｉｃａｎｔｂｕｏｙａｎｃｙｅｆｆｅｃｔｓ,ｉｓａｖｅｒｔｉｃａｌｎｅｇａｔｉｖｅｂｕｏｙａｎｔｊｅｔｄｉｓｃｈａｒｇｅｄｉｎｔｏａｓｔａｇｎａｎｔｅｎｖｉｒｏｎｍｅｎｔ .Ａｎｅｘａｍｐｌｅｉｓａｎｉｎｄｕｓｔｒｉａｌｄｉｓｃｈａｒｇｅｓｕｃｈａｓｂｒｉｎｅ ,ｗｈｉｃｈｉｓｒｅｌｅａｓｅｄｉｎｔｏｔｈｅｏｃｅａｎｔｈｒｏｕｇ…     

Horizontal Flux of Biogenic Elements through PN Section in April 1994

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＯｂｊｅｃｔｉｖｅｏｆＯｃｅａｎＦｌｕｘＳｔｕｄｙｉｎｔｈｅＳｈｅｌｆＭａｒ ｇｉｎｏｆｔｈｅＥａｓｔＣｈｉｎａＳｅａｉｓｔｏｕｎｄｅｒｓｔａｎｄｔｈｅｖａｒｉｏｕｓｏｃｅａｎｉｃｐｒｏｃｅｓｓｅｓｃｏｎｔｒｏｌｌｉｎｇｔｈｅｖｅｒｔｉｃａｌｆｌｕｘｅｓｏｆｃａｒ ｂｏｎａｎｄｏｔｈｅｒｂｉｏｇｅｎｉｃｅｌｅｍｅｎｔｓａｎｄｔｈｅｍａｊｏｒｒｏｌｅｉｎｈｏｒｉｚｏｎｔａｌｍａｓｓｒｅｐｌａｃｅｍｅｎｔａｎｄｒｅｄｉｓｔｒｉｂｕｔｉｏｎｐｌａｙｅｄｂｙｔｈｅｏｃｅａｎｃ…     

2-ORDER TURBULENCE CLOSURE PLANKTON ECOSYSTEM DYNAMICS MODEL AND ITS APPLICATION

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＯｎｃｅ ｐｅｏｐｌｅｂｒｏｋｅｔｈｒｏｕｇｈｔｈｅｌｉｍｉｔａｔｉｏｎｏｆｔｒａｄｉｔｉｏｎａｌｅｃｏｌｏｇｙｔｏｓｔｕｄｙｏｎｔｈｅｓｔａｔｉｃｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｂｉｏｌｏｇｙａｎｄｉｔｓｅｎｖｉｒｏｎｍｅｎｔａｎｄｃａｍｅａｂｏｕｔｔｏｓｔｕｄｙｔｈｅｍｅｃｈａｎｉｓｍｏｆｔｈｅｉｒｉｎｔｅｒａｃｔｉｏｎｉｎｖｉｅｗｏｆｂｉｏｃｈｅｍｉｓｔｒｙａｎｄｅｎｖｉｒｏｎｍｅｎｔｄｙｎａｍｉｃｓ,ｅｃｏｓｙｓ ｔｅｍｄｙｎａｍｉｃｓｇａｉｎｅｄｗｉｄｅ…     

SEASONAL CIRCULATION IN THE NORTHWESTERN TROPICAL PACIFIC OCEAN DIAGNOSED WITH THE ASSIMILATION DATA FROM 1989 THROUGH 1997

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｈｅｗｅｓｔｅｒｎｅｑｕａｔｏｒｉａｌＰａｃｉｆｉｃＯｃｅａｎ ,ｔｈｅｖｉｇｏｒｏｕｓａｎｄｃｏｍｐｌｅｘｃｉｒｃｕｌａｔｉｏｎｉｓｃｈａｒａｃｔｅｒｉｚｅｄｂｙｔｈｅｕｎｉｑｕｅｃｏｎｖｅｒｇｅｎｃｅｏｆｔｈｅｓｕｒｆａｃｅｃｕｒｒｅｎｔｓ,ｐｅｒ ｍａｎｅｎｔ,ｓｅａｓｏｎａｌａｎｄｍｅｓｏｓｃａｌｅｅｄｄｉｅｓ ,ａｎｄｓｕｂｓｕｒ ｆａｃｅｃｕｒｒｅｎｔｓ.Ａｓａｎｉｍｐｏｒｔａｎｔｃｏｎｔｒｉｂｕｔｏｒｔｏｔｈｅｅ ｑｕａｔｏｒｉａｌａｎｄｇｌｏｂａｌｍｏｍ…     

POTENTIAL APPLICATION FOREGROUND OF OCEAN MODE IN NAVY OCEANOGRAPHY

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＪｕｓｔａｓｌｉｇｈｔｃａｎｂｅｄｅｃｏｍｐｏｓｅｄｉｎｔｏ 7ｃｏｌｏｒｓａｎｄｍｕｓｉｃｉｎｔｏ 7ｎｏｔｅｓ,ｔｈｅｃｏｍｐｌｅｘｖｅｒｔｉｃａｌｐｒｏｆｉｌｅｓｏｆｏｃｅａｎｄｙｎａｍｉｃａｌｆａｃｔｏｒｓａｎｄｓｏｕｎｄｓｐｅｅｄｃａｎａｌｓｏｂｅｄｅｃｏｍｐｏｓｅｄｉｎｔｏａｓｅｒｉｅｓｏｆｎｏｒｍａｌｍｏｄｅｓ[1～ 5] .Ｂａｓｅｄｏｎｔｈｉｓｆａｃｔ,ｉｎｔｈｅｅａｒｌｙ 1 980ｓＡｍｅｒｉｃａａｃｔｕ ａｌｉｚｅｄｔｈｅＯｃｅａｎｉｃＡｃｏｕｓｔｉｃＴｏｍｏｇ…     

EXTRACTION OF INTERNAL TIDE FROM CURRENT

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｒｎａｌｗａｖｅｓｍａｙｅｘｉｓｔｉｎａｎｙｂｏｄｙｏｆｗａｔｅｒｗｉｔｈｄｅｎｓｉｔｙｓｔｒａｔｉｆｉｃａｔｉｏｎ (Ｏｓｂｏｒｎｅ ,1 978) .Ｌａｒｇｅ ａｍｐｌｉｔｕｄｅｉｎｔｅｒｎａｌｗａｖｅｓａｒｅｖｅｒｙｉｍｐｏｒｔａｎｔｆｏｒｐｏｒ ｂｌｅｍｓｏｆａｃｏｕｓｔｉｃａｌｃｏｍｍｕｎｉｃａｔｉｏｎｏｖｅｒｌａｒｇｅｄｉｓ ｔａｎｃｅｓ,ｆｏｒｈｙｄｒａｕｌｉｃｅｎｇｉｎｅｅｒｉｎｇｏｆｄｅｅｐｗａｔｅｒｃｏｎ ｓｔｒｕｃｔｉｏｎｓａｎｄｆｏｒｔｈｅｓａｆｅｔ…     

A STUDY OF OSCILLATING FLOWS OVER PROPAGATING RIPPLES:PART Ⅱ. VORTICITY DYNAMICS

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＡｈｏｒｉｚｏｎｔａｌｂａｃｋ ａｎｄ ｆｏｒｔｈｍｏｔｉｏｎｐｒｏｄｕｃｅｄｎｅａｒａｓａｎｄｂｅｄｂｙ ｐｒｏｇｒｅｓｓｉｖｅｇｒａｖｉｔｙｗａｖｅｓｐｒｏｐａｇａｔｉｏｎｉｎｓｈａｌｌｏｗｗａｔｅｒｕｓｕａｌｌｙｇｉｖｅｓｒｉｓｅｔｏｎｅａｒｌｙｓｙｍｍｅｔｒｉｃａｌｂｅｄ ｆｏｒｍｓｃｏｍ ｍｏｎｌｙｋｎｏｗｎａｓｒｉｐｐｌｅｓ .Ｏｓｃｉｌｌａｔｉｎｇｆｌｏｗｓｏｖｅｒｐｅｒｉｏｄｉｃｒｉｐｐｌｅｓａｒｅｏｆｐｒａｃｔｉｃａｌａｓｗｅｌｌａｓｓｃｉ ｅｎｔｉｆｉｃ…     

MECHANISM OF SOUND GENERATION BY FLOW OVER TWO CAVITIES IN TWO DIMENSIONS

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＷｈｅｎｈｉｇｈ ｓｐｅｅｄａｉｒｆｌｏｗｏｒｃｕｒｒｅｎｔｐａｓｓｅｓｏｖｅｒｇａｐｓｏｒｃａｖｉｔｉｅｓｉｎａｆｌａｔｐｌａｔｅ ,ｓｅｌｆ ｅｘｃｉｔｅｄｏｓｃｉｌｌａｔｉｏｎｓｍａｙｏｃｃｕｒ ,ｌｅａｄｉｎｇｔｏｄｒａｍａｔｉｃｐｒｅｓｓｕｒｅａｎｄｖｅｌｏｃｉｔｙｆｌｕｃｔｕａｔｉｏｎａｎｄｉｎｔｅｎｓｉｖｅｎｏｉｓｅ .Ｔｈｅｓｅｐｈｅｎｏｍｅｎａｍａｙａｐｐｅａｒｉｎｍａｎｙｅｎｇｉｎｅｅｒｉｎｇａｐｐｌｉｃａｔｉｏｎｓ .Ｆｏｒｅｘａｍｐｌｅ ,ｗｅａｐｏｎｂ…     

FISSION LAWS OF INITIALLY INTERFACE SOLITARY WAVES IN TWOLAYER OCEAN

A 2 D KdV equation of two-layer stratified ocean with 2-D topography is recapitulated in the present paper. Based on a reduced version of this 2-D KdV equation, the fission laws of the initially internal solitary waves are studied by means of numerical calculation. From the numerical results, it is shown that the initially interface solitary waves can fission on the continental slope like the initially surface solitary waves and the fission process is a significant generating mechanism of internal interface soliton packet on the continental shelf.     

有限深两层流体中内孤立波传播演化理论模型研究

该文对Choi和Camassa给出的一个内孤立波方程模型中的系数进行了修正,并给出了基于方程的内孤立波定态解表达式,将其称为内孤立波me Kd V理论解,进而采用有限体积/有限差分混合方法数值求解内孤立波的三类(Kd V、e Kd V和me Kd V型)非线性传播演化方程,分别以内孤立波的Kd V、e Kd V、MCC和me Kd V定态解作为初始输入波,研究其非线性传播演化特性,并获得其适用性条件。结果表明,三类非线性传播演化方程,只适合于相应内孤立波定态解初始波的定态传播,而对其他定态解初始波将发生波形变形、分裂等非线性现象。在此基础上,定量地给出了三类非线性传播演化方程的适用性条件,为采用何种非线性方程来研究实际海洋中内孤立波的传播演化问题提供了理论依据。     

A NEW HIGH ORDER SCHEME FOR CONVECTION EQUATION AND ITS APPLICATION

1. INTRODUCTIONThe choice of computational scheme for the convection term is the most difficult problem in numerical simulation of flow. Due to the development of modern numerical methods and practical needs for more efficient simulation, higher order sch…     

NONLINEAR INTERFACIAL CAPILLARY-GRAVITY WAVES IN SHEAR FLOW

In this paper,the capillary-gravity solitary waves in a two-fluid system withshear flow are theoretically investigated.Three cases are considered.For the first case(the nor-mal case),the KdV equation,with the effect of shear flow being taken into account,is derivedand it is found that there may exist single mode travelling solitary waves,slowly travelling soli-tary waves and even more slowly travelling solitary waves at some shear flow conditions.Thesecond case considered is that the fluid system is at the first kind critical condition.The modifiedKdV equation in which the cubic nonlinearity balances the dispersion is obtained and the solutionof mKdV solitary wave in shear flow is put forward.The third case is that the fluid system is atthe second kind critical condition.The generalized KdV equation with the effect of shear flowconsidered is given.It is shown that there exist normal and oscillatory solitary waves and thecondition of existence of oscillatory solitary waves are also presented.     

海洋内孤立波作用下张力腿平台动力响应特性

基于三类内孤立波理论KdV、eKdV和MCC的适用性条件,将张力腿简化为非线性梁模型,采用Morison和Froude-Krylov公式计算张力腿平台的内孤立波动态载荷,结合浮体有限位移时域运动方程,建立了内孤立波与张力腿平台相互作用的理论模型。以东沙群岛附近海域某实测内孤立波为对象,对典型张力腿平台(ISSC-TLP)在内孤立波作用下的动态载荷、运动响应以及张力腿张力的变化特性进行数值分析。研究表明,内孤立波不但对张力腿平台产生突发性冲击载荷,使其产生大幅度的纵荡位移,还会显著增加张力腿的张力。因此,在张力腿平台的设计应用中,内孤立波的影响不可忽视。     

两层模式下内波K-dv方程的频散关系

为了更好地了解内孤立波的特性，分别利用椭圆余弦波方法和摄动展开方法，对两层模型下内孤立波K-dv方程的频散关系进行了推导。结果显示：利用后一种方法得到的两层模式下内孤立波K-dv方程的频散关系是一种方便、实用的解析式。据此解析式可进一步得到内孤立波半波宽度与内波波数间的关系，从而可将内孤立波理论与内波合成孔径雷达（SAR）图像联系起来。用此解析式计算得到的内孤立波频率和相速度与实测结果具有很好的一致性，因而为进一步进行分析和利用数据估计内孤立波的部分参数提供了理论依据。对解析式中频散项和非线性项量级的进一步分析认为，非线性项的作用在从SAR图像中提取内波振幅等参数时最好不予忽略。     

三层流体系统中初始扰动和密度比对孤立波生成的影响

本文讨论了初始扰动和密度比对三层流体系统中孤立波生成的影响出发点是所导得的ＫｄＶ方程和散射反演理论的结果。分析结果表明，增加初始扰动的高度和宽度会生成更多的孤立波，这与Ｍａｘｗｏｒｔｈ＾［３］的实验结果一致；此外，在较弱分层情形，密度比对孤波生成的影响极小，而在较强的分层情形，其影响较大。     

关于非线性浅水波理论中的孤立波解

本文在[1]的基础上,详尽地得到了Boussinesq方程和KdV方程的孤立波解,并对波高和波形进行了细致的分析。为了更好地比较,本文还给出了高阶摄动的孤立波解。     

NONLINEAR WATER WAVES IN LAGRANGIAN COORDINATES:SHALLOW FLUIDS

ＮＯＮＬＩＮＥＡＲＷＡＴＥＲＷＡＶＥＳＩＮＬＡＧＲＡＮＧＩＡＮＣＯＯＲＤＩＮＡＴＥＳ：ＳＨＡＬＬＯＷＦＬＵＩＤＳＴｉａｎＭｅｉ；ＺｈｕＹｏｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＭａｔｈｅｍａｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ，Ｓｈａ...     

波状水跃和波状涌潮的分析

推导了涌潮中尺度方程，并利用此方程，分析水跃和涌潮的性质，对于水跃和涌潮，色散与耗散两种效应强弱的价值依赖于Ｆｒｏｕｄｅ数的函数，存在着两个临界值，当跃前Ｆｒｏｕｄｅ数大于第一个临界值时，水跃和涌潮从单调形态转化为波动形态，随后，波陡随Ｆｒｏｕｄｅ数增大，当Ｆｒｏｕｄｅ数大于第二个临界值时，自由表面破碎，波状涌潮转化为强涌潮，对于涌潮，绝对流速，即落潮流速，对色散波的周期，波长与振幅也有影响。数值