WATER MASS FORMATION IN THE SOUTH INDIAN OCEAN BY AIR-SEA FLUXES     

Ming Feng 《热带海洋学报》2004,23(6):16-21

1Introduction　TheIndianCentralWater (ICW) ,formedandsubductedintheSubtropicalConvergenceintheSouthIndianOcean ,occupiesasignificantportionofthethermoclineintheIndianOcean[1,2 ]　 (Fig .1 ) .TheSubantarcticModeWater(SAMW)isformedinthe 2 6.5-2 7.1σθrangenorthoftheSub antarcticFront—thesouthernboundaryofthesubtropicalgyres[3]　 .InthesoutheastIndianO cean ,theSAMWisthethickest,ventilatedasathicklayerofhighoxygenextendingtothetropicalIndianOcean[4 ,5 ]　 .　Watermasstransformation…  相似文献   

Non-Simultaneous Failure of Ice in Front of Multi-Leg Structures   总被引：4，自引：1，他引：4  

SHI  Qingzeng 《中国海洋工程》2002,16(2):183-192

Because the multi-leg jacket structure is the major type of offshore structures in the Bohai Sea, the study of non-si-multaneous failure of i鏴 on multi-leg structures is important. However, the non-simultaneous failure has not been consid-ered in engineering design until now, obviously resulting in costly design and notable waste. To resolve this problem, this paper, by means of analysis of experimental data, calculates the coefficient of the non-simultaneous failure for the double-pile structure, the square four-leg structure, the single-line multi-pile structure, and the conical structure, respectively, and provides some reference criteria for engineering design.  相似文献   

Two new species of Lecithochirium LUKE, 1901(Trematodes: Hemiuridae)     

Liu Shengfa 《台湾海峡》1996,(4)

1.Lecithochiriumfukenensissp.nov.(Fig.1)(Basedon6wholemounts)ThisspiceswascollectedinthestomachofTrichiurushaumelafromXiamenandNan'ao.Bodydividedintosomaandecsoma.Soma1,31~3.48×0.426~1.05(2.69×0.737),ecsoma0.22~0.80(0.448)longwhenprotruded,usuallycomple…  相似文献   

Wave Reflection Caused by Wave Overtopping and Sloping Top of Spructure     

LI  Yanbao 《中国海洋工程》2002,16(2):211-218

In this paper, the theoretical analysis and experimental studies are employed to investigate the reflection characteris-tics of partial standing waves caused by wave overtopping and sloping top of structures. Based on the principle of conser-vation of wave energy flux, the third-order Stokes wave theory is used to formulate the reflection coefficient at wave overtopping; the calculation results are regressed into an applied expression. A series of experiments of wave reflection for a vertical-wall structure with chamfered and overhanging upper sections are carried out to investigate the influence of top slope on wave reflection. The regularity of variation of wave reflection in this case is analysed based on the experimental results.  相似文献   

内部转塔锚泊生产储油船的发展研究   总被引：1，自引：0，他引：1  

马志良  黄祥鹿  马培荪  范根发  俞湘三  金德贤 《海洋工程》1991,(2)

内部转塔锚泊生产储油船是海上石油浮式生产系统适用于深水及恶劣环境条件的一种新型生产系统。本文对锚泊系统的动力分析、转塔装置的性能研究、生产储油船船型设计研究、系统模型在风浪流水池中的系泊试验、船体结构的强度分析等基本问题进行了比较全面的综合性研究。研究结果表明,此种生产系统对我国近海油田非常适用,在技术上也是完全可行的。  相似文献   

锌对虾夷扇贝和刺参幼体的毒性效应   总被引：11，自引：1，他引：11  

朱丽岩  吕建发  唐学玺  高象贤  徐怀恕 《海洋通报》1999,18(4):34-37

以虾夷扇贝和刺参幼体为材料,采用急性毒性试验和亚急性毒性试验的方法,研究了锌对虾夷扇贝稚贝及幼贝和刺参幼虫的毒性效应。结果显示,锌对虾夷扇贝稚贝的２４ｈＬＣ５０ ６．４０ｍｇ／Ｌ,４８ｈＬＣ５０为３．３１ｍｇ／Ｌ,７２ｈＬＣ５０为１．３９ｍｇ／Ｌ,９６ｈＬＣ５０为０．６１ｍｇ／Ｌ;而对幼贝的２４ｈＬＣ５０为３．３２ｍｇ／Ｌ,４８ｈＬＣ５０为２．６４ｍｇ／Ｌ。７２ｈＬＣ５０为１．７６ｍｇ／Ｌ,９６ｈ  相似文献   

Effect of the Twin Jetties as A Regulating Structure at the Tao-er Estuary     

LU  Peidong 《中国海洋工程》2002,16(2):219-226

The phase one project of the twin jetties at the Tao-er Estuary yields no effect on the flow, and there is a large area of deposition. A numerical model is employed to simulate the flow field, and the scouring and silting in the channel be-tween the two jetties are analyzed. The results show that the effective tidal flux between the two jetties is reduced due to the notch located at the heel of the east jetty, and the effect of contraction-flush is not obvious. As for the regulation of this kind of estuary under the tide action, the capability of tidal flux should be fully used.  相似文献   

Numerical Simulation of Non-Linear Wave Propagation in Waters of Mildly Varying Topography with Complicated Boundary     

ZHANG  Hongsheng 《中国海洋工程》2001,(1):37-52

In this paper, the characteristics of different forms of mild slope equations for non-linear wave are analyzed, and new non-linear theoretic models for wave propagation are presented, with non-linear terms added to the mild slope equations for non-stationary linear waves and dissipative effects considered. Numerical simulation models are developed of non-linear wave propagation for waters of mildly varying topography with complicated boundary, and the effects are studied of different non-linear corrections on calculation results of extended mild slope equations. Systematical numerical simulation tests show that the present models can effectively reflect non-linear effects.  相似文献   

RATIONAL UTILIZATION OF MOUNTAIN SOILS IN SOUTHEAST QINGHAI-XIZANG (TIBETAN)PLATEAU     

Li Mingsen 《地理学报(英文版)》1996,(4)

ISoil-fo~gEnvironmentandMainSoilTrocsThesoLItheastQinghai-Xizang(Tibetan)PlateauwheretheHengduanMoUnains,eastempartoftheThmalayanandNyainqentanglhamoUnainsarelocatedextendsfrom25'to34"Nand92'to1O5'Ewithanareaof5OO,OOOkm',oraboutone-fiffooftheentireQinghai-XiZangPlateau.ItisatransitionalzoneofdeePdisseCtedmoUntainseXtendingsoutheastWardpenpherallowlandsandwichedin-betWeenSichuanBasinandcentralYunnanPlateau.Whletheterrainofthesmponinclinestosoutheast,thealtitudeofthevaIleysraises…  相似文献   

THEORY AND PRACTICE FOR COMPILING THE ATLAS OF NATURAL DISASTERS IN CHINA     

Wang Jingai 《地理学报(英文版)》1994,(Z2)

CompilinganatlasofnaturaldisastersinChinaisabasistoresearchintoregionaldisasterssystems,torevealthetemPOralandspatialpatternofnaturaldisasters,aswellastoestablishcountermeasuresopinstnamraldisasters.TaldngtheuAtlasOfNaturalDisastersinChina"**asanexample,thisarticleinquiresintotheoreticalandpracticalproblemsaboutcompilinganatlasofregionalnaturaldisasters.ThebasictheoryofcompilinganatlasOfregionaldisastershasbeenfOundedonthecombinati0nofthesciencesofdisasters,cart0graphyandregiotalmhy.Theref…  相似文献