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   

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   

TOWARD ESTABLISHING THE CONCEPT OF PHYSICAL URBAN AREA IN CHINA   总被引：1，自引：0，他引：1  

Zhou Yixing  Shi Yulong 《地理学报(英文版)》1995,(4)

I.IntroduchollWiulegeOgraphystudiestheterritoria1systemsabouttherelationsbforeenhumanbeingSandthenature[I4],urbanmpaphyfocusesspecificallyonthespatialoopltizationandprocessofurbanterritory,anditsinteraCtionwiti1Otherterritorialsystems.Usually,wedoresearch…  相似文献   

MODERNIZATION PROCESS IN HISTORICAL ASIAN CITIES AND THEIR CHARACTERISTICS: A COMPARATIVE STUDY ON SEOUL, TOKYO AND BEIJING     

Li Wenyan 《地理学报(英文版)》1995,(2)

Thspaperwaspresatedatthe"94SeoulIntemationalSyInPosiumonCityandffistory"heldonOCtober27to28,l994andthenpublishedinTheJoumaIofSeouIShndesVo.IV.Thepresentvisionhasbeenslighlyrevised.Bejing,SeoulandTokyoarecapitalsofthreeneighbouringcoUnnesinNortheastAsia,wh…  相似文献   

开拓国际工程建设市场方面的经验     

中国港湾建设 《中国勘察设计》2005,(1):103-105,108

随着全球经济一体化趋势的进一步发展，21世纪的全球商务活动和经济活动必然随着生产分工的逐步细分而逐步淡化国家的概念。国家与国家之间的经济关系表现为一种相互依赖但又有其独立性的特点。世界级的跨国公司通过其在各个国家的分公司或分支组织，对这种商务活动依据其本身的利益，依据市场进行宏观的组织管理。  相似文献   

大力实施国际化经营战略努力开拓国际工程建设市场     

中国石油工程建设 《中国勘察设计》2005,(1):109-111

中国石油工程建设(集团)公司(中文简称：中国石油工程公司，英文缩写：CPECC)是中国最早进入国际工程承包市场的公司之一。1980年经国务院批准，开始经营对外工程承包和劳务合作业务，现已发展成为中国石油天然气集团公司在国际油气工程建设领域最具有代表性的公司，是中国最大的国际工程总承包企业之一。  相似文献   

工程总承包有关问题探讨     

上海现代建筑设计 《中国勘察设计》2005,(12):46-47,51

一．工程总承包以设计还是施工为龙头的探讨 关于设计-施工总承包龙头的讨论已经有多年。在这一过程中，始终有“以设计为龙头”和“以施工为龙头”的两种不同的见解和主张。无论是设计还是施工单位，都应当全面认识建筑业价值链的各个环节，认识到设计环节在建筑业价值链中占据主导地位。  相似文献