排序方式: 共有102条查询结果,搜索用时 78 毫秒
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ThefeminizationofmigrationinthePearlRiverDeltaDAIFanGuangzhouEnglishLanguageCenter,ZhongzhanUniversity,Guangzhou510275Abstra... 相似文献
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Distributional features of δ~(18) O in precipitation in China 总被引:2,自引:0,他引:2
ZHANG XinpingDepartment of Geography Hunan Normal University Changsha CHINAYao TandongLanzhou Institute of Glaciology Geocryology CAS Lanzhou CHINA 《地理学报(英文版)》1998,(2)
Distributionalfeaturesofδ18OinprecipitationinChinaZHANGXinpingDepartmentofGeography,HunanNormalUniversity,Changsha410081CHINA... 相似文献
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REN Hongzun TANG DengyinInstitute of Geography Chinese Academy of Sciences Beijing CHINA 《地理学报(英文版)》1998,(2)
Mechanismforcontrolingdroughtandsalinity/waterlogginginNorthwestShandongProvinceRENHongzunTANGDengyinInstituteofGeography,Ch... 相似文献
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Zhao Yin WANG Qishun ZHANG Shaoling HEInternational Journal of Sediment ResearchVol. No. June STABILIZATION OF THE YELLOW RIVER CHANNEL DEVELOPMENT OF THE DELTAZhao Yin WANG Qishun ZHANG Shaoling HE 《国际泥沙研究》1998,(2)
STABILIZATIONOFTHEYELLOWRIVERCHANNELANDDEVELOPMENTOFTHEDELTAZhaoYinWANG1,QishunZHANG2andShaolingHE3ABSTRACTTheYelowRiverdelta... 相似文献
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潮汐观测历来是海洋观测站最重要的观测项目。潮汐对于沿岸建筑物和进出港的船只安全有直接影响。远离祖国的南极长城站,在岸边建立科学实验室和观测站,铺设上、下水管道和通讯电缆必需知道这里的最高可能潮位;进出港口的考察船和运货船,从海上来访的外国船必需了解这里的涨、落潮时间;在这里建造码头,设计它的长度、高度 相似文献
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本文对1987年1月5日至3月7日在南极长城站海湾获取的潮位观测记录进行了分析。结果表明:这里的潮汐属于不正规半日潮,最大可能潮差按公式2(1.29H_(M2)+1.23H_(s2)+H_(k1)+H_(01))计算为2.944m。对其近海的潮波,以及潮位对气压变化的响应做了初步分析。 相似文献
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文献[1]介绍了在南极长城站进行的潮汐观测,文献[2]统计和计算了潮汐特征值,文献[3]利用1987年夏季观测资料对潮汐特征做了初步分析.本文使用新获得的1987年3月至1988年2月连续观测资料,对这里的潮波传播、潮汐性质、日潮不等、潮差和水位等潮汐现象进行分析,并就水文、气象因素对平均水位的影响初步进行探讨. 相似文献
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DETERMINATION OF THE DIRECTION AND VELOCITY OF INTERNAL TIDE WAVE BY MEANS OF MEASUREMENTS AT SINGLE STATION 总被引:1,自引:0,他引:1
In this paper, the method for determining the direction and velocity of internal tide wave is proposed. The main points are as follows: (1) starting with the continuity equation of incompressible fluid and taking the isotherm whose balance position is situated in the middle of the thermocline as the interface of two-layer ocean, one can get an equation of variations of average total current in the lower and upper layers; (2) WTide (Z) in the above-mentioned equation is expressed in first-order approximation; (3) the internal tide waves are treated as wave packets. Thus, one finds out a statistical relation, AΔu BΔv =ζ, which correlates the average shear effect caused by the internal tide wave with the isothermal fluctuation. The direction and velocity of the wave can be drawn from the formulae: (((1=Arctg (A/B), C1=1/(H0(A2 B2)~1/2).The calculated results agree, in the main, fairly well with two sets of observations at station L3. 相似文献
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