SEDIMENT TRANSPORT IN THE YANGTZE RIVER ESTUARY     

SHEN Zhigang Department of Engineering Mechanics  Shanghai Jiao Tong University  Hua Shan Road  Shanghai  China. 《国际泥沙研究》2001,16(2)

SEDIMENT TRANSPORT IN TIIE YANGTZE RIVER ESTUARYSHEN Zhigang'ANSTa^CTThe hy~ntalc and the sedimen tranSport Patter'nS within the estUaIy of the YangtZe mver arecomPlex because of intemehon of fluvial and the hdal forCes, depending on freshwate discharge andhdal range. Based on the data measuIed in meent years, thes papo discusses the characterishcs of flowand sNnt movemen in the tw forer EstUaIy and their iIifluences on the evolution of theestuaryKey W: YangtZe mver…  相似文献   

山东省干旱演变规律及其影响   总被引：2，自引：0，他引：2  

杨志刚  杨洪昌 《气象》1996,22(5):25-29

利用近５００年旱涝资料分析了干旱对山东省农业，工业及环境的危害。利用功率谱和模糊判别函数研究了旱涝的周期性和阶段性，指出旱涝的演变规律可为气候预测提供依据。  相似文献   

临汾无线遥测台网监控能力评述     

杨志刚 《山西地震》1992,(4)

根据吴开统等人提出的检验地震台网监测效能的几种方法,对临汾无线遥测台网的监控能力进行了检验,得出该遥测台网有较高观测精度的结论,找出了不足,提出了改进措施。  相似文献   

运城震群序列及其震相特征——华北地区遥测地震台网联网论文续四     

杨志刚  高兰玉 《地震地磁观测与研究》1993,(5)

利用临汾无线遥测地震台网的记录资料,探讨了运城震群活动的序列特征,对震群活动的震相记录特征进行了较全面的总结和分析.  相似文献   

ANALYSIS OF LOCATION CONDITIONS OF FINANCIAL CENTRES IN CHINA     

叶立梅  程志刚 《中国地理科学(英文版)》1993,3(4):297-307

First of all, the necessity of establishing financial centres is expounded. The establishment of financial centres has a lot of benefits to the world economic development, China's economy and the occupied cities. The location conditions of financial centres may be summarized as follows: the location of trade centre, the factors of geographical position, the circumstances of finance, etc.. We consider that the first batch of financial centres in China should be established in the eastern cities of China. So 9 eastern cities in China are chosen as the spare financial centres. According to the location conditions of financial centres, 12 indices are chosen and the method of synthetic weighted average is used to find the best locations of financial centres. The conclusions are that the grade A financial centres should be in Shanghai and the grade B should be in Tianjin and Guangzhou.  相似文献   

Dynamic stress concentration and scattering of SH-wave by interface elliptic cylindrical cavity     

陈志刚  刘殿魁  杨在林 《地震工程与工程振动(英文版)》2003,2(2):299-306

In this paper, the dynamic stress concentration and scattering of SH-waves by bi-naterial structures that possess an interface elliptic cavity are investigated. First, by using the complex function method, the Green‘s function is constructed. This yields the solution of the displacement field for an elastic half space with a semi-elliptic canyon impacted by an anti-plane harmonic line source loading on the horizontal surface. Then, the problem is divided into an upper and lower half space along the horizontal interface, regarded as a harmony model. In order to satisfythe integral continuity condition,the unknown anti-plane forces are applied to the interface. The integral equations with unknown forces can be established through the continuity condition, and after transformation, the algebraic equations are solved numerically. Finally, the distribution of the dynamic stress concentration factor (DSCF) around the elliptic cavity is given and the effect of different parameters on DSCF is discussed.  相似文献   

云南地区地震视应变时空演变与强震发震地区的对应关系   总被引：3，自引：0，他引：3  

张彬  杨选辉  易志刚  孙小龙 《中国地震》2006,22(4):364-372

在前人研究的基础上，利用云南及周边地区的地震资料，研究了1970年以来云南地区地震视应变场的分布和时空演化特征。结果表明，云南地区地震视应变的时空演变与强震具有较好的对应关系。在所研究的9个强震中，8个震前出现地震视应变异常区，5个发生在异常区内，3个发生在异常区附近。最后，对研究结果进行了初步论证。  相似文献   

Environmental Assessments of Trace Metals in Sediments from Dongting Lake, Central China   总被引：1，自引：0，他引：1  

姚志刚  鲍征宇高璞 《中国地质大学学报(英文版)》2006,17(4):50-319

INTRODUCTIONFresh water lakes are one of the planet’s mosti mportant freshwater resources.They support life invarious forms,develop tourism and provide uniquerecreational opportunities.It is also a good source ofthe provision of drinking-water for local communi-ties.Studies on trace elements in rivers,lakes,andsedi ments(Zhou et al.,2004;Gray et al.,2000;Grosheva et al.,2000;Klavins et al.,2000;Aucoinet al.,1999;Bortoli et al.,1998;Elbaz-Poulichet etal.,1996;Johansson et al.,1995;F r…  相似文献   

GPS-RTK技术在地籍测量中的应用研究   总被引：3，自引：0，他引：3  

胡志刚  花向红  韩红超  李振海 《测绘信息与工程》2007,32(5):46-48

将RTK技术应用于地籍测量中,分析了RTK在地籍控制测量和碎部测量的可行性,阐述了该技术应用于地籍测量中所遇到的问题并进行了深入研究,提出了相应对策.  相似文献   

中国城市固体废弃物甲烷排放研究   总被引：2，自引：0，他引：2  

高庆先  杜吴鹏  卢士庆  Zhang Zhigang  Zhang Enchen  Wu Jianguo  Ren Zhenhai 《气候变化研究进展》2007,3(Z1):70-74

The greenhouse effect of methane (CH4) is only inferior to that of carbon dioxide (CO2). As an important anthropogenic emission source, the calculation of the emission amount of CH4 from waste treatment in landfills plays an important role in compiling greenhouse gases inventory and in estimating the climate change effects caused by increasing of greenhouse gases. Based on the previous work, and according to the sampling and analysis on municipal solid waste (MSW) in typical cities, the degradable organic carbon (DOC) percentile was identified in typical cities in recent years. According to the IPCC greenhouse gases inventory guideline and default method of CH4 emission from MSW landfills, and in light of MSW managing situation in different regions, the amount of CH4 emission was calculated. The results show that the amount of CH4 emission decreases geographically from east to west and it increases temporally from 1994 to 2004 in China.  相似文献