微机在中文地质文献检索中的应用     

张东南  冯有利  苗雪红  袁西平  梅重丰 《河南国土资源》1994,(3)

本文介绍了国际上先进的ＣＤＳ／ＩＳＩＳ文献管理软件及其与“中文地质文献库”的接口试验。作者在中国地质矿产信息研究院中文地质文献库的基础上，建立了河南省地矿厅的中文地质文献库，成功地将微机应用于中文地质文献检索中。利用微机进行文献检索可大大提高文献检索的查准率和检索速度。  相似文献   

Initial design of urban drainage systems for extreme rainfall events using intensity–duration–area (IDA) curves and Chicago design storms (CDS)     

Dan Rosbjerg  Henrik Madsen 《水文科学杂志》2013,58(12):1397-1403

ABSTRACT

Due to more frequent extreme rainfall incidents in recent years, many large cities are considering the construction of new drainage systems to cope with rainfall in the order of 100-year events. In such cases, T-year point rainfall events should be supplemented with areal reduction factors (ARF) to avoid overdesign. To facilitate an initial design, a procedure based on using Chicago Design Storms (CDS) in combination with intensity–duration–area (IDA) curves was developed to produce CDS-ARF input rainfall. By means of the time of concentration, a specific instantaneous unit hydrograph (IUH) was obtained for each subcatchment. Combination of CDS-ARF rains and the subcatchment IUHs using convolution integrals was used to produce inflow hydrographs to the drainage system. A sequential design procedure that successively includes subcatchments for the entire drainage system in the downstream direction is implemented and exemplified ensuring a consistent initial design.  相似文献