較好的糙石 的英文怎麼說
中文拼音 [jiàohǎodecāodàn]
較好的糙石
英文
coarse stone-
The yellow river water environment information management system is a computer network system covering the whole basin, the construction of which includes a computer network construction and software development. the software involves database, gis, and man - machine interface. the investment in the system is huge and the period of construction is long, thus, a good design is very important. the design schemes are summarized in this paper. according to the present computer technology, some new methods used in network design and software development are introduced, and it is suggested that expandability and opening of the system should be considered in system construction
黃石?水電站輸水渠道地處地質結構比較復雜的地方，由於渠道建成投運的時間較早，且原設計的標準較低，糙率較大.在電站機組已更新改造的情況下，若不進行輸水渠道挖潛改造，已難于滿足電站機組的設計流量要求.經反復比較，決定採取減小渠道糙率的方案，對輸水渠道進行三面光護面加固防滲，增加過流，效果很好Abstract : in light of thicker grain and smaller viscosity of debris flow, a segmented simulation of the debris flow with flume is presented. for the first time. more difficult resistance similarity is brought about by geometric rate without excessive coarsing and discontinuous similarity of sand grain composition in model is eliminated with different grain scale. on this basis the density similarity and sand conveying similarity are achived. the method presented is verified through a model test case
文摘:針對水石流顆粒粗，粘性小的特點，提出了利用水槽進行分段模擬水石流的設想，首次通過幾何變率解決難度較大的阻力相似問題，改變了以往過度加糙的方式;通過變粒徑比尺的方法消除了模型沙級配不連續相似的問題，較好地實現了固體物質級配相似，達到了泥石流的密度相似和輸沙相似.通過水槽概化模型試驗實例，對本方法進行了驗證
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