In this paper, some characteristics of flow movement and sediment transport are analyzed by using the flume experiment data. the cross section of compound channel can be divided into four regions : the undisturbed region in main channel, the interactive region between channel and plain, the undisturbed region in flood plain and the boundary region. in the undisturbed regions, the distribution of longitudinal velocity along the depth has the feature of lograithmic. whereas, in the interactive region, the longitudinal velocity does not obey the logarithmic distribution law, but it can expressed as a revised logarithmic function by using a wake function. on the basis of the kinematic equation the velocity distribution of transverse velocity is obtained. in the boundary region, the longitudinal velocity obeys the law of parabolic distribution. furthermore, according to the simplified diffusion equation, the transverse distribution of sediment concentration in the interactive region is deduced. the analysis is in good agreement with the measured data
本文根據漫灘水流的運動特點,將漫灘水流的復式斷面分為主
槽平衡區、灘
槽交互區、灘地平衡區及邊壁區等4個區,並給出了各區寬度的經驗公式.根據灘
槽交互區垂線流速分佈的變化特點,提出了附加
尾流函數的對數流速分佈公式.在簡化水流運動方程和泥沙擴散方程的基礎上,對灘
槽交互區內垂線平均流速及含沙量沿橫向分佈進行了理論分析,提出了反映灘
槽水流動量交換強度的橫向渦量粘性系數及橫向擴散系數的表達式,得到了漫灘水流垂線平均流速及含沙量沿橫向分佈的解析解,並與實測資料吻合較好
A very low ring of the antenna has been demonstrated with measurement results
實際測試結果顯示,電阻加載漸變
槽線天線拖
尾脈沖的幅度非常低。
Inverse dovetail cutters and dovetail cutters with cylindrical shanks
直柄反燕
尾槽銑刀和直柄燕
尾槽銑刀
Inverse dovetail cutters and dovetail cutters with cylindrical shanks - technical specifications
直柄反燕
尾槽銑刀和直柄燕
尾槽銑刀技術條件
The tail gas absorption solution is returned to the crystallizer, thereby adjusting the liquid - solid ratio, and improving the phosphogypsum crystals with the entrained ammonium ions, with the result that the available components are recovered, and clean production and economic benefit are realized
同時,
尾氣吸收液返回結晶
槽一方面可以調節液固比,另一方面帶入的銨根離子可以改善磷石膏的結晶,既回收了有效成分,又實現了清潔生產與經濟效益雙豐收。
The reasons causing surface defects such as scab, rat tail, buckle and so on, and their prevention measures were described
摘要敘述結疤、鼠
尾、溝
槽等表面缺陷的產生原因及防止方法。
Just beyond the rear of chinzan - so is sekiguchi basho - an photo on left where the renowned haiku poet matsuo basho is said to have resided when he was involved in constructing the kanda - josui aqueduct
椿山莊後面便是關口芭蕉庵見左圖,據說著名俳句詩人松
尾芭蕉在參與修建神田上水渡
槽時曾住於此地。
The stern of river / sea barge is designed to the notch form to adapt the connected requirement between pusher and barge by couple - pins
摘要為適應推船與駁船間的二銷聯接方式,江海駁具有凹
槽尾型,船組的阻力與常規船舶有較大的差異。
Lathe this used for, plane level and take shape taxi lathe, to process narrow and long level, t word trough of part, swallow tail trough, etc. productivity high
本機床是用於刨平面和成形面的機床,對加工狹長零件的平面、 t字槽、燕尾槽等生產率更高。