排序方式： 共有2条查询结果，搜索用时 15 毫秒
1
1.
Knowledge of the equilibrium bed-concentration is vital to mathematical modeling of the river-bed deformation associated with
suspended load but previous investigations only dealt with the reference concentration of uniform sediment because of difficulties
in observation of the bed-concentration. This work is a first attempt to develop a theoretical formula for the equilibrium
bed-concentration of any fraction of nonuniform sediment defined at the bed-surface. The formula is based on a stochastic-mechanistic
model for the exchange of nonuniform sediment near the bed, and described as a function of incipient motion probability, non-ceasing
probability, pickup probability, and the ratio of the average single-step continuous motion time to static time. Comparison
of bed-concentration calculated from the proposed formula with the measured data showed satisfactory agreement, indicating
the present formula can be used for solving the differential equation goverming the motion of suspended load.
Project supported by the National Natural Science Foundation of China (Nos. 59779010 and 50079025) 相似文献
2.
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｑｕｉｌｉｂｒｉｕｍｂｅｄ ｃｏｎｃｅｎｔｒａｔｉｏｎ ,ａｓｔｈｅｂｅｄｂｏｕｎｄａｒｙｃｏｎｄｉｔｉｏｎｆｏｒｓｏｌｖｉｎｇｔｈｅｄｉｆｆｅｒｅｎ ｔｉａｌｅｑｕａｔｉｏｎｏｆｓｕｓｐｅｎｄｅｄｌｏａｄｉｓｖｉｔａｌｔｏｍａｔｈ ｅｍａｔｉｃａｌｍｏｄｅｌｉｎｇｏｆｓｅｄｉｍｅｎｔｔｒａｎｓｐｏｒｔ.Ｂｅ ｃａｕｓｅｏｆｄｉｆｆｉｃｕｌｔｉｅｓｉｎｍｅａｓｕｒｅｍｅｎｔｓｏｆｔｈｅｂｅｄｃｏｎｃｅｎｔｒａｔｉｏｎｉｎｔｈｅｆｉｅｌｄａｎｄｉｎｔｈｅｅｘｐｅｒｉｍｅｎ… 相似文献
1