The description and analysis of the case of "effect of the double funnel" offer the experience support to the above-mentioned hypothesizes.
对“双重漏斗效应”案例的描述和分析，提供了对上述假说的经验支持。
2
Combining the theoretical analysis and the existing experimental achievement, the important role of secondary flow for sediment ejection in sand funnel is researched for the first time.
根据理论分析和现有试验成果相结合的方法，研究了排沙漏斗中二次流在排沙中的重要作用。
3
Sensitivity analysis is done to the different results; the publication bias is evaluated by funnel plots and fail-safe number.