The data forecasted by network experiment data and data computed by classical regression model are compared and analysed from the comprehensive angel of sediment incipient motion theory and ann theory 最后從泥沙起動輸移理論和神經(jīng)網(wǎng)絡理論的綜合角度,分析比較網(wǎng)絡預測值和實測值、傳統(tǒng)模型回歸計算值。
First , total resistance is derived by summing different resistance components . the relationship between resistance of still plane bed and energy slope has been proposed from the similarity between sediment incipient motion and still bed resistance . and this relationship can be used in computing grain resistance 一是從不同的床面阻力單元出發(fā),利用泥沙起動與定床阻力之間的相似性研究了靜平整床面的阻力,建立了靜平整床面阻力與能坡之間的關系式,并將此式用于沙粒阻力的計算。
In this dissertation , on the basis of comprehensive review of the study achievements on sediment transport , we get the fact that most of formula in sediment incipient motion and bed - load transport rate are established by classical regression analysis model , i . e . firstly establishing the formula according to related sediment transport theory , secondly computation for regression coefficients in formula by using field or laboratory experiment data 故本文在回顧并總結泥沙輸移研究成果的基礎上,指出大多數(shù)泥沙起動公式和輸沙率公式的推求是采用傳統(tǒng)回歸模型,即先根據(jù)輸沙理論定出計算公式,再用實測資料或試驗數(shù)據(jù)率定公式系數(shù)。
The main contents are as follows : section - of theory of sediment transportation - on the basis of comprehensive review of the study achievements on sediment transport , pros and cons in using classical regression model based on lms during establishing formula in sediment incipient motion and bed - load transport rate ; experiment data in non - uniform sediment with a wide distribution in flume experiment of stead sediment transportation are been collected and coordinated 本文的主要內(nèi)容包括:泥沙輸移理論部分:對前人的相關泥沙起動輸移研究結果總結性的回顧,分析了采用最小二乘法的傳統(tǒng)回歸模型在泥沙起動公式和輸沙率公式處理中的四川大學碩士學位論文人工神經(jīng)網(wǎng)絡理論及其在泥沙科學中的應用研究優(yōu)點和缺點:收集并整理了兩組平衡狀態(tài)下的輸沙試驗資料。