And then different average velocity formulas of debris flows were studied , they all accord with the manning ' s formula . these corrected formulas are very accurate 對比了泥石流平均流速的各種公式,共同特點滿足曼寧公式,修正后的公式精度較高。
Considering these relationships , dozens of incipient motion conditions are united , and k of all kinds of formulas is otained commonly from 3 . 37 to 7 . 86 利用這些關(guān)系,將國內(nèi)外現(xiàn)有的幾十種泥沙起動條件進行了統(tǒng)一,可得各種公式的k值一般在3 . 37 ~ 7 . 86之間。
The main contents are as follows : firstly , the distinguishing feature of earth pressure in different lying way and the main calculation methods of the vertical earth pressure are analyzed and compared , the defect and applying limitation of earth calculation formula are pointed out . based on the elastic theory , formula to calculate vertical earth pressure on general trenching conduit is derived 其主要內(nèi)容包括以下幾個方面: 1 、對不同敷設(shè)方式的地下埋管的受力特點進行了分析,在此基礎(chǔ)上,介紹了上埋式管道垂直土壓力的幾種主要計算公式,指出了各種公式的局限性及其適用范圍,并以彈性理論為基礎(chǔ)推導(dǎo)了一般溝埋式管道垂直土壓力的近似計算公式。
The aim of this survey paper is to help the reader to navigate through the major developments of the literature and to incorporate recent theoretical research results with a particular focus on different formulations and interpretations of the gini index , its social welfare implication , and source and subgroup decomposition 因此,這個綜述的主要目的是幫助讀者在比較短的時間里了解基尼系數(shù)研究的主要發(fā)展線索和理論成果,包括基尼系數(shù)的各種公式及其解釋,基尼系數(shù)的社會福利涵義,以及基尼系數(shù)的收入來源和收入群體的分解。