pointed shell 中文意思是什麼
pointed shell
解釋
尖頂殼體-
In this thesis, the basal theory of the nuclear structure were firstly and systemically described, the background and the application of the liquid - drop model, feimi - gas model, shell model and collective movement model were meticulously concluded and summarized. on the one hand, we not only pointed out their success, as well as their important effects on developing the nuclear theory and setting up the integrated nuclear theory system, but also pointed out their deficiencies
本文首先對原子核結構的基本理論進行了系統的描述，對液滴模型、費米氣體模型、殼模型、集體模型等的背景以及它們的應用作了細致而又簡明的歸納和總結，一方面指出了這些模型的成功之處，以及這些模型在發展原子核理論並建立完整的原子核理論體系中的重要作用，同時也指出了它們的局限性。 -
From the viewpoint of the characteristics of two - phase liquid sand slurry wear, combined with the examination and study on easily damaged workpieces, the wear failure ' s basic rules are pointed out, of the pump shell and the cutter - piece on service, and the general principles of material wear - resistant designs put forward. the sand slurry abrasion tester has been designed and developed which can simulate general dredging conditions. summarized and presented are the position - exchange measuring method of sand slurry abrasion test and the experiment specification of sand slurry wear test of dredging conditions
文中系統論述了作者在疏浚工況泥沙磨損機理及其耐磨新材料課題研究中的工作成果，主要研究內容和創新點如下：總結分析了磨損研究動態和提高材料耐磨性的方法；從兩相流泥沙磨損的特點出發，結合對失效易損件的考察研究，分析指出了現役泥泵殼和絞刀片磨損失效的基本規律，提出了材料耐磨損設計的基本思想；設計研製了能模擬疏浚工況的泥沙磨損試驗機，總結提出了泥沙磨損試驗換位測試法和疏浚工況泥沙磨損試驗規范。
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