mixed-based number 中文意思是什麼
mixed-based number
解釋
混合基記數法-
Hust - caid ( computer aided industry design system developed by harbin university of science and technology ) is a parametric modeling design system based on feature. this system describes entities based on mixed model of boundary representation 、 csg tree and feature description tree ( fdt ), in which the design of solid model and feature - editing can be completed with rebuilding csg tree and feature description tree. but, in the feature modeling, with the number of features increasing, the design model becomes more and more complex. the efficiency of designing is decreased
Hust - caid （哈爾濱理工大學計算機輔助工業造型設計系統）是一種基於特徵的參數化造型設計系統。該系統在基於b - rep 、 csg樹和特徵描述樹（ fdt ）的混合模型基礎之上，利用重用csg樹與特徵描述樹的技術，來完成實體模型的設計與編輯工作。但在特徵造型過程中，隨著造型體數目的增加，設計模型將變得越來越復雜，由此導致了系統設計效率的降低。 -
Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。
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