lofting 中文意思是什麼

lofting 解釋
n. 名詞 1. 放樣；理論模線的繪制。
2. 【軍事】上仰轟炸〈投彈后飛機迅速爬升以避免受震波影響〉。

  1. Then a high - degree geometric continuity blending surface is obtained with transfinite interpolate method. ( e ) g3 blending surface with approximation can be constructed by lofting if geometric invariant errors are given, the surface can be converted to b - spline, nurbs form for the purpose of system aggregation

    最後，為滿足曲面造型系統集成的需要，在保證曲率、曲率導數和撓率精度情況下，將上述研究結果應用於曲面放樣逼近方法，得到參數過渡曲面轉換成b樣條曲面或nurbs曲面的形式。
  2. Based on a systematic discussion on the contents, characteristics and the up - to - now accomplishments of these three operations in cagd, we present our researches in three ways as follows : ( 1 ) efficient evaluation for parametric curves and surfaces based on generalized ball bases based on the generalization of mathematical model of surface lofting program in the consurf system, two generalized ball surfaces and the recursive algorithms for evaluating them are given. furthermore, the conversion algorithms from bezier form of a surface to these two generalized ball forms are presented

    在系統地論述cagd中此三類運算的內容、特點、已有研究成果的基礎上，就以下三方面給出了研究成果： （ 1 ）基於廣義ball基的參數曲線曲面快速求值以前英國航空公司consurf系統機身模線程序數學模型的推廣為基礎，定義了兩類廣義ball基曲面，給出了求值的遞推演算法，推導了b zier曲面到這兩類曲面的轉換演算法
  3. Fitting of curve based on the ship lofting

    基於船體放樣的曲線的擬合
  4. Application of computer technology in lofting of steel structure pieces

    鐵塔聯接板自動放樣及圖形參數的標注
  5. Requirements of ship hull lofting

    艦船船體放樣要求
  6. Application of autocad and total station apparatus in polar coordinates lofting

    及全站儀在極坐標法放樣中的應用
  7. In the part of 3d modeling, some theories and technologies was discussed. then, how to build 3d terrain was analysis. this dissertation presented two new methods of terrain building : lofting based on contour and random terrain building based on fractional brown motion

    三維地形是虛擬環境的基本要素，本文總結了各種地形建模方法，提出了兩種地形建模方法：根據等高線地圖生成地形的「沿截面法線放樣法」和生成隨機地形的分形曲面法。
  8. Considering the central line lofting of road in mountain area with varied topography, the paper suggests a more convenient curve draught method called the casual position to set up instrument, and deduces the formulas for lofting points

    摘要文章針對在地形復雜的山區放樣道路中線時，提出採用隨意按置儀器法（以下簡稱隨意置儀法）測設曲線更為有利，並推導出放樣點坐標計算公式。
  9. Abstract : in this paper, we develop a lofting method for railway tunnel profile including straight way and curve way, analyse carefully the error resources of lofting, and move an amendment one by one, precision analysis to the amended lofting formula shows that the lofting precision is up to scheduled standard

    文摘:提出了鐵路隧道斷面（包括直道、彎道和坡度）的放樣掃描方法，詳細分析了放樣掃描的誤差來源，並逐一給出了修正方案，對修正後的放樣公式作了精度分析，放樣精度達到了預定的要求。
  10. With the knowledge of mathematical fairing and fairing procedure, we divide and classify ship data first ; then we design the database, give the tables " structure ; after the analyzing and designing of the system, we develop " ship lofting cad / cam system " with visual c + + using odbc technology. the interface of the system is friendly to users

    在對船體型線光順演算法和光順過程的充分研究的基礎上，我們首先對船體數據進行分類整理；然後進行數據庫設計，給出各種表結構；最後對系統功能進行分析設計，以visualc + +為開發工具，應用微軟的開放數據庫互連技術實現了「船體放樣cad cam系統」 。
  11. In part 1 of this dissertation, we discuss ship lofting and database technology, as well as their application. it is necessary using database technology to build a ship lofting system

    本文第一部分討論了數學放樣理論和數據庫技術在造船中的應用現狀，認為有必要用數據庫解決方案來解決大量曲線數據的存取問題。
  12. The advantages, such as easily computing form - lines and accurately lofting, are offered by mathematical ship - hull surface. hull structure modeling, engineering analyzing and manufacturing are based on mathematical ship - hull surface. furthermore, hull structure designing in virtual reality environment and intelligent building depend heavily on the ship - hull surface model

    船體曲面的數學描述有著很大的優越性，如放樣精確，求值（型線、肋骨線、結構線、接縫線等）方便，也是後面船體結構設計，工程分析，建造的依據，是實現智能設計、虛擬建造的先決條件。
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