mathematics in practice and theory 中文意思是什麼

mathematics in practice and theory 解釋
數學的實踐與認識
  • mathematics : n 數學。 ★通常作單數用，帶有「計算能力」意義時，作復數用，如： His mathematics are not good 他不...
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • practice : n 1 實行，實踐，實施；實際；實用；做法，技術。2 習慣，慣例，常規。3 練習，演習，實習，實驗；老練...
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • theory : n. 1. 理論，學理，原理。2. 學說，論說 （opp. hypothesis）。3. 推測，揣度。4. 〈口語〉見解，意見。
  1. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
  2. Quantizing the risk of mbo using the fuzzy mathematics theory, combined with the practice in china at the same time to understand, evaluate and take precautions against it as much as possible, is of great significance for smoothly carrying out the mbo in state - run small and medium - sized enterprises in china

    通過運用模糊數學理論把mbo的風險量化，同時結合我國的實際，盡可能地認識風險、評價風險和防範風險，對於我國順利開展國有中小企業的mbo會有重要的意義。
  3. A large quantity of theoreticians and practioners are now making theory innovations and practice testing in the field of financial mathematics

    現在，更是有大批的理論家與實踐者進行著金融數學的理論創新和實踐檢驗。
  4. Mathematics in practice and theory

    數學的實踐與認識
  5. Mathematics in practice and theory, 1994, : 26 - 31. 15 chen f l, deng j s, feng y y. algebaric surface blendingusing wu s method

    此外，用來拼接兩個或多個代數曲面的方法還有liming技術替換法基於理想的方法泛函樣條使用四次圓紋曲面等等。
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