validity direction 中文意思是什麼
validity direction
解釋
有效性方向-
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 -
Originating airport name, taf validity period, wind direction speed gust, visibility, weather, cloud, icing, turbulence, significant change of weather elements, maximum and minimum temperature
發出預報的機場名稱taf有效期風向風速陣風能見度天氣雲層結冰情況湍流天氣要素的顯著轉變最高及最底溫度。 -
Linear singular vector represents the direction that initial errors increase fastest during the validity period of tlm. lsvs can be used to construct initial errors in an ensemble prediction system
對于某一給定的范數，在所考慮的時間段內，線性奇異向量代表初始誤差線性增長最快的方向。 -
In our research, variation of contour line is used for describing the characteristics of image structure. using teacher images and machine learning method, an image direction classification model is built as a decision tree. test results argued the validity of this method
本課題使用圖像輪廓線向量特徵來反映圖像的構圖特徵，通過教師實例獲得用戶的方向分類概念，然後利用決策樹的學習建立分類模型，並且在此分類模型的基礎上實現了一個圖像正立方向判別系統。 -
Testing the standard error of horizontal direction with a equi - spaced scale and processing the tested data with the method of relitive adjustment, we obtain that the testing error of leveling angle is less than one third of the error of leveling angle, which testifies the validity and feasibility of the method
摘要針對全站儀精度，採用等間隔標尺檢測的方法測定水平方向標準差，用相關參數平差的方法對檢測數據進行處理，求取全站儀水平測角精度，得到水平角測定誤差小於水平角誤差的三分之一，實驗證明該方法的正確性和可行性。 -
It designates the principles and measures on assets recombination of public company in the future and its development direction after china joining wto. chapter six studies assets recombination performance of traffic public company, points performance concept of company assets recombination, that is the fulfill degree of motivation of the company assets recombination and the validity of the development. establish performance assessment index by delphi method
第6章對交通上市公司資產重組績效進行了研究，提出了企業資產重組的績效概念，即企業資產重組動因的實現程度及企業未來發展的有效性，並用專家調查法建立起了一套對企業資產重組績效綜合評價的指標體系，最後建立了常權和變權綜合評價模型。
分享友人