時距曲面 的英文怎麼說

中文拼音 [shíjùqūmiàn]
時距曲面 英文
reflection-time surface
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 距 : Ⅰ名詞1 （距離） distance 2 （雄雞、雉等的腿的後面突出像腳趾的部分） spur （of a cock etc ）Ⅱ動詞...
  • 曲 : 曲名詞1 （一種韻文形式） qu a type of verse for singing which emerged in the southern song and ji...
  • 面 : Ⅰ名詞1 （頭的前部; 臉） face 2 （物體的表面） surface; top 3 （外露的一層或正面） outside; the ri...
  1. Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. the subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows : ( 1 ) considering the effects of the finite length of primary core, one - dimension analytical solution for the air gap field is cited in this paper. based on it, the single layer winding magnetic field is studied. considering whole - pitched and short - pitched winding configuration with odd poles and half - fulled slots in both ends, the double - layer winding magnetic field is analyzed, respectively

    本文對大圓環直線感應電機進行了深入細致研究，內容包括： （ 1 ）本文採用有限長行波面電流作用於有限長鐵芯上的模型，引用了氣隙磁場一維解，研究了單層繞組磁場，奇數極半填槽雙層繞組在採用整距和短距時磁場的分析、比較，簡單介紹了二維解； （ 2 ）用有限元軟體ansoft對大圓環直線感應電機空載氣隙磁場進行了靜態分析，並分析了結果； （ 3 ）用軟體進行了額定電壓下的瞬態分析，得到了轉矩，位移，轉速隨時間變化曲線圖，利用單極性霍爾元件測定轉速並與軟體計算結果進行了比較，採用等效電路法計算了堵轉時的最大電磁力並做實驗進行了驗證，由實驗測得了三相電流波形，並與計算結果進行了比較，對其不對稱性進行了定性分析。
  2. In accordance with the occurrence behavior of roof strata and the fracture characteristics of key stratum in shallow seam longwall mining, studied post - buckling behavior of roof key stratum in the process of mining by using initial post - buckling theory, which derived a critical load and a breaking span of the main roof during the first weighting, determined the final subsidence and the maximum rotation angle for broken key stratum, and presented an application with the example of daliuta 1203 face

    摘要根據淺埋煤層頂板巖層的賦存特點和長壁開采時關鍵層的變形破斷特徵，應用初始后屈曲理論探討了開采過程中頂板關鍵層的后屈曲性態，得出了老頂初次來壓時頂板的臨界載荷和破斷步距，確定了頂板破斷后的極限下沉量和回轉角，並以神東礦區大柳塔1203工作面為例給出了工程實例。
  3. In some time - critical situation, continuous ssi is computation bottleneck of some solid modeling system. conventional approach for solving continuous ssi often uses intersection algorithm iteratively without taking the characteristic of the surface into account to simplify computation. the dissertation analyzes the intersect curve structure of continue surface, from the point of intersect curve ' s evolution, it describes the relationship between topology of offset surface intersect curve and topology transmit point ( ttp )

    等距曲面和運動曲面在cad cam領域中有著重要的應用，在一些時間敏感場合例如數控加工動態模擬，等距曲面和運動曲面等連續變化曲面求交運算已成為這些系統的計算瓶頸，連續變化曲面求交問題的通常解法是採用曲面求交演算法反復迭代計算交線，沒有考慮連續變化曲面交線之間的相似性進行求交簡化，效率上一直不能有很大的提高。
  4. In practice, it ’ s very hard to find any ideal scatter points to track, so this thesis focuses on the motion compensation algorithm base on motion parameters estimation, which is used in r - d fft imaging algorithm and verified by simulation. work of this thesis contains : first analyze the signal - processing model of isar system in detail, and establish a 3 - dimensional mathematical scattering model of moving target. then some improvements are made on existing compensation algorithm, to get a higher image quality and reduce compute burden

    本論文有以下幾點創新: 1 .在距離向的補償（包絡對齊）方面，採用基準相關法代替相鄰相關法或積累相關法，一定程度上解決了可能出現的包絡漂移和包絡突跳現象;根據目標運動軌跡特點，採用二次曲線擬合的方法，將包絡對齊時的局部誤差轉化為全局的誤差，以便實現較優的整體對齊效果。
  5. Because the intervals of two side girders are relatively large in the structure of the floor, it is not even and some and out of shape that its bridge of panels must be produced at the same time horizontally and crookedly and vertically except deforming wholly, level analyse can receive the satisfied result already at this moment, is it is it accord with floor structure real work state, girder of cable - stay bridge just to analyse with whole out of shape relevant non - linear space of function while being out of shape while being above - mentioned to consider only, but about this research rarely seen to report bridge worker is it understand their receive strength characteristic in an all - round way to need badly publicly

    由於肋板結構中兩個邊主梁的間距較大，其橋面板除整體受力變形外必然同時產生橫向彎曲和縱向不均勻局部變形，此時平面分析已不能得到滿意的結果，只有考慮上述變形與整體變形相關作用的非線性空間分析才符合肋板結構主梁斜拉橋的實際工作狀況，但有關這方面的研究鮮見公開報道，橋梁工作者急需全面了解其受力特性。
  6. Through approximating the deformation space by using curve and surface offset techniques, we obtain a unified space deformation model. thus the sampling problem is solve naturally at the same time, we provide a unified kernel for the implementation of different space deformation models

    通過對曲線、曲面控制變形中的變形空間進行等距逼近的方法，我們實現了一個一維、二維、三維控制手段的統一空間變形模型，這種統一不但自然地解決了曲線、曲面控制變形中的采樣問題，同時為實現各種空間變形提供了一個統一的數學模型。
  7. Based on the principle of inclined offset surface, the calculation and generation of nc cutter location for small divided area of blade were introduced. in addition the computer simulation and the path chart of cutter center were given to prove the tool path

    在每一段曲面上，基於斜等距曲面的原理，推導出葉片分段側銑加工時刀位軌跡的生成和計算；並用計算機模擬和刀心軌跡圖對刀位進行了驗證。
  8. But this method can ’ t be used to generate tool - path for the kind of surfaces whose curvature varies sharply, since singularity may appear when creating the offset surface. it is computation expensive to resolve the singularity

    但曲率變化大的曲面在生成等距面時發生自交，曲面的自交處理計算復雜，降低了基於等距面的刀具軌跡計算速度。
  9. Second, change the diaphragm ’ s space between, retain the other thing, analyze the influence of the stress and deformation of box ? girder cross section and the beam web. based on the analysis upwards, the writer studied the rule of the influence of the stress and deformation box ? girder cross section and the beam web with different diaphragm ’ s space between. according to the results of finite element analysis, the writer puts forward some suggestions which will provide some reference for the following design

    本文利用ansys有限元分析程序，對指定斷面，不同曲率的曲箱梁，建立完備的有限元模型，分別對二個方面的問題進行了分析:其一，通過對箱梁在有無跨中橫隔板時截面頂板及腹板的變形和應力分佈的對比分析，闡述了設置跨中橫隔板的重要性;其二，在相同工況下，通過改變橫隔板的設置間距，分析對箱梁翼緣及腹板的受力影響。
  10. The general idea behind the second one is approximation. the control mesh is subdivided until the error between the control vertices and corresponding subdivision surface is less than a given threshold. then the vertices substitute those points on the surface approximately. the last step is to calculate offset point for every vertex and connect them to form an offset surface

    第二種演算法採用逼近思想，首先通過對控制網格進行細分，當控制頂點和細分曲面的距離滿足一定誤差要求時，近似用控制頂點代替細分曲面上的點，然後對各個頂點分別求等距點。
  11. These kinds of ? tronger ? algorithms do not need to retrieve correspondence and branching problems. the contour - spreading algorithm is proposed to calculate distance field quickly within the complexity 0 ( n ). the intermediate surface is generated by linear approximation, while in conventional methods, it is tiled between a designated layer of contours and the original lower slice or upper slice of contours

    和傳統方法比較，它們生成的曲面都是精確通過采樣點，但是對于中間曲面的生成（在有分枝問題和對應問題時）方式不同，傳統方式是指定中間層的位置，在中間層按一定方式生成一個輪廓線，然後分別與上下層進行曲面鑲嵌，而基於距離場技術的方法則是通過線性插值的方式來產生中間曲面。
  12. In this paper, in order to estimate coal storage volume in open stockyard, we have analyzed the optical triangulation and applied it to the measurement of large surface we have stated the measuring theory of distance with laser and the measuring theory of angle. we have also analyzed main factors influencing measurement precision and studied several key techniques in large - scale measuring such as the problem of non uniformly distributed of distance measuring resolution in large surface measurement, the methods of locating laser spot center and so on

    本文通過對火力發電廠露天煤場存煤量的自動檢測系統的研究，深入分析了光學三角測量方法的原理，並將其應用於大型曲面測量；闡述了激光測距原理和角度測量原理；對大型曲面測量的實現方法、畸變光斑圖像的幾何中心的準確定位等幾個方面的關鍵技術進行了探討；分析了大范圍測量時影響測量精度的主要因素。
  13. The precise of velocity analysis is controlled by the approximation formulas of moveout curve and the analysis method

    決定速度分析的精度的主要方面有時距曲線擬合公式的精度和速度分析的具體實現步驟。
  14. I consider the distance factor and combine the shannon entropy theory to educe the distance entropy function, then use it as the insert calculation function. the distance entropy function make a good terrain surface fitting effect and extend the application field of entropy theory as well as the calculation method of curved surface fitting

    通過考慮距離因素，並結合香農熵理論，得出基於距離熵的曲面插值函數，將其用於地表曲面擬合，取得良好的擬合效果，拓寬了熵的應用與研究范圍，同時也拓展了用於曲面擬合的數值計算方法。
  15. The solution regards the original given interface ( original curve or interface ) as one zero set of function, transferring the some phenomena such as topology to lever set function in higher dimension, and getting moving interface of original interface at different time through resolving the level set function

    水平集方法是把最初給定的截面（原始曲線或面）看作是某個函數零集，把求解等距過程中發生的拓撲等現象轉移到高一維的水平集函數中去，通過求解該水平集函數以得到原始截面不同時刻的等距面。
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