現有曲面 的英文怎麼說

中文拼音 [xiànyǒuqūmiàn]
現有曲面 英文
existing surface
  • 現 : Ⅰ名詞1 （現在; 此刻） present; now; current; existing 2 （現款） cash; ready money Ⅱ副詞（臨時; ...
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 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...
  • 現有 : now available; existing
  1. Computer aided geometric design, 1989, 6 : 323 - 358. 7 seidel h p. symmetric recursive algorithms for surfaces : b - patches and the de boor algorithm for polynomials over triangles

    2三角b樣條曲面的曲率分佈具有「節點線」現象，也就是說在其曲率在三角面片的邊界上有「聚集」現象。
  2. ( 2 ) the causation that the caustic phenomena of electromagnetic wave propagation in two - dimension concave reflectors occurs and the types of singularities in caustic fields are investigated, and the conclusion that there are two types of singularities ( fold and cusp ) in caustic fields in two - dimension concave reflectors is obtained ; by symplectic geometrical method, formulations of computing wave fields in and far away from caustic fields in two - dimension concave reflectors are deduced, and the results are plotted in pictures. ( 3 ) the cause of the caustic phenomena of electromagnetic wave propagation in three - dimension concave reflectors and the types of singularities in caustic fields is discussed, and the conclusion that there are three main types of singularities ( fold, cusp and swallowtail ) in caustic fields in three - dimension concave reflectors is obtained ; by symplectic geometrical method, the formulae of computing wave fields in and far away from caustic fields in three - dimension concave reflectors are deduced. particularly, the wave fields in ellipsoid concave reflector are computed, and the results displayed in special sections are given

    論文主要包括三個方面： （ 1 ）分析了凹面反射的焦散現象，給出了不同凹面反射的焦散圖； （ 2 ）分析了二維凹面反射波動場焦散現象產生的原因及焦散區奇性的種類，得出了二維凹面反射波動場焦散區奇性主要有折疊（ fold ）和尖點（ cusp ）兩種的結論，利用辛幾何方法構造了圓錐曲面反射波動場非焦散區和焦散區的通用計算公式，並給出了圓柱面、橢圓柱面及雙曲柱面反射的計算結果； （ 3 ）分析了三維凹面反射波動場焦散現象產生的原因及焦散區奇性的種類，得出了三維凹面反射波動場焦散區奇性主要有折疊（ fom 、尖點kusp和燕尾k ）三種的結論，提出了利用辛幾何方法計算三維凹面反射波動場非焦散區和焦散區的計算方法，並給出了三軸不等橢球體凹面反射波動場的計算結果剖面圖。
  3. Using the normal and neighbor relationship, classification of scattered data points is realized according to the quadric surface. the typical algorithms of surface reconstruction from 3d scattered data points are introduced, and then we discuss the current surface tessellation algorithms about their adaptive range, low efficiency

    本文首先對三維散亂數據點重構曲面的典型演算法和現有的曲面網格劃分演算法進行了分類與比較，針對現有的散亂點曲面重建演算法存在的低效率和局限性問題提出了相應的解決方案。
  4. The information in existence is collected and the traditional theatric buildings of zhejiang were investigated on the spot, so as to comprehend them once more, the development process of traditional theatric buildings was summarized in the article. the influence between traditional theatric buildings and traditional drama, religion and human environment, and architectural characterization of zhejiang traditional theatric buildings was dissertated in the article. additionally, as a theatric building, its acoustical characterization is important, so the acoustical condition of the traditional theatric buildings was analyzed in the article

    論文旨在通過對現有資料的收集，以及對浙江古戲場的現場調研，重新認識中國傳統戲場，敘述了傳統戲場的發展沿革，戲場建築文化與傳統戲曲、宗教、人文文化的關系淵源，以及浙江傳統戲場的建築空間與裝飾特色，再者，戲場作為觀演建築，其聲學狀況也是十分重要的一個方面，本文從觀（聽眾區）與演（舞臺）兩方面，對傳統戲場的聲學狀況進行了分析闡述。
  5. In this thesis, the surface reconstruction for unorganized points, and the design and implementation of the system for constructing the finite element mesh

    本文主要在基於散亂點的三維重建演算法，曲面有限元網格自動生成工具系統的設計和實現等方面進行了研究和探討。
  6. This thesis gives a brief account of the basic theories of software engineering and computer graphics, of the data structure of individual component modeling, of the design of the software structure and of the method of realizing software. meanwhile, this thesis put more emphasis on the exploration of the arithmetic of the delaunay triangle network, nurbs curve integration, the filling - in arithmetic of triple - tree, and the arithmetic based on the scan - line arithmetic and the filling - in of complex section

    文章介紹了關于軟體工程學與計算機圖形學的基本理論及其各組件模型的數據結構、軟體結構設計與軟體實現的技術方法，並重點討論了基於約束條件的delaunay三角網格化演算法、 nurbs （非均勻有理b樣條）曲面擬合、三叉樹等值線填充演算法和基於掃描線的復雜剖面填充演算法。
  7. Firstly, by improving the existing light - cylinder model based highlight - line method for surface interrogation, a new method, named light - strip model based highlight - line method, is proposed. it overcame the disadvantages of the existing one

    給出了改進的曲面品質檢查高亮線方法，用光片模型取代光柱模型，解決了現有高亮線方法存在的檢查結果與基準光線相關的問題。
  8. China has a vast population and a broad market, thus liquor consumption owns a considerably potential market in china. however, due to the intence yet disorder competition of the present market, the marketing of the liquor industry in china has fallen into an rather awkward dilemma. the hidden trouble, the lurking danger, cause the businessmen in this line unable to extricate themselves from a low - leveled ricious competitive cycle. such severe challenge also confronts yuechitequ company. therefore, the most urgent problems waiting for resdring lie in how to take advantage of the present resoures effectively, how to distinguish the market situation, and how to institute a scientific product - popularizing programme in order to keep the enterprise standing undefeated in the intense competition, and develop the enterprise rapidly, favorably. this thesis makes a thoughtful analysis about the external conditions of market and internal ones resources in the yuechitequ by means of inrestication through questionaire and scientific data processing. in the second part, with the application of stp system theory of marketing and new - product - pricing theory, it designs and further expounds the popularization of the new products of this company, then forms a excutable performance and makes a constant rerision via market practice. in this way can it explor a suitable road to popularize the products in the liquor market, help the enterprise to free from the difficulties and progress healthely, consitently

    本文通過在岳池特曲公司現有產品市場進行問卷調查，運用科學的數據處理方法對所回收的658份問卷統計分析，以及利用美國哈佛大學商學院著名教授邁克爾?波特（ michaelporter ）提出的五種力量模型和價值鏈與vrio分析理論，對白酒市場的公開數據細致分析，以明確四川省岳池特曲酒業有限公司實施新產品市場推廣所面臨的市場條件和內部資源條件，在此基礎上，本文運用市場營銷學中stp系統理論、新產品定價理論等，對岳池特曲公司推出的白酒新產品進行市場細分、確定目標市場和市場定位，並根據市場營銷4p理論制定新產品的產品策略、價格策略、渠道策略、市場促銷推廣策略，形成最終整體完善的可執行方案，再通過市場實踐對推廣方案進行檢驗、修正，力圖在酒類市場中探索一條新產品市場推廣的適用道路，並幫助企業擺脫困境、邁開步伐、持續健康的發展。
  9. In the past decade, a lot of new work had been proposed to overcome the limitations of nurbs, such as triangular nurbs, t - spline, g - spline, rational gauss surface, and so on

    為克服nurbs的缺點，十年來，先後出現了很多新的設計方法，如三角域nurbs 、 t樣條、 g樣條和有理高斯曲面等。
  10. First, the author introduces some present product data models including wire frame model, surface model, solid model, and feature model, and some related product data exchange standards including iges, pddi, pdes, and step. the characteristics and shortages of the product data models and the product data exchange standards are analyzed in general

    本文首先介紹了當前現有的產品數據模型，包括線框、曲面、實體和特徵模型，及相關的產品數據交換標準，包括iges 、 pdes 、 pddi和step ，分析了它們各自的特點和不足之處。
  11. On the basis of the study of the theory and appraise method on land use in the small towns from home and abroad, this paper at first conducts a deep study on the development and role of the small towns, indicating that its development has sawn an uneven development phrase and becomes a carrier of the enterprises, a pool of surplus laborers, a hub of material exchanges between the rural and urban areas, a base of spiritual civilization, an important way to achieve urbanization. second, it conducts a study on the situation and features and the problems the land use, indicating that the efficiency of the land use is low, which has a direct influence on the development of agriculture and the role of the small towns. and the study of the demand of the land indicates the shortage of land is serious, and the small town must rationally use the land and increases its intensive role and the economical efficiency to meet the demand

    在分析國內外已有關于小城鎮土地利用的理論與評價方法的基礎上，首先對小城鎮在我國的發展、地位和作用進行了深入的分析，判明我國小城鎮發展經歷了一個曲折向上的發展階段，已成為鄉鎮企業的載體，農村剩餘勞動力的蓄水池，城鄉物資交流的樞紐，農村精神文明的基地，是我國城市化的重要途徑；其次，對小城鎮土地資源利用現狀和特徵進行了探討，並對發展小城鎮建設導致的土地利用問題進行了剖析，表明目前我國大多數小城鎮土地效益和規模效益低下，佔用耕地過多，直接影響農業的發展，影響小城鎮的地位和作用；通過小城鎮土地供需分析研究表明，我國土地短缺十分嚴峻，小城鎮土地需求缺口較大，小城鎮必須合理利用現有土地，增強集約功能和土地經濟效益，從而緩解需求壓力；最後，論文通過運用特爾菲法，描述統計分析法、多元統計分析（主成分分析）法和系統分析法中的層次分析法（ ahp ）等一系列方法，結合定性和定量兩方面，從土地質量、土地資源數量與結構、土地經濟效益、環境效益、社會效益等五個方面進行分析，篩選、建立了土地資源利用評價指標體系，在因子評價的基礎上，建立了土地利用綜合評價模型，並給出了評價過程和方法。
  12. As the largest coal mining machinery manufacturer, the chinacoal zhangjiakou coal mining machinery co., ltd. mainly produces flexible afc and related compatible bridge stage loader, crusher, matilda unit and plough used underground, consisting totally 500 sizes, 82 series and 10 categories

    公司作為我國最大的煤礦專用設備製造企業，主要產品是煤礦井下採煤工作面用可彎曲刮板輸送機及其配套的橋式轉載機、破碎機、皮帶機自移機尾、轉載機自移裝置、刨煤機等，現有產品10大類82個系列約500多個規格。
  13. With energy method, we can conveniently control the precision of the objective surface and add boundary constraints for preserving the model ' s global geometric continuity, but this method is very time - consuming. stiffness adjustment is the easiest method to be implemented and the fairing result is always satisfying except that the acquired surface editing is awkward. based on wavelets decomposition, the surface model ' s data size can be compressed efficiently and this method is running fast, however, the error and boundary constraints are difficult to be considered

    其中基於能量原理的光順方法能夠方便地控制目標曲面的精度和邊界條件，從而能夠實現曲面模型的全局連續性，但是能量法的運算速度還有待提高；剛度調整法實現簡單，但是生成的曲面的可編輯性較差；小波分解方法計算速度很快，能夠有效地實現數據壓縮，但是其逼近誤差和邊界條件卻難于控制。
  14. In this paper, the author primarily introduces how elliptic curves have been applied to public key cryptography from algebra and number theory, analyzes the advantage and security of ecc. the work the author has done is : ( 1 ) study the arithmetic of ecc on the encryption / decryption, digital signature and key exchange schemes and analyze their security performance ; ( 2 ) propose a new id - based group signature with existed id - based digital signature and discuss its application in digital cash ; ( 3 ) realize the electronic auction system and key authentication system with ecc

    作者所作的主要工作有： （ 1 ）研究了基於大素數域上的橢圓曲線密碼在加密解密、密鑰交換、數字簽名等方面的密碼協議並分析了每種協議的安全性能； （ 2 ）在現有基於身份的數字簽名方案的基礎上提出了基於身份的群簽名系統並討論了群簽名在數字現金中的應用； （ 3 ）給出了橢圓曲線密碼在電子拍賣系統、密鑰認證系統方面的實現方案。
  15. In the existing curves and surfaces formulations, a shape is designed by moving the control points of curves or surfaces

    摘要在現有的曲線曲面設計中，曲線曲面的形狀是通過控制頂點或數據點來確定的。
  16. Nurbs surfaces with single interior knots are simple and used widely. the thesis main aims at biuquartic, biquintic, k x fc - degree b - spline surfaces and bicubic nurbs with single interior knots. one of the contributions is to apply knot refinement and the geometric continuous conditions of bezier surfaces to deduce the geometric continuous constraints of nurbs patches and obtain the intrinsic equations of common boundary curves, where the intrinsic equations are the special phenomena of nurbs surfaces

    節點向量是內部單節點的nurbs曲面是最簡單也是最常用的，本文重點針對單節點的雙四次、雙五次和雙k次b樣條曲面及雙三次nurbs曲面，運用節點插入技術和b zier曲面的幾何連續理論成果，導出了它們之間的幾何光滑拼接條件，同時得到了公共邊界曲線所必須滿足的本徵方程，其中本徵方程是nurbs曲面所獨有的現象。
  17. We use bezier - shaped displacement reference curves to determine the new position of the vertices on the deforming surfaces. the proposed approach is fast and robust, and can support real - time interactive mesh editing and handle arbitrary meshes thanks to re - sampling and subdivision operations

    這種變形方法計算快速便捷，可以方便地集成到現有曲面造型系統中，結合重新采樣以及曲面細分等技術，這種曲面造型方法可以應用在任意拓撲結構的網格曲面編浙江大學碩士學位論文摘要輯上。
  18. The author ' s work gives new way, which is beneficial to real time interaction and can efficiently reduce computing time as well as data storage amount. these algorithms can find good use in numerical machining, robotics, form - position tolerance and computer graphics. ( 3 ) degree reduction for nurbs curves and surfaces by applying the theory of the best uniform approximation of chebyshev polynomials and the explicit matrix representation of nurbs curves, this thesis centers on the research of the explicit nearly best approximation of multi - degree reduction of nurbs curves

    以上關于等距曲線的幾何逼近與代數逼近的演算法改革了當前國際圖形界只能對基曲線沿法矢方向平移定距離的點作近似逼近的固定模式，創造了利於交互操作，能有效地減少計算量及數據存儲量的新方法，可在數控加工、浙江大學碩士學位論文機器人、形位公差學、計算機圖形學中獲得很好的應用（ 3 ） nurbs曲線曲面降階應用nurbs曲線的顯式矩陣表示及chebyshev多項式逼近理論，以實現nurbs曲線顯式一次性降多階的近似最佳逼近為目標進行了研究
  19. After the orderly reduction methods of massive scattered data being studied, this paper proposes a partial tangent plane slicing method and a virtual second - scan line method after giving a new k - nearest algorithm to re - organize the massive data. the new proposed methods of data reduction and grey theory based unusual noisy data process can be used to generate the scan line type data and it can be directly used to reconstruct curves and surfaces. the research lays a good foundation for reconstructing the cad model in a point - line - surface manner

    4 .深入研究了海量散亂數據的有序簡化技術，在提出建立海量數據點鄰接關系k -鄰近新的演算法基礎上，提出了局部切平面切片法和虛擬二次掃描線法，實現了海量數據的有序重組，通過基於灰理論的數據簡化和異常點處理新方法，生成可用於直接重構曲線曲面的掃描線類型數據，為以點?線?面方式重構cad模型打下了良好的基礎。
  20. These ideas, published in a research paper in 1998, built on the discovery that certain mathematical quantities known as knot invariants were associated with the quantum physics of a two - dimensional surface evolving in time

    傅利曼的想法奠基於一項數學發現：某些屬于結不變量的數學量，和二維曲面隨著時間而演變的量子物理有關。
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