surface curve 中文意思是什麼

This paper put forward the optimized methods include reconstructing the characteristic curve by reasonable use of the adjust tools and analyse tools of the modeling software, admeasuring the automotive model surface correctly, simulating the breaking surface and creating the surface in the right turns which is good for modeling a smooth and exactitude surface. at last, after the correct analysis of the factors which are effect to the surface construction, a smooth and exactitude surface of the similar diamond concept car has been constructed by using the right optimize method

本文通過合理利用反求軟體中的造型工具和分析工具，正確劃分反求模型的造型區域，使用正確的曲面造型方法，對反求曲面的特徵網格線進行二次優化，並對突變曲面進行擬合再生成處理及建立合理的曲面生成順序等方法，最終獲得了仿型度和光順度都很高的反求曲面。

Based on the geometry characteristics of bertrand surfaces, the complicated surface conjugation issue can be discussed with their directrix line. according to the different generatrix line which can be divided into common plane curve, circular - arc curve and straight line, bertrand conjugation surfaces are parted into three typical types, and the basic equation and differential formula are established, then the conjugation conditions are found. aiming at the inclusive problem, the structure condition is given

論文將白川德共軛按母線為一般平面曲線、圓弧、直線分為三種典型類型，分別建立了共軛的基本方程與微分關系式，據此給出了各種類型的共軛基本條件，發現這是一類更強更嚴的條件，存在有相容問題，進而研究了白川德共軛的結構條件，至此確立了白川德共軛的基本框架。

According to the restriction of the generatrix line, bertrand surface can be constructed with the bertrand curve with broad sense group

按照母線的約束，形成廣義白川德曲線族，進而構造出白川德曲面。

The blending surface is itself a generalized canal surface, the spine curve of which is a ph pythagorean - hodograph curve

曲面拼接問題是計算機輔助幾何設計cagd計算機圖形學cg等領域中的一個重要問題。

Isometric algorithm for nurbs curve and surface and its application to nc machining

曲面的等距演算法及其在數控加工中的應用

Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources

基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。

The equations of workspace boundary surfaces for double - octahedron variable geometry truss pmts are derived based on surface analysis method. the projection and section curve grapha of workspace boundary surfaces for double - octahe

推導出了zrps ztps型及m 3tps型並聯機床運動學分析的一階和二階影響系數矩陣，得到了其運動學模型。

The aerodynamic design of curve of nozzle adopts perfect gas cresco method to calculate non - existence glutinous model surface, the correct boundary layer of the nozzle wall side adopts sivells - payre method, and the calculation of constringency part of the nozzle adopts stock formula

其中，噴管型面氣動設計採用理想氣體的cresci方法計算無粘型面;噴管的附面層修正採用sivells - payre方法;噴管收縮段的設計採用維托辛斯基公式。

The placid water swept round in a graceful curve, the rushes bent gently towards its surface.

平靜而茫茫的水面上，蘆葦輕拂，漾起縷縷漣漪。

In this paper, the finite - element numerical analysis calculation is applied to the foundation of high - rise and multi - floor building and the evolvement law of stress and displacement of tunnel used by urban traffic to explore the mutual influence between the wall rock of underground space and high - rise building foundation, taking account of the specific construction situation in the " sanmu garden " project in dadukou district in chongqing, from the perspective of underground space static - force structure stability analysis to open a underground tunnel with 6m in span and 7. 5m in height for track traffic 20m below the surface. this paper, taking considerations of three different states, i. e. the natural state without any artificial interference, the state of high - rise buildings on the surface, and the underground tunnel state with excavation for track traffic, and four plane lines and four vertical lines, analyzes and studies the distributing law of stress and displacement of calculation section from the following aspects : ( 1 ) the main stress vectorgraph, displacement distribution graph ( ux, uy ) and chromatogram graph of stress isoline ( 1, 2, xy ) of section under different states ; ( 2 ) the contrastive distribution curve of stress ( 1, 2, xy ) of different plane and vertical lines under the same state ; ( 3 ) the contrastive distribution curve of stress ( 1, 2, xy ) of the same plane and vertical lines under different states, wishing to provide references for underground space utilization and project designing and construction of the tunnel under high - rise buildings in the future

本文結合重慶市大渡口區「三木花園」開發建設項目，從地下空間靜力結構穩定性分析角度出發，針對在該項目中涉及的高層和多層建築物以及在其地下20米處開挖了一個用於軌道交通的跨度6米，高7 . 5米的地下隧道這一具體工程情況，採用2d - 3d -有限元結構分析程序對高層與多層建築物的地基基礎及其與城市軌道交通使用的地下隧道圍巖的應力與位移演變規律進行了有限元數值分析計算，探索了地下空間圍巖與高層或多層建築物地基基礎之間的相互影響，通過考慮未受到任何人為擾動影響的天然狀態、地表存在多層或高層建築物狀態和地下開挖用於軌道交通的地下隧道狀態等三種不同狀態以及4個水平剖線和4個垂直剖線等不同情況，從以下幾個方面具體分析研究了計算斷面的應力與位移分佈規律： （ 1 ）在各種不同狀態下計算斷面的主應力矢量圖、位移分布圖（ ux 、 uy ）以及應力等值線色譜圖（ _ 1 、 _ 2 、 _ （ xy ） ）等； （ 2 ）相同狀態下不同水平與垂直剖線的應力_ 1 、 _ 2和_ （ xy ）對比分佈曲線； （ 3 ）不同狀態下相同水平或垂直剖線的應力_ 1 、 _ 2和_ （ xy ）的對比分佈曲線等，為今後在對地下空間的開發利用以及在高層建築物地下開挖硐室時的工程設計和工程施工提供參考依據。

By this solution, a balde body model can be created by the optimization of the parametric grid of the blade body surface. some key techniques used in the solution, such as the computation of the data points on the meanline, the technology of cotinuty between the leading line and the outline of the blade body and the technology of the cross - section curve discretization, are disserated, and corresponding algorithm are presented in this paper

在進行參數網格優化的過程中，需要進行中弧線數據點求解、緣頭拼接和截面線離散，本文對以上三個問題進行了深入研究，並在此基礎上提出了中弧線數據點求解演算法，緣頭拼接演算法和截面線離散演算法等研究成果。

After studying a lot of documents of computer - graphics and computation of geometrical, based on nurbs, which is a pop expression to describe curve and surface, the author put forward a method ? ? to identify bad point by most excursion, to illustrate how to choose smooth base plane, which is not referred in most documents, and to introduce optimize method of operational research to combine surfaces, especially for surfaces combination with vertex, and improvement of combination effect

在解決多曲面有角點的拼接問題中引入了運籌學的優化方法，改善了多曲面拼接的效果，而且在ugii造型軟體的基礎上，用visualc + + 、 ug / openapi進行二次開發，加入了壞點剔除，曲線光順，曲面片之間的拼接等功能，很好的解決了反求工程中所遇到的問題。

By the help of geometric significance of plane or space curve and space surface, and by use of the symmetry of curve and surface to coordinate axis and coordinate surface, how to use the symmetry to calculate the surface integral and curve integral is discussed for the odd ( even ) functions that are defined on the curve or surface with symmetry

摘要藉助于（平面）空間曲線及空間曲面的直觀幾何意義，利用曲線、曲面關于坐標軸及坐標面的對稱性，探討了對于定義在具有對稱性的曲線、曲面上的奇（偶）函數，如何利用對稱性計算曲線積分及曲面積分。

The thesis tells surface analysis method including curvature analysis and curve depth analysis that we using in the skin restoring project. in chapter 2, it tells the definition of b - spline curve and surface and the fundamental algorithm - de boor algorithm for points of curve and surface. as to reconstruct surface from ct data, we discuss some basic algorithm and introduce the wrapping skin algorithm

在第二章中，介紹了b樣條曲線曲面的定義及基本演算法- -求曲線曲面點的德布爾演算法；基於ct數據的曲面重構，討論了重構過程中所應用到的基本演算法（如節點插入及消去演算法、曲線的反算方法等） ，並介紹了曲面重構中常用的蒙皮法。

The dissertation is summarized as follows : 1 ) b - spline curve fitting is studied. several curve fitting methods are disc ussed, and a method for b - spline curve fitting in the specified tolerance is pr esented. 2 ) b - spline surface fitting is studied

作者完成的主要工作如下： 1 ）研究了b樣條曲線擬合的問題，討論分析了數種常用的曲線擬合方法，並提出了一種給定允差下b樣條曲線擬合的方法。

Cutting pattern finding has three procedures : cutting lines obtainment, curve surface into plane and tension force release

對于裁剪線的確定，本章採用了曲面的最短線?測地線。

2. the bending status of curved surfaces is analyzed with differential geometrical theory and the concept curve of a surface is defined. as a result, the essential features of a developable surface are presented

2 、利用經典微分幾何學的理論對曲面在空間中的彎曲狀態進行了分析，定義了曲面彎曲的概念，指出了可展曲面的基本特徵。

Finally, when a 00, the limt situations for the developable modeling and surface development above are all disscussed and compared with those on bezier curve. the programs of the above methods und algorithms are developed, which shall be used in the system of developable surface modeling for cad / cam

Zier曲線上可展曲面造型方法和曲面展開演算法，均給出了當0時的極限，並與b ? zier曲線的情形作了分析和比較。這些方法和演算法均應用於實例在計算機上得以實現。

Equation of water surface curve along uniform distributing water trough of peripheral feed sedimentation basin

周邊進水沉澱池的沿程均勻配水槽水面曲線方程

Through studying the designed road surface curve and sink value, bottom stress and other aspects due to overloading, the paper found the effect of overloading to the road surface, and brought forward several reasonable suggestionsas follows : to optimize the road surface design, guarantee the compress degree of road surface, and to strengthen the management of overloading vehicles, etc

通過汽車超載對路面設計彎沉值、層底拉應力及其他方面的分析，論述了超載車輛對瀝青路面的影響及路面早期破壞的成因，提出在路面設計中應注意採用優化路面設計；在施工中應保證路面的壓實度，並應加大對超載車輛的治理力度。