束幾何 的英文怎麼說
中文拼音 [shùjīhé]
束幾何
英文
beam geometry-
Besides used as a tool for assisting in locating geometric elements during sketching stage, constrains is also a useful tool for convey design intents and knowledge during conceptional design stage
約束已經成為支持整個設計過程不可缺少的部分，它摘要浙江大學博士學位論文不僅在詳細設計階段用來表示幾何元素聯系和定位的信息，而且在概念設計階段是設計者表達設計意圖和知識的工具。It was begun, incidentally, by pierre varignon who sought to free dynamics from the encumbrance of geometry.
皮埃爾?伐里農在進行把動力學從幾何學的束縛下解放出來的探索中，順便開始了這個工作。Solving geometry constraints problems of point - plane configuration in euclidean space
實空間中點面構型幾何約束問題求解新方法Image coordinate and galvanometer pendular angle are kept in the computer according to the f9 field lens characteristic, enter pupil excursion and f6 characteristic error are ignored, that the image of laser scanning point move acceding to unlinearity relation is deduced theoretically. for deducing the distortion, error compensation is considered in the software
像點坐標與振鏡擺角按f物鏡特性的線性關系存儲在計算機，在忽略了入瞳漂移和f特性誤差后，從理論上推導出二維垂直振鏡分佈中激光束掃描點的像點按照復雜的非線性關系運動，為了減少幾何畸變，在軟體設計中給出誤差補償。Abstract : in this paper ， a ray - optics analysis is performed to investigate the asymmetry of dual beam scanning field produced by a rotating polygon. some basic equations of dual beam scan are derived ， such as ， the position vector for the incident point ， the scalar expression for reflected ray ， scan pattern on observation plane ect. the far - field asymmetry of the scanning field has been discussed
文摘:應用幾何光學理論研究了多光束轉鏡掃描場的非對稱性，導出多光束掃描入射點位置矢量、反射線標量表達式、觀察面上的掃描軌跡方程，並研究了掃描遠場的非對稱性。Through merging the dimension parameters into the data structure, the solutions to the constraints are solved using geometry organon
通過將尺寸參數融入數據結構之中，利用幾何推理法編程實現了對尺寸約束的求解。Optimal design with three variables is then done to the elbow - bar mechanism of the mp1040b moulding machine by utilizing the method of punishing function for constraint problems and variational scale for unconstraint problems. the optimal target function is the maxium of gradient in one work travel for the moulding plank of the elbow - bar mechanism. the result shows that the maximal gradient of moulding plank in one motion period declines by 25. 7 after optimization, and the angular acceleration of the bottom moulding plank decreases greatly
動力學分析中，各構件的質量和轉動慣量是通過pro / engineer軟體，先建立各個構件幾何模型而求得；然後，利用解決約束問題的罰函數法和處理無約束問題的變尺度法對mp1040b型模切機肘桿機構進行三個設計變量的優化設計，優化目標函數為肘桿機構的下模切板在一個工作行程中達到的最大傾斜程度；通過優化設計，模切機肘桿機構的下模切板在一個工作行程中的最大傾斜程度降低了25 . 7 ，其角加速度明顯減小，提高了模切機動力學性能。With regard to the restrains of geometries boundaries of the surface, we have finished the tooth contact analyses ( tca ) and precisely drawn the actual contacting area on the surface. the relations between the total length of the actual contacting lines and the rotating angle of worm gear are also revealed in this dissertation
為了獲得蝸輪輪齒齒面的準確描述，按共軛理論計算了蝸輪齒面的實際接武漢理工大學博士學位論文觸線，通過考慮蝸輪齒面的實際幾何約束，確定了蝸輪齒面的實際嚙合區，並運用數值方法精確計算了蝸輪齒面的邊界線。First, the nonlinear ls problem without constraint is converted to that subjected to inequality constraints by putting constraints on the do as of the received signals and toas of the first arrived signal with geometrically based single - bounce ( gbsb ) statistical channel model and cost - 207 model. then, a penalty function is used in the estimation of ms position
首先，用基於幾何結構的單次反射圓模型和cost - 207模型，對期望定位用戶的各條多徑信號的波達方向和最先到達多徑信號的時間進行約束，將傳統的解無約束的非線性最小二乘定位問題或近似線性最小二乘定位問題轉化為解不等式約束的非線性最小二乘定位問題；然後，用內點罰函數法估計移動臺的位置。By constructing the geometrical model of a certain underground single arm type pantograph and applying the translation of pantograph - head balancing bar and the perpendicular displacement of pantograph in the direction of the movement of locomotive while raising pantograph as the objective which must satisfy the demands of locomotive ' s stable current collection, this paper applied the multi - objective optimization based on the genetic algorithms to design the pantograph mechanism
摘要在建立某地鐵單臂受電弓簡化幾何模型的基礎上，根據列車平穩受流對受電弓提出的各項要求，以受電弓升弓時機車前進方向上的縱向偏移量和弓頭平衡桿的平動為目標，以受電弓正常升弓所需升弓轉矩等為約束，運用基於遺傳演算法的多目標優化技術，對該型受電弓機構進行了優化，得到了使受電弓運動性能達到最優的幾何參數。Broad beam geometry
寬束幾何條件It is very important to handle the constraints in parametric design for clothing patterns
摘要在服裝紙樣參數化設計中，對其幾何元素的約束處理是非常關鍵的。To solve the inaccuracy problem caused by the two existing methods ( average end - area method and prismoidal method ) used for the calculation of roadway earthwork volume, this paper puts forward a new concept of the 3 - dimensional algorithm that takes all the roadway geometric design procedures as a kind of geometrical operation between the ground model ( original terrain model ) and the roadway model ( designed model ) under certain constraints, and then presents a complete 3 - dimensional algorithm of roadway earthwork volume as well as its executable computer program. the algorithm benefits from the re - triangulation technique of constrained delaunay triangulation ( cdt ), which can yield a true volume value theoretically. through a number of practical tests covering varied intervals between adjacent cross sections, it is proven to possess a higher accuracy compared with that of traditional methods. all the work involved in this paper indicates that the 3 - dimensional calculation of roadway earthwork volume is feasible, more accurate and should have further application in practice
針對目前廣泛使用的道路土方量計算方法平均斷面法和稜柱體法計算不準確的缺點，提出了三維土方量計算演算法的概念.該演算法以帶約束的狄羅尼三角化（ cdt ）為技術核心，認為所有道路幾何設計過程都是地面模型和道路（設計）模型進行幾何運算的結果.基於此，本文設計出相應的演算法步驟，同時完成了相應的軟體開發，使得該三維演算法能和傳統的方法進行對比.此外，結合工程實例，採用了不同的道路橫斷面間距對三維計算方法和傳統方法的誤差進行比較、分析.結果證明三維演算法具有更好的精度，該演算法可用於道路、場地平整等工程土方量計算The laser power is detected through the pd ’ s movement across the faculous region. when the value of the peak value of laser power is got, the power of the facular boundary points can be found according to definition of the facular boundary such as “ 1 / e ~ 2 ” theory. then the equation of the facular boundary can be made fitting by using the least square method, and calculate the beam divergence at last
採用兩個光電探測器分別檢測光束不同高度上的兩個光斑，在確定光斑中心最大光強值后，根據光斑截面尺寸的1 / e2定義，得到光斑截面邊界點的光強值，並以其為標準判定光斑截面的邊界點，對探測到的邊界點通過最小二乘法進行擬合，得到橢圓光斑截面的方程，根據空間幾何關系求出發散角。A integrated algorithm of ambiguity resolution is proposed. by using triple carrier phase, integer gauss transformations, qr factorization, cholesky factorization, and geometry constraint, the correlation between ambiguity components is reduced, and more error ambiguity can be discarded, also process of ambiguity searching getting rapidly. the ratio test combining constraint of baseline is used to fix ambiguity rapidly
利用三差最小二乘求解模糊度浮點解，然後採用整數高斯變換降低模糊度分量間的相關性，再根據qr分解和基線幾何約束減少需搜索的模糊度組合，採用cholesky分解在搜索過程中及早淘汰不正確的模糊度組合，最後利用ratio檢驗與基線幾何約束條件相結合檢驗模糊度組合，盡快固定正確的模糊度。A polynomial time algorithm in positive define geometric programming with constraints
約束正定式幾何規劃的一種多項式時間演算法According to the dual theory, a simple geometric programming was proposed to derive a corresponding geometric dual problem instead of cross - entropy optimization problem with cross - entropy constrains, which is a concave programming one with linear constrains, leading to a simpler calculation
根據對偶理論，提出了一個簡單的幾何規劃，該方法把一個帶有叉熵約束的叉熵優化問題轉化成了一個對偶規劃，而對偶規劃是一個只需要解決一個帶有線性約束的凸規劃問題，比較容易計算。Besides geometry information design solution includes product functional requirements, engineering constraints, design experiences and rules and so on
除了幾何信息以外，設計結果還包括產品功能需求、工程約束、設計經驗和規則等。Based on huygens - fresnel diffraction integral theory, the propagation properties of bessel beam were studied in this paper. by using the analyses of geometrical optics, hollow beam are found and the formula of the starting point 、 the end point and the bottle length can be got
論文中，我們基於惠更斯-菲涅耳衍射積分理論研究了由軸棱錐產生的貝塞爾光束的傳輸特性，並且通過幾何光學解析無衍射光束的聚焦特性。On the basis of theories of physics, geometrical optics and photometry, the optical properties of collimated light beam incident upon single fiber perpendicular to the fiber axis are studied. by exploring the behaviors of reflected light and transmitted light from single fiber, the distribution of the light is described and the proportionalities between the intensity of the reflected, transmitted and scatered light are obtained respectively, and the different laws governing the intensity of diffused light and transmitted light from single fiber between near and far field are discussed. experiments demonstrate that the decrease of projecting light in far field is in direct proportion for the increase of fiber diameter, which serves as the theoretical basis for a series optics equations, as well as for the designment for photoelectric deviccs for detecting fibers
結合物理學的基本原理和幾何光學的基本規律以及光度學的基礎理論等三方面，研究了單纖維在平行均勻光束垂軸入射時的光學性質.分析了單纖維反光和透光的特徵，光強分佈及反射光、透射光和散射光的相對大小;討論了在近場和遠場條件下，漫反射光和透射光光強的不同規律;通過實驗驗證了遠場時，纖維的漫射光強度與纖維直徑成正比的關系分享友人