等積多邊形 的英文怎麼說
中文拼音 [děngjīduōbiānxíng]
等積多邊形
英文
equivalent polygons-
Over the past two years, china has worked hard to boost the formation and development of the shanghai cooperation organization ( sco ), and continued to support and participate in the asean regional forum ( arf ), conference on interaction and confidence - building measures in asia ( cica ), council on security cooperation in the asia - pacific region ( cscap ), northeast asia cooperation dialogue ( neacd ) and other activities for multilateral security dialogue and cooperation, thus playing a positive role in deepening regional security cooperation with asian characteristics
兩年來，中國努力推動上海合作組織的形成與發展，繼續支持和參加東盟地區論壇（ arf ） 、亞洲相互協作與信任措施會議（ cica ） 、亞太安全合作理事會（ cscap ） 、東北亞合作對話會（ neacd ）等多邊安全對話與合作進程，為深化具有亞洲特色的區域安全合作發揮了積極作用。The numerical algorithm of solving the adjoint equations for different design cases have been developed by using finite volume methodology which is usually used to solve the flow governed equation. it includes the some important aspects, such as flux formulation, wall and far - field boundary treatment methodology, dissipative term formulation, etc. after the solution of the adjoint equations is obtained, the derivatives of the cost function with respect to all the design variables can be evaluated with the same operation. this can yields a significant saving over the other gradient - based techniques when there are many design variables
（ 3 ）進行了應用控制理論和三維歐拉方程的機翼氣動反設計研究，以及有升力約束情形下機翼跨音速減阻問題研究，分別推導了相應的共軛方程及邊界條件數學表達形式，研究與發展了三維共軛方程的有限體積數值求解方法，及相應梯度公式的數值求解方法，通過對計算網格生成、流場計算、共軛方程數值求解、梯度求解和優化演算法等多方面的有效結合，成功發展了三維機翼的氣動反設計和跨音速減阻優化設計程序，成功地進行了多個設計算例研究。An old theorem from the first half of the nineteenth century by lowry, wallace, bolyai and gerwien asserts that any simple polygon can be dissected into a finite number of pieces and put back together to form any other simple polygon of the same area
十九世紀上半葉lowry ， wallace ， bolyai與gerwien同時證明了一個古老的數學命題：任意給定平面上一個簡單多邊形，必可將其分劃成有限塊，重新安排，拼成另一個任意給定的等面積的簡單多邊形。Previous protocols for determining whether a point is inside a circle are not secure enough. we present a two - round protocol for computing the distance between two private points and develop a more efficient protocol for the point - circle inclusion problem based on the distance protocol. in comparison with previous solutions, our protocol not only is more secure but also reduces the number of communication rounds and the number of modular multiplications significantly
保護私有信息的計算幾何問題是一類特殊的安全多方計算問題， attalah等首先提出了安全多方計算幾何的概念，介紹了點的包含多邊形相交判定最近點對及凸包問題，並分別基於茫然傳送協議及置換協議設計了兩個不同的點積協議，在此基礎上提出了解決點在多邊形中的包含判定及兩個多邊形相交判定的初步方法，但正如作者所指出，其方法還不夠完善，協議效率有待進一步改進。This paper discusses the method of using rulers and compasses to average the polygonal areas by treating the dot on the bounder of a polygonal area as a beeline
摘要討論尺規方法均分多邊形面積，給出過多邊形邊界上一點作一直線將多邊形面積二等分的作法。In this thesis it was proposed to simulate the drawing, trimming, flanging by using error - adjustment method. the initial trimming lines would be adjusted and optimized in the computer by adjusting error. if the shape error between the flanging boundary line and the target is larger than prescribed, the redundant area is subtracted from the initial blank by some amount of volume along the deformation path, and the insufficient volumes are added to the initial blank by the same amount
本文提出，利用基於變形路徑的誤差修正法（ error - adjustment ） ，結合cae技術將對初始修邊線的調試過程在計算機中進行模擬（包括拉延、修邊、翻邊、整形等）計算，通過控制翻邊后零件成型邊界與實際目標輪廓之間的尺寸誤差來優化修邊線，如果初始切邊、翻邊后的輪廓與目標體的邊界存在較大偏差，則初始切邊輪廓中多餘部分單元將沿其變形路徑以相同體積量被切除，不足部分則沿其變形路徑以相同體積進行補償。The formulation for the error analysis of acoustic radiation problem calculated by the boundary point method ( bpm ) is put forward ; the physical explanation of the boundary point analysis of the acoustic radiation problem is given ; the influence of the particular solution on the calculation stability of the bpm is studied ; the etthanced volume source boundary point method ( evsbpm ) is presented ; a test for the effectiveness of the evsbpm is carried out on the aspects of its calculation precision, calculation speed, calculation stability, adaptation to the geometric shape of vibrating body as well as its ability to overcome the non - uniqueness problem through various examples with different boundary shapes and different boundary value distributions
第三章導出了邊界點方法分析振動聲輻射問題的誤差估計理論公式，揭示了邊界點方法分析振動聲輻射問題的物理本質；研究了特解場的局部特性對邊界點方法的數值穩定性的影響；改進了現有的特解場構造方法，提出了改進體積源邊界點方法；通過諸多不同邊界曲面和不同邊界量分佈的聲輻射算例，從計算精度、計算速度、計算穩定性、對振動體表面幾何形狀的適應性以及克服解的非唯一性等方面，對改進體積源邊界點方法的有效性進行了考證。Under some circumstances, we need to describe the geometry parameters of binary multi - target regions, such as the square, perimeter, minimal rectangle enveloping the target, and centroid
在進行多目標運動分析時，需要對二值化后的多目標區域面積、周長、外圍矩形邊界，與形心等參數進行特徵描述。分享友人