曲線鄰域 的英文怎麼說

中文拼音 [qūxiànlīnyù]
曲線鄰域 英文
neighborhood of a curve
  • 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...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 域 : 名詞（在一定疆界內的地方; 疆域） land within certain boundaries; territory; region
  • 曲線 : [數學] curve; bight; bought; profile; net曲線板 french curve; irregular curve; curve board; splin...
  1. A normal transform is introduced, and there are enough much grids in the region between the critical layer and the wall, where the variation of the disturbance is the quickest. the finite - difference of governing equations with fourth - order accuracy in the normal direction is utilized in full regions including points close the wall, and is very important for accurately discreting equations. the combination of global and local methods is implemented, and a new iterative formula is derived

    對于曲線坐標系下的拋物化穩定性方程，文中發展了求解的高效數值方法:引進法向變換，使得在臨界層與壁面之間的擾動量變化最快的區域有更多的法向網格點;導出包含邊界鄰域在內的完全四階精度的法向有限差分格式，這對方程精確離散至關重要;採用全局法和局部法相結合的方法及其新的迭代公式，大大加速收斂並得到更精確的特徵值。
  2. Based on the computer geometrical models of straight bevel gears built, a iso - parametric tool path algorithms which was fit for the machining of multiple surfaces has been designed. the algorithms can solve the problems which exist in machining multiple non - rectangle parameter surfaces and avoid the calculation of sufaces intersection

    在建立直齒圓錐齒輪計算機模型的基礎上，提出了適于多曲面加工的等參數線刀軌生成演算法，避免了在對多張相鄰非矩形參數域齒面進行加工時所產生的干涉問題，而且曲面無需求交，使得計算成本下降。
  3. To fulfill the need of the application of rp technique in medical domain, reverse cad modeling from medical cross sections is systematically studied in this dissertation. firstly, some algorithms related to the research of this dissertation are studied. new algorithms for orientation and inclusion test for simple polygon, an error constrained automatic faring algorithm for b - spline curve and a theorem regarding the termination criterion for subdivision of triangular bezier patch are proposed

    本文針對rp技術在醫學領域應用的需要，系統研究了基於醫學斷層輪廓數據的反求cad建模理論和方法： （ 1 ）在基礎演算法研究部分，提出了簡單多邊形方向及點在多邊形內外判斷的新方法、三角b zier曲面片離散的誤差控制定理和一種帶誤差約束的b樣條曲線的自動光順方法； （ 2 ）提出了一種基於相鄰層輪廓相似性的醫學斷層輪廓數據曲面重構方法； （ 3 ）提出了一種稱為「虛擬測量」的曲面模型處理方法。
  4. The ecological study of macrofauna was conducted on four typical sampling stations selected in the northern muddy bottom area of jiaozhou bay, estuary of dagu river, culturing and nearby area in hangdao in mar., jun., aug. and dec., 2002. abundance and biomass of macrofauna were investigated by quantitative study. the macrobenthic community structure and biodiversity were analyzed through multivariate statistic analysis

    本研究分別在膠州灣北部軟底區、大沽河口、黃島養殖區及養殖區鄰域選取四個典型站位，於2002年3月、 6月、 8月和12月野外采樣，對大型底棲動物進行了定量研究，採用多元統計方法分析了群落結構和生物多樣性，探討了底棲生物群落與環境因子的關系；用豐度和生物量比較曲線法分析大型底棲生物群落對自然和人為擾動產生的響應。
  5. In this dissertation, the research trends for the problem have been introduced ; the ‘ dim ’ and ‘ point ’ has been strictly defined in mathematics from machine vision and human vision ; the ideal clutter suppression system based on clutter predication and the realization and evaluation of evaluation index has been studied, in succession the clutter suppression technologies have been researched. firstly, the classic nonparametric algorithm has been analyzed in detail and systematically, for it ’ s weakness that it cannot remove the non - stationary clutter ideally, kalman filter algorithm for clutter suppression in 2d image signal has been built. secondly, fast adaptive kalman filter is presented based on fast wide - sense stationary areas partition algorithm : limited combination and division algorithm based on quarti - tree algorithm, new taxis filter route algorithm which can break through the limitation of the necessity of pixel neighborhood of 2d filter and laplace data model with two parameters which is perfectly suitable for the residual image of kalman clutter suppression

    首先分析了經典的非參數法，對於四種具有代表性的核，從前述的三個性能評價方面做了分析和對比，指出了其速度快的優點和對非平穩圖像適應性差的弱點，針對非參數法的弱點，重點研究了對非平穩圖像適應良好的卡爾曼雜波抑制技術:建立了非平穩圖像的類自回歸模型，在此基礎上建立了二維卡爾曼濾波基礎的兩個方程:狀態方程和測量方程;建立了非平穩圖像準平穩區域快速劃分演算法:基於四叉樹法的有限分裂合併演算法;二維空間的基於k排序的濾波路線演算法，突破了空域濾波路線上區域相鄰的限制;在這些研究的基礎上實現了快速卡爾曼估計，實驗驗證了該方法相對逐點卡爾曼估計可以提高運算速度三倍左右;雜波抑制結果表明傳統的高斯性檢驗並不適合卡爾曼估計后的殘余圖像，由此建立了殘余圖像的雙參數拉普拉斯模型，實驗表明其可以完好的吻合殘余圖像的概率密度曲線。
  6. It has a total sea area of about 1, 650 km2 and its indented coastline is about 800 kmlong. in the west, hong kong is located near the pearl river estuary - while in the east hong kong faces the open ocean of the south china sea

    香港位於中國南岸，海域總面積約為1 ， 650平方公里，曲折的海岸線長約800公里。香港西面毗鄰珠江三角洲，東臨遼闊的南中國海。香港海洋生物分佈廣泛，品種頗多樣化。
  7. For every point on contour curves, the support area and support radius were first calculated based on actual distance of adjacent pixels, end points were obtained with linear interpolation technique ; next, the distance between point and its centroid of support area was used as feature strength to determine feature points candidate ; finally, those points with local maximum feature strength were selected as vertices of polygonal

    摘要首先基於相鄰像素間的歐氏距離計算出輪廓曲線上每一點的支持區域及支持半徑，用線性插值得到支持區域的端點；然後求得支持區域的質心，以曲線上的點和其相應的支持區域質心之間的距離作為特徵響應篩選出候選特徵點；最後將具有局部極大特徵強度的點作為多邊形的頂點。
  8. We based on the analyse to main drill core of the area and adjacent, start with area stratum, set up microfacies type and identify characters of the area, make certain the types of facies and microfacies, and establish the mode of well logging microfacies. through synthetical contrast and analyze the layers and sand body of in pi formation of 316 wells, using well logging curves to partition and get 8 layers : pi1 - pi7, in them p12 is thick formation, can be divided into p12a and p12b layers

    從區域地層、構造、沉積背景入手，以研究區和鄰區的重點取芯井巖芯分析為基礎，建立研究區沉積微相類型及識別特徵，確定各小層亞相和微相類型，建立相應測井微相模式，依據研究區316口井的測井曲線資料將目的層pi組油層分為八個小層： p11 p17 ，其中p12層為厚油層，又可分p12a和p12b兩個小層。
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