offset curve 中文意思是什麼
offset curve
解釋
曲線移動-
Finally, the convexity - concavity of the closed curve is detected. in the end, choi ' s pair - wise offset of polygon algorithm is improv ed based on the proposed curve intersection algorithm
文章最後完善了choi多邊形等距偏移演算法，並把本文提出的封閉曲線求交方法應用其中，用於自交點的確定。 -
( 2 ) offset approximation for bezier curves the problem of parametric speed approximation of a curve is raised. the author points out that the crux of offset curve approximation lies in the approximation of parametric speed
（ 2 ）等距曲線逼近（ offset ）提出了曲線參數速度逼近問題，指出等距曲線逼近問題的關鍵在於參數速度的逼近 -
The parametric speed of the curve is firstly approximated by the bezier polynomial which takes the lengths of control polygon ' s edges of the direction curve of normal as bezier coordinates. then the corresponding geometric offset approximation algorithm is given. moreover, an offset approximation with high precision is obtained by degree elevation of the direction curve of normal
首先利用以法矢方向曲線的控制多邊形邊長為b zier縱標的b zier多項式來逼近曲線的參數速度，給出了相應的幾何等距逼近演算法，進一步結合法矢方向曲線的升階獲得了高精度逼近 -
After giving the legendre polynomials approximation to parametric speed of the curve, the author gives the jacobi polynomials approximation to parametric speed with endpoints interpolation. from this, two algebraic offset approximation algorithms, which preserve the direction of normal, are derived
給出了曲線參數速度的legendre多項式逼近，進一步給出了參數速度的插值區間端點的jacobi多項式逼近，由此導出了保持法矢平移方向的兩個等距代數有理逼近演算法 -
In some time - critical situation, continuous ssi is computation bottleneck of some solid modeling system. conventional approach for solving continuous ssi often uses intersection algorithm iteratively without taking the characteristic of the surface into account to simplify computation. the dissertation analyzes the intersect curve structure of continue surface, from the point of intersect curve ' s evolution, it describes the relationship between topology of offset surface intersect curve and topology transmit point ( ttp )
等距曲面和運動曲面在cad cam領域中有著重要的應用，在一些時間敏感場合例如數控加工動態模擬，等距曲面和運動曲面等連續變化曲面求交運算已成為這些系統的計算瓶頸，連續變化曲面求交問題的通常解法是採用曲面求交演算法反復迭代計算交線，沒有考慮連續變化曲面交線之間的相似性進行求交簡化，效率上一直不能有很大的提高。 -
Setting out circular curve with the offset of arbitrary direction line method
任意方向線支距法測設圓曲線 -
This paper will discuss how we can revise the offset by curve matching so that the sensor price will fall and its accuracy will be improved
本論文應用曲線擬合方法校正零點，降低成本且精確度提高。 -
This paper will discuss how we can revise the offset by curve matching, the algorithm of the neural network and the normalized method of the polynomial match so that the sensor price will fall and its accuracy will be improved
本論文應用曲線擬合方法，神經網路演算法和多項式擬合的規范化方法校正零點，降低成本且精確度提高。 -
Through approximating the deformation space by using curve and surface offset techniques, we obtain a unified space deformation model. thus the sampling problem is solve naturally at the same time, we provide a unified kernel for the implementation of different space deformation models
通過對曲線、曲面控制變形中的變形空間進行等距逼近的方法，我們實現了一個一維、二維、三維控制手段的統一空間變形模型，這種統一不但自然地解決了曲線、曲面控制變形中的采樣問題，同時為實現各種空間變形提供了一個統一的數學模型。 -
To interpolate the given ship offset data, the ship - hull surface is represented successfully by nurbs. the boundary conditions computation and knots vector construction are detailed in nurbs curve and surface interpolation
本文根據船體型值表的數據，用nurbs曲面來描述完整船體曲面，對插值曲面邊界條件構造及節點矢量計算進行了研究，實現了船體曲線曲面的nurbs表達。 -
In the last part of the article applications of space cubic ph to sweep surface modeling and pipe surface modeling are introduced, and sufficient criteria that guarantee that the offset of a sweeping surface are generated by the offset curves of the profile curve is investigated
最後，本文介紹了空間三次ph曲線在掃曲面和管道面造型方面的應用，並研究了一掃曲面的等距面為該掃曲面輪廓線的等距線所生成的充分條件。 -
It presents algorithms to extract the similarity of intersect curve in different offset distance and use ttp to label the topology of surface intersect. the algorithms succeed in combination of tracing method and topology information, and present an optimized offset ssi algorithm. the optimized algorithm pre - processes surfaces to achieve ttp, and decides calculation strategy of starting points by analyzing the properties of ttp on the surface
本文通過對等距曲面交線結構進行了大量的分析，從交線的形成和演化過程，揭示了等距曲面的交線拓撲結構和曲面上特徵點之間存在著本質的聯系，提取等距曲面不同offset距離交線環的相關性，並使用特徵點來標識交線環的拓撲信息，成功地將拓撲信息和跟蹤法相結合，設計了一種等距曲面求交優化演算法。 -
The software can design many conventional type of cam, concluding cam - plate with middle follower, cam - plate with offset follower, cylindrical cam, dividing cylindrical cam, and cylindrical cam with space curve, etc. in forming working curves of cam - plate, used the approximation by arcs which can lessen the nodal points on curves of cam uttermostly in same error, so it reduce the computation time and relieve the chattering of principal axis. in former times, to cam mechanism, the follower only has one direction motion
本軟體可以設計的凸輪類型較多，包括了對心移動從動件盤形凸輪、偏置移動從動件盤形凸輪、圓柱凸輪、圓柱分度凸輪和空間曲線柱形凸輪等，其中對盤形凸輪的工作曲線採用了難度較大的圓弧逼近演算法和等誤差演算法，這樣就可以在相同的允許誤差內最大限度的減少生成曲線的節點數，減少計算時間，同時可以大大減輕加工中的振動現象。 -
According the topology of intersect curve, it dynamically adjust the local tracing strategy to reduce the ssi computation time. it can overcome the degenerate conditions such as loop leaking and singularities. based on offset ssi algorithm, the dissertation pay emphases on motional ssi problem
演算法通過在曲面交線拓撲信息的指導下，確定交線分支初始點的求取策略，根據交線環拓撲結構，動態調整交線環的局部搜索策略，從而提高了交線環求解的演化效率。 -
As the basic concept, the first step is to modeling by ug. there is different model between propeller and commonly hardware, so we must be use curve modeling, at the same time, characteristic modeling and entity modeling in the whole process. first, we apply offset data for spline fit curve, then scanner smooth curve face
首先在三維繪圖軟體ug中對螺旋槳及葉片進行三維建模，由於螺旋槳的造型不同於一般零件的cad造型，故在造型過程中同時採用了曲面造型，特徵造型和實體造型幾種方法，先由型值數據生成樣條曲線，再由樣條曲線掃掠生成平滑的曲面，最後通過圓整?延伸得到螺旋槳的三維模型。 -
Next, a three - span curve continuous box beam has been studied by fem, and how to set the single - pedestal pier in curve continuous box beams has been discussed. when setting the single - pedestal pier, the vehicle flow should be inspected firstly, and then a best offset distance should be selected within the feasible range of the offset distance. meanwhile, increase the spacing interval of the double supports to the largest extent when installing a double supports on a sharing single - pedestal pier, which can enhance the stability and security of the bridge as a whole
對上石立交橋中一座三跨連續的曲線箱梁進行有限元分析，詳細地討論了在曲線箱梁中如何合理設置獨柱墩的問題，分析表明獨柱墩的設置應該根據車流調查的實際情況，再結合結構本身的特徵，在可行的偏距范圍內選擇一個最佳的偏距，另在對公共墩上的雙支座進行設置的時候應該盡量使雙支座的間距增大，這樣可以保證橋梁整體的穩定性和安全性。 -
As error of the curve was not random, we made error curve to offset the measurement
由於特性曲線的殘差具有一定的規律性，做出殘差曲線來作為補償應用於實際測量中。 -
Based on analysis of synchronization techniques in ofdm, this dissertation present a ml arithmetic to estimate time and frequency offset using symmetrical & conjugate prefix. the correlation peak of likelihood function curve is very sharp according this arithmetic, so the symbol synchronization by this arithmetic is exacter than that by general arithmetic using cycle prefix
文中在全面分析ofdm同步技術的基礎上，提出了利用對稱共軛前綴的最大似然估計法來進行符號定時和頻偏估計，相對于傳統的利用循環前綴的最大似然演算法，這里提出的演算法可以獲得尖銳的相關圖樣，定時精度高，頻偏估計誤差小。
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