節點矢量 的英文怎麼說

中文拼音 [jiédiǎnshǐliáng]
節點矢量 英文
knot vector
  • 節 : 節構詞成分。
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 矢 : Ⅰ名詞1. （箭） arrow 2. （尿） excrement; dung; feces 3. （姓氏） a surname Ⅱ動詞（發誓） vow; swear
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  • 節點 : [電學] panel point; hybrid; packing; node; nodal points; joint of framework; pitch point; point pitch
  1. Experiments show that the efficient motion estimation algorithm proposed can further reduce block matching distortion computations relative to conventional fast motion estimation algorithms with neglectable coding efficiency loss ( within 0. 1db )

    提出一種基於節點模型的可變形塊匹配運動估計演算法來搜索最佳運動矢量。實驗表明，在編碼性能損失很小的條件下，可以使得運動搜索塊匹配的運算量在通常快速運動搜索演算法的基礎上下降61 % 。
  2. Thereby, a single candidate at the final - level search is enough to provide the desired performance. as a result, the algorithm performs only one local search at the finest level, and its overall computational cost and data bandwidth burden decrease. according to different motion area, the search methods dynamically are also introduced

    根據這個初始運動矢量對當前塊的運動類型進行分類，針對不同塊的不同運動內容，確定每一塊運動矢量搜索的起點、搜索的范圍和搜索策略，小運動塊的搜索范圍小，大運動塊的搜索范圍大，這樣既可節省計算量，也可以減小搜索范圍，而且不影響搜索精度，因而搜索效率高。
  3. Line integral convolution ( lic ) is one of texture - based methods for vector field visualization. even in the vector direction changing sharply fields, the method can show the direction of the vector field well, and display details of the vector field better. in addition, it can fully disclose the relativity among every spot of the vector field

    線積分卷積（ lineintegralconvolution ， lic ）方法是一種基於紋理生成技術的矢量場可視化映射方法，線積分卷積法能連續反映場中各點切矢，即使在矢量方向變化很大的區域，也能揭示出矢量的方向，可以較好地表達出矢量場的細節。
  4. Win600 automobile lift has the same control system as freight lift, i. e. micromputer control or plc control, and the same tracyion system as freight lift, i. e. vvvf vector control, to make it safe, reliable, stable, comfortable, energy - saving and of high leveling precision as freight lift. the car is equipped with four or six symmetric guide rails, to solve the problem of wobbling caused by the unbalance load of car and reduce the noise of operation, the door is equipped with reliabe optical screen protction or infrared electronic protecyion, to ensure the safe entry and exit of automobile. the double - controller design inside the car gives convenience to the operation of automobile driver

    Win600系列汽車電梯的控制系統與載貨電梯一樣採用微機或plc控制，拖動系統樣採用vvvf矢量控制，因此，同樣具有安全可靠平穩舒適節能環抱平層精度高的特點。轎廂採用對稱的4根活6根導軌導向，解決了轎廂裝載不平衡引起晃動的問題，降低了運行的噪音。轎門裝有高可靠的光幕保護活紅外線電眼保護，保證汽車安全的進出。
  5. Firstly, e - hmm is used to parameterize face image, the output likelihood of the e - hmm is encoded to form the input vector and is sent to the ann. by taking advantage of the discriminative training of ann, the weak discrimination of the maximum likelihood criterion can be improved, and the recognition performance can be improved by means of the learning ability of ann

    該混合識別網路用e - hmm的參數來描述人臉的整體性和局部細節性特徵，用e - hmm的輸出似然值序列組成ann的輸入矢量，利用ann的鑒別訓練能力來克服e - hmm的基於最大似然準則訓練演算法區分力較差的弱點，同時利用ann的學習能力來提高e hmm的識別性能。
  6. The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced

    論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況，在回顧電梯液壓控制系統節能技術的基礎上，介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理，分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式；詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計，重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容；最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。
  7. After the analysis of the state of converter switches, the voltage space vector is received. on the basis of hexagon stator flux trace method of traditional direct torque control, by changing the regulation of stator flux, hexagon and approximate round trace of stator flux can be got when using different voltage space vector. the fast regulation is realized when three - value regulator is used to adjust torque

    通過對逆變器開關狀態的分析進而得到電壓空間矢量，並且論述了電壓空間矢量與轉矩和磁鏈之間的關系，使用兩點式調節方法對定子磁鏈進行調節，實現六邊形磁鏈軌跡和圓形軌跡方案，對轉矩採用三值調節器進行調節，以實現轉矩的快速調節。
  8. In this paper, a new control strategy based on the adaptive deadbeat voltage space vector is presented. this control scheme has a lower sample frequency and a smaller difference between switch frequency and sample frequency. it has many advantages, such as producing zero vectors organically, tracing exactly, non - shaking, etc. and its dynamic response is better

    對于電能質量調節器來講， pwm跟隨指令參考信號的控制性能在很大程度上影響著裝置的補償效果，本文選擇無差拍電壓空間矢量控制為系統控制策略，這種控制方法具有采樣頻率低，開關頻率與采樣頻率的差距小，能有機地產主零矢量、跟蹤精確以及無抖振等優點，動態響應快。
  9. Conditions of normal mode realization are deduced and optimized model with the multivariate mode indicator function as the target function is built. through solving the maximal eigenvalue problem, the original shaker force vector of appropriation is reached. then the realization approach of the optimal shaker force vector based on single shape principle is proposed and at the same time the automatization of normal mode appropriation is realized

    對于模態物理分離技術的多點正弦激振純模態試驗技術，尋求其最佳激振力矢量是最為關鍵的環節，本文先推導出純模態實現的條件，建立以多變量模態指示函數為目標函數的優化模型，通過求解最大特徵值問題，得出適調純模態的初始激振力矢量，再提出以單純形原理為基礎的最佳激振力矢量的實現方法，同時也實現了純模態適調過程的自動化。
  10. Another algorithm is based on pixels : sample many points along the curve, round them to the nearest integer and set each pixel the computed point falls in. although this algorithm uses integer arithmetic, it provides the smooth curve possible at the expense of computation time as many points have to be computed to ensure that no gaps are created along the curve. furthermore these two algorithms we mentioned above is appropriate for low degree parametric curves, for high degree parametric curves, we usually approach them by using low degree rational parametric curves, the generating curve ' s fairness property is not very good

    我們知道當節點矢量的兩端節點均為k重節點且無內節點時， b樣條基函數退化為bemstein多項式，因此該生成演算法還可推廣到b能ier曲線中，具有廣泛的應用價值、同樣地，在cad和cagd中，有理b樣條曲線，特別是非均勻有理b樣條曲線（ nurbs ）已經成為曲線曲面設計中最廣為流行的技術，然而對這些曲線目前也尚無很好的曲線生成演算法，因此有理b樣條曲線的生成演算法無疑有著更重要的意義
  11. Current nod external nomal method can accurately solve the initial clearance of contact curved surface. the accurate analysis of load distribution, longitudinal load dispersion and contact patterns to spiral bevel gears has been deduced, and that the variation of the contact center of loaded spiral bevel gears and the contact center of non - loaded spiral bevel gears has been analysed

    當前節點外法矢法可以精確計算接觸曲面的初始間隙量，本文用這一方法對螺旋錐齒輪齒間載荷分配、齒向載荷分佈以及接觸區形狀進行了精確分析，而且分析了加載情況下螺旋錐齒輪齒面接觸中心點軌跡與無載下螺旋錐齒輪接觸軌跡的變化。
  12. This strategy has many advantages : solving the problems that the system is unsteady under super - synchronization ; improving power factor of stator ( it is unity relative to that of rotor ) ; no rotor position sensor and no initial position measurement, easily building up doubly fed speed adjustment system with speed sensorless because adjusting speed is taken in the rotor coordinate and rotor current vector fixing is implemented

    該方案由於引入了定子電流勵磁分量的閉環控制，使系統同時具有轉速和勵磁調節兩個調節通道，具有如下優點：一、解決了超同步工作工況不穩定的問題；二、提高了定子側的功率因數（與轉子側功率因數為1相比） 。三、由於速度調節在轉子坐標系下進行，並以轉子電流矢量定向，所以無須轉子位置傳感器，也不用檢測初始位置，易於組成無速度傳感器雙饋調速系統。
  13. In dtc system, the concept of space vector is introduced to analyze and control the ac motor, the electromagnetic torque and flux are calculated and controlled in the stationary coordinate, and the optimal pwm gating signals are generated to control the inverter to acquire high dynamic torque according to the output of the bang - bang regulators

    直接轉矩控制採用空間矢量的概念來分析三相異步交流電動機的數學模型和各物理量，直接在靜止坐標系下計算與控制交流電動機轉矩和磁鏈，藉助于離散的兩點式調節產生pwm信號，直接對逆變器的開關狀態進行最佳控制，以獲得轉矩的高動態性能。
  14. 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。
  15. Several surface fitting methods are d iscussed. the parametrization of scattered data, the selection of knot vector, th e control of precision and the stability of the methods are analyzed, and the algorithm for b - spline surface fitting to scattered data in specified tolerance i s given

    2 ）研究了對散亂數據進行b樣條曲面擬合的問題，討論了數種常用的曲面擬合方法，分析了散亂數據的參數化、節點矢量的選取、精度控制、數值穩定性等問題。
  16. Vector data require far less storage than raster data because arc node lists simplify and reduce the data required to make sense of the features contained in the map

    矢量數據要求的存儲要比柵格數據少得多，因為弧節點列表簡化並減少了表示地圖中包含的特徵所需的數據。
  17. According to the fault of complicated calculation - control, characteristics easily affected by the induction motor ' s parameters and the different result between practical function and theoretical analysis in vector control and the defect of the traditional dtc, i designed a new dtc which uses a three - value regulator to get quickly torque control and adopt the control scheme of invariable magnetic chain to improve the performance of adjusting velocity of the induction motor

    由於矢量控制技術中出現的運算復雜、特性易受感應電動機參數的影響和實際運行結果難于達到理論分析的結果等缺點，以及傳統的直接轉矩控制方法的不足之處，設計了新的直接轉矩控制方案。這種方案是應用三值調節器來獲得快速的轉矩控制，並且採用磁鏈恆定的控制方法以提高異步電動機的調速性能。
  18. Traditional direct torque control uses two value torque regulator which makes zero voltage vector work long and make flux shape bad seriously and makes response time long when the speed of induction motor is very low or drops down quickly. in order to solve this problem the thesis puts forward a new way to use three - value torque regulator, when the motor speed is very low or drops down quickly, the contrary voltage vector is used instead of zero voltage vector and the between the stator flux and rotor flux is reduced quickly so that torque is reduced quickly and response time becomes shorter

    為此，本論文提出三點式轉矩調節，這樣當電機低速運轉或給定轉速突降時，不是加零電壓矢量，而是加反方向的電壓矢量，使定子磁鏈與轉子磁鏈之間的夾角迅速減小，從而使電磁轉矩也迅速減小，大大減小了調速時間，同時磁鏈值仍然保持基本恆定，輸出比較穩定的電磁轉矩，這在電機制動過程中非常有用。
  19. The purpose of this paper is to transform black - white raster image into vector storage after preprocessing and vectorizing steps. an improved vectorization algorithm is presented after theoretically analyzing and comparing different vectorization methods

    採用模式識別技術，將二值點陣圖像信息通過預處理、矢量化處理等環節轉換為矢量信息存儲是本文研究的主要目的。
  20. 3 ) b - spline surface fitting to contour data is studied. a fitting method of using uniform knot vector is given. using this method, the resulted b - spline s urface not only satisfy the requirements of precision, but also possess fewer c ontrol vertices and good fairness, the computation speed is greatly improved t oo

    3 ）研究了逐層掃描數據的曲面擬合問題，給出了一種是利用統一的節點矢量進行擬合的演算法，用該法得到的b樣條曲面不僅可以滿足精度要求，而且具有較少的控制頂點和較好的光順性，計算速度也有較大的提高。
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