速度多邊形 的英文怎麼說
中文拼音 [sùdùduōbiānxíng]
速度多邊形
英文
polygon of velocities-
And apatite. by these analyses and comparison with general granite both in china and the world and with the granite in other au or cu belt in china, the characteristics of the granite in this area are concluded as follows. it belongs to magnetite - i or syntectic granite and has crust - mantle mixed characteristics ; it was formed mainly by crystallization differentiation of melting magma and multiphase varied intrusion ; the degree of differentiation evolvement is not high ; the granite and its enclaves p. re congenetic ; the range of temperature is about 500 - 700, the range of pressure is about 2. 50 gpa - 4. 35 gpa, and the range of oxygen fugacity ( lg fo2 ) is - 15. 53 - - 14. 00 ; most granite bodies formed before the collision of plates, and few formed after the collision of plates
通過對測試數據的分析與綜合研究，並同中國和世界一般花崗巖類以及中國主要金、銅成礦巖體的花崗巖類進行對比，得出本區花崗巖類巖石具有以下特徵：屬磁鐵礦-型或同熔型花崗巖，其巖漿物質具殼幔混源特徵：主要由熔融態巖漿經結晶分異作用，通過多期變速上侵而形成；其分異演化程度較低；寄主巖基和包體具有同源性；巖石的形成溫度范圍約為500 - 700 ，壓力大約為2 . 50gpa - 4 . 35gpa ，氧逸度值1gfo _ 2為- 15 . 53 ? 14 . 00 ；該巖帶主要形成於板塊碰撞前消減的活動板塊邊緣期，為燕山至喜馬拉雅早期的大陸邊緣火山弧環境的產物。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。This machine is suitable for producing 2 - layers or multiple - layer tri - side sealing composite film bag for foods, laundry detergent, candies etc. based on materials such as bopp, opp, cpp, pe, nylon, aluminum foil, and paper, it is an ideal packing bag making facility with easy operation and rapid working, making even - face, beautiful products with highly strong heating sealing. feature : 1. the whole machine adopts industrials control level computer and auxiliary three - servo control system. the pouch - making speed, pouch making length, temperature, countring punching and conveyor quantity of doubing finished products, etc. can be preset via touch screen
該機適用於以bopp opp cpp pe尼鋁箔紙張為基材的兩層或者說多層三邊封復合薄膜袋食品袋洗衣粉袋糖果袋等的生產，本設備操作簡便，產品平整，形狀美麗，封邊處熱合強度高，制袋速度快是理想的包裝制袋設備。In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector
在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。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The system uses the permanent magnet synchronous machine as the driver motor based on the idea of polygonal flux linkage locus and the permanent magnet brush - less motor is as the momentum balance motor by means of speed and current loop in order to track driver motor precisely and rapidly. the harmonious control of driver motor and balance motor is realized by making full use of the dsp hardware resource and complicated programmable logic device. the software design is composed of c and assembly language to realize motor control arithmetic of polygonal flux linkage locus
衛星天線伺服控制系統以正弦波永磁同步電機作為驅動電機，採用多邊形磁鏈軌跡法（電壓空間矢量法）的控制策略；動量平衡電機採用永磁無刷直流電機，通過電流環、速度環達到快速、精確跟蹤驅動電機的目的，確保了衛星姿態恆定；設計方案中充分利用了dsp硬體資源和復雜邏輯陣列實現了驅動電機和平衡電機的協調控制，並通過c語言和匯編語言的混合編程實現了電機的多邊形磁鏈軌跡控制演算法。Associating with the research and development of national natural heavy concentrate system, considering the feature of natural heavy concentrate database separately stored in every province, which is of mass data, discrete, irregular distribution, and influenced by hardware factors, such as computer configuration and network transfer speed, distributive database and parallel computing philosophy is applied, zone partition and multi - threading queue method is employed to retrieve and process the discrete data within a certain polygonal zone
結合全國自然重砂系統研製，針對分散存放在全國各省的自然重砂數據庫，數據海量、離散、分佈無規律、受計算機配置、網路速度等硬體因素影響的情況下，應用分散式數據庫及并行運算理念，採用區域分片及多線程隊列方法對某個多邊形區域內的離散數據進行檢索與處理。The fatigue accumulation damage of the component has something to do with its model, different model causes different damage speed on the component which will show different magnetic memory characters. the paper build the mathematics model of wave shape of orders con - wave and accumulation damage distribution on several boundary conditions, combining theory deducing, simulation analysis and experiment validation, deducing the relation among fatigue accumulation damage degree, damage speed and magnetic memory characteristic parameters
振動構件疲勞累積損傷與振型有關，不同振型引起的損傷速率不同，具有不同的磁記憶特徵。本文將理論推導、模擬分析和實驗驗證相結合，建立多種邊界條件下的各階諧波波形與累積損傷分佈的數學模型，推導疲勞累積損傷度、損傷速率與磁記憶特徵參量的關系，並利用模擬試驗系統驗證和完善，實現利用磁記憶方法對這類累積損傷構件進行早期診斷的目的。Results showed that, attribute data obtained by this way avoided deficiency of polygon overlap way, as a result, the logistical consistency between map data and attribute data reached over 90 % on average. database pivot precision was 0. 18mm, data quantity during manipulation was decreased greatly, data treatment was more convenient, computation velocity was boosted greatly. workload of map and table pretreatment and edition was mitigated on large scale, spatial data precision was increase
研究表明：用該方法獲得的屬性數據，避免了多邊形疊加方法的不足之處，能使圖形數據和屬性數據邏輯一致性平均達到90以上，數據庫點位精度達到0 . 18mm ，且操作中圖層數據量大大減小，數據處理更為方便，運算速度大為提高；減輕了圖表預處理和編輯的工作量，使空間數據精度提高。We generated its grid surface on the fuselage or missile body according to the geometry projection relation between aerodynamic components and the bilinear interpolation approach. finally, we successfully developed a new algebra grid generation technique in virtue of the improved four - boundary interpolation. in this thesis, we put emphasis on the researches of aerodynamic inverse design and drag reduction questions for airfoil and wing using euler equations and control theory proposed by jameson
（ 2 ）進行了應用控制理論和二維歐拉方程的翼型氣動反設計，以及有升力約束情形下翼型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的數學形式，並給出了相應的梯度求解公式形式，研究發展了共軛方程及梯度的數值求解方法，成功進行了多個翼型的反設計和減阻問題研究。In this paper, i will present some algorithms of polyhedral visual hull reconstruction : ( 1 ) polyhedral v isual h ull generation a igorithm b ased one dge - pool - searching, which constrains the 3 - d intersections into the 2 - d planes intersection via the epipolar theory to reduce the complexity a nd c an r educe t he t imes f or c ones t o b e p rejected o nto t he i mage p lanes, i n which we induced the index list to every points on the surface of object, and connected the related points to get sub polygons on surface and in turn get the mesh model, we replace triangulation process of disordered points cloud by edge - pool searching. ; ( 2 ) reconstruction based on degenerated - polygon - intersection, which have the following improvements on traditional bull intersection : using degenerated polygon to orga nize intersected area on cone face, which may be discontinuous ; a fast intersection algorithm of polygons on the cone face based on degenerated polygons, which is consistent between the continuous polygons and the discontinuous ones. the intersection of degenerated polygons is similar to the convergence of two ordered lists, which is comparably simple to the bull operation ; ( 3 ) reconstruction algorithm based on ray - tracing, in which all the rays that run through the vertex on silhouette of object will intersect with all the cones correspondent to other silhouette, and we have to calculate the intersection of all such line segments, the endpoints of which are considered to lie on the surface of object and we will get the point cloud on the surface of object
同時利用共極線原理把三維計算投影到二維平面以降低求交計算的復雜度，該演算法可以減少光錐向圖像平面投影計算的次數，以邊池搜索取代散亂點集上進行的三角剖分； （ 2 ）基於退化多邊形求交的多面體可見殼模型重構，系統引入退化多邊形的概念，把錐體平面的交集中不連通的部分用一個退化多邊形來表示，並引入了新的基於退化多邊形的求交演算法，與傳統多面體可見殼重構相比，該演算法有以下幾點創新：在圖像平面以退化多邊形組織投影錐體和物體輪廓的交集，把任意錐面與物體輪廓的交集歸一到一個退化多邊形；基於退化多邊形的二維平面上多邊形快速相交演算法，該演算法在一定程度上就是兩個有序鏈表的合併，大大簡化了先前的布爾求交計算； （ 3 ）基於光線跟蹤的演算法，該演算法中所有通過輪廓頂點的光線和對應其它圖像輪廓的光錐進行求交計算，最後得到每次求交計算得到線段的交集，該線段的頂點就認為是物體表面點，從而得到物體表面的點雲。Firstly, singly linked lists are used as the data structure of this algorithm rather than doubly linked lists or trees as other algorithms use, so less memory space and running time are required. secondly, the relationship between the entry and exit points on the two polygons is found and argumentation, which, with the reasonable operations on the lists, reduces the times that the lists are traversed and allows the polygon to be input clockwise or counterclockwise
該演算法使用單線性鏈表數據結構，與其它使用雙鏈表或樹結構的演算法相比具有佔用空間少及處理速度快的特點；其次，找出並論證兩個多邊形之間進、出點之間的關系，並通過合理的數據結構處理，減少了演算法對多邊形鏈表的遍歷次數，而且允許多邊形既可以按順時針方向也可以按逆時針方向輸入。When calculating the cost of edge collapse, we consider the influence of edge length and surface curvature. and, the position of the new vertex is selected from the veytexes of the edge collapsed, this can not only preserve the initial model shape, but also reduce the calculation of cpu and meet real - time rendering of virtual environment
在折疊邊的代價估計中，均衡考慮了多邊形邊的長度和多邊形表面曲率影響；折疊邊的頂西北工業大學博士學位論文點位置從折疊邊的頂點中選取，既有助於保留了初始模型的形狀，又減少運算量，滿足快速繪制的需求。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。Effective scanning line algorithm was designed ; divided scan path was used, and extract scanning line vector to area filling. it can be concluded that this algorithm increases manufacturing velocity and accuracy
文中設計了有效的掃描線與多邊形邊的求交演算法，保證了交點的正確配對；採用分區域掃描策略，提取同區域的掃描矢量完成了掃描，使成型速度與精度都有所提高。Started from the fact that the " three forces " exert great impact on the five countries in central - asia and direct threat to the political stability in our country ' s neighboring regions, the end of the thesis advances that related measures should be formulated to strictly prevent and strike the " three forces " form the view of keeping the stability of the remote areas, meanwhile, more research should be done on the factors that may influence the developing western area by the neighboring countries with the view of global politics and new development in the new era and grasping the historic opportunities of developing western area, so as to shape a sound neighboring environment, safeguarding the strategy of developing western area being smoothly carried on, accelerating the economic development in the western area and raising people ' s living standard in the true meaning
結語部分從「三股勢力」對中亞各國形成的強烈沖擊及直接威脅我國周邊地區政治穩定的事實出發，強調從維護邊疆穩定角度，應該制定相應的措施嚴密防範，對「三股勢力」進行嚴厲打擊，同時要從全球政治和新世紀發展的角度認識並抓住西部大開發的歷史機遇，加大對我國周邊國家影響西部大開發諸多因素的研究，營造良好的周邊環境，保障西部大開發戰略的順利實施，從而加速西部地區的經濟發展，真正提高人民的生活水平。只有這樣，才能增強我們多民族國家凝聚力，有效地抵禦各種勢力的滲透和影響。This new approach adopts a grid - based line index algorithm which can facilitate the calculation of intersection points for lines, hence the speed of calculating nfp is significantly increased
該演算法採用基於網格的線段索引方法來加快線段之間的求交計算，進一步提高了臨界多邊形求解的計算速度。With over ten years ’ development, china ’ s securities market has become an important and burgeoning one with a considerable scale and active trade volume. but, in comparison with the developed financial market, china ’ s financial system and market structure has not been perfect yet, especially, china ’ s present securities market still adopts long position mechanism. the mechanism is bound to emerge accumulative cost effect
我國證券市場經過十多年的發展，現已形成具有一定規模且交易活躍的重要新興市場，然而，與發達的金融市場相比，我國的金融體系與金融市場結構還很不完備，尤其是我國證券市場目前仍採用單邊做多機制，這種機制必然會使股票市場價格產生累積成本效應，累積成本效應又必然導致證券市場的過度投機，致使金融風險以指數型速度快速聚集，股市危機成為不可避免的現實。分享友人