自由曲面 的英文怎麼說
中文拼音 [zìyóuqūmiàn]
自由曲面
英文
free-form surface-
The trajectory of antisubmarine homing torpedo is a complex space curve, so there is big limitation in accounting its trajectory length by plane geometry
由於反潛自導魚雷的彈道是一條復雜的空間曲線，因而平面幾何解析法求解其彈道長度有較大的局限性。Abstract : in the research of internal combustion engine, recordingin - cylinder pressure and temperature is an essential technique to study the thermal cycle of internal combustion engine. the combustion analyzer developed in this study will give both the measurements at sampling points per crank angle or sampling cycle, calculate and show the real time parameters which decide the working process of internal combustion engine, such as pressure accelerating rate, indicateed mean effective pressure, cycle - to - cycle variation, heat release rate, etc. compared with the imported congeneric products, the analyzer has many advantages such as chinese interface, low price, easy operateing, convenience in maintainance and easy upgrading
文摘:為了測錄內燃機缸內的壓力及溫度，開發了一種內燃機燃燒分析儀.該分析儀由國產高速數據採集卡及自行開發的控制軟體組成.它不僅能精確設置每度曲軸轉角內采樣點的個數和採集循環數，而且在採集過程中能實時計算和表徵內燃機工作過程的壓力升高率、平均指示壓力、循環變動率、放熱率等參數.經實際使用以及與國外產品相比表明，此分析儀具有全中文界面、價格低、操作簡單、使用維護方便、功能便於擴充等優點In eq. (53)it is assumed that there is no restraint to the free warping of the cross sections.
在式（53）中，可假定對截面的自由翹曲沒有阻礙。So far, the main frame of the conjugation of betrand are established, on the basis of which, it is given that the primary condition the directrix line must be satisfied, the relative curvature of the conjugating surfaces, the relations between non - interventional condition and curvature axle of the directrix line, and so on. the transmission of normal circular - arc gear is a typical bertrand conjugation. in order to promote the transformation from theory to technology, the general principle of this kind of transmission is studied
為了使研究更加貼近於工程，便於解析處理，提出準面的概念，並確立由準面到準線的研究路線，給出了各種傳動形式下準面與準線的具體特徵，證明了共軛準面上兩準線的誘導測地曲率等於零的這一不干涉條件，進而指出，當準面為平行軸和相交軸傳動的節曲面時，不干涉條件自然滿足。Secondly, its content hasconflict with the system and it can make the system to a downfall. among the three characters. information organization is the most impotw andstable while benifit organization and control lbject embody the artificial operatingcharatel ii. fundamental causes of medium ' s industriazationwth the development of huznan societyindustry revolution happened in thewest accelerated society productivity and solved the technical obstacles of publicconununication meditun. bourgeois was becoming stronger and stronger andovercame feudality at last. wth the victory of bourgeois, market economy was devoloing quickly. thepublic communication medium of capitalism are now pursuing benefits bothobjectively and subjectively but it is impossible in the past and accomplished theprocess of early industriaiization. ' it is discussed from chinese public communication medium - - - - newspaper ' semergence, developing process and its sinuosityit comes to a conclusion that thefundarnental cause of the public communication medium is that benefit and controlinieract each other. that is to saywhen benefit is stronger control is weaker and viceversa. lll. the proccss of chincse mcdium and individual devclopmcntl. under the functions of intemal prusuing benefit desire and pursuing benefitcondition, it appeared the upsurge that newspapermen set up newspaper and new tvstation was set tip from l979 to l982. 2. the upsurge of a series of tv channel and enlargement in newspapel3. the cooperation of post and delivery and owning delivery also gives a rapiddevolopment to newspapers. 4. the strengthening of individual collectivization embodies that theindustrialization gets on a new stage. 5. the illtemational fimds also ellter into
資產階級的勝利，市場經濟得以迅速發展，資產階級的大眾傳播業主完成了由過去不能追求、也沒有條件追求經濟利益而變成了主觀上努力追求，客觀條件上也能夠追求經濟利益的轉變，從而完成了大眾媒介最初的產業化過程。從中國大眾傳播媒介? ?報紙的產生，發展過程及其曲折等方面來論述，得出了大眾傳播媒介產業化的最根本動因就是利益和控制的互動，也就是說利益強時控制則弱化，當控制強時則利益弱化。三、中國大眾傳播媒介產業化進程和個體發展第一、在自身獲利慾望及外在獲利條件的雙重作用下，從1979年至1982發生了在報業的第一次辦報熱潮和發生在廣播業電視業的建臺熱。Due to the requirements of complex configuration of spatial curved surfaces and of continuity of fiber laying have becoming a difficult problem in cad technology for bicycle body frame of hybrid fibered compound material with multi - branch special shaped entire - body and sections of hollowed thin wall
摘要對于多分支整體異形空心薄壁斷面混雜纖維復合材料自行車車架，由於復雜的空間曲面構形和纖維鋪設連續性要求成為其cad技術難題。This disquisition aimed at plc reactive dispatch curve controller, associating the entire exploiting process, expounded in guiding ideology, control standard, function and structure design, software system design, analog experiment, fixing and debugging and so on, also part of flow schematic diagram ( the ladder chart was n ' t drawn because of too many network and length limit ). this design involves many subject such as power systenu automatic control microcomputer control and electroa during the design, we have read a great deal of concerned data, base on the sufficient investigation analysis and research, associating the practicality of huanren power plant, we introduced and exploited plc reactive dispatch curve controller in the first time
本文針對plc無功調度曲線控制器，結合整個研製過程，在設計指導思想、控制準則、性能設計、裝置構成設計、軟體系統設計等方面進行了闡述，並給出了部分程序流程簡圖（由於梯形圖網路數太多，受篇幅限制沒有給出） 。本設計涉及到電力系統、自動控制、微機控制、電子等多學科知識，在設計過程中，我們查閱了大量相關的資料，在充分調查、分析、研究的基礎上，結合桓仁發電廠實際情況，首次提出並研製出了plc無功調度曲線控制器。The convergence of error brought about by the curvature of earth's surface obviously has no counterpart in free space.
地球表面曲率產生的誤差是收斂的，顯然，在自由空間沒有類似的情況。It offers the idea according to problem faced, considering the good character of the ends, the ajusted cubic b - spline curve is used to fit ship lines. it finds out the control vertexs according to a sequence of given points, and then, through particular formula, each point in the curve could be worked out. it smoothes lines with the method based on small - paramter
針對面臨的問題，提出了自己的思路，在數學計算方法上，由於三次準均勻b樣條曲線良好的端部性質，這里用它來擬合船舶型線，首先根據所給的初步型值求出其控制頂點，然後根據相關公式進行插值便能得到曲線上的所有插值點。Measuring method and technique that 3d surface shape is recovered from 2d gray image ( shape from shading ) can obtain surface shape by natural way and easily realize the information integration of intersystem. particularly, this technique belongs to non - contact measurement, and it has become a puzzle and hotspot question in image measuring domain based on vision in recent years
直接由物體的二維灰度圖像恢復其三維幾何形狀（由明暗恢復形狀）的曲面測量方法和技術，能以自然方式提取物體表面的形狀信息，且易於實現系統間的信息集成，尤其是該方法屬于非接觸測量方法，特別適合於測量由彈性模量低的易變形材料製成的零件，近年來一直是基於視覺的圖像測量領域研究的難點和熱點問題。When submarine curves close the water surface, the course is affected by the quasi white noise disturbances. the close water control structure is same with that in deep water. the simulations show that the control effects are close to the ideal situations
由於在近水面航行時，航向所受到的主要是接近於白噪聲的干擾，所以採用了結構和水下相同的航向自動舵，由模擬曲線可看出控制效果比較理想。This one - constraint - less property of the kruppa equations is their inherent deficiency and is independent of camera motion. this deficiency is due to their failure of automatic enforcement of the rank - three - ness on the absolute quadric
從而， kruppa方程的獨立個數比基於絕對二次曲面或基於無窮遠平面的自標定方程的獨立個數少1 ，這是源於kruppa方程不能保證絕對二次曲面的秩為3 ，是由kruppa方程自身的特性決定的，而與攝像機的運動無關。In the first part, depending on three or more images, the main research work are listed as follows : ( l ) using svd decomposition to realize projective reconstruction ; ( 2 ) realizing camera self - calibration by solving kruppa ' s equation ; ( s ) recovering euclidean reconstruction from projective reconstruction. depending on only two images, the main researches are : ( l ) making out infinite plane homography matrix by using scene structure information, then recovering affine reconstruction from projective reconstruction ; ( 2 ) making out the absolute conic images by using scene structure information, and then recovering euclidean reconstruction from projective reconstruction
在第一部分中，針對三幅及三幅以上的圖像，主要研究：利用矩陣奇異值分解（ svd ）實現射影重構，通過求解kruppa方程實現攝像機自標定，由射影重構恢復歐氏重構；針對只有兩幅圖像的情況，主要研究：利用場景結構信息求解無窮遠平面的單應矩陣，由射影重構恢復仿射重構，利用場景結構信息求解絕對二次曲線的像（等價于標定攝像機） ，由仿射重構恢復歐氏重構。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。A ceremony was held in beijing, during which the amss director, professor guo lei, presented the appointment letter to professor tang. the honour was in recognition of his " significant contributions to numerical methods for incompressible flow simulations and hyperbolic conservation laws, especially for the development of moving mesh adaptive grid computations.
聘書頒發儀式在北京舉行，由郭雷院長親自頒發。該項殊榮是嘉許湯教授在不可壓流體和雙曲守恆律的計算方法，特別是自適應移動網格方法等方面作出重大的貢獻。Unfortunately, most existing mesh generation algorithms are based on the cad model of tool surfaces and can not really realize full automatization of mesh generation because missing and distortion of geometric information often occur when preprocessing systems for mesh generation receive cad models from other cad system
目前大多數基於cad模型的曲面網格生成演算法，由於cad模型在傳送過程中常產生幾何信息丟失和失真，需較多的人工干預進行模型修復，難以做到真正自動化。分享友人