concave and convex 中文意思是什麼
concave and convex
解釋
凹面和凸面-
Our " standard " product line includes cylindrical lenses, lenses, plano - convex cylindrical lenses, plano - concave cylindrical lenses, spherical lenses, aspherical lenses, prism, filter, window, achromatic lenses and reflector etc
我們的生產包括:柱面鏡球面鏡非球面鏡棱鏡平鏡膠合鏡透鏡反射鏡濾光片偏光鏡等。 -
Alternative characterization of concave and convex functions which is sometimes useful.
對于凹函數和凸函數還有一個替補的表徵，有時它是有用的。 -
Located along the northern silk route between central asia and metropolitan china proper, and serving as a meeting ground of " western regions " ( xiyu ) and indigenous cultural influences, dunhuang provides a continuous record of datable monuments, from the fifth century onward, showing the importation of the indian chiaroscuro style, known in chinese as aotu hua, " concave - and - convex painting, " and its eventual transformation into the indigenous chinese pictorial idiom
摘要作為絲綢之路上一個西域和本土文化的匯合地點，敦煌藝術提供了5世紀以來西域「明暗法」風格即文獻上所謂「凹凸畫」以及這種畫法最後變成中國本土繪畫筆墨風格的一個可確定時代的連續記錄。 -
This article takes the lagrange equation as the principle, establishes mathematics modeling to the inertia brake vibration when it brakes, then simulates it with matlab. this paper educed the relation equations between, which are the inertia brake ' s friction coefficient of the brake ring and the friction disk, the mean radius, the braking force, rotation inertia of the driving top and the spline shaft, spiral climbing angle of the brake ' s concave - convex helicoid, the mean effort radius of the concave - convex helicoid, elasticity coefficient of the spring, quality of the driving top and the spline shaft, rotations inertia of the brake ' s rotation part besides the driving top and the spline shaft, suppresses sleeve. provides the theory basis for the inertia brake structure optimization
本文以拉格朗日方程為理論基礎，對慣性制動器在制動時的振動進行數學建模，然後用matlab對其進行模擬，得出了慣性制動器在制動時振動角頻率分別與制動環和摩擦片之間的摩擦系數、制動力的平均半徑、主動頂和花鍵軸的轉動慣量、慣性制動器的凹凸螺旋面的螺旋升角、凹凸螺旋面平均作用力的半徑、彈簧的彈性系數、主動頂和花鍵軸的質量、慣性制動器除主動頂和花鍵軸外其他部分的轉動慣量和、頂壓套的質量等慣性制動器各零部件的物理參數之間的關系，為慣性制動器的結構優化提供了理論依據。 -
Hockney surmises, however, that this convex mirror could be turned around and used as a concave projection mirror : “ if you were to reverse the silvering, and then turn it round, this would be all the optical equipment you would need for the meticulous and natural - looking detail in the picture
但霍克尼的猜測是，把這個凸面鏡前後反轉過來，便能當成可投射的凹面鏡來用：如果你把銀塗在凸面鏡的反面，並將它反轉過來，就變成能做出精細自然畫面的道具了。 -
This paper referred to the massive domestic and foreign technical material, elaborated in the sheet forming value simulation theory essential technology in detail, points out when analysis sheet forming question should use the big distortion ball plasticity fem and introduce the application characteristic and the function summarizes of the sheet forming simulation software dynaform. secondly, analyzed the cover forming characteristic, simultaneously introduced the influence cover forming factor in detail : such as ramming direction, the craft addendum surface and the material pressing surface, the radius of convex - concave mold, draw bead, pressure strength, blank size and craft margin and so on. and simulates many typical automobiles cover panel with software : such lateral board, back taillight pedestal and storage cover
其次，分析了覆蓋件成形的特點和要求，同時詳細介紹了影響覆蓋件成形的因素如沖壓方向、工藝補充面和壓料面、凸凹模圓角、拉延筋、壓邊力、坯料尺寸和工藝切口等，並用數值模擬軟體對多個典型的汽車覆蓋件汽車后側圍板、后燈座以及轎車后備箱蓋的沖壓成形情況進行模擬，用模擬結果優化拉延工藝方案，比較了內覆蓋件和外覆蓋件在成形特點和要求的一些異同點，以及常見的起皺、拉裂和回彈、成形不足等缺陷的產生機理和相應對策，重點介紹工藝補充面和壓料面的設計及優化方法，因為拉延是沖壓工藝的關鍵工序，而工藝補充面和壓料面的設計是拉延工序的關鍵，對消除缺陷至關重要。 -
Exact travelling wave solutions and concave or convex peaked and smooth soliton solutions of camassa - holm equation
方程的精確行波解及其凹凸尖峰與光滑孤立子解 -
This machine is a kind of special equipment used for thermo - printing and creasing various products, such as cardboard, leather and plastic etc. it is suitable for thermo - printing various paper products with electrochemical aluminum and also used as a creasing and cutting machine for mould cutting and creasing cardboard cases and boxes. concave - convex thermo - printing of various high - grade and fine printed products can also be conducted on this machine for obtaining stereoscopic exquisite and beautiful packing and decorating products. the machine is controlled
本機是燙壓各種紙板皮革塑料等製品的專用設備。適用於電化鋁燙印到各種紙張上，又可模切壓痕各種紙箱紙盒。各種高級精細的印刷品均可在本機上進行燙印，以獲得富有立體感，精緻美觀的包裝，裝潢製品。 -
Convex and concave milling cutters technical specifications
凸凹半圓銑刀技術條件 -
Modification and match of big orthogonal convex or concave milling cutter ' s profile
大前角圓弧銑刀齒形修正擬合 -
Convex and concave milling cutters - part 2 : the types and dimensions for convex milling cutters
凸半圓銑刀的型式和尺寸 -
Convex and concave milling cutters - part 1 : the types and dimensions for concave milling cutters
凹半圓銑刀的型式和尺寸 -
As a new type gear transmission, double circular arc profile bevel gearing carries out its transmission by means of meshing between convex - concave tooth profile in both of the direction of tooth trace and the direction of tooth depth, so it has advantage of high load capacity, long service life, easy forming hydrodynamic oil film between teeth as well as high quality of running - in etc. therefore, more attention has been paid to its application and research in recent years
作為一種新型齒輪傳動方式，雙圓弧弧齒錐齒輪傳動不論在齒線方向、還是在齒高方向，均為凸、凹齒廓相嚙合，因而它比一般的弧齒錐齒輪傳動的承載能力高，使用壽命長；並且在嚙合過程中兩齒面間容易形成潤滑油膜，具有良好的跑合性能，所以對它的應用和研究日益受到人們的重視。 -
2. sperm ultrastructure the sperm is nonflagellated and composed of a main body in which including nucleus n apical cap and a little cytoplasm and a single spike extending from the convex surface of the apical cap, which consists of about twenty radial fibrillae on which exhibiting periodic cross - striations. the concave surface of the apical cap surrounds the little cytoplasm which is highly condensed and has n ' t any organella and sperm nucleus, which is uncondensed and composed of filamentous materials and many membrane - bound vesicles
外形呈圖釘樣，由主體部和棘突組成，主體部包括帽狀體、細胞質帶和精核。帽狀體由約20根輻射狀排列的纖絲組成，纖絲具橫紋。其凸面延伸成棘突，棘突內纖絲是帽狀體內纖絲的延續，亦具橫紋。 -
Spiral bevel gear presents serials of good performance at transimision, carrying capability etc, of which klingelnber cycloid bevel gear is mostly widely used. it has its own characteristics : ( 1 ) the concave and convex flanks of the gear slot are cut at the same time continuously, this benefit to improve productivity. ( 2 ) universal double cutter heads are used which make it easier to control the tooth contact area
螺旋錐齒輪具有傳動性能優良，承載能力高的優點，克林貝格擺線錐齒輪是一種最具代表性的螺旋錐齒輪齒制，除具有一般螺旋錐齒輪的優點外還具有以下的特點: （ 1 ）採用連續分度雙面法銑齒，避免了跳齒分度，有利於提高加工精度。 -
High speed impact hammer is used to heat and hammer the seams of the upper and vamp and the edge of welt so as to eliminate the concave and convex and to flatten the edgefold with uneven thickness
採用高速沖擊錘頭對皮鞋的鞋面鞋幫的接縫、鞋口的邊緣進行加溫錘擊，使凹凸不平、厚薄不均的折邊整平。 -
It is found that : ( 1 ) for linear slope, redistribution of incoming energy flux in modenumber space depends on both the modenumber of incident waves and the ratio of the slope of incident wave ray to slope of topography ; both the transmitted and reflected energy flux ( only for supercritical linear slope ) focus near one or two modenumbers ; for supercritical linear slope, the energy flux scattering to higher modenumbers becomes larger and the energy flux to lower modenumbers becomes smaller as the slope of incident wave ray comes near to slope of topography ; ( 2 ) for convex slope, energy flux is redistributed in wide - range modenumbers and also show peaks on lower - modenubers and higher - modenumbers ; ( 3 ) for concave slope, energy flux is also redistributed in wide - range modenumbers, but does not show peaks on higher - modenumbers as supercritical linear slope and convex slope do ; ( 4 ) the total energy flux scattering to higher modenumbers is approximately equal to the total energy flux to lower modenumbers for internal waves propagating over both convex slope and concave slope, which means the concave slope is the same efficient to convex slope in scattering energy flux to higher modenumbers ; ( 5 ) for convex slope, the wave ray reflected from near - critical topography can extend to deep ocean and shallow shelf, while for concave slope, the wave ray reflected from near - critical topography can only extend to limited distance, then meet the topography and be reflected again ; generally the shear of the internal waves reflected twice from concave slope is not enhanced while the enhanced shear does also appear before second reflection takes place, the enhanced shear can bring about intense mixing, so internal waves reflected from concave slope can also produce marked mixing near critical slope
3 、內波在凹地形上傳播時，能通量在模態上的分佈范圍也比較寬，但與凸地形和超臨界線性斜坡地形相比，能通量在高模態上的分佈沒有明顯的峰值。 4 、從總的能通量來講，內波在凸地形和凹地形上傳播時，向高模態散射的能通量與向低模態散射的能通若十地形下內波傳播及內潮生成問題的理論解量近似相等，這意味著二者在向高模態散射能通量方面具有同等效率。 5 、凸地形上臨界點附近的反射，反射波的波射線能夠延伸到深海和陸架，凹地形上臨界點附近的反射，反射波的波射線很快遇到地形發生二次反射，一般來講二次反射后回到深海的波動其速度剪切並不很強，但是在進行二次反射之前的區域，速度剪切仍然很強，因而內波在凹地形上的反射依然能夠在地形附近區域，產生強的速度剪切區，誘發混合。 -
Experimental investigation on noise characteristics of jets impinging on concave and convex plates
凹凸板沖擊射流噪聲特性的實驗研究 -
These methods are lagrange mean - value theorem, monotone function, extreme value of function, taylor formula, concave and convex function
提出六種常用的方法，並指出每一種方法的適用類型、解決問題的關鍵和證明問題的具體步驟，最後結合實例說明方法的可用性。 -
Application : grind the surface of wood and metal. lap the hole and surface of work - piece. gind and lap flexible contoured suface, especially concave and convex surface profiles
用途：應用於木材和金屬的表面拋光、工件的內孔、外壁的精磨、用於彎形物的曲面、尤其是凹凸表面和側面的研磨、拋光。適用於鑄鐵、木材、鋼材、有色金屬、塑料。
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