曲率量 的英文怎麼說
中文拼音 [qūlǜliáng]
曲率量
英文
curvature measure-
The quantities baβ are the covariant components of a plane tensor, called the curvature tensor of the surface.
ba是「平面張量」的協變分量,叫做該曲面的曲率張量。Chapter 3 erected the relationship between refraction error and cornel ablation depth in theory. the paper proposed various mathematical models which can be used for proceed the simple myopia, simple hypermetropia, compund myopia astigmatism, compund hypermetropia astigmatism, simple myopia astigmatism, simple hypermetropia astigmatism, mixed astigmatism. the influence of the astigmatic axis and the degree of astigmatism on the correction field is discussed. wavefront aberration guided excimer laser cornea ablation is a main method of customised corneal ablation
以數學的方法研究出了屈光性單純近視、屈光性單純遠視、復性近視散光、復性遠視散光、單純近視散光、單純遠視散光、混合性散光屈光矯正的物理模型;並揭示了不同軸位的轉換規律,對不同散光情況下的初始角膜兩個不同方向的曲率半徑和手術后最終的曲率半徑作了定量的研究。The study of comparison of corneal diopter measured by corneal keratometer and corneal topographer
角膜曲率計與角膜地形圖儀測量角膜屈光度的對比研究Based on the diopter status of myopia and hypermetropia, the paper presented the principle of excimer laser refractive surgery, the change of impacting cornea curvature on the cornea diopter. in this chapter, we also discussed excimer laser - corneal tissue interactions and photoablation. determine the relationship between the fluence of arf excimer laser and the cornea ablation rate, attain the relationship between the energy density and the ablation depth
研究了激光與生物組織相互作用、光蝕作用及準分子激光消融角膜的機理;首次定量研究193nm準分子激光高斯光束的切削量與能量密度的關系,計算單個激光脈沖角膜切削量;發現了角膜曲率對切削效果的影響,首次提出了角膜曲率半徑、切削位置與切削深度的關系;首次定量確定了激光光斑參數及其排列方式對術后角膜表面粗糙度的影響,為更精確實現角膜切削和提高切削后角膜表面光潔度、減少手術后角膜渾濁及角膜表面術后不規則提供了理論依據。Einstein theory of relativity told us that mass and energy determine the geometry of spacetime and any curvature of this spacetime shows itself as the gravitational force
愛因斯坦的相對論提出,質量和能量決定時空的幾何形狀,而時空的彎曲率則以引力的形式表達出來。Analysis of measuring corneal refractive power by corneal topographer compared with by keratometer
角膜地形圖儀和角膜曲率計測量角膜屈光力的差異分析Within the frame of the abcd formulation of propagator of a time - dependent quantum system, the abcd law is extended to the so - called effective abcd system which effective beam quality factor is conservative ; we discussed the system like the propagation of the atom laser beam
如果考慮原子激光內部原子間相互作用的影響,就要引入描述原有品質因子和原子間相互作用綜合作用效果的物理量? ?有效品質因子和有效復數曲率半徑,利用heisenberg圖像得到傳播子的有效abcd形式。The equation for the quasi - continuous atom laser beam wave - function is given by schrodinger equation, the beam width, divergence curvature radius and quality factor were introduced to represent the atom laser beam whose transverse potential could be separated. for the conservative quality factor system in some direction, we can ge t the propagator of abcd formulation
本文在含時量子系統傳播子的abcd形式理論的基礎上,引入某一方向的束寬、發散角、曲率半徑和品質因子等光束傳輸參數來表徵橫向勢能滿足x和y分量相互獨立的原子激光的傳輸。Yet the vast collection of solutions are not all equal : each configuration has a potential energy, contributed by fluxes, branes and the curvature itself of the curled - up dimensions
但是這眾多的解並不是每個都相等的:每個組態具有由通量、膜與捲曲的維度自身曲率所產生的位能。Locally symetry hypersufraces with constant mean curature
關于局部對稱空間中具有常數量曲率超曲面Lots of concrete examples are (, ) - metrics. and one of fundamental problems in finsler geometry is to find and study finsler metrics with constant ( flag ) curvature. on the basic, we majarly study the following problems in present paper : ( a ) to the property of a class of (, ) - metrics in which is parallel with respect to riemann metric a and riemann metric a is of constant curvature, we obtain the following theorem4. 3 let f (, ) be a positive definite metric on the manifold m ( dimm > 3 )
在finsler幾何中,我們現在已知的finsler度量已經很多了,但大多數具體的例子主要都集中在( , ) ?度量中,又在finsler幾何中一個基本的問題就是去發現和研究具有常曲率的finsler度量,基於這些本文主要研究了以下一些問題: ( a )一類關於是平行的並且riemann度量具有常曲率的( , ) ?度量的特殊性質,得到了如下的定理4The position and size of the monochromator, focusing curvature radii and tilting angles of the germanium focusing monochromator under different different take - off angle, size and divergency of the second collimator and intensity loss due to the use of it were determined. the neutron flux at different wavelength, under different reflection and take - off angle of the monochromator and divergency of the first collimator, were given. the simulation on the aperture used for limiting beam size in front of the sample showed that, smaller the size of the aperture and further the distance from the aperture to the sample, greater the loss of the intensity and more serious the spread of the beam along vertical direction at the sample position which makes the practical sampling volume greater than expected
用蒙特卡羅模擬方法對中子應力衍射譜儀的設計方案進行了優化研究,提出了一系列可供參考的數據:確定了單色器的位置、尺寸、垂直聚焦單色器在不同起飛角下的聚焦曲率半徑和傾角;討論了第二準直器的尺寸和發散,以及使用第二準直器造成的強度損失;給出了在不同單色器反射面、起飛角、中子波長和第一準直器發散度的情況下樣品處的中子注量率,以及多種組合情況下譜儀的解析度曲線;對限束方孔的尺寸、距離樣品遠近對強度損失和測量中的影響做了深入研究。The result showed that the red koji produced by millet could produce yield of 30 % - 35 % and had better quality and higher color value than that produced by corn
該文介紹了以小米為原料,採用巨紅3號紅麴黴菌種,生產紅曲的技術,其中包括原料處理、冷卻與接種、保溫培養等,接種量為1 %時,生產的紅曲質量優于玉米,秈米原料,色價高,出曲率30 % ~ 35 % 。Comparison of keratometric readings of orbscan to eyesys corneal topography and keratometer
角膜曲率計測量角膜曲率的比較Corneal refractive power measurement with orbscan - topography system versus keratometer
角膜地形圖儀與角膜曲率計測量結果的比較A comparison of keratometer measurement and corneal topography in the measurement of keratometer before and after orthokeratology
角膜塑形術治療前後角膜曲率計和角膜地形圖測量值比較Road testing. measurement of a rolling load deflection. part 7 : determination of deflection and curvature values using curviameter
路面試驗.滾動加載撓度測量.第7部分:用曲率計測定撓度和曲度值The contacting measurement method with a double probe is put forward after the detailed analysis of the state - of - the - art measuring methods of the thickness of wall. firstly, the theory - profile generatrix is built, and then the movement curve of the track of joint center is constructed, which aims at making the joint center move along the movement curve and keep the fixed sensor touching the wall. the measuring sensor examines the line in its normal direction of the interior wall all the time, the data from the sensor is the thickness value of the wall
論文通過分析國內外變曲率回轉體壁厚測量的現狀,提出了雙測頭接觸式測量方案:通過構造理論輪廓母線,建立鉸鏈中心的運動曲線,使鉸鏈中心始終沿運動曲線運動,以保證固定觸頭與傳感器測頭的連線始終在內壁法線方向上,從而傳感器測頭所得的數值即為壁厚值,該方案經模擬測試實驗取得了預期效果。Suanifolds with the vanishing normal curvature tensor in locally syetric space
局部對稱黎曼流形中法曲率張量場消失的子流形Basically like “ adaptive approach ”, the method can control triangulation density with respect to the change of normal curvature of the surface generating a small number of triangular facets, and thiny triangles, degenerate triangles and “ cracks ” in 3d space will not occur, but the speed of the algorithm is higher than that of adaptive one
該方法基本上可以像「自適應」方法一樣,根據曲面的法曲率變化來控制三角化剖分的密度,生成的三角片數量較少,並且可以避免在三維空間產生狹長的三角形、退化三角形與「裂縫」 ,運行速度明顯比自適應方法快。分享友人