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refractive     
相关语句
  屈光
     Refractive regression 17.2%; Average regression(- 1.75 ± 0.64)D.
     屈光回退者占17.2%,平均回退量为(-1.75±0.64)D。
短句来源
     The age was between 21 to 30 years。 The refractive error before excimer laser surgeries was 5 21±2 79D(range, 2 to 11 5D).
     年龄在21~30岁,屈光欠矫范围为:-2.00~-11.5D(-5.21±2.79D)。
短句来源
     The mean absolute refractive error of the SRK Ⅱ formula was 1.12D and 12.5% of eyes had a prediction error greater than 2D.
     SRK-公式计算的平均绝对屈光误差值为1.12D,屈光误差大于2D者占12.5%。
短句来源
     The mean value of corneal refractive power was 42. 45±1. 34D and 95% range of normal value of that was 39. 82 D to 45. 08 D.
     角膜屈光力平均为42.45±1.34 D,95%正常值范围为39.82-45.08 D;
短句来源
     Results At 150 days postoperatively, the specific gravity of C_4 was reduced from 1.193 g/ml to 0.985 g/ml, transparency was improved from 93% to 96.5%, the refractive index changed from 1.454 to 1.343, and surface tension was reduced from 1.43 to 1.06 with its degeneration.
     结果术后150d内,随自身的降解,C4的比重从1.193g/ml降至0.985g/m,透光率从93%增至96.5%,屈光率从1.454下降至1.343,表面张力从1.43降至1.06。
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  折射
     Investigation of third order optical nonlinearity Z Scan shows that it exhibit considerably nonlinear refractive properties with α2 values of 1.1×10-11m·W-1 and n2 values of 6.055×10-18m2·W-1 respectively.
     三阶非线性Z-扫描研究表明该化合物具有非线性折射行为:其非线性吸收系数α2=1.1×10-11m·W-1,非线性折射系数n2=6.055×10-18m2·W-1。
短句来源
     Synthesis, Structural Characterization and Optical Refractive Effect of Coordination Polymer [HgI_2(bpea)]_n(bpea=1,2- bis(4-pyridyl)ethane)
     配位聚合物[HgI_2(bpea)]_n[bpea=1,2-双(4-吡啶基)乙烷]的合成结构表征和光学折射效应(英文)
短句来源
     The third-order NLO refractive coefficients (n_2) of cluster (1) are 3.18×10~(-18) m~2/W, respectively.
     三阶非线性折射系数n_2值为:3.18×10~(-18)m~2/W;
短句来源
     Design on the athermal infrared diffractive/refractive optical system in 3.2~4.5μm
     红外3.2~4.5μm波段折射/衍射光学系统的减热差设计
短句来源
     It is found that the beam-cyclotron modes of energetic electrons are unstable in the cases of N2cos2θ<1 and N2cos2θ>and stable in the case of N2cos2θ=1,where N is the refractive index and d is the propagation angle.
     结果表明,高能电子束迴旋模在N~2cos~2θ<1和N~2cos~2θ>1范围内都是不稳定的,在N~2cos~2θ=1时是稳定的,这里N为折射指数,θ为传播角。
短句来源
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  折光
     The solubilities and refractive indices of saturated solution of the systems MgSO4-CH3CONHCONH2-H2O(Ⅰ) and Mg(NO3)2-CH3CONHCONH2-H2O(Ⅱ) at 30℃ have been investigated.
     本文研究了三元体系MgSO4—CH3CONHCONH2—H2O(Ⅰ)和Mg(NO3)2─CH3CONHCONH2—H2O(Ⅱ)在30℃的相平衡,测定了饱和溶液溶解度及其折光指数,绘制了相应的溶度图和折光指数─组成关系图。
短句来源
     Both solu-bility and refractive index curves consist of two branches, whichcorrespond to solid phases La(OAc)_3·4H_2O and C_(11)H_(12)ON_2~-(antipyrine) at 0℃ and to La(OAc)_3·H_2O and C_(11)H_(12)ON_2 at30℃.
     其折光指数曲线和溶度曲线均为二支,分别与C_(11)G_(12)ON_2和La(OAc)_3·H_2O(30℃),C_(11)H_(12)ON_2和La(OAc)_3·4H_2O(0℃)的结晶相对应。
短句来源
     Solubilities and physicochemical properties (density,refractive index,viscosity,conductivity and pH) of solutions in the ternary systems Li +/CO 3 2- ,B 4O 7 2- H 2O (1) and K +/CO 3 2- ,B 4O 7 2- H 2O (2) were investigated at 298 K with isothermal method.
     研究了二个三元体系Li+/CO2-3,B4O2-7H2O(1)和K+/CO2-3,B4O2-7H20(2)298K时的相平衡关系和平衡液相的物化性质(密度、折光密、粘度、电导率、pH值)。
短句来源
     In the transparent region, the ND and VD of the ploymer were determined, and the refractive index of polymer component nD {PCd(MA)2=1.5788; nD {PBa(CA)2=1.6439; and nD(PMA)=1. 4992 respectively
     根据测定的聚合物nD值可以计算各组分的折光指数nD(PCd(MA)2)=1.5788,nD(PBa(CA)2)=1.6439,nD(PMA)=1.4992。
短句来源
     The physicochemical indexes of Flos lonicerae seed oil are as follows:d~(20)_4 0.9158,refractive index n~(20)1.4796,SV(180.31 mgKOH/g),acid value(2.55 mgKOH/g).
     金银花籽油的理化指标为:相对密度d2400.9158,折光指数n201.4796,皂化值180.31mgKOH/g,酸值2.55 mgKOH/g。
短句来源
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  折射率
     PRECISION MEASUREMENT OF REFRACTIVE INDEX OF AIR BY AN IMPROVED RAYLEIGH INTERFEROMETER
     用改进的瑞利干涉仪精确测量空气折射率
短句来源
     AN INVESTIGATION ON CONTROL OF REFRACTIVE INDEX PROFILES FOR GRADED OPTICAL FIBRE IN THE SYSTEM P_2O_5--SiO_2
     梯度型P_2O_5-SiO_2系光纤折射率剖面控制的初步探讨
短句来源
     Interfere-metric measurement of nonlinear refractive index of ZF-7 glass
     用干涉法测量ZF-7玻璃非线性折射率n_2
短句来源
     A method to determine refractive index profiles for graded optical waveguides
     确定渐变型光波导折射率轮廓的一种方法
短句来源
     The determination of refractive index-profiles of glass waveguides formed by ion exchange
     离子交换玻璃波导折射率分布的确定
短句来源
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  refractive
The final results show that the new mini-spectrophotometer with micro-silicon-slit and micro-silicon-fixer is worked out, its correlation coefficient r >amp;gt; 0.999, and its refractive index resolving power is better than 0.01.
      
During scanning, AF/PSTM could get two optical images of refractive index image and transmissivity image, and two AFM images of topography image and phase image.
      
The refractive index profile is reconstructed using the reflectivity calculation method.
      
It is found that relatively large positive changes of extraordinary refractive indices happen in the guiding regions, and a slight change increases with the doses, which are different from most of the observed ion-implanted waveguides.
      
The primary shell consists of two 2.5-nm layers with the refractive indices of 1.50 and 1.45; the secondary shell, of two 2- and 3-nm layers with the refractive indices of 1.45 and 1.40.
      
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1. A simple method is presented for determining double bond index of pure unsaturated hydrocarbons, petroleum fractions and other hydrocarbon mixtures based on a correlation of observed refractive index, calculated refrac-tive index, molecular weight and the number of double bonds per molecule. The data neccessary are: (a) mid-boiling point, (b) refractive index at 20℃ for sodium D line, (c) density at 20℃ and (d) weight percent hydrogen of the

依据在20℃钠D线折光率实测值,在20℃钠D线折光率计算值,分子量及每一分子内所含双键数间之相互关系,推衍得一简易方法,用以测定纯不饱和烃及石油分馏油份之双键率(Double Bond Index).所需由实验测得之数据为试料之(甲)在20℃钠D线折光率,(乙)在20℃时之密度,(丙)中间沸点(Mid-boiling point),及(丁)含氢重量百分数.用本法测得双键率值,与用尼蒲金(Lipkin),圣金(Sankin)及马丁(Martin)三氏法测得双键率值适相吻合.因此,用本法所测得之双键率,足资用以鉴定石油分馏油份内所含芳香族烃及烯(?)烃之主要型式.惟需指明者,即在依据本法测得之双键率,用以鉴定石油分馏油份内所含不饱和烃之主要型式时,必须测定由石油分馏油份内提出仅含不饱和烃浓缩物之双键率.

When a suitable immersion medium, the refractive index of which is not far different from that of the fiber, is chosen and the wave length of light is adjusted to a certain particular value, it is possible to make the refractive index of the immersion medium and of the fiber exactly equal at this particular wave length. By means of an ordinary spectrophotometer with its optical system slightly modified, one can easily determine this particular wave length and consequently find the exact refractive...

When a suitable immersion medium, the refractive index of which is not far different from that of the fiber, is chosen and the wave length of light is adjusted to a certain particular value, it is possible to make the refractive index of the immersion medium and of the fiber exactly equal at this particular wave length. By means of an ordinary spectrophotometer with its optical system slightly modified, one can easily determine this particular wave length and consequently find the exact refractive index of the fiber for sodium light, if the dispersion curve of the immersion liquid and the so-called "λ-factors" of the fiber are known. To carry out the process, a series of immersion media of refractive indices differing by steps of 0.004-0.005 or smaller are required. In this work, the actual immersion media used are mixtures of dibutyl phthalate and tricresyl phosphate of varying composition for liquids of refractive indices ranging from 1.4920 to 1.5545. For higher refractive indices up to 1.5945, solutions of diphenylamine in tricresyl phosphate of varying concentrations are used. The dispersion curves of these liquids, as determined by means of a spectrometer, are shown in Fig. 5. The factors for cellulose fibers are listed in table Ⅰ. The modified optical system of the spectrophotometer is shown in Fig. 2. The presence of layers of parallel fibers immersed in a liquid in the cell C causes some of the incident light to be reflected back and a part of the transmitred light to be deviated from its straight path and hence intercepted by the slit S, placed in front of the photocell C_1. At a certain particular wave length of light, the refractive index of the fiber and of the liquid are the same; therefore the transmitted intensity as indicated by the photocurrent will be at its maximum. Some typical results of measurements are given in Fig. 7. From the value of this particular wave length corresponding to the transmission maximum, the refractive index n_λ can be found and thus corrected in to n_D by means of Table Ⅰ. The results for five different rayons are given in Table Ⅲ. The method is macroscopic, giving the mean refractive index of a fiber sample accurate to +0.0005 in a single determination.

选择一种浸剂,其折光指数与纤维的折光指数相差不远,并调整光波至某一特定波长,可使纤维与浸剂在这一特定波长时的折光指数恰巧相等。作者利用通常的光谱光度计,稍加修改,测得这一特定波长,从而求得纤维的正确折光指数。方法是宏观的,一次测定便可得试样的平均折光指数,精确度也容易达到±0.0005。

The chemical method of organic qualitive analysis is rather time consuming. This paper presents a simple method of identification, utilizing the data obtained chiefly from a few physical measurements. The method is also suitable for identifying new compounds and compounds whose derivation is unknown.Physical properties, such as density, refractive index, boiling point and viscosity are related to the molecular weight and to the chemical constitution of a molecule. The system presented, based on these correlations,...

The chemical method of organic qualitive analysis is rather time consuming. This paper presents a simple method of identification, utilizing the data obtained chiefly from a few physical measurements. The method is also suitable for identifying new compounds and compounds whose derivation is unknown.Physical properties, such as density, refractive index, boiling point and viscosity are related to the molecular weight and to the chemical constitution of a molecule. The system presented, based on these correlations, enables one to tell the kind as well as the number of functional groups, to detect the presence and the nature of a ring be it saturated or unsaturated, cyclic or heterocyclic, and to construct the empirical formula of the compound. With the empirical formula, and the kind and number of functional groups established, it is possible by the use of references, such as Beilstein and Chemical Abstracts, to list the physical properties of all possible known isomers. Often the detail structure of nknown can be reasonably ascertained by comparing the physical properties of the unknown with those of the known compounds.The method presented covers liquid substances containing carbon, hydrogen and oxygen only, but the same principle is applicable to those compounds containing sulfur, nitrogen, phosphorus and halogens.

本文提出一有机定性分析的简单方法,主要是根据几种物理常数。这法亦适用于鉴定新的或不知来源的化合物。物理性质,如密度、折射率、沸点及粘度,与分子量及化学结构有关。根据此关系可测定官能团的种类及数目;检验有无环;并求得化合物的实验式。知道实验式及官能团的种类、数目后,可从参考书中查出所有可能异构体的物理性质。比较未知物与已知物的物理性质后,通常即能推定未知物的结构式。本文所述方法只可用于含碳、氢及氧的液态化合物,但同样原理应可用于含硫、氮、磷及卤素的化合物。

 
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