英文翻译

徐邓伟 2009-05-18 09:34:25 556 浏览

高手帮忙翻译下下面的文字，翻得好的会追加分数，请不要机翻研究光在生物组织中的传播特性是生物医用光学的重要内容。它在医学上的应用有重要的理论以及实际意义，既可以无损地探测组织的光学性质参数，又可以用来成像。而生物组织折射率是组织的重要光学... 高手帮忙翻译下下面的文字，翻得好的会追加分数，请不要机翻研究光在生物组织中的传播特性是生物医用光学的重要内容。它在医学上的应用有重要的理论以及实际意义，既可以无损地探测组织的光学性质参数，又可以用来成像。而生物组织折射率是组织的重要光学特性参数之一，这一数据的精确测量与否关系到生物组织光学众多研究的基础。本论文根据全反射原理，克服了组织的强散射问题，设计了一个由白光光源，光纤，透镜，单等腰直角棱镜，光谱仪等构成的测量装置，通过测量临界状态时，白光进入直角棱镜的入射角A，以及棱镜的折射率N，再由公式计算出生物组织的折射率。该实验的设计是使白光经棱镜散射，从中选取赤绿蓝三色不同波长的光进行测量。经过试验，所得生物组织折射率的数据资料基本与参考文献相同，用结果论证了该测量方法有效可行，为进一步完善生物组织光学的特性参数研究提供了又一方法。展开

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晁凡娜 2009-05-19 00:00:00

It's a very important content of biomedical optical to study the characteristics of light propagation in biological tissue. The application of the research in medical has great theoretical and pratical significance. It cannot only detect the optical property parameters scathelessly but also generate image. Refractive index of biological tissue is one of the important optical property prameters. The accurace of this data concerns the foundation of many optical research on biological tissue. According total reflection theory， this article overcome the strong scattering of biological tissue. A measuring instrument， which is constructed by white light source， fiber， lens， isosceles right-angle prism and spectrometer， is designed in this article. The incident angle A of white light entering right-angle prism and the refractive index N of prism were measured at critical state， then the refractive index of biological tissue can be calculated by formula. The design of the experiment is to measure the wave length of red， green and blue light that white light scattered from prism. The calculated refractive index of biological tissue is same as the reference. The result proved that the measurement is valid. A new method is presented to further research the characteristics of light propagation in biological tissue.

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英文翻译: Determination of the Illuminating Power of Chal-gas.—The value of coal-gas naturally depends chiefly on its .illuminating power. This can be determined in various ways. Of these， the most practically useful and easiest is the photometri... Determination of the Illuminating Power of Chal-gas.—The value of coal-gas naturally depends chiefly on its .illuminating power. This can be determined in various ways. Of these， the most practically useful and easiest is the photometric method， the amount of light emitted by a gas flame， burning at the rate of five cubic feet per hour， being compared with that given off by a standard sperm candle consuming 120 grains of sperm (7*79 grams) per hour. For this purpose， Btmsen's photometer， see Fig. 211， is employed. This depends upon the fact that the intensity of the illumination from a luminous point is inversely proportional to the square of the distance of the illuminated surface from that point. For flames- of coal-gas or candles， this law is of course only approximately true， but sufficiently so for practical purposes， and it， therefore， serves as the basis of a useful， though not very accurate， method of testing the illuminating power of coal-gas. All that is neces-* savy is to ascertain the distances at which the standard candle and the gas-flame both produce the same illuminating effect; it then only remains to take the squares of these distances in the inverse order to obtain the relative illuminating power of the two sources of the light. In Bunsen's photometer， the surface illuminated by the candle- and gas-flames， consists of a diaphragm of paper， Fig. 211， which， with the exception of a small circle in. the centre， Fig. 212， has been painted over with a solution of spermaceti in benzene， which renders the whole surface， with the exception of the central disc， transparent. This diaphragm is placed in a frame fixed to a moveable slide， which fits on to the long divided tod of the photometer (o'o)， Fig. 211. Over this frame is placed a black shade containing two pieces of mirror-plate ao fixed， that when the observer looks at the diaphragm in a direction at right angles to the divided rod， he sees in the two mirrors a reflection of each side of the waxed paper At the right hand extremity of the rod is fixed the standard candle， whilst at the other the gas flame is allowed to burn， the rate of its combustion being accurately determined by means of the experimental gas-meter (p). 展开

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