查询词典 refraction coefficient

Hence, based on acoustic potential function and boundary condition on solid interface, we get reflection coefficient and refraction coefficient of longitudinal wave and transverse wave on solid-solid interface, and provide approximate formula of the reflection coefficient and the refraction coefficient about the first critical angle of incidence. We analyze relation between the refraction coefficient and acoustic impedance.

为此，基于固体介质的声势函数和界面的边界条件，推导了固-固界面纵横波的反射系数和透射系数，以及第一临界角入射情况下反射系数和透射系数的近似公式，并且分析了透射系数与声阻抗之间的关系。

Using the nature of endocone refraction and external cone refraction and the corresponding position relation on the light wave plane, the expressions of the cone-apex angles of endocone refraction and external cone refraction are deduced.

以此为基础，借助内锥折射和外锥折射的性质及对应光波面上的位置关系，推导了内锥折射锥顶角和外锥折射锥项角的表达式。

On the special structure of the Lower Latitude Meridian Circle and the practice of determining astronomical refraction in Yunnan observatory,a new method for improving the correction accuracy of the atmo- spheric refraction delay is proposed:the determined data of the astronomical atmospheric refraction values with different azimuths are utilized to find the refractivity and the param- eters of mapping functions for modeling the atmospheric refraction delay correction,which changes with the observing stations and azimuths.

根据云南天文台低纬子午环的特殊结构，和测定大气折射的实践，提出了提高折射延迟改正精度的新方法，即：利用各观测站不同方位从天顶附近直到低地平高度角的天文大气折射实测数据，求解得到折射率差和映射函数的参数，从而建立随测站和随方位而异的大气折射延迟改正模型。

From the results of different coefficient and similar coefficient,Schima superbashowed high total mean different coefficient and low total mean similar coefficient;Castanopsis chinensis showed high total mean different coefficient and media totalmean similar coefficient;Cryptocarya chinensis showed low total mean differentcoefficient and high total mean similar coefficient.

从相异系数和相似系数的计算看，荷木总平均相异系数最大，总平均相似系数最小；锥栗总平均相异系数大，总平均相似系数居中；厚壳桂总平均相异系数最小，总平均相似系数最大。

Methods:(1) The two-sided ovary of female animal and the two-sided testicle of male animal were excised. After the XLGBC to treat 28 days, the estradiol and the teststerone of serum were checked;(2) With intramuscular injection the Hydrocortisone,the Yangxu animals was made. After the XLGBC to treat 10 days, the testicle coefficient,the spermathecal gland coefficient and the ovary coefficient were observed;(3) With ig the Thyroid tablets and the Reserpine, the Yinxu animal was made. After the XLGBC to treat 10 days, the testicle coefficient,the spermathecal gland coefficient and the ovary coefficient were observed.

（1）雌性动物摘除双侧卵巢，雄性动物摘除双侧睾丸，复制成去势动物模型后予仙灵骨葆胶囊治疗28天，检测血清雌二醇和血清睾酮；（2）肌注氢化可的松，复制成阳虚动物模型后予仙灵骨葆胶囊治疗10天，观测并计算动物的睾丸系数、精囊腺系数和卵巢系数；（3）灌胃甲状腺片和利血平，复制成阴虚动物模型后予仙灵骨葆胶囊治疗10天，观测并计算动物的睾丸系数、精囊腺系数和卵巢系数。

The reflection coefficient and refraction coefficient are also given; the analysis shows the versatility of the principle of least action ,Snell s law and Fresnell s law in the research on the left-handed material,and the negative refraction effect is explained.

研究了电磁波在左右手介质界面折射与反射的特性，给出了折射系数和反射系数，从另外一个方面探讨了最小作用量原理在左手材料中的适用性；从电动力学和最小作用量原理证明了Snell定律，验证了Snell定律在左手材料中的适用性，并且得到Fresnell公式在左右手材料中的一致性。

Based on the same atmosphere refraction coefficient of toward and return surveying, simultaneous subtending surveying data are used to inverse atmosphere refraction coefficient of the whole day, and to correct real-time surveying data, which helps to increase surveying efficiency and reliability.

以往返测大气折光系数相同为前提，利用这种同时对向观测高差数据反算统计出一天各时刻的大气折光系数均值，对实时的监测数据进行改正，提高了测量速度与可靠性。

By definition,for targets located in a spherically stratified lower atmosphere or ionosphere,this paper derives the residual error models［Formulae (14) and (20);(24) and (27);(57) and (59),(63) and (65)］ of elevation angle refraction errors,range refraction errors and range rate refraction errors corresponding to monopulse radar and trilateration radar.

提要 本文从定义出发，推导出目标在球面分层低层大气或电离层内仰角折射误差、距离折射误差和相应于单脉冲雷达与三站雷达的距离变化率折射误差的残差模型［式(14)与(20)；(24)与(27)；(57)与(59)，(63)与(65)］。

Critical angle of refraction - semi-circular cylindrical mobile light source, the incident angle change the size of refraction angle to change at this time, when the refraction angle = 90 degrees, which is critical at this time angle of incidence angle, the critical angle of water at 40 degrees large about anything mobile source of water in the water screen that is a reflection of light, a phenomenon that total reflection.

光折射的临界角定义：光折射角=90度时，入射角即为临界角，按二方法，将半导体激光光源去掉铁夹，吸附在右下角的铁板上入射光对准中心，即产生折射光线，沿半圆形柱面移动光源，改变入射角的大小，这时折射角也改变，当折射角=90度时，这时入射角即为临界角，水的临界角大的在40度左右，再做移动光源在水中的水屏即出现反射光线，这种现象称全反射。

For example, all previous theoretical predictions and experimental observations have been questioned by Valanju et,wherein the authors claim that the presence of dispersion prevents power transmitted at RHM-LHM interface from refracting at a negative angle, which means the refraction of group velocity n_g carrying the physics information isall along positive refraction, but "negative refractive material " means only the refraction of phase velocity np is negative.

涉及最多的是负折射现象在物理上的因果率，例如Valanju等人通过一些理论计算认为所谓的"负折射率材料"只是相速的折射率n_p可以是负的，而携带物理信号的群速度的折射率n_g永远是正的，由此引发了许多争议。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。