查询词典 refraction

When it is 30°, the refraction angle of the target at the same altitude is only 0.98′ and the elevation orientation error is 1.19 m.

当视仰角为30°时，相同高度处目标物总偏折角仅

This paper investigates the effects of high temperature on ultrasonic velocity, refraction angle of inclined probe, ultrasonic attenuation, emitting strength of ultrasonic probe and defect detectable ratio, and provides practical methods of high temperature ultrasonic inspection for vessels and equipment, as well as concrete inspection procedure and key operational points.

文章通过研究高温对超声波声速、斜探头折射角、超声波衰减、探头发射超声波强度以及缺陷检出率的影响，提出了对容器设备进行高温超声波检测的方法、具体检测步骤和操作要点等。

A ray of light bends in such a way that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant.

入射角的正弦和折射角的正弦成正比。

In this paper, we investigate the light intensity-dependent superprism phenomenon in the two-dimensional Kerr nonlinear photonic crystal by nonlinear finite-difference time-domain technique. We show that when the intensity of the self-pumping beam is increased from 70 to 300 W/μm , the refraction angle of the beam can be tuned about 10 degree.

基于非线性时域有限差分法，我们模拟了克尔非线性光子晶体中的光敏超棱镜现象，结果发现，当光强变化230W/μm时，两束光在空间上能被分开10o，选取较大的基本功率将有助于提高其光强分辨率，。

Methods: Thirty children who are anisometropia were analyzed using ultrasonic, the refraction and the keratometry were also be taken.

对30例屈光参差儿童的双眼进行了超声生物测定检查，同时进行角膜曲率测量和验光。

Results In the 121 patients, 47 patients(39%) were accommodative failure, 66 patients(55%) were lag of accommodation checking with FCC, 53 patients (43.8%) were uncorrected presbyopia, 65 patients (53.7%) were break up time of tear film＜10s, 87 patients (71.8%) couldn't been corrected the refraction errors or the correction of refractive errors was unsatisfied, 24 patients(19.8%) were esophoria, 17 patients (14%) were exophoria, 8 patients (7%) were anisometropia.

结果 121例患者中，调节灵活性明显降低者47例，占39%；FCC检查调节滞后者66例，占55%；未矫正老视者53例，占43.8%；泪膜破裂时间＜10s者65例，占53.7%；屈光矫正不足或未予矫正者87例，占71.8%；内隐斜者24例，占19.8%；外隐斜者17例，占14%；屈光参差者8例，占7%。

When there is an angle between the anisotropic metamaterials' optical axis and the electromagneticwave propagation axis, anomalous omnidirectional total reflection and anomalous negative refraction are discovered at the interface.

当电磁波的传输轴和各向异性超常介质的光轴成任意夹角时，发现在界面处可以产生反常全向全反射和反常负折射现象。

In such a medium, the direction of the Poynting vector monochromatic plane wave is antiparallel to that of its phase velocity. Because of that, DNG displays some unusual electromagnetic properties such as backward-wave effect, negative refractive effect, perfect lens and a limit situation, zero index of refraction materials.

在这种材料中，单色均匀平面波的相速方向和坡印亭矢量方向是相反的，因此使双负材料表现出一系列反常的电磁特性如：回波效应、负折射效应、完美透镜效应和一种极限情况即零折射率材料等。

An arc of colored light in the sky caused by refraction of the sun's rays by rain .

雨后由于阳光的折射而引起的天空中的带有彩色光的拱。

Methods In 390 eyes of 197 cases with spherical equivalent refraction between -0.75~-16.25 D and astigmatic -0.25~-4.00 D, the relationship between the dioptre and parameters of topography was analyzed.

年龄 18~51 岁的197例392眼，等效球镜为-0 75~-16 25 D，散光度为-0 25~-4 00 D近视眼，对其屈光度及角膜地形图各参数的关系进行统计学分析。

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。