激光

By means of time-resolved laser-induced fluorescence spectroscopic technique, two samples of Er3+∶YAG with 10.5% and 8.4% concentrations were resonantly excited with ultraviolet lasers at 262 nm and 276 nm, and the fluorescence spectra were recorded and the peak transitions were assigned in detail.

利用时间分辨激光诱导荧光光谱技术，用262 nm和276 nm紫外激光对原子数分数为x(Er3+)=10.5%和x(Er3+)=8.4%两种情况下Er3+∶YAG晶体的4D5/2和2H9/2能级分别共振激发，记录了每种情况下的荧光发射谱，对其中所有荧光谱峰对应的能级跃迁做了详细标定。

When the 〓I〓 and 〓F〓 states of Er〓 were resonantly pumped by a laser diode at 808nm and a pulsed dye laser at 658nm respectively, we have observed two upconversion bands near 553nm and 413nm.

分别用波长为808和658nm的半导体激光和脉冲染料激光共振激发晶体中Er〓的〓I〓和〓F〓态观测到波长在553和410nm附近的上转换荧光发射。

The system utilized four laser scanners along lengthwise direction of the log. Data are obtained in every ten degrees when log is turning, in each cross section, 36 data are obtained. Then the data obtained were processed and an outline of the cross section of the log was developed on computer screen. Afterwards, the largest inscribed circles for log cross sections were determined according to the principle that three points can determine a circle. Secondly, the points located on the cross sections were linked up along some log generative in order to simulate the three-dimension log outline. At last the largest right circular cylinder were optimized and the optimum turning center was determined by means of projective theory.

具体作法是：在木段长度方向均匀设置四个激光传感器，当木段旋转时，起动激光传感器，进行数据采集，每隔10~0扫描一个点，在各横断面圆周上共采集36个点的数据，由计算机处理采集的数据，并绘制出原木横断面的几何图形，再根据三点定圆的原理，确定出最大内接圆；其次，模拟原木三维廓形，即将原木相邻横断面上离散点沿着母线方向连线，由计算机分析处理，绘制原木三维廓形；最后，采用投影法，优化出原木最大内接圆柱体，并确定原木回转中心线。

The results of roentgenogram in the He-Ne and CO2 laser irradiation groups were better than that in the control group both on the 15th and 35th days after fracture, and there was no significant difference between the two irradiation groups.

两个时间得到的X射线片的结果显示CO2激光及He-Ne激光照射组均优于对照组，两个照射组之间的差异无显著性。

Faraday rotatory glass has been used for modulating,deflecting of laser,optical switch and isolator.

旋光玻璃广泛用于激光的调制、偏转、开关和高功率激光系统的隔离器。

The relationship of variation rate between the scan light beam length after passing through the deflector and the fast voltage pulse wasderived.

导出激光束通过偏转器后扫描光线长度与加到偏转器上的快速电压脉冲变化率关系，并在实验中分别用MOS管和雪崩管高压电脉冲发生器取代价格昂贵的冷阴极管高压电脉冲发生器，获得激光脉冲宽度压缩约两个量级，且实现激光脉冲宽度可调。

It is confirmed that the treatment with laser is based mainly on photo-thermal interaction. And blood coagulation, vasoconstriction and vein occlusion are realized by the thermo scathe of blood and vascular with laser irradiation. Finally vascular diseases are cured.

论证了光热作用是激光治病的主要依据，激光通过照射病变血管，造成血管内的血液及血管壁的热损伤，从而达到血液的凝结，血管壁的收缩，血管闭合，实现了血管病变的治疗。

The numerical results show that the laser DSS of the moving spherical particle is tightly connected with its speed and scattering zenith angle.

结果表明：运动介质球粒子的激光雷达微分散射截面与粒子的速度和散射天顶角有关，当粒子做低速运动时，由于运动对粒子的激光散射产生的影响可以忽略。

The irritated sclera was observed by light microscopy and scanning electron microscopy.

应用光学显微镜和扫描电镜观察激光作用后巩膜的形态学变化，并用Nd：YAG激光作为对比。

The influence of NCl(a1Δ) self-annihilation on the energy extraction of NCl(a1Δ)/I laser at 300 K has been simulated using a simplified continuous flow Farby-Perot resonator model.

利用连续流平面型光腔动力学模型对NCl(a1Δ)/I激光体系进行了模拟计算，探讨了温度在300 K时NCl(a1Δ)自猝灭对NCl(a1Δ)/I激光能量提取的影响。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。