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In the experiment,a He-Ne laser with waist of 0.6 mm is utilized to adjusting a plane-concave resonator with a concave mirror in a radius of 50 mm at measuring distance of 889 mm.

实验使用束腰为0.6 mm的氦氖光,其后加一优化好的透镜系统,在889 mm的距离下,对凹面镜曲率半径为50 mm的平凹腔进行对准。

Through the demonstration of the no-desire and selfless characteristics of ordinary people, we only discover the class nature which emasculate one′s personal desires in Jia Pingwas early works. Then through revealing the humanity shine in suffering characters we can find the distortion of human nature.

通过展现其初期创作里面普通人物身上无私无欲的个性特点,探析贾平凹早期小说中那种阉割了个人欲望的阶级性;又通过受难人物身上闪耀的人性光芒来揭示其人物塑造的失真。

When the LD incident power was 2.68 W, 2.7 mW and 24 mW free-running laser outputs at 731 nm have been obtained in the same plano-concave cavity, respectively. By using of 3.4 mm length laser rod, the overall efficiency of 1.4% and slope efficiency of 11.9% were gotten.

当激光二极管输入功率为2.68 W时,在平凹腔中祖母绿晶体分别实现了2.7 mW和24 mW的731 nm红外激光的自由输出,其中长度3.4 mm激光晶体的光-光转换效率为1.4%,斜率效率为11.9%,激光阈值在0.7 W附近,并分析讨论了效率低的原因。

In order to suppress the heat effect of blue laser using plano concave cavity when working ,use Thermal Energy Converter to cont rol the temperature of gain medium Nd : YAG crystal and SHG LBO crystal.

为了解决平凹腔蓝光固体激光器晶体在工作中因热效应问题产生的影响,针对激光的增益介质Nd:YAG晶体和用以倍频的LBO晶体,采用半导体制冷器准确控制其工作时的温度。

The study showed that not only the relative concentrate of light energy through coherent combination can be achieved,but also the dark region of light intensity, owing to coherent ,have been compensated by the contribution of output beam of plano-concave cavity at nearfield.

研究表明,在近场,不但可以获得由于相干而引起的光能相对集中,而且,中间平凹腔对光束的贡献补偿了相干引起的暗区的光强,整体提高了光强。

The high power diode end-pumped Q-switched Nd:YVO_4/KTP red laser was demonstrated by using a simple plano-concave cavity. At the repetition rate of 15kHz, the maximun average output power of 1.37W was attained, with the corresponding pulse width of 33ns.

采用简单的平凹腔结构以及KTP倍频晶体实现了全固态高功率Nd:YVO_4/KTP腔内倍频671nm红光输出,其最大平均输出功率为1.37W,相应的重复频率和脉冲宽度分别为15kHz和33ns。

Sessile spikelet flat, convex or concave across back; lower glume lanceolate to ovate, membranous to leathery, smooth, marginally 2-keeled or rounded; upper glume boat-shaped; lower floret male or barren, with or without palea; upper floret bisexual, with entire awnless lemma.

无梗小穗平,凸的或凹的直径背面;更下部的颖片披针形到卵形,膜质到革质,清除,稍微龙骨状或圆形;上面颖片舟状;更低的小花男性或者不孕,有或没有内稃;上面小花两性,具全缘外稃。

The family is characterized by a primitive protrogomorphous-sciurognathous zygomasseteric structure and pauciserial incisor enamel, but the cheek teeth are precocious in development of hypocone and hypolophid.

共 4属 6种。新科的特征是:始啮型头骨-松鼠型下颌;门齿釉质层散系;颊齿具有发育的次尖和下次脊,后期种类上颊齿的外侧齿尖的唇侧发展成平凹到新月形。

This thesis combines the wholesome and phasal characteristic and investigates the variability characteristic of his proses from three points.

本文将贾平凹散文的整体性特征和阶段性特点结合起来,分三条线索探究其散文创作的流变形态特征。

Jia clear that follow Kangs road he can reach the peak of literature and the big extent reached of art surely.

贾平凹明白自己跟川端康成有很多相似之处,走川端康成之路,一定能达到艺术的大境界、文学的高峰。

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