查询词典 Nd

Framing shadowgraphy of UV laser probing with the 4th harmonic Nd-YAG Laser was developed for the diagnosis of Z-pinch plasmas. This system can effectively shield visible light and has advantages of high temporal resolution,large optical angular aperture and wide measuring range.

采用Nd-YAG激光器的四倍频激光(266nm)设计了激光探针分幅阴影成像系统，该系统具有时间分辨率和收光效率高，测量范围大，可有效屏蔽可见光干扰的优点，在钨丝阵实验中成功获得晚期内爆等离子体的分布图像。

The refractive indices of Nd:GGG were measured by the absorption spectrum method and autocollimation method.

用吸收光谱法和自准直法测量了Nd：GGG的折射率，二者给出的折射率测量结果符合得很好，表明用晶体透射光谱来测量折射率是一种有效的简易测量方法。

According to the principle of A-O interaction and quartz＇s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd : YAG laser cavity between mirror and Q-switch, AO Q-switch＇s Bragg diffraction efficiency formula is put out theoretically.

结合声光相互作用理论和声光介质熔石英在平行和垂直于声场的两个方向具有不同声光优值的特性，理论推导了腔内引入四分之一波片后声光Q开关的布喇格衍射效率公式，计算模拟得出引入四分之一波片能够有效地提高声光Q开关关断连续Nd：YAG激光的能力。

METHODS: Thirty one patients with primary bronchogenic carcinoma were treated by Nd:YAG laser interventional technology for different times.

对 31例原发性支气管肺癌患者采用Nd ：YAG激光介入技术进行次数不等的支气管腔内治疗。

METHODS: Thirtyone patients with primary bronchogenic carcinoma were treated by Nd:YAG laser interventional technology for different times.

对31例原发性支气管肺癌患者采用Nd：YAG激光介入技术进行次数不等的支气管腔内治疗。

METHODS: Male Brown Norway rats were anesthetized to receive Nd:YAG laser to break the Bruch's membrane.

雄性Brown Norway大鼠，麻醉下行Nd：YAG激光击穿Bruch膜。

Objective To study the curative effect of pulsed Nd:YAG laser on early root-surface caries in senile patients.

目的 探讨Nd：YAG激光对老年人早期根面龋的治疗作用。

Objective: To investigate the effect of pulsed Nd:YAG laser with sodium-fluoride on artificial caries of human dentine and cementum in vitro.

目的 ：探讨脉冲Nd ：YAG激光结合氟化钠对离体人牙牙本质、牙骨质人工龋的影响。

At first, this age-dating approach was used to estimate the age of G-dwarf stars with Th/Nd chronometry. Recently, it has been used to evaluate the age of halo field stars and globular cluster stars with the Th/Eu and U/Th chronometers.

这种方法最初是利用元素对 Th/Nd 来确定 G 矮星的年龄，近年来开始利用元素对 Th/Eu 和 U/Th 来确定晕族场星和球状星团内恒星的年龄。

The thermal deformation of Nd∶YAG laser which side face is isothermal or constant coefficient of heat conduction was studied.

用有限元方法研究了端面抽运Nd∶YAG激光器中激光晶体的温度和端面热形变分布规律。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。