查询词典 ND

A first order quasi phase matched periodically poled LiNbO 3 for SHG with 6.5 μm period, 12 mm length, 10 mm width and 0.5 mm thickness has been successfully fabricated by applying an external electric field at room temperature from an high pulsed voltage generator. About 18 mW of CW 0.532 μm green light was obtained pumped by an 1.1 W of CW 1.064 μm Nd∶YAG laser with end coupling, which corresponds to 1.6% power conversion efficiency.

通过高压脉冲电场极化，制备了周期为6.5 μm、长为12 mm、宽为10 mm、厚为0.5 mm的一阶准相位匹配周期性极化铌酸锂；由1.1 W连续1.06 μm Nd：YAG激光器抽运，在5°时产生了约18 mW、0.532 μm的倍频连续绿光，其对应的二次谐波转换效率约为1.6%，二次谐波的归一化转换效率约为1.5% cm-1W-1，相当于79%的周期性极化铌酸锂的理想非线性系数。

The main two cycles of the Xiangshan volcanic rocks and subsequent subvolcanic rocks have low ε〓 value (-7.46～-9.40), high initial 〓Sr/〓Sr ratio (0.70801～0.71201), old Nd model ages (1.54～1.70Ga) and relatively riched in radiogenic Pb.

相山两旋回火山岩及火山期后的次火山岩具有较低的ε〓值(-7.46～-9.40)、较高的I〓值(0.70801～0.71201)和较古老的Nd模式年龄(1.54～1.70Ga)，且相对富集放射成因铅。

We have used the ICE-AES instrument produced by Jobin Yvon company and selected suited testing condition. In allusion to the spectral interference of coexist elements in titanium alloys to the analytical lines of Y, Nd, suited analytical lines were selected and reclaimant and precision experiments were achieved.

采用法国Jobin Yvon公司的ICP发射光谱仪并选择了适宜的测试条件，针对钛合金中共存元素对Y、Nd分析谱线的光谱干扰选择了合适的分析谱线并进行了回收实验和精密度实验。

The formation mechanism of {111}//ND recrystallization texture was analyzed.

对{111}//ND再结晶织构的形成机理进行了分析。

With the method of orthogonal experiment, nine kinds of Mg-Nd-Gd-Zn-Zr magnesium alloys with different composition were prepared by sand casting.

中文摘要：采用正交试验方法，通过砂型铸造制备9种不同成分的Mg-Nd-Gd-Zn-Zr系镁合金。

Pulsed Nd:YAG laser ; sodium fluoride ; enamel ; scanning electron microscope ; electron probe microanalyzer

脉冲Nd：YAG激光；氟化钠；牙釉质；扫描电镜；电子探针

The microstructure, the spectral property and the laser performance of the prepared Nd:YAG ceramic were studied.

研究了室温下Nd：YAG透明陶瓷的显微结构、光谱及激光性能。

The LIBS system was mainly made up of a pulsed Nd: YAG laser with an operating wavelength of 1064 nm, a sample stage and a miniature spectrometer with a spectral resolution of 0.1 nm. LIBS signals collected by the spectrometer were spectrally resolved and processed by a computer.

由波长为1064 nm的Nd： YAG脉冲激光器，样品台和分辨率为0.1 nm的微光谱仪等器件组成一个小型激光诱导击穿光谱实验系统，通过计算机对光谱仪采集到的数据进行分析和处理。

To research the relation of oil's laser induced fluorescence intensity and oil temperature, the third(355nm) harmonics pulsed Nd: YAG laser was used as the exciting source, and a multi-track spectrology as the detector, and the intensities of laser induced fluorescence of oil under different temperatures were measured.

研究一种应用较广的油的激光诱导荧光强度与其本身温度之间的关系。用输出波长为355nm的三倍频Nd：YAG激光器做激发光源，用多通道光谱分析仪进行接收探测。

Trace element ; Sr- Nd isotope ; alkali syenite ; geodynamics ; Guangdong Province

微量元素； Sr-Nd同位素；碱性正长岩；地球动力学；广东省

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。