查询词典 ND

In the investigatedcomposition region,two ternary phase:Nd3(Fe1-xVx)29(x=0.066-0.095)and Nd(Fe1-xVx)12(x=0.125-0.167),one pseudobinary phase:Nd2(Fe1-xVx)17(x=0.000-0.066)areobserved at 1323K.

在1323K温度时观察到三个化合物，其中有两个三元化合物：Nd3(Fe1-xVx)29(x＝0.066-0.095)和Nd(Fe1-xVx)12(x＝0.125-0.167)，和一个二元化合物固溶体Nd2(Fe1-xVx)17(x＝0.00-0.067)。

By adopting Cr 4+∶YAG as saturable absorber,the Q switching operation of 1 06μm laser is realized in pulsive Nd∶YAG.

采用Cr4＋∶YAG 晶体作为可饱和吸收体，在脉冲式Nd∶YAG 中实现了1.06 μm 激光的调Q运转。

And influences of contamination on Sr isotope and LILEs are more evident than those on Nd isotope and REEs.

同化混染对Sr同位素和大离子亲石元素的影响程度大于对稀土元素和Nd同位素的影响程度。

Rhyolitic volcanic rocks are generally characterized by rich alkali, silicon, aluminum,and poor calcium, magnesium. They have relatively high Rb,Th and rather low Ba,Sr,Ti,P,and exhibit obviouslv negative europium anomaly (δEu=0.16~0.44).The εNd values of the rhyolitic volcanic rocks range from -5.93 to -2022.Basalts and rhyolites in different cycles show clear geochemical variance.

流纹质岩石总体具富碱、富硅、富铝，贫钙、贫镁特征，其Rb、Th等元素的含量较高，而Ba、Sr、Ti、P等元素含量则明显偏低，并具显著的铕负异常（εEu=0.16'0.44），岩石的εNd值变化于-5.93~~-2.22.I、II旋回玄武岩和流纹岩在地球化学特征上均具明显变异。

The result shows that there are not rich Nd phase and crystal-bound on the surface of rusted sintered NdFeB magnet after several minutes in the tap water. When dipped for an hour in the tap water, there are rubiginous spots, and after an hour, there are rubiginous holes.

结果发现，在自来水中浸泡数秒钟，样品表面的腐蚀就非常剧烈，金相照片中已经看不到富Nd像的存在，晶界亦不明显；时间延长至1h，样品表面会出现一定的锈斑；浸泡1d以上时，样品表面还会出现腐蚀坑。

There are two evolutional trends for sodic basalts: alkaline basalt to sub-alkaline basalt and to the contrary. The fact that alkaline basalt has the higher concentration of incompatible elements and the sub-alkaline lower indicates the increasing degree of the partial melting in the mantle sources. The variety of Sr, Nd isotope compositions in different types of rocks shows their different mantle sources.

钠质玄武岩存在着碱性玄武岩到亚碱性玄武岩和亚碱性玄武岩到碱性玄武岩的变化序列；碱性玄武岩到亚碱性玄武岩不相容元素丰度逐渐降低，表明为部分熔融程度逐渐增高的产物；Sr、Nd同位素组成与岩性之间的相关性表明，各种岩浆是不同地幔源区部分熔融的产物。

The Paleoproterozoic Beidahe Group-complex remains as continental shivers in the interior of the North Qilian orogen. In its early stage of development, there occurred abundant amphibolite. The protolith of the amphibolite is basalts. The Alk-∑FeO-MgO plot, REE features and Rittmann index show that the protolith belongs to the calc-alkaline suite and exceptionally shows the subalkaline character. The rock is characterized by higher Al2O3 and ∑FeO and lower Mg#, indicating that it has a higher degree of compositional evolution and that the formation of volcanic rocks is related to activation of older crust. Highly fractionated REE patterns and amphibolite on the Ti-Zr-Y plot, Ni-FeO/MgO plot and Ta/Yb-Th/Yb plot all indicate the characteristics of volcanic arcs and active continental margins. On the geochemical diagram of basalt, the overall REE features are in the main analogous to those of calc-alkaline island-arc basalt, with Sr87/Sr86=0.71617–0.72033,Nd143/Nd144=0.512414–0.512495 and εNd=–2.79 to –4.37,εSr=245.78–305.3, showing that the magma was derived from the crust or subjected to contamination with the lower crust below the continent.

提要：以大陆碎块形式残存于北祁连造山带内部的古元古代北大河岩群早期发育有大量的斜长角闪岩，其原岩为玄武岩，Alk—∑FeO—MgO图解，REE特征，里特曼组合指数等均显示斜长角闪岩属钙碱性系列范围，个别显示弱碱性，斜长角闪岩具有较高的Al2O3，∑FeO和低的Mg#，这些特点反映其成分演化程度较高，表明火山岩的形成与古老地壳的活化有关，有较强分异的稀土元素分配模式，在Ti—Zr—Y图，Ni—FeO/MgO图解和Ta/Yb—Th/Yb图解上斜长角闪岩均显示火山弧或活动大陆边缘的特点，在玄武岩的地球化学形式图，稀土元素整体特征与钙碱性岛弧玄武岩基本相同；87Sr/86Sr=0.716 17～0.720 33， 143Nd/144Nd=0.512 414～0.512 495，εNd=-2.79～-4.37。

Objective Observe the efficacy and safety of variable long-pulse frequency-doubled Nd:YAG laser at wavelength of 532 nm in the treatment of telangiectasia.

目的：观察Versapulse可调长脉宽倍频Nd：YAG 532nm激光（VPW532）治疗毛细血管扩张的疗效及安全性。

Gain medium is composited Nd:YAG crystal, the temperature of which is precisely controlled by thermoelectrically cooled.

采用复合Nd：YAG晶体作为增益介质，并利用半导体致冷器对激光晶体的温度进行精密控制。

For the propose of finding high energy mid-infrared laser output, a compound cavity kalium titanyl arsenate optical parametric oscillator pumped by an electro-optic Q-switched flash-lamp-pumped 1064nm Nd:YAG laser was experimentally studied.

为了得到高能量中红外激光输出，对电光调Q灯抽运1064nm Nd： YAG抽运复合腔砷酸钛氧钾光学参变振荡器作了实验研究，在工作频率1Hz时得到OPO输出单脉冲能量36mJ，信号光脉宽10ns，闲频光波长3407nm，能量11mJ。

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。