查询词典 ND

Based on the theory of thermal analysis,heat conduction equation of Nd:GdVO4 crystal slab double-side pumped by laser diode arrays was built.

以解析热分析理论为基础，建立了平板Nd：GdVO4晶体在激光二极管阵列双侧抽运时的导热微分方程。

Using a kind of new solution to sovle the heat conduction equation of the anisotropic medium,general solution expressions of the temperature field and the thermal distortion field of Nd∶YVO4 crystal with rectangular section were obtained.

利用各向异性介质热传导方程的半解析求解方法，得出了矩形截面Nd∶YVO4晶体的温度场、端面热形变场的通解表达式。

Little energy density and big facula of Nd: YAG laser was used to treat all the cases.

目的 评价低能量密度、大光斑Nd：YAG激光治疗黄褐斑的疗效。

Objective To evaluate the curative effect of little energy density and big facula of Nd: YAG laser in the treatment of melasma.

目的 评价低能量密度、大光斑Nd：YAG激光治疗黄褐斑的疗效。

High resolution Nd isotopic evolution can be acquired through studying foraminifera, fossil fish debris and FeMn oxides.

通过有孔虫壳体、鱼化石碎片和沉积物中FeMn氧化物组分可以进行高时间分辨率的古海水Nd同位素演化示踪。

A U like shape on the curve of fundamental mode waist in the active medium versus pump power, at different cavity lengths of the laser diode end pumped Nd:YVO 4 solid state lasers with a flat flat resonator structure, is analyzed by means of the transform circle approach.

运用谐振腔变换圆理论，详细分析了激光二极管抽运的Nd ：YVO4 平行平面腔固体激光器振荡光在晶体内的基模光斑半径随抽运功率变化的U形曲线。

Objectives: To study the therapeutic effects of Nd: YAG laser in treatment of pyogenic granuloma.

目的：观察Nd： YAG激光治疗化脓性肉芽肿的疗效。

In this paper, with 2-oxo-propionic acid salicyloyl hydrazone as a ligand, one calcium complex, three copper complexes and thirteen rare earth(RE=La, Ce, Pr, Nd, Sm, Eu. Gd, Tb, Dy, Er, Tin, Yb and Lu) complexes have been synthesized. The crystals of four complexes were obtained, and the crystal structures were determined by single crystal X ray diffraction. One of the crystals is calcium complex, the other are binary and trinary complexes of copper.

本文选用2-羰基丙酸水杨酰腙作为配体，在水中分别与钙、铜、稀土(RE=La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Er、Tm、Yb和Lu)的盐反应，共制得了17种未见文献报道的配合物，另外还培养了2-羰基丙酸水杨酰腙、咪唑与铜、钙的二元及三元配合物的四种单晶，对La-Gd的稀土的配合物进行了溶解热的测定，并用Gauss-98软件包对铜的配合物进行了有关量化计算。

It is shown that this kind of film a-CdSe has an excellent photoelectric characteristics of instaneous response to picosecond laser pulse by testing the responsive time of those detectors using ultrashort light train pulses emitting from a colliding pulse mode -locking Nd:YAG laser.

用对撞脉冲锁模Nd：YAG激光器产生的超短光脉冲序列对探测器的响应时间进行检测，结果表明a-CdSe薄膜对皮秒10~(-12秒级的超短光脉冲作用具有良好的瞬态响应光电特性，探讨a-CdSe薄膜快速弛豫过程的内在机理。

Effects of aging on interfacial reaction and joint strength of Sn-Zn-Bi-Nd/Cu were investigated.

研究了时效对Sn-Zn-Bi-Nd/Cu接头的界面反应和力学性能的影响。

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。