双晶的

The birefraction filter is also designed to get satisfying output-parameters. At last, the Ti:sapphire laser with flat-flat resonant cavity is pumped with the pumping source at 532nm. The pumping source is got from the frequency doubling of Nd:YAG laser.

对调谐元双折射滤光片进行了设计，采用厚度比为1：2：10的三片组合型双折射滤光片，最薄晶片厚度d 1 = 0.45mm，光轴与滤光片法线方向呈90度角，以使系统的输出参数达到预期的要求。

The results show that the flow stress decreases with increasing deforming temperature and increases with increasing strain rate. The flow stress of the alloy during hot compression deformation can be described by constitutive equation in hyperbolic sine function with a hot deformation activation energy of 196.27 kJ/mol. Partial recystallization takes place in the alloys deformed at a high temperature or at a low strain rate, and large number of dislocations and subgrains are observed in the alloy. The elongated grains observed in the samples coarsen with increasing temperature and decreasing strain rate. Correspondingly, the subgrain size increases and the dislocation density decreases. The main soften mechanism of the alloy transforms from dynamic recovery to dynamic recrystallization.

结果表明：Al-Cu-Mg-Ag耐热铝合金在热压缩变形中的流变应力随着温度的升高而减小，随着应变速率的增大而增大；该合金的热压缩变形流变应力行为可用双曲正弦形式的本构方程来描述，其变形激活能为196.27kJ/mol；在变形温度较高或应变速率较低的合金中发生部分再结晶，并且在合金组织中存在大量的位错和亚晶；随着温度的升高和应变速率的降低，合金中拉长的晶粒发生粗化，亚晶尺寸增大，位错密度减小，合金的主要软化机制逐步由动态回复转变为动态再结晶。

In view ofthe device application,the dispersive optical bistability of a superlatticeFabry-Perot etalon is more suitable.

从应用的角度来看，超晶格Fabry-Perot标准具的色散型光学双稳，更适合于光学双稳器件的要求。

According to capability of the circuit of DC motor, build the model of DC motor; designed the speed-current double closed loop system based on the model of DC motor; analyzed the method to solve the problem of discontinuousness of current.

二、根据直流电机回路，建立电动机的数学模型；针对该电动机模型，选用速度——电流双闭环控制系统，建立双闭环系统的控制方框图；分析晶闸管相控整流方式中出现电流断续现象的解决方法。

The results showed that MGM had good spherical shape and narrow size distribution,and the particles with diameters ranging from 0.13 mm to 0.28 mm were about 91 wt%.The surface hydrophilicity of Fe3O4 microcrystal was improved by formamide dispersing treatment.The gel particles made by the copolymerization of glycidyl methacrylate and N,N′-methylene bisacrylamide could encapsule Fe3O4 microcrystal to produce colloid cores,and uniform and stable MGM microspheres were formed by the conglomeration of the colloid cores.

结果表明，合成的MGM呈球形，且粒度分布较窄，粒径为0.13～0.28 mm的粒子占91%；甲酰胺分散Fe3O4，微晶表面的亲水性进一步增强，单体甲基丙烯酸缩水甘油酯和 N，N′亚甲基双丙烯酰胺交联共聚生成的胶粒能够包埋Fe3O4微晶形成胶核，胶核聚集形成均匀、稳定的MGM微球。

Genesee strives to establish its core product pipelines in antibodies and recombinant antigens to meet the needs of a wide variety of diagnostic techniques, such as latex agglutination assay, capture ELISA, double antigen ELISA, double antigen-mediated lateral flow immuno-chromatograph, chemoluminescence, multiplex microsphere assay.

公司致力于抗体和重组蛋白两种核心原材料产品的开发，以满足各种诊断技术的需求，如乳胶凝集试验法，间接法ELISA，双抗原ELISA，双抗原介导的胶体金快速诊断，化学发光法，蛋白液体晶片多重诊断技术。

A novel type of caged bicyclic phosphorous functionalized silsesquioxane was synthesized from caged bicyclic phosphorous quadridentate silicon complex in the presence of tetramethylammonium hy- droxide. The product was confirmed by FTIR, 29Si MAS NMR, MS and XRD spectra.

以双环笼状含磷四配位硅为前驱体，四甲基氢氧化铵为催化剂反应得到具有高度对称结构的双环笼状磷酸酯取代倍半硅氧烷，通过红外光谱，29Si固体核磁共振谱，质谱和X衍射光谱等手段确定了产物的结构和晶型。

The liquid crystal display has a chiral ferroelectric smectic liquid crystal between two transparent plates with electrodes for generating an electric field, and polarisers in front of and behind the liquid crystal, the ratio d/p of the thickness d of the liquid crystal layer to the pitch p of the helical twisting being larger than 5, the smectic tilt angle theta 0 being between 22.5 DEG and 50 DEG , and the product d.

一种液晶显示单元，它具有：一种在两块透明平板之间的手性铁电近晶液晶；用于产生电场的电极；在液晶前后各有一偏振片，液晶层的厚度d与螺距扭曲的螺距高度p的比值d／p大于5，近晶倾角θ 0 为22.5～50°，厚度d、倾角θ 0 的平方、双折射率△n和光波长λ倒数的乘积dθ 2 0 △n1/λ大于0.45μm。

For example, alkaline elements can affect diffusion velocity of Zr, Si and O ions although these alkaline elements cannot exist in crystal structure of zircon. However, K rich media and Na rich media exert different effects on the growth of crystal form: in the K rich media, growth speed of prism faces in the vertical direction is much higher than that of pyramid faces, and {111} growth speed in the vertical direction is higher than {311},which decides the formation of bipyramids dominated by {311} pyramids; in the Na rich media, both prism and pyramid grow to a certain extent, but the former is smaller than the latter.{100} growth speed in the vertical direction is lower than {110}, while {111} growth velocity in the vertical diredtion is lower than that of {311},resulting in the growth of the crystal form characterized by {100} short prism and {111} pyramid.

例如，尽管碱性元素并不进入锆石晶格，但它们可以影响Zr、Si、O离子的扩散速度，但是富钾和富钠的介质对锆石晶形发育的影响是有差别的，表现为：在富钾的介质中，将导致柱面的法向生长速度较锥面快得多，而锥面中，｛111｝的法向生长又较｛311｝快，由此决定了形成以｛311｝锥为主的双锥状晶体；在富钠的介质中，柱面和锥面都有一定程度的发育，但前者弱于后者，而柱面中，｛100｝的法向生长较｛110｝慢，由此决定了形成以｛100｝柱和｛111｝锥为主的短柱锥状晶体。

It is found that these two organic dopant TGS crystals have better figures of merit than that of.

系统地研究了有机双取代基TGS系列晶体的生长形态、晶胞参数、主要的介电、热释电和铁电性能参数等，发现这几种双有机取代基TGS晶体的品质因子有不同程度地提高。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。