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In addition, molecular orientation behaviors induced by shearing, electric field and magnetic field were investigated. The space group of the monomers A3EO7 and A9EO7 were determined as P2〓2〓2 and P112/m by means of electron diffraction and X-ray diffraction. Liquid crystalline properties of the monomer and the polymer were studied using DSC, variable X-ray diffraction, TEM and polarized optical microscope. Both monomers exhibit monotropic liquid crystalline behavior, and they also give a metastable phase on the cooling process. The polymer PA9EO7 shows enantiotropic liquid crystalline properties. Thus the rigid polymer backbone is not a fatal defect that completely distorts the packing arrangement of the mesogenic moiety in the side chain liquid crystalline polyacetylene.

结合电子衍射倾转方法和粉末X射线衍射技术，确定了两个液晶小分子A3EO7和A9EO7的晶胞参数和空间群，采用Cerius〓模拟软件，运用分子模拟的方法给出了小分子在晶胞中的排列方式；利用DSC、变温X射线衍射技术和透射电子显微镜研究了小分子和聚合物的液晶态，单体A3EO7和A9EO7表现出单向液晶性质，并且在降温过程中都表现出一个亚稳液晶相或亚稳结晶相，聚合物PA9EO7具有双向液晶性；采用偏光显微镜和X射线平板照相技术，研究了剪切和电场对聚合物分子取向的影响，在不同的液晶态，剪切作用对聚合物PA9EO7具有不同的诱导取向结果，直流电场可以诱导聚合物联苯液晶基元沿施加电场方向取向。

The present paper describes the effect of the ethine absorbed and solved in the liquid oxygen on the liquid oxygen in the main condenser-evaporator since revamp of the air separation unit with liquid air and liquid oxygen absorber into the air separation unit with molecular absorber as well as measurement of the ethine content.

阐述空分设备由一般的液态空气吸附器和液态氧吸附器改造为分子筛吸附器后，吸附溶解在液态氧中的乙炔对主冷液态氧的影响程度及乙炔含量的检测。

Differential scanning calorimetry and polarizing microscope were used to study their liquid properties. Among them, nine are found to exhibit liquid crystal properties, and most of them displayed as heating monotropic liquid crystals. There are one or two mesophases and certain phase transition temperature,Δ H and temperature range of liquid crystal.

用差示扫描量热仪和偏光显微镜研究了其液晶性，发现其中九个配合物具有液晶性，多为升温单变液晶，有一至两个中介相，有确定的相转变温度、热焓和相变区间。

To master the liquid helium transfer method correctly is of a great important sig-nificance in economy for reduction of the liquid helium precool amount, full use of the liquidhelium cool amount and increase of the transfer efficiency of liquid helium In this paper the construction and use demands of the liquid helium transfer tubes,liquidhelium precool and transfer methods are presented.

正确掌握液氦输送方法，对减少液氦预冷量、充分利用氦气冷量和提高液氦输送效率有着十分重要的经济意义。

The results showed that PPC was a thermotropic liquid crystal and displayed the cholesteric banded texture. The reaction conditions had the distinct effects on the propoxy content and liquid crystal property of PPC, with the reaction temperature and content of propionyl chloride increased, the degree of substitution of propoxy increased at the beginning, then trended to steady. The transition temperature and range of liquid crystalline phase were changed with the DS of propoxy, as the DS of propoxy increased, the melt point decreased, and the liquid crystalline phase transition temperature range of PPC get wider.

结果表明，产物PPC具有明显的热致液晶性能，且呈现出胆甾型液晶的彩色条纹织构；反应条件对产物丙酰基含量和液晶性能有显著影响，随反应温度提高和丙酰氯用量增加，产物丙酰基的取代度先增大，后趋于稳定；其相转变温度和温域随丙酰基取代度改变而相应变化，随丙酰基的取代度增大，产物的熔点降低，液晶温度范围变宽。

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。

Based on the laser longitudinal mode splitting theory, a novel scheme of dual-frequency laser with large frequency-difference is presented using electrically controlled birefringence of liquid crystal, and the transmitted resonant mode splitting by birefringent of Fabry-Perot etalon has been analyzed theoretically. A new element of liquid crystal Fabry-Perot etalon is designed and fabricated, which serves as aselector and splitter of both laser longitudinal modes and Fabry-Perot etalons transmitted resonant modes. Two different experimental systems of laser-diode end-pumped Nd:YAG laser have been set up using two different LDs, and the transmission of liquid-crystal cell have been measured. When the empty LCFP is inserted in the cavity of high-power LD pumped Nd:YAG laser, the oscillation of a single laser longitudinal mode have been observed, such a result shows that the designed and fabricated LCFP element is capable of selecting single axial mode. While an anti-reflected liquid crystal cell is inserted in the cavity of Nd:YAG laser end-pumped by the high-power LD, it is difficult to confirm weather the laser longitudinal modes have been spitted or not. The subject is summarized in this thesis and the improvement of the project has been presented.

论文以激光纵模的分裂理论为基础，提出了可望获得几十GHz甚至上百GHz的液晶电控双折射双频Nd：YAG激光器的总体方案，并对用双折射效应分裂F-P标准具透射谐振模进行了理论分析；设计并加工了一种集激光纵模选择、激光纵模分裂和F-P标准具谐振透射模分裂于一体的多功能元件——液晶电控双折射F-P标准具；建立了两种不同功率激光二极管端面泵浦的Nd：YAG激光实验系统，并对液晶盒的透射性质进行了测试；将未灌注液晶的空液晶F-P摘要标准具插入大功率LD泵浦Nd：、叭G激光谐振腔内，观察到了单纵模激光输出，说明所设计和加工的液晶F一P标准具具有纵模选择能力；将镀有增透膜的液晶盒插入大功率LD泵浦Nd八7AG激光谐振腔内，是否产生了激光纵模分裂现象还难以确定。

It make a gas and impurities in steel liquid to float after steel liquid be stirred in refining ladle and uniformize the temperature and the chemical composition of steel liquid, improving the purity and quality of steel liquid.

经钢包底部吹氩搅拌，使钢中气体和夹杂物充分上浮，并使钢液的温度及化学成份均匀，提高钢水的纯净度，明显改善钢的质量。

Methods test 1 256 samples from suspect uu or ct sufferers and infertile patients during 2007.results the positive rate of uu of 149 samples of prostate liquid is 42.3%(63/149), and the positive rate of ct of 136 samples of prostate liquid s is 19.9%(27/136);the positive rate of uu of 361samples of the secretion of the urinous tract is 21.1%(76/361),and the positive rate of ct of 346 samples of the secretion of the urinous tract is 10.4%(36/346);the positive rate of uu of 141 samples of semen is 11.3%(16/141),and the positive rate of ct of 123 samples of semen is 7.3%(9/123).conclusion there are significant differences in positive rate of uu and ct of 3 types of samples p.005.the positive rate of specimens of postate liquid is higher than that of the secretion of the urinous tract ,the positive rate of semen test is the lowest..the results from the uu and ct test of different types of specimens are different obviously .the most suitable specimen of test is prostate liquid.

对2007年1 256例怀疑感染uu或ct的患者和不孕不育症患者标本检测。结果：149例前列腺标本中uu阳性率为42.3%(63/149)、136例前列腺标本ct阳性率为19.9%(27/136)；361例尿道分泌物uu阳性率为21.1%(76/361)、346例尿道分泌物ct阳性率为10.4%(36/346)；141例精液uu阳性率为11.3%(16/141)、123例精液ct阳性率为7.3%(9/123)。结论：三种标本的uu、ct阳性率相差显著，p.005。前列腺标本检测的阳性率明显高于尿道分泌物标本，精液检测的阳性率最低。不同类型的标本检测的uu、ct的结果有很大的差异，送检的标本最好是前列腺液。

At the same time liquid of raw material is sent to centrifugal atomizer at the top of dry chamber pumped by pump through filter. In which liquid of raw material atomizes small drops. Air and liquid of raw material flow and contact each other fully. The moisture vaporizes rapidly. Liquid of raw material is dried into finished product in a short time.

料液由料液槽经过滤器由泵送至干燥器顶部的离心雾化器，使料液喷成极小的物状液滴，料液和热空气并流接触，水份迅速蒸发，在极短的时间内干燥为成品。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。