查询词典 diffraction disc

The phase constitution and structure of a partially stabilized Zirconia with yttria and magnesia have been investigated by means of electron diffraction, diffraction contrast image, X-ray diffraction and image simulation.

通过透射电子显微术、X射线衍射和电子计算机图像模拟等手段、对由Y〓O〓和MgO复合稳定的ZrO〓陶瓷—-PSZ的相组成和相结构进行了观察测定。在此基础上，对电子衍射谱中的漫散射现象进行了系统、细致的研究。

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。

Due to the numerical aperture of DVD pickup is large, and the characteristic size is small, the error of scalar diffraction theory is very large. The in-depth research work on vector diffraction of optical disc was carried out. The optical disk model was analyzed use the rigorous coupled wave theory, and some significative conclusion was obtained. These conclusions can use for guidance of scheme designing of optical pickup.

针对DVD读取头光学系统数值孔径大，光盘特征尺寸小，标量衍射理论误差大等缺点，采用矢量衍射理论对光盘的衍射进行了深入的研究，首次在光学读取头领域中将耦合波理论应用到光盘的衍射分析中，得到了一些有意义的结果，这些结果可以用来指导光学读取头方案的设计。

When the moment made by material on turning plate is greater than that of heavy hammer and rocker, the disc will open adown to discharge. After discharge the moment made by heavy hammer and rocker will drive disc close quickly to realize locking air. Because the structure of valve is two-layer, there is always one disc in pipe that is in close condition. So it can discharges and lock air at the same time.

即当作用于翻板上的物料产生的力矩大于重锤摇杆产生的力矩时，阀板打开卸灰，一旦积灰卸去后，重锤与摇杆产生的力矩使阀板迅速关闭，实现锁气是由于本阀采用的是双层结构，因而使管道上阀板始终有一个是关闭状态，可使卸灰与锁气同时达到目的。

Selected anastomosis site:The site for the attempt at anastomosis creation was chosen at least 2-3 disc diametersaway from the optic disc or 1 disc diameter peripheral to the occlusion site in eyes with bruch retinal vein occlusion, and a large underlying choroidal vein by showing in ICGA, usually in the inferior fundus.

激光吻合：在选定的吻合部位，用选定的高能量激光先击射邻近的＊＿Ch膜，接着是静脉壁本身，Bruch膜破裂的疑似迹象，为一汽化泡，当静脉壁破坏时有微量的出血。37例RVO共做了86个吻合点，所用的激光参数为：光斑直径50p，曝光时间 0.l秒，使用绿光最多 63个点（72％），功率 800～900mw，少数用氟红、氟黄及Nd：YAG激光。

Methods: Forty-five SD rats were divided equally into SMT group, cervical intervertebral disc cataplasia model group and normal control group. Three months later, the morphologic changes of intervertebral disc were observed to determine the proteoglycan contents and the apoptosis rate of the intervertebral disc cells.

选取8月龄雌性SD大鼠45只，随机分为实验组、实验对照组和正常对照组，实验组和实验对照组分别造颈椎静动力平衡失调模型，实验组腹腔注射SMT.3个月后光镜下观察椎间盘形态，测定蛋白多糖含量及椎间盘细胞凋亡率，并比较。

In co-revolution disc cavity, heat transfer coefficient which is high on most region of disc surface show that the co-revolution avails the heat transfer on disc surface.

但在出口处出现大面积"倒流"，盘腔外端的温度较高，这与流动参数和出口面积的大小有关，有待进一步研究。

Disc assembly. Disc is fastened securely to disc hanger with a lock nut and cotter pin.

阀瓣总成。通过一个锁紧螺母和开口销将阀瓣安全紧固在阀瓣支架上。

The results indicated that the centrifugal force reduces the localization; when the Young's modulus of all blades are in the tolerance of 5%, the blade-disc can regarded as an cyclic symmetry system. The study results given in the present paper have provided a variety of effective numerical methods for the study of vibration characteristics of blade, disc and the blade-disc system. These research results can also serve as a helpful guide to the vibration study of other rotating components.

本文的研究成果为汽轮机关键部件叶片—轮盘系统的振动特性研究提供了一些有效的数值方法，得到了一些结论，对工程具有较大的现实意义，同时对其他叶轮机械旋转部件的振动研究也有参考价值。

After finished the drawbar spring disc alignment then fix the spring disc stopper, and turn in let the spring disc total length to the standard length (114pcs about 277mm), then the drawbar top fix the M16x1.5 nut.

连接杆弹簧圆盘调整成一直线，然后固定弹簧圆盘的止动块，使之总长为标准长度（114个约277mm），再在连接杆顶部固定M16x1.5的螺母。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。