查询词典 alpha ray

These catalysts were evaluated by a liquid phase hydrogenation of crotonaldehyde to crotyl alcohol and characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy.

采用沉积－沉淀法制备了纳米Au/TiO2催化剂，以X射线衍射、透射电子显微镜、X射线光电子能谱等手段对催化剂进行了系统的表征，并考察了该催化剂在巴豆醛液相加氢制巴豆醇反应中的催化性能。

This paper investigated the true propagation paths of acoustic wave in two-dimensional temperature gradient field-single peaked symmetry and deflective respectively, using the two- dimensional acoustic ray tracing method of forward deploying triangle. Besides, a simulating calculation and analysis of this acoustic ray tracing algorithm in model temperature was given.

该文使用二维空间中的三角形前向展开方法，对二维温度梯度场中的声线轨迹进行追踪，并分别在具体的单峰对称温度场和单峰偏斜温度场模型中，对该声线追踪算法进行了仿真计算和分析。

The main contents included the optimization of x-ray laser characteristics, the applied experimental demonstrations of diagnosing plasma with the x-ray laser as a probe using Moir6 deflectometer and Mach-Zehnder interferometer, respectively.

内容包括类镍银X射线激光的饱和输出以及光束质量的优化、摩尔偏折法和M-Z干涉法诊断等离子体电子密度分布信息的实验演示等。

The main contents included the optimization of x-ray laser characteristics, the applied experimental demonstrations of diagnosing plasma with the x-ray laser as a probe using Moire deflectometer and Mach-Zehnder interferometer, respectively.

以主要成员身份参加莫尔偏折仪、M一Z干涉仪等诊断仪器的设计和调试工作；参与非等宽柱面透镜均匀线聚焦系统的设计工作：参与X射线光学元件的参数设计、实验标定等工作。

The crystal monochromator is a key device of the X-ray beamline. It uses crystals as dispersive elements to diffract and separate the synchrotron radiation, and provide X-ray monochmmatic light with a given energy bandwidth.

晶体单色仪是X射线光束线上的关键设备，它用晶体作为色散元件，衍射、分离具有连续光谱的同步辐射，向用户提供一定带宽的X射线单色光。

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。

BMD was measured and healing condition was evaluated by X-ray observation and Dual Energic X-ray Absorptionat weeks 4,8,12 and 16 after operation,respectively.

术后4，8，12，16周行X射线观察和双能X射线吸收仪测量骨密度，评价骨缺损修复情况。

Last year, Erick Hansen of Blu-ray Technologies set up an independent plant in Spokane, Washington, to manufacture disks in two high definition formats, Blu-ray and HD DVD.

汉森在华盛顿州的斯波坎市开设了一家独立的工厂，生产蓝光和高清影碟两种格式的高清晰度光盘。

With the developing of science and technology, the corresponding optical components are required exigently, which work at hard X-ray radiation, for extend the applying range of X-ray optical component.

随着科学技术发展的需要，人们迫切需要在硬X射线波段建立相应的光学元件，拓展X射线光学元件的应用范围。

In view of the facts that traditional graphical construction has less pertinence to stray light and tracing different incidence angle rays is fatiguesome and more likely to omit some rays, we proposed a reverse ray-trace method based on the ray reversibility. According to the method, a dot-matrix source was set at the image plane. Each dot emitted rays to fully cover the system aperture. A detector surface, large enough to receive all possible rays from the source, was set at object plane.

针对传统作图法设计遮光罩的针对性不强，且追迹不同入射角的光线繁琐、容易遗漏的问题，本文提出一种逆向追迹法，依据光的可逆性，在像面处设置点阵面光源，每一点都发出充满系统孔径的光束，在物面设置足够大的探测面，使之有充足的余量记录所有到达物方的光线，利用该方法可以在探测面上直观地区分出非成像杂散光。

I want to be a big fish in a small pond.

我要做一条在小池塘里的大鱼。

While the software functioned well, we did not feel the same about their customer support!

虽然该软件运行良好，我们没有同样的感觉他们的客户支持！