查询词典 diffraction

Nanostructured ZnO films with grain size of 28～35 nm have been prepared on quartz glass substrates by pulse laser ablation of Zn target in oxygen atmosphere. The structural and optical properties of the films were studied. ZnO thin films with typical c-axis (002) orientation were successfully deposited at a range of 100～250 ℃. The results obtained by X-ray diffraction and photoluminescence measurements show that the strong UV emission centering is about 378～385 nm and deep-level emission centering about 518～558 nm in the room temperature PL spectra of the ZnO films.

利用脉冲激光沉积法在氧气氛中烧蚀锌靶制备了纳米晶氧化锌薄膜，衬底为石英玻璃，晶粒尺寸约为28～35 nm.X射线衍射结果和光致发光光谱的测量表明，当衬底温度在100～250 ℃范围内时，所获得的ZnO薄膜具有c轴的择优取向，所有样品的强紫外发射中心均在378～385 nm范围内，深能级发射中心约518～558 nm，衬底温度为200 ℃时，得到了单一的紫外光发射。

From these simulation results, we analyze and discuss the influence of cavity boundary on Q factors of WG modes. Since there is scale size limitation due to diffraction limitation in microdisk, we also propose a novel design of photonic crystal circular-shaped (CD2) microcavity with well-sustained WG mode. We will apply the same optimization method on this microcavity named photonic crystal microflower CD2 (MFCD2) microcavity. And then this design is realized by a series fabrication processes and the measurement results will be analyzed and discussed.

由於微碟型共振腔在优化会有体积上的限制，故我们在这部分也提出一具有耳语廊模态之光子晶体修正共振腔，我们以相同的讨论结果作基础，将Q值最佳化的对象换成在小体积时也能有良好Q值表现的光子晶体，成为花型拓朴光子晶体共振腔(Photonic Crystal Micro-Flower CD2 Microcavity， PC MFCD2)，接著藉由制程方法实现该设计，并讨论其量测结果。

A diffraction lens used in millimeter wave focal imaging system was designed in this paper.

本文分析设计了一种用于毫米波焦面阵成像的衍射透镜。

This research first by Pozzolanic activity index test for water-quenched slag from plasma was used as water-quenched slag concrete basis of the mechanical properties. The experimental project includes: basic mechanical properties experiment, optics microscopy examination, X-ray diffraction, and freeze-thaw test.

本研究首先以水淬熔岩卜作岚之活性指数反应作为水淬熔岩混凝土力学性质之依据，试验项目包括：基本力学性质试验、OM检测、X光绕射分析及冻融循环耐久性试验。

The vanadium oxide films were characterized by X-ray diffraction and X-ray photoelectron spectra . It is found that the formation of vanadium oxide films was affected by substrate temperature and annealing time, because high substrate temperature and annealing were favorable to further oxidation.

采用X-射线衍射和X-射线光电子能谱对钒氧化物进行了表征，发现钒氧化物薄膜的形成受衬底温度和退火时间的影响，因为衬底温度以及退火有利于进一步氧化。

Following are stating the diffraction theory, CCD principle and its relation with the uncertainty .

以下说明广的衍射原理，CCD原理以及测不准关系。

A conventional two-circle diffraction system is set up. The work includes the design of light route, the establishment of control system for step motor and data collection, and the adjustment of the facility. A number of multilayers are measured using the diffractometer and a lot of useful experimental data are obtained.

作者在一台12KW转靶X光机的基础上，从光路设计到步进马达、数据采集等一套控制系统的建立，搭置了一台二圆衍射系统，并利用它做了大量的多层膜样品测量工作，并取得了一批有用的实验数据。

An AB_5-typed hydrogen storage alloy, La_(0.65)Ce_(0.28)Pr_(0.02)Nd_(0.05)Ni_(3.8)Co_(0.7)Mn_(0.3)Al_(0.2)MIB_(5.0, was prepared by twin-roller rapid quenching technology. It was thenmodified with transitional metal oxides of Cr_2O_3, V_2O_5, ZnO, NiO and MnO_2 by ballmilling, respectively. The physical and chemical performances of modified alloyswere studied by X-ray diffraction, scanning electron microscopy,electrochemical impedance spectroscopy, galvanostatic cyclic, and cyclicvoltammetry.

采用双辊淬冷技术制备了AB_5合金La_(0.65)Ce_(0.28)Pr_(0.02)Nd_(0.05)Ni_(3.8)Co_(0.7)Mn_(0.3)Al_(0.2)，用V_2O_5、Cr_2O_3、Cu_2O、Fe_2O_3、MnO_2等不同的过渡金属氧化物对该贮氢合金进行表面球磨改性，用XRD、SEM、EIS、恒电流充放电、循环伏安等方法研究改性前后合金晶体结构，充放电性能等。

Field emission scanning electron microscope, X-ray diffraction and poresizer indicate the nanotubes are formed due to the competition of tin monoxide formation and dissolution under the assistance of electric field. The formation mechanism of nanotubes agrees with the theoretic model of oxidation-dissolution.

经场发射扫描电镜、X射线衍射和孔径分析仪分析显示，阳极氧化的前聚体是氧化亚锡，通过在空气中加热转化为二氧化锡，在详细研究制备条件和氧化锡孔道形貌的基础上，提出了氧化锡纳米孔的生成机理符合氧化溶解理论模型。

Mesoporous tin oxide was synthesized by using cetyltrimethyl ammonium bromide or CTAB and Tween-20 as the template or hydrothermal process. Hollow tin dioxide micospheres were synthesized by using resorcinol-formaldehyde gel as the template or hydrothermal process. Thermogravimetric analysis, X-ray diffraction and electron microscopy have been used to characterize the materials.

本文分别采用十六烷基三甲基溴化铵模板法、CTAB和吐温20复合模板法及水热法来合成介孔氧化锡；用间苯二酚和甲醛凝胶模板法及水热法合成空心球氧化锡，并用热分析、X射线衍射、电镜等对以上材料作了形貌及结构表征。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。