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By means of scanning electron microscopy , transmission electron microscopy and X-ray diffraction techniques, microstructure of spray-deposited hypereutectic Al-Si alloy was analyzed.

本文以过共晶Al-Si合金为研究对象，在对喷射沉积合金凝固过程分析的基础上，重点研究了合金的微观组织与力学行为，讨论了后续热挤压和热处理对喷射沉积合金微观组织和力学性能的影响。

The results of XRD (X-ray diffraction), SEM show that the Al-Cu-Fe quasicrystalline coating is dense and uniform, by preparing from Al70Cu20Fe10 powders with particle size of 325 mesh (4.5μm). After annealing under vacuum condition of 800℃ for 2 hours, it is observed that the icosahedron phase is the major phase together with a few β-Al phase.

由X-射线衍射XRD(X-Ray Diffraction)、扫描电镜SEM分析得出：采用原子比为A170Cu20Fe10、粒度为-325目的粉末制备的涂层，在800℃下真空退火处理2h后，结构均匀致密，二十面体准晶相含量高，并只含有少量的β相。

The reflection effect of the spherical surface of a hemisphere solid immersion lens has been investigated using the vectorial diffraction theory for high numerical aperture systems.

应用高数值孔径系统的矢量衍射理论研究了半球形固体浸没透镜球面表面的反射对SIL系统透射场的影响。

For near-field recording systems, Aperture and Solid Immersion Lens are two popular techniques to overcome light diffraction limit and reduce spot size.

在近场光学纪录系统中，微孔与固态浸没透镜为常被用来克服光学绕射极以及限缩小光点的两项技术。

For near-field optical systems, Aperture and Solid Immersion Lens that are popular techniques can overcome light diffraction limit and reduce spot size.

奈米孔与固态浸没透镜是在近场光学系统中，常用来克服绕射极限和缩小光记录点的两项技术。

Infrasound (0.0001-20Hz) is acoustic energy with characters of little attenuation and long distance during radiation, inaudibility, diffraction and resonance in some parameters.

次声波是频率为0.0001Hz-20Hz的声波，具有传播衰减小、传播距离远、易于衍射、一般听不到、达到一定参数可引发共振等特点。

Themain contents of this dissertation are as follows:(1) The quality analytiedal results of chitosan are as follows: water for 15.205%;degree of deacetylation 92.671%; the weight average relative molecular weight ofchitosan 195900; the viscosity average relative molecular weight of chitosan 194100;and the decomposing temperature 298℃. The infrared ray IR spectra of chitosanshows that the feature-absorbing band of chitosan amido was 1601cm~(-1), that ofβ-indican bond was 986cm~(-1). The results of the X-ray diffraction of chitosan indicatesthat its degree of deacetylation and degree of crystal are both big.

本文的主要内容如下：(1)对壳聚糖的质量进行分析，其水份为15.205％，脱乙酰度为92.671％，重均分子量为195900，黏均分子量为194100，分解温度为298℃，壳聚糖的红外光谱表明，壳聚糖—NH_2的特征吸收峰为1601cm~(-1)，β-糖苷键的特征吸收峰为986cm~(-1)，壳聚糖的X-衍射图表明壳聚糖原料的脱乙酰度和结晶度均较大。

The diffraction attenuation of infinite thin sound barriers to point sources are calculated,and the influences of Sound source and receiver positions,noise frequency and reflection from the ground are ana- lyzed.

数值模拟方法主要借助于计算机计算，不受实地条件的影响，因而能快速得出分析结果，为声屏障的设计提供参考依据，以便探讨和设计更多的高效声屏障形式。

Use the technical token polymer such as the analysis that differ heat, infra-red spectrum and X ray diffraction the hot property of tiny ball and structure.

利用差热分析、红外光谱及X射线衍射等技术表征聚合物微球的热性能及结构。

Use appearance of diffraction of ray of infra-red spectrometer, X, Tuo to slant property undertook pair of film layers such as appearance, fluorescent spectrometer analyse.

采用红外光谱仪、X射线衍射仪、椭偏仪、荧光光谱仪等对膜层性质进行了分析。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。