Here, the sound pressure field and particle velocity field of sound diffraction by an elastic spherical shell are studied theoretically.

PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.

采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。

Sound velocimeter and X-ray Diffraction ( XRD) were used to measure the crystallization and orientation of the fiber.

通过采用声速仪、X-射线衍射（WXRD）等分析与检测手段对纤维取向度和结晶度进行了测定。

The structure and properties of fiber of IPP ( Z30S) blent with different content of chemical degrading modifying adduct have been studied by the way of density, velocity of sound, Xray diffraction and stressmeter.

采用密度法，声速法，X射线衍射，强力试验仪研究了化学降解改进剂含量不同的等规聚丙烯IPP（Z30S）共混纤维的结构和性能；

Approximate Calculation of the Sound Field of Diffraction of Barrier

声屏障衍射声场的近似计算

The influences of sound diffraction by a spherical shell on the measurement results and directivity of AVS were calculated by using the approximate equation of mechanical impedances of the thin spherical shell.

采用薄壁球壳机械阻抗近似公式，计算了球壳声衍射对矢量传感器声场测量和指向性的影响。

Influences of sound diffraction by elastic spherical shell on acoustic vector sensor measurement

弹性球壳声衍射对矢量传感器测量影响

Its structure was established using X-ray single crystal diffraction analysis.

通过单晶衍射的数据分析，确定了其分子结构。

The development and application of the X-ray double crystal diffraction technology

X射线双晶衍射技术的发展及应用

Consistence of Laue Equation And Bragg Equation in Crystal Diffraction

晶体衍射中劳厄方程和布拉格方程的一致性

Methods: x-ray crystal diffraction method.

方法：X－射线晶体衍射法。

Progress in materials characterization technique based on in situ neutron diffraction

原位中子衍射材料表征技术的进展

Technology and Application of Nondestructive Residual Stress Measurement by Neutron Diffraction

中子衍射残余应力无损测量技术及应用

The technology and application of residual stress analysis by neutron diffraction

中子衍射残余应力分析技术及其应用

A-fe2o3 ( haematite) was one of the first compounds to be studied by neutron diffraction.

a-fe2o3（赤铁矿）是中子衍射最先研究的化合物之一。

In order to eliminate the false singularities in the Fringe Components of Equivalent Edge Currents expressions, this paper extends the treatment of false singularities of diffraction coefficients in the Physical Theory of Diffraction into the Fringe Components of Equivalent Edge Currents expressions.

为消除等效电磁流边缘分量表达式中虚假奇异点，将物理绕射理论中处理绕射系数的虚假奇异点的方法推广到等效电磁流边缘分量表达式中。

In optical measurement, we could calibrate precision instrument and increase the measuring precision by using the laser interference ( diffraction) fringe orders; the fringe orders could be automatically determined by the zero order fringes' minimum chromatic polarization;

光测量主要通过激光发生干涉（衍射），利用干涉（衍射）条纹的级次进行定标、精确测量，利用零级条纹色偏最小原理，对条纹级次进行自动判断；

The distance between adjacent dark fringes of diffraction fringe of wire is determined at low and high temperature by CCD detector, the value of high temperature is measured by pyrophotometer, and the coefficient of linear expansion of wire is calculated.

利用CCD探测器分别测出常温和高温下金属丝衍射花样相邻暗纹的间距，用光学高温计测出加热时的温度值，从而求出线膨胀系数。

Analytic Expression of Diffraction Fringe of Varied-line-space Plane Gratings

平面变线距光栅衍射场的解析表达式

Variation in single slit Fraunhofer ′ s diffraction fringe in transparent medium

透明介质中单缝Fraunhofer′s衍射条纹的变化

When the slit of light source there is definite width W, the width of diffraction fringe should increase, and the minimum resolving angle Δθ k should be increasing, then the resolving power of actual grating system should be decreasing.

当光源狭缝还有一定宽度W时，衍射条纹将增宽，相应最小分辨角Δθk将增大，实际光栅系统的分辨本领将减小。