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缺陷波     
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  fault waves
     In order to improve it,we have developed the automatic flaw detection system of the moving-wheels. This paper mainly introduced the emitting & receiving system of the electromagnetic ultrasonic surface wave and utilized the principle that the electromagnetic ultrasonic surface wave can detect flaws of the moving-wheels to analyze the ways of dealing with some important detection data and fault waves.
     为了改善这种情况,我们研制了车轮动态自动探伤系统,本文主要介绍电磁超声表面波的激发和接收机制,利用电磁超声表面波对车轮探伤的原理,并分析了一些重要的探伤参数和缺陷波的处理方法。
短句来源
  defect wave
     The relationship between axial liquid path and second focus depth in the workpiece,identification of defect wave by using longitudinal and shear wave,the effects of refraction angle and focus flare angle on detection sensitivity were investigated.
     研究了工件内二次焦点深度随轴向液程的变化关系,横波和纵波检测时缺陷波的识别问题,以及折射角和焦点张角对检测灵敏度的影响。
短句来源
     Without disturbance of surface echo wave,defect wave is easily identified by using shear wave to detect lack of penetration in the root segment.
     利用横波检测根部未焊透缺陷,无表面回波干扰,缺陷波容易识别。
短句来源
  defect echo
     Comparative experiments were carried out on ZGS reference block to test the 9 flat bottom holes(FBH) with different depths by three imaging methods i.e. the ultrasonic defect echo amplitude imaging method, the ultrasonic defect echo depth imaging method and the ultrasonic bottom echo imaging method.
     采用缺陷波幅值成像、缺陷波深度成像和底波幅值成像三种成像方式对ZGS对比试块上的9个不同深度的2 mm平底孔进行了检测。
短句来源
     It was shown by the experimental results that all the 9 FBHs were found with lower system gain by ultrasonic bottom echo imaging method, especially those sub-surface ones in the dead zone when using ultrasonic defect echo amplitude imaging method. It was proved that the ultrasonic bottom echo imaging method was a feasible and effective complement for the ultrasonic defect echo amplitude imaging method.
     对比试验表明,超声底波成像方法可用较低的系统增益检测出缺陷,也能检测出用缺陷波幅值成像方法时近表面盲区部位的缺陷,是缺陷信号幅值成像方法的有效补充。
短句来源
  defect waves
     This paper mainly introduces the ultrasonic detecting method against longitudinal cracks on 60 mm×6 mm reducing pipe installed in boiler water wall, including probe selection, adjusting of detecting sensitivity, identification of defect waves, and etc.
     文章重点介绍了60mm× 6mm水冷壁管异径管内壁纵向裂纹的超声波检验方法。 包括探头K值选择、探伤灵敏度调整、缺陷波识别等
短句来源
     By use of the properties of reflection and diffraction of supersonic wave,and through the comparison of the normal waves and the defect waves produced at the tooth root of high strength bolts,the theoretical base of application of single crystal straight probe in on-line inspection of high strength bolt was studied. The possibility of practical use of this method was discussed.
     运用超声波的反射及绕射特性,通过对其作用于高强度螺栓齿根部位所产生的正常齿形波与可能的缺陷波的比较,研究单晶直探头用于高强度螺栓的在线检测的理论基础,探讨其实际使用的效果,即可能性。
短句来源

 

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      defect wave
    The laws of plane defect wave propagation across the interface between two viscoplastic media
          
    especially the Bethe-Goldstone (or defect) wave functions are defined uniquely and differ from those used in former comparisons; 3.
          
    It is shown that, as a result of stabilization of the crystal studied in the incommensurate phase, its symmetry and the symmetry of the metal-halogen complex in it lower depending on the defect wave.
          
      defect echo
    During detection of the defects in the inner wall of a petroleum pipeline via an ultrasonic nondestructive evaluation method, the defect echo and the inner-wall echo often overlap.
          
    It is difficult to identify the arriving time of the defect echo.
          
    In previous work by the authors,(1,6) it was demonstrated that the presence of near-surface defects could be detected reliably, even though the defect echo was contained within the near-surface echo.
          
    However, the depth can be found by pulse-echo technique where the time-of-flight from the surface to the defect echo is measured.
          
      其他


    Under the extended defect potential approximation, the electronic wave function which is a function of the PV defect energy has been derived using a tight binding Koster-Slater Green function technique. Taking the experimental value of the defect energy level as input parameter, the obtained wave function describes quantitatively the data of the electron paramagnetic resonance and electron-nuclear double resonance. Especially, the hyperfine interaction constants of the four nearest neighbor atoms around the...

    Under the extended defect potential approximation, the electronic wave function which is a function of the PV defect energy has been derived using a tight binding Koster-Slater Green function technique. Taking the experimental value of the defect energy level as input parameter, the obtained wave function describes quantitatively the data of the electron paramagnetic resonance and electron-nuclear double resonance. Especially, the hyperfine interaction constants of the four nearest neighbor atoms around the vacancy given by the theory, are in good agreement with the experiment.

    本文采用扩展的缺陷势,利用一个紧束缚的Koster-Slater格林函数方法,确定了磷-空位缺陷的波函数为深能级E的函数,以深能级的实验值为输入参数,得到的波函数定量地描述了EPR和ENDOR实验资料,特别是,理论给出空位的四个近邻原子上的超精细相互作用常数α和b,同实验符合得很好。

    The weld corner disturbing echo and its deformed wave, mountain shape echo are common and easy to be mis judged in the butt weld ultrasonic testing. In order to distinguish them from the defect echo, this article analyses their causes, and summarizes their features and judgement.

    本文对于对接焊缝超声波探伤中常见的、容易发生误判的焊角干扰回波——“山形回波”的产生原因进行了分析,总结了它们的特征和判断方法,以便于和缺陷波相区别。

    The electronic wave function which is the function of the P_(Ga) defect energy is de-rived using a tight binding Green function thechnique. The hyperfine interaction constants of the an-tisite phosphorus given by the theory , are in good agreement with experimental results. It is predict-ed qualitatively that the nearest neighbor atoms of antisite phosphorus have a outward relaxationtrend.

    本文利用紧束缚的格林函数方法,确定了Gap中P_(Ga)反位缺陷的波函数为深能级E的函数。理论给出反位原子上的超精细相互作用常数,同实验符合得很好,定性说明了GaP中P_(Ga)反位缺陷的次近邻原子有向外驰豫的趋势。

     
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