...f = o 4 4 54 ′ = o θ 对于完全取向的材料 对于完全未取向的材料 非晶区的取向度 取向度的测定 声速法(Sound velocity method) 分子的取向度 光学双折射法(Birefringence anisptropic method) 链段的取向度 广角x-射线衍射法(Wide-angle X-ray diffraction)...
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ii) 声波传播法 声波传播法(Sound velocity method) —晶区与非晶区的平均取向度,反映整个分子链的取向情况 晶区与非晶区的平均取向度, 晶区与非晶区的平均取向度
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In this paper, the principle and primary results of measure ultrasonic sound velocity and attenuation coefficient by ultrasonic syntonic method are introduced.
本文介绍利用超声共振法测量声速和声衰减系数的原理及自来水和乙醇的测量结果。
A frequency domain characterization method using low frequency ultrasound is put forward to estimate parameters of ultra thin elastic layers, such as: the sound velocity, thickness and density.
本文提出一种定量无损估计超薄弹性层声速、厚度和密度参数的低频超声波频域定征方法。
Sing-around method for sound velocity measurement have found wide acceptance because it is simple in circuitry and high in accuracy.
环鸣测量声速法具有电路简单、使用方便、测量精度高等优点，已广泛地应用。
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