以下为句子列表：
英文: Abstract: The method and circuits of four-electrod-half bridge technique for the measurement of conductivity and permittivity of fermentation liquid are presented.
中文: 文摘:提出了用替代网络－四电极－半桥技术测量发酵液的电导率和电容率的方法和电路。
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英文: During the accelerated thermal aging and ultraviolet radiation aging of PMMA which is used as the core materials of fiber in POF, it was found that the relative permittivity of PMMA decreased significantly to approximately equal to its square refractive i
中文: 摘要实验中观察到用作塑料光纤纤芯材料的纯有机玻璃（聚甲基丙烯酸甲酯）在加速热老化和紫外老化过程中其相对电容率急剧下降至大约等于其折射率的平方，即有机玻璃由极性聚合物变为非极性聚合物（“全去偶极子极化”现象）。
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英文: The cold-pressing ceramic processing technique was used to prepare high-permittivity Barium Titanate ceramics.
中文: 摘要采用冷压陶瓷处理技术制备了高介电率钛酸钡陶瓷材料。
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英文: The refractive index of a substance is determined by two properties known as the electrical permittivity and the magnetic permeability.
中文: 物质的折射率由两项性质决定，分别是介电常数和磁导率。
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英文: This paper describes a reconstructive algorithm which is based on network theory for electrical capacitance tomography technic.There are twelve electrodes in the system.The permittivity distribution of flow with two components within a pipeline is reconst
中文: 本文描述了一种用于两种成份的流体成像的12电极电容层析成像新方法.该方法基于电路的网络理论，首先对重建区域假定一个介电率分布，用电容网络作为离散化模型，将每一个源电极和探测电极对组成的测量电路看作一个四端网络，该四端网络的跨导与源电极和探测电极之间的电容值是线性关系，这个电容值和测量得到的电容值之间存在误差，根据这个误差对修正介电率分布.通过对不同介质分布作的模拟实验结果，证实了该算法是有效的，收敛的.
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