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生物肌肉组织δ色散机理

Mechanism of δ dispersion of biological muscular tissue

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以人体肌肉组织为例,研究δ色散发生的频率区间,验证δ色散是一种发生在较宽频率范围内的色散现象.改变4阶Cole-Cole模型中的4个弛豫时间,粗略判断4种色散发生的频率区间,在此频率区间内通过数值计算得出介电常数及其增量,并据此判断α、β、δ、y色散发生的精确频率区间.结果表明肌肉组织α色散发生的频率区间在4种色散中是最窄的,但对应的介电常数的变化量是4种色散中最大的.β色散发生的频率范围较α色散的大,对应的介电常数的变化范围小于α色散的.δ色散发生的频率范围比α、β色散的都大,但其对应的介电常数比α、β色散的要小.y色散对应的介电常数是4种色散中最小的.
The frequency range of δ dispersion of biological muscular tissue was studied and the fact that the δ dispersion occurs over a wide frequency range was verified.The frequency ranges were roughly evaluated by changing four relaxation time parameters by using the four-order Cole-Cole model.Afterwards,the dielectric constants and their increments within the frequency ranges were numerically calculated.Base on the increment of the dielectric constants,the precise frequency range of α,r,δ and γ dispersions in muscular tissues were evaluated.The results showed that the α dispersion of muscular tissue presented the most narrow frequency range compared with any other type of dispersion,the corresponding increment of dielectric constant was larger than that of any other dispersion.The frequency range of β dispersion was wider than that of α dispersion.However,the increment of the dielectric constant of β dispersion was smaller than that of α dispersion.The δ dispersion frequency range was wider than those of α and β dispersions.And the corresponding increment of dielectric constant was smaller compared with those of α and β dispersions.The γ dispersion increment of dielectric constant was the narrowest.

muscular tissuedispersion typeCole-Cole modeldielectric constant

田瑞、逯迈

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兰州交通大学光电技术与智能控制教育部重点实验室,兰州730070

兰州交通大学自动化与电气工程学院,兰州730070

肌肉组织 色散方式 Cole-Cole模型 介电常数

国家自然科学基金国家自然科学基金甘肃省杰出青年基金兰州交通大学青年基金兰州交通大学光电技术与智能控制教育部重点实验室开放课题

51267010515670151308RJDA0132012004KFKT2016-5

2016

兰州大学学报(自然科学版)
兰州大学

兰州大学学报(自然科学版)

CSTPCDCSCD北大核心
影响因子:0.855
ISSN:0455-2059
年,卷(期):2016.52(6)
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