thermal-diffusion constant

Polyimide ( PI) had been widely used in electric industries because of their outstanding characteristics, such as excellent tensile strength and modulus, low thermal expansivity and dielectric constant ε, good insulation capacity and good resistance to organic solvents.

聚酰亚胺因为其优异的性能被广泛的应用于电气工业，例如高强度与高模量，低热膨胀系数和介电常数，优异的绝缘性能和耐溶剂性。

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There is no finalized test device for standard short-model couple, because that it's difficult to realize the constant and uniform temperature field for test furnace of the thermal couple.

由于短型热电偶检定炉的恒定均匀温场难以实现，所以，国内没有定型的标准短型热电偶检定装置。

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Taking A/ Dvantage of thermal resistance through the constant current source putting the temperature into voltage, and then by 24-bit high-precision A/ D converter a convenient digital signal imported into DSP.

硬件的实现是利用热敏电阻通过恒流源激发将温度值转化为电压值，经24位的高精度A/D转换器，转化为便于处理的数字信号提供给DSP。

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Then the control system for boring the non-cylinder pin hole of piston was developed, whose main function modules including displacement ( detection,) temperature detection for thermal deformation compensation, constant current power and ( central) control unit.

然后研制了活塞异形销孔加工控制系统，包括主控、位移检测、热变形补偿温度检测和恒流源驱动等功能模块。

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The hydrolytic polymerization of Cr 3+ was studied by microcalorimetry. The Thermal curve was determined According to thermokinetic theory, the Gibbs free energy and equilibrium constant of activation were calculated.

对较高浓度下3价铬离子水解聚合作用的热谱曲线进行热动力学分析，用特征热谱参量，求出了这一连串反应的速率常数和活化平衡常数及活化自由能。

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