传热系数，热阻率，导热系数，换热器，热对流，热传导，热辐射，对流传热。
Heat-transfer coefficient, heat resistivity, heat conductivity, heat exchanger, heating convection, heat conduction, heat radiation, heat convection exchange.
散热片选用较高导热系数的材料对提高热传导效率很有帮助。
Selection of high thermal conductivity of the heat sink material is very helpful to improve the efficiency of heat conduction.
利用成熟的气体导热模型和气体分子运动论，对快速瞬态高强度加热情况下的热传导问题进行了理论研究。
The heat conduction for rapid transient and strong heating was researched by the mature heat conduction model of gas and kinetic theory of gases.
本文讨论了通过重新布置场内的导热系数分布来强化热传导的导热优化问题。
The optimization of heat conduction through rearranging the distribution of the thermal conductivity to realize heat conduction enhancement is studied in this paper.
首先，根据热传导的基本原理，建立温度场的傅立叶导热微分方程。
Firstly, in the sight of basic principle on conductions of heat, Fourier heat conduction differential equation of temperature field is founded.
铜是最好的热传导体，其导热能力约为铁的7倍，铁的导热能力是水的100倍，而水的导热能力是空气的25倍。
Copper is the best conductor of heat, having about 7 times the conducting power of iron, while iron conducts 100 times as well as water, and water has 25 times the conductivity of air.
又对于变密度、变比热、变导热系数这样的更一般的情况也推立了六个二阶热传导的微分方程。
By the way, for the case of variable density, specific heat as well as thermal conductivity, we have been successful to deduce other similar six heat transfer differential equations.
当介质的导热系数是温度的函数时，热传导方程是非线性偏微分方程，作者采用基尔霍夫变换把它变成拉普拉斯方程，于是可以找到原问题的近似解析解。
The nonlinear equation of heat conduction is transformed into a Laplace's equation by applying the Kirchhoff transformation, and an analytic approximate solution of the equation is derived.
当介质的导热系数是温度的函数时，热传导方程是非线性偏微分方程，作者采用基尔霍夫变换把它变成拉普拉斯方程，于是可以找到原问题的近似解析解。
The nonlinear equation of heat conduction is transformed into a Laplace's equation by applying the Kirchhoff transformation, and an analytic approximate solution of the equation is derived.
应用推荐