Furthermore , how to get the surface heat flux of the billet by its surface temperature and initial temperature is a typical inverse heat conduction problem ( ihcp ) in the mathematical sense 在数学意义上,就是一个利用偏微分方程的初始条件和一个边界条件来求得另一个边界条件的问题,这又恰恰就是一个典型的逆热传导问题( ihcp ) 。
The results show that the ssc can cause the topography flattening only in constant viscosity model ; for the model with temperature - dependent viscosity , although the ssc enhances the surface heat flux , it has little effects on topography 数据结果显示,在常粘性模型中,小尺度地幔对流可造成海底地形抬升;但对与温度相关的粘性模型,小尺度对流对地形几乎不产生影响。
Based on the spatial distribution difference of 4 periods ( morning , afternoon , the first half night and last half night , respectively ) , it can be found that the impact on cg lightning activity of surface heating , lower tropospheric jet before dawn and sea wind front 通过上午、下午、前半夜和后半夜4个时段的地闪空间分布的差异,可以看出午后地面加热、凌晨低空急流和海风锋对闪电活动的影响。
The contribution ratio of the surface heat source is expressed by its boundary condition and that of the inner volumetric source expressed by the source term in the governing equation , and the total contribution ratios from all the discrete heat sources are unity 其次,通过广泛意义上的贡献因子概念来描述/鉴别不同的离散热源。最后,在热源统一的传热特性基础上定义了热源强度概念,它决定了离散热源在相互作用中的地位。
Though we want to get the optimized values of the unknown controlling parameters in cc process through the surface temperature of the billet , the direct solution is difficult . of course , those unknown parameters have close relation with the surface heat flux of the billet 由于这些待辨识的工艺参数是与连铸坯的表面热流有着密切的关系,所以需要首先利用连铸坯的表面温度测量值来计算出连铸坯的表面热流,然后再辨识出未知的工艺参数。