单轴各向异性左手材料中电磁波偏振特性研究

基于电磁场理论,推导了单轴各向异性左手材料中电磁波的传播特性,得出电磁波在各向异性左手材料中传播的条件限制.分析了正常材料和单轴各向异性左手材料界面处发生全反射现象和偏振现象情况,得到了与正常材料以及各向同性左手材料显著不同的结论,有特殊物理意义.

全站仪极坐标法在相似材料模拟试验中的应用

通过理论分析全站仪极坐标法的观测原理,并以断层相似材料模拟试验为例,探讨了全站仪极坐标法在相似模拟试验覆岩运移监测中的应用。研究结果表明:运用全站仪极坐标法观测可准确获得待测点各开采阶段的位移坐标值,计算得到待测点的水平位移及垂直位移。全站仪极坐标法观测可满足相似模拟试验测量精度的要求,能准确地确定断层活化时间,测得断层活化量,反映覆岩运移规律,是相似材料模拟试验中行之有效的观测方法。

Theoretical, Simulation and Experimental Analysis of Microfluidic Droplet Generation and Recovering Process with Applications in Frying Oil Assessments

The research on microfluidic droplet size prediction has been extensive and fruitful, while the droplet deforming process has been seldom studied. In this paper, a frying-oil-assessing microfluidic device was designed to study the droplet deforming and recovering processes, which were dominated by channel geometry, flow rates,sheath flow viscosity and interfacial tension of the two phases. Theoretical expressions of the deforming process and its extreme value were obtained for the first time, supported by simulation and experiments. Theoretical,simulation and experimental results indicated that the steady-state droplet length could be a useful parameter for frying oil assessment.

通过总极性物质监测油脂控制氧化工艺

研究了在油脂控制氧化工艺中,通过检测总极性物质(TPM)来控制油脂氧化程度方法。为了和常用的控制指标茴香胺值(p-AV)相联系,建立了氧化牛油、鸡油、玉米油、葵花籽油、菜籽油和大豆油的茴香胺值和总极性物质(TPM)数值的关系式。6种不同油脂都得到了拟合度接近1的p-AV(y)与TPM(x)的关系式:牛油y=5.724 9x^(0.85)(R^2=0.973 2)、鸡油y=0.433 3^(x1.791 1)(R^2=0.979 9)、玉米油y=6.478 6x-66.77(R^2=0.989 4)、葵花籽油y=6.802 2x-62.474(R^2=0.990 8)、菜籽油y=8.805 9x-37.925(R^2=0.990 9)、大豆油y=7.289 8x-68.129(R^2=0.994 1)。结果表明,通过这些公式依据TPM的数值计算得到的p-AV与实际测试值非常接近,证明了TPM在油脂控制氧化工艺中实时表征反应终点的可行性。