The fractional calculus approach in the constitutive relationship model of a generalized second grade fluid is introduced.Exact analytical solutions are obtained for a class of unsteady flows for the generalized secon...The fractional calculus approach in the constitutive relationship model of a generalized second grade fluid is introduced.Exact analytical solutions are obtained for a class of unsteady flows for the generalized second grade fluid with the fractional derivative model between two parallel plates by using the Laplace transform and Fourier transform for fractional calculus.The unsteady flows are generated by the impulsive motion or periodic oscillation of one of the plates.In addition,the solutions of the shear stresses at the plates are also determined.展开更多
目的:建立不同品种重楼属植物红外指纹图谱,为重楼药材的快速鉴别提供理论依据。方法:采用傅里叶变换红外光谱仪(FFIR)测定不同品种的重楼属植物,运用Nicolet Omnic Ver 8.2红外光谱处理软件对所获指纹图谱进行特征峰指认和二阶导数图...目的:建立不同品种重楼属植物红外指纹图谱,为重楼药材的快速鉴别提供理论依据。方法:采用傅里叶变换红外光谱仪(FFIR)测定不同品种的重楼属植物,运用Nicolet Omnic Ver 8.2红外光谱处理软件对所获指纹图谱进行特征峰指认和二阶导数图谱对比分析。结果:不同品种重楼属植物的指纹图谱间有一定差异,二阶导数图谱比较差异较明显,可作为不同品种重楼属植物的鉴别特征。结论:红外指纹图谱法可快速鉴别不同品种重楼属植物,且操作简便、易行,对其他中药材的品种鉴定具有参考价值。展开更多
基金The project supported by the National Natural Science Foundation of China (10372007,10002003) and CNPC Innovation Fund
文摘The fractional calculus approach in the constitutive relationship model of a generalized second grade fluid is introduced.Exact analytical solutions are obtained for a class of unsteady flows for the generalized second grade fluid with the fractional derivative model between two parallel plates by using the Laplace transform and Fourier transform for fractional calculus.The unsteady flows are generated by the impulsive motion or periodic oscillation of one of the plates.In addition,the solutions of the shear stresses at the plates are also determined.
文摘目的:建立不同品种重楼属植物红外指纹图谱,为重楼药材的快速鉴别提供理论依据。方法:采用傅里叶变换红外光谱仪(FFIR)测定不同品种的重楼属植物,运用Nicolet Omnic Ver 8.2红外光谱处理软件对所获指纹图谱进行特征峰指认和二阶导数图谱对比分析。结果:不同品种重楼属植物的指纹图谱间有一定差异,二阶导数图谱比较差异较明显,可作为不同品种重楼属植物的鉴别特征。结论:红外指纹图谱法可快速鉴别不同品种重楼属植物,且操作简便、易行,对其他中药材的品种鉴定具有参考价值。
