表观年龄

除径迹密度（表观年龄）外，径迹长度及其分布的变化也与古地温有关。

In addition to the density of fission tracks ( apparent age ), the change of their length and distribution can provide the information of paleotemperature .

利用CFC输入函数对地下水表观年龄进行了计算。

Apparent ages of groundwater are calculated by the input function of CFCs .

裂变径迹分析显示样品应处于剥露的部分退火带，其表观年龄主体表现为冷却年龄，部分具混合年龄特征。

The fission track analyses show that these samples are under the exhumed partial annealing zone and the apparent ages obtained are cooling ages with part mixed ages .

实验结果表明，该方法可以极大增强纹理表示的效率，提高了匹配精度和鲁棒性。（5）为了提高基于表观的年龄估计的精度，将AAM与多角度分析相结合进行特征提取。

Experimental results show that the proposed method greatly improves the efficiency of model as well as the accuracy . ( 5 ) To improve the accuracy of the age estimation system , AAM is combined with multiple principal angle analysis ( MPA ) to fulfill the feature extraction .