index of mean

The quality of stand was evaluated by means of the selection index of mean annual increment and slope of grain .

用树高年平均生长量和木材纹理倾斜度的综合选择指数的大小来评价林分的优劣。

The landscape index of mean patch area , diversity index , dominance and patch density was selected to study the relationship among the landscape pattern and slope and aspect .

选取平均斑块面积、多样性指数、优势度、斑块密度四个景观指数，研究景观格局与坡度、坡向之间的相互关系。

The index of mean sensitivity ( MS ) from various fossil woods is between 0 and 0.2 , as a whole , showing the trees growth under the well environment with annual precipitation or water provided equably in Yixian age .

义县组各种化石木的平均敏感度（MS）在0～0.2间，表明树木总体生长在年降水量或水供应较均匀的环境。

The equivalent relationships of the tests were determined by equating sample , Using the cross-validation sample , the equating accuracy was evaluated by the index of Root Mean Squared Difference ( RMSD ) .

三测验的等值关系式通过等值样本来确定，而各种等值方法的等值精确性和稳健性则由交互验证样本通过RMSD指标来评估。