sequential experiment

The acidification potential of bareness rocks and potentially surficial mobility of heavy metals in bareness rocks were studied by acid production potential test, net acid production test and sequential extraction experiment.

利用净产酸量、净产酸势实验和连续化学浸取实验，研究了抚顺西露天采场裸露岩石的酸化潜势和重金属的表生活动性。

The target function adopted in this method is more suitable for SVR. Moreover, by considering that redundant feature is small in special experiment data, this work uses sequential backward selection method in the fea-ture subset selection.

该算法采用了一个适合支持向量回归（SVR）的新目标函数，并在特征子集选择中根据实验数据集冗余特征较少的特点，采用顺序后向选择算法。

Conclusion The EC50 epidural ropivacaine for analgesia in the first stage of labor is 0.063% determined by sequential experiment method.

结论利用序贯试验方法测定自然分娩时硬膜外罗哌卡因镇痛的EC50是0.063%。