利用正交实验设计法优选出质子交换膜燃料电池(PEMFC)电极催化层制备的最佳条件，即制备亲水电极。
The optimal composition of catalyst layer in proton exchange membrane fuel cell (PEMFC) electrode was prepared through orthogonal method, which is called hydrophilic electrode.
采用正交实验设计，利用超声法从琐琐葡萄中提取生物活性成分总三萜，比色法测定总三萜的含量。
The ultrasound assisted extraction(UAE)of total flavonoids and total triterpenoids from the leaves of Diospyros kaki is studied in this paper.
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