When the tail oxygen concentration was up to 7 % the speed of mass transfer of oxygen had no effect on the reaction ; the varieties oxygen concentration was zero series to the oxidation speed .

当尾氧浓度大于7%时，氧的 传质 速率 对反应没影响，且氧浓度变化对氧化反应速率的影响 为 零级。

After experimented the time transfer uncertainty of multi - channel GPS receiver is less than 4 ns ( elevation is more than 40 degree ) in the condition of the comparision of common - view and common - clock on zero base line .

经测试证明多通道GPS接收机 零基线共钟共视时间 比对的不确定度小于4ns（仰角40°），与国外报道基本相同。