The fuel cells performance of h2 / o2 pemfc and dmfc predicted by models are compared with experimental results respectively , and reasonable agreements are achieved 比较了估算的极化性能与文献中的实验数据,结果表明本文的数学模型能够很好地模拟电池的工作性能。
As the partial pressure of o2 increases the cathode voltage of the target increases in order to maintain the same current intensity and the sedimentation rate gradually decreases 氧气分压的增大,维持同样溅射电流强度的靶阴极电压增大,薄膜的沉积速率逐渐减小。
Only by uv - light without tio2 catalyst the degradation of h2s could n ' t occur at room temperature . without o2 the photocatalytic - elimination of h2s on the tio2 was very small ( 5 % ) 在室温条件下,仅用紫外光对沼气中的h _ 2s气体进行光降解时,不能使h _ 2s转化。
The luminescence of samples attribute to the electronic transition in different energy lever of 4f configuration and the charge migration from o2 + to eu3 + by means of fluorescence spectrum 不同样品当中,不同发射峰的强度不同,从而使得不同样品的发光的颜色有所不同。
Generally speaking , there is high proportion no - o2 exercise during the high intensity exercise the insufficient oxygen can inhabit the activity of nervous system and some organs 大强度的运动中一般有大比例的无氧运动。氧量的不足对于抑制中枢神经系统和运动器官活动具有作用。
A convenient , quick and low costing new method of gas chromatographic analysis with only one column has been set up to analyze the o2 , co and co2 in sample gas by only one inject 摘要建立了一种在单色谱柱条件下一次进样同时分析样品气中的氧、一氧化碳和二氧化碳的新的色谱方法。
The detection of the dnd phenotype of the total dna isolated from the mycelie growing at an extremely low concentration of o2 showed no difference from that at normal condition 提取各菌株低氧条件下培养物的dna进行电泳检测,结果揭示该生长条件不能改变这两种菌株原有的dnd表型。
On the basis of orthogonal test , the optimum procedure parameters were determined . it is evaporating temperature of 750 , reaction pressure of 4000pa and o2 content of 50 % 以此为指标对制备工艺优化,其最佳工艺为:蒸发温度750 、反应压力4000pa和o _ 2在混合气体中的比例50 。
Because the resulting o2 concentration of 7 vol % is to close to the required concentration of o2 we have to do this twice times to get an oxygen level in the range of 2 to 3 % 因为氧气的体积浓度为7 % ,接近燃烧所需要的氧气浓度值,所以必须进行两次这样的操作,使用氧气浓度范围为2 - 3 % 。
Once being installed , previous rom cannot be restored . should problems happen during or after the installation , the device may require servicing in o2 service centres 一旦开始安装,先前的rom将无法恢复。在安装过程中以及安装完毕后如果发生问题,可能需要将此设备送至o2客服中心进行维修。