查询词典 ionization potential

In this paper the pulse measurement used to measure the pulse ionization electron current for electron impact ion source of time of flight mass spectrometer was discussed, the shortcoming of average current measurement was analyzed, and the practical measuring circuit of the pulse was given.

本文讨论了脉冲测量技术在飞行时间质谱计电子轰击离子源中测量脉冲离化电子流的应用，分析了平均电流测量方法测量脉冲离化电子流的局限性，给出了实际的脉冲测量电

For the current in the ionization chamber is not amplified, so it is hard to collect the electric signal, in this paper, a direct I/F convertor is used to convert the electric current signal into frequent signal.

由于电离室本身不对电流放大，因此信号的采集较为困难，本文另外介绍了用I/F直接变换的电路以达到信号的转换。

The films show large crystalline size and high orientation degree.The structure characteristics were examined with X-ray diffraction and electronic microscope as functions of the ionization current and acceleration voltage.

在单晶Si及玻璃衬底上演积的CdTe膜具有定向生长的大晶粒结构，其晶粒尺寸、取向度与离化电流、加速电压等可控实验参数之间的关系在实验结果中得到了反映。

With this data, we can calculate the resistance, conductivity, ionization voltage and discharge current parameters. This may help us to comprehend more about the electric discharge phenomena.

经由此研究，不但可得碳棒电极间距大小与电压之关系为非直线性，进而获得控制维持电弧持续放电之距离，可应用於金银等电极间或以水等介质作放电的研究。

A self- designed direct current Plasma ionization detectorwas used to determine the carbon dioxide in air with he lium being used as carrier and support gas,the experimental parame-ters of HeDCPID affecting the determination of carbon dioxide were examined.

用改进的直流等离子体离子化检测器对空气中的二氧化碳进行测定。

Main contents and conclusions are: 1 The ionization current was measured continuously by a charge-integration method with a computer after the introduction of radon into the chamber.

主要内容及结论：1充氡后利用计算机连续进行电离电流累积测量，得到了精细的电流随时间的变化曲线，可清楚看出氡及其子体的生成衰变造成的电离电流的生长—稳定—衰减过程，与理论计算值进行了比较，由电离电流衰减速度的变化得出氡吸附作用的影响，并测量到电离室冲洗后氡的反扩散现象；2由已知活度的标准源定出相对测量的刻度系数K值，K=24.62 Bq／pA，对同一个监测源以半年为周期进行多次测量后得出稳定性符合要求；3通过测量电离电流和气压的关系曲线以及不同气压下的饱和曲线，确定了常规的工作条件；4测量了盐酸清洗电离室内表面降低本底的效果；5不确定度分析表明相对测氡的扩展不确定度(k=2)小于5％，由本底涨落得出探测下限为0.5 Bq；6理论上对壁损失修正进行了计算，实验上保持电离室工作在饱和区的情况下，测量了不同气压下电离电流的变化，从中得出了壁损失随气压变化的规律，可以看出，电离电流的实测值和计算值随气压变化规律基本一致；当气压大于125 kPa时，端效应等其它因素造成的影响不大于2％，因而在此工作条件下，测量电离电流后通过计算修正壁损失可以实现近似的绝对测氡，提出了进一步提高绝对测量准确度的方法。

The metals and conductive materials with high first ionization energy may have good characteristics of field emission.

第一电离能较高的金属和导体材料可能有着较好的场发射特性。

In the view of ionization energy, K element can be excluded.

综合考虑，Na作为ZnO的p型掺杂元素较好。

We explain the reason of conformational dependence of vertical ionization energy.

我们解释了天冬氨酸垂直电离能产生构型依赖性的原因。

The first ionization energy of element of cathode material is an important factor with influence on the the performance of field emitter.

阴极材料元素的第一电离能是影响场发射体性能的重要因素。

I was just taking her hand, to help her out of a car, and I knew it.

我只是握着她的手，扶她下车，但我知道这一切。

China and South Korea have excoriated Japan over its approval of new school books which they say whitewash the atrocities committed during Japanese occupation, and anti-Japanese protests have been held in Chinese cities. The lingering bitterness over Japan's past imperialism still threatens to mar relations between the big East Asian powers

中国和韩国强烈谴责日本通过新的中学历史教科书，他们认为这一教科书掩盖了日本在其占领期间所犯下的残酷暴行，反日抗议活动在中国数座城市发生，历史上日本帝国主义制造的痛楚无法被忘却，这有可能破坏东亚强国间的关系。