查询词典 ions

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The influence of the doped content of Tb3+ ions on the emission intensity was also investigated and the concentration quench occurs when the doped content of Tb3+ ions is beyond 9%, which can be explained by electric multipole-multipole interaction according to Dexters theory.

考察了掺杂离子浓度对样品发光效率的影响，Tb3+的最佳掺杂摩尔分数为9%，分析了其自身浓度猝灭机理，探讨了敏化剂Ce3+离子的加入对荧光粉发光强度的影响。

The results indicated that the dopings of appropriate amount of rare earth ions improved the dielectric constants, where the optimal doping concentratrations of Er3+ and Eu3+ ions were around 4.5% and 5.7%, respectively.

结果表明，稀土离子的适量掺杂使BST薄膜介电常数有所提高，其中， Er3+和Eu3+的最佳掺杂浓度分别为4.5%及5.7%左右时，介电常数值达到最高。

The minim Cd ions and Cr ions are kinds of injurants in drinking water, which is need removed for human.

饮用水中微量Cr和Cd重金属离子是需要脱除的一类有害物质。

To increase the supply of negative ions indoors,some scientists recommend the use of ionizers:small portable machines which generate negative ions.

为了给室内增加负离子，有些科学家推荐使用离子器—能产生负离子的小型便携式机器。很明显，A正确。

And 17 were capable of detecting specific metal ions by showing dramatic enhancement of fluorescence. In contrast with 15 and 17, the fluorescence signals of 13 and 14 were inefficiently altered by metal ions. Hence, 15 and 17 were further investigated with detailed 1H-NMR, UV-vis, and fluorescence titrations.

其中，15和17对特定金属离子有明显的侦测能力，混合后萤光强度会大幅增强，但13及14与金属离子混合后，萤光讯号的改变幅度不如15及17的显著，因此我们只对15和17进行详细的1H-NMR、UV-vis及萤光光谱的滴定。

In order to increase the peak depth of nitrogen atoms during the nitrogen plasma ion implantation of Ti-6Al-4V alloy, the rare earth metal yttrium was used to increase the implantation and diffusion depth of nitrogen atoms. In the experiment, the yttrium ions were implanted under the voltage of 20 kV firstly, and then the nitrogen ions were implanted under 30 kV.

为了提高氮离子体浸没离子注入Ti-6Al-4V合金时氮原子的峰值深度，利用钇来增加氮在基体中的注入深度和扩散深度，先用20 kV的电压进行钇离子体浸没离子注入处理，然后用30 kV的电压进行氮离子体浸没离子注入处理。

WANG Lang-ping, TANG Bao-yin, WANG Xiao-feng, WANG Song-yan, LIU Ai-guo, TIAN Xiu-bo (National Key Laboratory of Advanced Welding Production and Technology, Harbin Institute of Technology, Harbin 150001, China)Abstract: In order to increase the peak depth of nitrogen atoms during the nitrogen plasma ion implantation of Ti-6Al-4V alloy, the rare earth metal yttrium was used to increase the implantation and diffusion depth of nitrogen atoms. In the experiment, the yttrium ions were implanted under the voltage of 20 kV firstly, and then the nitrogen ions were implanted under 30 kV.

为了提高氮等离子体浸没离子注入Ti-6Al-4V合金时氮原子的峰值深度，利用钇来增加氮在基体中的注入深度和扩散深度，先用20 kV的电压进行钇等离子体浸没离子注入处理，然后用30 kV的电压进行氮等离子体浸没离子注入处理。

Those ions will perform stable oscillation nearby the beam orbit while their mass is larger than a critical mass. The accumulation of trapped ions nearby the beam orbit, interacting with beam, can cause the tune shift of beam, blowup of beam emittance, increase of local vacuum pressure, and can even lead to the occurrence of beam instability.

这些被俘获的离子在束流轨道附近的积累并和束流的相互作用，会引起束流振荡频率的漂移和展宽、束流发射度的增加、局部真空度的恶化等各种负效应，有时甚至会导致束流不稳定的发生，从而影响储存环的正常工作，在这种情况下采用离子清洗方法将离子清洗掉对保证储存环的长期、稳定的运行是必要的。

The research aimed to study the effects of calcium ions Pb(superscript 2+ and plumbum ions Cd(superscript 2+ on the physiological and biochemical indices of seedling trees of Yunhe Snow Pear to provide references for produce of Yunhe Snow Pear.

［目的］研究Pb(上标 2+)、Cd(上标 2+)及其复合处理对云和雪梨树苗生理生化指标的影响，为种苗生产提供参考。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐