离子的

This invention discloses a new technology for preparing rear earth ionic doped fiber prefabricated rods with DC-RTA technology in a sol-gel method including preparing sol containing necessary doped ions, coating said sol uniformly on the inner wall of the quartz glass tube and burning it under high temperature to coagulate and vitrify them to a doped layer and repeating the above process to form a fiber prefabricated rod by oxygen and hydrogen flame after the doped layer reaches to a designed thickness and the fiber prefabricated rod can be made to various rare earth ionic doped fibers by an ordinary drawbench technology.

本发明属于光纤制造和光纤激光技术领域，具体公开了一种利用溶胶凝胶方法中的DC-RTA技术制备稀土离子掺杂光纤预制棒的新工艺。该工艺步骤包括预先配制好含有所需掺杂离子的溶胶，将该溶胶均匀涂覆在石英玻璃管的内壁后高温灼烧，使之凝结并玻璃化为一层掺杂层。反复上述涂覆灼烧过程，在掺杂层达到设计厚度后由氢氧焰高温收棒形成光纤预制棒。该方法所得到的光纤预制棒可以通过普通拉丝工艺拉制成各类稀土离子掺杂光纤。

This paper discusses the cause of chlorine ions formation in the production of sodium dichromate and its influence on production environment and quality.

本文讨论了红矾钠生产过程中氯离子产生的原因及对生产环镜、产品质量的影响，进而分析生产工艺流程中除去氯离子的有关工艺参数，将其结果应用于实际生产，使产品中的氯离子含量在0.1%以下。

According to XRD analysis, the high concentration doping of dysprosium ions in Fe3O4 can not be obtained due to the difference of ionic radius, and Fe^3＋ ions are replaced by only a small amount of dysprosium ions.

通过X射线衍射分析发现，由于离子半径的不匹配，Fe3O4中稀土离子的高浓度掺杂不能实现，仅有极少量的稀土离子取代了Fe3O4中的Fe^3＋。

The research indicated that chloride ingression is largely determined by exposure time, chloride binding, environment temperature, stress and cracks conditions, the symptoms of which could be found with the modifier of the apparent diffusion coefficient Da of chloride, in the model of concrete service life prediction.

研究表明，暴露时间、胶凝材料对氯离子的吸附作用、混凝土保护层应力和裂缝状态、环境温度等对混凝土中氯离子的迁移均有较大的影响，这些影响因素可以通过对氯离子表观扩散系数的修正来表征，将其引入使用寿命预测模型。

Factors including pH, concentrations of heavy metals, dosages of minerals, ionic strength and temperature were studied and the results indicated that nepheline syenite and olivine had significantly higher capacity of absorbing heavy metal ions than glacimarine clay since they possessed stronger neutralization ability to acidic solution.

考察的因素包括溶液pH值、重金属离子浓度、矿物用量、离子强度、温度等，并得出结论，霞石正长岩和橄榄石吸附重金属离子的能力明显强于冰海粘土。通过理论分析表明，导致这一现象的原因为霞石正长岩和橄榄石对酸性溶液具有更强的中和能力。

The significance of this research is that to understand the effects of sublethal metal toxicity on the fish and how such effects could be set up as molecular biomarkers to indicate the exposure of fish to low metal concentrations.

混合重金属离子相互作用对其在鲫鱼组织中积累的影响结果表明，混合重金属离子相互作用对Cu、Pb在鲫鱼组织中的积累的影响与离子的种类、数量及组织的类型有关。

The main idea of the simulation is adopting Monte Carlo method and the classical over barrier model to simulate the randomicity of the charge exchange processes between projectile and metal and the dispersing of projectile's continuum movement. In each step, the movement of projectile is considered to a uniform acceleration.

本论文模拟的基本思想是在经典过垒模型下，采用蒙特卡罗方法来模拟入射离子与固体间电荷交换过程的随机性，并将入射离子连续的运动过程离散化，在每一个步长中，将入射离子的运动近似看成是匀加速直线运动。

Especially, the uniformization effect of Na+ ions is better than that of K+ ions.

推测Na离子的作用是消除了PbF2：Gd晶体中因Gd离子的掺杂而造成的间隙F离子，从而使晶体中的缺陷浓度大大降低。

A study on exchange-adsorption of aluminium and manganous ions under conditions close to the field was carried out.

研究了贴近自然的稀溶液条件下铝、锰离子交换吸附的行为，结果是：铝、锰与钙、钾离子的交换吸附仍符合一般的离子交换规律，但也不遵守比例定律。

It is used as a competitive inhibitor of certain enzymes that have metal ion cofactors, and as a source of iron, which it releases slowly into the solution.

通常用来作为某种带有金属离子的酶的竞争性抑制剂，由于它可以向溶液中缓慢释放铁离子， EDTA 还可作为铁离子的来源。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。