使结晶

The results show that the shape of meniscus is non-homogeneous because of the structure of the rectangular mold, and the height of meniscus will enlarge as increasing the power, and at the same time the meniscus fluctuate aggregately. The coil should be placed near the top of the mold and the initial free surface level should be placed in the middle of the coil in practice.

结果表明：由于矩形电磁软接触结晶器本身的结构限制，其弯月面沿周向上的分布具有不均匀性；随电源功率增大，弯月面高度增大，同时波动加剧；实际生产中线圈应尽量靠近结晶器口部位置安装，有利于提高弯月面高度和增强弯月面稳定性；浇注过程中，应该使浇注液面尽可能的控制在线圈中心偏上位置；当电源频率增大时，应该同时适当的提高电流来保证软接触效果。

The simulations show that the air gap is initial at the corner of billet.

过大的结晶器锥度将使坯壳受到结晶器壁的"挤压"作用。

In order to improve the crystallization rate of sodium bicarbonate,the method of adding salting-out agent was studied.

为了提高碳酸氢钠的结晶率，研究了采用加入盐析剂的方法，通过盐析剂的盐析作用，使碳酸氢钠的溶解度降低，从而更多地结晶析出。

Influence of fluorine on filtration of acid-insoluble matter, crystal and filtration of calcium nitrate, ammonia neutralization of mother liquor and evaporation process of slurry are discussed based on its increasing slurry viscosity, rowing fine crystal and troubling filtration in production of nitrophosphate by nitric acid decomposing phosphate rock.

介绍在硝酸分解磷矿生产硝酸磷肥的过程中，杂质氟对酸不溶物过滤、硝酸钙结晶及过滤、母液的氨中和及料浆蒸发过程的影响。由于氟的存在使物料粘度增加，结晶细小，过滤变得困难。

To 4. 4%, V from 0% to 11% is analyzed by heating and fast cooling test, diffracted X ray, color microstructure, XPS. Theory basis is provided for applications of the series alloy, as confirmed crystallize phase species and crystallize temperature, established the Fe-C, Fe-V bi-paraconstitutional diagrams and the tri-papaconstitutional diagrams relationship between the combatant to C and V and the primary crystallize phase, obtained relationship between component of alloy and solidification organizing.

确定各结晶相种类和结晶温度，建立了C、V含量与初生相关系的准3元状态图和Fe-C，Fe-V的准2元状态图，获得了合金成分与凝固组织的关系，为该系列合金的应用提供了现论依据，使根据组织要求而进行合金成分设计成为可能。

Through addition of heteropolyacid inhibitors, double boiler crystallization to greatly reduce the layer distribution between the filtering layers (mass fraction is controlled in the range of 1%~2%), pressure rises calmly with the increase of filtering time.

通过在结晶釜中加入杂多酸类阻聚剂、采用双釜变温结晶的方法，使过滤层的层间分布显著减小（质量分数控制在1%~2%范围），压力随过滤时间的增加而缓慢平稳升高。

The effect of the addition of the crystal seed in the jarosite preciptation was investigated and the results showed that the crystal seed would accelerate the crystallizing rate of jarosite formation, which convert the reaction mechanism from the crystallization kinetic rate control into the chemical reaction kinetic control.

阐述了晶种加入对沉矾影响的过程机理，认为晶种的加入加快了沉矾反应的结晶速度，使反应由结晶的动力学控制过渡到化学反应动力学控制，足量晶种加入情形下沉矾过程的活化能为94.66KJ／mol，表明了氯化物体系铁矾沉淀较硫酸盐体系中更易进行。

The effect of misch metal and yttrium on the ageing behavior of AZ91 magnesium alloy was investigated.Aluminum compounds of rare earth and yttrium with high melting point were crystallized fiirstly from the melt alloy during the solidifying process and pushed to the crystalllizing face of α phase to inhibit its growing,or became the nucleation of the matrix.

在AZ91镁合金中添加稀土和钇之后，高熔点的铝稀土化合物和铝钇化合物在凝固过程中首先结晶析出，并成为基体相的形核中心，或者被推移到初生α相结晶前沿，阻碍α相的生长，使其铸态组织得到细化。

The results show that AREEC liquid crystal enables the flow behavior of PC to change from quasi-Newtonian type to pseudo-plastic type, and it can act as heterogeneous nuclei to accelerate greatly crystallization of PET, and then to improve evidently their injection moldability.

将AREEC液晶与PC、PET熔体共混，研究了共混体系的流变行为、结晶特性和可模塑性，证明AREEC液晶能使PC流变行为由准牛顿型变为假塑性幂律型，能对PET起异相成核和显著加速结晶作用，从而大大改善它们的注塑可塑模性。

The results showed the crystallinity of the modified PET decreased with the increase of the content of NPG, but the heat shrinkability was improved obviously. Amorphous polyester material that woul...

结果表明，通过NPG共聚改性的PET的结晶能力随NPG用量的增加而降低，热收缩能力有了明显的提高；无定型区增大，获得了在通常情况下不能结晶的PET无定型材料，从而使改性PET薄膜在拉伸时保持较高的取向度，并在高于其Tg时发生解取向热收缩；拉伸温度、拉伸倍数等拉伸工艺对于聚酯薄膜的热收缩率有着显著的影响。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。