结晶

The optimum conditions were obtained as follows: the weight ratio of fatty acids and 85%acetic acid is 1:4, ozonolysis temperature is 20-25℃, manganese/copper acetate as catalyst, and the amount of catalyst is 0.15% of fatty acids, oxidation decomposition temperature and oxidation decomposition time are 90-95℃ and 4 hours respectively. the yields of azelaic acid and pelargonic acid are 57.4% and 51.6% respectively.

以菜油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、重结晶等过程制备壬二酸和十三烷二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度80-85℃，催化剂醋酸锰/醋酸铜用量为原料菜油酸质量的0.12%，氧化分解时间3h，重结晶溶剂壬酸的用量为5倍质量的氧化分解产物时，十三烷二酸的收率为58.3%，壬二酸的收率为57.2%。

Based on the summarization of current situation of fluorine-free mould fluxes at home and abroad,the main problem during decreasing fluorine for high carbon steel and peritectic steel mould fluxes was analyzed,which includes the stability between viscosity and temperature at high temperature as well as effective control of crystallization properties .

综述了国内外无氟连铸结晶器保护渣发展状况，分析了目前高碳钢和包晶钢用保护渣降氟过程中面临的主要问题：高温时粘度-温度特性的稳定性以及保护渣结晶性能的有效控制。

While in photoreduction of Cr , the titania-modified MCM-41 photocatalysts were more photoactive than the titania-silica composite (25％ TiO〓).

在光催化降解苯酚中氧化钛修饰MCM-41的光催化活性虽然不及结晶的锐钛矿相纳米氧化钛，但是仍具有较高的催化活性；在光催化还原Cr到Cr反应中氧化钛修饰MCM-41的光催化还原性明显高于部分结晶的TiO〓-SiO〓（25wt％TiO〓）复合氧化物。

Suitable for material identification、analysis、pleomorphic crystallization and determination of crystallinity.

适合于物质鉴定、解析、多形结晶和结晶度的测定与管理。

However, analysis results of SEM, WAXD, and mercury porosimeter demonstrated that the granule\'s topological morphology, crystal form and porosity were almost intact after the annealing treatment.

退火处理只是引起原生态聚丙烯粒子部分熔融和再结晶，使得结晶缺陷或者不完善部分趋于完善，其中150℃退火处理的效果最为明显。

In this paper the optimal conditions for sublimate crystallization refining of pyromellitic dianhydridewas studied,and on the basis of PMDA equilibrium vapor pressure under the contant temperature,the mathematical correlation for sublimate crystallization conditions was deduced.

研究了均苯四酸二酐凝华结晶精制的最佳条件，并以均酐在定温下的平衡蒸汽压为基础，推导出凝华结晶条件数学关系式。

The results show that dendrites in casting are converted into directional micro-crystals, and then recrystallize and grow into spheroidizing grains.

结果表明：铸造状态下的树枝状组织在挤压预热过程中形成了带有方向性的小结晶，之后再成长为显微结晶，观察到了变化为球状的结晶粒。

It was also found that Nb+Ti microalloyed steel(0.02%Nb＋0.012%Ti ) is more difficult to recrystallize when coiled at 600℃.

低温（600℃）卷取时，铌钛复合微合金化钢的退火再结晶更难，800℃×30s连续退火可以保证完全再结晶。

The welding nugget happened to dynamically recrystallize and the refined crystal grains were obtained and the majority of Mg_2Si particles dissoluted due to the intensive mechanical stir and higher high temperature. In the thermal-mechanical affect zone that was heated under the recrystallized temperature, the crystal grains were elongated due to the mechanical stir and Mg_2Si particles partly dissoluted and the others grew. In the heat affect heat without the mechanical stir, to some extent, both of the crystal grains and the majority of Mg_2Si particles grew.

焊核区受到强烈机械搅拌作用和加热到较高的温度发生动态再结晶，得到细小等轴晶组织，Mg_2Si相以溶解为主；热机影响区加热温度低于再结晶温度，在机械搅拌作用下晶粒由于塑性变形而伸长，Mg_2Si相部分溶解，部分长大；热影响区仅受加热影响，晶粒有一定程度长大，Mg_2Si相以长大为主。

Wide angle X-ray diffractometer was used to investigate the formation of crystal structure of Lyocell fiber and the difference of crystal structures between never dried Lyocell fiber and rewet Lyocell fiber.

利用广角X-衍射分析技术，对从未干燥过的初生Lyocell纤维结晶结构的形成过程进行了研究，并与已干燥过的重新湿润的Lyocell纤维的结晶结构进行了对比。

It was Napoleon, the immense somnambulist of this dream which had crumbled, essaying once more to advance.

那人便是拿破仑，梦游中的巨人，他还想往前走，去追寻那崩塌了的幻境。

This method alleviates the highly dependent on domain knowledge experts. The quality and efficiency of the KBS were improved.

使用这种设计方法减小了对领域知识专家的严重依赖，提高了知识系统开发的质量和效率。