查询词典 cracking

The experiments for determining the mechanism and kinetics of catalytic pyrolysis reaction for a simple petroleum feedstock, were carried out in a batch micro-reactor using Daqing light gas oil. The results showed that carbonium and free radical reactions were the key reactions in catalytic pyrolysis. The carbonium ions were induced by catalytic reaction, whereas free radical reaction was predominantly due to thermal cracking.

首先在重油微反装置上考察大庆减压馏分油催化裂解反应产品分布，并将反应结果与相同温度范围内的热裂解反应相比较，二者的产品分布随温度等操作参数的变化规律明显不同，进而推断催化裂解反应过程为正碳离子反应机理和自由基反应机理并存；并建立了大庆减压馏分油催化裂解消失动力学模型，求得了化学反应速率常数。

The results show that the fine carbonous particles restrain coke formation during thermal cracking of residue oil .

实验结果表明，反应初期碳质颗粒在一定程度上抑制渣油的热反应生焦。

In near-neutral pH solution, the cracking mode is transgranular with the feature of quasicleavage.The function of SCC factors are as follows:(1)The additional potential takes an important role in the SCC behavior of X70 pipeline steel: the susceptibility to SCC increased with decreasing cathodal potential,HIC is the dominant reason,the crackles on the surface are almost vertical to stress;On the country, at anodic potential,there is a critical potential,below which the dominant reason is anode-dissolving supported by hydrogen,and the crackles on the surface are not vertical to stress.

电位因素和环境因素的影响作用为：(1)在阴极极化电位区，SCC敏感性随电位的负移而增加，氢致开裂作用占主导，表面裂纹多与拉应力垂直；在阳极极化区间，存在阈值电位，低于阈值电位时，SCC为氢促进阳极溶解所致，表面裂纹多与主应力方向成一定角度。

The stress corrosion cracking susceptibility of steel 34CrNi3Mo with different yield strength grades in 30% NaOH aqueous solution at 80℃ has been examined by the measurement of their K_ either at open circuit potential (-1050mV) or cathodically polarized at-1400mV.

通过不同强度等级的34CrNi3Mo钢在80℃，30％NaOH水溶液中开路电位(-1050mv)及-1400mv恒电位阴极极化条件下K_的测定，探讨强度对低合金钢SCC敏感性的影响。

A two-step method of causticization and precipitation technology was used to revive spent caustic of ethylene cracking, and various conditions which affect regeneration efficiency of the reaction were studied.

采用苛化及化学沉淀两步工艺对乙烯裂解废碱液的再生进行了研究，考察了影响再生效果的各种条件因素。

The macroscopic shrinkage of cementitious materials often causes cracking when it is used as paving material and reduces its durability.

水泥基路面材料在使用过程中常会发生明显的体积收缩趋势，在结构中引起收缩裂缝，降低路面结构耐久性。

When skin is extremely dry and dehydrated, signs like chapping and cracking appear.

当皮肤非常干燥，脱水，标志一样chapping和打击出现。

Pat your skin rather than rubbing to avoid chapping and cracking.

揉搓你的双手至少20秒钟。

Pat your skin rather than rubbing to avoid chapping and cracking.

轻拍你的肌肤，而不是揉搓，这样可以避免皮肤皲裂或开裂。

Double moisten,complement water effectively and prevent to lose water, also can decrease the lip hair-cracking , make your lips soft and charmful.

双重滋润功效，有效补充水分并防止水分散失，可减少唇部细纹，令嘴唇柔润丰盈。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。