分馏的

This model indicates that the sulfur isotopes, whose values tend to be negative fractionate to a large scale because of the reductive process of dissimilating bacteria of sulfate.

根据内蒙古乌达矿区高硫煤9煤层（有机硫同位素值 d 34 S=－12.3‰~5.8‰，黄铁矿硫同位素值 d 34 S=－18.7‰~1.1‰）和低硫煤13煤层（有机硫同位素值 d 34 S 为8.9‰~ 11.5‰，黄铁矿硫同位素值 d 34 S 为8.3‰~ 9.7‰）剖面上有机硫和黄铁矿硫同位素的组成，结合煤岩学特征的综合分析以及黄铁矿化菌落和蓝藻胶壳的发现，提出了高硫煤中硫的演化模式，认为高硫煤中硫的同位素由于硫酸盐的异化细菌还原作用导致硫同位素大规模分馏，使之趋于负值。

The operation and control interaction analysis between main fractionator and stabilizer of FCCU is given.

stabilizer control ； system design ；分析了催化裂化装置稳定塔的先进控制问题，讨论了主分馏塔与稳定塔之间操作控制的关联性，基于状态反馈预测控制，根据装置的操作运行情况及关联性分析，使用现有的测点，对稳定塔建立了用于实时控制的简化状态空间数学模型，以在线计算稳定汽油饱和蒸汽压作为被控变量，设计了稳定塔先进控制系统。

The δ〓S value of pyrite, sphelerite and arsonopyrite is in the range of 4. 0‰ and -4. 2‰ with the highest frequency occurring around zero, indicating a uniformed sulfur source. The large variation and mainly negative values (0.2‰～-11. 3‰) of δ〓S for stibnite could be interpreted by isotope fractionation. The carbon isotopic characteristics exhibit a mixing nature of magmatic carbon and organic carbon.

矿床中的热液成因黄铁矿、闪锌矿和毒砂的δ〓S＝4.0‰—-4.2‰，呈塔式分布，δ〓S集中在0附近，表明其成矿体系具有均—化硫的同位素组成，而辉锑矿的δ〓S变化范围较大(0.2‰—-11.3‰)，除一个样品外均为负值，这是硫同位素分馏作用的结果。

It\'s possibly that increase of hydraulic limitation with tree height influenced leaf water potential and turgor as well as leaf structure,which strengthened hydraulic limitation on leaf gas exchange characteristics including photosynthesis and transpiration rate, resultantly influenced carbon assimilation and CO_2 fractionation and increased water use efficiency and drought resistance capability.

应该是水力限制影响了叶片的水势和膨压、同时造成叶片的结构发生改变，而结构的改变加剧了水力对气体交换的限制、影响了光合碳同化以及对CO_2的分馏效应、使叶片的水分利用效率和抗旱性增强。

The naturally occurring stable carbon and nitrogen isotopes were used as tracers to study the influence of different ecological factors on the two isotopic compositions in different weever tissues under the control conditions in the metabolic process, and the stable isotope fractionation in weever tissues in metabolic process was used to study the flow pathway of nutrient and energy for food web in the ecological system.

利用天然存在的碳氮稳定同位素作为示踪剂，研究了在受控条件下驯养的鲈鱼的新陈代谢过程中不同生态因子(水温、摄食水平、体重等)对鲈鱼体内不同组织的碳氮稳定同位素组成的影响。通过鲈鱼新陈代谢过程中的稳定同位素分馏作用，研究了在生态系统食物网中的物质与能量转换规律。

Sulfur corrodible sites and their characteristics were introduced of the prefractionation system, air preheaters of heating furnace and product air coolers etc,and chlorine corrodible sites and their characteristics were also presented of the thermocouple casing tubes, product air coolers and fire arrestors of heating furnace etc in the catalytic reforming and diesel hydrogenated unit s.

介绍了中国石油哈尔滨石化公司催化重整及柴油加氢装置在预分馏系统、加热炉空气预热器、加氢装置反应产物空冷器等处易发生硫腐蚀和在预加氢热偶套管、加氢反应产物空冷器、加热炉阻火器等处易发生氯腐蚀的部位及其表现特征，指出装置在低温(不高于120℃)、含水、容易被堵塞的部位易形成HCl-H2S-H2O腐蚀体系，分析了腐蚀原因和介质来源，总结和提出了开好原油的电脱盐、采用脱氯技术、加强对加热炉的排烟温度控制和腐蚀介质的精制与净化、加大空冷器的注水量等针对性防腐经验和措施。

It is determined that the contents and distribution of pyrrolic compounds and dibenzothiophene are controlled by oil fraction during migration, which has potential significance in evaluating the oil migration and reservoir Filling direction.

杂环芳烃中的吡咯类化合物和二苯并噻吩具有显著的油气运移分馏效应，可以作为有效的油气运移与油藏充注方向的分子级示踪参数。

The oil yield of six types of Huadian oil shales were measured on a Fischer assay retort,and the factors which effected the results of Fischer assay of oil shale were investigated,such as heating rate,particle size,final retorting temperature and retorting persistent time.

结果表明，页岩油的产率随着挥发分含量的增大而增加，在一定范围内提高升温速率，页岩油产率增大，但升温速率过快，反而使页岩油产率降低；终温在500℃~510℃，持温时间20 min的条件下，产油率最高，继续增加干馏终温和持续时间对产油率影响不大；同时适宜的粒度可以适当提高页岩油的产率。

The source of the asphalt and the crude oil are homogeneity in some way, but lanthanon fractionation of the asphalt is relatively high. So it can show that the asphalt is higher than the evolution degree of crude oil. Origin has also variety, some samples maybe exert deep fluid.

表现出两者在来源上具有某种程度上的同源性，但沥青的稀土分馏程度较石油大的多，由此表明沥青的演化过程较石油更复杂。

After the comparation with the experimental results of these four catalyzers,we declare that C-4 is a catalyzer of good catalytic activity and good recovery ratio.The mixed oil抯 recovery ratio is up to 71.46%,65.OO% and 50.OO%.After fractional distillation gasoline and diesel come up to 90 and 0抯 standard by the test of Kunming Product Quality Inspection Bureau.

将这四种催化剂的实验结果进行对比分析，判定C-4是一种裂化活性好、油品收率高的催化剂，在C-4 催化剂的作用下，三种原料的混合油出率分别达到71.46％、65.00％、 50.00％，混合油分馏出的汽油、柴油经昆明市产品质量监督检验所检验，分别达到90号和0号的标准！

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。