馏分

Heavy oil distillation column ; chaotic neural network ; Laguerre function ; predictive control ; adaptive control

重油分馏塔；混沌神经网络； Laguerre函数；预测控制；自适应控制

Carbon isotopic discrimination Δ~(13C of fossil Liquidambar is mainly related toenvironmental factors, such as irradiation, temperature, other than atmospheric CO_2concentration and water availability.

校正后的化石枫香碳同位素分馏值△~(13C受环境因素的综合影响，可能来自于光照、温度等，但是与大气CO_2浓度和水分没有关系或关系很小。

In all cases, the data plot near or to the left of the lithification reference domain Fig.

这些同位素分馏过程可以在流体流动的过程中同时发生。

In this 'lithification' process, the originally precipitated phases undergo dissolution, reprecipitation, and isotopic re-equilibration with ambient pore fluids.

在这个所谓的岩化过程，最初沉淀的沉积物经历了溶解，再沉淀，与周围孔隙中的流体进行的同位素再平衡分馏等过程。

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。

We tested the following items every two hours before and after those nitrobacteria worked,respectively,i.e.,ammonium,nitrite,nitrate and the δ13C values of dissolved organic matter.

有机质矿化分解过程中，碳同位素经过化学反应、蒸发、扩散和生物化学等过程发生同位素分馏，δ13C值发生相应的变化[4，13]。

Following the development of the copper cup-electrode solution method for the spectrogra-phic analysis of open-hearth slags,a series of experiments was carried out to study the volatili-zation process in such a spectral light source.

第一阶段相当于第一高峯出现的期间，在这时并没有分馏现象，这表示溶液中的物质主要是经过溶液的翻腾作用而直接从液面进入放电区的。

3Asphalt fractionated by evaporation results from the mixing of light paraffin series generated in the later stage and normal or heavy oils generated in the earlier, resulting in the precipitation of asphalt from liquid oil because of the unstable state.

燕发分馏沥青是指晚期生成的轻质石腊族烃与早期生成的正常原油或稠油相混，造成不稳定状态，造成沥青从液态石油中析出。

In order to determine the content of hydrocarbons and halohydrocarbons in uranium hexafluoride,the first step is to passivate the inlet system and ion source of mass-spectrometer.

了测定六氟化铀中烃和卤代烃的含量，首先要对进样系统和质谱计的离子源进行充分的钝化。样品必须全部汽化后方可通入质谱计，否则分馏效应将严重歪曲测量结果。

The process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process).

把石油重分子分解成低分子碳氢化合物的过程；把石油分子分解成更小的分子并提取低沸点的分馏部分的过程。

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。