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平均分子结构
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  average molecular structure
     A FACTOR CHARACTERIZING AVERAGE MOLECULAR STRUCTURE OF HEAVY OILS
     一个反映重油平均分子结构的特征因数
短句来源
     it is found from the calculated KL values for various oils and pure hydrocarbons that KL reflects average molecular structure of oils and it decreases with the increase of average molecular weight of heavy oil.
     考察了不同油品和纯烃的KL值,认为几值对于油品平均分子结构的反映是准确的,随重油的平均相对分子质量增大而降低。
短句来源
     AVERAGE MOLECULAR STRUCTURE DETERMINATION OF PETROLEUM HEAVY ENDS AND ITS APPLICATION
     重油平均分子结构测定及其应用
短句来源
     The average formula and the average molecular structure of the two samples were infered.
     确定了1#和2#样平均分子式和平均分子结构
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     Distillation curve is for description flowing distribution of liquefaction oil. Average molecular structure parameters of liquefaction oil are calculated based on the data obtained from high resolution H-NMR technique.
     由常减压蒸馏方法得到的蒸馏曲线用于描述液化油的馏程分布,H-NMR方法给出液化油的平均分子结构参数.
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  “平均分子结构”译为未确定词的双语例句
     Both HI-pS and BI-PS were characterized by IR and HNMR.
     借助于IR和 ̄(1)HNMR表征了HI-BS及BI-PS族组分的平均分子结构
短句来源
     This paper presents a method which can determine the average mol- ecular structural parameters of crude oil and bitumen by ~(13)C and ~1H NMR.
     本文提出一个用 ~1H 和 ~(13)C NMR 测定原油和沥青平均分子结构参数的方法。
短句来源
     The comparison of structural parameters calculated by ~1HNMR/IR, Brown-Ladner and n-d-M methods were carried out for the six heavy oils. Itis proposed that ~1HNMR/IR method can get more precise average molecular parameters than the Brown Ladner method.
     对三种不同的方法测定重质油结构进行比较,结果认为~1HNMR/IR法相对于Brown-Ladner法可以得到更为准确的平均分子结构参数。
短句来源
     H and 13C nuclear magnetic resonance (NMR) spectra of two kinds of endothermic hydrocarbon fuels were determined. The average structural parameters were obtained by combined 1H and 13C NMR and the experimental relative molecular mass.
     测定两种吸热型碳氢燃料的1H和13 CNMR谱 ,从NMR等实验数据计算得到平均分子结构参数。
短句来源
     Average molecule structure model of the oil and asphaltene fractions have been drawn out, in according to colligating the data of instrumental analysis and calculating average structure parameters of the two fractions.
     综合仪器分析的结果,计算出油和沥青烯分子的平均结构参数,从而绘制出油和沥青烯的平均分子结构模型。
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  相似匹配句对
     The Molecular Structure of Polyacrylonitrile
     聚丙烯腈的分子结构
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     Molecular Structure of urushiol
     漆酚的分子结构
短句来源
     Using AFS algebra and AFS structure, any human ordinary fuzzy concept can be represented.
     结构
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     10 ?
     分子
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     Compared the actuality of the structure of th
     *; 结构;
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  average molecular structure
Molecular Evolution: Automated Manipulation of Hierarchical Chemical Topology and Its Application to Average Molecular Structure
      
These have been used, in conjunction with recent results for ketene, to determine the harmonic potential function for thioketene and the zero-point average molecular structure.
      
Stacking of the TRCDA layers beyond trilayer structures would reduce the average molecular structure measured in the pressure-area experiments.
      


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本文记述了对玉门原油各润滑油馏分性质的研究结果.各馏分是由脱沥青的玉门全润滑油镏分经过实沸点蒸馏,高真空蒸馏,酚精炼,丙酮、甲苯、苯脱蜡及白土处理等步骤而取得的窄馏分.另外对各阶段处理后的油的性质进行了分析.这些结果阐明了玉门原油在制取润滑油上有它的一些有利条件,作为普通的各种润滑油的原料是很合适的;但另一方面,也有它的缺点,就是粘度指数较低.平均分子结构的分析表明,玉门润滑油主要是由多环而侧链短之成分所组成的;经溶剂分析也得知其中高粘度指数成分较少,只有在低收率时方可获得一部分粘度指数为84—88的航空机油.唯此时一部分抽出油质量很好,可用作普通的机油.

By the use of solvent extraction and liquid chromatography for separation and followed by combined ~1H-NMR-IR spectroscopy, the average molecular structures of separated fractions of some domestic petroleum heavy residues have been studied.Taking the absorption E_(1380)cm~(-1) and E_(2920)cm~(-1) from the IR spectra and the empirical equations proposed by Yen and Haley, the H_(CH_3), H_(CH_2) and corresponding C_(CH_3) , C_(CH_2) were calculated.The more accurate value of X might be approximately estimated therefrom....

By the use of solvent extraction and liquid chromatography for separation and followed by combined ~1H-NMR-IR spectroscopy, the average molecular structures of separated fractions of some domestic petroleum heavy residues have been studied.Taking the absorption E_(1380)cm~(-1) and E_(2920)cm~(-1) from the IR spectra and the empirical equations proposed by Yen and Haley, the H_(CH_3), H_(CH_2) and corresponding C_(CH_3) , C_(CH_2) were calculated.The more accurate value of X might be approximately estimated therefrom. On this basis, the average structural parameters of various generic fractions were obtained by generally accepted Williams and Brown-Ladner equations and the average molecular structural models of these fractions were designed.The consistency between the structural parameters of combined ~1H-NMR-IR method and the Densimetric method by van Krevelen shew that the densimetric statistical method remains a simple and accessible method for structural analysis, but more information can be got from ~1H-NMR -IR method.

本文研究了五个国产重质油和沥青样品的族组份和其结构。采用溶剂萃取和液体色谱结合的分离流程,将样品分成饱和烃和各种芳香馏份F_2、F_3,F_4以及苯可溶沥青质等馏份。根据红外光谱1380、2920cm~(-1)特征峰之吸光度和有关公式算出C_(?),从而较准确地估算出X值。在此基础上结合~1H-NMR、VPO分子量和元素分析等有关数据,求得五个油样中的11个馏份的平均结构参数和相应的平均分子结构模型。

By using solvent extraction and liquid chromatography,the genericcompositions of some typical petroleum heavy residues were determinedand the separated generic fractions were subjected to average molecularanalysis by combined~1 H-NMR-IR method proposed by the present authorsrecently.Subsequently,these raw residues were pyrolyzed under mild con-ditions,i.e.410℃ and 20kg/cm~2 of nitrogen pressure,until the mesophasetransformation was completed in the liquied phase.On the basis of the experimental results the pyrolysis...

By using solvent extraction and liquid chromatography,the genericcompositions of some typical petroleum heavy residues were determinedand the separated generic fractions were subjected to average molecularanalysis by combined~1 H-NMR-IR method proposed by the present authorsrecently.Subsequently,these raw residues were pyrolyzed under mild con-ditions,i.e.410℃ and 20kg/cm~2 of nitrogen pressure,until the mesophasetransformation was completed in the liquied phase.On the basis of the experimental results the pyrolysis reaction chara-cteristics of all generic fractions in a given sample and the origin ofcertain optical mesophase morphologies were analysed.The main conclu-sions are given as follows:1.The heavy generic fractions such as benzene insoluble but quinolinesoluble component are the main origin resulting in the occurrence ofsmall sized isochromatic units in the transformed mesophase morphologies.From the viewpoint of prevailing formation of long range preferentialorientation of giant carbon hexagonal layer-like molecules in the meso-phase textures,the amount of BI-QS component should be restricted to be-low 10% of the whole pitch samples.2.The strongly developed substitution by alkyl side chains on thepolycyclic nuclei of aromatic and resin molecules greatly increases itsthermal reactivity during pyrolysis which subsequently lead to the de-crease of planarity of highly condensed aromatic polycyclic molecules andfinally to enhanced content of the mozaic texture formed in the pyroly-sed solid residue.Stabilization of the aromatic radicals formed in the ini-tial stage of pyrolysis by free hydrogen atoms results in the formation ofthermally stable unsubstituted PAH or methyl PAH molecules which du- ring its subsequent condensation-polymerization will be transformed intotypical Brooks-Taylor mesophase spherules.3.Those generic components having multiple structural units in itsaverage molecules such as ethylene tar residue BS fraction give typicalcoarse mozaic morphology when carbonized individually but they form moreordered mesophase textures when it is co-carbonized with light fractionof the same raw residue.Consequently the ethylene tar residue BS com-ponent molecules initially may be broken into individual PAH free radi-cals by bridge-chain(CH_2)-bond dissociation.Then these PAH radi-cals are stabilized by free hydrogen atoms or small aromatics from lightcomponents coexistent in the raw residue.These newly formed stable la-yer molecules may serve as the precursor for subsequent nucleation andgrowth of large size Brooks-Taylor mesophase spherules.

用溶剂抽提、液体色谱法以及红外光谱、核磁共振氢谱等方法综合测定了若干渣油和沥青的族组成和平均分子结构。再以同样原料分别在压力及410℃(或430℃)下热解直到中间相转化达到完全。炭化样品用偏光显微镜测定了组织形态的定量分布。在此基础上,综合分析了原料样品中之有关族组份,在全馏份中和其他轻组份共炭化条件下分子结构的热解机理,以及对生成特定光学组织形态的相互关系。

 
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