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平均结构参数     
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  average textural parameters
     Accordlng to Sadanaga, who has determined the average textural parameters of mullite (2Al_2O_3·SiO_2), the authors have proposed the average structural model of fused mullite (1.8 Al_2O_3·SiO_2). Furthermore, the relationship between the structure of mullite and its properties is described.
     借鉴Sadanaga测定莫来石(2Al_2O_3·SiO_2)的平均结构参数,提出了自烧结莫来石(1.84Al_2O_3·SiO_2)的平均结构模型,并概略地论述了莫来石结构与性能的关系。
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  “平均结构参数”译为未确定词的双语例句
     The results show that selected properties of both feedstocks are greatly different with carbon residues of 17.3% and 20.1% and heptane asphaltene content of 1.9% and 5.6% respectively. However, their structural parameters are quite similar, and 60%~80% of sulfur and nitrogen atoms are concentrated in resins.
     结果表明,虽然两种焦化原料的性质相差较大,如残炭质量分数分别为17.3%和20.1%、沥青质分别为1.9%和5.6%,但是它们的平均结构参数比较接近,60%~80%的硫氮原子富集在胶质组分中。
短句来源
     The average molecular structural parameters of subfraction were derived from ~1H and ~(13)CNMR coupled with molecular weight and elemental analysis data.
     由元素分析和平均分子量数据,采用~1H-NMR谱和~(13)C-NMR谱相结合的计算方法,获得了各馏分的平均结构参数
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。
短句来源
     The average structural parameters of each oil were calculated by the modified Brown-Ladner,n-d-M and E-d-M methods.
     采用改进的B-L法、n-d-M法和密度法计算了平均结构参数
短句来源
     In this study, 20 feedstocks, including 4 residues (from Daqing, Dagang, Gudao and Shengli crudes) and their deoiled asphalts with different yields by super critical fluid extraction was used.
     对大庆、大港、孤岛、胜利4种减压渣油及其经超临界流体萃取分馏得到的不同抽出程度的脱油沥青,共20种样品,测定了它们的元素组成、四组分组成、平均分子量和红外光谱,计算了它们的平均结构参数
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  相似匹配句对
     The Averaged Intensity Structure Determined by the Parameters of the Bottom-Reflection-Loss
     海底反射参数平均场强结构的控制
短句来源
     The average structural parameters of each oil were calculated by the modified Brown-Ladner,n-d-M and E-d-M methods.
     采用改进的B-L法、n-d-M法和密度法计算了平均结构参数
短句来源
     ANALYSIS OF CHEMICAL PROPERTY OF CRUDE OIL BY USING AVERAGE STRUC-TRAL PARAMETER
     应用平均结构参数对原油化学性质结构的分析
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     Using AFS algebra and AFS structure, any human ordinary fuzzy concept can be represented.
     结构
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     Compared the actuality of the structure of th
     *; 结构;
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  average molecular parameters
Average molecular parameters in the H3Co2 core of the molecule are as follows: Co-Co=2.275(21) ?, Co-H=1.637(16) ?, H?H=2.050(20) ?, Co-H-Co=88.0(9)°, H-Co-H=77.0(7)°.
      


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。

~1H-,~(13)C-NMR (including multi-pulse sequence spin-echo-technique) and FTIR spectroscopic methods are used to characterize aromatic fraction sin SRC from Fushun (FS) and Datong (DT) coals. The average molecular structural parameters and models for the samples studied are derived from ~1H-,~(13)CNMR spectra coupled with molecular weight and elemental analysis data. Results show that substantial distinction exists between the molecular composition and structure of aromatic fractions of two SRC samples.The aromatic...

~1H-,~(13)C-NMR (including multi-pulse sequence spin-echo-technique) and FTIR spectroscopic methods are used to characterize aromatic fraction sin SRC from Fushun (FS) and Datong (DT) coals. The average molecular structural parameters and models for the samples studied are derived from ~1H-,~(13)CNMR spectra coupled with molecular weight and elemental analysis data. Results show that substantial distinction exists between the molecular composition and structure of aromatic fractions of two SRC samples.The aromatic cluster of FS2 sample possesses openring structure with few aromatic rings (about 3 rings in a molecule) and abundant naphthenic groups.The aromaticity of aromatic fractions of both DT2A and DT2B samples is relatively high.The former has 4 rings with higher condensation degree (typical representa-tives are pyrene and fluoranthene homologues), whereas the latter is composed of six-ring cata-condensed polycyclic aromatics.

利用~(13)C-,~1H-n.m.r.(包括多脉冲自旋回波~(13)C-n.m.r.)及FT红外光谱对大同和抚顺两种煤的SRC芳烃馏份进行了分析。对芳烃样品的有关谱图进行了定性分析,并采用~(13)C-,~1H-o.m.r.联合推导平均分子结构的方法计算了各样品的平均结构参数。研究表明,两种煤SRC芳烃的组成结构有显著差别:抚顺SRC芳烃的芳核具有敞开式构型,稠合芳环数小(约3个),脂环发达。大同煤SRC衍生的两个芳烃馏份都具有较高的芳香度,其中DT-2A环数3-4,缩合度高,含较多的芘和荧蒽的同系物,DT-2B为6芳环的渺位缩合多环芳烃。

By means of the modified Brown-Ladner's method, the average structural parameters of the vacuum residues of several Chinese crude oils were calculated based on proton magnetic resonance spectroscopy combined with infrared spectroscopy, average molecular weight determination and elementary analysis. The results show that the parameters obtained are capable to reflect the average structure of the vacuum residues. In regard to the structural parameters of the fractions of residues, the aromaticity f_A increases,...

By means of the modified Brown-Ladner's method, the average structural parameters of the vacuum residues of several Chinese crude oils were calculated based on proton magnetic resonance spectroscopy combined with infrared spectroscopy, average molecular weight determination and elementary analysis. The results show that the parameters obtained are capable to reflect the average structure of the vacuum residues. In regard to the structural parameters of the fractions of residues, the aromaticity f_A increases, the fraction of paraffinic carbon f_p decreases, and the average molecular weight increases in the order or saturate, aromatic, resin and asphaltene accordingly, but the unit structure weights are very similar (~1000) for all fractions.

本文以核磁共振氢谱为基础,结合红外光谱及元素组成、平均分子量等数据,用改进的Brown-Ladner法计算了我国若干种主要原油的减压渣油及其组分的平均结构参数。结果表明:这些参数能定量地表征各种减压渣油在平均结构上的差别。就其组分而言,从饱和分、芳香分、胶质到沥青质,其芳碳率f_A依次增大,烷基碳率f_P依次减小,分子量依次增大,而单元结构重则变化不大,大体都在一千左右。

 
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