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  • The Analysis of Collocation

    Collocation,as an important category of lexical patterning in language learning,can objectively reflect people's competence of writing,organizing and expressing in English.This paper will mainly focus on what is collocation in English,as well as the analysis of the collocation from the source text.Then the paper will classify the different kinds of collocation according to the different limits or characteristic of these collocation occurred in the source text....

    2020-11-22 17:58:37浏览:29 CollocationGrammaticalcombinationsCollocationalrangeCultural-specific

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  • An rescaled range analysis on the characteristics of coal seam development in the Eastern depression

    The characteristics of coal seam development, and the prospects of a favorable coal-forming area, were evaluated for the Liaohe Basin located in China. The Number 3 and Number 9 coal seam thickness series from 60 nearly equally spaced bores in the Eastern depression of the Liaohe Basin were examined by a rescaled range analysis. The results indicate that the Hurst exponents of the Number 3 and Number 9 coal seam thickness series are 0.69 and 0.68, respectively. This suggests the presence of persistence. As the bore spacing increases the Hurst exponent of the Number 3 series gradually decreases (H changes from 0.69 to 0.52) and shifts from persistence to randomness. The Hurst exponent of the Number 9 thickness data gradually increases (H changes from 0.68 to 0.91) and always shows the characteristic of persistence. A combination of geological characteristics and the series data allow the conclusion that it is more suitable for the Number 9 coal seam to form in the Northeastern part of the Eastern depression than the Number 3 coal seam....

    2020-06-12 16:18:46浏览:1422 RescaledrangeAnalysisHurstexponentcoalseamthicknessEasterndepression

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  • 甲醇汽油的馏程特性研究

    低比例甲醇汽油的馏程特性试验研究结果表明:当甲醇含量不大于30%时,甲醇汽油的10%馏出温度普遍低于汽油;M5、M10甲醇汽油的50%馏出温度与汽油变化不大,M15、M20、M30甲醇汽油的50%馏出温度比90#汽油明显降低;甲醇汽油的90%馏出温度与90#汽油变化不大.甲醇含量不大于10%的甲醇汽油具有满意驾驶特性的馏程特性,含量不大于30%的甲醇汽油有较好的适用性....

    2020-06-12 14:47:09浏览:1418 甲醇汽油馏程特性适用性试验研究methanol-gasolinedistillationrangecharacteristicsSuitable

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  • 甲醇汽油的馏程特性研究

    低比例甲醇汽油的馏程特性试验研究结果表明:当甲醇含量不大于30%时,甲醇汽油的10%馏出温度普遍低于汽油;M5、M10甲醇汽油的50%馏出温度与汽油变化不大,M15、M20、M30甲醇汽油的50%馏出温度比90#汽油明显降低;甲醇汽油的90%馏出温度与90#汽油变化不大.甲醇含量不大于10%的甲醇汽油具有满意驾驶特性的馏程特性,含量不大于30%的甲醇汽油有较好的适用性....

    2020-03-17 17:31:21浏览:1416 甲醇汽油馏程特性适用性试验研究methanol-gasolinedistillationrange

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