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Using mordern physical chemistry techniques (such as XRD、 TG-DTA、 IR、 XPS and 〓Xe-NMR)、 chemical adsorption techniques (NH〓-TPD、 H〓-TPD、 TPO、 TPR etc.) and pulse flow microreaction of n-hexane、 methylcyclopentene and n-hexane containing 0.2ppm thiophene, we studied mainly the following three points:(1). the changes occured during the calcination pretreatment of Pt ammine complex supported on β and L zeolites;(2). the effect of structure and acidity-basicity of zeolite on the dispersion and electron state of Pt particles; and (3). the influence of second metal component on the reactivity of nhexane aromatization and sulphur-resistance of Pt/L zeolite catalyst. Several interesting and valuable results are obtained and summerized as follows

本论文运用各种近代物理表征方法(XRD、BET、TG-DTA、IR、XPS和〓Xe-NMR)、化学吸附技术(NH〓-TPD、H〓-TPD、TPO、TPR等)和正己烷、甲基环戊烷及含噻吩正己烷的脉冲微反等方法,着重研究了(1)载Pt的β和L沸石在分解预处理过程中发生的变化;(2)沸石载体结构及酸碱性对Pt粒子分散及电子状态的影响;(3)第二金属组份对载Pt沸石催化剂上正己烷芳构化及抗硫性能的影响等,得到了某些有意义的结果。

The relationship among three ensemble s (microcanonical ensemble ,canonical ensemble ,and grand canonical ensemble ) was discussed by means of derivation of distribution function,calculation of partition function,clarification of the basic thermodynamics as well as the fluctuations of particles in order to get profound cognition of these three ensemble s.

从三则系综(微正则系综、正则系综和巨正则系综)分布函数的推导,配分函数的计算,基本热力学量的表达及能量、粒子数的涨落等方面来讨论三则系综之间的关系,以便更深刻地认识三则系综之间的关系、灵活运用三则系综来解决实际问题。

In the initial stage, there is little ice particles, and the rain water form mainly through the collection of cloud water and auto-conversion process. In the growing and mature stage, both the cold and warm rain processes are important. The collections of rain water and graupel with cloud water and the melting of graupel are very important to the rain water. Graupel grows mainly through riming cloud water and colleting snow.

在上述成功模拟的基础上,又对γ中尺度对流系统作了探讨发现,γ中尺度对流系统在不同发展阶段的微物理机制不同:初生阶段时,冰相粒子含量较少,雨水的增长以暖雨过程为主,即依赖碰并云滴和云雨自动转化形成;发展和成熟阶段时,冷雨和暖雨过程并存,雨、霰碰并云水和霰的融化对雨水的形成非常重要,霰主要通过淞附和霰碰并雪增长,雪主要通过淞附增长。

They are mindless particles, after all, and not even themselves alive. It is a slightly arresting notion that if you were to pick yourself apart with tweezers, one atom at a time, you would produce a mound of fine atomic dust, none of which had ever been alive but all of which had once been you.

毕竟它们是没有灵魂的粒子,根本算不上活着(有个有趣的想法就是,如果把自己分解,用镊子一次夹出一个原子,将会有一大堆的原子微尘,它们当中没有一个曾活过,但又都曾是你的一部分)。

Since the established QGP effective perturbation theory is tangibly used, we have obtained the relation for the first time between QGP thermodynamics and Debye mass and width of particles in a simplified case.

最后,作为我们所建立的QGP有效微扰论的具体应用,首次得到了在较简单情况下的QGP热力学与Debye质量和粒子宽度的关系。

The silica/Polystyrene monocore-shell nanocomposite particles(95nm in diameter) were synthesized through miniemulsion polymerization by using sodium dodecyl sulfate surfactant,hexadecane costabilizer in the presence of silica particles(50nm in diameter) coated with methacryloxytrimethoxysilane.

采用细乳液聚合法,以3-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)表面改性的直径50nm的氧化硅粒子为核,在乳化剂、助乳化剂、引发剂存在的情况下制备了小粒径、单核核壳结构氧化硅/聚苯乙烯纳米复合微球。

In the framework of Feynman diagram calculation, two pieces of work were accomplished with thestandard application of perturbative manipulation of radiative corrections.

最小超对称标准模型,是粒子物理标准模型之外的新物理的最有希望的理论之一。为检验这种模型,有必要进行一些高阶的微扰论计算。

Based on observations in northern China, the microphysical process of precipitation formation and the role of ice crystal playing in those processes for three kinds of typical stratiform clouds are analyzed using rain category model.

通过建立层状云雨滴的分档模式,对中国北方常见的三类典型层状云降水形成的微物理过程以及冰粒子在降水形成中的作用进行了数值模拟。

BaWO_(4) nanoparticles of wire,rod,and hollow spherical shapes were prepared in different microemulsion systems with octane as the oil,and undecylenic acid and/or dodecylamine as the surfactants.

在十一烯酸和十二胺作表面活性剂、正辛烷为油形成的油包水型微乳液体系中,通过调节体系的组成,使Na2WO4和BaC l2发生反应,分别制得了丝状、棒状和空心球状的BaWO4纳米粒子。

In this dissertation, based on glass microspheres and submicron silicon dioxide, the silver-coated core-shell shielding particles were prepared by liquid phase chemical deposition and layer by layer packing technology. The influences of the preparation conditions on the structure of the synthesized core-shell particles were also systemically studied. The conclusions are enumerated as follow:(1) Monodispersed submicron silicon dioxide spheres in the size range of 250~550 nm are synthesized by Sol-Gel method using ammonia as catalyst.

本文在前人研究的基础上设计出以微米级玻璃微珠为基核,采用液相化学沉积法和层层包裹法制备表面包银的核壳粒子电磁屏蔽剂,并对液相化学沉积法和层层包裹法的制备工艺进行了系统研究,取得了以下主要结论:(1)以氨水作催化剂,采用溶胶-凝胶法制备了粒径分布在250~550 nm之间的二氧化硅微球。

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推荐网络例句

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了,请告诉我,我会帮助你摆脱困境,真的,请联系我啦!

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放,就是一个这样的例子。

Well, Jerry would rattle off all the details of that movie.

那么,杰瑞会急促背诵那部电影所有细节。