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作者： (美)阿文(kevin smith)

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氧化钡促进的Co/SiO_2催化剂的还原性能和分解甲烷活性

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催化学报 2003年第1期24卷 61-66页

作者：李小年刘化章张毅 kevin J.smith 浙江工业大学催化研究所浙江省多相催化重点实验室浙江杭州310014 Department of Chemical and Biological Engineering University of BritishColumbia

利用等体积浸渍法制备了氧化硅负载钴催化剂 .通过程序升温还原、氢化学吸附、氧滴定和催化活性评价等手段研究了氧化钡对Co/SiO2 的还原性能、钴分散度和颗粒度、分解甲烷活性及其稳定性等的影响 .研究结果表明 ,氧化钡明显地影响Co/Si... 详细信息

利用等体积浸渍法制备了氧化硅负载钴催化剂 .通过程序升温还原、氢化学吸附、氧滴定和催化活性评价等手段研究了氧化钡对Co/SiO2 的还原性能、钴分散度和颗粒度、分解甲烷活性及其稳定性等的影响 .研究结果表明 ,氧化钡明显地影响Co/SiO2 的还原性能 ;添加 2 %氧化钡提高了Co/SiO2 在中温 (4 5 0℃ )条件下的还原度 ;氧化钡的还原对Co/SiO2 还原的诱导、氧化钡与氧化硅及与氧化钴之间的相互作用是导致Co/SiO2 还原性能变化的原因 .氧化钡提高了Co/SiO2 的初活性和钴的分散度 ,降低了钴的颗粒度 ;添加 0 5 %～ 1 5 %氧化钡有利于提高Co/SiO2 的稳定性 .钴的分散度和颗粒度影响Co/SiO2的活性和稳定性 ;氧化钡的强供电效应也是提高Co/SiO2 活性和稳定性的重要因素 .甲烷分解生成的碳物种覆盖了钴活性中心 ,导致Co/SiO2 初活性下降 ;但大部分碳物种并不沉积在钴活性中心上。

关键词： Co/SiO2催化剂钴氧化硅氧化钡负载型催化剂还原性能甲烷分解碳纤维催化活性

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Hydrodeoxygenation of Phenolic Model Compounds over MoS2 Catalysts with Different Structures

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Chinese Journal of Chemical Engineering 2008年第5期16卷 733-739页

作者：杨运泉罗和安童刚生 kevin J. smith TYE Ching Thian Department of Chemical Engineering Xiangtan University Xiangtan 411105 China Department of Chemical and Biological Engineering University of British Columbia Vancouver B.C V6T 1Z3 Canada

Several MoS2 catalysts of different structure, prepared by in situ decomposition of ammonium heptamolybdate （AHM） and molybdenum naphthenate （MoNaph）, and by MoS2 exfoliation （TDM）, were characterized by BET, X-ray diffraction （XRD）, Energy Dispersive X-ray （EDX） and transmission electron microscopy （TEM）. The analysis showed that MoS2 structure was dependant upon the preparation procedure. The activity of the catalysts was determined by measuring the hydrodeoxygenation （HDO） of phenol, 4-methylphenol and 4-methoxyphenol using a batch autoclave reactor operated at 2.8 MPa of hydrogen and temperatures ranging from 320-370℃. By comparing the conversion, the reactivity order of the catalysts was： AHM〉TDM-D〉MoNaph〉thermal〉MoS2 powder〉 TDM-W. Also, the effect of reaction temperature on the HDO conversion was explained in terms of equilibrium of reversible reaction kinetics. The main products of the HDO for phenolic compounds were identified by gas chromatography/mass spectrometry （GC/MS）. The results showed that the product distribution and the HDO selectivity were correlated with the reaction temperature. Two parallel reaction routes, direct hydrogenolysis and combined hydrogenation-hydrogenolysis, were confirmed by the analysis of the product distribution. High temperature favored hydrogenolysis over hydrogenation for HDO of phenol and 4-methoxyphenol, whereas for 4-methylphenol the reverse was true.

关键词： ammonium heptamolybdate derived MoS2 structure effect characterization hydrodeoxygenation reactivity product distribution

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Role of phase separation in nanocomposite indium-tin-oxide films for transparent thermoelectric applications

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Journal of Materiomics 2021年第3期7卷 612-620页

作者： Peter P.Murmu Akhil Shettigar Shen V.Chong Zihang Liu Dana Goodacre Vedran Jovic Takao Mori kevin E.smith John Kennedy National Isotope Centre GNS SciencePO Box 30368Lower Hutt5010New Zealand The MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand Robinson Research Institute Victoria University of WellingtonPO Box 33436Lower Hutt5046New Zealand International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbaraki305-0044Japan School of Chemical Sciences University of AucklandAuckland1142New Zealand Department of Physics Boston University BostonMA02215USA

We report that oxygen vacancies have a profound impact on phase separation and thermoelectric properties of ITO films grown at room *** vacancies in non-stoichiometric In1.8Sn0.2O2.5 films aided the formation of In-rich metallic *** yields a high electrical conductivity s=1540 Scm1 and Seebeck coefficient|a|=27.2 mVK1,which resulted in the highest power factor(a2 s=113.8 mW m1 K2)but low optical transmission(Top-25%).An increase in oxygen partial pressure resulted in stochiometric In1.8Sn0.2O3 films which improved the optical transparency by 300%(Top-75.4%),but power factor was reduced by-85%due to a decrease in a and s.A decrease in a was due to the lack of energy filtering of charge carriers in the stoichiometric ITO film which did not have In-rich metallic *** results showed that the valence band energy shifts with a change in oxygen partial pressure due to a decrease in carrier density,which implied a change in Fermi energy due to the reverse Moss-Burstein *** results showed that phase separation can be obtained in nanocomposite ITO films by tuning their stoichiometry simply by varying the oxygen partial pressure during deposition of thermoelectric materials at low temperatures.

关键词： Thermoelectric Indium-tin-oxide(ITO) Seebeck coefficient Power factor X-ray photoelectron spectroscopy(XPS)

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The Impact of Turbulence on MANET FSO Networks Using NS-3

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Journal of Computer and Communications 2022年第10期10卷 162-171页

作者： Lamiae Bouanane Fouad Mohamed Abbou Farid Abdi kevin smith Abdelouahab Abid Faculty of Sciences and Technologies Sidi Mohamed Ben Abdellah University Fes Morocco School of Science and Engineering Al Akhawayn University Ifrane Morocco Information Technology Islamic University of Medina Saudi Arabia Medina Kingdom of Saudi Arabia

In this paper, the impact of atmospheric turbulence is investigated and analyzed for the Free Space Optical Mobile Ad Hoc Networks (FSO MANET) using the Network Simulator NS-3. The FSO channel random intensity fluctuations have been modeled using the Exponentiated Weibull (EW) distribution. Further, the FSO module has been implemented and integrated with NS3 using the FSO propagation model and the FSO error models. The computation of the key performance indicators (KPI) mainly the throughput and the packet delivery ratio (PDR) shows that the network density affects the network performance. Its effect was illustrated for the different turbulence regimes, strong and weak. It is found that the throughput and PDR values decrease as the number of mobile nodes becomes larger. For instance, at 150 kbps and in the presence of strong turbulence with 25, 50, and 75 nodes, the PDRs are 77%, 76%, and 73% respectively. Moreover, the throughput and PDR values in the strong turbulence regime are lower than those in the weak turbulence regime for the same date rate. The throughput in the strong turbulence regime with 75 mobile nodes at the data rate 150 kbps is 2100 kbps while it is 2300 kbps in the weak turbulence mode at the same rate.

关键词： MANET FSO Turbulence Exponentiated Weibull BER Packet Delivery Ratio NS-3

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SMASHBRAND：小型、灵活、行动迅速、富有创意

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包装与设计 2013年第3期 38-47页

作者： kevin smith Smash Brand

SmashBrand坐落于美国犹他州首府盐湖城，是一家小型设计公司，由几位曾有企业经营与品牌运营经验、有深刻市场洞察力的企业家创立。他们酷爱并专长于消费性产品包装设计，但也会创建精彩的网站以及精心制作主要专注于用户体验的软件应... 详细信息

SmashBrand坐落于美国犹他州首府盐湖城，是一家小型设计公司，由几位曾有企业经营与品牌运营经验、有深刻市场洞察力的企业家创立。他们酷爱并专长于消费性产品包装设计，但也会创建精彩的网站以及精心制作主要专注于用户体验的软件应用程序。

关键词：产品包装设计创意品牌运营企业经营应用程序用户体验盐湖城犹他州

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JVM不适合Erlang

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程序员 2009年第5期 86-87页

作者： kevin smith Hypothetical Labs

kevin smith认为把Erlang移植到JVM是个坏主意。由于TCO递归、GC模型、序列化、闭包等方面的因素,对于一些具有强烈FP特征的语言来说,JVM平台是不明智的选择。

关键词： JVM smith TCO 序列化递归

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连铸结晶器技术的开发--最新全陶瓷镀层结晶器

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钢铁 2004年第Z1期39卷 634-636页

作者： kevin Goode David Jenkinson Brian Stalker Charles Bradley-smith kevin Davis Peter Watson John Wood Bryan Allcock Corus Process Engineering UK Corus Process Engineering UK Corus Process Engineering UK 0utokumpu Stainless Sheffield UK 0utokumpu Stainless Sheffield UK Corus RD & T UK Corus Teesside Cast Products UK Monitor Coatings Limited UK

描述了最新全陶瓷镀层结晶器的跟踪实验,实验涉及到铸坯质量和机器操作性能的改善.铜板窄面磨损是连铸机结晶器使用寿命典型的限制性因素.然而,随着CASTCOAT的开发,陶瓷镀层应用于窄面,这已经不再是严重的问题.相反,增加连铸机结晶器使... 详细信息

描述了最新全陶瓷镀层结晶器的跟踪实验,实验涉及到铸坯质量和机器操作性能的改善.铜板窄面磨损是连铸机结晶器使用寿命典型的限制性因素.然而,随着CASTCOAT的开发,陶瓷镀层应用于窄面,这已经不再是严重的问题.相反,增加连铸机结晶器使用寿命的限制性因素是宽面的磨损.为了增加使用寿命,结晶器宽面铜板显示了一种在铜板底部的磨损形式.这种磨损形式可以在窄面和宽面之间产生小的"角部缝隙".在某些情况下,这种"角部缝隙"允许钢液进入,产生飞边缺陷.在结晶器调宽过程中,如果这种飞边存在,那么就存在着宽面刮伤的可能.此外,一些宽面磨损可以影响出结晶器的铸坯形状,从而影响板坯内部质量.为了减少宽面磨损,Corus Process Engineering已测试了各种镀层和镀层系统,包括全镍镀层,分步镀镍镀层,铬镀层,镍铬镀层.但是由于一些问题,在英国这些镀层并没有被采用.因此,决定开发应用于铜板宽面的陶瓷镀层技术.这一开发需要大量的用于升级连铸机设备的投资.同时也需要为镀层实验付出大量的努力.为确保连续镀层厚度的程序被应用.一副镀陶瓷的宽面铜板被安装在Corus Tesside Lackenby(碳钢)双流连铸机上.第二流在采用普通铜板的情况下运行,以直接比较结果.另一副镀陶瓷的宽面铜板被安装在Outokumpu Stainless(Sheffield)单流连铸机上.在跟踪实验中,铜板发生了非常小的磨损,铸坯形状得到很好的保持.和作为对比的铜板相比,镀陶瓷的宽面铜板使用了更长的时间.与无粘结相联系的其他优点有减少宽面的刮伤、减少粘结漏钢警报、改善铸坯的表面质量.宽面镀陶瓷技术计划成为结晶器各个铜板镀层的通用技术.Arcelor和Nucor也同意并计划开展跟踪实验.Corus Process Engineering也开发了CASTCOATⅡ,这是一项改进的陶瓷镀层技术,它更适合于较高的磨损区域,如双流连铸机中间的分隔装置.

关键词：连铸铜板结晶器镀层宽面镀层结晶器技术

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