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Numerical modelling of a low power non-transferred arc plasma reactor for methane conversion

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Plasma Science and technology 2019年第6期21卷 29-37页

作者： B I MIN D K DINh D h LEE t h kim S ChOI Institute for Nuclear Science and technology Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea University of Science and technology(USt) 217 Gajeong-ro Yuseong-gu Daejeon 34113 Republic of Korea Korea Institute of Machinery and Materials 156 Gajeongbuk-ro Yuseong-gu Daejeon 34103 Republic of Korea Department of Nuclear and Energy Engineering Jeju National University 102 Jejudaehak-ro Jeju 63243Republic of Korea

thermal flow characteristics and the methane conversion reaction in a low power arc plasma reactor for efficient storage and transport of methane,which is the main component of shale gas,were *** temperature and velocity distributions were calculated according to the type of discharge gases and arc current level by a self-developed magnetohydrodynamics (MhD)code and a commercial ANSYS-FLUENt code;the transport of chemical species was analyzed as including the chemical reactions of methane *** simulated results were verified by the comparison of calculated and measured arc voltages with permissible low error as under 4%.three C2 hydrocarbon gases with ethane (C2h6),ethylene (C2h4),and acetylene (C2h2)were selected as the converted species of methane from experimental *** mass fraction of C2 hydrocarbons and hydrogen as the product of the conversion reaction at the reactor was also *** values show good agreement with the actual experimental results in that the major conversion reaction occurred in C2h2 and hydrogen,and the conversions to C2h6,C2h4,and hydrogen were minor reactions of methane pyrolysis conversion.

关键词： numerical modelling non-transferred arc plasma methane chemical reaction

Structure, Electrical Resistivity and Superconductivity of Lowalloyed γ-U Phase Retained to Low temperatures by Means of Rapid Cooling

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Acta Metallurgica Sinica(English Letters) 2016年第4期29卷 388-398页

作者： M.Krupska N.-t.h.kim-Ngan S.Sowa M.Paukov I.tkach D.Drozdenko L.havela Z.tarnawski Institute of Physics Pedagogical University Faculty of Mathematics and Physics Charles University Faculty of Physics and Applied Computer Science AGH University of Science and Technology

the γ-U phase alloys can be retained down to low temperatures with less required alloying concentration by using the splat-cooling technique with a cooling rate better than 10^6 K/s. Doping with 15 at.% Mo, Pt, Pd, Nb leads to a stabilization of the cubic γ-U phase, while it requires much higher Zr concentrations （≥30 at.% Zr）. All U-t splats become superconducting with tc in the range of 0.61-2.11 K. A good agreement of the experimentally observed specific-heat jump at tc with that from BCS theory prediction was obtained for U-15 at.% Mo consisting of the γ-U phase with an ideal bcc A2 structure.

关键词： Crystal structure Electrical resistivity Metallic system Superconductivity

侵袭性乳腺癌:术前MR成像评估瘤周水肿的预后价值

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国际医学放射学杂志 2018年第3期 351-352页

作者： h.heon h.J.kim t.h.kim h.K.Ryeom J.Lee G.C.kim 魏铃 Department of Radiology Kyungpook National University Medical Center

摘要目的评估侵袭性乳腺癌复发病人的术前MR影像瘤周水肿的预后价值。材料与方法纳入2011年1月—2012年12月期间353例接受术前MR成像和乳腺切除术或

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含氟阿利尼特熟料的合成及其水化

国外建材科技 1994年第1期15卷 41-44页

作者： t.h.kim 袁冬萍韩国

本文探讨了含氟阿利尼特熟料在不同温度下的合成及其水化。阿利尼特熟料在1050～1150℃较低温时是稳定的,而在1200℃时,C_(11)S_4CaF_2分解产生C_3S。掺石膏煅烧熟料时,在1150℃时可观察到更多的C_3S。无论其氧化镁的含量多寡,所有的熟... 详细信息

本文探讨了含氟阿利尼特熟料在不同温度下的合成及其水化。阿利尼特熟料在1050～1150℃较低温时是稳定的,而在1200℃时,C_(11)S_4CaF_2分解产生C_3S。掺石膏煅烧熟料时,在1150℃时可观察到更多的C_3S。无论其氧化镁的含量多寡,所有的熟料中均含有C_(11)S_4CaF_2及C_(11)A_7CaF_2。若加入二水及半水石膏,便可以部分地增强阿利尼特熟料的水化反应。

关键词：阿利尼特熟料氟水合合成煅烧

动脉期无明显强化的肝胆期低信号结节是否存在消融或手术后肝细胞癌复发的风险？系统回顾与Meta分析

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国际医学放射学杂志 2020年第3期 369-370页

作者： t.h.kim S.Woo S.han C.h.Suh D.h.Lee J.M.Lee 肖依然 Department of Radiology Seoul National University College of Medicine

摘要目的通过系统回顾和Meta分析确定接受肝切除术或射频消融(RFA)治疗的肝细胞癌(hCC)病人在钆塞酸增强MRI预处理后,无动脉期强化(APhE)的肝胆期(hBP)

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动态对比增强Ct评估经放化疗后病情稳定的晚期非小细胞肺癌病人的代谢反应

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国际医学放射学杂志 2013年第4期 402-403页

作者： S.h. hwang M.R. Yoo C.h. Park t.J. Jeon S.J. kim t.h. kim 苏晓薇 Department of Radiology Gangnam Severance Hospital712 Eonjuro Gangnam -guSeoul 135 -720 Republic of Korea

目的比较经放化疗后病情稳定的非小细胞肺癌(NSCLC)病人于动态对比增强Ct(DCE-Ct)上的肿瘤强化方式与PEt/Ct测得的肿瘤代谢。方法治疗后,根据实性肿瘤疗效评价标准经DCE-Ct证实的病情稳定的病人共65例,应用PEt/Ct评估这些病人的75个NSCL... 详细信息

目的比较经放化疗后病情稳定的非小细胞肺癌(NSCLC)病人于动态对比增强Ct(DCE-Ct)上的肿瘤强化方式与PEt/Ct测得的肿瘤代谢。方法治疗后,根据实性肿瘤疗效评价标准经DCE-Ct证实的病情稳定的病人共65例,应用PEt/Ct评估这些病人的75个NSCLC肿瘤。分别测量注射对比剂后30、60、90、120s和5min后肿瘤的相对强化比率(RER)。根据PEt/Ct最大标准摄取值(SUVmax)将肿瘤的代谢反应分为两类:完全代谢反应(CR)(SUVmaxt判断病情已稳定,DCE-Ct仍可预测残余肿瘤的高代谢状态。要点①DCE-Ct可提供有关非小细胞肺癌的有用的代谢信息。②尽管治疗后NSCLC病灶大体呈稳定状态,但其仍具有不同的代谢状态。③DCE-Ct上肿瘤的强化方式与PEt所示肿瘤的代谢状态有关。④DCE-Ct有助于评估治疗后处于稳定状态的NSCLC的高代谢状态。

关键词：非小细胞肺癌 Ct 18-氟脱氧葡萄糖正电子发射体层摄影术强化方式标准摄取值

使用扩散加权MRI识别隐性前列腺癌病人并进行积极监测

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国际医学放射学杂志 2015年第4期 406-407页

作者： t.h.kim J.Y.Jeong S.W.Lee C.K.kim B.K.Park h.h.Sung 王凤丽 Department of Urology Samsung Medical CenterSungkyunkwan University School of Medicine

摘要目的探讨扩散加权MRI(DW-MRI)中的表观扩散系数(ADC)是否有助于识别积极复查(AS)人群的隐性前列腺癌。方法对前列腺根治性切除性术前行DW-MRI检查的

关键词：前列腺癌 AS ADC 病人扩散加权 MRI

应用基于纹理的Ct局部疾病模式自动化定量评估方法预测特发性肺纤维化病人的生存情况

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国际医学放射学杂志 2018年第3期 366-367页

作者： S.M.Lee J.B.Seo S.Y.Oh t.h.kim J.W.Song S.M.Lee 史洪建 Department of Radiology and Research Institute of Radiology University of Ulsan College of Medicine Asan Medical Center

摘要目的回顾性研究Ct局部疾病模式的基线范围和1年后变化是否能够预测特发性肺纤维化(IPF)病人的生存情况。方法共纳入144例在诊断时和1年后均行Ct扫描的

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Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI h.GhANDVAR E.JUMAEV S.KhAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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