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Asymptotic analysis of dispersive tsunami from a slender fault

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Journal of Hydrodynamics 2019年第6期31卷 1073-1084页

作者： yile li Chiang C.Mei I-Chi Chan Katy TexasUSA Department of Civil and Environmental Engineering Massachusetts Institute of TechnologyCambridgeMAUSA Department of Civil Engineering National Taiwan UniversityTaipeiChina

An approximate theory is developed for the two-dimensional propagation of tsunami emanated from a slender fault of fine *** significant contrasts between the sea depth,fault width,fault length and the bathymetric length scales,we invoke parabolic approximation to deduce a linear Kademtsev・Petviashivili(K-P)equation governing the two-dimensional propagation of dispersive long waves over great *** techniques are employed to explore the far-field radiation in the forward and spanwise directions in a sea of constant *** solution can be used as a convenient input for predicting local variations of wave scattering and possibly breaking along a coast.

关键词： Slender fault dispersion in transocean tsunami linear Kademtsev-Petviashivi1i approximation

Effect of cobalt oxide on performance of Pd catalysts for lean-burn natural gas vehicles in the presence and absence of water vapor

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Journal of Natural Gas Chemistry 2010年第2期19卷 134-138页

作者： Enyan Long Xiaoyu Zhang yile li Zhimin liu Yun Wang Maochu Gong Yaoqiang Chen Key Laboratory of Green Chemistry ＆ Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 Sichuan China

Pd-based catalysts modified by cobalt were prepared by co-impregnation and sequential impregnation methods,and characterized by X-ray powder diffraction （XRD）,N2 adsorption/desorption （Brunauer-Emmet-Teller method）,CO-chemisorption and X-ray photoelectron spectroscopy （XPS）.The activity of Pd catalysts was tested in the simulated exhaust gas from lean-burn natural gas *** effect of Co on the performance of water poisoning resistance for Pd catalysts was estimated in the simulated exhaust gas with and without the presence of water *** was found that the effect of Co significantly depended on the preparation ***/La-Al2O3 catalyst prepared by co-impregnation exhibited better water-resistant *** results of XPS indicated that both CoAl2O4 and Co3O4 were present in the Pd catalysts modified by *** the catalyst prepared by sequential impregnation method,the ratio of CoAl2O4/Co3O4 was higher than that of the catalyst prepared by co-impregnation *** could be concluded that Co3O4 played an important role in improving water-resistant performance.

关键词： Co Pd-only catalyst lean-burn natural gas vehicles methane oxidation water vapor

CeO_2-ZrO_2-La_2O_3-Al_2O_3 composite oxide and its supported palladium catalyst for the treatment of exhaust of natural gas engined vehicles

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Journal of Natural Gas Chemistry 2009年第2期18卷 139-144页

作者： Xiaoyu Zhang Enyan,Long yile li Jiaxiu Guo lijuan Zhang Maochu Gong Minghua Wang Yaoqiang Chen Key Laboratory of Green Chemistry ＆ Technology of the Ministry of Education College of Chemistry Sichuan University Chengdu 610064 Sichuan China College of Architecture and Environment Sichuan University Chengdu 610064 Sichuan China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China Sichuan Tianyi Science ＆ Technology Co. Ltd. Chengdu 610225 Sichuan China

Composite supports CeO2-ZrO2-Al2O3（CZA） and CeO2-ZrO2-Al2O3-La2O3（CZALa） were prepared by co-precipitation method. Palladium catalysts were prepared by impregnation and their purification ability for CH4, CO and NOx in the mixture gas simulated the exhaust from natural gas vehicles （NGVs） operated under stoichiometric condition was investigated. The effect of La2O3 on the physicochemical properties of supports and catalysts was characterized by various techniques. The characterizations with X-ray diffraction （XRD） and Raman spectroscopy revealed that the doping of La2O3 restrained effectively the sintering of crystallite particles, maintained the crystallite particles in nanoscale and stabilized the crystal phase after calcination at 1000 ℃. The results of N2-adsorption, H2-temperatnre-programmed reduction （H2-TPR） and oxygen storage capacity （OSC） measurements indicated that La2O3 improved the textural properties, reducibility and OSC of composite supports. Activity testing results showed that the catalysts exhibit excellent activities for the simultaneous removal of methane, CO and NOx in the simulated exhaust gas. The catalysts supported on CZALa showed remarkable thermal stability and catalytic activity for the three pollutants, especially for NOx. The prepared palladium catalysts have high ability to remove NOx, CH4 and CO, and they can be used as excellent catalysts for the purification of exhaust from NGVs operated under stoichiometric condition. The catalysts reported in this work also have significant potential in industrial application because of their high performance and low cost.

关键词： Pd catalysts natural gas vehicles exhaust methane oxidation NOx conversion CeO2-ZrO2-Al2O3 La2O3

Extraordinary thermal conductivity of polyvinyl alcohol composite by aligning densified carbon fiber via magnetic field

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Nano Research 2023年第2期16卷 2572-2578页

作者： Xiaoxiao Guo Shujian Cheng Bo Yan yile li Yinghui Zhou Weiwei Cai Yufeng Zhang Xue-ao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China Jiujiang research institute of Xiamen University Jiujiang 360404China

Thermal interface materials(TIMs)with high through-plane thermal conductivity are urgently desired to avoid overheating of high-power density *** and aligning fillers in polymer matrixes via magnetic field is a promising method to improve the thermal conductivity of the ***,either the fillers need to be modified with magnetic particles or a strong magnetic field is needed for good alignment in high filler *** prevents further improvement of the through-plane thermal ***,mesophase pitch-based carbon fibers(MPCFs)with a content as high as 76 wt.%are aligned vertically in water-soluble polyvinyl alcohol(PVA)under a low magnetic field(~0.4 T),forming a vertically aligned MPCF(VAMPCF)/PVA composite with an extraordinary through-plane thermal conductivity of 86 W/(m·K),which is higher than that of many *** addition,both theoretical and experimental results demonstrate that the critical intensity of the magnetic field needed for good alignment of the fillers depends on their size and magnetic ***,the water solubility of PVA makes it easy to recycle *** study offers an inspired venue to develop excellent and eco-friendly TIMs to meet ever increasing demand in heat dissipation for electronics.

关键词： polyvinyl alcohol carbon fiber thermal conductivity Landau diamagnetism magnetic field

Influence of CeO_2 and La_2O_3 on properties of palladium catalysts used for emission control of natural gas vehicles

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Journal of Natural Gas Chemistry 2009年第4期18卷 415-420页

作者： yile li Xiaoyu Zhang Enyan Long Hongmei li Dongdong Wu li Cai Maochu Gong Yaoqiang Chen Key Laboratory of Green Chemistry ＆ Technology of the Ministry of Education College of Chemistry Sichuan University Chengdu 610064 Sichuan China

Pd/YZ-Al2O3 （Y and Zr modified Al2O3, and hereafter, labelled as A1） catalysts with 4 wt% additive CeO2 and/or La2O3 were prepared and characterized by X-ray photoelectron spectroscopy （XPS）, NO-temperature programmed desorption （NO-TPD）, Nz-adsorption/desorption （Branauer-Emmet-Teller BET method）, X-ray diffraction （XRD） and CO-chemisorption. Catalytic activities for CH4, CO and NO conversion were tested in a gas mixture simulated the emissions from natural gas vehicles （NGVs） operated under stoichiometric conditions. The results indicated that all catalysts exhibited excellent catalytic performances for CH4 and CO oxidation and the promoting effect of CeO2 or La2O3 was significant for NO conversion. XPS results showed that the electron density around Pd was increased by CeO2 and/or La2O3, the binding energy of Pd 3d decreased as the order： Pd/Al 〉 Pd/Ce/Al 〉 Pd/La/Al 〉 Pd/CeLa/Al. The electron-rich Pd showed Rh-like catalytic properties which exhibited good activity for the reduction of NO. NO-TPD results showed that the addition of CeO2 and/or La2O3 increased NO adsorption on surface, and promoted the conversion of NO.

关键词： NGVs under stoichiometric condition palladium catalyst XPS NO-TPD NO conversion methane conversion

Determination of Thermal Physical Properties

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China's Refractories 2018年第2期27卷 13-17页

作者： ZHANG Yajing li yile TAN lihua National Quality Inspection and Supervision Center for Refractories Sinosteel Luoyang Institute of Refractories Research Co.Ltd.Luoyang 471039China Tenmat Advanced Materials Manchester M17 1TDUnited Kingdom Sinosteel Luoyang Institute of Refractories Research Co. Ltd.Luoyang 471039China

In this paper, the parallel wire techniques for determining thermal physical properties inchtding thermal conductivity, thermal diffusivity and specfic heat capacity were proposed. The theoretical basis, the apparatus and procedure, the technical data for not only normal refractory but also carbon-containing materials were also introduced.

关键词： thermal conductivity thermal diffusivity specific heat capacity

脑缺血再灌注损伤中内质网应激-自噬的作用及中药调控机制

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中国组织工程研究 2025年第20期29卷 4325-4332页

作者：张硕崔应麟周盼盼李毅乐王蕾邹倩倩河南中医药大学第二临床医学院河南省郑州市450002 河南省中医院名医堂河南省郑州市450002

背景:研究表明内质网应激引起的缺血半暗带区神经细胞自噬是脑缺血再灌注损伤的关键环节,内质网跨膜蛋白PERK、IRE1α、ATF6与GRP78/BIP解离激活后介导的细胞自噬对神经元的转归起着重要作用。而中药可通过调控内质网应激-自噬,减少神... 详细信息

背景:研究表明内质网应激引起的缺血半暗带区神经细胞自噬是脑缺血再灌注损伤的关键环节,内质网跨膜蛋白PERK、IRE1α、ATF6与GRP78/BIP解离激活后介导的细胞自噬对神经元的转归起着重要作用。而中药可通过调控内质网应激-自噬,减少神经元损伤或死亡,发挥脑保护作用。目的:探讨内质网应激-自噬在脑缺血再灌注损伤中的作用及中药调控机制研究进展。方法:以“脑缺血再灌注损伤,脑损伤,缺血性中风,内质网应激、自噬,中药,复方,信号通路,皂苷,多酚,生物碱”为中文检索词,以“cerebral ischemia-reperfusion injury,ischemic stroke,brain injury,endoplasmic reticulum stress,autophagy,traditional Chinese medicine,compounds,signaling pathways,saponins,polyphenols,alkaloids”为英文检索词,检索2015年1月至2024年5月中国知网以及PubMed数据库中有关内质网应激、自噬与脑缺血再灌注损伤及中药调控机制的文献,排除与研究内容不相符、过时及重复的文献。共检索出1197篇相关文献,最终纳入71篇文献进行综述分析。结果与结论:①大量研究结果表明,内质网应激-自噬与脑缺血再灌注损伤密切相关;②中药单体有效成分及复方可通过调控PERK-eIF2α-ATF4、IRE1α-ASK1-JNK、IRE1α-XBP等信号通路调节内质网应激-自噬相关蛋白表达,减轻神经细胞损伤,发挥脑保护作用。

关键词：内质网应激自噬脑缺血再灌注损伤内质网跨膜蛋白中药信号通路工程化组织构建

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建设现代化经济体系的政治经济学逻辑

财经科学 2020年第10期 53-64页

作者：李怡乐西南财经大学经济学院

参照《资本论》分析资本运动及扩大再生产的文本结构,建设现代化经济体系是从生产、流通、分配、再生产等层次推动社会主义市场经济条件下技术创新、空间平衡和制度优化三方面的有机互动。就生产过程而言,现代产业体系和绿色发展体系协... 详细信息

参照《资本论》分析资本运动及扩大再生产的文本结构,建设现代化经济体系是从生产、流通、分配、再生产等层次推动社会主义市场经济条件下技术创新、空间平衡和制度优化三方面的有机互动。就生产过程而言,现代产业体系和绿色发展体系协力打造了生产组织创新和产品创新的技术条件;城乡区域发展体系和全面开放体系为流通过程提供平衡增长和扩大再生产的空间条件;现代市场体系、收入分配体系和社会主义市场经济体制作为现代化经济体系的制度条件,合力推动技术创新的发生与扩散,并以有效的宏观治理体系协调社会总资本再生产的内在矛盾,推动社会主义生产力发展和生产关系稳固的协同。

关键词：现代化经济体系技术空间制度

一场超越资本主义生产方式的革命?——评杰里米·里夫金的《零边际成本社会》

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政治经济学评论 2015年第3期6卷 197-213页

作者：李怡乐西南财经大学经济学院

《零边际成本社会》一书阐述了第三次工业革命的通信/能源矩阵如何支持开放、协同、横向规模化的物联网体系运营,以此为基础,人类社会具有了超越资本主义生产方式的技术可能性。从马克思主义经济学的视角出发,本文着重考察了里夫金对生... 详细信息

《零边际成本社会》一书阐述了第三次工业革命的通信/能源矩阵如何支持开放、协同、横向规模化的物联网体系运营,以此为基础,人类社会具有了超越资本主义生产方式的技术可能性。从马克思主义经济学的视角出发,本文着重考察了里夫金对生产方式演变的研究是否是历史唯物主义的;物联网控制权竞争体现出的公众反新自由主义过度商品化斗争的性质;物联网时代的合作制经营能否实现经济民主,最终完成对资本逻辑的超越。本文认为,尽管里夫金分析了合作共赢的新经济时代所需的配套制度变革,以及当前协同主义运动与资本主义的激烈对抗,但忽略了这场生产方式革命背后工人阶级斗争的历史作用,从而使物联网技术最终能否摆脱资本主义应用模式具有高度不确定性。

关键词：通信/能源矩阵物联网资本主义协同主义合作制