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Preparation of bunched CeO_(2) and study on microwave absorbing properties with MWCNTs binary composite

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Particuology 2023年第2期73卷 95-102页

作者： yingjie guo Xiangrui Song Sihang Ma Yinghe Qi Xiaotao Yuan Huili Fan School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing100083China

A novel bunched cerium oxide(CeO_(2))was prepared and its binary composite material with multi-walled carbon nanotubes presented an excellent microwave absorbing *** morphology,structure,and absorbing properties of the composite material were *** was found that the minimum reflection loss(RL)of the composite material at 15.79 GHz was−45.7 dB when the thickness was 5.5 *** was worth noting that when the composite material was in the thickness range of 5.0-7.5 mm and the frequency was 11.36-17.77 GHz,the electromagnetic wave RL was<−30 dB,which illustrated that the composite material had a good absorbing effect over a wide thickness *** results of the study contributed to the design and preparation of efficient microwave absorbing materials(MAM)with rare earth oxide composites and their applications,which demonstrated the importance of new composites with special structures in the field of MAM.

关键词： Bunched cerium oxide Microwave absorbing material Multi-walled carbon nanotubes

Compaction Performance of Biomimetic Press Roller to Soil

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Journal of Bionic Engineering 2015年第1期12卷 152-159页

作者： Jin Tong Qingzhu Zhang Li guo Yuan Chang yingjie guo Fengwu Zhu Donghui Chen Xin Liu The Key Laboratory of Bionic Engineering (Ministry of Education of China) Jilin University Changchun 130025 China The College of Biological and Agricultural Engineering Jilin University Changchun 130025 China. The School of Engineering Huzhou University Huzhou 313000 China The College of Engineering Technique Jilin Agriculture University Changchun 130118 China

The compaction characteristics of biomimetic press roller with ridge structures, inspired from the geometrical features of the ventral surface of dung beetle （Copris ochus Motschulsky）, were investigated in this work. Field tests were carried out at three weights （300 N, 500 N and 700 N） and two forward velocities （0.64 m·s^-1 and 1.04 m·s^-1） for biomimetic press roller and conventional press roller. To determine compaction performance, rolling resistance, soil bulk density, soil moisture content, emergence rate and percent change of plant spacing were measured. Roller weight was proved to be the major contributory factor on soil compaction. Biomimetic press roller decreased rolling resistance by 2.98% -17.69% at the velocity of 0.64 m·s^-1, and by 6.59% -18.57% at the velocity of 1.04 m·s^-1 compared with the conventional press roller. Both biomimetic roller and conventional roller can achieve proper bulk density for corn seeds under the experimental conditions. However, compared with the conventional roller, biomimetic roller helped soil conserve more moisture. The highest emergence rate was found when the biomimetic roller worked with a weight of 700 N and velocity of 0.64 m·s^-1. Percent change of plant spacing was lower using the biomimetic press roller compared with that using the conventional roller, because that adjacent ridge structures of the biomi- metic roller can well constrain the flow of soil during compacting process.

关键词： press roller soil compaction biomimetics geometrical structure compaction performance

Bi-functional selection markers assist segregation of transgene-free,genome-edited mutants

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Science China(Life Sciences) 2021年第9期64卷 1567-1570页

作者： Zhen Liang Yuqing Wu yingjie guo Yanxiu Liu Lingling Ma Yincen Wu School of Life Science Shanxi UniversityTaiyuan 030006China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610000China

Dear Editor,In recent years,CRISPR/Cas9-mediated genome editing has been successfully applied in various plants for functional analysis or crop improvement(Chen et al.,2019).We previously reported DNA-free genome-edit... 详细信息

关键词： CRISPR/Cas9 genome functional

An empirical model of the global distribution of plasmaspheric hiss based on Van Allen Probes EMFISIS measurements

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Earth and Planetary Physics 2020年第3期4卷 246-265页

作者： JingZhi Wang Qi Zhu XuDong Gu Song Fu JianGuang guo XiaoXin Zhang Juan Yi yingjie guo BinBin Ni Zheng Xiang Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430079China Key Laboratory of Space Weather National Center for Space WeatherChina Meteorological AdministrationBeijing 100081China

Using wave measurements from the EMFISIS instrument onboard Van Allen Probes,we investigate statistically the spatial distributions of the intensity of plasmaspheric hiss *** reproduce these empirical results,we establish a fitting model that is a thirdorder polynomial function of L-shell,magnetic local time(MLT),magnetic latitude(MLAT),and AE*.Quantitative comparisons indicate that the model’s fitting functions can reflect favorably the major empirical features of the global distribution of hiss wave intensity,including substorm dependence and the MLT *** results therefore provide a useful analytic model that can be readily employed in future simulations of global radiation belt electron dynamics under the impact of plasmaspheric hiss waves in geospace.

关键词： hiss Van Allen Probes global model

On the loss mechanisms of radiation belt electron dropouts during the 12 September 2014 geomagnetic storm

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Earth and Planetary Physics 2020年第6期4卷 598-610页

作者： Xin Ma Zheng Xiang BinBin Ni Song Fu Xing Cao Man Hua DeYu guo yingjie guo XuDong Gu ZeYuan Liu Qi Zhu Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Chinese Academy of Sciences Center for Excellence in Comparative Planetology Hefei 230026China

Radiation belt electron dropouts indicate electron flux decay to the background level during geomagnetic storms,which is commonly attributed to the effects of wave-induced pitch angle scattering and magnetopause *** investigate the loss mechanisms of radiation belt electron dropouts triggered by a solar wind dynamic pressure pulse event on 12 September 2014,we comprehensively analyzed the particle and wave measurements from Van Allen *** dropout event was divided into three periods:before the storm,the initial phase of the storm,and the main phase of the *** electron pitch angle distributions(PADs)and electron flux dropouts during the initial and main phases of this storm were investigated,and the evolution of the radial profile of electron phase space density(PSD)and the(μ,K)dependence of electron PSD dropouts(whereμ,K,and L^*are the three adiabatic invariants)were *** energy-independent decay of electrons at L>4.5 was accompanied by butterfly PADs,suggesting that the magnetopause shadowing process may be the major loss mechanism during the initial phase of the storm at L>*** features of electron dropouts and 90°-peaked PADs were observed only for>1 MeV electrons at L<4,indicating that the wave-induced scattering effect may dominate the electron loss processes at the lower L-shell during the main phase of the *** of the(μ,K)dependence of electron PSD drops and calculations of the minimum electron resonant energies of H+-band electromagnetic ion cyclotron(EMIC)waves support the scenario that the observed PSD drop peaks around L^*=3.9 may be caused mainly by the scattering of EMIC waves,whereas the drop peaks around L^*=4.6 may result from a combination of EMIC wave scattering and outward radial diffusion.

关键词： radiation belt electron flux dropouts geomagnetic storm electron phase space density magnetopause shadowing wave-particle interactions

Impact of molecular weight on the mechanism of cellular uptake of polyethylene glycols(PEGs) with particular reference to P-glycoprotein

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Acta Pharmaceutica Sinica B 2020年第10期10卷 2002-2009页

作者： Tingting Wang yingjie guo Yang He Tianming Ren Lei Yin John Paul Fawcett Jingkai Gu Huimin Sun Clinical Laboratory First HospitalJilin UniversityChangchun 130061China Research Institute of Translational Medicine First HospitalJilin UniversityChangchun 130061China Research Center for Drug Metabolism College of Life ScienceJilin UniversityChangchun 130012China Department of Pharmaceutical Sciences and Experimental Therapeutics College of PharmacyUniversity of IowaIowa City IA 52242USA Beijing Institute of Drug Metabolism Beijing 102209China National Institutes for Food and Drug Control Beijing 100050China

Polyethylene glycols(PEGs)in general use are polydisperse molecules with molecular weight(MW)distributed around an average value applied in their designation e.g.,PEG *** research has shown that PEGs can act as P-glycoprotein(P-gp)inhibitors with the potential to affect the absorption and efflux of concomitantly administered ***,questions related to the mechanism of cellular uptake of PEGs and the exact role played by P-gp has not been *** this study,we examined the mechanism of uptake of PEGs by MDCK-mock cells,in particular,the effect of MW and interaction with P-gp by MDCK-hMDRl and A549 *** results show that:(a)the uptake of PEGs by MDCK-hMDR1 cells is enhanced by P-gp inhibitors;(b)PEGs stimulate P-gp ATPase activity but to a much lesser extent than verapamil;and(c)uptake of PEGs of low MW(5000 Da)occurs by a combination of passive diffusion and caveolae-mediated *** findings suggest that PEGs can engage in P-gp-based drug interactions which we believe should be taken into account when using PEGs as excipients and in PEGylated drugs and drug delivery systems.

关键词： P-gp PEGs P-gp-substrate Passive diffusion Endocytosis

A UNIFIED APPROACH FOR DEALING WITH THE EM SCATTERING FROM SYMMETRIC AND ANTI-SYMMETRIC STRUCTURES

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Journal of Electronics(China) 1990年第4期7卷 377-381页

作者：郭英杰 Xidian University Xi'an

It is of both the theoretical and practical importance to reduce the storage andCPU time of moment methods by utilizing the geometrical and physical features of the *** unified approach based on the group theory is pr... 详细信息

关键词： EM scattering symmetric and anti-symmetric structures generalized image method group theory integral equations method

Study on the practice of using WeChat public account to promote sports nutrition knowledge ——Take Shenyang Sport University's students as an example

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Study on the practice of using WeChat public account to prom...

中国营养学会第十五届全国营养科学大会

作者： Chao Zhang yingjie guo 沈阳体育学院

To use WeChat public account to promote sports nutrition knowledge among Shenyang sports college students, and to explore an effective way to provide professional sports nutrition knowledge for college students. Methods By using the method of literature review, the content is mainly related to the research results of college students demand and cognition of sports nutrition knowledge, which lays a foundation for the determination of the research content and the adoption of various indicators. Created the official account of Wechat and WeChat Mini Programs s "camp recognition and solution athlete". At the same time, in the way of personal Wechat and Weibo, it was promoted among the students of Shenyang Institute of physical Education, and the practical research on using Wechat official account to promote sports nutrition knowledge was carried out. This Wechat public platform regularly publishes high-quality push content at the frequency of 2-3 articles a week to provide fitness groups with better scientific exercise diet advice and reasonable scientific exercise nutrition knowledge. In order to understand the knowledge needs of college students, improve the content of Wechat official account and test the promotion results, this study conducted three questionnaires with questionnaire stars, mainly for the college students of Shenyang Institute of physical Education. On October 17, 2019, the first questionnaire was distributed, a total of 216 questionnaires were sent out, and 216 questionnaires were collected, with an effective rate of 100%. A total of nine multiple choice questions were designed in the questionnaire, which were asked from the aspects of personal information, exercise, nutrition and diet. The second questionnaire survey was released on December 19, 2019, a total of 258 people participated, and the effective rate of the questionnaire was 100%. The content of the survey was a survey of knowledge and information about weight loss, which made adequate pre

关键词： sports nutrition knowledge WeChat official account Practice College students

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《诗章》对《神曲》的互文式书写

外国文学研究 2023年第5期45卷 73-85页

作者：郭英杰陕西师范大学外国语学院

《诗章》与《神曲》的关系问题一直是学界争论的焦点。当“现代性”与“经典重读”介入诗歌文本阐释,二者错综复杂的联系就被重新审视。《诗章》受到《神曲》的影响,这已得到学界的充分肯定。但是,具体影响表现在什么地方?国内外学者虽... 详细信息

《诗章》与《神曲》的关系问题一直是学界争论的焦点。当“现代性”与“经典重读”介入诗歌文本阐释,二者错综复杂的联系就被重新审视。《诗章》受到《神曲》的影响,这已得到学界的充分肯定。但是,具体影响表现在什么地方?国内外学者虽有涉及,可是比较深入细致的研究成果并不多见。文章从文本互文的角度对《诗章》与《神曲》的关系问题进行探讨,认为《诗章》在艺术呈现的方式方面存在对《神曲》的互文式书写,反映在宗教隐喻之维、自由美学之维、生命哲学之维等方面。它们在无形之中彰显了庞德“新/日日新”的创作思想及理念。

关键词：《诗章》《神曲》互文式书写