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Orbital-regulated interfacial electronic coupling endows Ni3N with superior catalytic surface for hydrogen evolution reaction

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Science China Chemistry 2020年第11期63卷 1563-1569页

作者： Yanyan Fang Da Sun Shuwen Niu Jinyan Cai Yipeng Zang Yishang Wu Linqin Zhu Yufang Xie Yun Liu Zixuan Zhu amirabbas mosallanezhad Di Niu Zheng Lu Junjie Shi Xiaojing Liu Dewei Rao Gongming Wang Yitai Qian Hefei National Laboratory for Physical Science at the Microscale Department of ChemistryUniversity of Science&Technology of ChinaHefei 230026China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

The interstitial structure and weak Ni-N interaction of Ni3N lead to high unoccupied d orbital energy and unsuitable orbital orientation,which consequently results in weak orbital coupling with H2O and slow water dissociation kinetics for alkaline hydrogen evolution ***,we successfully lower the unoccupied d orbital energy of Ni3N to strengthen the interfacial electronic coupling by employing the strong electron pulling capability of oxygen *** prepared O-Ni3N catalyst delivers an overpotential of 55 mV at 10 mA cm−2,very close to the commercial Pt/*** structural characterization indicates the oxygen incorporation can decrease the electron densities around the Ni ***,density functional theory calculation further proves the oxygen incorporation can create more unoccupied orbitals with lower energy and superior orientation for water adsorption and *** concept of orbital-regulated interfacial electronic coupling could offer a unique approach for the rational design of hydrogen evolution catalysts and beyond.

关键词： hydrogen evolution reaction orbital regulation interfacial electronic coupling Ni3N electrocatalysts

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“普通化学实验”英文课程的构建与实施

化学教育（中英文） 2020年第16期41卷 9-13页

作者：李婉周杰 amirabbas mosallanezhad Jean Felix Mukerabigwi Chad Wilconson 刘济红朱平平中国科学技术大学化学实验教学中心安徽合肥230026 中国科学技术大学化学与材料科学学院安徽合肥230026 University of Wisconsin-Madison Madison WIUSA 53706

面向本校少年班学院大一学生开设了普通化学实验英文课程General Chemistry Laboratory。该课程涉及的知识面宽,突出实验的探究性;自编英文讲义,制作英文课件和教学网站;设计翻转课堂教学;实施多种对外交流模式,从听说读写各方面提高学... 详细信息

面向本校少年班学院大一学生开设了普通化学实验英文课程General Chemistry Laboratory。该课程涉及的知识面宽,突出实验的探究性;自编英文讲义,制作英文课件和教学网站;设计翻转课堂教学;实施多种对外交流模式,从听说读写各方面提高学生的英语水平,使学生的科学创新能力和英语应用能力均得到提高。

关键词：普通化学实验英文课程课程建设

Hydrodynamical wind in magnetized accretion flows with convection

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Research in Astronomy and Astrophysics 2012年第12期12卷 1625-1636页

作者： Shahram Abbassi Amin mosallanezhad School of Physics Damghan UniversityP.O.Box 36715-364DamghanIran School of Astronomy Institute for Research in Fundamental SciencesP.O.Box 19395-5531 TehranIran Center for Excellence in Astronomy&Astrophysics(CEAA-RIAAM) P.O.Box 55134-441 MaraghaIran

The existence of outflow and magnetic fields in the inner region of hot accretion flows has been confirmed by observations and numerical magnetohydrodynamic（MHD）*** present self-similar solutions for radiatively inefficient accretion flows（RIAFs）around black holes in the presence of outflow and a global magnetic *** influence of outflow is taken into account by adopting a radius that depends on mass accretion rateM=M0 （r/r0）s with s〉0. We also consider convection through a mixing length formula to calculate convection parameterα*** we consider the additional magnetic field parameters βr,φ,z=c2 r,φ,z /（2c2 s ）,where c2 r,φ,z are the Alfvén sound speeds in three directions of cylindrical *** numerical results show that by increasing all components of the magnetic field,the surface density and rotational velocity increase,but the sound speed and radial infall velocity of the disk *** have also found that the existence of wind will lead to reduction of surface density as well as rotational ***,the radial velocity,sound speed,advection parameter and the vertical thickness of the disk will increase when outflow becomes important in the RIAF.

关键词： accretion:accretion flow-wind:outflow-convection:MHD

Pullout behavior of polymeric strip in compacted dry granular soil under cyclic tensile load conditions

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第5期10卷 968-976页

作者： Sajad Razzazan Amin Keshavarz Mansour mosallanezhad School of Engineering Persian Gulf University Department of Civil and Environmental Engineering Shiraz University

Assessment of the reinforcement behavior of soil under cyclic and monotonic loads is of great impor- tance in the safe design of mechanically stabilized earth walls, In this article, the method of conducting a multistage pullout （MSP） test on the polymeric strip （PS） is presented, The post-cyclic behavior of the reinforcement can be evaluated using a large-scale pullout apparatus adopting MSP test and one-stage pullout （OSP） test procedures, This research investigates the effects of various factors including load amplitude, load frequency, number of load cycles and vertical effective stress on the peak apparent coefficient of friction mobilized at the soil-PS interface and the pullout resistance of the PS buried in dry sandy soil. The results illustrate that changing the cyclic tensile load frequency from 0,1 Hz to 0,5 Hz does not affect the pullout resistance. Moreover, the influence of increasing the number of load cycles from 30 to 250 on the peak pullout resistance is negligible. Finally, the effect of increasing the cyclic tensile load amplitude from 20% to 40% on the monotonic pullout resistance can be ignored. The peak apparent coefficient of friction mobilized at the soil-PS interface under monotonic and cyclic load conditions decreases with the increase in vertical effective stress.

关键词： Geosynthetics Post-cyclic pullout behavior Interface apparent coefficient of friction Multistage pullout (MSP) test

Structure of ADAFs in a general large-scale B-field:the role of wind and thermal conduction

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Research in Astronomy and Astrophysics 2013年第1期13卷 87-98页

作者： Amin mosallanezhad Mehdi Khajavi Shahram Abbassi Center for Excellence in Astronomy & Astrophysics (CEAA-RIAAM) School of Physics Damghan University Department of Physics School of SciencesFerdowsi University of Mashhad School of Astronomy Institute for Research in Fundamental Sciences

We have explored the structure of a hot flow bathed in a general large-scale magnetic field. The importance of outflow and thermal conduction on the self-similar structure of a hot accretion flow has been investigated. We consider the additional 2 2 2 magnetic parameters are the Alfv6n sound speeds in three directions of cylindrical coordinates. In comparison to the accretion disk without winds, our results show that the radial and rotational velocities of the disk become faster, but the disk becomes cooler because of the angular momentum and energy flux which are taken away by the winds. Moreover, thermal conduction opposes the effect of winds and not only decreases the rotational velocity but also in- creases the radial velocity as well as the sound speed of the disk. In addition, we study the effect of the global magnetic field on the structure of the disk. Our numerical re- suits show that all the components of a magnetic field can be important and they have a considerable effect on velocities and vertical structure of the disk.

关键词： accretion: accretion flow -- wind: outflow -- thermal conduction

Finite Element Model Updating for Structural Health Monitoring

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Structural Durability & Health Monitoring 2020年第1期14卷 1-17页

作者： amirabbas Haidarpour Kong Fah Tee School of Engineering University of GreenwichChatham MaritimeKentME44TBUK

This paper provides a model updating approach to detect,locate,and char-acterize damage in structural and mechanical systems by examining changes in mea-sured vibration *** in vibration-based damage identification has been rapidly expanding over the last few *** basic idea behind this technology is that modal parameters(notably frequencies,mode shapes,and modal damping)are functions of the physical properties of the structure(mass,damping,and sifies).Therefore,changes in the physical properties will cause changes in the modal proper-ties which could be obtained by structural health monitoring(SHM).Updating is a process fraught with numerical *** arise from inaccuracy in the model and imprecision and lack of information in the measurements,mainly taken place in joints and critical *** motivation for the development of this technology ***,methods are categorized according to various criteria such as the level of damage detection provided from vibration testing,natural frequency and mode shape readings are then obtained by using modal analysis techniques,which are used for updating structural parameters of the associated finite element model The experi-mental studies for the laboratory tested bridge model show that the proposed *** using ME scope technique can provide reasonable model updating results.

关键词： Structural health monitoring model updating natural frequency mode shape stiffness vibration testing

Wildfire events at the Triassic-Jurassic boundary of the Tabas Basin,Central Iran

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International Journal of Coal Science & Technology 2021年第5期8卷 897-907页

作者： Majid Alipour Bahram Alizadeh amirabbas Jahangard AhmadReza GandomiSani Department of Petroleum Geology and Sedimentary Basins Faculty of Earth SciencesShahid Chamran University of AhvazAhvazIran Exploration Directorate(ED) National Iranian Oil CompanyTehranIran

This paper presents organic geochemical evidence pointing to the occurrence of wildfire events at the Triassic-Jurassic boundary in Central *** studied outcrop section(the Kamarmacheh Kuh section)is comprised of the Upper Triassic Nayband Formation which passes conformably into the Lower Jurassic Ab-e-Haji Formation with no sharp *** petrographical studies reveal a higher concentration of semi-fusinite macerals and microscopic charcoal at the boundary between studied *** observation can be an evidence for widespread wildfire events at the Triassic-Jurassic boundary of the studied *** these fires,vast areas of land were exposed for erosion and large volumes of clastic sediments were provided due to increased *** agrees well with previous sedimentological and stratigraphical studies suggesting a major change in the depositional conditions from marine to non-marine at the Triassic-Jurassic boundary of the Tabas *** findings can have important implications about paleo-depositional settings of the studied formations and the nature of the associated organic matter.

关键词： Wildfire events Triassic-Jurassic boundary Nayband and Ab-e-Haji formations Tabas Basin Central Iran

Simulation of space charge transport in solid dielectric materials using transmission lines modeling method

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Journal of Advanced Dielectrics 2019年第6期9卷 63-80页

作者： Amin Shamsi Alireza Ganjovi amirabbas Shayegani Akmal School of Electrical and Computer Engineering University of Tehran TehranIran Laser Research Department Photonics Research Institute Institute of Science and High Technology and Environmental Sciences Graduate University of Advanced TechnologyKermanIran

In this paper,a lumped RC circuit model,which is based on the Transmission Line Modeling(TLM)method,is used to describe the space charge production and displacement mechanisms in three different solid dielectric materials(LDPE,PTFE and FR4).Each dielectric material is considered as a transmission line with the capacitive and resistance *** obtained circuit equations are solved along with the continuity equations for the various charged species in the bulk of solid dielectric *** electric potential and field,density of different charged species and their recombination rates,resistive and capacitive properties of the solid dielectric material are *** addition,the effects of the variations in the applied voltage,dielectric permittivity and temperature on these physical parameters are ***,compared with LDPE and PTFE,the net charge density increment rate in FR4 is much ***,the influences of temperature on the net charge density in LDPE are not ***,at the higher applied voltages,the current density is ***,the effects of temperature variations on the recombination rates,net charge and current density in LDPE are much ***,the suitability of LDPE as solid dielectric material is proved.

关键词： Solid dielectric materials high voltage devices space charges TLM method

微量元素叶面喷施对水稻(Oryza sativa L.)产量及其构成因素的影响

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植物营养与肥料学报 2021年第5期27卷 909-918页

作者： Ashkan Daneshtalab Lahijani amirabbas Mosavi Morteza Moballeghi Department of Agronomy Islamic Azad University of ChalousChalousMazandaran46615/397Iran

【目的】基于微量元素在水稻营养和代谢中的重要作用,研究叶面喷施(Fe EDTA 0.1%,Zn EDTA 0.05%,B 0.02%,Cu EDTA 0.05%,and Mn EDTA 0.05%)对水稻品种Shiroodi产量的影响,明确叶面喷施微量元素的最佳次数和时期。【方法】为了准确评估... 详细信息

【目的】基于微量元素在水稻营养和代谢中的重要作用,研究叶面喷施(Fe EDTA 0.1%,Zn EDTA 0.05%,B 0.02%,Cu EDTA 0.05%,and Mn EDTA 0.05%)对水稻品种Shiroodi产量的影响,明确叶面喷施微量元素的最佳次数和时期。【方法】为了准确评估液体肥料(Fe-EDTA 0.1%,Zn-EDTA 0.05%,B 0.02%,Cu-EDTA 0.05%,and Mn-EDTA 0.05%)对水稻品种Shiroodi产量的影响,和喷施微量元素肥料1~7次(T1~T7),第一次喷施在移栽后9天进行,之后每隔7天喷施一次。【结果】喷施微量元素显著增加了植株干重、籽粒产量、千粒重和收获指数,而且试验年份与喷施微量元素处理对籽粒含锌量、叶片叶绿素b含量和千粒重有显著交互作用。T4处理籽粒产量为4257 kg/hm^(2),而T0只有3499 kg/hm^(2),增产幅度约为20%。产量和产量构成因子的提高源于喷施微量元素肥料处理增加了每株分蘖数、穗长和穗粒数。【结论】叶面喷施有效地提高了水稻对微量元素的吸收利用,喷施4次效果最好。

关键词：水稻叶面喷施微量元素叶绿素籽粒产量