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| 1 | CFD-DEM simulation of spouting of corn-shaped particles显示文摘Three dimensionally coupled computational fluid dynamics (CFD) and discrete element method (DEM) were used to investigate the flow of corn-shaped particles in a cylindrical spouted bed with a conical base. The particle motion was modeled by the DEM, and the gas motion by the k-ε two-equation turbulent model. A two-way coupling numerical iterative scheme was used to incorporate the effects of gas-particle interactions in terms of momentum exchange. The corn-shaped particles were constructed by a multisphere method. Drag force, contact force, Saffman lift force, Magnus lift force, and gravitational force acting on each individual particle were considered in establishing the mathematical modeling. Calculations were carried out in a cylindrical spouted bed with an inside diameter of 200 mm, a height of 700 mm, and a conical base of 60 . Comparison of simulations with experiments showed the availability of the multi-sphere method in simulating spouting action with corn-shaped particles, but it depended strongly on the number and the arrangement of the spherical elements. Gas-solid flow patterns, pressure drop, particle velocity and particle concentration at various spouting gas velocity were discussed. The results showed that particle velocity reaches a maximum at the axis and then decreases gradually along the radial direction in the whole bed. Particle concentration increases along the radial direction in the spout region but decreases in the fountain region, while it is nearly constant in the annulus region. Increasing spouting gas velocity leads to larger pressure drop, remarkably increased speed of particle moving upward or downward, but decreased particle concentration. | Bing Ren Wenqi Zhong Yu Chen Xi Chen Baosheng Jin Zhulin Yuan Yong Lu | 2012 | Particuology2012，10，5： | 17 |
| 2 | Research progress of nanoparticles as enzyme mimetics显示文摘Natural enzymes as biological catalysts possess remarkable advantages,especially their highly efficient and selective catalysis under mild conditions.However,most natural enzymes are proteins,thus exhibiting an inherent low durability to harsh reaction conditions.Artificial enzyme mimetics have been pursued extensively to avoid this drawback.Quite recently,some inorganic nanoparticles(NPs) have been found to exhibit unique enzyme mimetics.In addition,their much higher stability overcomes the inherent disadvantage of natural enzymes.Furthermore,easy mass-production and low cost endow them more benefits.As a new member of artificial enzyme mimetics,they have received intense attention.In this review article,major progress in this field is summarized and future perspectives are highlighted. | HU XiaoNa LIU JianBo HOU Shuai WEN Tao LIU WenQi ZHANG Ke HE WeiWei JI YingLu REN HongXuan WANG Qi WU XiaoChun | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，10： | 4 |
| 3 | The Tribochemical Study of Some N-Containing Heterocyclic Compounds as Lubricating Oil Additives显示文摘 | Zhongyi He Wenqi Rao Tianhui Ren Weimin Liu Qunji Xue | 2002 | Tribology Letters2002，，2： | 1 |
| 4 | The tribochemical study of some N-containing heterocyclic compounds as lubricating oil additives 显示文摘 | Zhongyi He Wenqi Rao Tianhui Ren | 2002 | Tribology Letters2002，13，2： | 1 |
| 5 | Study on the hydrogenation coupling of methane显示文摘 | Bin Dai Xiuling Zhang Lin Zhang Weimin Gong Ren He Wenqi Lu Xinlu Deng | 2001 | Science in China Series B: Chemistry2001，，2： | 1 |
| 6 | The tribochemical study of some N2 containing heterocyclic compounds as lubricating oil additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，13，： | 1 |
| 7 | The Tribochemical Study of Some N2Containing Heteroeyclic Compounds as Imbricating Oil Additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，13，： | 1 |
| 8 | The Tribochemical Study of Some N-Containing Heterocyclic Compounds as Lubricating Oil Additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui etal | 2002 | Tribology Letters2002，13，： | 1 |
| 9 | The Tribochemical Study of Some N-containing Heterocyclic Compounds as Lubricating Oil Additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，，13： | 1 |
| 10 | The tribochemical study of some N2 containing heterocyclic compounds as lubricating oil additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，13，： | 1 |
| 11 | In-vestigation of mixing behaviors in a spouted bed withdifferent density particles using discrete element meth-od 显示文摘 | Ren Bing Shao Yingjuan Zhong Wenqi | 2012 | Powder Technology2012，222，： | 1 |
| 12 | The tribochemical study of some N-containing heterocyclic compounds as lubricating oil additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，13，2： | 1 |
| 13 | The triho- chemical study of some N-containing heterocyclic compounds as lubricating oil additives显示文摘 | He Zhongyi Rao Wenqi Ren Tianhui | 2002 | Tribology Letters2002，13，2： | 1 |
| 14 | The Tribochemical Study of Some N-Containing Heterocyclic Compounds as Lubricating Oil Additives显示文摘 | Zhongyi He Wenqi Rao Tianhui Ren Weimin Liu Qunji Xue | 2002 | Tribology Letters2002，，2： | 1 |
| 15 | Tribological properties of phosphate esters as additives in rape seed oil显示文摘 | Jiusheng Li Wenqi Rao Tianhui Ren | 2003 | Jour Synth Lub2003，20，： | 1 |
| 16 | Research on Online Education of Talent Training and Young Teacher Growth Based on Multimedia Technology显示文摘Information technology education has played a more important role under the background of“Internet+”.However,a combination of education and information technology is only limited between online teaching platforms and massive open online courses(MOOC).This paper proposes a visual teaching system based on cloud computing and big data techniques via combing virtual and real techniques online and offline to provide rich teaching resources for students.It can also use the digital human-computer interaction answering function to address students’questions.Additionally,it can provide a medium for young teachers to quickly improve their professional teaching skills.This paper aims to achieve a multimedia system via integrating“Internet+”technology with education to help improve talent training and abilities of young teachers. | Chunwei Tian Qi Zhang Wenqi Ren Peirong Guo | 2023 | 计算机教育2023，，12： | 0 |
| 17 | Numerical modeling of global seismic phases and its application in seismic phase identification显示文摘Earthquake data include informative seismic phases that require identification for imaging the Earth's structural interior.In order to identify the phases,we created a numerical method to calculate the traveltimes and raypaths by a shooting technique based upon the IASP91 Earth model,and it can calculate the traveltimes and raypaths for not only the seismic phases in the traditional traveltime tables such as IASP91,AK135,but also some phases such as pPcP,pPKIKP,and PPPPP.It is not necessary for this method to mesh the Earth model,and the results from the numerical modeling and its application show that the absolute differences between the calculated and theoretical traveltimes from the ISAP91 tables are less than 0.1 s.Thus,it is simple in manipulation and fast in computation,and can provide a reliable theoretical prediction for the identification of a seismic phase within the acquired earthquake data. | Chanjun Jiang Youxue Wang Bin Xiong Qianci Ren Jinfeng Hu Wenqi Gao Yi Tian Xi Zhuo | 2019 | Earthquake Science2019，32，2： | 0 |
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