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Review on the effect of heat exchanger tubes on flow behavior and heat/mass transfer of the bubble/slurry reactors

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Chinese Journal of Chemical Engineering 2021年第7期34卷 44-61页

作者： le li Yansheng Zhao Wenhao lian Chun Han Qian Zhang Wei Huang Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of TechnologyTaiyuan 030024China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Technology North University of ChinaTaiyuan 030024China Taiyuan Coal Conversion Technology Engineering Co. Ltd.Taiyuan 030024China

Bubble/Slurry bubble column reactors(BCR/SBCR)are intensively used as multiphase reactors for a wide range of application in the chemical,biochemical and petrochemical *** of these applications involve complicate gas–liquid/gas–liquid–solid flow behavior and exothermic process,thus it is necessary to equip the BCR/SBCR with heat exchanger tubes to remove the heat and govern the performance of the *** of experimental and numerical studies have been carried out to describe the phenomena taking place in BCR/SBCRs with heat exchanger ***,little effort has been put on reviewing the experiments and simulations for examining the effect of internals on the performance and hydrodynamics of BCR/*** objective of this work is to give a state-of-the-art review of the literature on the effects of heat exchanger tubes with different types and configurations on flow behavior and heat/mass transfer,then provide adequate information and scientific basis for the design and the development of heat exchanger tubes in BCR/SBCR,ultimately provide reasonable suggestions for better comprehend the performance of different heat exchanger tubes on hydrodynamics.

关键词： Internals Hydrodynamics Heat exchanger tube Bubble/slurry bubble column reactors

Modeling and analyzing point cloud generation in missile-borne liDAR

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Defence Technology（防务技术） 2020年第1期16卷 69-76页

作者： Min-le li Yi-hua Hu Nan-xiang Zhao Qi-shu Qian State Key Laboratory of Pulsed Power Laser Technology College of Electronic EngineeringNational University of Defense TechnologyHefei230037China Anhui Province Key Laboratory of Electronic Restriction Technology Hefei230037China

The missile-borne liDAR has an essential prospect in precise ***,the instability of the missile has a significant impact on the precision of liDAR point cloud,thus modeling and analyzing the influencing factors of point cloud generation is *** this investigation,the authors modeled the point cloud calculation process of missile-borne linear array scanning liDAR under ideal conditions and analyzed the effect of position change on the fleld of view(FOV) in the course of platform ***,the authors summarized that the stability concerning the field of view and the target tracking are dependent on three limiting ***,the authors derived an error formula and analyzed several typical errors in missile platform flight,including scanner error,POS error,system integration error,and platform vibration *** on theo retical analysis and simulation experiments,the model proposed in this papier can provide a theoretical basis for the design of the missile-borne liDAR system and the selection of related instruments in practice.

关键词： liDAR Point cloud Precise guidance Vibration

Single-atom Co-N_(4)catalytic sites anchored on N-doped ordered mesoporous carbon for excellent Zn-air batteries

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Journal of Materials Science & Technology 2023年第8期139卷 224-231页

作者： Na li le li Jiawei Xia Muhammad Arif Shilong Zhou Fengxiang Yin Guangyu He Haiqun Chen Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou UniversityChangzhou 213164China

Developing efficient transition metal-nitrogen-carbon(TM-N-C)catalysts with abundant accessible active sites has been in the limelight in recent years due to their exceptional application potential in Zn-air bat-teries(ZABs).Herein,we report the simple and environmentally-friendly fabrication of a single-atom Co electrocatalyst,Co-SA/N-C_(900),via in-suit pyrolysis of the co-precursor containing sucrose,dicyandiamide,and Co *** Co single atoms coordinated with adjacent N atoms are anchored on the doped ordered mesoporous carbon,generating the atomic Co-N_(4)***-SA/N-C_(900)displays high oxygen reduction reaction(ORR)activity with an onset potential of 0.96 V and a half-wave potential of 0.87 ***,the liquid ZAB with Co-SA/N-C_(900)catalyst exhibits exceptional discharge specific capacity of 706.38 mAh g^(-1),peak power density of 191.11 mW cm^(-2),and excellent stability at high current densities up to 100 mA cm^(-2),surpassing commercial Pt/*** to the density functional theory(DFT)study,the Co-N_(4)moi-ety with graphitic N dopants can decrease the rate-determining step(RDS)energy barrier and thus accel-erate the ORR *** study offers experimental and theoretical guidelines for the rational design of TM-N-C catalysts for practical implementation with notable ORR activity for application in ZABs.

关键词： Single-atom electrocatalyst Co-N_(4)active sites Oxygen reduction reaction Zn-air battery DFT study

Blue AIEgens bearing triphenylethylene peripheral:adjustable intramolecular conjugation and good device performance

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Science Bulletin 2016年第22期61卷 1746-1755页

作者： Can Wang le li Xuejun Zhan Zhijun Ruan Yujun Xie Quanyuan Hu Shanghui Ye Qianqian li Zhen li School of Chemistry and Chemical Engineering Hubei University Institute of Advanced Materials (IAM) Nanjing University of Posts and Telecommunications (NUPT) Department of Chemistry Hubei Key Laboratory on Organic and Polymeric Opto-Electronic Materials Wuhan University

The new approaches to construct deep blue aggregation-induced emission （Ale） materials have been explored, which control the conjugation by two different strategies, to make a great step for the commercialization of organic light-emitting diodes. In order to shorten the intramolecular conjugation length, triphenylethylene （tPE） was utilized to construct blue AIEgens as peripheral groups, instead of tetraphenylethylene （TPE）, the famous AIE star molecule, to yield three blue AIEgens of 3,4-BtPE-PI, 4,4- BtPE-PI and 4,4-BtPE-PPI. Nondoped electroluminescence devices are fabricated by using these three AIEgens as the emitting material layer, the best performance of 3.8 cd/A as the maximum current efficiency achieved at the commission internationale de l＇Eclairage coordinates of （0.17, 0.18）.

关键词： Blue emission Aggregation inducedemission Triphenylethylene OleDs Intramolecular conjugation

Determination of HMO parameters with MS-Xα-SCF method

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Chinese Journal of Chemistry 1991年第5期9卷 399-403页

作者： WANG Yi li le-Min Department of Chemistry Beijing UniversityBeijing 100871

A technique for determining the HMO parameters with MS-Xα-SCF method has been de- veloped. The ionization potentials of even polyenes and condensed benzene compounds have been calculated. The average deviation from t... 详细信息

关键词： HMO Determination of HMO parameters with MS-X SCF method MS

A serologic investigation of epizootic hemorrhagic disease virus in China between 2014 and 2019

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Virologica Sinica 2022年第4期37卷 513-520页

作者： Yingliang Duan Zhenxing Yang Pei Zhu lei Xiao Zhanhong li Zhuoran li le li Jianbo Zhu Yunnan Tropical and Subtropical Animal Virus Diseases Laboratory Yunnan Animal Science and Veterinary InstituteKunming650000China

Epizootic hemorrhagic disease virus(EHDV)is a member of the genus Orbivirus,family *** was firstly recognized in 1955 to cause a highly fatal disease of wild white-tailed deer in *** far,EHDV was detected and isolated in many wild or domestic ruminants,and widely distributed all over the *** the domestic cattle and sheep infected by EHDV were usually asymptomatic or subclinical,several outbreaks of epizootic hemorrhagic disease(EHD)in deer and cattle had been *** EHDV strains were isolated and sequenced in last two decades in China,which promoted a general serologic investigation of EHDV in *** this study,18,122 sera were collected from asymptomatic or subclinical domestic ruminants(cattle,cow,yaks,sheep,goats,and deer)in 116 regions belonging to 15 provinces in *** the sera were tested by EHDV CEliSA,and the results were obtained by big data *** infections were detected in the 14 of 15provinces,and only Tibet(average altitude≥4000 m)which was the highest province in China was free of *** numbers of seropositive collections in both bovine and goat/sheep were in an inverse proportion to the ***,the seropositive rates in bovine were ranged from 0%to 100%,while the seropositive rates in goat/sheep were no more than 50%.The results suggested that bovine was obviously more susceptive for EHDV infection than goat and sheep,therefore might be a major reservoir of EHDV in *** prevalence of EHDV was consistent with the distribution of Culicoides which were known as the sole insect vectors of *** particular,the seropositive rates of EHDV were very high in the southern provinces,which required the enhanced surveillance in the future.

关键词： Epizootic hemorrhagic disease virus(EHDV) Prevalence Ruminant China

End Late Paleozoic tectonic stress field in the southern edge of Junggar Basin

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Geoscience Frontiers 2012年第5期3卷 707-715页

作者： Wei Ju Guiting Hou le li Fangfeng Xiao The Key Laboratory of Orogenic Belts and Crustal Ew~lution Ministry of Education School of Earth and Space Science PekingUniversity Beijing 100871 China Institute of Oil and Gas Research Peking University Beijing 100871 China

This paper presents the end Late Paleozoic tectonic stress field in the southern edge of Junggar Basin by interpreting stress-response structures （dykes, folds, faults with slickenside and conjugate joints）. The direction of the maximum principal stress axes is interpreted to be NW-SE （about 325°）, and the accommodated motion among plates is assigned as the driving force of this tectonic stress field. The average value of the stress index Rt is about 2.09, which indicates a variation from strike-slip to compressive tectonic stress regime in the study area during the end Late Paleozoic period. The reconstruction of the tectonic field in the southern edge of Junggar Basin provides insights into the tectonic deformation processes around the southern Junggar Basin and contributes to the further understanding of basin evolution and tectonic settings during the culmination of the Paleo- zoic.

关键词： Tectonic stress field Junggar Basin End Late Paleozoic Stress-response structures Stress regime

Sensitivity impacts owing to the variations in the type of zero-range pairing forces on the fission properties using the density functional theory

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Nuclear Science and Techniques 2024年第3期35卷 198-207页

作者： Yang Su Ze-Yu li li-le liu Guo-Xiang Dong Xiao-Bao Wang Yong-Jing Chen China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China School of Science Huzhou UniversityHuzhou 313000China

Using the Skyrme density functional theory,potential energy surfaces of^(240)Pu with constraints on the axial quadrupole and octupole deformations(q_(20)and q_(30))were *** volume-like and surface-like pairing forces,as well as a combination of these two forces,were used for the Hartree–Fock–Bogoliubov *** in the least-energy fission path,fission barrier,pairing energy,total kinetic energy,scission line,and mass distribution of the fission fragments based on the different forms of the pairing forces were analyzed and *** fission dynamics were studied based on the timedependent generator coordinate method plus the Gaussian overlap *** results demonstrated a sensitivity of the mass and charge distributions of the fission fragments on the form of the pairing *** on the investigation of the neutron-induced fission of^(239)Pu,among the volume,mixed,and surface pairing forces,the mixed pairing force presented a good reproduction of the experimental data.

关键词： Nuclear fission Density functional theory Pairing force Potential energy surfaces Fission fragment distribution

A Cognitive Interpretation of the English Translation of Chinese Folk Wisecracks from the Perspective of Conceptual Blending Theory

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A Cognitive Interpretation of the English Translation of Chi...

作者： li le 西安外国语大学

学位级别：硕士

歇后语是汉民族的独特语言形式和汉语文化的重要组成部分，其结构独特且具有浓厚的民族文化特色，负载着深厚的文化底蕴。作为汉语特有的语言形式，到目前为止，罕有西方学者探究歇后语，但国内学者们却对其颇为关注并进行了不懈的研究... 详细信息

歇后语是汉民族的独特语言形式和汉语文化的重要组成部分，其结构独特且具有浓厚的民族文化特色，负载着深厚的文化底蕴。作为汉语特有的语言形式，到目前为止，罕有西方学者探究歇后语，但国内学者们却对其颇为关注并进行了不懈的研究：这些研究多侧重于歇后语的表面形式或内部结构等静态模式。但歇后语作为一种特殊的语言形式，其翻译时的动态认知操作为何般？对该问题的探讨尚为数较少。鉴于此，本文从认知视角的概念整合理论出发对歇后语理解及翻译的动态认知机理进行了深入研究和具体探讨。概念整合理论是上世纪90年代福柯尼耶和特纳提出的，它用其四个空间，通过跨空间的映射及有选择的投射，经过三个操作过程，遵循最优化原则，形象地表述了层创结构在整合空间中产生的过程，阐释了语言解读和翻译过程中的认知心理活动及动态推理过程，其中，两个输入空间在阐释歇后语翻译过程中分别可由歇后语原文文本以及译者来充当。基于此理本文提出自己的歇后语翻译概念整合模式。本文先梳理了歇后语的一些基本概念及有关歇后语的研究;接着将翻译与认知结合，在讨论评价前人研究的基础上提出自己的翻译概念整合模式，最后重点将歇后语及其语境和译者及语境分别置于多个输入空间，形成多域空间模式，通过映射、投射和动态的模拟彼此连接起来，对属于不同概念模式的歇后语进行阐释。作者采用《红楼梦》的杨译本为例证，随机抽取里面的歇后语及其翻译进行分析，充分验证该整合模式的科学性和可行性。将歇后语翻译与概念整合理论相结合的研究充分说明了概念整合理论对歇后语翻译过程具有强大的阐释力，向人们较清晰地展示了歇后语翻译的动态认知操作，为歇后语翻译研究提供了新的视角，并对歇后语翻译具有一定的实践指导意义，同时为推进翻译与认知语言学的跨学科研究提供参考。

关键词：歇后语翻译概念整合理论阐释力认知操作《红楼梦》