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Journal of Energy Chemistry 2022年第8期31卷 218-224,I0007页

作者： Haonan Wang Tianyi hou hang Cheng Bowen Jiang Henghui Xu Yunhui Huang School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430000HubeiChina

The development of polymer-based solid-state batteries is severely limited by the low ionic conductivity of solid polymer electrolyte and the instable interface between polymer electrolyte and li-metal *** this work,lithium iodide(liI)as a bifunctional additive was introduced into the poly(ethylene oxide)(PEO)-based electrolyte to improve the ionic conductivity and to construct a stable interphase at the li/PEO interface.I-anions offer a strong electrostatic interaction with hydrogen atoms on PEO chains(HPEO)and forming massive I–H bonds that cross-link PEO chains,decrease crystallinity of PEO,and thus improve li~+interchain *** addition,liI participates in the formation of an inorganic-rich interphase layer,which decreases the energy barrier of li+transport across the interface and thus inhibits the growth of lithium *** a result,the composite PEO electrolyte with 2 wt%liI(PEO-2 liI)presents a very high ionic conductivity of 2.1×10^(-4) S cm-1 and a critical current density of 2.0 m A cm^(-2) at 45°*** symmetric cell with this PEO-2 liI electrolyte exhibits a long-term cyclability over 600 h at 0.2 m A cm^(-2).Furthermore,solid-state liFePO_(4) and liNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) batteries with the PEO-2 liI electrolyte show an impressive electrochemical performance with outstanding cycling stability and rate capability at 45°C.

关键词： Solid-state battery liI Electrostatic interaction Crystallinity Interface

C-type lectin receptor-mediated immune recognition and response of the microbiota in the gut

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Gastroenterology Report 2019年第5期7卷 312-321,I0001页

作者： Tian-hang li ling liu Ya-Yi hou Su-Nan Shen Ting-Ting Wang Immunology and Reproduction Biology Lab Medical School of Nanjing UniversityState Key Laboratory of Pharmaceutical BiotechnologyNanjing UniversityNanjingJiangsuP.R.China Jiangsu Key Laboratory of Molecular Medicine Nanjing UniversityNanjingJiangsuP.R.China

C-type lectin receptors(CLRs)are powerful pattern-recognition receptors that discern‘self’and‘non-self’in our body and protect us from invasive pathogens by mediating immune recognition and *** gastrointestinal tract is very important for the maintenance of homeostasis;it is the largest shelter for the billions of microorganisms in the body and CLRs play a crucial regulatory role in this *** study focuses on several CLRs,including Dectin-1,Dectin-2,Dectin-3 and *** summarize the roles of CLRs in maintaining gastrointestinal immune-system homeostasis,especially their functions in mediating immune recognition and responses in the gut,discuss their relationships to some diseases,highlight the significance of CLR-mediated sensing of microbial and non-microbial compounds in the gut immune system and identify new therapeutic targets.

关键词： C-type lectin receptors(CLRs) microbiota immunity inflammatory bowel disease(IBD)

Predominance of inhalation route in short-range transmission of respiratory viruses:Investigation based on computational fluid dynamics

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Building Simulation 2023年第5期16卷 765-780页

作者： Wenzhao Chen li liu Jian hang Yuguo li Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina Department of Building Science Tsinghua UniversityBeijing 100084China School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Faculty of Architecture The University of Hong KongPokfulam RoadHong KongChina

During the coronavirus disease 2019 pandemic,short-range virus transmission has been observed to have a higher risk of causing infection than long-range virus ***,the roles played by the inhalation and large droplet routes cannot be distinguished in practice.A recent analytical study revealed the predominance of short-range inhalation over the large droplet spray route as causes of respiratory *** the current study,short-range exposure was analyzed via computational fluid dynamics(CFD)simulations using a discrete phase *** facial membranes,including eyes,nostrils,and a mouth,were *** CFD simulations,there is no need for a spherical approximation of the human head for estimating deposition nor the“anisokinetic aerosol sampling”approximation for estimating inhalation in the analytical *** considered two scenarios(with two spheres[Scenario 1]and two human manikins[Scenario 2]),source-target distances of 0.2 to 2 m,and droplet diameters of 3 to 1,500μ*** overall CFD exposure results agree well with data previously obtained from a simple analytical *** CFD results confirm the predominance of the short-range inhalation route beyond 0.2 m for expiratory droplets smaller than 50μm during talking and coughing.A critical droplet size of 87.5μm was found to differentiate droplet *** number of droplets deposited on the target head exceeded those exposed to facial membranes,which implies a risk of exposure through the immediate surface route over a short range.

关键词： airborne transmission close contact short-range inhalation large droplet spray computational fluid dynamics

Rhodium-catalyzed addition reactions of benzylic C–H bonds to cyclic N-sulfonyl ketimines viaπ-coordination

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Chinese Chemical Letters 2024年第3期35卷 287-291页

作者： Yuntong li hang Shi Department of Chemistry Zhejiang UniversityHangzhou 310027China Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of ChemistrySchool of Science and Research Center for Industries of the FutureWestlake UniversityHangzhou 310030China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China

Mannich-type reactions are a widely used method for the synthesis of amines due to the readily availability of nucleophiles and ***,the inclusion of alkylarenes instead of active carbon pronucleophiles such as aldehydes and ketones in these addition reactions has been a challenge due to the inherent difficulty of benzylic *** this study,we present a novel approach for the construction of N-sulfonyl amines via rhodium-catalyzed addition of unbiased benzylic C–H bonds to cyclic N-sulfonyl ketamines throughπ-*** strategy enables the synthesis of a diverse range of N-sulfonyl amines,and subsequent diversification of the addition products showcases the synthetic potential of this protocol.

关键词： Benzylic deprotonation Cyclic N–sulfonyl ketimines π-Coordination Mannich-type addition Rhodium catalysis

Optimization of strand and final electromagnetic stirrers of round bloom casters with multiple sections

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International Journal of Minerals,Metallurgy and Materials 2016年第10期23卷 1150-1156页

作者： Rui Wang Yan-ping Bao Yi-hong li hang-hang An State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Material Science and Technology Taiyuan University of Science and Technology

Strand electromagnetic stirring（S-EMS） and final electromagnetic stirring（F-EMS） are the main methods used to improve the center porosity and segregation for round blooms. To optimize the stirring conditions, nail shooting tests were conducted for three sections of large round blooms with diameters of ф380 mm, ф450 mm, and ф600 mm. Acid leaching and sulfur print tests were used to investigate the shell thickness. Based on the results of nail shooting tests, a mathematical model of solidification was established, and the variation of shell thickness and the central solid fraction were exactly calculated by the model. By taking all sections into account, the locations of S-EMS and F-EMS were optimized for each section. In the results, the macro-segregation of various sections is improved after the locations of S-EMS and F-EMS systems are changed.

关键词： continuous casting electromagnetic stirring blooms mathematical models optimization

Deep learning for natural language processing:advantages and challenges

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National Science Review 2018年第1期5卷 24-26页

作者： hang li Noah’s Ark Lab Huawei Technologies

INTRODUCTION Deep learning refers to machine learning technologies for learning and utilizing’deep’artificial neural networks,such as deep neural networks(DNN),convolutional neural networks(CNN)and recurrent neural networks(RNN).Recently,deep leaminghasbeen successfiully applied to natural language processing and significant progress has been *** paper summarizes the recent advancement of deep learning for natural language processing and discusses its advantages and challenges.

关键词： Deep learning for natural language processing:advantages and challenges

Highly efficient and stable 2D/3D perovskite solar cells based on surface reconstruction and energy level alignment

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Science China Chemistry 2024年第9期67卷 3083-3090页

作者： Qiaohui li hang liu Tong Zhou Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science and TechnologyQingdao 266042China The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China

Realizing simultaneous adjustment of energy levels and work functions in two-dimensional/three-dimensional(2D/3D)perovskite solar cells(PSCs)is a ***,a pseudohalide 3,5-bis(trifluoromethyl)benzylammonium tetrafluoroborate(TFPMABF_(4))was used to react with unreacted Pb I2on the surface of 3D bulky perovskite to form a mixed halide of 2D perovskite denoted(TF-PMA)_(2)FA_(2)Pb_(3)I_(8)(BF_(4))_(2).This novel 2D/3D perovskite enables the simultaneous adjustment of energy levels and work functions on the surface of active *** to the significantly enhanced quality of 2D/3D perovskite film,decreased surface defects and increased charge carrier lifetime,the 2D/3D PSCs exhibit an outstanding power conversion efficiency(PCE)of 25.15%and a high V_(OC)of 1.194 ***,2D/3D PSCs exhibit remarkable enhancements in environmental stability,unencapsulated devices retaining more than 90%of their initial PCE at 50%humidity for 2,280 h.

关键词： 2D/3D perovskite perovskite solar cells organic spacers energy levels alignment

Methane reforming with CO_2 to syngas over CeO_2-promoted Ni/Al_2O_3-ZrO_2 catalysts prepared via a direct sol-gel process

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Journal of Natural Gas Chemistry 2011年第1期20卷 1-8页

作者： Hansheng li hang Xu Jinfu Wang School of Chemical Engineering and the Environment Beijing Institute of Technology Beijing 100081 China Department of Chemical Engineering Tsinghua University Beijing 100084 China

CeO2-promoted Ni/Al2O3-ZrO2 （Ni/Al2O3-ZrO2-CeO2） catalysts were prepared by a direct sol-gel process with citric acid as gelling agent. The catalysts used for the methane reforming with CO2 was studied by infrared spectroscopy （IR）, thermal gravimetric analysis （TGA）, microscopic analysis, X-ray diffraction （XRD） and temperature-programmed reduction （TPR）. The catalytic performance for CO2 reforming of methane to synthesis gas was investigated in a continuous-flow micro-reactor under atmospheric pressure. TGA, IR, XRD and microscopic analysis show that the catalysts prepared by the direct sol-gel process consist of Ni particles with a nanostructure of around 5 nm and an amorphous-phase composite oxide support. There exists a chemical interaction between metallic Ni particles and supports, which makes metallic Ni well dispersed, highly active and stable. The addition of CeO2 effectively improves the dispersion and the stability of Ni particles of the prepared catalysts, and enhances the adsorption of CO2 on the surface of catalysts. The catalytic tests for methane reforming with CO2 to synthesis gas show that the Ni/Al2O3-ZrO2-CeO2 catalysts show excellent activity and stability compared with the Ni/Al2O3 catalyst. The excellent catalytic activity and stability of the Ni/Al2O3-ZrO2-CeO2 are attributed to the highly, uniformly and stably dispersed small metallic Ni particles, the high reducibility of the Ni oxides and the interaction between metallic Ni particles and the composite oxide supports.

关键词： methane reforming with CO2 syngas Ni-based catalyst CeO2 sol-gel process

Thickness and strain engineering of structural and electronic properties for 2D square-octagon AlN

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International Journal of Smart and Nano Materials 2020年第3期11卷 288-297页

作者： Wantong hou Zhanbin Qi hang Zang Yan Yan Zhiming Shi College of Science Changchun UniversityChangchunChina State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

Two-dimensional(2D)semiconductors exhibit great potential to minimize the size and drastically reduce the energy consumption of optoelectronic devices due to promising features induced by quantum *** has achieved many successes in infra-red and visible light optoelectronic *** study on ultra-wide band gap 2D semiconductors except h-BN are still limited,however,the requirement is more and more *** by the progresses of III-nitride semiconductors in recent several decades,2D AlN is highly expected to be a new member of ultra-wide band gap 2D *** this work,we employed the first-principles calculations to investigate the structural and electronic properties of 2D *** revealed that few-layer AlN acquires a square-octagon(so-AlN)configuration in the vertical direction when the number of atomic layers n is smaller than *** increasing the thickness from 2 ML to 8 ML,the band gap decreased due to the weakening of quantum confinement *** demonstrated the intrinsic indirect band gap can be tuned to be direct by applying different direction strains for *** results open new avenues for their application in nano-optoelectronics.

关键词： Square-octagon AlN electronic structures strain engineering ultra-wide band gap semiconductors firstprinciples calculation

Elimination of the Coherent Artifact in a Pump-Probe Experiment by Directly Detecting the Background-Free Diffraction Signal

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Chinese Physics Letters 2011年第8期28卷 229-232页

作者： liU Hui Zhang hang SI Jin-Hai YAN li-He CHEN Feng hou Xun Key Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Lab of Information Photonic Technique School of Electronics&information EngineeringXi'an Jiaotong UniversityXi'an 710049

The influence of the coherent artifact in a semiconductor Ga-doped ZnO film on femtosecond pump-probe measurement is *** coherent artifact mixed into the pump-probe signal can be directly inspected by detecting the background-free first-order diffraction signal induced by the interference between the pump and probe *** results show that by varying the polarization angle or adjusting the relative intensity between the pump and probe pulses,the coherent artifact can be eliminated from the pump-probe measurement.

关键词： measurement coherent Probe