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Engineering sphere-like porous FeF3@C cathode with rational interfacial designing towards high-power batteries

Rare Metals 2023年第3期42卷 954-970页

作者： ming-jun Jing jun-Chang Liu Shao-Hui Yuan Wen-Qing Zhao min Liu Yan-Song Bai peng Ge Tian-Jing Wu National Base for International Science&Technology Cooperation National Local Joint Engineering Laboratory for Key Materials of New Energy Storage BatteryKey Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China School of Resource Processing and Bioengineering Central South UniversityChangsha 410083China

Due to the high theoretical capacity and energy density,conversion-type metal fluorides have captured plenty of attentions but still suffer from the inferior kinetic behaviors and serious capacity *** addressing the issues above,the strategies of surface/interface engineering are utilized for the preparation of sphere-like porous FeF3@C materials,where the as-resulted sample displays the uniform particle size(~150 nm in radii)and the ultrathin carbon layers(thickness of~10 nm).Significantly,benefitting from the rich oxygen of precursor,the interfacial chemical bonds Fe-O-C are successfully constructed between carbon matrix and FeF3 materials,accompanying by the enhancements of ions/electrons(e-)conductivity and *** used as Li-storage cathodes,the initial lithium-ions storage capacity could reach up to~400mAh·g^(-1) at 0.1 A·g^(-1).Even at 1.0 A·g^(-1),the capacity could be still remained at about 210 mAh·g^(-1),with the retention of 85%after 400 *** by the detailed kinetic behaviors,the considerable electrochemical properties come from the enhanced diffusion-controlled contributions,whilst the segregation of Fe with LiF is effectively alleviated by unique ***,during cycling,solid electrolyte interface film is reversibly formed/***,this work is expected to offer rational exterior/interfacial designing strategies for metalbased samples.

关键词： Conversion-type Iron fluoride Electrochemistry Kinetic behaviors Secondary batteries

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Generation of Intensity Squeezing in Laser Diodes by Weak External Cavity Feedback

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Chinese Physics Letters 1996年第10期13卷 734-736页

作者： ZHANG Tian-cai HOU Zhan-jia WANG jun-min XIE Chang-de peng Kun-chi Institute of Opto-Electronics Shanxi UniversityTaiyuan 030006

We report the generation of intensity squeezing in a single-mode laser diode by weak external cavity feedback. The measurable squeezing of the output beam is 4.7%, corrected to 8.9% for the actual squeezing. This prov... 详细信息

关键词： measurable squeezing corrected

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Efficacy and safety of low-dose thalidomide combined with mesalazine in the treatment of refractory ulcerative colitis in adults

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Gastroenterology Report 2022年第1期10卷 653-655页

作者： jun-Rong Chen Lei Mai Jia-Chen Sun Xiang peng min Zhang min Zhi Department of General Practice The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Gastroenterology The Fifth Affiliated HospitalSun Yat-sen UniversityZhuhaiGuangdongP.R.China Department of Gastrointestinal Endoscopy The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Gastroenterology The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China

Introduction Inducing and maintaining clinical remission and mucosal healing is essential in the treatment of ulcerative colitis(UC),a nonspecific chronic recurrent inflammatory disorder[1].Mesalazine(5-ASA)is commonly prescribed as a first-line drug for *** the short-term efficacy of ciclosporin and infliximab,some patients may develop methylprednisolone resistance or dependence[2].

关键词： healing clinical treatment

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Continuous Variable Entanglement Distribution for Long-Distance QuantumCommunication

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Chinese Physics Letters 2013年第6期30卷 13-16页

作者： ZHAO jun-jun GUO Xiao-min WANG Xu-Yang WANG Ning LI Yong-min peng Kun-Chi State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006

We develop a frequency-tunable two-color continuous variable entangled state and demonstrate the entanglement distribution over a telecom single mode *** beam of the entangled state(795 nm)can be continuously tuned over a range of 2.4 GHz and the hyperfine transitions of a rubidium D1 line are measured based on saturated absorption *** other beam(1560 nm)is injected into a 5-km single mode fiber to distribute the entanglement,and the entanglement evolution between the transmitted beam and its entangled counterpart is *** system presented here will find potential applications in long-distance quantum information processing.

关键词： spectroscopy. beam saturated

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Ecological and hydrologic evolution history in the sensitive zone of both East Asian summer monsoon and Westerly since the Last Glacial Maximum

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Journal of Mountain Science 2023年第5期20卷 1266-1281页

作者： LI Yu peng Si-min Key Laboratory of Western China’s Environmental Systems(ministry of Education) College of Earth and Environmental SciencesCenter for Hydrologic Cycle and Water Resources in Arid RegionLanzhou UniversityLanzhou 730000China

The Qilian Mountains,located in the northeastern Qinghai-Tibet Plateau,is a sensitive zone of both East Asian summer monsoon(EASM)and westerly winds(WW).The evolution history and driving mechanism of the ecosystem and hydrologic cycle in this region on long-term timescales have not yet been *** this study,we comprehensively study the hydrologic and ecological evolution history in the sensitive zone since the Last Glacial Maximum(LGM)by integrating surface sediments,paleoclimate records,TraCE-21ka transient simulations,and PMIP3-CMIP5 multi-model *** show that hydrologic and ecological proxies from surface sediments are significantly different from west to east and mainly divided into three sections:the monsoonaffected region in the eastern Qilian Mountains,the intersection region in the central Qilian Mountains,and the westerly-affected region in the western Qilian ***,paleo-ecological and paleohydrologic reconstructions from the surroundings uncover a synchronous climate evolution that the EASM mainly controls the eastern Qilian Mountains and penetrates the central Qilian Mountains in monsoon intensity maximum,while the WW dominates the central and western Qilian Mountains on both glacial-interglacial and millennial *** simulation results further bear out the glacial humid climate in the central and western Qilian Mountains caused by the enhanced WW,and the humidity maximum in the eastern Qilian Mountains controlled by the strong mid-Holocene *** general,east-west differences in climate pattern and response for the EASM and the WW are integrally stable on both short-term and long-term timescales.

关键词： EastAsian summer monsoon Westerly winds Last Glacial Maximum Ecological and hydrologic evolution history Qilian Mountains

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Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第6期14卷 526-532页

作者： Zhen-zhen peng Xin-min CHEN jun WANG Ai-jie LI Zu-jie XU State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan University

Objective:This study investigated the effect of proximal contact strength on the three-dimensional displacements of cantilever fixed partial denture(CFPD) under vertically concentrated loading with digital laser speckle(DLS) ***:Fresh mandible of beagle dog was used to establish the implant-supported CFPD for *** technique was employed for measuring the three-dimensional displacement of the prosthesis under vertically concentrated loading ranging from 200 to 3 000 *** effect of the contact tightness on the displacement of CFPD was investigated by means of changing the contact ***:When an axial concentrated loading was exerted on the pontic of the implant-supported CFPD,the displacement of the CFPD was the *** displacement of the prosthesis decreased with the increase of contact *** the contact strength was 0,0.95,and 3.25 N,the displacement of the buccolingual direction was smaller than that of the mesiodistal direction but greater than that of the occlusogingival *** the force on the contact area was 6.50 N,the mesiodistal displacement of the prosthesis was the biggest while the buccolingual displacement was the ***:The implant supported CFPD is an effective therapy for fully or partially edentulous *** restoration of the contact area and the selection of the appropriate contact strength can reduce the displacement of the CFPD,and get a better stress *** most appropriate force value is 3.25 N in this study.

关键词： Cantilever fixed partial denture Digital laser speckle technique Contact strength Three-dimensional displacement

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Solar Flare Forecast Model Based on Resampling and Fusion Method

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Research in Astronomy and Astrophysics 2022年第8期22卷 238-248页

作者： Jie Wan jun-Feng Fu Dai-min Tan Ke Han Meng-Yao Yu peng E Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China School of Computer and Information Engineering Harbin University of CommerceHarbin 150028China

Predicting the activity of solar flares is of great significance for studying its physical mechanism and the impact on human production and *** such as class imbalance,high time-series sensitivity,and over-localization of important features exist in the sample data used for flare *** design a solar flare fusion method based on resampling and the CNN-GRU algorithm to try to solve the above *** order to verify the effectiveness of this fusion method,first,we compared the forecast performance of different resampling methods by keeping the forecast model ***,we used the resampling algorithm with high performance to combine some single forecast models and fusion forecast models *** use the 2010-2017 sunspot data set to train and test the performance of the flare model in predicting flare events in the next 48 *** the conclusion of the above steps,we prove that the resampling method SMOTE and its variant SMOTE-ENN are more advantageous in class imbalance problem of flare *** addition,after the fusion of one-dimensional convolution and recurrent network with"forget-gate",combined with the SMOTE-ENN to achieve TSS=61%,HSS=61%,TP_(Rate)=77%and TN_(Rate)=83%.This proves that the fusion model based on resampling and the CNN-GRU algorithm is more suitable for solar flare forecasting.

关键词： (Sun:)sunspots Sun:flares Sun:X-rays gamma-rays Sun:magnetic fields Sun:corona

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Relationship Between Grain Yield and Yield Components in Super Hybrid Rice

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Agricultural Sciences in China 2011年第10期10卷 1537-1544页

作者： HUANG min ZOU Ying-bin JIANG peng XIA Bing Md Ibrahim AO He-jun College of Agronomy Hunan Agricultural University Changsha 410128 P.R.China

Chinese super hybrid rice breeding project has developed many new varieties with great yield potential. It is controversial which yield component should be emphasized in super hybrid rice production. The present study was conducted to compare super hybrid rice with common hybrid and super inbred rice and analyze contributions of yield components to grain yield of super hybrid rice under experimental conditions, and evaluate relationships between grain yield and yield components of super hybrid rice in farmer’s paddy fields. Field experiments were done in Changsha, Guidong, and Nanxian, Hunan Province, China, from 2007 to 2009. Eight super hybrid varieties, one common hybrid variety, and one super inbred variety were grown in each location and year. Rice production investigation was undertaken in high-yielding （Guidong）, moderate-yielding （Nanxian）, and low-yielding （Ningxiang） regions of Hunan Province, China, in 2009. Grain yield and yield components were measured in both the field experiments and rice production investigation. Super hybrid rice varieties outyielded common hybrid and super inbred varieties across three locations and years. Yield potential has been increased by 11.4% in super hybrid rice varieties compared with common and super inbred varieties. The higher yield of super hybrid varieties was attributed to improvement in panicle size. Panicles per m2 had the highest positive contribution to grain yield with the exception under yield level of 10.0 to 12.0 t ha-1, and was positively related to grain yield in farmer’s field at all of the high-, moderate-, and low-yielding regions. Our study suggests that panicle per m2 ought to be emphasized in super hybrid rice production.

关键词： super hybrid rice yield panicle number panicle size

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Upwelling current and its relationship to the enrichment of organic matter in the Lower Silurian Longmaxi Formation,northern Chongqing-western Hubei area,southern China

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Journal of Palaeogeography 2024年第4期13卷 993-1015页

作者： jun-jun Shen Jia-Kai Yan peng-Wan Wang Yu-Man Wang Lin Zhou Yu-Bing Ji min Xu Hubei Cooperative Innovation Center of Unconventional Oil and Gas of Yangtze University Wuhan 430100Hubei ProvinceChina Hydrogeology and Engineering Geology Institute of Hubei Geological Bureau Jingzhou 434020Hubei ProvinceChina PetroChina Hangzhou Institute of Petroleum Geology Hangzhou 310023Zhejiang ProvinceChina PetroChina Research Institute of Petroleum Exploration and Development Bejing 100083China Exploration and Production Research Institute Jianghan Oifield CompanySINOPECWuhan 430100Hubei ProvinceChina Zhejiang Oilfield Company Integrated Center of Exploration and Development Hangzhou 310000Zhejiang ProvinceChina

Upwelling currents play a crucial role in the enrichment of organic matter,yet the mechanisms driving this process remain incompletely understood due to methodological and data resolution *** this paper,we employ a combination of biostratigraphic classification,qualitative methods,and quantitative methods to systematically analyze the sedimentological and geochemical characteristics of the Lower Silurian Longmaxi Formation in the northern Chongqing-western Hubei area,southern *** relationship between the upwelling currents and organic matter enrichment in the shale of the Longmaxi Formation is *** indicate that the upwelling currents in the study area were primarily influenced by the foreland flexure *** the Rhuddanian(flexure-sedimentation stage)to the Aeronian(flexure-migration stage),the more intense tectonic activity led to gradual opening of the barrier between the South Qinling Ocean and the Yangtze Platform,resulting in an increase in the influx of the oceanic *** upwelling currents significantly contributed to the organic matter production,albeit without substantially affecting the preservation *** the succession of the Longmaxi Formation,the organic matter content decreased gradually from the passive continental margin to the foreland flexural stagnant basin,which was mainly due to deterioration of the preservation conditions as a result of sea level fall and increased terrigenous *** the increase in the upwelling currents,they did not decisively control the organic matter ***,during the Rhuddanian to Aeronian period,the organic matter content decreased similarly from the passive continental margin to the foreland flexural stagnant basin,influenced by reduced organic matter production caused by weakening of the upwelling currents and the worsening preservation conditions caused by sea-level *** terrigenous input had a relatively minor *** results of t

关键词： Middle-Upper Yangtze Ordovician-Silurian transition Black shale Passive continental margin Foreland flexural stagnant basin Sedimentary paleoenvironment

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Amine-Actuated Catalyst Switch for One-Pot Synthesis of Ether-Ester Type Block Copolymers

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Chinese Journal of Polymer Science 2024年第12期42卷 1925-1932,I0008页

作者： Hong Qiu peng-Fei Zhang jun-peng Zhao Faculty of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China

Organocatalysis has shown special potency for simplifying the construction of complex polymer *** are reporting here a one-pot synthetic pathway using amine as a selectivity-switching agent in the two-component catalytic system consisting of triethylborane(Et_(3)B)and a phosphazene *** first modelled the interactions of a variety of amines with Et_(3)B by density functional theory *** results indicate that the aliphatic diamines comprising both primary and tertiary amino groups,capable of forming stable intramolecular hydrogen bonds,undergo the strongest complexation with Et_(3)***,experimental results demonstrate that the addition of such amines promptly actuates the in situ selectivity switch from Lewis pair-catalyzed ring-opening polymerization(ROP)of epoxide(propylene oxide,n-butylglycidyl ether,or glycidyl phenyl ether)to organobase-catalyzed ROP ofδ-valerolactone,allowing one-pot continuous synthesis of ether-ester type block *** thus exploited the noncovalent interaction between amine and Et_(3)B to refine the catalyst switch strategy by exempting it from loading of extra catalyst.

关键词： Ring-opening polmerization Block copolymers Organocatalysis

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