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Simultaneous improving luminescence intensity and stability of CsPbBr_(3):SCN−@Eu/Zr-Uio-66-NH_(2) with tunable emissions from blue to green and applications in indoor photovoltaics

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Nano Research 2024年第8期17卷 6879-6887页

作者： Minze Li yao sun Honglai Lu Peifen Zhu Ruihong Wang Guofeng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA

The construction of stable and efficient materials that emit blue and green light remains a *** the blue light materials reported,metal-organic framework(MOF)materials are rarely reported as blue phosphors due to their weak luminescence *** on the construction of CsPbBr_(3)@MOF(CPB@MOF),an innovative idea was proposed to simultaneously enhance the green luminescence of CPB and the blue luminescence of MOF through the interaction between CPB and MOF for the first *** expected,the blue luminescence from CPB:7%SCN−@0.5%MOF:Eu as well as the green luminescence from 5%CPB:7%SCN−@MOF:Eu was sufficient to construct high-performance light-emitting diode(LED)devices and further excite solar cells to generate stable photoelectric *** white LED(WLED)device with excellent color quality(color rendering index(CRI)=96.2)and correlated color temperature(CCT=9688 K)can be constructed by using the obtained blue-emitting CPB:7%SCN-@0.5%MOF:Eu,green-emitting 5%CPB:7%SCN−@MOF:Eu,and red-emitting PPB:30%Mn^(2+).The density functional theory(DFT)theoretical calculation results indicate that the p orbital of Pb plays the major role in the conduction band,and the p orbital of Br plays the major role in the valance band of CPB and CPB:SCN−.While the p orbital of O plays the major role in both the conduction band and valance band of *** heat capacity of CPB and CPB:SCN−separately reaches the Dulong–Petit limit at 200 and 400 K,indicating that the thermal stability of CsPbBr_(3)increases after SCN−doping.

关键词： CsPbBr_(3):SCN−@Uio-66-NH_(2) composites luminescence stability white light-emitting diodes(WLEDs) indoor photovoltaics density functional theory(DFT)calculation

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An Improved SCMA Detector Based on ResNet Perception Fusion

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China Communications 2024年第12期21卷 152-165页

作者： Jin Libiao Feng Yuwei Li Shufeng sun yao Yin Fangfang State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing 100024China James Watt School of Engineering University of GlasgowScotland G128QQUK

The received signals used for sparse code multiple access(SCMA)detection are usually contaminated with noise during transmission,which exposes an issue of low decoding *** address this issue,a novel detector based on a residual network(ResNet)perception fusion framework(RSMPA)is proposed for uplink SCMA system in this ***,we first formulate a joint design of perception system and traditional communication module.A perception framework based on ResNet is applied to cancel the noise component and enhance the communication system *** ResNet model is designed and trained using the clean and noisy SCMA signal,*** on the denoised output,information iteration process is executed for multi-user *** results indicate that the perception model achieves an excellent denoising performance for SCMA system and the proposed scheme outperforms the conventional detection algorithms in terms of SER performance.

关键词： perception fusion ResNet SCMA signal detection

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Thermally Chargeable Proton Capacitor Based on Redox-Active Effect for Energy Storage and Low-Grade Heat Conversion

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Energy & Environmental Materials 2023年第1期6卷 384-391页

作者： Yufeng An Zhiwei Li yao sun Zhijie Chen Jiangmin Jiang Hui Dou Xiaogang Zhang Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Material Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 211106China

Thermal energy is abundantly available in our daily life and industrial production,and especially,low-grade heat is often regarded as a *** and utilizing this ignored energy by low-cost and simple technologies may become a smart countermeasure to relieve the energy ***,a unique device has been demonstrated to achieve high value-added conversion of low-grade heat by introducing redox-active organic alizarin(AZ)onto N-doped hollow carbon nanofibers(N–HCNF)***-prepared N–HCNF/AZ can deliver a high specific capacitance of 514.3 F g^(-1)(at 1 A g^(-1))and an outstanding rate capability of 60.3%even at 50 A g^(-1).Meanwhile,the assembled symmetric proton capacitor can deliver a high energy density of 28.0 Wh kg^(-1) at 350.0 W kg^(-1) and a maximum power density of 35.0 kW kg^(-1) at 17.0 Wh kg^(-1).Significantly,the thermally chargeable proton capacitors can attain a surprisingly high Seebeck coefficient of 15.3 mV K^(-1) and a power factor of 6.02µW g^(-1).Taking advantage of such high performance,a satisfying open-circuit voltage of 481.0 mV with a temperature difference of 54 K is *** research provides new insights into construction of high value-added energy systems requiring high electrochemical performances.

关键词： capacitors low-grade heat redox-active effect thermal chargeability

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Insight into the structure-capacity relationship in biomass derived carbon for high-performance sodium-ion batteries

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Journal of Energy Chemistry 2021年第11期30卷 497-504,I0011页

作者： Jianguo sun yao sun Jin An Sam Oh Qilin Gu Weidong Zheng Minhao Goh Kaiyang Zeng Yuan Cheng Li Lu Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore School of Science Harbin Institute of TechnologyShenzhen 518055GuangdongChina National University of Singapore Chongqing Research Institute Chongqing 401123China Graduate School for Integrative Sciences and Engineering National University of SingaporeSingapore 138632Singapore Singapore Institute of Manufacturing Technology A*STAR(Agency for ScienceTechnologyand Research)Singapore 138634Singapore Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore Monash Suzhou Research Institute Suzhou 215123JiangsuChina

Carbonaceous materials are the most promising candidates as the anode for sodium-ion batteries (SIBs), however, they still suffer from low electric conductivity and sluggish sodium ion (Na+) reaction kinetics. Appropriate composition modulation using heteroatoms doping and structure optimization is highly desired. A basic empirical understanding of the structure-capacity relationship is also urgent in tackling the above problems. Herein, multi-functional nitrogen (N) doped carbon micro-rods with enlarged interlayer spacing are synthesized and investigated as the anode in SIBs, showing an ultra-stable capacity of 161.5 mAh g^(−1) at 2 A g^(−1) for over 5000 cycles. Experimental investigations and first-principle calculations indicate that the enlarged interlayer spacing can facilitate Na+ intercalation and N doping can guarantee the high electric conductivity and favorable electrochemical active sites. Additionally, pyridinic N is theoretically proved to be more effective to enhance Na+ adsorption than pyrrolic N due to the lower adsorption energy and stronger binding energy with Na+. Full SIBs show a high capacity and cyclability, making the biomass-derived carbon micro-rods to be a promising anode for practical SIBs applications.

关键词： Biomass Nitrogen doping Hard carbon Sodium-ion batteries

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Alleviating mechanical degradation of hexacyanoferrate via strain locking during Na^(+) insertion/extraction for full sodium ion battery

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Nano Research 2022年第3期15卷 2123-2129页

作者： Jianguo sun Hualin Ye Jin An Sam Oh yao sun Anna Plewa Yumei Wang Tian Wu Kaiyang Zeng Li Lu Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore National University of Singapore Chongqing Research Institute Chongqing 401123China Department of Chemical&Biomolecular Engineering National University of SingaporeSingapore 117585Singapore Integrative Sciences and Engineering Programme NUS Graduate SchoolNational University of SingaporeSingapore 138632Singapore Singapore Institute of Manufacturing Technology A*STAR(Agency for ScienceTechnologyand Research)Singapore 138634Singapore School of Science Harbin Institute of TechnologyShenzhen 518055China Faculty of Energy and Fuels AGH University of Science and Technology al.Mickiewicza 30 30-059 KrakowPoland Institute of Materials Research and Engi

Generation of large strains upon Na^(+) intercalation is one of the prime concerns of the mechanical degradation of Prussian blue(PB)and its *** construction from the atomic level is imperative to maintain structural stability and ameliorate the long-term stability of ***,an inter nickel hexacyanoferrate(NNiFCN)is successfully introduced at the out layer of iron hexacyanoferrate(NFFCN)through ion exchange to improve structural stability through compressive stress locking by forming NNiFCN ***,the kinetics of sodium ion diffusion is enhanced through the built-in electric *** electrochemical performance is therefore significantly improved with a remarkable long-term cycling stability over 3,000 cycles at 500 mA·g^(–1) in the full sodium-ion batteries(SIBs)with a maximum energy density of 91.94 Wh·g^(–1),indicating that the core-shell structured NNiFCN/NFFCN could be the low-cost and high-performance cathode for full SIBs in large-scale EES applications.

关键词： mechanical degradation core-shell structure Prussian blue full sodium-ion battery built-in electric field

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Study on Grain Refining and Metamorphism of ZL111 Aluminium Alloys

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Journal of China University of Mining and Technology 2006年第4期16卷 475-479页

作者： ZHANG Xu-ping REN yao-jian sun Zhi School of Materials Science and Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Vacuum sintering and ball milling methods were employed in the preparation process of Ti-C grain refine- ment and the ability of refiners with varying ratios of Ti and C to refine ZL111 crystal grains was tested. The refinement effect of the Ti-C ratios on tensile strength, elongation percentage, Brinell hardness, pro-eutectoid αAl and the size of the Si phase of ZL111, after modification by rare-earth and strontium nitrate, were studied by means of metallographic examination, SEM and mechanical property tests. The results show that there is an obvious increase in the tensile strength and elongation percentage of refined ZL111 with these new Ti and C refiner compounding powders, while Brinell hardness remained more or less constant. The pro-eutectoid αAl is considerably reduced in size and the Si phase shows a finer and rounder structure. The refiner exhibits a good grain refining performance when the Ti-C ratio is 25:1, for Al crystals can favorably easily form nuclei and grow up along the TiC surface thanks to the TiAl3 generated by sur- plus Ti and Al. The mechanical properties have clearly been improved by the addition of strontium nitrate to ZL111. The effective factors in the modification of mechanical properties of ZL111 are in order of importance: strontium nitrate, Ti-C ratio and rare earth.

关键词： ZL111 aluminium alloy refiner vacuum sintering ball milling Ti-C ratio

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The lightest 4×4 MDS matrices over GL(4, F2)

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Science China(Information Sciences) 2018年第11期61卷 238-240页

作者： Jian BAI Ting LI yao sun Dingkang WANG Dongdai LIN Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems ScienceChinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences

Dear editor,We present an algorithm for searching MDS matrices without any prior structures. We find all the lightest 4×4 MDS matrices over GL(4, F2)that have 10 XOR-counts, including the Toeplitz MDS matrices presented in [1]. We classify all these lightest MDS matrices to 3 types, and give some sufficient and necessary conditions for these3 types matrices for being MDS matrices. Using these conditions, we directly construct more4×4 MDS matrices over GL(m, F2) with 10 XORcounts for m4.

关键词： MDS matrices over GL F2 The lightest 4 GL

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Stable isotopic composition of otoliths in identification of stock structure of small yellow croaker(Larimichthys polyactis) in China

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Acta Oceanologica Sinica 2016年第6期35卷 29-33页

作者： WANG Yukun HUANG Jiansheng TANG Xuexi JIN Xianshi sun yao Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Laboratory of Ecology College of Marine Life SciencesOcean University of China

Oxygen and carbon isotope ratios（δ^（18）O and δ^（13）C） in otoliths were used to identify the stock structure of small yellow croaker,Larimichthys *** were collected from fish at five locations across the Yellow Sea and the Bohai Sea representing most of their distributional range and fisheries *** significant differences in the isotopic signatures showed that the five locations could be chemically distinguished and clearly separated,indicating stock *** of δ^（18）O and δ^（13）C values suggested that population of *** could be divided into the Bohai Sea group,the southern Yellow Sea group and the central Yellow Sea *** analysis of δ^（18）O and δ^（13）C values demonstrated a high significant difference with 85.7% classification *** spatial separation of *** indicated a complex stock structure across the Yellow Sea and the Bohai *** results indicate that optimal fisheries management may require a comprehensive consideration on the current spatial *** study has provided further evidence that measurement of the stable isotopes ratios in otolith can be a valuable tool in the delineation of fishery management units.

关键词： small yellow croaker otolith stable isotope chemistry stock structure

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Output feedback stabilization for power-integrator systems with unknown measurement sensitivity

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Science China(Information Sciences) 2021年第9期64卷 252-254页

作者： Yu SHAO Zong-yao sun Xue-Jun XIE Zhen-Guo LIU Institute of Automation Qufu Normal University Department of Automation Shanxi University

Dear editor,The technical limitations on sensors mean that some state variables will not be detected in any controlled system, so the actual values of an output function will always deviate somewhat from the nominal values. A practical example was given in [1], where the output of an infrared sensor that measures the distance between parts in a magnetic bearing suspension system suffers from measurement error [1].

关键词： Output feedback homogeneous observer unknown measurement sensitivity adding a power integrator reduced-order observer

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Structure of the HRV-C 3C-Rupintrivir Complex Provides New Insights for Inhibitor Design

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Virologica Sinica 2020年第4期35卷 445-454页

作者： Shuai Yuan Kaiyue Fan Zhonghao Chen yao sun Hai Hou Ling Zhu CAS Key Laboratory of Infection and Immunity CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China Key Laboratory for Space Bioscience and Space Biotechnology School of Life SciencesNorthwestern Polytechnical UniversityXi’an 710072China Beijing Forestry University No.35 Tsinghua East RoadHaidian DistrictBeijing 100083China Institute of Medical Research Northwestern Polytechnical UniversityXi’an 710072China Department of Molecular Biophysics and Biochemistry Yale UniversityNew HavenCT 06511USA

Human rhinoviruses(HRVs)are the predominant infectious agents for the common cold *** HRV-C species cause severe illnesses in children and are closely related to acute exacerbations of asthma.3C protease,a highly conserved enzyme,cleaves the viral polyprotein during replication and assists the virus in escaping the host immune *** key roles make 3C protease an important drug target.A few structures of 3Cs complexed with an irreversible inhibitor rupintrivir have been *** structures shed light on the determinants of drug *** we describe the structures of HRV-C153C in free and inhibitor-bound *** volume-decreased S1'subsite and half-closed S2 subsite,which were thought to be unique features of enterovirus A 3C proteases,appear in the HRV-C 3C *** assumes an“intermediate”conformation in the complex,which might open up additional avenues for the design of potent antiviral *** of the features of the three-dimensional structures and the amino acid sequences of 3C proteases suggest new applications for existing drugs.

关键词： Human rhinoviruses(HRVs) 3C protease Three-dimensional structures Inhibitors Rupintrivir(AG7088)

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