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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 250-259页

作者： Ying SUN miaomiao FU jingyang m.o Guoliang WEI Business School University of Shanghai for Science and TechnologyShanghai200093China Shanghai Caoyang Vocational School Shanghai200333China School of Electrical and Electronic Engineering Shanghai Institute of TechnologyShanghai201418China School of Intelligent Emergency management University of Shanghai for Science and TechnologyShanghai200093China

Cyber-physical systems(CPSs)take on the characteristics of both multiple rates of information collection and processing and the dependency on information *** purpose of this paper is to develop a joint recursive filtering scheme that estimates both unknown inputs and system states for multi-rate CPSs with unknown *** cyberspace,the information transmission between the local joint filter and the sensors is governed by an adaptive event-triggered ***,the desired parameters of joint filters are determined by a set of algebraic matrix equations in a recursive way,and a sufficient condition verifying the boundedness of filtering error covariance is found by resorting to some algebraic operation.A state fusion estimation scheme that uses local state estimation is proposed based on the covariance intersection(CI)based fusion ***,an illustrative example demonstrates the effectiveness of the proposed adaptive event-triggered recursive filtering algorithm.

关键词： Cyber-physical systems multi-rate Joint recursive filtering Adaptive event-triggered mechanisms Unknown inputs

Parallelogram 3d-4f-5d heterometallic clusters based on trilacunary tungstoantimonates with excellent proton conductivity

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Chinese Chemical Letters 2024年第3期35卷 528-531页

作者： Haiying Wang Han Xu Chaolong Chen Yingjie Zhu Yikang Zhang Dongdi Zhang jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Molecular SciencesHenan UniversityKaifeng 475004China School of Pharmaceutical Science&Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical UniversityKunming 650500China Collaborative Innovation Center of Chemistry for Energy materials State Key Laboratory of Physical Chemistry of Solid Surface and Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Two 3d-4f-5d heterometallic cluster-containing polyoxometalates,formulated as Na_(22){(SbW_(9)o_(33))_(4)[La_(3)W_(6)mo_(18)(H_(2)o)_(8)(CH_(3)Coo)_(4)]_(2)}·nH_(2)o(abbreviated as La_(6)m_(2),m=Co/mn)were synthesized and structurally ***-crystal X-ray diffraction analyses reveal that the polyanions of La_(6)Co_(2)and La_(6)mn_(2)consist of the uncom.on 3d-4f-5d clusters{La_(6)W_(12)Co_(2)}and{La_(6)W_(12)mn_(2)},which are encapsulated by four trilacunary Keggin tungstoantimonates to form the parallelogram-shaped title ***,the polyanions can be extended into a two-dimensional(2D)frame by the linkage of peripheral Na+*** inner space of the 2D layer was filled with water molecules and thus an H-bonded network was formed,which is expected to exhibit a fascinating proton *** study of water-assisted proton conduction demonstrated that La_(6)Co_(2)and La_(6)mn_(2)were temperature-and humiditydependent proton conductors,respectively,and the proton conductivities could reach 1.3×10^(-2)and 2.3×10^(-2)S/cm at 65℃and 90%RH conditions.

关键词： Polyoxometalate Parallelogram Heterometallic 3d-4f-5d cluster Proton conductivity

Continuous Production of Formic Acid Solution from Electrocatalytic Co_(2) Reduction Using mesoporous Bi_(2)o_(3) Nanosheets as Catalyst

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CCS Chemistry 2024年第1期6卷 100-109页

作者： Zhonghao Tan Jianling Zhang Yisen Yang Jiajun Zhong Yingzhe Zhao jingyang Hu Yanyue Wang Zhuizhui Su Beijing National Laboratory for molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049

Electrochemical reduction of Co_(2) to formic acid(HCooH)is an im.ortant route for storing renewable energy and achieving carbon ***,we propose the continuous production of HCooH solution from electrocatalytic Co_(2) reduction using highly mesoporous bismuth oxide(Bi_(2)o_(3))nanosheets as an electrocatalyst and membrane electrode assembly with solid-state electrolyte as an ***,0.1 m.of HCooH solution could be produced continuously at a current density of -56 mA cm^(-2) for at least 43 *** underlying mechanism for the high performance of the electrocatalytic system was investigated by experimental studies and theoretical calculations.

关键词： Co_(2)electroreduction formic acid Bi_(2)o_(3)nanosheet solid-state electrolyte Zn-Co_(2)battery

Theoretical studies of two-dimensional structure design and topological electronic properties of organic Dirac materials

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ChemPhysmater 2024年第3期3卷 241-251页

作者： Aizhu Wang Wei Tan Hongbo Zhao Hongguang Wang Na Ren Longhua Ding Xin Yu jingyang Peng Institute for Advanced Interdisciplinary Research University of JinanJinan 250022China Institute of Photonic Chips University of Shanghai for Science and TechnologyShanghai 200093China

owing to the significant development in graphene,an increasing number of studies have been conducted to identify novel two-dimensional(2D)organic materials with Dirac cones and topological *** a series of toy models based on specific lattice patterns has been proposed and demonstrated to possess a Dirac cone,realistic materials corresponding to the lattice models must be identified to achieve excellent properties for practical *** understand factors contributing to the rarity of 2D organic Dirac materials and provide guidance for identifying novel organic Dirac systems,we review recent theoretical studies pertaining to various 2D Dirac models and their corresponding organic Dirac materials,including the Haldane,Kagome,Libe,linecentered honeycomb,and Cairo pentagonal ***,the corresponding structural and topological electronic properties are ***,we investigate the relationship between the existence of Dirac cones and their structural features,as well as the manner by which Dirac points emerge and propagate in these systems.

关键词： Two-dimensional Dirac models organic Dirac materials Covalent-organic frameworks metal-organic frameworks Topological electronic properties

基于Ti原子杂化微孔晶体结构的Co_(2)吸附特性和电荷转移机理研究

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工程热物理学报 2024年第1期45卷 115-121页

作者：杨宁刘振宇郝敬洋周云龙东北电力大学能源与动力工程学院吉林132012

替换SIFSIX类杂化微孔材料的金属位点或有机配体可以合成大量具有不同孔径的化合物,TiF_(6)^(2-)配体对Co_(2)吸附和电荷转移特性的影响机理尚不充分。本研究以此为背景在SIFSIX-3-Zn的基础上将SiF_(6)^(2-)的Si原子替换为Ti原子,构建了... 详细信息

替换SIFSIX类杂化微孔材料的金属位点或有机配体可以合成大量具有不同孔径的化合物,TiF_(6)^(2-)配体对Co_(2)吸附和电荷转移特性的影响机理尚不充分。本研究以此为背景在SIFSIX-3-Zn的基础上将SiF_(6)^(2-)的Si原子替换为Ti原子,构建了TiFSIX-3-Fe和TiFSIX-3-Zn模型,通过DFT分析了TiFSIX-3-m(TiF_(6)^(2-)为离子配体,m为金属位点,m=Fe/Zn)中Co_(2)在孔道内的吸附与电荷转移行为,计算了孔道内的Co_(2)吸附位点、能带结构、吸附能、差分电荷密度、mulliken电荷分布。研究结果表明:TiFSIX-3-Fe和TiFSIX-3-Zn具有更小的孔道体积,分别为1.26×10^(5)nm^(3)和1.22×10^(5)nm^(3)。Ti原子加入改善了TiFSIX-3-Fe的能带结构,但对TIFSIX-3-Zn影响不明显。Ti构建的两种模型的吸附能最高分别为-0.356 e V和-0.361 eV。差分电荷密度表明电荷从F原子附近向C原子转移,结合mulliken布居分析得到构型中电荷转移数量分别增大至0.072 e和0.075 e,TiFSIX-3-Fe和TiFSIX-3-Zn的Co_(2)吸附和电荷转移特性显著增强。本工作为开发具有高效Co_(2)捕集能力的杂化微孔材料提供了理论指导。

关键词： Co_(2)吸附 Ti原子掺杂电荷转移特性密度泛函理论

红外窗口对封装黑体辐射理想度的影响及修正方法

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光子学报 2024年第7期53卷 153-165页

作者：张镜洋孟令琪牟新竹沈萍绪升南京航空航天大学航天学院南京211106

针对宽温域黑体有封装红外窗口介入而影响黑体理想度的问题,建立了面源黑体靶面热光耦合仿真模型,利用monte-Carlo光线追迹法分析了窗口对黑体7.5μm~13μm波段表观辐射通量的影响规律及内因,提出并验证了符合实际表观辐射通量的定标温... 详细信息

针对宽温域黑体有封装红外窗口介入而影响黑体理想度的问题,建立了面源黑体靶面热光耦合仿真模型,利用monte-Carlo光线追迹法分析了窗口对黑体7.5μm~13μm波段表观辐射通量的影响规律及内因,提出并验证了符合实际表观辐射通量的定标温度修正方法。结果表明:定标温度为−50℃~+50℃时,定标温度越低于环境温度,定标温度与实际表观辐射通量对应的表观温度间正误差越大,反之则负误差越大,最大可达−4℃~+13℃,这是因为窗口存在增强杂散辐射与衰减靶面发射辐射正逆博弈影响表观辐射通量的效应。提出了关联环境温度与定标温度的定标温度修正方法,实验实测下该方法可使修正后的定标温度最大误差缩减50%以上,提升了基于封装黑体的红外定标精度。

关键词：光学窗口黑体辐射红外探测器定标 monte-Carlo方法温度修正

低成本高结晶GaN纳米线柔性薄膜制备及其场发射性能

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北京工业大学学报 2024年第9期50卷 1038-1048页

作者：王如志张京阳杨孟骐王佳兴郑坤北京工业大学材料与制造学部北京100124 新型功能材料教育部重点实验室北京100124 固体微结构与性能北京市重点实验室北京100124

旨在探究非贵金属Cu替代贵金属Au作为催化剂在柔性碳膜上制备高结晶的GaN纳米线的可行性,并研究其场发射特性及机理。采用非贵金属Cu替代贵金属Au作为催化剂,在柔性碳膜上制备了直径为20~100 nm、长度为3~15μm的高结晶的GaN纳米线,并... 详细信息

旨在探究非贵金属Cu替代贵金属Au作为催化剂在柔性碳膜上制备高结晶的GaN纳米线的可行性,并研究其场发射特性及机理。采用非贵金属Cu替代贵金属Au作为催化剂,在柔性碳膜上制备了直径为20~100 nm、长度为3~15μm的高结晶的GaN纳米线,并通过工艺参数对其结构与尺寸进行调控,得到GaN纳米线薄膜的催化生长机制。通过对其场发射特性进行研究,发现其场发射性能与其纳米结构紧密相关,催化剂厚度以及薄膜弯曲状态可显著影响其场发射性能。结果表明,采用Cu作为催化剂所制备的GaN纳米线柔性薄膜的场发射电流具有较好的稳定性。该研究为GaN纳米线的低成本制备方法提供了可借鉴思路,同时也为场发射柔性器件的制作提供了可行的技术手段。

关键词：氮化镓(GaN) 纳米线场发射柔性薄膜 Cu催化剂低成本制备

Effects of Sintering method and Sintering Temperature on the microstructure and Properties of Porous Y_2Sio_5

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Journal of materials Science & Technology 2015年第12期31卷 1237-1243页

作者： Zhen Wu Luchao Sun jingyang Wang University of Science and Technology of China High-performance Ceramics Division Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences

Porous Y 2Sio 5 ceramic is a promising high-temperature thermal insulator in harsh ***,all the published relevant works faced serious problems,such as severe linear shrinkage,low porosity and low *** this study,porous Y 2Sio 5 ceramic with low sintering shrinkage and high porosity was successfully prepared by foam-gelcasting method using gelatin as the gelling *** effects of sintering methods,including in situ reaction sintering and direct sintering,and sintering temperatures on the phase com.osition,microstructure,shrinkage,porosity,and compressive strength of porous Y 2Sio 5were *** with samples fabricated by direct sintering,porous Y 2Sio 5 ceramic prepared via in situ reaction sintering method has the merits of the low linear shrinkage of 1.0%-4.7%,low bulk density of 0.79-0.88 g/cm^3,high porosity of 82.1%-80.1%,and high strength of 3.54-8.03 mPa,when the sintering temperatures increase from 1350 to 1550 ℃.Porous Y 2Sio 5 has unique multiple pore structures,especially containing the interconnected small pores in *** thermal conductivity of porous Y 2Sio 5 is very low,which is 0.228 W/（m·K） for the sample with a porosity of 79.6%.This work reports an optimal processing method of highly porous Y 2Sio 5 with the potential application as high-temperature thermal insulation material.

关键词： Porous Y 2Sio5 ceramic In situ synthesis mechanical property Thermal property

Anionic polymerization initiated by lithium amides for preparing high molecular weight polyacrylonitrile

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Chinese Chemical Letters 2019年第2期30卷 473-476页

作者： Xiaolin Shi jingyang Jiang State Key Laboratory of Fine Chemicals Faculty of Chemical Environmental and Biological Science and Technology Dalian University of Technology

Lithium amides have been proved to be effective anionic initiators for the anionic polymerization of acrylonitrile to get high molecular weight polyacrylonitrile in this study. Polyacrylonitrile with weightaverage molecular weight ranging from 1.02 × 10~6 g/mol to 1.23 ×10~6 g/mol (m_w/m_n= 1.9-2.2) could be prepared utilizing lithium amides derived from diisopropylamine, diethylamine, hexamethyldisilazane,dicyclohexylamine, and 2,2,6,6-tetramethylpiperidine as initiators. The polymerization of acrylonitrile proceeded in a homogeneous manner in N,N-di methyl for mamide and insignificant contribution of side reactions was confirmed.

关键词： Anionic polymerization Acrylonitrile High molecular weight polymer Lithium amides Polyacrylonitrile

最优尺度下新安江流域景观生态安全格局及其影响因素

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安徽农业大学学报（社会科学版） 2024年第2期33卷 112-123页

作者：於冉魏靖阳储昭君安徽农业大学国土资源研究所安徽合肥230036 安徽农业大学经济管理学院安徽合肥230036

新安江流域作为首个跨省生态补偿政策试点,其政策实施对于地区城市整体生态治理具有正向促进作用,分析新安江流域城市政策实施前、中、后期的景观生态风险时空演变趋势及驱动因素,可为该地区及同类区域生态治理及风险防范提供科学支撑... 详细信息

新安江流域作为首个跨省生态补偿政策试点,其政策实施对于地区城市整体生态治理具有正向促进作用,分析新安江流域城市政策实施前、中、后期的景观生态风险时空演变趋势及驱动因素,可为该地区及同类区域生态治理及风险防范提供科学支撑。基于2000、2010、2020年三期土地利用遥感数据,寻求评价景观生态风险的最优尺度,分析其时空演变趋势,并借助地理探测器计算空间因子的影响程度。研究表明:研究区最优研究尺度为粒度70 m、幅度11 km;2000—2020年,研究区景观生态风险显著降低,较高以上风险区面积大幅缩减,生态风险呈显著的空间正相关性,且相关程度不断减弱,高值聚集区逐渐减少;研究区内土地利用强度与坡度对景观生态风险驱动效应最强,各因子交互探测时可显著提高解释能力。研究区各市景观生态风险空间差异显著,需加强对草地、水域景观整体性的维护,进一步加强新安江流域城市生态稳定性,同时应考虑地区用地结构及风险状况,针对性采取风险治理措施。

关键词：尺度效应景观生态风险时空演变地理探测器新安江流域城市