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Flexoelectricity Driven Fano Resonance in Slotted Carbon Nanotubes for Decoupled Multifunctional Sensing

Research 2021年第2期2021卷 1158-1166页

作者： Jinlong Ren Yingchao Liu Xingqiang Shi Guangcun Shan Mingming tang Chaocheng Kaun Kunpeng Dou College of Information Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Optic-Electronic Information and Materials of Hebei Province Institute of Life Science and Green DevelopmentCollege of Physics Science and TechnologyHebei UniversityBaoding 071002China Institute of Precision Instrument and Quantum Sensing School of Instrumentation Science and Opto-Electronics EngineeringBeihang UniversityBeijing 100191China Institute of Experimental Physics Saarland University66123 SaarbrückenGermany School of Geosciences China University of PetroleumQingdao 266580China Research Center for Applied Sciences Academia SinicaTaipei 11529China

Multifunctionality,interference-free signal readout,and quantum effect are important considerations for flexible sensors equipped within a single unit towards further *** address these criteria,we present the slotted carbon nanotube(CNT)junction features tunable Fano resonance driven by flexoelectricity,which could serve as an ideal multimodal sensory *** on extensive ab initio calculations,we find that the effective Fano factor can be used as a temperature-insensitive extrinsic variable for sensing the bending strain,and the Seebeck coefficient can be used as a strain-insensitive intrinsic variable for detecting ***,this dual-parameter permits simultaneous sensing of temperature and strain without signal *** further demonstrate the applicability of this slotted junction to ultrasensitive chemical sensing which enables precise determination of donor-type,acceptor-type,and inert *** is due to the enhancement or counterbalance between flexoelectric and chemical *** gating would preserve the electron–hole symmetry of the slotted junction whereas chemical gating would break *** a proof-of-concept demonstration,the slotted CNT junction provides an excellent quantum platform for the development of multistimuli sensation in artificial intelligence at the molecular scale.

关键词： Flex equipped precise

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An economic tie network-structure analysis of urban agglomeration in the middle reaches of Changjiang River based on SNA

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Journal of Geographical Sciences 2015年第6期25卷 739-755页

作者： SUN Qian tang Fanghua tang Yong School of Business Central South University Changsha 410086 China School of Business Hunan City University Yiyang 413000 Hunan China School of Architecture and City Planning Hunan City University Yiyang 413000 Hunan China School of Urban Management Hunan City University Yiyang 413000 Hunan China

Due to its great strategic significance in integrating regional coordinated development and enhancing the rise of Central China, urban agglomeration in the middle reaches of Changjiang （Yangtze） River has attracted much attention from both theoretical and practical aspects. Such research into the area＇s economic network structure is beneficial for the formation of an urban- and regional-development strategy. This paper constructs an economic tie model based on a modified gravitation model. Subsequently, referring to social network analysis, the paper empirically studies the network density, network centrality, subgroups and structural holes of the middle reaches of Changjiang River＇s urban agglomeration economic network. The findings are fourfold：（1） an economic network of urban agglomeration in the middle reaches of Changjiang River has been formed, and economic ties between the cities in this network are comparatively dense; （2） the urban agglomeration in the middle reaches of Changjiang River can be divided into four significant subgroups, with each subgroup having its own obvious economic communications, while there is less economic-behavioral heterogeneity among subgroups - this is especially true for the two subgroups that exist in the Poyang Lake Ecological Economic Zone; （3） an economy pattern driven by the central cities of Wuhan, Changsha and Nanchang has emerged in the urban agglomeration of the middle reaches of Changjiang River, while these three capital cities have exerted great radiation abilities to their surrounding cities, the latter are less able to absorb resources from the former （4） the Wuhan Metropolitan Areas and the Poyang Lake Ecological Economic Zone have more structural holes than the Ring of Changsha, Zhuzhou and the Xiangtan City Clusters, meaning that cities at the periphery of these two areas are easily constrained by central cities. The Ring of Changsha, Zhuzhou and the Xiangtan City Clusters have fewer structural holes; thus, the c

关键词： urban agglomeration the middle reaches of Changjiang River economic network gravitation model social network analysis

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Investigation of the decline of Ulva prolifera in the Subei Shoal and Qingdao based on physiological changes

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Journal of Oceanology and Limnology 2021年第3期39卷 918-927页

作者： Ya HAO Chen GUAN Xinyu ZHAO Tongfei QU Xuexi tang Ying WANG College of Marine Life Sciences Ocean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

It has been a scientific consensus that Ulva prolifera green tide that break out annually between May and August in the recent decade off eastern coast of Yellow *** investigate the ecological mechanism of the decline of *** green tide,we compared the physiological characteristics of *** samples collected in three stages of the green tide in Subei Shoal north Jiangsu,the initiation point,on May 10(early,the initiation),July 10(middle,the outbreak),and in Taipingjiao,Qingdao on August 10(late,the decline).Compared to the early samples,the middle,and late samples showed a lower chlorophyll content and photosynthetic e fficiency at a higher lipid peroxidation *** middle and later samples had fewer chloroplasts in the cells of *** than those in the early *** addition,the cells of *** sampled in the late stage showed ruptured and deformed cell *** in physiological function were reflected in the growth *** the middle and late *** samples presented negative growth *** analysis results show that the rising temperature was mainly responsible for the local decline of *** green *** high light-intensity that could induce the photoinhibition was also an important factor for the ***,*** population that remained in the Subei Shoal and those that northward drifted to Qingdao experienced the same decline processes:rising temperature and continuous high light conditions in the late phase of green tide reduced the photosynthetic capacity and destroyed the antioxidant system of the thallus,which lead to decrease of *** only difference is that the temperature in the Subei Shoal rose earlier than that in Qingdao;thus,*** remaining in the Subei Shoal went disappeared first.

关键词： Ulva prolifera green tide decline process photoinhibition lipid peroxidation

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The dielectric behavior and efficient microwave absorption of doped nanoscale LaMnO_(3)at elevated temperature

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Nano Research 2022年第8期15卷 7731-7741页

作者： Zhigang Mu Guoke Wei Hang Zhang Lu Gao Yue Zhao Shaolong tang Guangbin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology InstituteBeijing 100024China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China

LaMnO_(3)perovskite has great potential in microwave absorption at high temperature due to its complex doping effect and super *** current research mainly focuses on the doping ratio regulation,while the mechanism of doping effect at high temperature is still lack of sufficient *** this work,La1−xSrxMn1−yFeyO_(3)(LaMnO_(3),La_(0.7)Sr_(0.3)MnO_(3),and La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3))nanostructures with different doping sites were successfully prepared by the solid phase reaction ***,the high temperature dielectric test samples were obtained by mixing with cordierite(2MgO·2Al_(2)O_(3)·5SiO_(2)(MAS)).The results showed that the temperature dependence of Mn ion spin state had a significant impact on the high temperature dielectric behavior of La_(1−x)Sr_(x)Mn_(1−y)FeyO_(3).Particularly,when the thickness is only 1.9 mm,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS can achieve the widest bandwidth of 4.2 GHz covered the entire X-band(8.2–12.4 GHz)and a minimum reflection loss(RL)value of−17.99 dB at 500℃.In order to improve the operating temperature of La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS,a cellular array structure was designed by using computer simulation technology(CST)software to introduce magnetic *** the outer length of the hexagon is 1 mm and the coating thickness is 1.9 mm,the widest bandwidth covers the X-band and the minimum RL value is−15.35 dB at 800℃.Therefore,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)has a great prospect as an efficient high temperature microwave absorber.

关键词： microwave absorption doping perovskite high temperature dielectric behavior

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Micro powder injection molding of boron carbide components with SiC-Al_(2)O_(3)-Y_(2)O_(3)sintering additives

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Chinese Journal of Aeronautics 2022年第5期35卷 429-440页

作者： Changrui WANG Zhiyou LI Wei TIAN Yuxian LI Lina tang Qilong PANG Minghe CHEN National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Ji’nan Technician College Jinan 250000China Shanghai Aerospace Equipments Manufacturer Co.Ltd. Shanghai 200245China College of Mechanical and Electrical Engineering Nanjing Forestry UniversityNanjing 210037China

Sintering additives and micro-powder injection molding offer an effective method to densify boron carbide(B_(4)C)and make B_(4)C components with complex *** adjusting the proportion of three kinds of powders(SiC,Al_(2)O_(3)and Y_(2)O_(3)),four kinds of sintering additives were *** feedstock uniformity,debinding behavior,phase composition and microstructure of micro injection molded B_(4)C components with different sintering additives were *** results showed that the defects such as lattice distortion and vacancy were introduced into ball milling,which increase the surface energy and benefit subsequent sintering *** feedstock had good uniformity and rheology that met the requirements of micro powder injection *** debinding,B_(4)C components had enough strength and showed certain sintering *** addition of sintering additives was beneficial to densification and sintering temperature *** addition of sintering additives formed a second phase in the B_(4)C crystal and at the grain boundary of B_(4)C crystal,which changed the fracture mode from transgranular fracture to mixed fracture mechanism with transgranular fracture.

关键词： Composite materials Fracture Injection molding Microstructure Phase composition

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An Incentive Mechanism for Federated Learning:A Continuous Zero-Determinant Strategy Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 88-102页

作者： Changbing tang Baosen Yang Xiaodong Xie Guanrong Chen Mohammed A.A.Al-qaness Yang Liu IEEE the College of Physics and Electronic Information Engineering Zhejiang Normal UniversityUniversityJinhua 321004China the School of Mathematical Sciences Zhejiang Normal UniversityJinhua 321004China the Department of Electrical Engineering City University of Hong KongHong KongChina Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province Jinhua 321004China

As a representative emerging machine learning technique, federated learning(FL) has gained considerable popularity for its special feature of “making data available but not visible”. However, potential problems remain, including privacy breaches, imbalances in payment, and inequitable *** shortcomings let devices reluctantly contribute relevant data to, or even refuse to participate in FL. Therefore, in the application of FL, an important but also challenging issue is to motivate as many participants as possible to provide high-quality data to FL. In this paper, we propose an incentive mechanism for FL based on the continuous zero-determinant(CZD) strategies from the perspective of game theory. We first model the interaction between the server and the devices during the FL process as a continuous iterative game. We then apply the CZD strategies for two players and then multiple players to optimize the social welfare of FL, for which we prove that the server can keep social welfare at a high and stable level. Subsequently, we design an incentive mechanism based on the CZD strategies to attract devices to contribute all of their high-accuracy data to ***, we perform simulations to demonstrate that our proposed CZD-based incentive mechanism can indeed generate high and stable social welfare in FL.

关键词： Federated learning(FL) game theory incentive mechanism machine learning zero-determinant strategy

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Fluid-driven artificialmuscles: bio-design, manufacturing, sensing, control, and applications

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Bio-Design and Manufacturing 2021年第1期4卷 123-145页

作者： Chao Zhang Pingan Zhu Yangqiao Lin Wei tang Zhongdong Jiao Huayong Yang Jun Zou State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Ningbo Research Institute Zhejiang UniversityNingbo 315100China

Developing artificial muscles that can replace biological muscles to accomplish various tasks iswhat we have long been aiming *** advances in flexible materials and 3D printing technology greatly promote the development of artificial muscle technology.A variety of flexible material-based artificial muscles that are driven by different external stimuli,including pressure,voltage,light,magnetism,temperature,etc.,have been *** these,fluid-driven artificial muscles(FAMs),which can convert the power of fluid(gas or liquid)into the force output and displacement of flexible materials,are the most widely used actuation methods for industrial robots,medical instruments,and human-assisted devices due to their simplicity,excellent safety,large actuation force,high energy efficiency,and low ***,the bio-design,manufacturing,sensing,control,and applications of FAMs are introduced,including conventional pneumatic/hydraulic artificial muscles and several innovative artificial muscles driven by functional ***’s more,the challenges and future directions of FAMs are discussed.

关键词： Artificial muscles Fluid Bio-design Manufacturing Sensoring Control

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Source apportionment of PM_(2.5)and visibility in Jinan,China

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Journal of Environmental Sciences 2021年第4期33卷 207-215页

作者： Mengtian Cheng Guiqian tang Bo Lv Xingru Li Xinrui Wu Yiming Wang Yuesi Wang Key Laboratory for Semi-Arid Climate Change of Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Jinan Ecological and Environment Monitoring Center of Shandong Province Jinan 250000China Capital Normal University Beijing 100048China

Atmospheric extinction is impacted by the chemical composition of *** better understand the chemical composition of PM_(2.5)(particles with diameters of less than 2.5μm)and its relationship with extinction,one-month sampling campaigns were carried out in four different seasons from 2013 to 2014 in Jinan,*** seasonal average concentrations of PM_(2.5)were 120.9(autumn),156.6(winter),102.5(spring),and 111.8μg/m^(3)(summer).The reconstructed PM_(2.5)chemical composition showed that sulfate,nitrate,chlorine salt,organic matter(OM),mineral dust,elemental carbon(EC)and others accounted for 25%,14%,2%,24%,22%,3%and 10%,*** relationship between the chemical composition of PM_(2.5)and visibility was reconstructed by the IMPROVE method,and ammonium sulfate,ammonium nitrate,OM and EC dominated the *** main sources were resolved for PM_(2.5),including secondary particles,coal combustion,biomass burning,industry,motor vehicle exhaust,soil dust and cooking,which accounted for 37%,21%,13%,13%,12%,3%and 1%,*** contributions of different sources to visibility were similar to those to PM_(2.5).With increasing severity of air pollution,the contributions of secondary particles and coal combustion increased,while the contribution of motor vehicle exhaust *** results showed that coal combustion and biomass burning were still the main sources of air pollution in Jinan.

关键词： PM_(2.5) Jinan Source apportionment Extinction

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In-situ growth of large-area monolithic Fe_(2)O_(3)/TiO_(2) catalysts on flexible Ti mesh for CO oxidation

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Journal of Materials Science & Technology 2021年第10期69卷 119-128页

作者： Xinyue tang Junchao Wang Jing Li Xinglai Zhang Peiqing La Xin jiang Baodan Liu Shenyang National Laboratory for Materials Science(SYNL) Institute o f Metal Research(IMR)Chinese Academy of Sciences(CAS)No.72 Wenhua RoadShenyang110016 China School of Materials Science and Engineering University of Science and Technology of ChinaNo.72 Wenhua Road.Shenyang110016 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou730050China

In this study, we reported the in-situ fabrication of a series of Fe_(2)O_(3)/TiO_(2) monolithic catalysts on flexible Ti mesh via plasma electrolytic oxidation process, hydrothermal reaction and chemical bath deposition(CBD) method. The morphology tailoring of Fe_(2)O_(3) nanostructures finds that Fe2O3 nanosheets supported on TiO2 exhibit superior catalytic performance with a complete oxidation of CO at 260℃. The catalytic stability test indicates that the in-situ grown Fe_(2)O_(3)/TiO_(2) catalysts own outstanding performance for continuous CO oxidation due to the strong substrate adhesion without mass loss. The microstructures and interfaces of Fe_(2)O_(3)/TiO_(2) catalysts are well studied using series of characterization techniques. The in-situ preparation strategy of metal oxide catalysts in this work will open up more opportunities for the rational design of variety of monolithic catalysts used for CO oxidation, de-NO_(x), three-way catalysis and other related application in industry.

关键词： Fe_(2)O_(3)/TiO_(2)nanostructures Monolithic catalysts Plasma electrolytic oxidation In-situ fabrication CO oxidation

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A benzothiazole-based ratiometric fluorescent probe with large Stokes shifts for quantitative profiling of sulfite in real samples and living cells

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Green Chemical Engineering 2023年第4期4卷 427-432页

作者： Fengpei Qi Xiuxiu Yue Yitong Yang Qin Liang Ruiren tang Xiangzhi Song College of Chemistry&Chemical Engineering Central South UniversityChangsha410083China College of Materials&Chemical Engineering Hunan City UniversityYiyang413000China

Rapid,selective,and quantitative profiling of SO_(3)^(2-)is a prerequisite for investigating its effect on different physiopathological *** address this challenge,our team prepared a ratiometric fluorescent probe HBTCS,based on 4-(benzothiazol-2-yl)-3-hydroxybenzaldehyde for specific detection of SO_(3)^(2-)under a singlewavelength *** solution of probe HBTC-S itself exhibited orange fluorescence(λ_(em)=614 nm),and became green fluorescent(λ_(em)=471 nm)after the addition of SO_(3)^(2-).The vitro experiments suggested that the probe displayed high sensitivity,excellent selectivity,and a low detection limit(0.15μM).Moreover,probe HBTC-S was successfully applied for qualitative and quantitative monitoring of SO_(3)^(2-)in realistic samples and living HeLa cells in a ratiometric manner.

关键词： Ratiometric Fluorescent probe Sulfite(SO_(3)^(2-)) Single-wavelength excitation Living imaging

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