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The Enhancement of Selectivity and Activity for Two-Electron Oxygen Reduction Reaction by Tuned Oxygen Defects on Amorphous Hydroxide Catalysts

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CCS Chemistry 2022年第2期4卷 566-583页

作者： junheng Huang Changle Fu junxiang Chen Nangan senthilkumar Xinxin Peng Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002 University of the Chinese Academy of Science Beijing 100049

Amorphous catalysts,thanks to their uniquely coordinated unsaturated properties and abundance of defect sites,tend to possess higher activity and selectivity than their crystalline *** this work,we report a facile and general solventcontrolled precipitation method to prepare hybrids of graphene oxide(GO)supporting amorphous metal hydroxide[A-M(OH)_(x)/GO,M=Cu,Co,and Mn],which provides us with tangible materials to study the structure–performance relationship of various amorphous *** systematic investigation of A-Cu(OH)_(2)/GO by coupling ex situ/in situ characteristic techniques with electrochemical studies reveals that electrocatalytic activity and selectivity toward a two-electron oxygen reduction reaction(ORR)is highly dependent on the coordinated Cu catalytic sites and the disordered structure of A-Cu(OH)_(2).In situ X-ray absorption near-edge structure(XANES)and density functional theory(DFT)calculation verify that the degree of OH*poisoning(ΔG0 OH*)tuned by three-OH-coordinated Cu sites in amorphous structures plays a crucial role in selective catalysis of ORR for H_(2)O_(2) *** optimized A-Cu(OH)_(2)/GO shows superior activity and high selectivity(~95%)toward H_(2)O_(2),as demonstrated by a zinc–air battery capable of on-site H_(2)O_(2) production with a rate as high as 3401.5 mmol h^(−1) g^(−1).

关键词： amorphous hydroxide general preparation two-electron ORR on-site H_(2)O_(2)production three-OH-coordinated Cu sites

RFHUI:an RFID based human-unmanned aerial vehicle interaction system in an indoor environment

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Digital Communications and Networks 2020年第1期6卷 14-22页

作者： jian Zhang Zhitao Yu Xiangyu Wang Yibo Lv Shiwen Mao senthilkumar CG.Periaswamy justin Patton Xuyu Wang Auburn University RFID Lab AuburnAL36849USA Department of Electrical and Computer Engineering Auburn UniversityAuburnAL36849USA Department of Computer Science California State UniversitySacramentoCA95819-6021USA

In this paper,we present an RFID based human and Unmanned Aerial Vehicle(UAV)Interaction system,termed RFHUI,to provide an intuitive and easy-to-operate method to navigate a UAV in an indoor *** relies on the passive Radio-Frequency IDentification(RFID)technology to precisely track the pose of a handheld controller,and then transfer the pose information to navigate the UAV.A prototype of the handheld controller is created by attaching three or more Ultra High Frequency(UHF)RFID tags to a board.A Commercial Off-The-Shelf(COTS)RFID reader with multiple antennas is deployed to collect the observations of the ***,the precise positions of all the tags can be obtained by our proposed method,which leverages a Bayesian filter and Channel State Information(CSI)phase measurements collected from the RFID ***,we introduce a Singular Value Decomposition(SVD)based approach to obtain a 6-DoF(Degrees of Freedom)pose of the controller from estimated positions of the ***,the pose of the controller can be precisely tracked in a real-time manner,while the user moves the ***,control commands will be generated from the controller's pose and sent to the UAV for *** performance of the RFHUI is evaluated by several *** results show that it provides precise poses with 0.045m mean error in position and 2.5∘mean error in orientation for the controller,and enables the controller to precisely and intuitively navigate the UAV in an indoor environment.

关键词： Radio-Frequency Identification(RFID) Human Computer Interaction(HCI) Unmanned Aerial Vehicle(UAV) Singular Value Decomposition(SVD) Localization Navigation

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广东大宝山复合污染土壤的改良及植物复垦

中国环境科学 2008年第9期28卷 775-780页

作者：邹晓锦仇荣亮黄穗虹田甜 P.senthilkumar 中山大学环境科学与工程学院广东省环境污染控制与修复技术重点实验室广东广州510275

选取广东省大宝山农耕废弃污染土壤及尾矿坝土壤,采用豌豆盆栽实验,研究了施用石灰石、沸石、粉煤灰对豌豆生物量、豌豆植株内Cd、Cu、Pb和Zn含量、土壤中各重金属的有效态及土壤pH值的影响.结果表明,对于农耕废弃污染土壤,3种改良剂均... 详细信息

选取广东省大宝山农耕废弃污染土壤及尾矿坝土壤,采用豌豆盆栽实验,研究了施用石灰石、沸石、粉煤灰对豌豆生物量、豌豆植株内Cd、Cu、Pb和Zn含量、土壤中各重金属的有效态及土壤pH值的影响.结果表明,对于农耕废弃污染土壤,3种改良剂均能显著提高豌豆的生物量,经改良处理后,豌豆生物量为对照的2.4-2.9倍.对于尾矿坝土壤,未改良处理时豌豆不能发芽;沸石处理时豌豆发芽后1周后萎蔫死亡;石灰石和粉煤灰有一定的改良效果.改良处理能明显降低豌豆对Cd、Cu、Zn和Pb的吸收.粉煤灰与石灰石混剂处理对豌豆重金属吸收降低效果最显著,Cd、Cu、Pb和Zn降低率分别为94.6%,69.3%,80.6%,87.3%,混剂处理优于单剂处理.豌豆重金属含量与土壤中重金属有效态含量呈极显著相关,改良剂促进植株生长的主要原因可能是提高了土壤pH值并释放出植物营养元素（K、Ca和Mg等）,从而改善了土壤理化性质,同时降低了复合污染土壤重金属的生物有效性.

关键词：重金属石灰石沸石粉煤灰豌豆

Dielectric dispersion and thermodynamic behavior of stearic acid binary mixtures with alcohol as co-solvent using time domain reflectometry

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journal of Advanced Dielectrics 2017年第4期7卷 34-40页

作者： M.Maria Sylvester T.Ganesh D.j.S.Anand Karunakaran P.senthilkumar Praveen G.Hudge A.C.Kumbharkhane PG&Research Department of Physics Bishop Heber CollegeBharthidasan University Tiruchirapalli 620017Tamil NaduIndia PG&Research Department of Physics Rajah Serfoji Government College Bharthidasan University Thanjavur 613005Tamil NaduIndia Department of Physics Saranathan College of Engineering Tiruchirapalli 620012Tamil NaduIndia Department of Physics S.I.C.E.Society's Degree College of Arts Science and CommerceAmbernathThaneMaharashtraIndia School of Physical Sciences Swami Ramanad Teerth Marthwada University NandedMaharashtraIndia

Dielectric permittivity and relaxation dynamics of binary and ternary mixture of stearic acid on various concentration and their thermodynamic effects are *** static dielectric constant(ε_(0)),dielectric permittivity(ε′)and dielectric loss(ε″)are found by bilinear *** relaxation time(τ),dielectric strength(Δε)and the excess permittivity(ε^(E))are *** thermodynamic parameters such as enthalpy(ΔH),entropy(ΔS)and Gibb's free energy(ΔG)are *** significant changes in dielectric parameters are due to the intramolecular and intermolecular interactions in response to the applied *** permittivity spectra of stearic acid–alcohol in the frequency range of 10MHz to 30 GHz have been measured using picoseconds Time Domain Reflectometry(TDR).The dielectric parameters(ε_(0),ε′,ε″)are found by bilinear calibration *** of temperature in intermolecular interaction and the relaxation process are also *** FT-IR spectral analysis reveals that the conformation of functional groups and formation for hydrogen bonding are present in both binary and ternary mixtures of stearic acid.

关键词： TDR dielectric relaxation stearic acid thermodynamic parameters FT-IR

Breeding Resilience:Exploring Lodging Resistance Mechanisms in Rice

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Rice science 2024年第6期31卷 659-672页

作者： Durga Prasad MULLANGIE Kalaimagal THIYAGARAjAN Manonmani SWAMINATHAN jagadeesan RAMALINGAM Sritharan NATARAjAN senthilkumar GOVINDAN Department of Genetics and Plant Breeding Centre for Plant Breeding and GeneticsTamil Nadu Agricultural UniversityCoimbatore 641003India Department of Rice Centre for Plant Breeding and GeneticsTamil Nadu Agricultural UniversityCoimbatore 641003India Centre for Molecular Biology and Biotechnology Tamil Nadu Agricultural UniversityCoimbatore 641003India

Lodging is more than just plants falling over;it incurs significant economic losses for farmers leading to a decrease in both yield and quality of the final *** management practices,such as dense sowing,excessive nitrogen fertilizer applications,inappropriate sowing dates,and upland rice cultivation,exacerbate the risk of lodging in *** breeders have developed high-yielding rice varieties utilizing the sd1 gene,relying solely on this gene is insufficient to enhance lodging *** the traits that contribute to lodging resistance is *** factors include biochemical,anatomical,and morphological traits,such as the levels of lignin,cellulose,hemicellulose,silicon,and potassium,along with the number and area of vascular bundles and the thickness,diameter,and length of the ***,markers associated with lodging-related genes,like SCM2,SCM3,SCM4,and prl4,can be utilized effectively in marker-assisted backcrossing to develop rice varieties with desirable culm *** literature review aims to aid rice breeders in addressing the issue of lodging by examining traits that influence lodging resistance,developing phenotyping strategies for these traits,identifying suitable instrumentation,exploring methods for screening lodging-resistant plants,understanding the mathematical relationships involved,and considering molecular breeding aspects for pyramiding genes related to lodging.

关键词： rice lodging resistance breaking and bending type lodging culm strength SCM gene prl gene lignin cellulose

Photoelectrochemical study of MoO_3 assorted morphology films formed by thermal evaporation

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journal of Energy Chemistry 2016年第5期25卷 798-804页

作者： R.senthilkumar G.Anandhababu T.Mahalingam G.Ravi Department of Physics Alagappa University Department of Electrical and Computer Engineering Ajou University

Molybdenum oxide nanostructured thin films were grown on fluorine doped tin oxide（FTO）, indium doped tin oxide（ITO） and ordinary glass substrates by thermal evaporation process without vacuum and catalysts using molybdenum trioxide（MoO） powder as a source material and oxygen as a carrier *** morphologies including nanobelts, disks and hexagonal rod-like nanostructures were obtained by changing the source and substrate temperatures during the growth of MoOthin films. Structural parameters, morphology, composition and surface features of the films were characterized by XRD, SEM, EDAX,XPS, AFM and Raman spectroscopy. The films were orthorhombic in structure with preferred orientation along（0 1 0） plane. Morphology analysis reveals randomly aligned nanobelts with 40 nm in thickness and a width of 800 nm and 3–12 mm in length. The disks have 1.5 μm diameters, 1 μm thickness and hexagonal rod-like nanostructures with a length, breath and width of 2 μm, 1 μm and 100 nm are formed. The samples were investigated under dark and photocurrent conditions in HSOaqueous solution as a function of applied potential. The photocurrent density of samples prepared on ITO and FTO substrate samples were compared and the results are discussed.

关键词： Molybdenum oxide Thermal evaporation Nanostructure Photoelectrochemical cell

Key role of time delay and connection topology in shaping the dynamics of noisy genetic regulatory network

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Key role of time delay and connection topology in shaping th...

Effect of temperature and strain rate on compressive response of extruded magnesium nano-composite

The5th全国动力学与控制青年学者研讨会

作者：杨晓丽 D.V.senthilkumar j.Kurths College of Mathematics and Information Science Shaanxi Normal University Potsdam Institute for Climate Impact Research Potsdam Institute for Climate Impact Research 14473 PotsdamGermany Department of Applied Mathematics Northwestern Polytechnical University Institute of Physics Humboldt University

The present work focuses on a paced genetic regulatory small-world network with time-delayed *** the dynamical behaviors including temporal resonance and spatial synchronization are evolved under the influence of time delay and connection topology are *** numerical simulations some interesting results are *** stochastic resonance together with delay-induced resonance is firstly *** the diverse role on resonance properties played by time delay and

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journal of Magnesium and Alloys 2015年第3期3卷 224-230页

作者： B.Selvam P.Marimuthu R.Narayanasamy V.senthilkumar K.S.Tun M.Gupta Department of Mechanical Engineering Mookambigai College of EngineeringPudukkottaiTamilnadu 622502India Syed Ammal Engineering College RamanathapuramTamilnadu 623502India Department of Production Engineering National Institute of TechnologyTiruchirappalliTamilnadu 620015India Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117576Singapore

The hot deformation behaviour of extruded magnesium-zinc oxide nano composite has been studied using hot compression *** test was conducted in the temperature range of 250-400℃ and in the strain rate range of 0.01 to 1.5 s^(−1).The processing map was obtained using the power dissipation efficiency with the functions of temperature and strain *** workability and instability domains were observed in the processing map for a nano *** optical microscopy(OM),scanning electron microscopy(SEM)and transmission electron microscopy(TEM)images were used to confirm the formation of dynamic recrystallization(DRX),dynamic recovery(DRY)and instability *** workability region of the composite was identified at a working temperature of 400℃ and the strain rate of 0.01 s^(−1) from the processing *** instability regions were observed at higher strain rates(>0.1 s^(−1))and temperatures(250-400℃).

关键词： Metal matrix composites Powder metallurgy Processing map Strain rate Instability Nano-composite

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大宝山矿周边污染土壤重金属生物有效性评估

中山大学学报（自然科学版） 2009年第4期48卷 125-129,136页

作者：黄穗虹田甜邹晓锦周小勇 PALANINAICKER senthilkumar 仇荣亮中山大学环境科学与工程学院广东广州510275 广东省环境污染控制与修复技术重点实验室广东广州510275

分析了6种单一提取剂HCl、DTPA、CaCl2、NH4NO3、MgCl2、去离子水对大宝山矿周边上坝村受污染菜地(生菜、芥菜、蕹菜)土壤中Pb、Zn、Cu和Cd生物可利用性的指示能力。结果表明:3种菜地的HCl、DTPA提取态的Pb,CaCl2、NH4NO3和MgCl2提取态... 详细信息

分析了6种单一提取剂HCl、DTPA、CaCl2、NH4NO3、MgCl2、去离子水对大宝山矿周边上坝村受污染菜地(生菜、芥菜、蕹菜)土壤中Pb、Zn、Cu和Cd生物可利用性的指示能力。结果表明:3种菜地的HCl、DTPA提取态的Pb,CaCl2、NH4NO3和MgCl2提取态的Zn,CaCl2提取态的Cd可以比较好地反映金属的生物有效性;而3种蔬菜中的Cu与土壤6种提取态的Cu均没有显著的相关性。土壤样品中铁锰氧化物对Pb、Zn、Cu和Cd的固定作用直接影响该4种重金属的析出,并且Cu、Cd和Pb所受的影响要强于Zn。结果还表明,与地上部分相比蔬菜地下部分的重金属含量能更准确地反映重金属从土壤向植物中的转移。

关键词：重金属生物有效性提取剂大宝山