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International Conference on Newer trends and Innovations in Mechanical engineering, ICONTIME 2020

作者： Abinaya Ishwarya, G.K. Rajkumar, D. Civil Engineering Vels Institute of Science Technology and Advanced Studies Chennai Tamilnadu India Vels Institute of Science Technology and Advanced Studies Chennai Tamilnadu India

The study on ergonomics makes the engineer or the managing person to arrange the machineries, tools, skilled labours and their environment to be in order and conventional to complete the task in an effective manner. To intensify the success rate by executing Ergonomics, there should be a need for good communication between the managing level and workers level. In the construction field, even though with safety precautions, still workers face stress due to health issues and mental issues. In this paper, the risk factors that govern the gap between top and bottom level in various psychological and administrative factors, analysis of ergonomics measurement in context with questionnaire survey conducted in five construction sites, the remedial measures and challenges in implementing ergonomics were discussed. The proper implementation of ergonomics is ingrained through the flowchart for both administration and workers which has been recommended to the construction field. © 2020 Elsevier Ltd. All rights reserved.

关键词： Ergonomics

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Characteristics and Analysis of ElectroGastroGram Signal 1st

Characteristics and Analysis of ElectroGastroGram Signal

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1st EAI International Conference on Intelligent Systems and Machine Learning, ICISML 2022

作者： Chandrasekaran, R. Vijayaraj, S. Lakshmi, G. R. Jothi Department of Electrical Engineering Vels Institute of Science Technology and Advanced Studies Chennai India Department of Electronics and Communication Engineering Vels Institute of Science Technology and Advanced Studies Chennai India

ISBN: (纸本)9783031350771

In this study the various spectral estimation of the Electrogastrogram Signals are discussed. The Main objective of the study is to identify the gastroparesis condition using various signal processing techniques. Gastroparesis is one of the pathetic condition in which the stomach fails to digest. Gastroparesis is also called as stomach paralysis. Due to damage or dysfunction of vagal nerve, kajal cells at stomach lining temporary stomach paralysis happen. The immediate stimulation can make the pacemaker of the stomach to get activated and back to digestion process. In this study the stomach signals are preprocessed and spectral estimation techniques are applied to study about the signal spectrum characteristics. The determination of dominant frequencies and features extracted from frequency domain gives vivid description about the abnormalities of the gastric signal. © 2023, ICST institute for Computer Sciences, Social Informatics and Telecommunications engineering.

关键词： Spectrum analysis

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Corrigendum to “Designing an innovative 2D/2D step scheme α-Fe 2 O 3 /BiOBr/MoS 2 ternary integrated heterojunction with unparalleled visible-light-induced remarkable photocatalytic H 2 evolution” [Int. J. 99 (2025) 112–122]

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International Journal of Hydrogen Energy 2025年 128卷 171-173页

作者： Rabia Nawaz Muhammad Saad Ali Bahadur Shahid Iqbal Sajid Mahmood Ammar Zidan Muhammad Shuaib Khan Rabia Liaquat Manzar Sohail Mohammed T. Alotaibi Department of Chemistry School of Natural Sciences (SNS) National University of Science and Technology (NUST) H-12 Islamabad 46000 Pakistan Centre for Organic and Nanohybrid Electronics Silesian University of Technology Konarskiego 22B 44-100 Gliwice Poland Joint Doctoral School Silesian University of Technology Akademicka 2A 44-100 Gliwice Poland Nanomaterials Research Center Department of Chemistry College of Science Mathematics and Technology Wenzhou-Kean University Wenzhou 325060 Zhejiang Province China Dorothy and George Hennings College of Science Mathematics and Technology Kean University 1000 Morris Ave Union NJ 07083 USA Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo China Ningbo 315100 China Functional Materials Group Gulf University for Science and Technology Mishref 32093 Kuwait Biomedical Engineering Department College of Engineering and Technologies Al-Mustaqbal University 51001 Babylon Iraq National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Henan University Kaifeng 475004 China Energy Systems Engineering Department U.S-Pakistan Center for Advanced Studies in Energy (USPCAS-E) National University of Sciences and Technology (NUST) Islamabad 44000 Pakistan Department of Chemistry Turabah University College Taif University P.O. Box 11099 Taif 21944 Saudi Arabia

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Dual topology and versatile Rashba-split surface state configurations in 2M−WS2 and 2M−WSe2

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Physical Review B 2025年第11期111卷 115151-115151页

作者： Lixuan Xu Yuqiang Fang Fuqiang Huang Shihao Zhang Shiheng Liang Yulin Chen Lexian Yang Zhongkai Liu Nan Xu Department of Physics Hubei University Wuhan 430062 China Key Laboratory of Intelligent Sensing System and Security (Hubei University) Ministry of Education Wuhan 430062 China School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Physics and Electronics Hunan University Changsha 410082 China School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China ShanghaiTech Laboratory for Topological Physics Shanghai 201210 China Department of Physics University of Oxford Oxford OX1 3PU United Kingdom State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 China Institute for Advanced Studies (IAS) Wuhan University Wuhan 430072 China Wuhan Institute of Quantum Technology Wuhan 430206 China

The 2M-phase transition metal dichalcogenides have recently attracted intensive research interest due to their rich topological and superconducting phase diagrams. Apart from the topological surface states of 2M−WS2 near Γ that originated from the strong topological order, using angle-resolved photoemission spectroscopy, we discover additional Rashba-split states on the surfaces of both 2M−WS2 and 2M−WSe2, which extend in large momentum-energy regions. First-principles calculations well reproduce these states and attribute them to the weak topological orders. The calculations further indicate that the surface state connecting configurations are tunable under moderate pressure, suggesting that 2M−WS2 and WSe2 are promising platforms to study topological phase transition and explore topological superconductivity.

关键词： Photoacoustic spectroscopy

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Construction of chiral through-space luminophores via symmetry breaking triggered by sequenced chlorination

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Science China Chemistry 2023年第7期66卷 2083-2090页

作者： Yufeng Xie Huaying Liu Zhongliang Li Xin Zhang Lijuan Song Kang Zhou Feng Yuan Hengzhi You Engui Zhao Zikai He School of Science Harbin Institute of TechnologyShenzhen 518055China School of Chemical Engineering and Technology Harbin Institute of Technology HarbinHarbin 150001China Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Shenzhen Bay Laboratory Shenzhen 518055China Hoffmann Institute of Advanced Materials Shenzhen PolytechnicShenzhen 518055China

The construction of molecular chirality is crucial for exploring novel luminophores with chiroptical *** asymmetric synthesis of chiral center or axial is not powerful enough on through-space *** methodologies for breaking molecular symmetry could be promising but remain less ***,we report a novel methodology for constructing chiral through-space luminophores via simple chlorination on bridged carbazole *** chlorination breaks the molecular symmetry and thus results in molecular chirality by eliminating the mirror plane or rotating ***,continuous multiple chlorinations can rebuild and break the symmetry of the skeleton in *** chiral and achiral isomeric analogues are synthesized and characterized with impressive chiroptical *** of chiral high performance liquid chromatography(HPLC),single-crystal X-ray diffraction,kinetic racemization,and chiroptical property investigation demonstrate the effectiveness of our rational design *** provides a feasible methodology for exploring novel chiral luminescent materials based on versatile though-space skeletons.

关键词： symmetry breaking chiral through-space luminophore circularly-polarized luminescence kinetic racemization

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An improved equilibrium optimiser-based algorithm for dynamic network reconfiguration and renewable DG allocation under time-varying load and generation

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International Journal of Ambient Energy 2023年第1期44卷 280-304页

作者： Raut, Usharani Mishra, Sivkumar Department of Electrical Engineering International Institute of Information Technology Bhubaneswar India Department of Electrical Engineering Centre for Advanced Post Graduate Studies Biju Pattnaik University of Technology Rourkela India

This paper presents an improved equilibrium optimiser (IEO)-based method for dynamic hourly network reconfiguration (NR) with optimal allocation of dispatchable and non-dispatchable renewable distributed generator (DG) units in radial power distribution networks. In this work, solar- and wind-based DGs are considered non-dispatchable DG, while biomass DGs are considered dispatchable DG. The output of biomass DGs is adjusted according to the 24-hour load demand curve and that of solar and wind DG follow their hourly power generation. For this purpose, a multi-objective function is developed with consideration of hourly power loss minimisation and profit maximisation without violating the system’s operational constraints. The viability and efficacy of the proposed method are tested on IEEE 33-bus and 69-bus distribution systems for five distinct scenarios of network reconfiguration and renewable DG allocation. The analysis shows that the simultaneous NR and DG have a more substantial impact than considering the cases separately. © 2022 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Electric load dispatching

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Investigation on Mechanical Properties of Al5052/BN Metal Matrix Composite

Investigation on Mechanical Properties of Al5052/BN Metal Ma...

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作者： Kumar, Patnala Padma Ruban, M. Department of Mechanical Engineering Vels Institute of Science Technology & Advanced Studies Chennai600117 India Department of Automobile Engineering Vels Institute of Science Technology & Advanced Studies Chennai600117 India

The paper aims to find the Mechanical properties of HNT and Boron Nitride, reinforced with Aluminium hybrid metal matrix composites. The aluminum matrix material are reinforced with different weight percentage of HNT(3%,5%,7%) and BN(2%,3%,4%).The hybrid matrix are fabricated through sir casting *** mechanical Properties of like hardness, tensile, impact and micro structure of the composites are examined. The hardness and tensile of the composite are increased with increase in weight percentage of boron nitride and HNT. Also the microstructure of the composites shows the clear distribution of the composites and XRD pattern shows the presence of reinforcement in the composites. The hardness and tensile strength increases when 7% of HNT and 4% of boron nitride are added towards the base materials. © 2022

关键词： Microstructure

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Exploring transport properties of quark-gluon plasma in flavor-dependent systems with a holographic model

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Physical Review D 2025年第8期111卷 086033-086033页

作者： Bing Chen Xun Chen Xiaohua Li Zhou-Run Zhu Kai Zhou School of Nuclear Science and Technology University of South China Hengyang 421001 People’s Republic of China Key Laboratory of Quark and Lepton Physics (MOE) Central China Normal University Wuhan 430079 China Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of Education Hengyang 421001 China School of Physics and Telecommunications Engineering Zhoukou Normal University Zhoukou 466001 China School of Science and Engineering The Chinese University of Hong Kong Shenzhen (CUHK-Shenzhen) Guangdong 518172 China Frankfurt Institute for Advanced Studies Ruth Moufang Strasse 1 D-60438 Frankfurt am Main Germany

Based on the holographic model, which incorporates the equation of state and baryon number susceptibility for different flavors, we calculate the drag force, jet quenching parameter, and diffusion coefficient of the heavy quark at finite temperature and chemical potential. The holographic results for the diffusion coefficient align with lattice data for Nf=0 and Nf=2+1, falling within their error margins. The holographic diffusion coefficient for heavy quark in the systems of different flavors is compatible with estimates from A Large Ion Collider Experiment data. The jet quenching parameter in our model demonstrates strong consistency with the estimations obtained from Bayesian analysis of data from both relativistic heavy ion collider and LHC for different flavors. We can confirm the model provides a good description of the transport properties of quark-gluon plasma. The work reinforces the potential of bottom-up holographic model in advancing our understanding of transport properties of hot and dense quark-gluon plasma.

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Effect of the back skeleton ligand on the ultrafast excited-state dynamics of Cu(i) cyano substituted bipyridine complexes

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Physical Chemistry Chemical Physics 2025年第21期27卷 2025 May 14页

作者： Wu, Guanzhi Li, Qingxue Chen, Jinglin Zhang, Wenkai School of Physics and Astronomy Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies Beijing Normal University Beijing 100875 China School of Chemistry and Chemical Engineering Jiangxi University of Science and Technology Ganzhou 341000 China Institute of Physics Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Multiscale Spin Physics Ministry of Education Beijing Normal University Beijing 100875 China

Cu(i) complexes have attracted a lot of research interest as potential alternatives to functional noble metal complexes. In previous research studies of the ultrafast dynamics of Cu(i) complexes, most of the acceptor ligands used are symmetric and examples of only a limited number of asymmetric ligands were reported. To further understand the ultrafast excited state dynamics of Cu(i) complexes with an asymmetric cyano-substituted bipyridine electron acceptor ligand, Cu(i) complexes with 6-cyano-2,2′-bipyridine and 4,4′-dimethyl-6-cyano-2,2′-bipyridine ligands in dichloromethane and acetonitrile were investigated by applying femtosecond time-resolved transient absorption (TA) spectroscopy. From the TA spectra, it was found that two different metal-to-ligand charge transfer (MLCT) states with different nature could be populated after pseudo-Jahn-Teller distortion. Time-dependent density functional theory (TD-DFT) calculation results also support the hypothesis that, in one MLCT state, the electron density is donated from the Cu(i) center to the cyanobipyridine ligand with electron density delocalised on the whole bipyridine ligand and in the other MLCT state the electron density is donated from the Cu(i) center to the cyano-substituted pyridine fragment of the cyanobipyridine ligand. This result indicates that asymmetric electron acceptors may lead to the population of extra excited states compared with symmetric electron acceptors. © 2025 The Royal Society of Chemistry.

关键词： Transient absorption spectroscopy

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Synthesis of structurally diversified BINOLs and NOBINs via palladium-catalyzed C-H arylation with diazoquinones

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Science China Chemistry 2021年第9期64卷 1515-1521页

作者： Ji-Wei Zhang Fei Jiang Ye-Hui Chen Shao-Hua Xiang Bin Tan School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin150001China Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen518055China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen518055China

Privileged biaryl frameworks,BINOL and NOBIN,were efficiently constructed with sole 1-DNQs as arylation reagents under one set of reaction *** judicious selection of palladium-catalytic system plays a pivotal role in the excellent *** transformation accommodated fairly broad substrate generality for both 2-naphthol and N-Boc-2-naphthylamine and afforded the structurally diversified BINOLs and NOBIN derivatives in high ***,the bromosubstituents which cannot survive in conventional palladium-catalyzed reactions were well-compatible with this set of conditions,providing an effective handle for further enriching the library of BINOLs and *** attempts on the asymmetric variant of this reaction were also performed with up to 80:20 er for BINOLs synthesis.

关键词： BINOLs NOBINs high selectivity C-H arylation palladium-catalysis

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