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Water Molecule-Triggered Anisotropic Deformation of Carbon Nitride Nanoribbons Enabling contactless Respiratory Inspection

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CCS Chemistry 2021年第6期3卷 1615-1625页

作者： Yuye Zhang Yongxiu Song Yanfei Shen Kaiyang Chen Qing Zhou Yanqin Lv Hong Yang Ensheng Xu Songqin Liu Lei Liu Yuanjian Zhang Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device Jiangsu Provincial Hi-Tech Key Laboratory for Biomedical ResearchSchool of Chemistry and Chemical EngineeringMedical SchoolSoutheast UniversityNanjing 211189 Institute for Advanced Materials School of Material Science and TechnologyJiangsu UniversityZhenjiang 212013

The exploitation of the interaction between nanostructured matter and small molecules,such as H_(2)O at interfaces via dynamic hydrogen bonding,is essentially the key for smart,responsive nanodevices but remains ***,the authors report that the carbon nitride nanoribbons(CNNRs)with an anisotropic intraplanar and interplanar molecular arrangement underwent a deformation by H_(2)O *** experiments of bulk samples and single nanoribbons disclosed that the reversible formation of a hydrogen-bonded H_(2)O adsorption layer was the source of the CNNRs deformation,reminiscent of the hydration-triggered twist of natural bean pods in ***,CNNRs had a more balanced H_(2)O affinity,enabling a superior response and recovery *** coupling with carbon nanotubes,the authors also converted the deformation of CNNRs into more straightforward electrical readouts with record-fast response *** applied to capture fluctuations in humidity in real-time respiration,a higher detection sensitivity was obtained in a contactless mode,which compared favorably with the clinical breath-testing *** the carbon nitride family with various C/N ratios,surface properties,and topography,this finding that CNNRs are an outstanding H_(2)O transducer would significantly pave the way for the H_(2)O-triggered smart devices in broad prospective applications.

关键词： polymeric carbon nitride anisotropic deformation surface properties water molecules transducer contactless respiratory monitoring

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Modelling and Parameters Identification of Through-Hole Type Wind Turbine contactless Sliprings

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Engineering（科研） 2012年第5期4卷 272-283页

作者： Ali Abdolkhani Aiguo Patrick Hu Nirmal C.-K. Nair Department of Electrical and Computer Engineering University Of Auckland Auckland New Zealand

This paper presents a modelling and parameter identification of through-hole type contactless slipring systems for transferring electrical power for wind turbine pitch control. An equivalent circuit model has been developed from the physical structure and dimensions of the contactless slipring using the duality rules, which is very different form traditional transformer. The circuit inductances are determined by the derived expressions from the system reluctances. In particular, the equivalent resistance representing the core loss of the slipring has been determined using phasor diagram of exciting current. FEM (Finite Element Method) models and practical prototypes are developed for testing and verifycations. Both simulation and experimental results have shown that the developed model gives truthful values for numerical calculations in order to obtain the equivalent electric circuit. The effect of fringing flux around the air gap on mutual inductance and the ways of correcting its effects are analysed. The obtained values have shown that the developed models and derived equations are with high accuracy as compared to the FEM simulation and experimental results.

关键词： CSS (contactless Slipring Systems) Transformer Modeling contactless Power Transfer Wind Turbine Pitch Control

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Lorentz Force Velocimetry for Local Velocity Measurement

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Journal of Iron and Steel Research International 2012年第S1期19卷 578-581页

作者： HEINICKE Christiane PULUGUNDLA Gautam TYMPEL Saskia BOECK Thomas KARCHER Christian SCHUMACHER Joerg RAHNEBERG Ilko FROEHLICH Thomas HILBRUNNER Falko THESS André Department of Mechanical Engineering Ilmenau University of TechnologyIlmenau 98684Germany

Standard flow measurement techniques fail for liquid metals due to their high temperatures,opaqueness and ***,recent developments in the measurement of volumetric fluxes of industrially relevant metal melts have been *** of these methods,Lorentz Force Velocimetry(LFV)is based on the measurement of Lorentz forces generated when an electrically conducting fluid moves through a magnetic *** aim is to extend the working range of this method to the measurement of local flow *** resolve local velocity fluctuations we reduce the size of the permanent magnet that produces the magnetic *** use the fundamental setup of a square duct filled with the eutectic alloy GaInSn and having a cross-section of 5 cm by 5 *** magnet cube employed has an edge length of 1 *** this setup,we investigate both experimentally and numerically the interaction between the liquid metal flow and the non-uniform magnetic *** results help in understanding the effect of flow dynamics on the total Lorentz force.

关键词： liquid metal flow measurement local resolution contactless

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The Feasibility of the Drone Delivery System for Woolworths

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Intelligent Information Management 2022年第4期14卷 119-132页

作者： Weiyi Du Parkville Campus University of Melbourne Melbourne Australia

The report aims to assess the feasibility of Woolworths’ drone delivery system and propose a well-documented solution to this, enabling Woolworths to make decisions about improving its traditional delivery system. This paper analyzes the examples of UAV delivery in the actual situation, points out the existing problems, and then evaluates the feasibility of UAV delivery in the future. This report firstly analyzes the current situation of the use of UAVs and points out the shortcomings of Woolworths’ current delivery system. To be specific, from Woolworths’ point of view, the current distribution system is unsuitable for remote distribution, and the human cost is too high. It also did not produce the expected customer satisfaction, was heavily influenced by the environment and congestion, and did not meet the goal of “no contact” under coronavirus care. This report then evaluates Woolworths’ proposal for a “Drone Delivery System” in the framework of future state analysis. It describes the overall objective and breaks it down into several measurable goals, including enhancing customer loyalty, increasing sales revenue, improving delivery efficiency, and ensuring safety through contactless delivery. In addition, a risk assessment was conducted to identify potential risks associated with this new delivery system. Identify and assess the possibility, impact and treatment of potential risks through the risk register. Subsequently, this report identifies four gaps between Woolworths’ current and future state delivery systems, including emergency delivery failures high freight costs, unmet on-time delivery rates and high risk of COVID-19 infection, and recommends actions to close the gap. Finally, delivering solutions for Woolworths through use cases from a system, process, and people perspective helps the organization determine how to seize opportunities and implement solutions. The results show that there are still many problems in using UAVs for delivery at the present s

关键词： Drone Delivery System contactless COVID-19 State Anlaysis

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Microwave measurement of the conductivity of conducting thin films

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光学精密工程 2003年第1期11卷 59-61页

作者： Y JU, Y HURISAWA, M SAKA(Department of Mechanical Engineering, Tohoku University, Aoba 01, Aramaki, Aoba-ku, Sendai 980-8579, Japan) Department of Mechanical Engineering Tohoku University 日本

A new method to measure the conductivity of conducting thin films in a contactle s s fashion was demonstrated. A microwave compact equipment working at 94 GHz was used to measure the amplitude of the reflection coefficient of the microwave sig na l. Indium Tin Oxide films having conductivity of 8.20×10 4～8.02×10 5 S/m on the glass substrates were used as the samples. An evaluation equation was bui lt to determine the conductivity from the measured amplitude of the reflection c oefficient. The evaluated conductivity of conducting thin films agrees well with their actual value.

关键词： conductivity conductingfilm microwave contactless compactequipment

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