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Layered Potassium Titanium Niobate/Reduced Graphene Oxide Nanocomposite as a Potassium‑Ion Battery Anode

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Nano-Micro Letters 2024年第1期16卷 1-16页

作者： charlie a.f.nason Ajay Piriya Vijaya Kumar Saroja Yi Lu Runzhe Wei Yupei Han Yang Xu Department of Chemistry University College London20 Gordon StreetLondon WC1H 0AJUK

With graphite currently leading as the most viable anode for potassium-ion batteries(KIBs),other materials have been left relatively *** metal oxides are among these,with many positive attributes such as synthetic maturity,longterm cycling stability and fast redox ***,to address this research deficiency we report herein a layered potassium titanium niobate KTiNbO5(KTNO)and its rGO nanocomposite(KTNO/rGO)synthesised via solvothermal methods as a high-performance anode for *** effective distribution across the electrically conductive rGO,the electrochemical performance of the KTNO nanoparticles was *** potassium storage performance of the KTNO/rGO was demonstrated by its first charge capacity of 128.1 mAh g^(−1) and reversible capacity of 97.5 mAh g^(−1) after 500 cycles at 20 mA g^(−1),retaining 76.1%of the initial capacity,with an exceptional rate performance of 54.2 mAh g^(−1)at 1 A g^(−1).furthermore,to investigate the attributes of KTNO in-situ XRD was performed,indicating a low-strain ***-situ X-ray photoelectron spectra further investigated the mechanism of charge storage,with the titanium showing greater redox reversibility than the *** work suggests this lowstrain nature is a highly advantageous property and well worth regarding KTNO as a promising anode for future high-performance KIBs.

关键词： Potassium-ion batteries Intercalation Transition metal oxides Anodes Nanocomposite

Importance of Air-Sea Coupling in Simulating Tropical Cyclone Intensity at Landfall

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Advances in Atmospheric Sciences 2022年第10期39卷 1777-1786页

作者： charlie C.f.LOK Johnny C.L.CHAN Ralf TOUMI School of Energy and Environment City University of Hong KongHong KongChina Department of Physics Imperial CollegeLondon SW72AZUK

An atmosphere-only model system for making seasonal prediction and projecting future intensities of landfalling tropical cyclones(TCs)along the South China coast is upgraded by including ocean and wave models.A total of 642 TCs have been re-simulated using the new system to produce a climatology of TC intensity in the South China *** comparisons of the simulations from the atmosphere-only and the fully coupled systems reveal that the inclusion of the additional ocean and wave models enable differential sea surface temperature responses to various TC characteristics such as translational speed and *** particular,interaction with the ocean does not necessarily imply a weakening of the TC,with the coastal bathymetry possibly playing a role in causing a near-shore intensification of the *** results suggest that to simulate the evolution of TC structure more accurately,it is essential to use an air-sea coupled model instead of an atmosphere-only model.

关键词： tropical cyclone intensity tropical cyclone landfall seasonal prediction air-sea coupling

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功率因数校正的数字控制技术应用研究

南京航空航天大学学报 2007年第2期39卷 164-170页

作者：陈新 charlie Wu W Hutchings 南京航空航天大学航空电源航空科技重点实验室南京210016 8/16Bit Products Division Freescale Semiconductor Inc

以单管Boost型PfC电路作为研究对象,分别针对电流断续、电流临界连续和电流连续3种工作模态,详细讨论了数字控制PfC的实现方法和设计过程,并分别给出了样机实验结果;此外,结合M C 56f 8013的外设资源特点,给出了基于DSP的PfC详细的系统... 详细信息

以单管Boost型PfC电路作为研究对象,分别针对电流断续、电流临界连续和电流连续3种工作模态,详细讨论了数字控制PfC的实现方法和设计过程,并分别给出了样机实验结果;此外,结合M C 56f 8013的外设资源特点,给出了基于DSP的PfC详细的系统接口设计,包括PWM控制策略和同步控制AD采样环节。对PfC的数字控制方案进行了系统研究,提供了不同工作模式下的完整数字控制解决方案,为功率因数的数字控制技术应用提供了较好的参考作用。

关键词：数字信号处理功率因数校正数字控制 PI控制

Performance of clinical signs and symptoms,rapid and reference laboratory diagnostic tests for diagnosis of human African trypanosomiasis by passive screening in Guinea:a prospective diagnostic accuracy study

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Infectious Diseases of Poverty 2023年第2期12卷 117-118页

作者： Oumou Camara Mamadou Camara Laura Cristina falzon Hamidou Ilboudo Jacques Kaboré charlie franck Alfred Compaoré Eric Maurice fèvre Philippe Büscher Bruno Bucheton Veerle Lejon Programme National de Lutte contre la Trypanosomiase Humaine Africaine Conakry Guinea International Livestock Research Institute Nairobi Kenya Institute of Infection Veterinary and Ecological Sciences University of Liverpool Liverpool UK Clinical Research Unit of Nanoro Institute for Health Science Research (IRSS) Ouagadougou Burkina Faso Vector-Borne Diseases and Biodiversity Unit International Research and Development Center on Livestock in Sub-Humid Areas (CIRDES) Bobo-Dioulasso Burkina Faso Unit of Research and Training in Life and Earth Sciences University of Nazi Boni Bobo-Dioulasso Burkina Faso Department of Biomedical Sciences Institute of Tropical Medicine Antwerp Belgium UMR Intertryp IRD-CIRAD French National Research Institute for Sustainable Development (IRD) University of Montpellier Montpellier France

Background Passive diagnosis of human African trypanosomiasis(HAT)at the health facility level is a major component of HAT control in *** examined which clinical signs and symptoms are associated with HAT,and assessed the performance of selected clinical presentations,of rapid diagnostic tests(RDT),and of reference laboratory tests on dried blood spots(DBS)for diagnosing HAT in *** The study took place in 14 health facilities in Guinea,where 2345 clinical suspects were tested with RDTs(HAT Sero-K-Set,rHAT Sero-Strip,and SD Bioline HAT).Seropositives underwent parasitological examination(reference test)to confirm HAT and their DBS were tested in indirect enzyme-linked immunoassay(ELISA)/Trypanosoma brucei gambiense,trypanolysis,Loopamp Trypanosoma brucei Detection kit(LAMP)and m18S quantitative PCR(qPCR).Multivariable regression analysis assessed association of clinical presentation with ***,specificity,positive and negative predictive values of key clinical presentations,of the RDTs and of the DBS tests for HAT diagnosis were *** The HAT prevalence,as confirmed parasitologically,was 2.0%(48/2345,95%CI:1.5–2.7%).Odds ratios(OR)for HAT were increased for participants with swollen lymph nodes(OR=96.7,95%CI:20.7–452.0),important weight loss(OR=20.4,95%CI:7.05–58.9),severe itching(OR=45.9,95%CI:7.3–288.7)or motor disorders(OR=4.5,95%CI:0.89–22.5).Presence of at least one of these clinical presentations was 75.6%(95%CI:73.8–77.4%)specific and 97.9%(95%CI:88.9–99.9%)sensitive for *** Sero-K-Set,rHAT Sero-Strip,and SD Bioline HAT were respectively 97.5%(95%CI:96.8–98.1%),99.4%(95%CI:99.0–99.7%)and 97.9%(95%CI:97.2–98.4%)specific,and 100%(95%CI:92.5–100.0%),59.6%(95%CI:44.3–73.3%)and 93.8%(95%CI:82.8–98.7%)sensitive for *** RDT’s positive and negative predictive values ranged from 45.2–66.7%and 99.2–100%*** DBS tests had specificities≥92.9%.While LAMP and m18S qPCR sensitivities were below 50%,trypanolysis and E

关键词： Human African trypanosomiasis Trypanosoma brucei gambiense Diagnosis Clinical Rapid diagnostic test Sensitivity Specificity Dried blood spot Trypanolysis

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基于DSC控制的数字功率因数校正模块应用

电工技术学报 2006年第12期21卷 98-103,121页

作者：陈新 charlie Wu W.Hutchings 南京航空航天大学航空电源航空科技重点实验室南京210016 freescale Semiconductor Inc. arizona85284

数字控制技术和电力电子应用之间结合逐渐紧密,功率因数校正(PfC)是电力电子技术的一个重要应用,本文利用freescale公司新数字信号控制器(DSC)MC56f8323,完成了基于DSC的功率因数校正模块应用研究。本文提供了PfC变换器的完整数字控制... 详细信息

数字控制技术和电力电子应用之间结合逐渐紧密,功率因数校正(PfC)是电力电子技术的一个重要应用,本文利用freescale公司新数字信号控制器(DSC)MC56f8323,完成了基于DSC的功率因数校正模块应用研究。本文提供了PfC变换器的完整数字控制解决方案,包括改进的数字PfC算法设计、适用于数字控制特点的变换器模型分析和控制参数推导、基于DSC的PfC变换器的系统软件设计、以及PWM控制信号产生策略等,最后用一台500W实验样机验证了数字控制的优良系统性能。

关键词：功率因数校正数字信号控制器 PI控制数字控制

Relationship Between Metabolic fitness and Performance in Police Occupational Tasks

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Journal of Science in Sport and Exercise 2021年第2期3卷 179-185页

作者： Elisa f.D.Canetti J.Jay Dawes Phoebe H.Drysdale Robert Lockie charlie Kornhauser Ryan Holmes Ben Schram Robin M.Orr faculty of Health Sciences and Medicine Bond Institute of Health and SportBond University2 Promethean WayGold CoastQLD 4226Australia Tactical Research Unit Bond UniversityGold CoastQLD 4226Australia School of Kinesiology Applied Health and RecreationOklahoma State University183 Colvin Recreation CenterStillwaterOK 74078USA California State fullerton 800 N.State College BlvdFullertonCA 92831-3599USA Colorado State Patrol LakewoodCOUSA

Purpose To determine the relationship between metabolic fitness test scores and performance in police occupational *** Retrospective data from 106 law enforcement officers who completed two metabolic fitness assessments[anaerobic:a 20-m (10-m and 20-m splits) sprint,aerobic:20 m Multi-Stage fitness Test (20 m-MSfT)]and three routine occupational tasks[1.22 m fence jump (fJ),8.5 m Victim Drag (VD with 102.3 kg) and "Get-up" (GU)]were collected.A Person's cor-relation coefficient and a standard multiple regression were used to assess the relationship between and predictive ability of,respectively,the fitness tests scores and performance on occupational *** There was a significant positive correlation between the 10-m sprint scores and fJ (r=0.524,Pficantly and moderately correlated with fJ (r=0.573,P f the performance in the occupational tasks *** MSfT fitness assessment had a small,albeit significant negative correlation with the three tasks:fJ (r=-0.360,Pf metabolic fitness correlated with faster performance in police officer occupational tasks,particu-larly ones of an anaerobic nature (*** maximal sprint tests).In addition to typical aerobic fitness conditioning,anaerobic fitness conditioning could be vital for optimal performance in physically demanding tasks required of police officer.

关键词： Police Occupational health Physical fitness Work performance Rehabilitation

DOWNSTREAM DEVELOPMENT DURING THE EXTRATROPICAL TRANSITION Of TROPICAL CYCLONES:OBSERVATIONAL EVIDENCE AND INfLUENCE ON STORM STRUCTURE

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Tropical Cyclone Research and Review 2012年第4期1卷 430-447页

作者： LILI LIU NOEL E.DAVIDSON HONGYAN ZHU charlie C.f.LOK Centre for Australian Weather and Climate Research A partnership between CSIRO and the Bureau of MeteorologyMelbourneAustralia Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Graduate University of Chinese Academy of SciencesBeijing 100049China

Observational evidence is presented that during Extratropical Transition(ET) of Tropical Cyclones(TCs),Downstream Development(DD) is frequently *** show that DD results in rapid changes to the environment.A critical flow change is the development of a low-level trough,sandwiched between two developing *** trough appears to merge with the storm,seemingly holding it upright and allowing it to withstand the damaging effects of wind *** this way the storm can eventually reach the favourable equatorward entrance region of the upper *** evaluate the mechanism,two sets of simulations have been run:one using high-resolution,full physics integrations and another using coarse-resolution with dry physics and the TC removed from the initial *** show that the dry dynamics can establish the large scale environment to enable the transition to *** process can produce:(a) the deep,vertically-aligned,low-level pressure trough that merges with the storm,and(b) a partial inhibition through subsidence to embedded convection,allowing the boundary layer to moisten via(i) sustained surface fluxes,and(ii) enhanced horizontal moisture flux convergence from the environmental flow *** produces potential for more intense convective activity and vortex resiliency even in relatively strong,deep vertical wind shear.

关键词： Observational evidence Extratropical Transition Tropical Cyclones

OBJECTIVE ESTIMATION Of THE RADIUS Of THE OUTERMOST CLOSED ISOBAR IN TROPICAL CYCLONES

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Tropical Cyclone Research and Review 2014年第1期3卷 1-21页

作者： HARRY C.WEBER charlie C.f.LOK NOEL E.DAVIDSON YI XIAO fachhochschule des Bundes für offentliche Verwaltung Fachbereich WetterdienstFürstenfeldbruckGermany Centre for Australian Weather and Climate Research A partnership between the Australian Bureau of Meteorology and CSIROMelbourneAustralia

Increased understanding of the importance of TC structure in dynamical,climatological and prediction studies makes determination of TC size important. A new algorithm for the objective estimation of the radius of outermost closed isobar(roci) has been developed. The new method uses storm position and global analyses of mean sea level pressure to compute a mean(axisymmetric) roci. This radius can be used,together with the central pressure,for the construction of a synthetic vortex that is initialized in a numerical prediction model. The method also has important applications in dynamical and climatological studies of TC intensity,size and structure. The algorithm is robust and capable of estimating roci,even in the case of a weak system that may not have a closed isobar in the global analysis. The values produced by the new method are shown to be more consistent than the corresponding operational estimates which are subjective and produced under strong time constraints. Statistical comparison between subjective and objective estimates gives a mean absolute difference of 110 km,which given the difficulty in making a subjective estimate,is satisfactory. In addition,even though limitations exist with the estimates of vortex parameters like the radius to gales(r34),comparison with estimates from an extended best track data set provides independent evaluation of the scheme. Mean absolute difference for r34 for around 3200 cases is near 80 km,even though the best track estimates are subjective and the objective r34 is estimated only from storm central pressure and the objective roci. This validation suggests that the algorithm can be used to obtain useful size estimates of TCs.

关键词： tropical cyclone size estimation

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基于DSC控制的移相全桥DC/DC变换器

电力电子技术 2006年第5期40卷 38-41页

作者：陈新 charlie WU WHut chings 南京航空航天大学江苏南京210016 DSP Operation 8/16 Bit Products DivisionFreescale Semiconductor Inc.

数字控制由于高集成度带来的低成本、设计沿继性、控制灵活等优点而应用逐渐广泛,电力电子应用逐渐朝着高频化方向发展,这也对高频开关电源的数字控制提出了要求。利用freescale新型号数字信号控制器(DigitalSingnalController,DSC)MC56... 详细信息

数字控制由于高集成度带来的低成本、设计沿继性、控制灵活等优点而应用逐渐广泛,电力电子应用逐渐朝着高频化方向发展,这也对高频开关电源的数字控制提出了要求。利用freescale新型号数字信号控制器(DigitalSingnalController,DSC)MC56f8323的高性能特性,完成了基于DSC的带同步整流的高频软开关移相全桥变换器的数字控制,描述了DSC产生软件移相控制策略,并给出了详细的数字控制系统设计和软件结构设计,最后用一台500W实验样机验证了数字控制所带来的优良的系统性能。

关键词：变换器移相全桥数字控制/数字信号控制器数字信号处理器