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Status and prospects for symmetric organic redox flow batteries

2002年IEEE十区计算机、通信、控制和电机工程会议

作者： S.H.Li H.Y.Tsai c.m.liaw Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan china Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan china Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan china Ph.D. member IEEE

A three-phase (3φ)switch-mode rectifier(SmR)constructed using single-phase (1φ) modules ispresented in this paper. The Ac sides of three modulesare △-connected, with proper control, good powerquality iu line drawn currents under well-regulatedDc output voltage is obtained. As one module faultoccurs,the proposed 3φSmR becomes *** the worst case, when two constituted 1φmodulesare faulted, the proposed 3φSmR will be operated as1φSmR to continuously supply regulated Dc voltageoutput. As to the control aspect, the dynamic model ofthe 3φSmR under nominal operating condition isestimated. And accordingly, a feedback controller isdesigned to meet the given voltage regulation controlspecifications. Then a robust controller is furtherdeveloped to reduce the control performancedegradation due to the changes of operating conditionand number of connected modules.

关键词： SmR Three-Phase Switch-mode Rectifier constructed using Single-Phase modules

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Journal of Energy chemistry 2025年第1期100卷 125-143页

作者： md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

First-principles prediction of high-entropy-alloy stability

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npj computational materials 2017年第1期3卷 37-43页

作者： Rui Feng Peter K.liaw michael c.Gao michael Widom Department of materials Science and Engineering University of TennesseeKnoxvilleTN 37996USA National Energy Technology Laboratory AECOMP.O.Box 1959AlbanyOR 97321USA Department of Physics Carnegie Mellon UniversityPittsburghPA 15213USA

High entropy alloys(HEAs)are multicomponent compounds whose high configurational entropy allows them to solidify into a single phase,with a simple crystal lattice *** HEAs exhibit desirable properties,such as high specific strength,ductility,and corrosion resistance,while challenging the scientist to make confident predictions in the face of multiple competing *** demonstrate phase stability in the multicomponent alloy system of cr-mo-Nb-V,for which some of its binary subsystems are subject to phase separation and complex intermetallic-phase *** first-principles calculation of free energy predicts that the configurational entropy stabilizes a single body-centered cubic(Bcc)phase from T=1700 K up to melting,while precipitation of a complex intermetallic is favored at lower *** form the compound experimentally and confirm that it develops as a single Bcc phase from the melt,but that it transforms reversibly at lower temperatures.

关键词： alloy intermetallic corrosion

Predicting temperature-dependent ultimate strengths of body-centered-cubic(Bcc)high-entropy alloys

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npj computational materials 2021年第1期7卷 1384-1393页

作者： B.Steingrimsson X.Fan X.Yang m.c.Gao Y.Zhang P.K.liaw Imagars LLc 2062 Thorncroft Drive Suite 1214HillsboroOR 97124USA Department of materials Science and Engineering The University of TennesseeKnoxvilleTN 37996USA University of chinese Academy of Sciences Center of Materials Science and Optoelectronics EngineeringBeijing 100049China National Energy Technology Laboratory 1450 Queen Ave.SWAlbanyOR 97321USA Beijing Advanced Innovation center of materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Qinghai Provincial Engineering Research center of High Performance Light metal Alloys and Forming Qinghai UniversityXining 810016China Shunde Graduate School University of Science and Technology BeijingFoshan 528399China

This paper presents a bilinear log model,for predicting temperature-dependent ultimate strength of high-entropy alloys(HEAs)based on 21 HEA *** consider the break temperature,Tbreak,introduced in the model,an important parameter for design of materials with attractive high-temperature properties,one warranting inclusion in alloy *** reliable operation,the operating temperature of alloys may need to stay below *** introduce a technique of global optimization,one enabling concurrent optimization of model parameters over low-temperature and high-temperature ***,we suggest a general framework for joint optimization of alloy properties,capable of accounting for physics-based dependencies,and show how a special case can be formulated to address the identification of HEAs offering attractive ultimate *** advocate for the selection of an optimization technique suitable for the problem at hand and the data available,and for properly accounting for the underlying sources of variations.

关键词： alloys strength alloy

Structure design and property of multiple-basis-element(mBE)alloys flexible films

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Nano Research 2022年第6期15卷 4837-4844页

作者： Hao Huang Peter K.liaw Yong Zhang Qinghai Provincial Engineering Research center of High Performance Light metal Alloys and Forming Qinghai UniversityXining 810016China State Key Laboratory of Advanced metals and materials University of Science and Technology BeijingBeijing 100083China Department of materials Science and Engineering The University of TennesseeKnoxvilleTN 37996-2100USA Shunde Graduate School University of Science and Technology BeijingFoshan 528399China

A controlled wrinkled structure is a simple and effective approach to achieve unique properties and has been widely used in flexible *** this study,we reported a substrate prestrain method for fabricating wrinkle-structured Zr52Ti34Nb14 multiplebasis-element(mBE)alloy films as biocompatible *** in the film thickness and substrate prestraining enabled a precise control of the amplitude and wavelength of the wrinkled structures,ranging from micrometers to ***,owing to the flexibility of the wrinkled structures,the wrinkle-structure pattern could be adjusted by simply relaxing or further stretching of the substrate,leading to dynamically tunable transmittance and wetting *** result not only reveals Zr52Ti34Nb14 mBE alloy films as a potential flexible material,but also provides a new structural design approach for other mBE alloy systems.

关键词： multiple-basis-element alloy thin films microstructures optical transmission wetting behavior

Ultrastrong and ductile Bcc high-entropy alloys with low-density via dislocation regulation and nanoprecipitates

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Journal of materials Science & Technology 2022年第15期110卷 109-116页

作者： Xuehui Yan Peter K.liaw Yong Zhang Beijing Advanced Innovation center of materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Department of materials Science and Engineering The University of TennesseeKnoxvilleTN 37996United States of America

The high strength is a typical advantage of body-centered-cubic high-entropy alloys(Bcc–HEAs).However,brittleness and weak strain-hardening ability are still their Achilles'***,extraordinary strength together with good tensile ductility are achieved in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(100-x)Al_(x) alloys(at.%,x=10 and 20)at room *** low densities of less than 6 g/cm^(3)are exhibited in these *** nanoprecipitates and diversifying dislocation motions are the keys to achieving such salient *** is worth noting that the tensile strength of 1.8 GPa in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(80)Al_(20)alloy is a record-high value known in reported Bcc–HEAs,as well as a tensile strain over 8%.Furthermore,the maximum strain of~25%in(Zr_(0.5)Ti_(0.35)Nb_(0.15))_(90)Al_(10)alloy can challenge existing limit value,and is accompanied with a tensile strength of 1.2 *** current work does not only provide novel ultra-strong and tough structural materials with low density,but also sheds new light on designing Bcc–HEAs with attractive performances and strain-hardening ability.

关键词： High-entropy alloys mechanical properties Dislocation Nanoprecipitates Strain hardening

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A trend based investment decision approach using clustering and heuristic algorithm

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Science china(Information Sciences) 2014年第9期57卷 204-217页

作者： WU chungmin cHOU Shengchun liaw HorngTwu Graduate Institute of Services and Technology management National Taipei University of Technology Department of Information management Shih Hsin University

This paper proposes a stock price trend clustering and trend investment decision model by using a genetic algorithm to search for optimal solutions and the best investment strategies for different stock price *** new price trend clustering model identifies three types of stock price movements:uptrends,sideways trends,and ***,trends discovered through stock price movements or technical indicator graphs are typically subjective and *** paper takes daily stock prices and trading volume data from the china Shanghai Stock Exchange composite Index(SSEcI)from January 2,1997 to August31,2012,to examine the performance of the proposed trend clustering *** proposed model is also compared to other popular stock market investment strategies to verify its *** result shows that the proposed trend clustering model correctly identifies three different trends in the stock ***,the trend investment strategy model developed by using genetic algorithm methodology performs better than other investment strategies,namely,Granville’s rule,the KD indicator strategy,the buys and holds strategy,and GmA rules,in both bull and bear market *** results prove the proposed new model to be a stable and valid investment strategy.

关键词： clustering genetic algorithms stock trend investment strategy

Serological surveillance for SARS-coV-2 antibodies among students,faculty and staff within a large university system during the pandemic

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World Journal of Virology 2025年第1期14卷 99-107页

作者： marcos G Pinheiro Gabriela G O Alves maria Eduarda R conde Sofia L costa Regina c S Sant’Anna Isa m F Antunes mônica c carneiro Fabio S Ronzei Julia c Scaffo Felipe R Pinheiro Lialyz S Andre Helvecio c Povoa Valéria T Baltar Fabíola Giordani Eduarda S Hemerly Gisele c Alexandre Karla c de Paula márcio Watanabe Antonio claudio L da Nóbrega Jackeline christiane P Lobato Fabio Aguiar-Alves Laboratory of molecular Epidemiology and Biotechnology Rodolpho Albino University LaboratoryFluminense Federal UniversityNiterói 24241000Rio de JaneiroBrazil Estácio de SáUniversity Nova Friburgo 28611135Rio de JaneiroBrazil Pathology Program Medicine schoolFluminense Federal UniversityNiterói 24070090Rio de JaneiroBrazil Department of Pharmaceutical Sciences Lloyd L.Gregory School of PharmacyPalm Beach Atlantic UniversityWest Palm BeachFL 33401United States Health Institute of Nova Friburgo Fluminense Federal UniversityNova Friburgo 28613001Rio de JaneiroBrazil Department of Epidemiology and Biostatistics Institute of Collective Health(ISC)Fluminense Federal UniversityNiterói 24033900Rio de JaneiroBrazil Institute of Physical Education Fluminense Federal UniversityNiterói 24020005Rio de JaneiroBrazil Department of Statistics Fluminense Federal UniversityNiterói 24210200Rio de JaneiroBrazil Department of Physiology and Pharmacology Fluminense Federal UniversityNiterói 24210130Rio de JaneiroBrazil

BAcKGROUND At the end of December 2019,the world faced severe acute respiratory syndrome-coronavirus 2(SARS-coV-2),which led to the outbreak of coronavirus disease 2019(cOVID-19),associated with respiratory *** virus has shown significant challenges,especially for senior citizens,patients with other underlying illnesses,or those with a sedentary *** tests conducted early on have helped identify how the virus is transmitted and how to curb its *** study hypothesis was that the rapid serological test for SARS-coV-2 antibodies could indicate the immunoreactive profile during the cOVID-19 pandemic in a university *** To conduct active surveillance for serological expression of anti-SARS-coV-2 antibodies in individuals within a university setting during the cOVID-19 *** This sectional study by convenience sampling was conducted in a large university in Niteroi-RJ,Brazil,from march 2021 to July *** study population consisted of students,faculty,and administrative staff employed by the university.A total of 3433 faculty members,60703 students,and 3812 administrative staff were invited to *** were gathered through rapid serological tests to detect immunoglobulin(Ig)m and IgG against ***χ²or Fisher's exact test was used to conduct statistical analysis.A 0.20 significance level was adopted for variable selection in a multiple logistic regression model to evaluate *** A total of 1648 individuals were enrolled in the *** proportion of cOVID-19 positivity was 164/1648(9.8%).The adjusted logistic model indicate a positive association between the expression of Igm or IgG and age[odds ratio(OR)=1.16,95%cI:1.02-1.31](Pcontact with a cOVID-19-positive case(OR=3.49,95%cI:2.34-5.37)(Pceived the cOVID-19 vaccine(OR=2.33,95%cI:1.61-3.35)(Pcial isolation(OR=0.59,95%cI:0.41-0.84)(P<0.004).The likelihood of sho

关键词： Serological surveillance SARS-coV-2 antibodies cOVID-19 Serological rapid test Risk factors for cOVID-19

Gain Flattened Raman Fiber Amplifier Using Parameter Optimization and DcF Fiber

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光学学报 2003年第S1期23卷 493-494页

作者： Shien-Kuei liaw Jy-Wang liaw Department of Electronic Engineering Taiwan University of Science and Technology No. 43 Section 4 Keelung Rd. Taipei 106 TaiwanAdvanced Research Division Chung-Hua Telecommunication Laboratory Yang-Mei 326 Taiwan

We investigate two configurations of Raman fiber amplifier in the 1530-1570 nm region. The gain spectrum variation is decreased from 8.31 dB to 2.48 dB when appropriately adjust the individual two pumps and optical fi... 详细信息

关键词： DcF on be as nm than Gain Flattened Raman Fiber Amplifier Using Parameter Optimization and DcF Fiber RFA that

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