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高浑浊河流悬沙质量浓度的地面遥感监测方法

生态环境 2005年第5期14卷 706-709页

作者：周跃吕喜玺陈平 S.liaw 朱云梅昆明理工大学环境科学与工程学院云南昆明650093 新加坡国立大学

以金沙江中下游一级支流龙川江为例,通过探讨河流地面反射光谱与河流悬沙质量浓度的关系,初步开发了河流悬沙质量浓度的地面遥感预测技术。研究发现,基于r800/r550的经验模型,仅能够预测浓度范围在400 g.m-3以下的悬沙质量浓度值,对于... 详细信息

以金沙江中下游一级支流龙川江为例,通过探讨河流地面反射光谱与河流悬沙质量浓度的关系,初步开发了河流悬沙质量浓度的地面遥感预测技术。研究发现,基于r800/r550的经验模型,仅能够预测浓度范围在400 g.m-3以下的悬沙质量浓度值,对于较低悬沙质量浓度的河流或其他水域有较大运用价值。光学拟合技术能够预测龙川江在其整个变化范围的河流悬沙质量浓度,最高预测浓度可以达到13 000 g.m-3。通过直接运用两种方法,或者进一步将它们提升成为卫星遥感运用技术后,对于中国西南众多的江河湖库有着重要的理论和现实意义。

关键词：悬沙质量浓度地面遥感光谱特征

Non-linear behavior in advanced materials

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Journal of Iron and Steel research International 2017年第4期24卷 357-357页

作者： Jun-wei Qiao Gang Wang Yong Zhang Peter K.liaw Wei-hua Wang College of Materials Science and Engineering Taiyuan University of Technology Institute of Materials Shanghai University State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Department of Materials Science and Engineering University of Tennessee Institute of Physics Chinese Academy of Sciences

The 17th IUMrS International Conference in Asia was held in Qingdao from October 20th to 24th,*** conference contained 28international *** of symposia,titled as Serration and Noise Behavior in Advanced Materials,was well organized,which provided an effective platform to discuss the non-linear behavior in advanced materials including high-entropy alloys,bulk metallic glasses,and lightweight alloys,*** speaking,serration and noise phenomenon exist everywhere,such as,

关键词： titled lightweight glasses speaking everywhere Qingdao metallic contained organized entropy

一种低密度耐高温高比强度多层次结构双相高熵合金

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Science China Materials 2023年第2期66卷 780-792页

作者：李亚耸廖卫兵陈怀灿 Jamieson Brechtl 宋温丽殷雯何占兵 Peter K.liaw 张勇 Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Spallation Neutron Source Science Center Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China Energy and Transportation Science Division Oak RidgeTN37831USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science University of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China

本文研究了一种新型低密度(~6.24 g cm^(-3))双相AlTiVCoNi高熵合金,其组织结构由有序L21高熵金属间化合物、无序体心立方结构和纳米L21相多层次结构构成.该合金在1200℃+24 h热处理下未发生相结构转变,在此条件下具有优异的高温相结构... 详细信息

本文研究了一种新型低密度(~6.24 g cm^(-3))双相AlTiVCoNi高熵合金,其组织结构由有序L21高熵金属间化合物、无序体心立方结构和纳米L21相多层次结构构成.该合金在1200℃+24 h热处理下未发生相结构转变,在此条件下具有优异的高温相结构稳定性,其铸态和热处理态的压缩屈服强度相当,达到~1.6 GPa.另外,该合金在室温和600℃条件下表现出了优异的强塑性匹配和优异的比屈服强度,分别达到了约261和210 MPa g^(-1)cm^(3).该合金的超高强度主要源于有序L21相与体心立方相的半共格界面导致的一种强相结构稳定性和多层次结构的复合强化机制.该合金在800和1000℃压缩过程中出现了动态再结晶软化,使得其高温强度有所降低.这种“具有半共格界面L21+体心立方+纳米L21颗粒”的多层次结构设计为开发新型低密度耐高温高熵合金提供了一种新设计思路.

关键词：金属间化合物高熵合金体心立方双相多层次结构高比强度超高强度高温强度

Fracture Toughness and Thermal Shock Properties of Calcium Aluminate Composite with Controlled Duplex Structure

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Fracture Toughness and Thermal Shock Properties of Calcium A...

Heat Transport Study of the Laminar Heat Pipe Heat Exchanger

海峡两岸第二届工程材料研讨会

作者： W.J.Wei H.J.liaw Institute of Materials Science and Engineering National Taiwan University Taipei Taiwan 106 China

This study used monocalcium aluminate (CaAlO, CA) for producing ceramic composites with duplex microstructures by hydration and gelation reactions of the aluminate, and compared the properties with those made by a die-pressing process of mixed powders. Densification of the composite was optimized. The microstructure of sintered bodies, the fracture strengths and toughness of the composites with and without thermal shocking was characterized by different techniques. Experimental results show that the green body with the addition of CA resulted in the formation of CA (CaO·6AlO) platelets, so to reveal two types of microstructures, either in a cluster of agglomerated platelets or uniform distribution of platy CA grains. The former, which appeared a duplex microstructure consisted of dense matrix and distributed clusters of CA platelets, performed an improvement on toughness and thermal shock resistance. Toughness mechanisms of samples with duplex microstructure are also investigated.

关键词： calcium aluminate composite platelets duplex microstructure

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Smart Grid and renewable Energy 2012年第4期3卷 348-354页

作者： Wei-Keng Lin Ke Chine liaw Min-Zen Tsai Min-Gung Chu Engineering & System Science Department National Tsing Hua University Hsinchu Chinese Taipei Tairone Energy Saving Technology Co. Ltd. Taoyuan Chinese Taipei.

The purpose of this experiment is to analyze the performance of the Laminar Heat Pipe Heat Exchanger. The test samples were divided two groups, one is the metal corrugated sheet with heat pipe, and the other is the metal corrugated sheet only. By dipping these two group samples into hot water and to see the thermal image by Infrared thermal imager. The results shown the temperature risen of the sheet with heat pipe was faster than that of the sheet without heat pipe. In addition, the bigger of the temperature difference between hot water temperature and ambient temperature, the quicker of the temperature risen for the metal corrugated sheet, and the temperature of the metal corrugated sheet were homogenous as well. For example, when the water temperature is 30℃, ambient temperature is 20℃, the metal corrugated sheet with heat pipe rise rapidly to 26℃ within 1 minute, while the metal corrugated sheet without heat pipe rise to 22℃ only, this temperature difference would be more obvious with the increasing of the hot water temperature. When the hot water temperature is up to 40℃, the metal corrugated sheet with heat pipe rise rapidly to 31℃ within 1 minute, while the metal corrugated sheet without het pipe is still rise up to 22℃ only. When the hot water temperature is up to 50℃, The metal corrugated sheet with heat pipe rise rapidly to 33℃ within 1 minute, while the sheet without heat pipe still keep at 22℃, the results shown the heat pipe affect the temperature rising speed is obvious, and it also implying heat pipe is a very important parameter for the heat transfer rate of the Laminar Heat Pipe Heat Exchanger.

关键词： Heat Pipe Heat Exchanger Metal Corrugated Sheet

Epigallocatechin Gallate-Stearate Enhances the Efficacy of Antibiotics

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Open Journal of Medical Microbiology 2019年第3期9卷 77-94页

作者： Ayuni Yussof Umme Habiba Deborah liaw Tinchun Chu Lee H. Lee Department of Biological Sciences Seton Hall University South Orange NJ USA Department of Biology Montclair State University Montclair NJ USA

Introduction: The rise in antibiotic resistant cases has caused a global concern. researchers around the world are trying to find a novel alternative to combat this issue. Green tea with its many health benefits, including antibacterial and antiviral activity, has shown to be one of the most promising candidates to be used as an agent to solve this problem. Objective: This study focuses on evaluating the synergistic effects of antibiotics and two green tea polyphenols: epigallocatechin gallate (EGCG), and its modified lipophilic form epigallocatechin gallate stearate (EGCG-S). Methods: In this study, twelve antibiotics and eight bacteria: Gram-positive Staphylococcus aureus (S. aureus), Staphylococcus epidermidis (S. epidermidis) and Bacillus megaterium (B. megaterium);Gram-negative Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), Serratia marcescens (S. marcescens), and Enterobacter aerogenes (E. aerogenes);and acid-fast Mycobacterium smegmatis (M. smegmatis) were used. Antibacterial synergism profiling of EGCG, EGCG-S and antibiotics has been established using a disk diffusion assay. results: The results revealed that both 1% of EGCG and 1% EGCG-S enhanced the antimicrobial activities on antibiotics in various bacteria. Antimicrobial susceptibility study indicated that EGCG-S was able to enhance some antibiotics from the resistant category to intermediate or susceptible and/or from intermediate category to susceptible. Both EGCG and EGCG-S worked comparably on Gram-positive bacteria;in S. aureus, both compounds enhanced 5 antibiotics (AM10, CF30, C30, S10 and TE30) activities while EGCG-S had higher efficiency. B. megaterium were susceptible to most of the antibiotic treatment, thus the impact of EGCG and EGCG-S was insignificant. EGCG-S worked better than EGCG on Gram-negative bacteria;converted 9 antibiotics susceptibility in E. coli and P. aeruginosa, and 8 antibiotics in E. aerogenes. EGCG and EGCG-S also showed synergism on acid-fast bacter

关键词： EGCG EGCG-Stearate Antibiotic resistance Disk Diffusion Methods

Crystal Structures and Textures in the Hot-Forged Ni-Mn-Ga Shape Memory Alloys

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Crystal Structures and Textures in the Hot-Forged Ni-Mn-Ga S...

High throughput synthesis enabled exploration of CoCrFeNi-based high entropy alloys

第三届散裂中子源多学科应用研讨会

作者： P．Zetterstrm P．K．liaw The Studsvik Neutron research Laboratory （NFL） Uppsala University S-61182 Nykping Sweden Department of Materials Science and Engineering The University of Tennessee Knoxville TN37996 USA

＜正＞Three ferromagnetic shape-memory alloys with the chemical compositions of Ni53Mn25Ga22, Ni48Mn30Ga22 and Ni48Mn25Ga22Co5 were prepared by the induction-melting and hot-forging process. The crystal structures were investigated by the neutron powder diffraction technique, showing that Ni53Mn25Ga22 and Ni48Mn25Ga22Co5 have a tetragonal,

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Journal of Materials Science & Technology 2022年第15期110卷 269-282页

作者： L.Zhao L.Jiang L.X.Yang H.Wang W.Y.Zhang G.Y.Ji X.Zhou W.A.Curtin X.B.Chen P.K.liaw S.Y.Chen H.Z.Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Metal Materials CharacterizationCentral Iron and Steel Research InstituteBeijing 100081China Institute for Advance Studies in Precision Materials Yantai UniversityYantai 264005China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Laboratory for Multiscale Mechanics Modeling Ecole Polytechnique Federale de LausanneLausanne CH-1015Switzerland School of Engineering RMIT UniversityMelbourne 3046Australia Department of Materials Science and Engineering The University of Tennessee37996USA

To accelerate the exploration,screening,and discovery of structural high-entropy alloys with targeted properties,the newly developed High-Throughput Hot-Isostatic-Pressing based Micro-Synthesis Approach(HT-HIP-MSA)is employed to efficiently synthesize and characterize 85 combinatorial alloys in a 13-principal element alloying *** Co Cr Fe Ni-based high entropy alloys span 1 quaternary,9 quinary,and 36 senary alloy systems,and their composition-structure-property relationships are characterized and analyzed experimentally and *** the single-phase FCC CoCrFeNi alloy base,with Mn,Cu,Ti,Nb,Ta,Mo,W,Al,and Si as principal element alloying additions,we find(1)the extended Mn solubility in the single-phase FCC CoCrFeNi-Mn_(x) alloys,(2)the destabilizing behavior for most of the quinary and senary alloys,and(3)the distinctive solid-solution-strengthening effects in the *** combining the computational methods,the HT-HIP-MSA can be systematic and economic to explore and refine the compositions,structures,and properties of structural high-entropy alloys.

关键词： High-entropy alloys High-throughput Composition-structure-property

Ti-Zr-Hf-Nb-Ta-Sn high-entropy alloys with good properties as potential biomaterials

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rare Metals 2022年第7期41卷 2305-2315页

作者： Wei Yang Shu-Jie Pang Guan Wang Ying Liu Peter Kliaw Tao Zhang Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100191China AVIC Manufacturing Technology Institute Beijing 100024China Department of Materials Science and Engineering The University of TennesseeKnoxville TN 37996USA

(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))_(100-x)Sn_(x)(x=3,5,and 7;at%)high-entropy alloys(HEAs)with good mechanical properties,corrosion resistance,and biocompatibility were developed as potential *** effects of Sn additions on the microstructure and properties of the HEAs were ***(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))_(100-x)Sn_(x) with x=3 at%exhibited the single body-centered-cubic(BCC)*** HEAs with the further increased Sn contents of x=5 at%and 7 at%were composed of a BCC phase and a hexagonal-close-packed(HCP)-(Sn,Zr)ordered *** addition of Sn improved the compres-sive yield strengths and hardness of the HEAs to 1068-1259 MPa and HV 315-HV 390,*** HEAs also possessed relatively low Young's moduli of 80-91 *** the present Ti-Zr-Hf-Nb-Ta-Sn HEAs,the(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))97Sn3 HEA exhibited the good combination of high yield strength of~1068 MPa,relatively low Young's modulus of 80 GPa,and good plasticity(~45%).The HEAs also possess good bio-corrosion resistance and biocompatibility,parallel to the Ti-6Al-4V *** Ti-Zr-Hf-Nb-Ta-Sn HEAs with the integration of the high yield strength,relatively low Young's modulus,and good corrosion resistance and bio-compatibility are promising for biomedical applications.

关键词： High-entropy alloys Biomaterials Microstructure Mechanical properties Corrosion Biocompatibility