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A systematic review of the inequality of health burdens related to climate change

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 137-153页

作者： Xinke Song Shihui Zhang Hai Huang Qun Ding Fang Guo Yaxin Zhang Jin li mingyu li Wenjia Cai Can Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Department of Earth System Science Tsinghua UniversityBeijing100084China

Climate change significantly impacts human health,exacerbating existing health inequalities and creating new *** study addresses the lack of systematic review in this area by analyzing 2440 publications,focusing on four key terms:health,disparities,environmental factors,and climate *** inclusion criteria limited the selection to English-language,peer-reviewed articles related to climate health hazards,ensuring the relevance and rigor of the synthesized *** process synthesized 65 relevant *** investigation revealed that recent research,predominantly from developed countries,has broadened its scope beyond temperature-related impacts to encompass diverse climate hazards,including droughts,extreme weather,floods,mental health issues,and the intersecting effects of Coronavirus Disease *** has highlighted exposure as the most studied element in the causal chain of climate change-related health inequalities,followed by adaptive capability and inherent *** most significant vulnerabilities were observed among populations with low socioeconomic status,ethnic minorities,and *** study further reveals research biases and methodological limitations,such as the paucity of attention to underdeveloped regions,a narrow focus on non-temperature-related hazards,challenges in attributing climate change effects,and a deficit of large-scale empirical *** findings call for more innovative research approaches and a holistic integration of physical,socio-political,and economic dimensions to enrich climate-health discourse and inform equitable policy-making.

关键词： Climate change Health impact Human well-being Inequality Vulnerability

A novel topology with controllable wideband baseband impedance for power amplifiers

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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 308-315页

作者： Yao YAO Zhijiang DAI mingyu li School of Intelligent Technology and Engineering Chongqing University of Science and TechnologyChongqing400065China School of Microelectronics and Communication Engineering Chongqing UniversityChongqing400065China

This paper presents a novel topology to control the baseband impedance of a power amplifier(PA)to avoid performance deterioration in concurrent dual-band *** topology can avoid pure resonance of capacitors and inductors LC,which leads to a high impedance at some frequency ***,it can be applied to transmitters that are excited by broadband *** particular,by adjusting the circuit parameters and increasing stages,the impedance of the key frequency bands can be flexibly controlled.A PA is designed to support this design *** saturated output power is around 46.7 dBm,and the drain efficiency is>68.2%(1.8-2.3 GHz).Under concurrent two-tone excitation,the drain efficiency reaches around 40%even under 5.5 dB back-off power with the tone spacing from 10 MHz to 500 *** results demonstrate that the proposed topology is capable of controlling wideband baseband impedance.

关键词： Baseband impedance Concurrent dual-band Power amplifier

An extracellular matrix-mimetic coating with dual bionics for cardiovascular stents

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Regenerative Biomaterials 2023年第1期10卷 1149-1160页

作者： Nuoya Chen mingyu li Haoshaung Wu Yumei Qin Jian Wang Kai Xu Rifang Luo li Yang Yunbing Wang Xingdong Zhang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China Shanxi Key Laboratory of Functional Proteins Shanxi Jinbo Bio-Pharmaceutical Co.LtdTaiyuan 030032ShanxiChina Department of Cardiology General Hospital of Northern Theater CommandShenyang 110000China

Anti-inflammation and anti-coagulation are the primary requirements for cardiovascular stents and also the widely accepted trajectory for multi-functional *** this work,we proposed an extracellular matrix(ECM)-mimetic coating for cardiovascular stents with the amplified functionalization of recombinant humanized collagen type III(rhCOL III),where the biomimetics were driven by structure mimicry and component/function ***,the structure-mimic was constructed by the formation of a nanofiber(NF)structure via the polymerization of polysiloxane with a further introduction of amine groups as the nanofibrous *** fiber network could function as a three-dimensional reservoir to support the amplified immobilization of rhCoL *** rhCOL III was tailored for anti-coagulant,anti-inflammatory and endothelialization promotion properties,which endows the ECM-mimetic coating with desired surface *** implantation in the abdominal aorta of rabbits was conducted to validate the in vivo re-endothelialization of the ECM-mimetic *** mild inflammatory responses,anti-thrombotic property,promotion of endothelialization and suppression of excessive neointimal hyperplasia confirmed that the ECM-mimetic coating provided a promising approach for the modification of vascular implants.

关键词： cardiovascular stent recombinant humanized collagen type III extracellular matrix anti-coagulation endothelialization

THERMAL PROCESS OF VACUUM FLUXLESS LASER SOLDERING AND ANALYSIS ON SOLDER SPREADING AND WETTING

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Chinese Journal of Mechanical Engineering 2000年第2期13卷 127-133页

作者： Wang Chunqing li mingyu SunFujiang Feng Wufeng (National key laboratory of welding, Harbin Institute of Technology) 哈尔滨工业大学现代焊接生产技术国家重点实验室黑龙江哈尔滨

In order to study the mechanism of vacuum fluxless soldering on the conditions of laser heating, the method of measuring temperature by the thermocouple is used to analyze the spreading and wetting process of both fluxless Sn-Pb solder in the vacuum surroundings and flux Sn-Pb solder on Cu pad. Solder spreading and wetting affected by the soldering thermal process is also discussed according to the thermodynamics principle. Results show that vacuum fluxless soldering demands higher temperature, and the fall of the solder surface tension is the important factor achieving fluxless laser soldering.

关键词： Fluxless soldering Soldering thermal process Spreading and wetting

Irregular Characteristics of Bond Interface Formation in Ultrasonic Wire Wedge Bonding

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Journal of Materials Science & Technology 2006年第4期22卷 483-486页

作者： mingyu li Hongjun JI Chunqing WANG Au Tai KUNG Han Sur BANG Hee Seon BANG Shenzhen Graduate School of Harbin Institute of Technology Shenzhen 518055 China Microjoining Lab School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Sun East Technology （Holdings） Ltd. Shenzhen 518103 China Department of Naval Architecture and Ocean Engineering Chosun University 375 Seosek Dong Donggu Guangju 501-759 Korea

The mechanism of ultrasonic wire wedge bonding, one of the die/chip interconnection methods, was investigated based on the characteristics of the ultrasonic wire bonding joints. The Al-1%Si wire of 25 μm in diameter was bonded on Au/Ni/Cu pad and the joint cross-section was analyzed by scanning electron microscopy （SEM） and energy-dispersive X-ray spectroscopy （EDX）. The results indicated that it is irregular for the ultrasonic bond formation, non-welded at the centre but joining well at the periphery, especially at the heel and toe of the joint. Furthermore, the diffusion and/or reaction at the cross-section interface are not clear at C-zone, while there exists a strip layer microstructure at P-zone, and the composition is 78.96 at. pct Al and 14.88 at. pct Ni, close to the Al3Ni intermetallic compound. All these observations are tentatively ascribed to the plastic flow enhanced by ultrasonic vibration and repeated cold deformation driving interdiffusion between AI and Ni at bond interface.

关键词： Ultrasonic bonding Irregular joint Interface diffusion Repeated cold deformation

Safe and Stable lithium Metal Batteries Enabled by an Amide-Based Electrolyte

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Nano-Micro Letters 2022年第3期14卷 120-133页

作者： Wanbao Wu Yiyang Bo Deping li Yihong liang Jichuan Zhang Miaomiao Cao Ruitian Guo Zhenye Zhu lijie Ci mingyu li Jiaheng Zhang Sauvage Laboratory for Smart Materials Harbin Institute of Technology(Shenzhen)Shenzhen 518055People’s Republic of China Research Centre of Printed Flexible Electronics School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055People’s Republic of China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055People’s Republic of China Department of Chemistry University of IdahoMoscowID 83844‑2343USA

The formation of lithium dendrites and the safety hazards arising from flammable liquid electrolytes have seriously hindered the development of high-energy-density lithium metal ***,an emerging amide-based electrolyte is proposed,containing liTFSI and butyrolactam in different molar ratios.1,1,2,2-Tetrafluoroethyl-2,2,3,3-tetrafluoropropylether and fluoroethylene carbonate are introduced into the amide-based electrolyte as counter solvent and *** well-designed amide-based electrolyte possesses nonflammability,high ionic conductivity,high thermal stability and electrochemical stability(>4.7 V).Besides,an inorganic/organic-rich solid electrolyte interphase with an abundance of liF,li3N and li-N-C is in situ formed,leading to spherical lithium *** formation mechanism and solvation chemistry of amide-based electrolyte are further inves-tigated by molecular dynamics simulations and density functional *** applied in li metal batteries with liFePO4 and liMn2O4 cathode,the amide-based electrolyte can enable stable cycling performance at room temperature and 60℃.This study provides a new insight into the development of amide-based electrolytes for lithium metal batteries.

关键词： Amide-based electrolyte Nonflammable Inorganic/organic-rich solid electrolyte interphase Dendrite-free lithium metal batteries

Efficient PbS quantum dots tandem solar cells through compatible interconnection layer

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Journal of Energy Chemistry 2024年第11期98卷 47-57页

作者： Gomaa Mohamed Gomaa Khalaf Xinzhao Zhao mingyu li Chunxia li Salman Ali Tianjun Ma Hsien-Yi Hsu Jianbin Zhang Haisheng Song Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina Solar and Space Department National Research Institute of Astronomy and Geophysics(NRIAG)HelwanCairoEgypt School of Energy and Environment&Department of Materials Science and Engineering City University of Hong KongKowloon TongHong Kong 999077China School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074HubeiChina Optics Valley Laboratory Wuhan 430074HubeiChina

Lead sulfide quantum dots(PbS QDs) hold unique characteristics, including bandgap tunability, solutionprocessability etc., which make them highly applicable in tandem solar cells(TSCs). In all QD TSCs, its efficiency lags much behind to their single junction counterparts due to the deficient interconnection layer(ICL) and defective subcells. To improve TSCs performance, we developed three kinds of ICL structures based on 1.34 and 0.96 e V PbS QDs subcells. The control, 1,2-ethanedithiol capped PbS QDs(PbS-EDT)/Au/tin dioxide(SnO_(2))/zinc oxide(Zn O), utilized SnO_(2) layer to obtain high surface ***, its energy level mismatch causes incomplete recombination. Bypassing it, the second ICL(PbS-EDT/Au/Zn O) removed SnO_(2) and boosted the power conversion efficiency(PCE) from 5.75% to 8.69%. In the third ICL(PbS-EDT/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)/Au/Zn O), a thin layer of PTAA can effectively fill fissures on the surface of PbS-EDT and also protect the front cells from solvent penetration. This TSC obtained a PCE of 9.49% with an open circuit voltage of 0.91 V, a short circuit current density of 15.47 m A/cm~2, and a fill factor of 67.7%. To the best of our knowledge, this was the highest PCE achieved by all PbS QD TSCs reported to date. These TSCs maintained stable performance for a long working time under ambient conditions.

关键词： Quantum dots Tandem solar cell Interconnection layer Hysteresis Defect

A supersaturated Cu-Ag nanoalloy joint with ultrahigh shear strength and ultrafine nanoprecipitates for power electronic packaging

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Journal of Materials Science & Technology 2023年第14期145卷 56-65页

作者： Wenwu Zhang Penghao Zhang Dashi Lu Hao Pan Xiangli liu Chengyan Xu Jun Wei mingyu li Hongjun Ji The State Key Laboratory of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology at ShenzhenShenzhen 518055China Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Shenzhen Key Laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Ag-Cu bimetallic nanoalloy,integrating the advantages of reducing migration and cost of nano-Ag and alleviating oxidation of nano-Cu,is a prospective bonding material for power electronic *** Ag-coated Cu nanoparticles(Cu@Ag NPs)paste can execute bonding with high quality at 250℃,and the achieved supersaturated Ag-Cu nanoalloy joint with ultrahigh shear strength(152 MPa)dramatically exceeds most nano-paste *** interstitial solid solutions with atomic-level metallurgical bonds at the interface dominantly promoted the shear ***,the numerous ultrafine nanograin,high proportion of low angle grain boundaries(7.44%)without deformation,and the Cu nanoprecipitates in the joint would improve ***,the high content(16.8%)of∑3 twin boundaries would contribute to the electrical and thermal ***,the multiple strengthening mechanisms with the solid solution,the second precipitated phase,and ultrafine nanograin can dramatically enhance shear strength and electro-thermal conductivity of joints for high-temperature device packaging.

关键词： Supersaturated Ag-Cu solid solution Cu nanoparticle precipitates Ultrafine nanograin Strengthening mechanism Electronic packaging

Heterogeneous system synthesis of high quality PbS quantum dots for efficient infrared solar cells

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Nano Research 2023年第4期16卷 5750-5755页

作者： Bo Wang mingyu li Yuxuan liu Xinyi liang Yang Yang Xinzheng Lan liang Gao Jianbing Zhang Jiang Tang Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074China School of Optical and Electronic Information Huazhong University of Science and Technology(HUST)Wuhan 430074China Wenzhou Advanced Manufacturing Technology Research Institute Huazhong University of Science and TechnologyWenzhou 325035China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China Optics Valley Laboratory Wuhan 430074China

As promising optoelectronic materials,lead sulfide quantum dots(PbS QDs)have attracted great ***,their applications are substantially limited by the QD quality and/or complicated ***,a facile new synthesis is developed for highly monodisperse and halide passivated PbS *** new synthesis is based on a heterogeneous system containing a PbCl_(2)-Pb(OA)_(2)solid-liquid precursor *** solid PbCl_(2)inhibits the diffusion of monomers and maintains a high oversaturation condition for the growth of PbS QDs,resulting in high *** addition,the PbCl_(2)gives rise to halide passivation on the PbS QDs,showing excellent stability in *** high monodispersity and good passivation endow these PbS QDs with outstanding optoelectronic properties,demonstrated by a 9.43%power conversion efficiency of PbS QD solar cells with a bandgap of~0.95 eV(1,300 nm).We believe that this heterogeneous strategy opens up a new avenue optimizing for the synthesis and applications of QDs.

关键词： heterogeneous system synthesis lead sulfide quantum dots high monodispersities halide passivation infrared solar cells