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Grain refinement of Mg-Ca alloys by native MgO particles

Journal of Magnesium and Alloys 2024年第3期12卷 980-996页

作者： shihao Wang Yun Wang Quentin M.Ramasse Zhongyun Fan Super STEM Laboratory SciTech Daresbury CampusDaresbury WA44ADUK School of Chemical and Process Engineering University of LeedsLeeds LS29JTUK BCAST Brunel University LondonUxbridgeMiddlesex UB83PHUK

In Mg-Ca alloys the grain refining mechanism,in particular regarding the role of nucleant substrates,remains the object of *** native MgO is being recognised as a nucleating substrate accounting for grain refinement of Mg alloys,the possible interactions of MgO with alloying elements that may alter the nucleation potency have not been elucidated ***,we design casting experiments of Mg-xCa alloys varied qualitatively in number density of native MgO,which are then comprehensively studied by advanced electron *** results show that grain refinement is enhanced as the particle number density of MgO *** native MgO particles are modified by interfacial layers due to the co-segregation of Ca and N solute atoms at the MgO/Mg *** aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy,we reveal the nature of these Ca/N interfacial layers at the atomic *** of the crystallographic termination of MgO,Ca and N co-segregate at the MgO/Mg interface and occupy Mg and O sites,respectively,forming an interfacial structure of a few atomic *** interfacial structure is slightly expanded,less ordered and defective compared to the MgO matrix due to compositional deviations,whereby the MgO substrate is altered as a poorer template to nucleate Mg *** solidification in a TP-1 mould,the impotent MgO particles account for the grain refining mechanism,where they are suggested to participate into nucleation and grain initiation processes in an explosive *** work not only reveals the atomic engineering of a substrate through interfacial segregation but also demonstrates the effectiveness of a strategy whereby native MgO particles can be harnessed for grain refinement in Mg-Ca alloys.

关键词： Mg-Ca alloy Grain refinement MgO Interfacial segregation STEM/EELS Solidification.

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Ecological-Based Mining:A Coal-Water-Thermal Collaborative Paradigm in Ecologically Fragile Areas in Western China

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Engineering 2024年第7期38卷 209-222页

作者： Xiaoxiu Liu Yifan Zeng Qiang Wu shihao Meng Jiyue Liang Zhuping Hou National Engineering Research Center of Coal Mine Water Hazard Controlling China University of Mining and TechnologyBeijing 100083China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China University of Mining and Technology(Beijing)Inner Mongolia Research Institute Ordos 017000China

A substantial reduction in groundwater level,exacerbated by coal mining activities,is intensifying water scarcity in western China’s ecologically fragile coal mining ***’s national strategic goal of achieving a carbon peak and carbon neutrality has made eco-friendly mining that prioritizes the protection and efficient use of water resources *** on the resource characteristics of mine water and heat hazards,an intensive coal-water-thermal collaborative co-mining paradigm for the duration of the mining process is *** integrated system for the production,supply,and storage of mining companion resources is achieved through technologies such as roof water inrush prevention and control,hydrothermal quality improvement,and deep-injection geological *** active preventive and control system achieved by adjusting the mining technology and a passive system centered on multiobjective drainage and grouting treatment are suggested,in accordance with the original geological characteristics and dynamic process of water *** implementing advanced multi-objective drainage,specifically designed to address the“skylight-type”water inrush mode in the Yulin mining area of Shaanxi Province,a substantial reduction of 50%in water drillings and inflow was achieved,leading to stabilized water conditions that effectively ensure subsequent safe coal *** integrated-energy complementary model that incorporates the clean production concept of heat utilization is also *** findings indicate a potential saving of 8419 t of standard coal by using water and air heat as an alternative heating source for the Xiaojihan coalmine,resulting in an impressive energy conservation of 50.2%and a notable 24.2%reduction in carbon *** ultra-deep sustained water injection of 100 m^(3)·h^(-1)in a single well would not rupture the formation or cause water leakage,and 7.87×10^(5)t of mine water could be effectively stored in the Liujiagou Formation,presenti

关键词： Dual carbon targets Coal-water-thermal co-mining Ecologically fragile areas Mine-water control Resource utilization

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Achieving asymmetric redox chemistry for oxygen evolution reaction through strong metal-support interactions

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Journal of Energy Chemistry 2024年第9期96卷 526-535页

作者： shihao Wang Meiling Fan Hongfei Pan Jiahui Lyu Jinsong Wu Haolin Tang Haining Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu LaboratoryFoshan 528200GuangdongChina International School of Materials Science and Engineering(School of Materials and Microelectronics) Wuhan University of TechnologyWuhan 430070HubeiChina Nanostructure Research Centre Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Key Laboratory of Fuel Cell Wuhan University of TechnologyWuhan 430070HubeiChina

Water electrolysis poses a significant challenge for balancing catalytic activity and stability of oxygen evolution reaction(OER)*** this study,we address this challenge by constructing asymmetric redox chemistry through elaborate surface OO–Ru–OH and bulk Ru–O–Ni/Fe coordination moieties within single-atom Ru-decorated defective NiFe LDH nanosheets(Ru@d-NiFe LDH)in conjunction with strong metal-support interactions(SMSI).Rigorous spectroscopic characterization and theoretical calculations indicate that single-atom Ru can delocalize the O 2p electrons on the surface and optimize d-electron configurations of metal atoms in bulk through ***^(18)O isotope labeling experiment based on operando differential electrochemical mass spectrometry(DEMS),chemical probe experiments,and theoretical calculations confirm the encouraged surface lattice oxygen,stabilized bulk lattice oxygen,and enhanced adsorption of oxygen-containing intermediates for bulk metals in Ru@d-NiFe LDH,leading to asymmetric redox chemistry for *** Ru@d-NiFe LDH electrocatalyst exhibits exceptional performance with an overpotential of 230 mV to achieve 10 mA cm^(−2)and maintains high robustness under industrial current *** approach for achieving asymmetric redox chemistry through SMSI presents a new avenue for developing high-performance electrocatalysts and instills confidence in its industrial applicability.

关键词： Reaction redox chemistry Strong metal-support interactions Layered double hydroxides Electrocatalysts Water electrolysis

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Three-dimensional constrained gravity inversion of Moho depth and crustal structural characteristics at Mozambique continental margin

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Acta Oceanologica Sinica 2024年第2期43卷 120-129页

作者： shihao Yang Zhaocai Wu Yinxia Fang Mingju Xu Jialing Zhang Fanlin Yang College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Submarine Geoscience Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China School of Geomatics and Municipal Engineering Zhejiang University of Water Resources and Electric PowerHangzhou 310018China Ocean College Zhejiang UniversityZhoushan 316021China

Mozambique's continental margin in East Africa was formed during the break-off stage of the east and west Gondwana lands. Studying the geological structure and division of continent-ocean boundary(COB) in Mozambique's continental margin is considered of great significance to rebuild Gondwana land and understand its movement mode. Along these lines, in this work, the initial Moho was fit using the known Moho depth from reflection seismic profiles, and a 3D multi-point constrained gravity inversion was carried out. Thus, highaccuracy Moho depth and crustal thickness in the study area were acquired. According to the crustal structure distribution based on the inversion results, the continental crust at the narrowest position of the Mozambique Channel was detected. According to the analysis of the crustal thickness, the Mozambique ridge is generally oceanic crust and the COB of the whole Mozambique continental margin is divided.

关键词： 3D constrained gravity inversion continent-ocean boundary Mozambique continental margin Moho depth

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Power-efficient programmable integrated multiport photonic interferometer in CMOS-compatible silicon nitride

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Photonics Research 2024年第3期12卷 I0011-I0020页

作者： SHUQING LIN YANFENG ZHANG ZHAOYANG WU shihao ZENG QING GAO JIAQI LI XIAOQUN YU SIYUAN YU State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Hefei National Laboratory Hefei 230088China

Silicon nitride(SiNx)is an appealing waveguide material choice for large-scale,high-performance photonic integrated circuits(PICs)due to its low optical ***,SiNx PICs require high electric power to realize optical reconfiguration via the weak thermo-optic effect,which limits their scalability in terms of device density and chip power *** report a 6-mode programmable interferometer PIC operating at the wavelength of 1550 nm on a CMOS-compatible low-temperature inductance coupled plasma chemical vapor deposition(ICP-CVD)silicon nitride *** employing suspended thermo-optic phase shifters,the PIC achieves 2×improvement in compactness and 10×enhancement in power efficiency compared to conventional *** 6-dimensional linear transformations are demonstrated including cyclic transformations and arbitrary unitary *** work demonstrates the feasibility of fabricating power-efficient large-scale reconfigurable PICs on the low-temperature ICP-CVD silicon nitride platform.

关键词： unitary arbitrary figuration

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Waste to treasure:Reutilization of fluid catalytic cracking coke block as photothermal conversion material for water evaporation

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Particuology 2024年第5期88卷 62-70页

作者： Zhuwei Gao Chengxin Li Jingjing He Zhuo Wang Xinyu Qi Lan He shihao Wang Zhongxin Liu School of Chemical Engineering and Technology Hainan UniversityHaikou 570228China TJ-YZ School of Network Science Haikou University of EconomicsHaikou 570203China School of Food Science and Engineering Hainan UniversityHaikou 570228China Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education Hainan UniversityHaikou 570228China Hainan Provincial Key Laboratory of Fine Chemicals Hainan UniversityHaikou 570228China

This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke ***,we analyzed the basic characteristics and chemical composition of FCC coke *** results showed that the main components were carbon,oxygen,and aluminum,accounting for 60.8%,26.6%,and 11.5%,*** the conventional catalytic cracking reaction temperature from 500℃ to 600℃,the formation of the first aromatic hydrocarbon was particularly important for the formation of *** condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking,while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical *** addition,the membrane prepared by powdered coke had excellent photothermal conversion ability,which could be heated to more than 110℃ within 360 s under two fixed light *** evaporation rate of photothermal water was 5.89 kg m^(2) h^(−1),which has great industrial application *** works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.

关键词： Coking process Reutilization of FCC coke Carbonaceous deposition Membrane Photothermal conversion

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计及保护动作与换相失败的逆变侧阀短路故障定位

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电力自动化设备 2023年第8期43卷 133-140页

作者：王力黄明伟周仕豪曾祥君长沙理工大学电气与信息工程学院湖南长沙410114 国网江西省电力有限公司电力科学研究院江西南昌330096

鉴于现有阀短路故障定位方法依赖桥臂电流信息,而目前工程实际中存在桥臂电流不易获取、定位精度不高的问题,提出了一种无需桥臂电流的逆变侧阀短路故障定位方法。考虑控保系统对不同位置阀短路故障响应特性以及逆变侧阀短路故障引起的... 详细信息

鉴于现有阀短路故障定位方法依赖桥臂电流信息,而目前工程实际中存在桥臂电流不易获取、定位精度不高的问题,提出了一种无需桥臂电流的逆变侧阀短路故障定位方法。考虑控保系统对不同位置阀短路故障响应特性以及逆变侧阀短路故障引起的换相失败对故障特征的影响,分析了不同时刻发生逆变侧区内4种典型阀短路故障的故障特征。结合逆变侧保护动作情况和系统电气量特征,设计了不同位置阀短路故障识别判据,进而实现逆变侧换流器区不同位置阀短路故障定位。基于RTDS与实际控保系统的数模混合仿真验证了所提故障定位方法的有效性。

关键词：高压直流输电阀短路故障故障定位换相失败 RTDS数模混合仿真

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Combatting Pathogenic Bacteria with Synthetic Immunotherapeutics from Chitosan:Antibody Recruiting at Engineered Bacterial Surface with Peptidoglycan Analogs

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CCS Chemistry 2024年第6期6卷 1448-1457页

作者： Yuan Xu shihao Song Hongwei Duan Yinyue Deng Xue-Wei Liu School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological UniversitySingapore 637371 Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikou 570228 School of Pharmaceutical Sciences(Shenzhen) Shenzhen Campus of Sun Yat-sen UniversitySun Yat-sen UniversityShenzhen 518107

The emergence of microbial drug resistance,coupled with the paucity of new antibiotics poses an impending threat to public *** this work,we drew inspiration from synthetic peptidoglycan oligomers and successfully constructed antibody-recruiting peptidoglycan analogs,2a-d,with excellent safety profiles and high efficiencies in recruiting antibodies across different ***,we demonstrated that these peptidoglycan analogs could be readily incorporated into bacteria cell walls,whereby both simple monoclonal and pooled human serum antibodies effectively congregated to the surfaceengineered bacteria,leading to the complete extermination of the engineered bacterial cells both in vitro and in *** peptidoglycan analog agents for recruiting endogenous antibodies to combat pathogenic bacteria enable further development of promising broad-spectrum immunotherapeutics.

关键词： chitosan bacterial infection endogenous antibodies bacterial surface engineering peptidoglycan analogs

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Aberrant epithelial cell interaction promotes esophageal squamous-cell carcinoma development and progression

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Signal Transduction and Targeted Therapy 2024年第1期9卷 279-294页

作者： Liping Chen shihao Zhu Tianyuan Liu Xuan Zhao Tao Xiang Xiao Hu Chen Wu Dongxin Lin Department of Etiology and Carcinogenesis National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Key Laboratory of Cancer Genomic Biology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Collaborative Innovation Center for Cancer Personalized Medicine Nanjing Medical UniversityNanjing 211166China CAMS Oxford Institute Chinese Academy of Medical SciencesBeijing 100006China Sun Yat-sen University Cancer Center State Key Laboratory of Oncology in South ChinaGuangzhou 510060China

Epithelial-mesenchymal transition(EMT)and proliferation play important roles in epithelial cancer formation and progression,but what molecules and how they trigger EMT is largely *** we performed spatial transcriptomic and functional analyses on samples of multistage esophageal squamous-cell carcinoma(ESCC)from mice and humans to decipher these critical *** investigating spatiotemporal gene expression patterns and cell–cell interactions,we demonstrated that the aberrant epithelial cell interaction via EFNB1-EPHB4 triggers EMT and cell cycle mediated by downstream SRC/ERK/AKT *** aberrant epithelial cell interaction occurs within the basal layer at early precancerous lesions,which expands to the whole epithelial layer and strengthens along the cancer development and *** analysis revealed that the aberrant EFNB1-EPHB4 interaction is caused by overexpressedΔNP63 due to TP53 mutation,the culprit in human ESCC *** results shed new light on the role of TP53-TP63/ΔNP63-EFNB1-EPHB4 axis in EMT and cell proliferation in epithelial cancer formation.

关键词： esophageal TP53 squamous

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Access to advanced sodium-ion batteries by presodiation:Principles and applications

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Journal of Energy Chemistry 2024年第5期92卷 162-175页

作者： shihao Zhang Ruoyu Cao Xiangjun Pu Along Zhao Weihua Chen Chunhua Song Yongjin Fang Yuliang Cao College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina College of Chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001HenanChina Shenzhen Janaenergy techonulogy Co. Ltd.Shenzhen 518000GuangdongChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhou 213001JiangsuChina Zonergy Corporation NO.68 Fucang RoadYantan DistrictZigong 643030SichuanChina

Sodium-ion batteries(SIBs)are expected to offer affordability and high energy density for large-scale energy storage ***,the commercial application of SIBs is hurdled by low initial coulombic efficiency(ICE),continuous Na loss during long-term operation,and low sodium-content of cathode *** this scenario,presodiation strategy by introducing an external sodium reservoir has been rationally proposed,which could supplement additional sodium ions into the system and thereby markedly improve both the cycling performance and energy density of *** this review,the significance of presodiation is initially introduced,followed by comprehensive interpretation on technological properties,underlying principles,and associated approaches,as well as our perspectives on present inferiorities and future research ***,this contribution outlines a distinct pathway towards the presodiation methodology,of significance but still in its nascent phase,which may inspire the targeted guidelines to explore new chemistry in this field.

关键词： Presodiation Increased coulombic efficiency High reversible capacity Sodium ion batteries

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