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A new study on formation mechanism of ordered porous anodized metal oxides

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Rare Metals 2024年第10期43卷 5410-5418页

作者： Xi-Di Sun Xin Guo jia-han zhang Jing Wu Yi Shi Hui-Yuan Sun Cao-Feng Pan Li-jia Pan Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China College of Physics and Hebei Advanced Thin Film Laboratory Hebei Normal UniversityShijiazhuang 050024China Institute of Atomic Manufacturing Beihang UniversityBeijing 100191China

The preparation of ordered porous metal oxide films by anodic oxidation is an efficient and simple preparation ***,there has been no unified explanation about the formation mechanism of the porous structure for many *** this paper,the relationship between the crystal structure of metals and the morphology of ordered porous metal oxide films is *** influence of the crystal structures of different metals on the optimal morphology of porous films is discussed.

关键词： ordered mechanism metals

Exploitation technology of pressure relief coalbed methane in vertical surface wells in the Huainan coal mining area

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Mining Science and Technology 2009年第1期19卷 25-30页

作者： han jia-zhang SANG Shu-xun CHENG Zhi-zhong HUANG Hua-zhou School of Resource and Geoscience China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China Huainan Mining Group Huainan A nhui 232000 China

Exploitation technology of pressure relief coalbed methane in vertical surface wells is a new method for exploration of gas and coalbed methane exploitation in mining areas with high concentrations of gas, where tectonic coal developed. Studies on vertical surface well technology in the Huainan Coal Mining area play a role in demonstration in the use of clean, new energy resources, preventing and reducing coal mine gas accidents and protecting the environment. Based on the practice of gas drainage engineering of pressure relief coalbed methane in vertical surface wells and combined with relative geological and exploration en- gineering theories, the design principles of design and structure of wells of pressure relief coalbed methane in vertical surface wells are studied. The effects of extraction and their causes are discussed and the impact of geological conditions on gas production of the vertical surface wells are analyzed. The results indicate that in mining areas with high concentrations of gas, where tectonic coal developed, a success rate of pressure relief coalbed methane in surface vertical well is high and single well production usually great. But deformation due to coal exploitation could damage boreholes and cause breaks in the connection between aquifers and bore-holes, which could induce a decrease, even a complete halt in gas production of a single well. The design of well site location and wellbore configuration are the key for technology. The development of the geological conditions for coalbed methane have a significant effect on gas production of coalbed methane wells.

关键词： pressure relief coalbed methane exploitation vertical surface well Huainan coal mining area

Bistable switch molecule DPACdCl_(4) showing four physical channels and high phase transition temperature

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Chinese Chemical Letters 2025年第1期36卷 591-596页

作者： Ying-Yu zhang jia-Qi Luo Yan han Wan-Ying zhang Yi zhang Hai-Feng Lu Da-Wei Fu Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and applications of Molecular FerroelectricsSoutheast UniversityNanjing 211189China

Multiple switchable physical channels within one material or device,encompassing optical,electrical,thermal,and mechanical pathways,can enable multifunctionality in mechanical-thermal-opto-electronic *** integrated encryption and enhanced performance in storage and sensing presents a formidable challenge in the synthesis and functionality of new *** an effort to overcome the complexities associated with these multiple physical functions,this study investigates the large-size crystal of DPACdCl_(4)(DPA=diisopropylammonium),revealing significant features in rare multi-channel *** compound demonstrates the ability to switch between"OFF/0"and"ON/1"states in the mechanical-thermal-opto-electronic ***,DPACd Cl_(4)possesses four switchable physical channels,characterized by a higher phase transition temperature of 440.7 K and a competitive piezo-electric coefficient of 46 pC/***,solid-state NMR analysis indicates that thermally activated molecular vibrations significantly contribute to its multifunctional switching capabilities.

关键词： Organic-inorganic hybrid Phase transition Crystal Perovskite Piezoelectricity

New paradigms of water-enabled electrical energy generation

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SusMat 2024年第3期4卷 73-103页

作者： Zhengtong Li Tao Yang jia-han zhang Taotao Meng Saad Melhi Jungmok You Miharu Eguchi Likun Pan Yusuke Yamauchi Xingtao Xu The National Key Laboratory ofWater Disaster Prevention Yangtze Institute for Conservation and DevelopmentState Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHohai UniversityNanjingChina School of Electronic Information Engineering Inner Mongolia UniversityHohhotChina Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjingChina College of Materials Science and Engineering Nanjing Forestry UniversityNanjingChina Department of Chemistry College of ScienceUniversity of BishaBishaSaudi Arabia Department of Plant&Environmental New Resources College of Life SciencesKyung Hee UniversityYongin-siGyeonggi-doSouth Korea Department of Applied Chemistry School of Advanced Science and EngineeringWaseda UniversityShinjuku-kuTokyoJapan Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghaiChina School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQueenslandAustralia Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityNagoyaJapan Marine Science and Technology College Zhejiang Ocean UniversityZhoushanZhejiangChina

Nanotechnology-inspired small-sized water-enabled electricity generation(WEG)has sparked widespread research interest,especially when applied as an electricity source for off-grid low-power electronic equipment and ***,WEG encompasses a wide range of physical phenomena,generator structures,and power generation ***,a systematic framework to clearly describe the connections and differences between these technologies is *** this review,a comprehensive overview of generator technologies and the typical mechanisms for harvesting water energy is *** the different roles of water inWEG processes,the related technologies are presented as two different ***,a detailed analysis of the electrical potential formation in each WEG process is presented,and their similarities and differences are ***,a comprehensive compilation of advanced generator architectures and system designs based on hydrological cycle processes is presented,along with their respective energy *** nanotechnology-inspired small-sized WEG devices show considerable potential for applications in the Internet of Things ecosystem(i.e.,microelectronic devices,integrated circuits,and smart clothing).Finally,the prospects and future challenges of WEG devices are also summarized.

关键词： electricity generation mechanisms Internet of Things multi-angle generator systems smallsized generators water-enabled electricity generation

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 144-151页

作者： Yunhan Yang han jia Tuo Liu Yuzhen Yang Jun Yang Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China

The phenomenon of induced transparency,characterized by a high quality(Q)factor,holds significant importance in the fields of high-precision sensing,energy storage and wave *** transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters,thereby hindering advanced research on high-Q *** we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection *** virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom,we achieve the manipulation of induced transparency in a decoupled,wide-ranging,and elaborate *** the diverse evolutions across the intrinsic parameter space,we show experimentally a counter-intuitive increase in the Q-factor of the transparency window,which is attributed to the enhanced dissipation of the bright ***,a constant group delay at the center frequency is observed accompanying this *** work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon,and paves the way towards applications in programmable acoustic sensors,filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

Multi‐vital on‐skin optoelectronic biosensor for assessing regional tissue hemodynamics

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SmartMat 2023年第3期4卷 84-95页

作者： Ming Xin Tong Yu Yongchang jiang Ruowen Tao Jiean Li Feng Ran Tangsong Zhu Jinrong Huang Jing zhang jia‐han zhang Nan Hu Wei Wang Qiuhong zhang Zhao Liu Xinran Wang Yi Shi Lijia Pan Collaborative Innovation Center of Advanced Microstructures Jiangsu Provincial Key Laboratory of Photonic and Electronic MaterialsSchool of Electronic Science and EngineeringNanjing UniversityNanjingChina Department of Vascular Surgery Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjingChina Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina

Evaluation of the oxygen‐mediated effects of clinical and daily activities demands an on‐skin device that can track multi‐vital regional tissue hemodynamics *** example,peripheral arterial disease(PAD)is the third most prevalent cardiovascular disease,but the means of diagnosing and monitoring this disease are limited because the affected area is usually in the non‐pulsatile area away from the ***,we report on an ultrathin and ultralight multi‐vital near‐infrared optoelectronic biosensor for the diagnosis and rehabilitation monitoring of regional tissue hemodynamics,which is suitable for mounting on the skin for long‐term *** device can simultaneously detect tissue oxygen saturation,heart rate,arterial blood oxygen,and tissue perfusion and shows potential for various hypoxia monitoring ***,the tissue hemodynamics detected by this device showed a highly accordance with the ankle‐brachial index and CT angiography obtained by traditional clinical ***,our design was able to accurately diagnose and effectively evaluate PAD patients before and after *** on‐skin optoelectronic biosensor shows potential in biological oxygen‐mediated behavior evaluation,injury‐state monitoring,PAD clinical diagnosis optimization,and after surgery care.

关键词： biosensor cardiovascular disease flexible electronics skin inspired electronics

Carbon nanostructures produced through ion irradiation

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Nuclear Science and Techniques 2003年第2期14卷 107-114页

作者： YU Li-Ping, WANG Zhen-Xia, ZHU Zhi-Yuan, zhang Hu-Yong, han jia-Guang, zhang Wei, SUN Li-Tao,WANG Ting-Tai, MA Yu-Gang (Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800) Shanghai Institute of Nuclear Research the Chinese Academy of Sciences 上海 201800

Several nanostructures we produced by ion irradiation have been reviewed in this paper. By using ions to irradiate two ultrahigh molecular weight polyethylene targets respectively, it was found that small fullerenes C20 and C26 were grown, adding two members to the fullerene family. Meanwhile, crystalline diamonds also have been produced by Ar+ ions irradiation of graphite. In the experiment of double ions Ni+ and Ar+ irradiation, nanoscale argon bubbles formed. On the other side, when multi-wall carbon nanotubes were irradiated by C+, many MWCNTs evolved to amorphous carbon nanowires and amorphous carbon nanotubes. And there are possible welding in the crossed nanotubes.

关键词：碳纳米结构离子辐射聚乙烯

Gradient age-precipitation behavior induced by gradient nano-grain in Mg-Gd-Ag-Zr alloy

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Journal of Iron and Steel Research International 2025年第1期32卷 19-24页

作者： Bang-jun Li jia-peng Sun Jing han Guo-song Wu College of Materials Science and Engineering Hohai UniversityNanjing 210024JiangsuChina School of Mechanical and Electrical Engineering China University of Mining and TechnologyXuzhou 221116JiangsuChina

Gradient nano-grained structure is frequently engineered into metallic materials,including Mg alloys,to achieve superior combination of strength and ***,the influence of this microstructural feature on aging precipitation behavior remains inadequately *** this study,the age-precipitation behavior of a gradient nano-grained Mg-Gd-Ag-Zr alloy prepared via ultrasonic severe surface rolling was *** result indicates that the aging precipitation behavior exhibits a depth-dependent variation within this *** the nano-grained surface layer,hierarchicalβnano-precipitates are predominant,while at greater depths,the precipitates consist ofβnanoparticles located at grain boundaries,along with intragranularβ′andγ″*** formation ofβnano-precipitates deviates from the conventional precipitation behavior observed in Mg-Gd-Ag alloys,and is attributed to the high density of defects induced by the surface nano-grained *** finding advances our understanding of the precipitation behavior in the alloys with heterogeneous microstructure.

关键词： Mg alloy Gradient Precipitation Aging behavior Microstructure

Benchmark Datasets for Fluid Flow Analysis

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 365-379页

作者： Wenhao jia Tao Ding Ouzhu han Chenggang Mu Hongji zhang Department of Electrical Engineering Xi'an Jiaotong UniversityXi'anShaanxi710049China

Fluid flow analysis, such as gas flow analysis, water flow analysis, etc., is a fundamental problem in integrated energy systems (IES). Datasets are significant for researchers to test their proposed models and algorithms for fluid flow analysis. In this paper, we provide multiple benchmark datasets of fluid systems with detailed topology and operation information, such as data of fluid supply, fluid demand, pipes, valves, compressors/pumps, physical operation limits, etc. The provided benchmark datasets have synthetic and practical fluid systems of different scales, including gas systems with numbers of nodes ranging from 11 to 4197 and water systems with numbers of nodes ranging from 7 to 1894. Then, the data format of the datasets is described. Finally, fluid flow results on different benchmark systems under several typical scenarios are analyzed.

关键词： Benchmark systems dataset fluid flow analysis gas systems water systems