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Building Hot Snapshot Copy Based on Windows File System

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1503-1506页

作者： wang Lina GUO Chi wang Dejun zhu qin School of Compuler Wuhan University Wuhan 430072 Hubei China

This paper describes a method for building hot snapshot copy based on windows-file system （HSCF）. The architecture and running mechanism of HSCF are discussed after giving a comparison with other on-line backup tecbnology. HSCF, based on a file system filter driver, protects computer data and ensures their integrity and consistency with following three steps： access to open files, synchronization and copy on-write. Its strategies for improving system performance are analyzed including priority setting, incremental snapshot and load balance. HSCF is a new kind of snapshot technology to solve the data integrity and consistency problem in online backup, which is different from other storage-level snapshot and Open File Solution.

关键词： snapshot backup and recovery windows file system filter driver data integrity and consistency

Asian Journal of Andrology is advancing towards a bright future

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Asian Journal of Andrology 2010年第1期12卷 5-6页

作者： Yi-Fei wang qin-zhu Zheng Dan-qing Ren Hui Zhang Ling-Yan Ji Rong-Rong Ma Asian Journal of Andrology Room 302 Building 16 294 Tai-Yuan Road Shanghai 200031 China

As time quickly passes, we once again have the opportunity to wave goodbye to last year and welcome the New Year. This is also an ideal point at which to reflect on the past and envision a brighter future for Asian Jo... 详细信息

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Fe_(2)TiO_(5)nanochains as anode for high-performance lithium-ion capacitor

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Rare Metals 2021年第9期40卷 2424-2431页

作者： Rong Kang wang-qin zhu Sheng Li Bo-Bo Zou Liao-Liao wang Guo-Chun Li Xian-Hu Liu Dickon H.L.Ng Jing-Xia Qiu Yan Zhao Fen Qiao Jia-Biao Lian Key Laboratory of Zhenjiang Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Physics The Chinese University of Hong KongShatinHong Kong 999077China

The unique crystal structure and multiple redox couples of iron titanate(Fe_(2)TiO_(5)) provide it a high theoretical capacity and good cycling stability when used as an electrode. In this study, the electrospinning method is employed to synthesize one-dimensional(1 D) Fe_(2)TiO_(5) nanochains. The as-prepared Fe_(2)TiO_(5) nanochains exhibited superior specific capacity(500 mAh·g^(-1) at 0.10 A·g^(-1)),excellent rate performance(180 mAh·g^(-1) at 5.00 A·g^(-1)),and good cycling stability(retaining 100% of the initial specific capacity at a current density of 1.00 A·g^(-1) after1000 cycles). The as-assembled Fe_(2)TiO_(5)/SCCB lithiumion capacitor(LIC) also delivered a competitive energy density(137.8 Wh·kg^(-1))andpowerdensity(11,250 W·kg^(-1)). This study proves that the as-fabricated1 D Fe_(2)TiO_(5) nanochains are promising anode materials for high-performance LICs.

关键词： Lithium-ion capacitors High energy/power densities Anode material Fe_(2)TiO_(5)nanochains Electrospinning

Spin-selective and frequency-shift meta-holography based on reconfigurable origami chiral metasurface

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 121-131页

作者： Zhibiao zhu Lixin Jiang Zhe qin Yongfeng Li Jiafu wang Yuxiang Jia Lin Zheng Shaobo Qu Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering UniversityXi’an710051China

Origami-based reconfigurable metasurfaces have emerged as a versatile paradigm for dynamically manipulating electromagnetic(EM) waves due to their advantages, such as low manufacturing cost, lightweight, and structural deformability. Three-dimensional(3D) deformation can intensify asymmetry among structures, making origami metasurfaces particularly suitable for realizing reconfigurable chiral responses. However, previous studies have primarily focused on modulating spectral properties,such as chiral switching and resonant frequency shifting. There remains ample room for further exploration in complex wavefront manipulation and holographic imaging applications. This paper proposes a simple and efficient deformation method for origami metasurfaces that transforms a spin-insensitive planar metasurface into a 3D metasurface by folding. The breaking of mirror symmetry induces a pronounced chiral response. The binary amplitude is modulated within each pixel. When folded at angles of +θ and-θ, the designed origami metasurface generates distinct images under left-handed circularly polarized(LCP)wave incidence. Meanwhile, holographic encryption is achieved under right-handed circularly polarized(RCP) wave ***, by leveraging origami's reconfigurability, the holographic imaging's operating frequency can be shifted. The experimental results agree well with the numerical calculations and full-wave simulations, demonstrating the broad application potential of this method in areas such as multi-channel imaging, information encryption technologies, and stealth.

关键词： hologram origami metasurface chiral response

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Hierarchically Porous Polypyrrole Foams Contained Ordered Polypyrrole Nanowire Arrays for Multifunctional Electromagnetic Interference Shielding and Dynamic Infrared Stealth

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Nano-Micro Letters 2025年第4期17卷 399-418页

作者： Yu-long Liu Ting-yu zhu qin wang Zi-jie Huang De-xiang Sun Jing-hui Yang Xiao-dong Qi Yong wang School of Chemistry Key Laboratory of Advanced Technologies of Materials(Ministry of Education)Southwest Jiaotong UniversityChengdu 610031People’s Republic of China

As modern communication and detection technologies advance at a swift pace,multifunctional electromagnetic interference(EMI)shielding materials with active/positive infrared stealth,hydrophobicity,and electric-thermal conversion ability have received extensive *** the aforesaid requirements simultaneously remains a huge *** this research,the melamine foam(MF)/polypyrrole(PPy)nanowire arrays(MF@PPy)were fabricated via one-step electrochemical *** hierarchical MF@PPy foam was composed of three-dimensional PPy micro-skeleton and ordered PPy nanowire *** to the upwardly grown PPy nanowire arrays,the MF@PPy foam possessed good hydrophobicity ability with a water contact angle of 142.00°and outstanding stability under various harsh ***,the MF@PPy foam showed excellent thermal insulation property on account of the low thermal conductivity and elongated ligament characteristic of PPy nanowire ***,taking advantage of the high conductivity(128.2 S m^(-1)),the MF@PPy foam exhibited rapid Joule heating under 3 V,resulting in dynamic infrared stealth and thermal camouflage *** importantly,the MF@PPy foam exhibited remarkable EMI shielding effectiveness values of 55.77 dB and 19,928.57 dB cm^(2)g^(-1).Strong EMI shielding was put down to the hierarchically porous PPy structure,which offered outstanding impedance matching,conduction loss,and multiple *** innovative approach provides significant insights to the development of advanced multifunctional EMI shielding foams by constructing PPy nanowire arrays,showing great applications in both military and civilian fields.

关键词： Polypyrrole nanowire arrays Hierarchical foam Hydrophobicity Infrared stealth Electromagnetic interference shielding

Omnidirectional simulation analysis of thermomechanical coupling mechanism in inertia friction welding of Ni-based superalloy

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Chinese Journal of Aeronautics 2025年第1期38卷 202-216页

作者： Chang-an LI Guoliang qin Hao wang School of Materials Science and Engineering Shandong UniversityJinan 250061China

The coupling between heat and pressure is the kernel of inertia friction welding(IFW)and is still not fully understood.A novel 3D fully coupled finite element model based on a plastic friction pair was developed to simulate the IFW process of a Ni-based superalloy and reveal the omnidirectional thermo-mechanical coupling mechanism of the friction *** numerical model successfully simulated the deceleration,deformation processes,and peak torsional moments in IFW and captured the evolution of temperature,contact pressure,and *** simulated results were validated through measured thermal history,optical macrography,and axial *** results indicated that interfacial friction heat was the primary heat source,and plastic deformation energy only accounted for 4%of the *** increase in initial rotational speed and friction pressure elevated the peak temperature,reaching a maximum of 1525.5K at an initial rotational speed of 2000 r/min and friction pressure of 400 *** interface heat generation could form an axial temperature gradient exceeding 320K/*** radial inhomogeneities of heat generation and temperature were manifested in a concentric ring distribution with maximum heat flux and temperature ranging from 2/5 to 2/3 *** radial inhomogeneities were caused by increasing linear velocity along the radius and an opposite distribution of contact pressure,which could reach 1.7 times the set pressure at the *** circumferential inhomogeneity of thermomechanical distribution during rotary friction welding was revealed for the first time,benefiting from the 3D *** deflection and transformation of distribution in contact pressure and Mises stress were indicators of plastic deformation and transition of quasi-steady state *** critical Mises stress was 0.5 times the friction pressure in this *** presented modeling provides a reliable insight into the thermo-mechanical coupling mechanism of IFW and lays a solid found

关键词： Inertia friction welding Thermo-mechanical coupling Inhomogeneity Numerical simulation Ni-based superalloy

Rainfall impacts on nonpoint nitrogen and phosphorus dynamics in an agricultural river in subtropical montane reservoir region of southeast China

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Journal of Environmental Sciences 2025年第3期149卷 551-563页

作者： Yuanyi wang Hai Xu Xingchen Zhao Lijuan Kang Yu Qiu Hans Paerl Guangwei zhu Huiyun Li Mengyuan zhu Boqiang qin Yunlin Zhang Mingliang Liu Key Laboratory of Lake and Watershed Science for Water Security Nanjing Institute of Geography&LimnologyChinese Academy of SciencesNanjing 210008China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Institute of Marine Sciences University of North Carolina at Chapel HillNC 28557USA Hangzhou Institute of Ecological and Environmental Sciences Hangzhou 310005China

The increased frequency and intensity of heavy rainfall events due to climate change could potentially influence the movement of nutrients from land-based regions into recipient ***,little information is available on how the rainfall affect nutrient dynamics in subtropicalmontane rivers with complex land *** study conducted high-frequency monitoring to study the effects of rainfall on nutrients dynamics in an agricultural river draining to Lake Qiandaohu,a montane reservoir of southeast *** results showed that riverine total nitrogen(TN)and total phosphorus(TP)concentrations increased continuously with increasing rainfall intensity,while TN:TP *** heavy rainfall and rainstorm drove more than 30%of the annual N and P loading in only 5.20%of the total rainfall period,indicating that increased storm runoff is likely to exacerbate eutrophication in montane ***_(3)^(−)-N is the primary nitrogen form lost,while particulate phosphorus(PP)dominated phosphorus *** source of N is cropland,and themain source of P is residential ***,forestedwatersheds have better drainage quality,while it is still a potential source of nonpoint pollution during rainfall *** and TP concentrations were significantly higher at sites dominated by cropland and residential area,indicating their substantial contributions to deteriorating river water ***,TN and TP concentrations reached high values in May-August when rainfall was most intense,while they were lower in autumn and winter than that in spring and summer under the same rainfall *** results emphasize the influence of rainfall-runoff and land use on dynamics of riverine N and P loads,providing guidance for nutrient load reduction planning for Lake Qiandaohu.

关键词： Non-point source pollution Rainfall events Land use type Mountain area Deepwater reservoir

Polyvinyl alcohol fiber with enhanced strength and modulus and intense cyan fluorescence based on covalently functionalized graphene quantum dots

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Chinese Chemical Letters 2025年第2期36卷 250-255页

作者： Manman Ou Yunjian zhu Jiahao Liu Zhaoxuan Liu Jianjun wang Jun Sun Chuanxiang qin Lixing Dai College of Chemistry Chemical Engineering and Materials Science Soochow University

In this study, we proposed a novel and efficient way to strengthen polyvinyl alcohol(PVA) fiber using graphene quantum dots(GQDs). PVA molecular chains were grafted onto the surface of GQDs through Friedel-Crafts alkylation reaction to obtain functionalized GQDs(f-GQDs), and PVA/f-GQDs composite fiber was successfully prepared by wet spinning and post-treatment. The tensile strength and Young's modulus of the composite fiber reached up to 1229.24 MPa and 35.36 GPa which were approximately twice and 4 times those of the pure PVA fiber, respectively. Moreover, the composite fiber was demonstrated excellent resistance to solvents. In addition, the PVA/f-GQDs composite fiber showed intense and uniform cyan fluorescence, meanwhile, it could maintain stable solid-state fluorescence in acid and alkali solutions and particularly after long-term immersion in water(1 month). This study proposes a promising route for obtaining high-performance conventional fibers with some new functions.

关键词： Enhancement Fluorescence Graphene quantum dots Polyvinyl alcohol fiber

Spatial Pattern and Influencing Factors of China’s Digital Trade Resilience under the Impact of Trade Frictions

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Chinese Geographical Science 2025年第1期35卷 203-216页

作者： LI Chunli zhu Huayou BAO Weiping qin Manman School of E-Commerce Yiwu Industrial and Commercial CollegeJinhua 322000China College of Economics and Management Zhejiang Normal UniversityJinhua 321004China

In the era of the digital economy,digital trade has demonstrated strong vitality,becoming a crucial driving force for the highquality development of national and regional ***,understanding the resilience of digital trade in the face of external crises is an important *** the backdrop of Sino-US trade friction,this paper constructs a resilience index system for digital *** utilizes entropy method,kernel density estimation,and ArcGIS mapping to calculate and visually analyze the resilience of China’s digital trade from 2017 to ***,a Tobit model is constructed to explore the main influencing factors of digital trade resilience *** research findings indicate:1)temporally,during the period of Sino-US trade friction,China’s digital trade resilience shows an overall upward trend,but there are regional differences in resilience levels across the country,with a severe polarization phenomenon.2)Spatially,high resilience is observed in the eastern and central regions of China,while the western and northeastern regions exhibit low resilience.3)From a dimensional perspective,the resistance of digital trade resilience displays a spatial distribution of high values in the east and low values in the *** recovery force is aggregated along coastal areas,and the renewal force tends to aggregate along the eastern coastline.4)Factors such as economic scale,industrial structure,urbanization rate,government fiscal expenditure,and technological talents significantly promote the enhancement of digital trade *** study reveals the dynamic characteristics and influencing factors of digital trade resilience in responding to external shocks,providing theoretical basis and policy suggestions for enhancing digital trade resilience,and promoting high-quality economic development in China.

关键词： digital trade resilience trade friction resilience pattern resilience factors China

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