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Compressive properties of a novel slurry-infiltrated fiber concrete reinforced with arc-shaped steel fibers

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第6期24卷 543-556页

作者： Hedong LI yabiao LI yunfeng pan P.L.ng Christopher K.y.LEUng Xin ZHAO School of Civil Engineering and Architecture Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Civil Engineering The University of Hong KongHong Kong 999077China Faculty of Civil Engineering Vilnius Gediminas Technical UniversityVilnius LT-10223Lithuania Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China School of Civil Engineering and Architecture Zhejiang University of Science and TechnologyHangzhou 310023China

Slurry-infiltrated fiber concrete(SIFCON)is a sort of strain hardening cement-based composite material,typically made with 5%–20%steel *** study focused on a novel type of SIFCON in which hooked-end steel fibers were replaced by arc-shaped steel *** quasi-static compressive properties of the SIFCON were first *** results suggested that using arc-shaped steel fibers in lieu of hooked-end steel fibers increased the quasi-static compressive strength by 47.1%and the strain at peak stress by 56.3%.We attribute these improvements to new crack-resisting mechanisms,namely“fiber crosslock”,“dual bridging”,and“confinement loops”,when the arc-shaped steel fibers are introduced into *** high impact resistance is a special property of SIFCON that is of practical significance,the dynamic compressive properties of arc-shaped steel fiber SIFCON were studied by using an 80-mm-diameter split Hopkinson pressure bar(SHPB).The results showed that the dynamic compressive strength,dynamic increase factor(DIF),and dynamic toughness of SIFCON all increased with the strain *** SIFCON incorporating arc-shaped steel fibers proved to have significant advantages in structural applications requiring high impact resistance.

关键词： Slurry-infiltrated fiber concrete(SIFCON) Arc-shaped steel fiber Quasi-static compressive properties Spilt Hopkinson pressure bar(SHPB) Dynamic compressive properties

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Artificial cilia for soft and stable surface covalent immobilization of bone morphogenetic protein-2

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Bioactive Materials 2023年第6期24卷 551-562页

作者： Qi Gan Lina Chen Ho-pan Bei Sze-Wing ng Han Guo Guoqiang liu Hao pan Changsheng liu Xin Zhao Zijian Zheng Laboratory for Advanced Interfacial Materials and Devices School of Fashion and TextilesThe Hong Kong Polytechnic UniversityKowloon99077Hong Kong Special Administrative Region of China Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237PR China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong Special Administrative Region of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204PR China Department of Applied Biology and Chemical Technology Faculty of ScienceThe Hong Kong Polytechnic UniversityKowloon99077Hong Kong Special Administrative Region of China

Preservation of growth factor sensitivity and bioactivity(e.g.,bone morphogenetic protein-2(BMP-2))post-immobilization to tissue engineering scaffolds remains a great ***,we develop a stable and soft surface modification strategy to address this ***-2(a model growth factor)is covalently immobilized onto homogeneous poly(glycidyl methacrylate)(PGMA)polymer brushes which are grafted onto substrate surfaces(Au,quartz glass,silica wafer,or common biomaterials)via surface-initiated atom transfer radical *** surface modification method multiplies the functionalized interfacial area;it is simple,fast,gentle,and has little effect on the loaded protein owing to the cilia *** immobilized BMP-2(i-BMP-2)on the surface of homogeneous PGMA polymer brushes exhibits excellent bioactivity(-87%bioactivity of free BMP-2 in vitro and 20%-50%higher than scaffolds with free BMP-2 in vivo),with conformation and secondary structure well-preserved after covalent immobilization and ethanol ***,the osteogenic activity of i-BMP-2 on the nanoline pattern(PGMA-poly(N-isopropylacrylamide))shows-110%bioactivity of free *** is superior compared to conventional protein covalent immobilization strategies in terms of both bioactivity preservation and therapeutic *** polymer brushes can be used to modify surfaces of different tissue-engineered scaffolds,which facilitates in situ immobilization of growth factors,and accelerates repair of a wide range of tissue types.

关键词： Polymer brush Poly(glycidyl methacrylate) Surface modification Protein immobilization Bioactivity

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Prediction of the Atomic Electron Affinities Using a Wavelet Neural Network

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Chinese Chemical Letters 1998年第2期9卷 203-206页

作者： liu, L Shao, XG Cai, WS Jiang, y pan, ZX Univ Sci & Technol China Dept Chem Hefei 230026 Peoples R China Univ Sci & Technol China Dept Appl Chem Hefei 230026 Peoples R China Univ Sci & Technol China Dept Phys Hefei 230026 Peoples R China

Wavelet Neural Network (WNN) was employed in a rapid calculation of the atomic electron affinities, with atomic ionization potentials and atomic electron configurations chosen as input parameters. Many unmeasured valu... 详细信息

关键词： Wavelet Neural Network (WNN) atomic electron affinities

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Decoupling effect and driving factors of carbon footprint in megacity Wuhan,Central China

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Ecological Processes 2023年第1期12卷 330-343页

作者： Gao pan Xinhang Li Deng pan Wensheng liu College of Life Science and Technology Central South University of Forestry and TechnologyChangsha 410004People’s Republic of China Central South Academy of Inventory and Planning of NFGA Changsha 410014People’s Republic of China

Background China’s 35 largest cities,including Wuhan,are inhabited by approximately 18%of the Chinese popula-tion,and account for 40%energy consumption and greenhouse gas *** is the only sub-provincial city in Central China and,as the eighth largest economy nationwide,has experienced a notable increase in energy ***,major knowledge gaps exist in understanding the nexus of economic development and carbon footprint and their drivers in *** We studied Wuhan for the evolutionary characteristics of its carbon footprint(CF),the decoupling relation-ship between economic development and CF,and the essential drivers of *** on the CF model,we quantified the dynamic trends of CF,carbon carry.ng capacity,carbon deficit,and carbon deficit pressure index from 2001 to *** also adopted a decoupling model to clarify the coupled dynamics among total CF,its accounts,and eco-nomic *** used the partial least squares method to analyze the influencing factors of Wuhan’s CF and determine the main *** The CF of Wuhan increased from 36.01 million t CO_(2)eq in 2001 to 70.07 million t CO_(2)eq in 2020,a growth rate of 94.61%,which was much faster than that of the carbon carry.ng *** energy consumption account(84.15%)far exceeded other accounts,and was mostly contributed by raw coal,coke,and crude *** carbon deficit pressure index fluctuated in the range of 8.44-6.74%,indicating that Wuhan was in the relief zone and the mild enhancement zone during *** the same time,Wuhan was in a transition stage between weak and strong CF decoupling and economic *** main driving factor of CF growth was the urban per capita residen-tial building area,while energy consumption per unit of GDP was responsible for the CF *** Our research highlights the interaction of urban ecological and economic systems,and that Wuhan’s CF changes were mainly affected by four factors:city size,economic developm

关键词： Carbon footprint Economic development Decoupling analysis Partial least squares analysis Megacity

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A transcription assay for EWS oncoproteins in Xenopus oocytes

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Protein & Cell 2010年第10期1卷 927-934页

作者： King pan ng Felix Cheung Kevin A.W.Lee Department of Biology The Hong Kong University of Science and TechnologyClear Water BayKowloon Hong KongChina

Aberrant chromosomal fusion of the Ewing's sarcoma oncogene(EWS)to several different cellular partners produces the Ewing's family of oncoproteins(EWSfusion-proteins,EFPs)and associated tumors(EFTs).EFPs are potent transcriptional activators,dependent on the N-terminal region of EWS(the EWS-activationdomain,EAD)and this function is thought to be central to EFT oncogenesis and *** EFPs are promising therapeutic targets,but detailed molecular studies will be pivotal for exploring this *** studies have so far largely been restricted to intact mammalian cells while recent evidence has indicated that a mammalian cell-free transcription system may not support bona fide EAD ***,the lack of manipulatable assays for the EAD presents a significant barrier to *** Xenopus laevis oocytes we describe a plasmid-based micro-injection assay that supports efficient,bona fide EAD transcriptional activity and hence provides a new vehicle for molecular dissection of the EAD.

关键词： EWS/ATF1 Ewing's sarcoma microinjection Xenopus oocytes transcription EWS-activation domain

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Einstein Probe discovery of EP240408a: A peculiar X-ray transient with an intermediate timescale

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 222-240页

作者： Wenda Zhang Weimin yuan Zhixing Ling y.ng Chen Nanda Rea Arne Rau Zhiming Cai Huaqing Cheng Francesco Coti Zelati Lixin Dai Jingwei Hu Shumei Jia Chichuan Jin Dongyue Li Paul O’Brien Rongfeng Shen Xinwen Shu Shengli Sun Xiaojin Sun Xiaofeng Wang Lei y.ng Bing Zhang Chen Zhang Shuang-Nan Zhang y.nghe Zhang Jie An David Buckley Alexis Coleiro Bertrand Cordier Liming Dou Rob Eyles-Ferris Zhou Fan Hua Feng Shaoyu Fu Johan P.U.Fynbo Lluis Galbany Saurabh W.Jha Shuaiqing Jiang Albert Kong Erik Kuulkers Weihua Lei Wenxiong Li Bifang liu Mingjun liu Xing liu yuan liu Zhu liu Chandreyee Maitra Alessio Marino Itumeleng Monageng Kirpal Nandra Jeremy Sanders Roberto Soria Lian Tao Junfeng Wang Song Wang Tinggui Wang Zhongxiang Wang Qingwen Wu Xuefeng Wu Dong Xu yanjun Xu Suijian Xue y.ngquan Xue Zijian Zhang Zipei Zhu Hu Zou Congy.ng Bao Fansheng Chen Houlei Chen Tianxiang Chen Wei Chen yehai Chen yifan Chen Chenzhou Cui Weiwei Cui yanfeng Dai Dongwei Fan Ju Guan Dawei Han Dongjie Hou Haibo Hu Maohai Huang Jia Huo Zhenqing Jia Bowen Jiang Ge Jin Chengkui Li Junfei Li Longhui Li Maoshun Li Wei Li Zhengda Li Tiany.ng Lian Congzhan liu Hey.ng liu Huaqiu liu Fangjun Lu Laidan Luo Jia Ma Xuan Mao Haiwu pan Xin pan Liming Song Hui Sun yunyin Tan Qingjun Tang yihan Tao Hao Wang Juan Wang Lei Wang Wenxin Wang yilong Wang yusa Wang Qinyu Wu Haitao Xu Jingjing Xu Xinpeng Xu yunfei Xu Zhao Xu Changbin Xue yulong Xue Ailiang yan Haonan y.ng Xiongtao y.ng yanji y.ng Juan Zhang Mo Zhang Wenjie Zhang Zhen Zhang Zhen Zhang Ziliang Zhang Donghua Zhao Haisheng Zhao Xiaofan Zhao Zijian Zhao Hongyan Zhou yilin Zhou yuxuan Zhu Zhencai Zhu National Astronomical Observatories Chinese Academy of Sciences School of Astronomy and Space Sciences University of Chinese Academy of Sciences Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Institute of Space Sciences (ICE) CSIC Institut d’Estudis Espacials de Catalunya (IEEC) Max Planck Institute for Extraterrestrial Physics Innovation Academy for Microsatellites Chinese Academy of Sciences Department of Physics University of Hong Kong School of Physics and Astronomy University of Leicester School of Physics and Astronomy Sun yat-sen University Department of Physics Anhui Normal University Shanghai Institute of Technical Physics Chinese Academy of Sciences Physics Department Tsinghua University Nevada Center for Astrophysics University of Nevada Las Vegas Department of Physics and Astronomy University of Nevada Las Vegas South African Astronomical Observatory Department of Astronomy University of Cape Town Department of Physics University of the Free State Université Paris Cité CNRS Astroparticule et Cosmologie Université Paris Cité CEA Paris-Saclay IRFU/DAp-AIM Department of Astronomy Guangzhou University Cosmic Dawn Center (DAWN) Niels Bohr Institute University of Copenhagen Department of Physics and Astronomy Rutgers the State University of New Jersey Institute for Cosmic Ray Research The University of Tokyo ESA/ESTEC Department of Astronomy School of Physics Huazhong University of Science and Technology INAF-Osservatorio Astrofisico di Torino Sydney Institute for Astronomy School of Physics The University of Sydney Department of Astronomy Xiamen University Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Department of Astronomy University of Science and Technology School of Astronomy and Space Sciences University of Science and Technology of China Institute of Deep Space Sciences Deep Space Exploration Laboratory Department of Astronomy School of Physics and Astronomy yunnan University Shanghai Astronomical Observatory Chi

We report the discovery of a peculiar X-ray transient,EP240408a,by Einstein Probe （EP） and follow-up studies made with EP,Swift,NICER,GROND,ATCA and other ground-based multiwavelength *** new transient was first detected with Wide-field X-ray Telescope （WXT） on board EP on April 8th,2024,manifested in an intense yet brief X-ray flare lasting for *** flare reached a peak flux of 3.9×10-9erg cm-2s-1in 0.5-4 ke V,～300 times brighter than the underly.ng X-ray emission detected throughout the *** and more precise follow-up observations by EP/FXT,Swift and NICER confirmed the finding of this new *** X-ray spectrum is non-thermal in 0.5-10 ke V,with a power-law photon index vary.ng *** X-ray light curve shows a plateau lasting for ～4 d,followed by a steep decay till becoming undetectable ～10 d after the initial *** on its temporal property and constraints from previous EP observations,an unusual timescale in the range of 7-23 d is found for EP240408a,which is intermediate between the commonly found fast and long-term *** counterparts have been found in optical and near-infrared,with the earliest observation at 17 h after the initial X-ray detection,suggestive of intrinsically weak emission in these *** demonstrate that the remarkable properties of EP240408a are inconsistent with any of the transient types known so far,by comparison with,in particular,jetted tidal disruption events,gamma-ray bursts,X-ray binaries and fast blue optical *** nature of EP240408a thus remains an *** suggest that EP240408a may represent a new type of transients with intermediate timescales of the order of～10 *** detection and follow-ups of more of such objects are essential for revealing their origin.

关键词： X-ray transients ${\bm~{Einstein~~Probe}}$

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A review on electromagnetic shielding magnesium alloys

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Journal of Magnesium and Alloys 2021年第6期9卷 1906-1921页

作者： Lizi liu Xianhua Chen Fusheng pan Chongqing Light Alloy Materials and Processing Engineering Technology Research Center Chongqing Three Gorges UniversityChongqing404130China College of Materials Science and Engineering Chongqing UniversityChongqing 400045China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400045China

Electromagnetic waves generated by electronic equipment are widely present in all living and working spaces because of the rapid development of electronic products and frequent use of digital *** shielding is an effective method of protection against these ***,the demand for materials with high electromagnetic shielding properties has remarkably ***(Mg)alloys,as potential electromagnetic shielding materials,have sparked great interest *** review highlights the effects of grain size,texture,alloy.ng elements and second phase on the shielding properties of Mg *** progress on the shielding properties of Mg–Zn,Mg–Al,Mg–RE and other new shielding Mg alloys is then summarised,and the successful design of Mg alloys with superior electromagnetic shielding properties,such as Mg–Zn–y–Ce–Zr,Mg–Sn–Zn–Ca–Ce,Mg–Gd–y–Zn–Zr and Mg-based composite materials,is ***,this review provides insights into the future development and applications of Mg alloys with superior shielding properties.

关键词： Magnesium alloys Electromagnetic shielding Mechanical properties Microstructure Influencing factors

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Fast rectangular matrix multiplication and some applications

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Science China Mathematics 2008年第3期51卷 389-406页

作者： Victor y pan Department of Mathematics and Computer Science.Lehman College City University of New York BronxNew York 10468 USA

We study asymptotically fast multiplication algorithms for matrix pairs of arbitrary dimensions, and optimize the exponents of their arithmetic complexity bounds. For a large class of input matrix pairs, we improve the known exponents. We also show some applications of our results: (i) we decrease from O(n 2 + n 1+o(1)logq) to O(n 1.9998 + n 1+o(1)logq) the known arithmetic complexity bound for the univariate polynomial factorization of degree n over a finite field with q elements; (ii) we decrease from 2.837 to 2.7945 the known exponent of the work and arithmetic processor bounds for fast deterministic (NC) parallel evaluation of the determinant, the characteristic polynomial, and the inverse of an n × n matrix, as well as for the solution to a nonsingular linear system of n equations; (iii) we decrease from O(m 1.575 n) to O(m 1.5356 n) the known bound for computing basic solutions to a linear programming problem with m constraints and n variables.

关键词： rectangular matrix multiplication asymptotic arithmetic complexity bilinear algorithm polynomial factorization over finite fields 68Q25 11y16

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High sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber

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Optoelectronics Letters 2025年

作者： CUI Nan pan Honggang ZHAng Ailing ZHAO Zihong CHEN Zhipan ZHAng Bo Tianjin Key Laboratory of Film Electronic and Communication Devices， Engineering Research Center of Optoelectronic Devices and Communication Technology， Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， we propose and numerically characterize the optical characteristics of a high sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber （PCF）. Four light transmission channels are constructed by using big air holes. The small rectangular air hole in the center of the fiber core is used to add asymmetry. We use gold plasma material to achieve better sensing performance. A thin film of TiO2is placed on the PCF surface， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor can reach 20000 nm/RIU in both x and y polarization modes. While the maximum wavelength resolution of the sensor is 5×10-6RIU. The average wavelength sensitivity reached 15900nm/RIU and 15800nm/RIU in x and y polarization mode. The sensor features R2=0.9969 / R2=0.9966 high linear performance in x and y polarization mode and the maximum FOM values 509.13 RIU-1/ 489.63 RIU-1in x and y polarization mode. Besides the sensor’s detection range is 1.26-1.36， which is a wide refractive index detection range. The sensor has a wide range of applications in biomedical and other fields.

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Vertical coherency function model of spatial ground motion

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Earthquake Engineering and Engineering Vibration 2011年第3期10卷 403-415页

作者： ye Jihong pan Jinlong liu Xianming Key Laboratory of Concrete and Pre-stressed Concrete Structure of Education Ministry Southeast Universi~ Nanjing 210096 China China Architecture Design and Research Group Beijing 100005 China

Many studies have focused on horizontal ground motion, resulting in many coherency functions for horizontal ground motion while neglecting related problems arising from vertical ground motion. However, seismic events have demonstrated that the vertical components of ground motion sometimes govern the ultimate failure of structures. In this paper, a vertical coherency function model of spatial ground motion is proposed based on the Hao model and SMART 1 array records, and the validity of the model is demonstrated. The vertical coherency function model of spatial ground motion is also compared with the horizontal coherency function model, indicating that neither model exhibits isotropic characteristics. The value of the vertical coherency function has little correlation with that of the horizontal coherency function. However, the coherence of the vertical ground motion between a pair of stations decreases with their projection distance and the frequency of the ground motion. When the projection distance in the wave direction is greater than 800 meters, the coherency between the two points can be neglected.

关键词： spatial ground motion vertical coherency model coherence law of vertical ground motion coherence law of horizontal ground motion

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