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SSRN 2022年

作者： Shi, Da Huang, Haonan Li, Ning Liu, Yiwei College of Civil Engineering and Architecture Zhejiang University 866 Yuhangtang Road Zhejiang Hangzhou310058 China School of Engineering University of Glasgow GlasgowG12 8LT United Kingdom Key Laboratory for Green and Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil Engineering Hunan University 410082 China

During the last three decades, laminated timber and bamboo have emerged as high-strength engineered wood products to improve performance of timber structures, and are being used as a replacement for some low-rise buildings made of concrete. Due to the fact that laminated timber and bamboo are relatively new engineered composite wood products, there is a lack of knowledge on the mechanical behavior of their members, especially the comparison of their performance. The goal of the present study is to characterize the monotonic and cyclic tensile axial behavior of bolted steel to laminated timber and bamboo (glubam) connections with slotted-in steel plates, and estimate their behavior in ultimate limit states. An experimental schedule was developed for 8 different configurations and 48 tests accounting for different test variables including materials (Laminated Veneer Lumber (LVL) and Glued Laminated Bamboo (glubam)), bolt number and diameter. The exerted force and displacement were recorded generating monotonic and hysteresis curves to assess the initial stiffness, yielding strength, ultimate strength, ductility, viscous damping, energy dissipation and failure mode of the connections. Moreover, an innovative numerical method by integrating Hill’s yielding criteria with element removal criteria for accurately predicting mechanical performance and fracture of bolted connections was proposed. The numerical simulation carried out on a FEM model have been consequently verified by experimental load-displacement curves and strain field measurements performed with Digital Image Correlation method. Finally, with the aid of FEM, a derivation was conducted to obtain the theoretical formulas of bolted connections stiffness. © 2022, The Authors. All rights reserved.

关键词： Finite element method

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Realization Restrain Vanadium Dissolution in Aqueous Zinc-Ion Batteries with Amphoteric Ionic Polyacrylamide Gel Electrolyte

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SSRN 2022年

作者： Liu, Menjie Qin, Mulan Fang, Guozhao Liang, Shuquan Wang, Xianyou Luo, Zhigao College of Chemistry Xiangtan University Xiangtan411105 China College of Materials and Chemical Engineering Hunan Institute of Engineering Xiangtan411104 China National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery National Base for International Science & Technology Cooperation Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education Xiangtan411105 China School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University Changsha410083 China

Layered vanadium-based materials (VBMs) cathode has attracted enormous interest as a prospective candidate for aqueous Zinc ion batteries (AZIBs). Whereas, the issues induced by dissolution of VBMs to electrolyte restrict the long cycle life of AZIBs. Herein, a polyacrylamide system’s gel electrolyte, poly acrylamide and 2-acrylamido-2-methylpropane sulfonic acid containing Zn2+ (referred as ZnPAM-AMPS) is synthesized by thermal polymerization. As-prepared gel electrolyte exhibits a high ionic conductivity of 10.7 mS cm-1, and high electrochemical stability window to 1.6 V. What’s more, the ZnPAM-AMPS enables Zn plating/stripping over 1900 h at 0.1 mA cm-2. The dissolution of VBMs was effectively suppressed by the low free water content of ZnPAM-AMPS, a dissolvable Zn/(NH4)2V4O9 cathode assembled battery with ZnPAM-AMPS demonstrate outstanding cycle life, which provides the innovative design for high performance AZIBs. © 2022, The Authors. All rights reserved.

关键词： Dissolution

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Research on the Properties and Mechanism of Graphene/Nano-Tio2 Composite Modified Asphalt

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SSRN 2021年

作者： Kezhen, Yan Kaixin, Shi Wang, Min Junyi, Shi Zhe, Hong Zheng, Chunmeng College of Civil Engineering Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan University Changsha410082 China College of Civil Engineering Northeast Forestry University Harbin150040 410082 China

In this paper, graphene was used to improve the dispersion of nano-TiO 2 in asphalt by preparing graphene and nano-TiO 2 composite modified asphalt with different dosages. The properties of nano-TiO 2 and graphene composite modified asphalt before and after short-term and long-term aging were analyzed by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test. The mechanism of nano-TiO 2 and graphene composite modified asphalt was studied by particle sizer and scanning electron microscopy (SEM). The results indicated that the incorporation of graphene and nano-TiO 2 increased the elastic properties and the deformation resistance of asphalt at high temperature, and the graphene and nano-TiO 2 could improve the short-term and long-term aging resistance of asphalt. At low temperature, the short-term and long-term aging resistance was improved by compounding graphene and nano-TiO 2 with asphalt to some extent. The optimum composite dosage is 1% nano-TiO 2 and 0.04% graphene for improving the properties of asphalt. The dispersion of nano-TiO 2 was improved effectively by incorporating graphene, and adding graphene into asphalt could reduce the agglomeration of nano-TiO 2 in asphalt. © 2021, The Authors. All rights reserved.

关键词： Graphene

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Addendum to “Fast Iterative-Interpolated DFT Phasor Estimator Considering Out-of-Band Interference”

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IEEE Transactions on Instrumentation and Measurement 2024年 73卷

作者： Jian Song Alessandro Mingotti Junhao Zhang Lorenzo Peretto He Wen College of Electrical and Information Engineering Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Hunan University Changsha China Department of Electric Electronic and Information Engineering “G.Marconi” University of Bologna Bologna Italy

In the above article [1] , the adopted i-IpDFT estimator was implemented strictly according to the pseudocodes reported in [2] , i.e., Algorithms 1 and 2. However, a more detailed implementation of the i-IpDFT estimator is reported in [3] . One crucial detail missing in [2] but reported in [3] is: for q > 1 every time the e-IpDFT is called, line 3 of Algorithm 1 in [3] (corresponding to line 2 of Algorithm 1 in [2] ) should be skipped, and the estimates of the previous iteration should be directly used in the spectral interference compensation routine in line 5 of Algorithm 1 in [3] (corresponding to line 4 of Algorithm 1 in [2] ). This crucial detail not only ensures that the i-IpDFT estimator has a faster convergence rate but also provides higher estimation accuracy.

关键词： Iterative methods Discrete Fourier transforms Phasor measurement units

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Flexible and Free-Standing La0.33ti2(Po4)3/C Nanofibers Film as a Novel High-Performance Anode for Sodium and Potassium Ion Batteries

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SSRN 2022年

作者： Dai, Jing Jing, Jian Yang, Jianping Zhang, Wen Liu, Shaoxiong Wang, Qianfu Wen, Jiaxing Hu, Hai Li, Huifang Liu, Li National Base for International Science & Technology Cooperation National Local Joint Engineering Laboratory for Key materials of New Energy Storage Battery Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion School of Chemistry Xiangtan University Xiangtan411105 China College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials Qingdao University of Science & Technology Qingdao266061 China School of Materials Science and Engineering Changsha University of Science & Technology Changsha410114 China

NASICON-type La0.33Ti2(PO4)3 (LaTP) is firstly proposed as sodium/potassium storage materials. The density functional theory calculations results show that LaTP has good electronic character and low Na+/K+ migration barriers. The flexible La0.33Ti2(PO4)3/C nanofibers film is synthesized via electrostatic spinning and investigated as free-standing electrode applied to sodium ion batteries (SIBs) and potassium ion batteries (PIBs). The low band gap and Na+/K+ migration barriers of LaTP, unique morphology, and complete conductive carbon net allow the La0.33Ti2(PO4)3/C nanofibers film with high capacity (296.3 mAh g-1 for SIBs and 235.8 mAh g-1 for PIBs), excellent rate performance (142.5 mAh g-1 for SIBs and 50.5 mAh g-1 for PIBs at 1 A g-1), and superior cyclability above 1000 cycles. The full cell tests show that the material has a good application prospect, indicating a promising flexible anode material for SIBs and PIBs. © 2022, The Authors. All rights reserved.

关键词： Potential energy

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Preparation and evaluation of bis(diallyl alkyl tertiary ammonium salt) polymer as a promising adsorbent for phosphorus removal

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Journal of Environmental Sciences 2019年第12期31卷 24-37页

作者： Zhengchi Yang Lihua Liu Lu Zhao Gang Su Zuoxiao Wei Anping Tang Jianrong Xue School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Theoretical Organic Chemistry and Function Molecule Ministry of EducationXiangtan 411201China Himan Prouincial Key Laboratory of Controllable Preparation and Fimctional Application of Fine Polymers Xiangtan 411201China Hunan Province College Key Laboratory of QSAR/QSPR Xiangtan 411201China

Problems associated with water eutrophication due to high phosphorus concentrations and related environmentally safe solutions have attracted wide attention.A novel bis(diallyl alkyl tertiary ammonium salt)polymer,particularly poly(N1,N1,N6,N6-tetraallylhexane-1,6-diammonium dichloride)(PTAHDADC),was synthesized and characterized by Fourier transform infrared spectroscopy,nuclear magnetic resonance,scanning electron microscopy,mercury intrusion method,and thermogravimetric *** adsorption characteristics in phosphorus were evaluated in dilute solution,and the recycling properties of PTAHDADC were *** showed that PTAHDADC possessed macropores with a size distribution ranging from 30 to 130μm concentrating at 63μm in diameter and had 46.52%of porosity,excellent thermal stability below 530 K,and *** could effectively remove phosphorus at p H=7–11 and had a removal efficiency exceeding 98.4%at pH=10–*** adsorption equilibrium data of PTAHDADC for phosphorus accorded well with the Langmuir and pseudo-second-order kinetic *** adsorption capacity was 52.82 mg/g at 293 *** adsorbed phosphorus rapidly and reached equilibrium within 90 *** activation energy Eawas 15.18 k J/*** presented an excellent recyclability with only 8.23%loss of removal efficiency after five adsorption–desorption *** morphology and structure of PTAHDADC slightly changed as evidenced by the pre-and post-adsorption of phosphorus,but the process was accompanied by the partial deprotonation of the(–CH2)3-NH+group of *** adsorption was a spontaneous exothermic process driven by entropy through physisorption,electrostatic attraction,and ion *** results showed that PTAHDADC was a highly efficient and fast-adsorbing phosphorus-removal material prospective in treating wastewater.

关键词： Bis(diallyl alkyl tertiary ammonium salt)polymer Phosphorus Adsorption thermodynamics Adsorption kinetics Removal mechanism

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Defective perovskite supported palladium-nickel nanocatalyst for effective electrochemical nitrate reduction

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Applied Catalysis B: Environmental 2025年 375卷

作者： Xu, Min Dong, Shuyue Guo, Haoran Tao, Zhiruo Jeon, Yukwon Zhang, Ziyun Chen, Zhongjun Su, Hongyang Liu, Zhi Lin, Yuanhua Irvine, John T.S. Li, Tingshuai Chen, Di The Future Laboratory Tsinghua University Beijing100084 China School of Materials and Energy University of Electronic Science and Technology of China Chengdu611731 China Department of Chemistry Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education Xiangtan University Hunan 411105 China Department of Environmental and Energy Engineering Yonsei University 26493 Korea Republic of School of Physical Science and Technology ShanghaiTech University Shanghai201210 China Beijing Synchrotron Radiation Facility Beijing100084 China Center for Transformative Science ShanghaiTech University Shanghai201210 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China School of Chemistry University of St Andrews St AndrewsKY16 9ST United Kingdom

Electrochemical reduction of nitrate to ammonia is challenged by the high dissociation energy of nitrate, sluggish kinetics and competitive side reactions. This study proposes PdNi alloy nanocrystals, formed by Pd deposition mediated in situ generation of Ni metallic species over defective La0.52Ca0.28Ni0.06Ti0.94O3 perovskite nanofibers, as a catalyst for nitrate reduction reaction. Such catalyst delivers an NH3 yield rate of 21.13 mgh−1mg−1cat (about 4226 mgh−1mg−1Pd) and a maximum Faradaic efficiency of 98.78 % at −1.0 V. Theoretical studies reveal that the adjoining of PdNi nanocrystals and oxygen vacancies on perovskite facilitate the nitrate hydrogenation and reduces dissociation energy of nitrates by enhancing the adsorption of reaction intermediates and suppresses the hydrogen evolution reaction. This technique provides a way for developing advanced catalysts with metallic phases and oxygen vacancies for optimized electrochemical nitrate reduction. © 2025 Elsevier B.V.

关键词： Reaction intermediates

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Corrigendum to "Image-driven prediction system: Automatic extraction of aggregate gradation of pavement core samples integrating deep learning and interactive image processing framework" [Constr. Build. Mater. 453 (2024) 139056] (Construction and Building Materials (2024) 453, (S0950061824041989), (10.1016/***.2024.139056))>

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Construction and Building Materials 2025年 483卷

作者： Dan, Han-Cheng Huang, Zhetao Lu, Bingjie Li, Mengyu School of Civil Engineering Central South University Hunan Changsha410075 China National Engineering Research Center for High-speed Railway Construction Technology Central South University Hunan Changsha410075 China Rail Data Research and Application Key Laboratory of Hunan Province Central South University Hunan Changsha410075 China

The authors request to update the corresponding author's email address, as the originally provided institutional email (bingjie_lu@***) is scheduled to be deactivated. The updated email address is: bingjie0824@***...

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Comparison of the Morphology,Structures and Mechanical Properties of Teleost Fish Scales Collected from New Zealand

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Journal of Bionic Engineering 2019年第2期16卷 328-336页

作者： Deju Zhu Chaohui Zhang Peng Liu Laith A.Jawad Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil EngineeringHunan UniversityChangsha 410082China International Science Innovation Collaboration Base for Green&Advanced Civil Engineering Materials of Hunan Province Hunan UniversityChangsha 410082China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Flat Bush ManukauAuckland 2016New Zealand

The mechanical properties and structures of fish scales have generated considerable research interest,however,comparative studies for different fish scales from difl^rent water regions have not been *** this paper,the surface morphologies,hierarchical structures and mechanical properties of four kinds of fish scales collected from freshwater,shallow sea,and deep sea in New Zealand are *** results indicate that the surface morphologies of those fish scales are similar at ventro-lateral,dorso-lateral and anterior locations,and the hierarchical structures of those fish scales all consist of two layers:a bone layer and a collagen layer composed of collagen ***,the spiral angles of the collagen lamellaes of different scales are *** largest are Mugil cephalus scales,while the smallest are Cyprinus carpio *** the mechanical behaviors of those fish scales,the tensile strength of Carassius auratus scales is the largest,but the ductility is the *** sieboldii scales have the best ***,the relationship between hierarchical structures and mechanical properties of fish scales is *** is found that the spiral angles of the collagen lamellaes and bond/collagen thickness ratio both have a great influence on the mechanical properties of fish scales.

关键词： morphology hierarchical structure mechanical property fish scale water region

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Feasibility Study on A Multi-Dimensional Intelligent Perception Method of Electricity Stealing Situation 2020

Feasibility Study on A Multi-Dimensional Intelligent Percept...

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Proceedings of the 3rd International Conference on Information Technologies and Electrical Engineering

作者： Xiangqi Xiao Rui Huang Maotao Yang Yanjiao Huang Wencheng Xiao Liang Yang State Grid Hunan Electric Power Company Limited Power Supply Service Center(Metrology Center) Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China State Grid Hunan Electric Power Company Limited Power Supply Service Center (Metrology Center) Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China State Grid Hunan management Training Center Changsha China China Resources Power Holdings Company Limited Shenzhen China Guangzhou Guangjian Construction Engineering Testing Center Co. Ltd. Guangzhou China

ISBN: (纸本)9781450388665

situational awareness technology can effectively improve the operational efficiency of grid and strongly guarantee the safe and stable operation of grid. Its important forecasting and decision support ability are indispensable parts of the smart grid. This article integrates a variety of professional systems, including power marketing system and power acquisition system, combines seasonal weather, social and economic information, and establishes a typical industry power consumption matrix data set and anti-electricity stealing diagnosis model, and proposes a multi-dimensional intelligent situational awareness solution of electricity stealing, which will improve the level of intelligent situational awareness of electricity stealing.

关键词： Electricity Stealing Feasibility Multi-dimensional

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