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SSRN 2023年

作者： Wang, Peng Huang, Jianqiang Li, Weiwen Wang, Le Shumuye, Eskinder Desta Wu, Meizhong Sun, Xiaohui Yuan, Fang Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering Shenzhen University Shenzhen518060 China Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology Hong Kong

Currently, fiber reinforced polymer (FRP) has been widely used for strengthening steel reinforced concrete (RC) beams to enhance their structural shear capacity. However, the potential for brittle shear failure in FRP-strengthened RC beams remains a concern, as the sudden rupture of a particular FRP strip can occur without fully utilizing the other strips. To address this issue, this study employs rubber support composite (RSC) to fill the space between the concrete and FRP strips, creating a series of plastic hinges. If a particular FRP strip is debonded, the shear load can be transferred to adjacent FRP strips, achieving a uniform stress/strain redistribution across the RC beam and protecting the FRP from abrupt failure. Experimental results indicate that the proposed FRP-RSC strengthening system effectively enhances the shear performance of RC beaming improving shear capacity (by 13.03% - 43.97%), ductility factor (by 14.33 - 74.13%) and energy dissipation rate (by 119.3% - 247.7%), compared to plain beam. Further, the effectiveness of the FRP-RSC system is demonstrated by comparison with other conventional reinforcing treatments. As the system is cost-effective, easy to implement, and suitable for practical engineering applications, it is expected to have promising prospects for future use. © 2023, The Authors. All rights reserved.

关键词： Ductility

A Two-Stage Framework for Sizing Renewable Capacity in a Hydro-Photovoltaic-Wind-Pump Storage Hybrid System

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SSRN 2024年

作者： Jiang, Jianhua Ming, Bo Yu, Ting Tao, Bai Guo, Yi Jurasz, Jakub Liu, Pan Huang, Qiang State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China Xi’an University of Technology Xi’an710048 China Hubei Water Resources Research Institute Wuhan430064 China Xi’an University of Technology China Faculty of Environmental Engineering Wroclaw University of Science and Technology Wroclaw50-370 Poland State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan430072 China

Renewable-dominated hybrid generation systems are developed to address the global warming and fossil energy shortage problems in worldwide. However, the capacity configuration of large HGSs could face "curse of dimensionality" challenge when simulating the operation of the system, because numerous capacity combinations of renewable power plants should be considered in the size optimization process. To address this issue, we propose a two-stage optimization framework to determine the renewable capacity in a hydro-photovoltaic (PV)-wind-pump storage hybrid system. In the first stage, a comprehensive fluctuation evaluation indicator was proposed to determine the optimal installed capacity ratio between the PV and wind power. Based on the optimized installed capacity ratio, a series of capacity scenarios of the aggregated renewable power plant were set. In the second stage, a daily operation policy of the hydro-PV-wind-pumped HGS was derived under each installed capacity scenario. Then the daily operations of the HGS were simulated to evaluate its technical performance. Constrained by technical thresholds in different levels, the optimal installed capacity of renewable power plant was obtained. A planned hydro-PV-wind-pumped storage HGS located in upper Yellow River basin, China was selected as a case study. The results revealed several key findings: a) there were distinct extreme points in the fluctuation evaluation indicators, suggesting the existence of an optimal capacity ratio between photovoltaic (PV) and wind power for maximal complementarity performance. This optimal ratio was identified as 30% for PV and 70% for wind power. b) the integration of Pumped-Storage Hydropower (PSH) significantly reduced the electricity curtailment rate during the non-flood season and the load loss rate during the flood season in the Hybrid Generation System (HGS). c) the installed capacities of PV and wind power were determined to be 3090MW and 7210MW, respectively, under a normal l

关键词： Wind power

Simulations of single event effects on the ferroelectric capacitor-based non-volatile SRAM design

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science China(Information sciences) 2021年第4期64卷 238-240页

作者： Jianjian WANG Jinshun BI Gang LIU Hua BAI Kai XI Bo LI Sandip MAJUMDAR Lanlong JI Ming LIU Zhangang ZHANG Institute of Microelectronics Chinese Academy of Sciences School of Electronics and Information Engineering Tianjin Polytechnic University Beijing Relitech Co. Ltd. Department of Science and Technology ICFAI University Tripura Science and Technology on Reliability Physics and Application of Electronic Component Laboratory China Electronic Product Reliability and Environmental Testing Research Institute

Dear editor,Non-volatile static random access memory (nvS RAM) with a 6-transistor 2-ferroelectric capacitor (6T2C) structure has been proposed, which meets requirements such as high operating speed and non-volatile m... 详细信息

关键词： Information Systems and Communication Service

17β-Estradiol (E2) Removal in Anode-Electrodialysis (Anode-Ed) During Nutrient Recovery from Pig Manure Digestate

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SSRN 2023年

作者： Cui, Wanjun Meng, Jizhong Wang, Shun Hu, Zhenhu Liu, Guangli Zhan, Xinmin Civil Engineering College of Science and Engineering University of Galway Ireland Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-sen University China Ryan Institute University of Galway Ireland SFI MaREI Research Centre University of Galway Ireland Department of Municipal Engineering School of Civil Engineering Hefei University of Technology China

Nutrient recovery from anaerobic digestate through electrodialysis technology (ED) has been investigated and shown high promise, but the removal of 17β-estradiol (E2), which is a natural estrogen and widely found in manure digestate, is not clear. This study examined the mechanism of membrane adsorption and anodic oxidation of E2 during recovering nutrient from manure digestate, and further investigated the performance of Anode-ED in E2 removal. The results showed that the removal of E2 in conventional ED was primarily attributed to membrane adsorption, resulting in no detectable E2 in the product solution. The adsorption capacity of the anion exchange membrane for E2 was significantly higher compared to that of the cation exchange membrane. During Anode-ED operation, E2 was efficiently removed by electrochemical oxidation, in which the chlorination played a primary role. Moreover, the oxidation intermediates of E2 were further removed after 40 min. Even though the carbonate, volatile fatty acid (VFA), and humic acid in the real wastewater have a negative impact on E2 oxidation, the E2 was completely removed from digestate during nutrient recovery in the anode-ED. This study indicates that anode-ED is a promising technology for the removal of E2 during nutrient recovery from digestate. © 2023, The Authors. All rights reserved.

关键词： Anodes

Metabolome profiling by widely-targeted metabolomics and biomarker panel selection using machine-learning for patients in different stages of chronic kidney disease

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Chinese Chemical Letters 2024年第11期35卷 266-272页

作者： Yao-Hua Gu Yu Chen Qing Li Neng-Bin Xie Xue Xing Jun Xiong Min Hu Tian-Zhou Li Ke-Yu Yuan Yu Liu Tang Tang Fan He Bi-Feng Yuan Department of Occupational and Environmental Health School of Public HealthResearch Center of Public HealthRenmin Hospital of Wuhan UniversityWuhan UniversityWuhan 430071China School of Nursing Wuhan UniversityWuhan 430071China Metware Biotechnology Co. Ltd.Wuhan 430075China Department of Nephrology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Key Laboratory of Vascular Aging Ministry of EducationTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Radiation and Medical Oncology Cancer Precision Diagnosis and Treatment and Translational Medicine Hubei Engineering Research CenterZhongnan Hospital of Wuhan UniversityWuhan Research Center for Infectious Diseases and CancerChinese Academy of Medical SciencesWuhan 430071China

Chronic kidney disease(CKD)is an increasingly prevalent medical condition associated with high mortality and cardiovascular *** intricate interplay between kidney dysfunction and subsequent metabolic disturbances may provide insights into the underlying mechanisms driving CKD onset and ***,we proposed a large-scale plasma metabolite identification and quantification system that combines the strengths of targeted and untargeted metabolomics technologies,i.e.,widely-targeted metabolomics(WT-Met)***-Met method enables large-scale identification and accurate quantification of thousands of *** collected plasma samples from 21 healthy controls and 62CKD patients,categorized into different stages(22 in stages 1-3,20 in stage 4,and 20 in stage 5).Using LC-MS-based WT-Met approach,we were able to effectively annotate and quantify a total of 1431metabolites from the plasma *** on the 539 endogenous metabolites,we identified 399significantly altered metabolites and depicted their changing patterns from healthy controls to end-stage ***,we employed machine-learning to identify the optimal combination of metabolites for predicting different stages of *** generated a multiclass classifier consisting of 7 metabolites by machine-learning,which exhibited an average AUC of 0.99 for the test *** general,amino acids,nucleotides,organic acids,and their metabolites emerged as the most significantly altered ***,their patterns of change varied across different stages of *** 7-metabolite panel demonstrates promising potential as biomarker candidates for *** exploration of these metabolites can provide valuable insights into their roles in the etiology and progression of CKD.

关键词： Widely-targeted metabolomics Machine-learning Chronic kidney disease Biomarker Mass spectrometry

Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface

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Journal of Iron and Steel Research International 2022年第10期29卷 1694-1709页

作者： Shao-zheng Ma Li-juan Sun Hu-yuan Sun Hong-bin Sun Jin-feng Jiang Yi-xin Yin Shu-feng Qu Zhen-hua Liu Shao-xia Xu Key Laboratory of Marine Environmental Corrosion and Bio-Fouling Institute of OceanologyChinese Academy of SciencesQingdao266071ShandongChina University of Chinese Academy of Sciences Beijing100049China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237ShandongChina Shandong Weilai High Speed Railway Co. Ltd.Jinan250102ShandongChina School of Civil Engineering Shandong UniversityJinan250061ShandongChina China Railway No.10 Engineering Group Co. Ltd.Qingdao266034ShandongChina

A newly developed rust layer on Q370qENH weathering steel(sample C)was studied under dry–wet cycle test of 3.5 wt.%NaCl solution and salt spray test,compared with the bare weathering steel(sample A)and the weathering steel with additive contents(CuSO_(4)0.2,FeSO_(4)0.1,NaHSO_(3)0.02,NaCl 0.02,Na_(2)HPO_(4)0.01,and water balance,in mass%,termed as sample B).Corrosion mechanism of Q370qENH weathering steel after different surface treatments was investigated by means of surface potential scanning,mass change,polarization curve,and X-ray *** results of X-ray diffraction indicate that rust of bare weathering steel has rare Fe_(3)O_(4),and a dense oxide layer mainly composed of Fe_(3)O_(4) is formed on rust of both sample B and sample *** surface potential of sample A gradually increases to−0.2 V in the dry–wet cycle test,while the surface potential of sample A maintains at about−0.6 V in the salt spray *** surface potential of sample B and sample C is higher than that of sample A in the early stage and remains stable during the short-term accelerated corrosion ***,the mass change of sample C gradually stabilizes with time in the dry–wet cycle and salt spray *** corrosion current of the sample A is lower than that of sample C in the initial stage of short-term accelerated corrosion ***,the corrosion current of sample C is smaller than that of the sample A in the *** main components of the deep rust of sample A areγ-FeOOH andα-FeOOH,while those of the deep rust of sample B and sample C are Fe_(3)O_(4).

关键词： Weathering steel Rust layer stabilization Surface treatment Corrosion Surface potential scanning Rust layer analysis

Multiscale architectures boosting thermoelectric performance of copper sulfide compound

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Rare Metals 2021年第8期40卷 2017-2025页

作者： Xin-Qi Chen Sheng-Jie Fan Chao Han Tian Wu Lian-Jun Wang Wan Jiang Wei Dai Jian-Ping Yang School of Physics and Mechanical and Electrical Engineering Hubei Engineering Technology Research Center of Environmental Purification MaterialsInstitute of Materials Research and EngineeringHubei University of EducationWuhan430205China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Institute for Superconducting and Electronic Materials University of WollongongNorth WollongongNSW2500Australia

Owing to their high performance and earth abundance,copper sulfides(Cu_(2-x)S)have attracted wide attention as a promising medium-temperature thermoelectric *** and grain-boundary engineering are explored to tune the electrical transport and phonon scattering of Cu_(2-x)S based on the liquid-like copper *** multiscale architecture-engineered Cu_(2-x)S are fabricated by a room-temperature wet chemical synthesis combining mechanical mixing and spark plasma *** observed electrical conductivity in the multiscale architecture-engineered Cu_(2-x)S is four times as much as that of the Cu_(2-x)S sample at 800 K,which is attributed to the potential energy filtering effect at the new grain ***,the multiscale architecture in the sintered Cu_(2-x)S increases phonon scattering and results in a reduced lattice thermal conductivity of 0.2 W·m^(-1)·K^(-1) and figure of merit(zT)of 1.0 at 800 *** a zT value is one of the record values in copper sulfide produced by chemical *** results suggest that the introduction of nanostructure and formation of new interface are effective strategies for the enhancement of thermoelectric material properties.

关键词： Thermoelectric properties Copper sulfides Room-temperature synthesis Nanostructure Semiconductor

The construction of high precision geostrophic currents based on new gravity models of GOCE and satellite altimetry data

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Acta Oceanologica Sinica 2021年第3期40卷 142-152页

作者： Wenyan Sui Junru Guo Jun Song Zhiliang Liu Meng Wang Xibin Li Yanzhao Fu Yongquan Li Yu Cai Linhui Wang Lingli Li Xiaofang Guo Wenting Zuo School of Marine Science and Environment Engineering Dalian Ocean UniversityDalian 116023China Operational Oceanographic Institution Dalian Ocean UniversityDalian 116023China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Institute of Marine Science Hebei Normal University of Science and TechnologyQinhuangdao 066600China Tianjin Marine Environmental Monitoring Central Station Ministry of Natural ResourcesTianjin 300457China

The new gravity field models of gravity field and steady-state ocean circulation explorer(GOCE),TIM_R6 and DIR_R6,were released by the European Space Agency(ESA)in June *** sixth generation of gravity models have the highest possible signal and lowest error levels compared with other GOCE-only gravity models,and the accuracy is significantly *** is an opportunity to build high precision geostrophic *** mean dynamic topography and geostrophic currents have been calculated by the 5th(TIM_R5 and DIR_R5),6th(TIM_R6 and DIR_R6)release of GOCE gravity field models and ITSG-Grace2018 of GRACE gravity field model in this *** comparison with the drifter results,the optimal filtering lengths of them have been obtained(for DIR_R5,DIR_R6,TIM_R5 and TIM_R6 models are 1°and for ITSG-Grace2018 model is 1.1°).The filtered results show that the geostrophic currents obtained by the GOCE gravity field models can better reflect detailed characteristics of ocean *** total geostrophic speed based on the TIM_R6 model is similar to the result of the DIR_R6 model with standard deviation(STD)of 0.320 m/s and 0.321 m/s,*** STD of the total velocities are 0.333 m/s and 0.325 m/s for DIR_R5 and TIM_*** compared with ITSG-Grace2018 results,the STD(0.344 m/s)of total geostrophic speeds is larger than GOCE results,and the accuracy of geostrophic currents obtained by ITSG-Grace2018 is *** the absolute errors are mainly distributed in the areas with faster speeds,such as the Antarctic circumpolar circulation,equatorial region,Kuroshio and Gulf Stream *** the remove-restore technique was applied to TIM_R6 MDT,the STD of total geostrophic speeds dropped to 0.162 m/s.

关键词： GOCE gravity field model mean dynamic topography geostrophic current

Gallium-Mediated Switch in Product Selectivity for CO2 Hydrogenation Over Ni/CeO2 Catalysts

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SSRN 2024年

作者： Zhang, Changxuan Xiao, Zhourong Zhang, Hui Gu, Jianmin Ye, Fei Yuan, Enxian Li, Guozhu Zou, Ji-Jun Wang, Desong Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University Qinhuangdao066004 China School of Chemistry and Chemical Engineering Yangzhou University Jiangsu Yangzhou225002 China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin300072 China School of Sciences Hebei University of Science and Technology Shijiazhuang050018 China

Achieving high activities and selectivity for the reverse water-gas shift (RWGS) reaction at low-temperatures continues to pose a significant challenge. Ni-based catalysts have been widely employed in CO2 hydrogenation due to their strong capacity to dissociate H2, but they exhibit low selectivity for CO. Herein, we successfully altered the product selectivity for CO2 hydrogenation via controlling the distribution of Ga species on Ni/CeO2 catalysts. When Ga was combined with Ni to form the spinel of NiGa2O4 (NiGa2O4/CeO2), the main product selectivity was CO. While, the Ga was doped into CeO2 to support Ni (Ni/Ga4-CeO2), the product selectivity was the CH4. The NiGa2O4 spinel supported on CeO2 exhibited excellent performance in the RWGS reaction, with a CO selectivity over 99%, and a production rate as high as 74.5 mmol/gcat·h at 450 oC and 24000 mL/gcat·h, without any loss of activity after 72 h. The Ni/Ga4-CeO2, containing metallic Ni species and abundant oxygen vacancies, enhanced the methanation process, with a CO2 conversion as high as 81.38%, and a CH4 production rate of 136 mmol/gcat·h. The CO-TPD analysis revealed that the NiGa2O4/CeO2 catalyst exhibited weak adsorption of CO*, which played a key role in enhancing the selectivity towards CO. Subsequent in-situ DRIFTS analysis further confirmed that the differences in CO2 hydrogenation product obtained from NiGa4/CeO2 and Ni/Ga4-CeO2 were due to the formation of different intermediate species over their surface, leading to a change in the selectivity of CO2 hydrogenation products. This study provides a new idea to switch the product selectivity for CO2 reduction by controlling the distribution of Ga species. © 2024, The Authors. All rights reserved.

关键词： Water gas shift

Highly efficient overall urea electrolysis via single-atomically active centers on layered double hydroxide

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science Bulletin 2022年第17期67卷 1763-1775页

作者： Huachuan Sun Linfeng Li Hsiao-Chien Chen Delong Duan Muhammad Humayun Yang Qiu Xia Zhang Xiang Ao Ying Wu Yuanjie Pang Kaifu Huo Chundong Wang Yujie Xiong School of Optical and Electronic Information Wuhan National Laboratory for OptoelectronicsOptics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074China Center for Reliability Science and Technologies Chang Gung UniversityTaoyuan 33302China Kidney Research Center Department of NephrologyChang Gung Memorial HospitalLinkouTaoyuan 33305China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Pico Center SUSTech Core Research FacilitiesSouthern University of Science and TechnologyShenzhen 518055China College of Chemistry and Chemical Engineering Tarim UniversityAlaer 843300China

Anodic urea oxidation reaction(UOR)is an intriguing half reaction that can replace oxygen evolution reaction(OER)and work together with hydrogen evolution reaction(HER)toward simultaneous hydrogen fuel generation and urea-rich wastewater purification;however,it remains a challenge to achieve overall urea electrolysis with high ***,we report a multifunctional electrocatalyst termed as Rh/Ni V-LDH,through integration of nickel-vanadium layered double hydroxide(LDH)with rhodium single-atom catalyst(SAC),to achieve this *** electrocatalyst delivers high HER mass activity of0.262 A mg^(-1) and exceptionally high turnover frequency(TOF)of 2.125 s^(-1) at an overpotential of100 m ***,exceptional activity toward urea oxidation is addressed,which requires a potential of 1.33 V to yield 10 mA cm^(-2),endorsing the potential to surmount the sluggish *** splendid catalytic activity is enabled by the synergy of the Ni V-LDH support and the atomically dispersed Rh sites(located on the Ni-V hollow sites)as evidenced both experimentally and *** selfsupported Rh/Ni V-LDH catalyst serving as the anode and cathode for overall urea electrolysis(1 mol L^(-1) KOH with 0.33 mol L^(-1) urea as electrolyte)only requires a small voltage of 1.47 V to deliver 100 mA cm^(-2) with excellent *** work provides important insights into multifunctional SAC design from the perspective of support sites toward overall electrolysis applications.

关键词： Single-atomically active centers Layer double hydroxide Hydrogen evolution reaction Overall urea electrolysis High turnover frequency