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Urban water system theory and its model development and application

Science China Earth Sciences 2024年第3期67卷 704-724页

作者： Jun XIA Yongyong ZHANG Dunxian SHE Shiyan ZHANG Jun YANG Mingquan LV Xiang ZHANG Anqi LUO Shengjun WU Yang LIU Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Water Resources&Hydropower Engineering Sciences Wuhan UniversityWuhan 430072China Aquatic Eco Health Group Key Laboratory of Urban Environment and HealthInstitute of Urban EnvironmentFujian Key Laboratory of Watershed EcologyChinese Academy of SciencesXiamen 361021China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

The urban water system theory is an extension of the basin water system science on an urban scale, providing a new systematic solution for the unbalanced human-water relationship and severe water challenges, such as waterlogging, black and odorous water, and ecological degradation caused by urbanization. Most existing studies on urban water systems have focused on individual water cycle processes linked with water supply and sewage treatment plants, but mutual feedback between the water cycle and its associated material circulation and water ecology, as well as human processes, still needs further exploration. In this paper, the concept, theory, and technical methodology of the urban water system were developed based on the water cycle and basin water system science. The Urban Water System 5.0(UWS 5.0) model was developed by integrating the Time Variant Gain rainfall-runoff Model with Urban water system(TVGM_Urban) in different underlying surface conditions for analyzing the natural-social water cycle processes and their associated water environmental and ecological processes and the influence of multiscale sponge measures. Herein, five major simulation functions were realized: rainfall-runoff-nonpoint source pollutant load,water and pollutant transportations through the drainage network system, terminal regulation and purification, socioeconomic water cycle, and water system assessment and regulation. The location for the case study used in this paper was Wuhan City. The findings showed that the entire urban water system should consider the built-up area and its associated rivers and lakes as the research object and explore the integrations among the urban natural-social water cycle and river regulations inside and outside of the city as well as the effects of socioeconomic development and sponge measures on the water quantity-quality-ecology processes. The UWS 5.0 model efficiently simulated the urban rainfall-runoff process, total nitrogen(TN) and total phosphoru

关键词： Urban water system Human-water relationship Water issue Green development Theoretical basis Mathematical model

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Effects of La and Ce on the microstructure,thermal conductivity and strength synergy of the as-extruded Mg-Mn-RE alloys

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Journal of Magnesium and Alloys 2025年第2期13卷 654-667页

作者： Huafeng Liu Taiki Nakata Chao Xu Guangze Tang Danyang Li Xiaojun Wang Guisong Wang Shigeharu Kamado Lin Geng State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin150001PR China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001PR China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka940-2188Japan Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin150001PR China School of Physics Harbin Institute of TechnologyHarbin150001PR China

High thermal conductivity and high strength Mg-1.5Mn-2.5Ce alloy with a tensile yield strength of 387.0 MPa,ultimate tensile strength of 395.8 MPa,and thermal conductivity of 142.1 W/(m·K)was successfully fabricated via hot *** effects of La and Ce additions on the microstructure,thermal conductivity,and mechanical properties of the Mg-1.5Mn alloy were *** results indicated that both the as-extruded Mg-1.5Mn-2.5La and Mg-1.5Mn-2.5Ce alloys exhibited a bimodal grain structure,with dynamically precipitated nano-scaleα-Mn *** comparison with La,the addition of Ce enhanced the dynamic precipitation more effectively during hot extrusion,while its influence on promoting the dynamic recrystallization was relatively *** high tensile strength obtained in the as-extruded Mg-1.5Mn-2.5RE alloys can be attributed to the combined influence of the bimodal grain structure(with fine dynamic recrystallized(DRXed)grain size and high proportion of un-dynamic recrystallized(unDRXed)grains),dense nano-scale precipitates,and broken Mg12RE phases,while the remarkable thermal conductivity was due to the precipitation of Mn-rich phases from the Mg matrix.

关键词： Mg-Mn-RE alloys Thermal conductivity Mechanical properties Dynamic precipitation

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An assessment of the CMIP6 performance in simulating Arctic sea ice volume flux via Fram Strait

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Advances in Climate Change Research 2024年第4期15卷 584-595页

作者： Hui-Yan KUANG Shao-Zhe SUN Yu-Fang YE Shao-Yin WANG Hai-Bo BI Zhuo-Qi CHEN Xiao CHENG School of Geospatial Engineering and Science Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Key Laboratory of Comprehensive Observation of Polar Environment(Sun Yat-sen University) Ministry of EducationZhuhai 519082China CAS Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences(CAS)Qingdao 266071China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China

Numerical models serve as an essential tool to investigate the causes and effects of Arctic sea ice *** the simulation capabilities of the most recent CMIP6 models in sea ice volume flux provides references for model applications and ***,reliable long-term simulation results of the ice volume fux contribute to a deeper understanding of the sea ice response to global climate *** this study,the sea ice volume flux through six Arctic gateways over the past four decades(1979-2014)were estimated in combination of satellite observations of sea ice concentration(SIC)and sea ice motion(SIM)as well as the Pan-Arctic Ice-Ocean Modeling and Assimilation System(PIOMAS)reanalysis sea ice thickness(SIT)*** simulation capability of 17 CMIP6 historical models for the volume flux through Fram Strait were quantitatively *** ice volume flux simulated from the ensemble mean of 17 CMIP6 models demonstrates better performance than that from the individual model,yet IPSL-CM6A-LR and EC-Earth3-Veg-LR outperform the ensemble mean in the annual volume flux,with Taylor scores of 0.86 and 0.50,***6 models display relatively robust capability in simulating the seasonal variations of volume *** them,CESM2-WACCM performs the best,with a correlation coefficient of 0.96 and a Taylor score of ***,NESM3 demonstrates the largest devi-ation from the observation/reanalysis data,with the lowest Taylor score of *** variability of sea ice volume flux is primarily influenced by SIM and SIT,followed by *** extreme large sea ice export through Fram Strait is linked to the occurrence of anomalously low air temperatures,which in turn promote increased SIC and SIT in the corresponding ***,the intensified activity of Arctic cyclones and Arctic dipole anomaly could boost the southward sea ice velocity through Fram Strait,which further enhance the sea ice outflow.

关键词： Sea ice volume flux CMIP6 models Fram Strait Attribution analysis

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Efficient and selective extraction of uranium from seawater based on a novel pulsed liquid chromatography radionuclide separation method

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Nuclear Science and Techniques 2023年第2期34卷 13-27页

作者： Jian‑Hua Ye Tao Yu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

The novel pulsed liquid chromatography radionuclide separation method presented here provides a new and promising strategy for the extraction of uranium from *** this study,a new chromatographic separation method was proposed,and a pulsed nuclide automated separation device was developed,alongside a new chromatographic *** length of this chromatographic column was 10 m,with an internal warp of 3 mm and a packing size of 1 mm,while the total separation units of the column reached 12,*** most favorable conditions for the separation of nuclides were then obtained through optimizing the separation conditions of the device:Sample pH in the column=2,sample injection flow rate=5.698 mL/min,chromatographic column heating temperature=60℃.Separation experiments were also carried out for uranium,europium,and sodium ions in mixed solutions;uranium and sodium ions in water samples from the Ganjiang River;and uranium,sodium,and magnesium ions from seawater *** separation factors between the different nuclei were then calculated based on the experimental data,and a formula for the separation level was *** experimental results showed that the separation factor in the mixed solution of uranium and europium(1:1)was 1.088,while achieving the initial separation of uranium and europium theoretically required a 47-stage *** the separation factor of 1.50for the uranium and sodium ions in water samples from the Ganjiang River,achieving the initial separation of uranium and sodium ions would have theoretically required at least a 21-stage ***,for the seawater sample separation experiments,the separation factor of uranium and sodium ions was 1.2885;therefore,more than 28 stages of sample separation would be required to achieve uranium extraction from *** novel pulsed liquid chromatography method proposed in this study was innovative in terms of uranium separation and enrichment,while expanding the possibilities

关键词： Pulsed liquid chromatography Nuclide separation Seawater uranium extraction Uranium enrichment

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Enhanced removal of antibiotic resistance genes during chicken manure composting after combined inoculation of Bacillus subtilis with biochar

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Journal of environmental Sciences 2024年第1期135卷 274-284页

作者： Zewen Wu Luan Zhang Hao Lin Shungui Zhou Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China School of Environmental Science and Engineering Hubei Key Laboratory of Mine Environmental Pollution Control and RemediationHubei Polytechnic UniversityHuangshi 435003China Fujian Provincial Key Laboratory of Eco-Industrial Green Technology Wuyi UniversityWuyishan 354300China

This study explored the combined effects of Bacillus subtilis inoculation with biochar on the evolution of bacterial communities,antibiotic resistance genes(ARGs),and mobile genetic elements(MGEs)during the composting of chicken *** results showed that *** inoculation combined with biochar increased bacterial abundance and diversity as well as prolonged the compost thermophilic *** organic matter biodegradation and facilitated the organic waste compost humification process,reduced the proliferation of ARGs by altering the bacterial *** and Actinobacteriota were the main resistant bacteria related to ARGs and *** decrease in ARGs and MGEs was associated with the reduction in the abundance of related host *** inoculation with *** and the addition of biochar could promote nutrient transformation,reduce the increase in ARGs and MGEs,and increase the abundance of beneficial soil taxa.

关键词： Antibiotic resistance gene Bacillus subtilis Bacterial community Biochar Composting

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Metagenomic insights into responses of microbial population and key functional genes to fulvic acid during partial nitritation

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Journal of environmental Sciences 2023年第2期124卷 952-962页

作者： Li Zhang Shuang Lan Quanhao Dou Shiwei Hao Yueping Wang Xiaoxuan Wang Ruoyan Zhang Yongzhen Peng Jiachun Yang National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery EngineeringBeijing University of TechnologyBeijing 100124China Shuifa Shandong Water Development Group Co.Ltd. Shandong 274200China

The long-term impact of fulvic acid(FA)on partial nitritation(PN)systemwas initially examined in this *** obtained results revealed that the FA lower than 50 mg/L had negligible effect on the nitrite accumulation rate(NAR nearly 100%)and ammonium removal rate(ARR 56.85%),while FA over 50 mg/L decreased ARR from 56.85%to 0.7%.Sludge characteristics analysis found that appropriate FA(<50 mg/L)exposure promoted the settling performance and granulation of PN sludge by removing Bacteroidetes and accumulating *** analysis of metagenomics suggested that the presence of limited FA(0-50 mg/L)stimulated the generation of NADH,which favors the denitrification and nitrite *** negative impact of FA on the PN system could be divided into two ***,limited FA(50-120 mg/L)was decomposed by Anaerolineae to stimulate the growth and propagation of heterotrophic bacteria(Thauera).Increasing heterotrophs competed with AOB(Nitrosomonas)for dissolved oxygen,causing AOB to be eliminated and ARR to ***,when FA dosage was over 120 mg/L,Anaerolineae were inhibited and heterotrophic bacteria reduced,resulting in the abundance of AOB ***,the ammonium transformation pathway was suppressed because genes amoABC and hao were obviously reduced,leading to the deterioration of reactor ***,these results provide theoretical guidance for the practical application of PN for the treatment of FA-containing sewage.

关键词： Partial nitritation Fulvic acid Microbial community Functional genes Metagenomic

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Nonlinear free vibration of piezoelectric semiconductor doubly-curved shells based on nonlinear drift-diffusion model

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Applied Mathematics and Mechanics(English Edition) 2023年第10期44卷 1761-1776页

作者： Changsong ZHU Xueqian FANG Jinxi LIU State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China Key Laboratory of Mechanical Behavior Evolution and Control of Traffic Engineering Structures in Hebei Shijiazhuang 050043China School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808Guangdong ProvinceChina

In this paper, the nonlinear free vibration behaviors of the piezoelectric semiconductor(PS) doubly-curved shell resting on the Pasternak foundation are studied within the framework of the nonlinear drift-diffusion(NLDD) model and the first-order shear deformation theory. The nonlinear constitutive relations are presented, and the strain energy, kinetic energy, and virtual work of the PS doubly-curved shell are *** on Hamilton's principle as well as the condition of charge continuity, the nonlinear governing equations are achieved, and then these equations are solved by means of an efficient iteration method. Several numerical examples are given to show the effect of the nonlinear drift current, elastic foundation parameters as well as geometric parameters on the nonlinear vibration frequency, and the damping characteristic of the PS doublycurved shell. The main innovations of the manuscript are that the difference between the linearized drift-diffusion(LDD) model and the NLDD model is revealed, and an effective method is proposed to select a proper initial electron concentration for the LDD model.

关键词： nonlinear free vibration piezoelectric semiconductor(PS)doubly-curved shell nonlinear drift-diffusion(NLDD)model linearized drift-diffusion(LDD)model

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Performance comparison of lithium fractionation from magnesium via continuous selective nanofiltration/electrodialysis

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Chinese Journal of Chemical engineering 2023年第7期59卷 42-50页

作者： Yong Xu Qingbai Chen Yang Gao Jianyou Wang Huiqing Fan Fei Zhao Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and EngineeringNankai UniversityTianjin 300350China College of Chemical Engineering and Material Quanzhou Normal UniversityQuanzhou 362000China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Although selective nanofiltration(SNF)and selective electrodialysis(SED)have been widely adopted in the field of Mg^(2+)/Li^(+)separation,their differences have not been illustrated *** this study,for the first time,SNF and SED processes in continuous mode were studied for Li+fractionation from the same brine with high Mg/Li ratios and their differences were discussed in *** a fair analysis of the two processes,typical factors were ***,the optimal operating pressure and feed flow rate for SNF were 2.4 MPa and 140 L·h^(-1),respectively,while the optimal cell-pair voltage and replenishment flow rate for SED were 1.0 V and 14 L·h^(-1),*** the Li^(+)fractionation capacity of the two processes were similar,the selectivity coefficient of SNF was 24.7% higher than that of SED and,thus,the Mg/Li ratio in purified stream of the former was 19.0% lower than that of the *** to higher ion driving force,SED had clear advantages in recovery ratio and concentration ***,the specific energy consumption of SED was 20.1% lower than that of *** study provided a better understanding and guidance for the application and improvement of the two technologies.

关键词： High Mg/Li brine Purification Membrane Nanofiltration Electrodialysis Lithium recovery

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Software Failure Prediction based on Thermal Images 9

Software Failure Prediction based on Thermal Images

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9th International Conference on Dependable Systems and Their Applications, DSA 2022

作者： Gong, Yiang Lu, Minyan Kong, Shiyi Yan, Liang The Key Laboratory on Reliability and Environment Engineering Technology China School of Reliability and Systems Engineering Beihang University Beijing China Beijing High Quality of Systems Technology Co. Beijing China

ISBN: (数字)9781665488778

ISBN: (纸本)9781665488778

Software failure prediction is one of the most critical issues in software reliability research. And there are several crucial challenges for software failure prediction, which includes complex data, intrusive monitoring that brings potential risk to the system and monitoring costs. We proposed the FPbTI approach to predict software failure by using thermal images taken from outside of the hardware. In this approach, a data processing method is proposed and a convolutional neural network model is constructed. Additionally, corresponding experimental system was designed to verify the effectiveness of the approach. We experimentally demonstrate that our proposed approach achieves the goal of software failure prediction and shows remarkable performance. © 2022 IEEE.

关键词： Software reliability

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Synergizing 3D-printed structure and sodiophilic interface enables highly efficient sodium metal anodes

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Chinese Chemical Letters 2024年第11期35卷 528-534页

作者： Changyuan Bao Yunpeng Jiang Haoyin Zhong Huaizheng Ren Junhui Wang Binbin Liu Qi Zhao Fan Jin Yan Meng Chong Jianguo Sun Fei Wang Bo Wang Ximeng Liu Dianlong Wang John Wang School of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224007China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(ASTAR)Singapore 138634Singapore

Sodium(Na)metal batteries have gained increasing attention more recently,owing to their high energy densities and cost efficiencies,but are severely handicapped by the unsatisfactory Coulombic efficiency(CE)and cycling stability stemming from dendrite growth on Na *** this study,we developed a strategy of direct ink writing(DIW)3D printing combined with electroless deposition to construct a hierarchical Cu grid coated with a dense nanoscale Ag interfacial layer as the host material for Na *** sodiophilic Ag interface contributes to a fall in the Na nucleation energy,hence enabling uniform Na deposition on each 3D-printed *** constructed 3D-printed structure can effectively moderate the electric-field distribution and lower the local current density for relieving Na inhomogeneous growth,as confirmed by finite element simulation and Na plating/stripping morphology evolution *** particular,the unique 3D structure also promotes the lateral growth of Na,thus the volume change of Na metal was accommodated to stabilize the solid electrolyte interphase(SEI).As a result,the CE of the half-cell can reach 99.9%at the current density of 1 m A/cm^(2)after 300 cycles and the full-cell exhibits outstanding electrochemical performance(capacity retention of 91.0%after 500 cycles at 2 C).

关键词： 3D-printed host Sodiophilic interface Dendrite-free High reversibility Sodium metal batteries

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