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The rule of four:anomalous distributions in the stoichiometries of inorganic compounds

npj Computational Materials 2024年第1期10卷 2479-2486页

作者： Elena Gazzarrini Rose K.Cersonsky Marnik Bercx Carl S.Adorf Nicola Marzari Theory and Simulation of Materials(THEOS)and National Center for Computational Design and Discovery of Novel Materials(MARVEL) École Polytechnique Fédérale de LausanneCH-1015 LausanneSwitzerland Department of Chemical and Biological Engineering University of Wisconsin-MadisonMadisonWIUSA

Why are materials with specific characteristics more abundant than others?This is a fundamental question in materials science and one that is traditionally difficult to tackle,given the vastness of compositional and configurational *** highlight here the anomalous abundance of inorganic compounds whose primitive unit cell contains a number of atoms that is a multiple of *** occurrence—named here the rule of four—has to our knowledge not previously been reported or ***,we first highlight the rule’s existence,especially notable when restricting oneself to experimentally known compounds,and explore its possible relationship with established descriptors of crystal structures,from symmetries to *** then investigate this relative abundance by looking at structural descriptors,both of global(packing configurations)and local(the smooth overlap of atomic positions)*** to intuition,the overabundance does not correlate with lowenergy or high-symmetry structures;in fact,structures which obey the rule of four are characterized by low symmetries and loosely packed arrangements maximizing the free *** are able to correlate this abundance with local structural symmetries,and visualize the results using a hybrid supervised-unsupervised machine learning method.

关键词： method inorganic rule

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Study on the diurnal variation characteristics of water transparency and suspended solids in winter for an urban landscape lake in Jiaxing 5

Study on the diurnal variation characteristics of water tran...

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5th International Conference on Green Energy, Environment, and Sustainable Development, GEESD 2024

作者： Zhu, Xiaoming Tang, Yicang Wei, Ping Xu, Lianjun CCCC Shanghai Waterway Engineering Design and Consulting Co. Ltd. Shanghai200120 China Shanghai Engineering Research Center of Water Environment Simulation and Ecological Restoration Shanghai200120 China

ISBN: (纸本)9781510683006

In November 2023, a 24-hour study was conducted on the dynamic changes in water transparency and suspended solids in Nanhu Lake, a typical urban landscape lake in the plain river network region during winter. The results indicated that in November, Nanhu Lake had an average water depth of 2.98 meters and an average water transparency of 44.48 cm, with a mean water temperature of 15.69°C. Turbidity values ranged from 20.35 to 54.51 NTU, with an average of 33.62 NTU. The average values for DO, EC, ORP, and TDS were 9.57 mg/L, 450.89 μs/cm, 157.04 mV, and 225.31 mg/L, respectively, with no significant differences in major water quality indicators across different regions. The 24-hour water transparency variation and patterns at the three sampling stations in Nanhu Lake showed considerable differences, influenced by various factors. Transparency was lowest during the daytime from 06:30 to 18:30, with relatively higher suspended solids content. The content of suspended solids ranged from 13.40 to 39.20 mg/L, with an average of 26.04 mg/L, showing significant variation across different regions. Sampling station 1 was notably affected by disturbances from docked boats. In terms of composition, inorganic and organic suspended solids accounted for 83% and 17%, respectively, with inorganic particles being predominant. The median particle size of suspended solids in Nanhu Lake ranged from 4.77 to 7.83 μm, with an average size of 6.15 μm. The particle size distribution was 75% for particles 20 μm. The suspended particles in the surface water of Nanhu Lake were finer than those in the bottom layer, making them more difficult to settle naturally once resuspended. © 2024 SPIE.

关键词： Lakes

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Study on summer and winter seasonal variation characteristics of the absorption and scattering coefficients of a typical urban landscape lake in Hangjiahu Plain 5

Study on summer and winter seasonal variation characteristic...

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5th International Conference on Green Energy, Environment, and Sustainable Development, GEESD 2024

作者： Zhu, Xiaoming Tang, Yicang Wei, Ping Yan, Jun Xu, Lianjun CCCC Shanghai Waterway Engineering Design and Consulting Co. Ltd. Shanghai200120 China Shanghai Engineering Research Center of Water Environment Simulation and Ecological Restoration Shanghai200120 China

ISBN: (纸本)9781510683006

Using the inherent optical properties (IOPs) and water quality analysis data of the water samples from Nanhu (a typical urban landscape lake in Hangjiahu Plain) measured in the laboratory in August and December 2023, we experimentally determined and calculated the absorption coefficient, scattering coefficient, and light attenuation coefficient of the water body in summer and winter, and analyzed the dominant factors affecting light attenuation in different seasons. The results indicate that the absorption, scattering, and light attenuation effects of each component of the water body in Nanhu during the summer are higher than those in winter. The average values of a(λ), b(λ), and c(λ) in summer are 2.36 m-1, 2.80 m-1 and 5.16 m-1, respectively, while in winter, these values are 0.69 m-1, 1.16 m-1, and 1.85 m-1, respectively. This suggests that the water body components contributing to light attenuation exhibit certain differences in absorption and scattering characteristics between summer and winter. Regardless of the season, whether it is winter or summer, the contribution of components to the total light attenuation in Nanhu follows the order: non-algal particles>algal particles>CDOM (colored dissolved organic matter)>pure water. Inorganic particles are the dominant factor causing light attenuation in Nanhu water, with algal particles being the secondary contributor. In summer, the contributions of the absorption and scattering effects of each component of the water body in Nanhu are essentially equivalent, whereas, in winter, the scattering effect is significantly higher than the absorption effect. © 2024 SPIE.

关键词： Optical depth

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Preparation and properties of functional materials of montmorillonite-biochar composite slow-release fertilizer 5

Preparation and properties of functional materials of montmo...

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5th International Conference on Green Energy, Environment, and Sustainable Development, GEESD 2024

作者： Wei, Ping Zhu, Xiaoming Tang, Yichang CCCC Shanghai Waterway Engineering Design and Consulting Co. Ltd. Shanghai200120 China Shanghai Engineering Research Center of Water Environment Simulation and Ecological Restoration Shanghai200120 China

ISBN: (纸本)9781510683006

Biochar was prepared from corn straw, and the basic properties of biochar were studied, including elemental analysis, surface functional groups, and crystal structure. The soil leaching experiment of compound fertilizer was carried out by mixing three substances of biochar, montmorillonite and urea in different proportions to form a composite fertilizer, and the cumulative release rate of nitrogen in the soil of the composite material was investigated. In the soil leaching experiment, after 18 days of leaching, the cumulative release rate of nitrogen at biochar: urea was 1:1, which was 17.9% lower than that of pure urea, the quasi-first-order kinetics could better fit the process, and the release rate constant was 0.233 min-1;when the Montmorillonite: urea is 1:1, the nitrogen release after filtration is 16.4% lower than that of pure urea at 18 days, and the release process is in line with the secondary kinetics, and the rate constant is 3.63×10-3%·min-1. When montmorillonite: biochar:urea=1:1:1, the sustained release performance of the compound fertilizer was optimal, and the cumulative release rate of nitrogen at 18 days was 56.2%. The results show that the compound fertilizer formed by biochar, urea and montmorillonite granulation can better delay the release of urea. © 2024 SPIE.

关键词： Urea fertilizers

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A new mobility field and gradient-based traffic signal control approach applicable to large-scale road networks

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Transportation Safety and Environment 2025年第1期7卷 62-73页

作者： Hu Yang Bao Guo Changxin Yan Zhiqiang Chen Pu Wang School of Traffic and Transportation Engineering Rail Data Research and Application Key Laboratory of Hunan ProvinceCentral South UniversityChangsha 410000China Changsha Planning&Design Survey Research Institute Changsha 410000China Hunan Engineering Research Center of Urban Transport Data-driven Modeling&Simulation Changsha 410000China

Previous traffic control models were usually developed on small or medium sized road *** traffic control models applicable to large-scale road networks have received growing *** this study,we develop a new mobility field and gradient-based traffic signal control approach applicable to large road ***,we introduce an emerging analytical technique,the mobility field approach,to generate the mobility field of urban travels and measure the gradients of the mobility ***,a gradient-based approach is proposed to identify the signalized intersections for implementing traffic ***,a gradient-based traffic control model is developed to alleviate traffic congestion during mass events.A new solution algorithm,termed DBSCAN-FW-GA,is proposed to solve the developed traffic control *** developed mobility field and gradient-based traffic signal control approach is validated using actual road network data and travel demand *** indicate that the proposed new traffic control approach can reduce by 17.97%the travel time compared with the widely used perimeter control approach.

关键词： mobility field gradient human mobility traffic control congestion

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Ultrathin organic solvent nanofiltration membrane with polydopamine-HKUST-1 interlayer for organic solvent separation

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Journal of Environmental Sciences 2024年第7期141卷 182-193页

作者： Haike Li Xindong Li Guozai Ouyang Lijinhong Huang Lang Li Wenhao Li Wanfu Huang Duokun Li Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou 341000China School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou 341000China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityWA 6845Australia School of Materials Science and Engineering Tiangong UniversityTianjin 300387China

Polydopamine(PDA)and metal-organic skeleton HKUST-1 were co-deposited on the base membrane of hexamethylenediamine(HDA)-crosslinked polyetherimide(PEI)ultrafiltration membrane as the interlayer,and high-throughput organic solvent nanofiltration membrane(OSN)was prepared by interfacial polymerization and solvent activation *** polyamide(PA)layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6/PEI membrane,reduced the thickness of the separation layer from 79 to 14 nm,and significantly improved the hydrophilic,thermal and mechanical *** flux of the PA/PDA-HKUST-10.6/PEI membrane in a 0.1 g/L Congo Red(CR)ethanol solution at 0.6 MPa test pressure reached 21.8 L/(m^(2)·hr)and the rejection of CR was 92.8%.Solvent adsorption test,N,N-dimethylformamide(DMF)immersion experiment,and long-term operation test in ethanol showed that the membranes had high solvent *** solvent flux test demonstrated that,under the test pressure of 0.6 MPa,the flux of different solvents ranked as follows:methanol(56.9 L/(m^(2)·hr))>DMF(39.6 L/(m^(2)·hr))>ethanol(31.2 L/(m^(2)·hr))>IPA(4.5 L/(m^(2)·hr))>N-hexane(1.9 L/(m^(2)·hr)).The ability of the membranes to retain dyes in IPA/water dyes solution was also *** flux of the membrane was 30.4 L/(m^(2)·hr)and the rejection of CR was 91.6%when the IPA concentration reached 50%.This OSN membrane-making strategy is economical,environment-friendly and efficient,and has a great application prospect in organic solvent separation systems.

关键词： Interfacial polymerization Organic solvent nanofiltration Interlayer Metal-organic frameworks Polydopamine

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Study on the treatment of rural domestic sewage by mud membrane coupled integrated above-ground equipment: A case study of Putian, Fujian Province 5

Study on the treatment of rural domestic sewage by mud membr...

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5th International Conference on Green Energy, Environment, and Sustainable Development, GEESD 2024

作者： Zhu, Xiaoming Zhang, Xiangxiang Wei, Ping Tang, Yicang Zheng, Yanhao Gu, Yong Wang, Lihua Chen, Chen Zhao, Donghua CCCC Shanghai Waterway Engineering Design and Consulting Co. Ltd. Shanghai200120 China Shanghai Engineering Research Center of Water Environment Simulation and Ecological Restoration Shanghai200120 China CCCC Shanghai Dredging Co. Ltd. Shanghai200000 China

ISBN: (纸本)9781510683006

Using a self-developed mud membrane coupling integrated process and its above-ground treatment equipment to centrally treat domestic sewage in a rural area of Putian City, Fujian Province, this study investigated the treatment efficiency and performance of the equipment during continuous and stable operation after installation and commissioning. Long-term on-site monitoring results showed that the average removal rates of BOD5, COD, TP, NH4+N, TN and SS in the sewage were 89.7%, 86.8%, 97%, 93.9%, 83.6%, and 86.4%, respectively. The average effluent concentrations were reduced to 20.5, 7.95, 4.25, 13.65, 0.17, and 11.17 mg/L, respectively. The main water quality indicators of the effluent all met the Class A discharge standards of the Fujian provincial standard (DB35/1869-2019). During the six months of stable operation, the equipment maintained stable performance and removal efficiency for various pollutants, with a maximum treatment capacity of 50 t/d. The operating cost of the equipment, excluding labor costs, was approximately 0.72 yuan/*** equipment demonstrated strong resistance to pollution shock loads, effective sewage treatment, easy operation and management, stable performance, and relatively low operating costs. It can act as a guide for other rural sewage treatment projects and the restoration of black and odorous water bodies. © 2024 SPIE.

关键词： Operating costs

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Application of mud membrane coupled integrated buried treatment equipment in rural domestic sewage treatment—A case study of Taizhou, Jiangsu Province 5

Application of mud membrane coupled integrated buried treatm...

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5th International Conference on Green Energy, Environment, and Sustainable Development, GEESD 2024

作者： Zhu, Xiaoming Tang, Yicang Wei, Ping Zhang, Xiangxiang Zheng, Yanhao Gu, Yong Wang, Lihua Chen, Chen Huang, Dongsheng Gu, Yuanliang CCCC Shanghai Waterway Engineering Design and Consulting Co. Ltd. Shanghai200120 China Shanghai Engineering Research Center of Water Environment Simulation and Ecological Restoration Shanghai200120 China CCCC Shanghai Dredging Co. Ltd. Shanghai200000 China

ISBN: (纸本)9781510683006

Employing a self-developed mud membrane coupling integrated process along with its underground treatment equipment to manage rural domestic sewage in Taizhou City., Jiangsu Province, this study investigates the treatment effects and performance during continuous stable operation after installation and commissioning of the equipment. Long-term onsite experimental results indicate that the average removal rates of NH4+-N, COD, TP and TN in sewage are approximately 85.4%, 87.6%, 71.9%, and 73.8%, respectively. The average effluent concentrations are reduced to 4.4, 22, 0.88, and 17.2 mg/L, meeting the primary A standards of Jiangsu Province’s local standard "Village Domestic Sewage Treatment Facility Water Pollutant Discharge Standard" (DB32/T3462-2018). During 7 months of stable operation, the sewage system of the equipment runs steadily with a maximum processing capacity of 5 t/d. The removal performance and efficiency of various pollutants remain stable, and the operating cost of the equipment is approximately 0.35 yuan/m3. This equipment demonstrates good performance in rural sewage treatment, strong resistance to shock loads, convenient management, stable operation, and low operating costs, providing valuable reference for other agricultural pollution control projects. © 2024 SPIE.

关键词： Water pollution

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Test-Driven Feature Extraction of Web Components

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Journal of Computer Science & Technology 2022年第2期37卷 389-404页

作者： Yong-Hao Long Yan-Cheng Chen Xiang-Ping Chen Xiao-Hong Shi Fan Zhou School of Computer Science and Engineering National Engineering Research Center of Digital Life Sun Yat-sen UniversityGuangzhou 510006China School of Design The Hong Kong Polytechnic UniversityHong KongChina Guangdong Key Laboratory for Big Data Analysis and Simulation of Public Opinion The School of Communication and DesignSun Yat-sen UniversityGuangzhou 510006China School of Information Technology and Engineering Guangzhou College of CommerceGuangzhou 511363China

With the growing requirements of web applications,web components are developed to package the implementation of commonly-used features for *** some cases,the developer may want to reuse some features which cannot be customized by the component’s ***/she has to extract the implementation by *** is labor-intensive and *** the widely-used test cases which can be useful to specify the software features,a test-driven approach is proposed to extract the implementation of the desired features in web *** satisfaction of the user^requirements is transformed into the passing rate of user-specified test *** this way,the quality of the extraction result can be evaluated ***,a record/replay-based GUI test generation method is proposed to ensure that the extraction result has the correct GUI *** extract the feature implementation,a hierarchical genetic algorithm is proposed to find the code snippet that can pass all the tests and has the approximate smallest *** compare our method with two existing feature extraction *** result shows that our method can extract the correct implementation with the minimum size.A human-subject study is conducted to show the effectiveness and weaknesses of our method in helping users extract the features.

关键词： feature extraction genetic algorithm graphical user interface software reuse

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Distributions of Electromagnetic Fields and Forced Flow and Their Relevance to the Grain Refinement in Al–Si Alloy Under the Application of Pulsed Magneto-Oscillation

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 254-274页

作者： Yan-Yi Xu Jing Zhao Chun-Yang Ye Yan-Ping Shen Xin-Cheng Miao Yun-Hu Zhang Qi-Jie Zhai Center for Advanced Solidification Technology Shanghai UniversityShanghai 200072China Key Lab of Intelligent Equipment Digital Design and Process Simulation Tangshan UniversityTangshan 063000Hebei ProvinceChina School of Materials Science and Engineering University of Science and Technology LiaoningAnshan 114051China

Distributions of electromagnetic fields and induced forced flow inside a metal melt are crucial to understand the grain refinement of the metal driven by pulsed magneto-oscillation(PMO).In the present study,PMO-induced electromagnetic fields and forced flow in Ga-20 wt%In-12 wt%Sn liquid metal have been systematically investigated by performing numerical simulations and corresponding experimental *** numerical simulations have been confirmed by magnetic and melt flow *** to the simulated distribution of electromagnetic fields under the application of PMO,the strongest magnetic field,electric eddy current and Lorentz force with inward radial direction inside the melt are concentrated adjacent the sidewall of cylindrical melt at the cross section of middle height of *** a result,a global forced flow throughout the whole cylindrical column filled with Ga-20 wt%In-12 wt%Snmelt is initiated with a flow structure of two pair of symmetric *** PMO-induced electromagnetic fields and forced flow in Al-7 wt%Si melt have been numerically *** contribution of electromagnetic fields and forced flow to the grain refinement of Al-7 wt%Sialloy under the application of PMO is *** indicates that the forced flow may play a key role in the grain size reduction.

关键词： Pulsed magneto-oscillation(PMO) Electromagnetic field Forced flow Solidification Grain refinement

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