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IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： Soraphon Kigsirisin Noppada Teera-Achariyakul Parnjit Damrongkulkamjorn Dulpichet Rerkpreedapong Integrated Engineering Program in Multidisciplinary Center Faculty of Engineering Chiang Mai University Chiang Mai Thailand Department of Electrical Engineering Faculty of Engineering Kasetsart University Bangkok Thailand

ISBN: (数字)9798350318098

ISBN: (纸本)9798350318104

This research presents an evaluation of reliability improvement strategies for power distribution systems in a major urban center. Six specific activities have been chosen for consideration including 1) Conversion from overhead to underground distribution, 2) Replacing all bare conductors with spaced aerial cables, 3) Implementation of protective measures, such as animal guards, to cover all live components, 4) Deployment of overhead ground wires, 5) Installation of reclosers at the city’s periphery to prevent customer interruptions caused by external faults, and 6) Incorporation of load break switches equipped with a Fault Detection, Isolation, and Restoration system (FDIR). Later, the reliability evaluation is performed using the failure rates and repair times before and after improvement. The presented approach is illustrated through an actual distribution feeder supplying a major urban center. Subsequently, the paper quantifies the reliability benefits of those activities by measuring reductions in System Average Interruption Frequency Index (SAIFI), System Average Interruption Duration Index (SAIDI), and Customer-minutes of Interruption (CMI). Additionally, the cost-effectiveness of each activity is assessed and ranked, providing valuable guidance to planners in making informed investment decisions.

关键词： Fault detection Urban areas Wires Power distribution Maintenance engineering Reliability engineering Frequency measurement

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Valorization of Agricultural and Marine Waste for Fabrication of Bio-Adsorbent Sheets

Valorization of Agricultural and Marine Waste for Fabricatio...

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World Environmental and Water Resources Congress 2023: Adaptive Planning and Design in an Age of Risk and Uncertainty

作者： Elshabrawy, Salma O. Mansour, Mohammad Elhussieny, Amal Husien, Shimaa Abdel-Aziz, A.B. Fahim, Irene S. Said, Lobna A. Radwan, Ahmed G. Smart Engineering Systems Research Center Nile Univ Giza Egypt Dept. of Chemical Engineering Faculty of Engineering Alexandria Univ Alexandria Egypt Nanoelectronics Integrated Systems Center Nile Univ Giza Egypt School of Engineering and Applied Sciences Nile Univ Giza Egypt October High Institute for Engineering and Technology Giza Egypt Industrial Engineering Program Smart Engineering Systems Research Center Nile Univ Giza Egypt

ISBN: (数字)9780784484852

ISBN: (纸本)9780784484852

Industrial wastewater often contains considerable amounts of toxic pollutants that would endanger public health and the environment. In developing countries, these toxins are often discharged into natural ecosystems without pretreatment as it requires costly treatment processes, which causes long-term harmful socioeconomic impacts. Employing wastewater treatment plants using physical, biological, and chemical methods to clean the wastewater is considered by many nations the answer to the environmental crises. The treated water could be used for targeting the irrigation systems in its majority, as it is biologically acceptable for that specific use, which economizes the use of freshwater sources for municipal use specifically. This study presents a novel method for fabricating an efficient adsorbent sheet for wastewater treatment. The sheets are fabricated by combining sugarcane bagasse pulp as a scaffold with commercial, naturally activated carbon and bimetallic-prepared adsorbents. Fava beans and algae biomass are utilized in the production of activated carbon because of their high carbon contents, availability, and low cost. The prepared composite sheets are synthesized and investigated for several pollutants' removal such as methyl orange, crystal violet dyes, and chromium heavy metals. These pollutants are selected due to the high discharge amount and toxic effect on aquatic life. FT-IR and SEM analyses are used to characterize the samples. To determine the mechanism of adsorption, the intra-particle diffuse, pseudo-first-order, and pseudo-second-order kinetic models are used to test the experimental data. All the prepared sheets can retain the pollutants, with the best removal efficiency of 96.24% for methyl orange adsorption onto the bio-composite mixed sheet. For methyl orange, the error values and correlation coefficient R2of 0.971 and 0.951 shows that the Temkin isotherm and pseudo-first-order kinetic model, respectively, are capable of providing the highes

关键词： Adsorption

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Interface-mediated sp2−sp3 interconversion in ultrahard diamond-graphite nanocomposites with supertoughness

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Physical Review B 2024年第13期110卷 134107页

作者： Tengfei Xu Zhaorui Liu Dominik Legut Ruifeng Zhang School of Materials Science and Engineering and Center for Integrated Computational Materials Engineering (International Research Institute for Multidisciplinary Science) and Key Laboratory of High-Temperature Structural Materials and Coatings Technology (Ministry of Industry and Information Technology) IT4Innovations Department of Condensed Matter Physics Faculty of Mathematics and Physics

Recently synthesized diamond-graphite nanocomposites, consisting of diamond and graphite nanodomains interlocked via coherent interfaces (termed gradia), exhibit an impressive combination of ultrahigh hardness and superior toughness [Luo et al., Nature (London) 607, 486 (2022)]. This extraordinary finding challenges the prevailing understanding of the widespread trade-off relationship in strong covalent solids, while the toughening mechanism of gradia remains mysterious. Here, we unveil an sp2−sp3 interconversion mechanism, where the graphitization or the bond failures are effectively suppressed through layer-by-layer migration of the interfaces towards diamond (or graphite) domains, which originates from the sequential metallization starting from the diamond atomic layers adjacent to the interface with weakened sp3 hybridization and the associated inverse process, i.e., metal-semiconductor transition of graphite domain (sp2 to sp3 hybridization). These interface-mediated continuous changes in the localized bonding pattern greatly promote the strain-energy dissipation, leading to a profound tolerance for large strains. Moreover, a size-dependent toughening is demonstrated, attributed to detrimental graphitization and interfacial bond breakage that occur under critically small sp2/sp3 thickness. These findings provide guidance for the experimentally rational design of gradia, and the toughening mechanisms arising from interface-induced electronic structure transition also sheds light on the toughening of other hard but brittle materials through heterophase junctions.

关键词： Chemical bonding Electronic structure Plastic deformation Carbon-based materials Diamond Graphite Solid-solid interfaces First-principles calculations

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Machine learning of organic solvents reveals an extraordinary axis in Hansen space as indicator of spherical precipitation of polymers

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Aggregate 2023年第5期4卷 207-213页

作者： Yuta Ihara Hiroshi Yamagishi Masanobu Naito Yohei Yamamoto Department of Materials Science Faculty of Pure and Applied Sciencesand Tsukuba Research Center for Energy Materials Science(TREMS)University of TsukubaTsukubaJapan Research and Services Division of Materials Data and Integrated System(MaDIS) National Institute for Materials Science(NIMS)TsukubaJapan Program in Materials Science and Engineering Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukubaJapan

Machine learning is an emerging tool in the field of materials chemistry for uncovering a principle from large ***,we focus on the spherical precipitation behavior of polymers and computationally extract a hidden trend that is orthogonal to the availability bias in the chemical *** constructing a dataset,four polymers were precipitated from 416 solvent/nonsolvent combinations,and the morphology of the resulting precipitates were *** dataset was subjected to computational investigations consisting of principal component analysis and machine learning based on random forest model and support vector ***,we eliminated the effect of the availability bias and found a linear combination of Hansen parameters to be the most suitable variable for predicting precipitation *** predicted appropriate solvents are those with low hydrogen bonding capability,low polarity,and small molecular ***,we found that the capability for spherical precipitation is orthogonal to the availability bias and forms an extraordinary axis in Hansen space,which is the origin of the conventional difficulty in identifying the *** extraordinary axis points toward a void region,indicating the potential value of synthesizing novel solvents located therein.

关键词： chemical space computational chemistry machine learning polymers precipitation

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Temporal hydrogeochemical evolution of surface water and groundwater in a karst system discharging into a continental-type Ramsar site in the Huasteca Potosina, Mexico

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Environmental Science and Pollution Research 2025年第7期32卷 3912-3950页

作者： Del Carmen Cordova Molina, Cynthia Ortiz Enriquez, Octavio Alfaro-De la Torre, Ma. Catalina Reyes Agüero, Juan Antonio Cardona Benavides, Antonio Multidisciplinary Graduate Program in Environmental Sciences Autonomous University of San Luis Potosi Av. Manuel Nava 201 SLP San Luis Potosí Mexico Engineering Faculty Autonomous University of San Luis Potosi Research and Postgraduate Center Av. Manuel Nava 8 SLP San Luis Potosí Mexico Faculty of Chemical Sciences Autonomous University of San Luis Potosi Av. Manuel Nava 8 SLP San Luis Potosí Mexico Desert Areas Research Institute Autonomous University of San Luis Potosi Altair 200 Col. del Llano SLP San Luis Potosí Mexico Earth Sciences Engineering Faculty Autonomous University of San Luis Potosi Av. Manuel Nava 8 SLP San Luis Potosí Mexico

Ecosystems such as wetlands have karst groundwater as their primary source of preserving their services and functions. Karst systems are complex hydrogeological systems that are difficult to study because of their complicated functioning mechanism, which requires an interdisciplinary effort based on hydrodynamic assessment and characterization of the hydrogeology of the system. The study area is the Ramsar wetland Ciénaga de Tamasopo (Mexico), which is dependent on the discharge of karst groundwater that is affected by water extraction of extensive sugarcane agriculture and is also the main water source for the rural towns. Hydrogeochemical and isotopic tools further suggest that at least two distinct sources contribute to the groundwater composition in the Ciénaga de Tamasopo basin. One corresponds to meteoric water recharging the aquifer through karst structures of the El Abra Fm. and Tamasopo Fm. inferring a local flow with an isotopic composition of δ18O (− 4.75 to − 4.20‰) and δ2H (− 29.12 to − 23.86‰). The second is associated with regional-intermediate flow, indicating that the water has an enrichment of heavy δ18O (− 6.90 to − 6.65‰) and δ2H (− 41.37 to − 40.41‰) isotopes circulating in the Guaxcamá Fm. EC and temperature variations were evaluated, determining that the EC tends to increase in the rainy season because of the mixing of local and intermediate flows and that there is evidence of temperature increase. The chemical analysis identified the dominant processes in this karst system as dissolution–precipitation of calcite, dolomite, and gypsum by water–rock interaction, mixing, and evaporation. This study facilitated the development of a conceptual model for understanding groundwater movement in warm and sub-humid climate karst systems. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Wetlands

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New microbial electrosynthesis system for methane production from carbon dioxide coupled with oxidation of sulfide to sulfate

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Journal of Environmental Sciences 2023年第3期125卷 786-797页

作者： Hiromi Kambara Ha T.T.Dinh Shuji Matsushita Yoshiteru Aoi Tomonori Kindaichi Noriatsu Ozaki Akiyoshi Ohashi Department of Civil and Environmental Engineering Graduate School of EngineeringHiroshima University1–4–1KagamiyamaHigashi-HiroshimaHiroshima 739–8527Japan Faculty of Environment Ho Chi Minh City University of Natural Resources and Environment236 Le Van Sy1 WardTan Binh DistrictHo Chi Minh CityVietnam Agricultural Technology Research Center Hiroshima Prefectural Technology Research Institute6869HaraHachihonmatsuHigashihiroshimaHiroshima 739–0151Japan Program of Biotechnology Graduate School of Integrated Sciences for LifeHiroshima University1–3–1KagamiyamaHigashi-HiroshimaHiroshima 739–8530Japan Department of Civil and Environmental Engineering Graduate School of Advanced Science and EngineeringHiroshima University1–4–1KagamiyamaHigashi-HiroshimaHiroshima 739–8527Japan

Microbial electrosynthesis system (MES) is a promising method that can use carbon dioxide,which is a greenhouse gas,to produce methane which acts as an energy source,without using organic ***,this bioelectrical reduction reaction can proceed at a certain high applied voltage when coupled with water oxidation in the anode coated with metallic *** coupled with the oxidation of HS–to SO_(4)^(2-),methane production is thermodynamically more feasible,thus implying its production at a considerably lower applied *** this study,we demonstrated the possibility of electrotrophic methane production coupled with HS–oxidation in a cost-effective bioanode chamber in the MES without organic substrates at a low applied voltage of 0.2 *** addition,microbial community analyses of biomass enriched in the bioanode and biocathode were used to reveal the most probable pathway for methane production from HS–*** the bioanode,electroautotrophic SO_(4)^(2-)production accompanied with electron donation to the electrode is performed mainly by the following two steps:first,incomplete sulfide oxidation to sulfur cycle intermediates (SCI) is performed;then the produced SCI are disproportionated to HS^(–)and SO_(4)^(2-).In the biocathode,methane is produced mainly via H_(2)and acetate by electronaccepting syntrophic bacteria,homoacetogens,and acetoclastic ***,a new ecofriendly MES with biological H_(2)S removal is established.

关键词： Microbial electrosynthesis system Low applied voltage Organic substrates Methane production Sulfur oxidation

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A Pairwise Based Method for Automated Test Data Generation for $\mathrm{C}/\mathrm{C}++$ Projects

A Pairwise Based Method for Automated Test Data Generation f...

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IEEE International Conference on Research, Innovation and Vision for the Future

作者： Hoang-Viet Tran Lam Nguyen Tung Pham Ngoc Hung Center of Multidisciplinary Integrated Technologies for Field Monitoring (FIMO) University of Engineering and Technology Vietnam National University Hanoi Faculty of Information Technology

ISBN: (纸本)9781665461672

Pairwise testing is an effective test data generation method which is based on an observation where most software errors are caused by interactions of two factors. This testing method maintains a high defect finding ability of the generated test data set whilst keeping a small number of generated test data. This paper presents a method named PMC (a $\boldsymbol{p}$ airwise based test data generation method for $\boldsymbol{C}/\boldsymbol{C}++$ projects) for automated test data generation of unit testing $\mathbf{C}/\mathbf{C}++$ projects. The method employs IPO (in-parameter-order) pairwise test data generation strategy and Eclipse CDT $(\mathbf{C}/\mathbf{C}++$ Development Tooling) library for parsing the given unit source code to get the corresponding abstract syntax tree (AST). By traversing this AST, we retrieve the list of input parameters and simple conditions to generate associated values. These values are used as inputs of IPO strategy to generate the required test data set. Experiments are performed on some common unit functions with a significantly reduced number of generated test data in comparison with the combination test data generation method (CM). We give some discussions about the experimental results in the paper.

关键词： Source coding Computer bugs User interfaces Syntactics Software systems Libraries Communications technology

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Polyethersulfone membrane coated with Dragon blood resin: Effect of input parameters and optimization using response surface methodology

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South African Journal of Chemical engineering 2023年 45卷 30-41页

作者： Ambarita, Aulia Chintia Arahman, Nasrul Bilad, Muhammad Roil Gül, Bahar Yavuztürk Korkut, Sevde Yüksekdağ, Ayşe Teber, Oğuz Orhun Koyuncu, İsmail Mulyati, Sri Doctoral Program School of Engineering Science Syiah Kuala University Banda Aceh Jalan Syeh Abdur Rauf 23111 Indonesia Department of Chemical Engineering Syiah Kuala University Banda Aceh Jalan Syeh Abdur Rauf 23111 Indonesia Faculty of Integrated Technologies Universiti Brunei Darussalam Jalan Tungku Link Bandar Seri Begawan BE1410 Brunei Darussalam National Research Center on Membrane Technologies Istanbul Technical University Istanbul Maslak 34469 Turkey

This study investigates the effectiveness of dragon blood resin (DBR) as a hydrophilic additive to prevent fouling on membrane surfaces. The input parameters, including DBR, Fe³⁺, NMP concentration, and coating time were studied to understand their correlation with response variables, such as permeability, selectivity, and fouling recovery. A central composite design (CCD) to analyze the twenty-one sets of experimental designs. The selected membrane was characterized for hydrophilicity, functional group, morphology, and mechanical properties. The ANOVA result indicates that the p-value for all response models is significant, except for humic acid rejection. The study found that a higher concentration of DBR and NMP, as well as a longer coating time, result in lower permeability, greater humic acid rejection, and higher contact angle, while Fe³⁺ concentration does not have a significant effect. The membrane's surface characteristics did not change significantly after coating, such as chemical function and morphology, while the tensile strength decreased with increasing DBR concentration, NMP, and coating time. The membranes demonstrated good selectivity and antifouling properties, with the optimal condition being 0.223 mg/L DBR, 5 min coating time, 1.65 mg/L Fe³⁺, and 46.19% NMP, resulting in 30.34 L/m².*** of humic acid permeability and 119.6% of fouling recovery. © 2023 The Author(s)

关键词： Antifouling Central composite design Dragon blood resin Polyethersulfone

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Graphene MEMS and NEMS

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Microsystems & Nanoengineering 2024年第5期10卷 1-34页

作者： Kuge Fan Chang He Jie Ding Qiang Gao Hongliang Ma Max CLemme Wendong Zhang Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of Technology100081 BeijingChina Center for Interdisciplinary Science of Optical Quantum and NEMS Integration School of PhysicsBeijing Institute of Technology100081 BeijingChina School of Integrated Circuits and Electronics Beijing Institute of Technology100081 BeijingChina Chair of Electronic Devices Faculty of Electrical Engineering and Information TechnologyRWTH Aachen UniversityOtto-Blumenthal-Str.2552074 AachenGermany AMO GmbH Otto-Blumenthal-Str.2552074 AachenGermany state Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan 030051China National Key Laboratory for Electronic Measurement Technology School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China

Graphene is being increasingly used as an interesting transducer membrane in micro-and nanoelectromechanical systems(MEMS and NEMS,respectively)due to its atomical thickness,extremely high carrier mobility,high mechanical strength,and piezoresistive electromechanical *** devices based on graphene feature increased sensitivity,reduced size,and new *** this review,we discuss the merits of graphene as a functional material for MEMS and NEMS,the related properties of graphene,the transduction mechanisms of graphene MEMS and NEMS,typical transfer methods for integrating graphene with MEMS substrates,methods for fabricating suspended graphene,and graphene patterning and electrical ***,we provide an overview of devices based on suspended and nonsuspended graphene ***,we discuss the potential and challenges of applications of graphene in MEMS and *** to its unique features,graphene is a promising material for emerging MEMS,NEMS,and sensor applications.

关键词： integrating suspended electrical

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An Automated program Repair Method Using Atomic Replacement for Java programs

An Automated Program Repair Method Using Atomic Replacement ...

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IEEE International Conference on Research, Innovation and Vision for the Future

作者： Thi-Huyen Nguyen Van-Hoan Nguyen Hoang-Viet Tran Pham Ngoc Hung Faculty of Information Technology University of Engineering and Technology Vietnam National University Hanoi Center of Multidisciplinary Integrated Technologies for Field Monitoring (FIMO) University of Engineering and Technology Vietnam National University Hanoi

ISBN: (纸本)9781665461672

Automated program repair is one important research area in software engineering which includes methods for automatically fixing programs. This paper proposes a method for fixing bugs related to variable misuses, wrong methods and operators in Java programs. program repairing includes two stages: fault localization and fix generation. In the fault localization stage, suspicious bug locations were identified with the support of a well-known library named GZoltar. After determining the bug location, the fix generation stage is executed. The proposed method focuses on the fix generation stage. The key idea of this method is to generate patches using atomic replacement in an abstract syntax tree. An implemented tool, named AtomRepair supporting the proposed method and experimental results are presented and discussed. The tool was evaluated on Defects4J benchmark and compared with CapGen and FixMiner tools. The results show that the tool can generate correct patches to fix 25/28 bugs with an accuracy of 89.3%, higher than that of CapGen with 84% and FixMiner with 81.3%.

关键词： Location awareness Fault diagnosis Java Computer bugs Maintenance engineering Syntactics Benchmark testing

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