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3rd International Conference on Sustainable Civil engineering and Architecture, ICSCEA 2023

作者： Zhang, Ye Ogawa, Yuko Goegre, Riya Catherine Kawai, Kenji Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima Japan

ISBN: (纸本)9789819974337

Non-proprietary ultra-high-performance concrete (UHPC) is renowned for excellent mechanical properties, especially high compressive strength which is generally above 150 MPa. Despite the high compressive strength, the failure mode of non-proprietary UHPC under axial loading is sudden, brittle, and explosive. The undesired compression failure mode is not ideal for structure design and undermines the engineering value of non-proprietary UHPC. This research targets to convert the compression failure mode of non-proprietary UHPC from brittle to ductile with hybrid steel fiber reinforcement and select the most effective reinforcing proportion. In this research, a ground granulated blast-furnace slag (GGBS) based non-proprietary UHPC mix is reinforced with five combinations of two steel fiber types with straight ends. The lengths of the two steel fibers are 6.5 mm and 13 mm. The total volume fraction of steel fibers is 2%. The 28-day compressive strengths and the failure modes of the reinforced samples are compared to select a hybrid steel fiber combination that transforms the failure mode of non-proprietary UHPC and strengthens the compression performance most effectively. The experiment results demonstrate that: (1) with steel fibers presented, non-proprietary UHPC is capable of continuously taking compressive load after matrix cracks;(2) instead of explosive brittle failure mode, fiber reinforced non-proprietary UHPC fails in a ductile behavior under axial compression load and the samples stay in integrity;(3) hybrid steel fiber reinforcement is more effective than single type steel fiber reinforcement in improving the compression performance of non-proprietary UHPC. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Compressive strength

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Economic Feasibility Analysis and Breakeven Point Estimation of Microgrid System Combinations Under Carbon Fee Policies 4

Economic Feasibility Analysis and Breakeven Point Estimation...

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4th IEEE International Conference on Recent Advances in Systems science and engineering, RASSE 2024

作者： I-Hua, Chung Chin-Pao, Chu Ming-Jun, Zhang Master's Program in Offshore Wind Energy Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

ISBN: (数字)9798331528263

ISBN: (纸本)9798331528263

This study delves into the economic feasibility of various energy system combinations under the influence of carbon fee policies, using a convenience store located in the Changbin Industrial Park as a representative case. The primary focus is analyzing the intricate relationship between the Levelized Cost of Energy (LCOE) and carbon fees. In light of the growing importance of sustainable energy practices, this research explores how different combinations of renewable energy sources and storage systems can be optimized within the context of evolving carbon fee regulations. The findings underscore the pivotal role of carbon fees as a decisive factor in determining the economic viability of microgrid systems. Specifically, when the carbon fee escalates to NT$3000/tCO2e, certain system configurations, such as GPWL (Grid-Photovoltaic-Wind-Lithium) and GPWF (Grid-Photovoltaic-Wind-Flow Battery), emerge as economically viable options. However, the feasibility of these systems is significantly influenced by the prevailing costs of green electricity procurement, which can either enhance or limit their attractiveness. Moreover, the study introduces a regression analysis model capable of accurately predicting fluctuations in energy costs across different carbon fee scenarios. This model provides a robust analytical tool for decision-makers, enabling them to anticipate the financial implications of policy changes on energy systems. The insights derived from this research are particularly valuable for businesses and policymakers, offering a hopeful vision of a future with cost-effective and sustainable energy solutions. © 2024 IEEE.

关键词： Clean energy

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Hybrid Solution to Remediate Groundwater Contaminated by Petroleum-Hydrocarbons

Hybrid Solution to Remediate Groundwater Contaminated by Pet...

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2024 SPE Water Lifecycle Management Conference and Exhibition, WLMC 2024

作者： Alahmari, M.M. Humam, A.A. Zefzafy, I.M. Sanchez-Huerta, C. Hong, P.-Y. Zhang, S. Saudi Aramco's EXPEC Advanced Research Center Dhahran Saudi Arabia Environmental Science and Engineering Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia

ISBN: (纸本)9781959025320

Groundwater contamination by petroleum-hydrocarbons is a serious environmental problem. Crude oil is a complex mixture of hydrocarbons with serious environmental and health risks. Thus, remediation of groundwater from petroleum hydrocarbon contamination is an emerging priority. Current approaches to remediate hydrocarbon contamination include physical and chemical methods. However, most of these approaches have a limited application for in-situ groundwater remediation. This study aims to develop a sustainable hybrid solution for efficient restoration of groundwater polluted by crude oil, providing a source of high-quality groundwater stream. Hybrid solution compromises in-situ addition of biosurfactant followed by a flow through electrochemical reactor installed in the groundwater well. The proposed hybrid solution comprises a two-stage process evaluated through lab-scale experiments treating crude oil that was mixed with synthetic water, mimicking groundwater contamination by petroleum-hydrocarbons. For biosurfactant optimization, glass flasks containing synthetic groundwater and crude oil were supplemented with biosurfactant BS, and C added at the three surfactants: oil (S:O) ratios 1:5, 1:10, and 1:50. Two temperature (25-35 °C) conditions were analyzed to simulate groundwater environment. The change in the crude oil layer thickness total petroleum hydrocarbon concentration (TPH) was continuously monitored for 60 days. Electron Oxidation was carried out where Boron-dopped diamond (BDD) anode and titanium cathode plates, were fitted into a 1 L reactor containing groundwater, crude oil and biosurfactant. Kinetic analysis at three constant currents (20, 30 and 40 mA/cm2) was performed. Samples were collected at regular intervals along 120 min to determine changes in TPH, COD and pH. The performance of biosurfactant BS and C in reducing the thickness of crude oil layer was influenced by different parameters including temperature, and S:O ratio. The increase in temper

关键词： Groundwater

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Enhancing Healthcare Monitoring Systems: A Case Analysis in Optimization 18

Enhancing Healthcare Monitoring Systems: A Case Analysis in ...

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18th INDIAcom;11th International Conference on Computing for Sustainable Global Development, INDIACom 2024

作者： Lalit, Mohit Bathla, Gaurav Singh, Surender Chandigarh University Computer Science and Engineering Department Mohali India Career Program Code Quotient Mohali India

ISBN: (纸本)9789380544519

In the past few years, fog computing (FC) has emerged as a promising complement to cloud computing. It offers reduced latency, minimal bandwidth consumption, and real-time data transfer. In healthcare, particularly in IoT-enabled systems, FC integration has become pivotal for real-time monitoring and immediate data transfer to health experts. The researchers all around the world proposed and developed various communication frameworks and come up with certain outputs in terms of quality-of-service parameters (QoS). However, these QoS parameters are not always appropriate for effective execution of the application. Following that, this study explores the integration of FC with multi-objective Optimization Algorithms (such as FFLY and GWO) to optimize crucial quality of service (QoS) metrics using a proposed linear function to optimize multi objectives, essential for sustained communication. The research focuses on optimizing multi objectives in healthcare monitoring systems. Experimental results reveal the superiority of the Grey Wolf Optimizer (GWO) over the Firefly Algorithm (FFLY). This study emphasizes the crucial significance of multi-objective optimisation algorithms in optimizing critical parameters for successful healthcare communication frameworks, which can lead to improvements in healthcare monitoring efficiency. © 2024 Bharati Vidyapeeth, New Delhi.

关键词： Fog Computing Healthcare 4.0 Industry 4.0 IoT Optimization

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Sulfur-doped hard carbon hybrid anodes with dual lithium-ion/metal storage bifunctionality for high-energy-density lithium-ion batteries

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Carbon Energy 2023年第1期5卷 71-81页

作者： Sungmin Cho Jong Chan Hyun Son Ha Yeonhua Choi Honggyu Seong Jaewon Choi Hyoung-Joon Jin Young Soo Yun Program in Environmental and Polymer Engineering Inha UniversityIncheonSouth Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSouth Korea Departmant of Chemistry and Research Institute of Natural Science Gyeongsang National UniversityJinjuSouth Korea Department of Polymer Science and Engineering Inha UniversityIncheonSouth Korea Division of Energy Engineering Kangwon National UniversityGangwon-doSouth Korea

Bifunctional hybrid anodes(BHAs),which are both a high-performance active host material for lithium-ion storage as well as a guiding agent for homogeneous lithium metal nucleation and growth,exhibit significant potential as anodes for next-generation high-energy-density lithium-ion batteries(LIBs).In this study,sulfur-doped hard carbon nanosphere assemblies(S-HCNAs)were prepared through a hydrothermal treatment of a liquid organic precursor,followed by high-temperature thermal annealing with elemental sulfur for application as BHAs for *** a carbonate-based electrolyte containing fluoroethylene carbonate additive,the S-HCNAs showed high lithium-ion storage capacities in sloping as well as plateau voltage sections,good rate capabilities,and stable *** addition,high average Coulombic efficiencies(CEs)of~96.9%were achieved for dual lithium-ion and lithium metal storage *** the LIB full-cell tests with typical NCM811 cathodes,the S-HCNA-based BHAs containing~400 mA h g^(−1) of excess lithium led to high energy and power densities of~500Wh kg^(−1) and~1695Wkg^(−1),respectively,and a stable cycling performance with~100%CEs was achieved.

关键词： hard carbon hybrid anode lithium-ion batteries lithium metal anode lithium metal batteries sulfur-doped carbon

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Analysis of Renewable Energy Potential Combinations in Microgrid Systems 4

Analysis of Renewable Energy Potential Combinations in Micro...

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4th IEEE International Conference on Recent Advances in Systems science and engineering, RASSE 2024

作者： I-Hua, Chung Chin-Pao, Chu Ming-Jun, Zhang Master's Program in Offshore Wind Energy Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

ISBN: (数字)9798331528263

ISBN: (纸本)9798331528263

In response to the growing global and local demand for net-zero carbon emissions, this study thoroughly explores the feasibility of implementing microgrid technology in convenience stores across Taiwan to reduce carbon emissions and enhance overall energy sustainability significantly. The research emphasizes the integration of renewable energy sources, specifically solar and wind power, aligning with Taiwan's strategic initiatives in promoting renewable energy development. Utilizing the HomerPro simulation tool, the study conducts an in-depth assessment of various energy combinations, evaluating their performance under various conditions, including different carbon pricing scenarios, grid reliability factors, and essential financial variables such as discount rates and inflation. A total of 256 system configurations were simulated to identify the most economically viable and environmentally sustainable solutions for these convenience stores. The study provides a comprehensive understanding of the impact of these variables on the financial and operational feasibility of microgrid systems. The findings are crucial for informing policymakers, energy planners, and business owners, offering practical guidance for designing and implementing effective energy strategies within Taiwan's convenience store sector. By advocating for the adoption of microgrid technology, this study contributes to Taiwan's broader goals of achieving carbon neutrality and improving energy security and plays a key role in reducing dependence on conventional grid systems. This work supports transitioning to a more sustainable, resilient, and future-proof energy infrastructure. © 2024 IEEE.

关键词： Zero-carbon

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Cost-Effectiveness Analysis of Solar and Wind Power Generation in Microgrid Systems: A Case Study of Changbin Industrial Zone 4

Cost-Effectiveness Analysis of Solar and Wind Power Generati...

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4th IEEE International Conference on Recent Advances in Systems science and engineering, RASSE 2024

作者： I-Hua, Chung Chin-Pao, Chu Ming-Jun, Zhang Master's Program in Offshore Wind Energy Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

ISBN: (数字)9798331528263

ISBN: (纸本)9798331528263

The study centers on a comprehensive cost-effectiveness analysis of solar and wind power generation within the microgrid system located in the Changbin Industrial Zone. This region, characterized by favorable solar irradiance and wind conditions, is an ideal location for developing and implementing renewable energy systems. Through extensive simulations, we examined the impact of temperature fluctuations on photovoltaic (PV) module efficiency and the influence of varying wind turbine heights on energy output. Our findings revealed that temperature plays a crucial role in determining the performance of PV modules, with higher temperatures leading to a noticeable decline in efficiency. Conversely, wind power generation is significantly affected by the height of wind turbines, where increased height results in enhanced energy capture due to stronger and more consistent wind speeds at elevated altitudes. Furthermore, the study underscores the importance of considering seasonal variations, as these can significantly influence the overall efficiency and reliability of renewable energy systems within a microgrid. By optimizing wind turbine heights and incorporating strategies to mitigate the effects of temperature fluctuations on solar panels, the study demonstrates that it is possible to significantly improve the overall power generation efficiency of the microgrid system. Improving efficiency reduces the cost per kilowatt-hour of electricity generated, thereby enhancing the economic viability of renewable energy projects. The insights gained from this analysis are expected to provide valuable guidance for future renewable energy planning, particularly in regions with similar climatic and geographical conditions. Such strategic planning is essential for maximizing the return on investment and ensuring the long-term sustainability of renewable energy systems. © 2024 IEEE.

关键词： Windmill

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Excitation of surface plasmon mode in bulk semiconductor lasers

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Applied Optics 2023年第14期62卷 3690-3695页

作者： Tseng, Chih Lung Wang, Chien Kun Lai, Chih Hsien Tsai, Cheng Hsiung Chiang, Po Jui Interdisciplinary Program of Green and Information Technology National Taitung University Taitung Taiwan Department of Electronic Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology Douliou Taiwan

We propose a realistic process for the excitation of surface plasmon polariton (SPP) modes in a silicon photonic waveguide (WG). The process involves the placement of buried oxide (BOX) composed of silica between a WG and silicon substrate. When the BOX thickness is manipulated, different amounts of modal power leak toward the BOX into the substrate and simultaneously acquire compensation from a semiconductor located on the WG. The compensation related to the leakage can be used to infer transparency gain. Similar to the case for a semiconductor laser cavity, the lowest transparency gain among WG modes can be favored;thus, only one mode can survive in the WG, and it is in the region with the specified BOX thickness. Finally, we propose a credible mechanism suitable for demonstrating the region requirements of the existence of SPP modes. © 2023 Optica Publishing Group.

关键词： Silica

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Impact of Energy Architecture on Assessing Microgrid Construction and Its Economic Benefits for Convenience Stores 7

Impact of Energy Architecture on Assessing Microgrid Constru...

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7th IEEE Eurasian Conference on Educational Innovation, ECEI 2024

作者： Chung, I-Hua Chu, Chin-Pao Zhang, Ming-Jun National Kaohsiung University of Science and Technology Master's Program in Offshore Wind Energy Engineering Kaohsiung Taiwan

ISBN: (纸本)9798350307207

For zero carbon emission, the industry has the pressure of carbon emission reduction. The service industry must also correspond to carbon emission policies. Hence, operators of convenience stores must prioritize the effective reduction of carbon emissions. There are two ways for them to reduce carbon emissions: energy conservation and renewable energy microgrids. Using HomerPro, we simulated the application of a renewable energy microgrid in convenience stores. Then microgrid system combinations were composed of the power grid, wind power, solar photovoltaics, lithium, and flow batteries. We used the 2030 carbon fee set in the Ministry of Environment report as the benchmark for techno-economic assessment to explore the carbon reduction benefits and cost assessments brought by the microgrid system. © 2024 IEEE.

关键词： Carbon

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Chevrel phase: A review of its crystal structure and electrochemical properties

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Progress in Natural science:Materials International 2023年第1期33卷 8-15页

作者： Meng Liu Guocheng Lv Tianming Liu Hao Liu Lingchang Kong Lintao Tian Wenxiu Rao Yuxin Li Libing Liao Juchen Guo Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences(Beijing) School of Science China University of Geosciences Materials Science and Engineering Program University of California-Riverside Department of Chemical and Environmental Engineering University of California – Riverside

Chevrel phase compounds have attracted increasing attention as electrochemical energy storage materials and electro-catalysts. Benefiting from their unique crystal structure, Chevrel phase compounds can not only function as the host structures for reversible intercalation of a broad range of cations, but also exhibit high catalytic activity in electrochemical reduction reactions. Here we provide an overview of recent progress in the development of Chevrel phase materials including new understanding of structural features, synthetic methods, and electrochemical properties. A brief conclusion and perspectives on the future development of Chevrel phase materials are also provided.

关键词： Chevrel phase Electrochemical properties Energy storage Electro-catalysis

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