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10th International Conference on Condition Monitoring and Diagnosis, CMD 2024

作者： Makmud, M.Z.H. Michael, M. Rahman, Tuan A. Z. Jamain, Z. Amin, K.N.M. Illias, H.A. Research Group Faculty of Science and Natural Resources Sabah Kota Kinabalu88400 Malaysia Mimos Berhad Mranti Technology Park IoT Systems Lab Bukit Jalil Kuala Lumpur57000 Malaysia College of Engineering Technology Universiti Malaysia Pahang Faculty of Chemical and Process Engineering Technology Pahang Malaysia Faculty of Engineering Department of Electrical Engineering Kuala Lumpur56000 Malaysia

ISBN: (纸本)9788986510225

The development of advanced electrical insulation materials is crucial for the sustainability and efficiency of electrical systems, particularly in high-voltage applications. This study investigates the influence of cellulose nanocrystal (CNC) nanofillers on the dielectric and electrical performance of epoxy composites, aiming to enhance the durability and effectiveness of biomaterial-based electrical insulation. Epoxy samples with varying CNC concentrations (0, 0.5, 1, 3, and 5 wt%) were prepared and characterized. Key performance indicators, including dielectric permittivity, dielectric loss, current-voltage response, and electrical discharge activity, were measured and analyzed. The results demonstrated a clear correlation between reduced real and imaginary permittivity, increased resistance, and improved discharge withstandability, highlighting the effectiveness of CNC as a nanofiller in enhancing the insulating properties of epoxy composites. These findings suggest a promising avenue for developing robust, high-performance electrical insulators capable of meeting the stringent demands of sustainable and environmentally friendly applications. © 2024 The Korean Institute of Electrical Engineers (KIEE).

关键词： Permittivity

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Thermodynamics at microscales: 3D→2D, 1D and 0D

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Green Energy & Environment 2020年第3期5卷 251-258页

作者： Kun Dong Feng Huo Suojiang Zhang State Key Laboratory of Multiphase Complex Systems Beijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China

Today, the laws of traditional thermodynamics are facing challenges when science is growing rapidly toward the microscale-world, even quantum hypothesis. In this work, the thermodynamics of nano-confinement and quantu... 详细信息

关键词： Thermodynamics Confinement Quantum scale Entropy Reduced dimension

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Tunable and Functional Ionic Liquids Embedded Hyper-Crosslinked Polymers as H2o-Tolerant Adsorbents for Highly Efficient Gaseous Toluene Capture

SSRN

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SSRN 2024年

作者： Nie, Xiongfei Qiu, Xinjie Zhang, Ruina Ke, Quanli Liu, Huayan Zhang, Xiangping Lu, Hanfeng Cui, Guokai Zhang, Suojiang Innovation Team of Air Pollution Control Institute of Catalytic Reaction Engineering State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical Engineering Zhejiang University of Technology Hangzhou310014 China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Developing advanced sorbents for efficient aromatic VOCs sorption from humid conditions are highly desired. In this work, a series of tunable and functional ionic liquids embedded hyper-crosslinked polymers (ILHCPs) containing different structures of anion-functional ionic liquids (ILs) with 1,4-dichloroxylene (DCX) as the crosslinker were designed and prepared for highly efficient gaseous toluene adsorption under humidity. These ILHCPs could achieve high surface area (600~900 m2 g−1), high micropore volume (0.1~0.3 cm3 g−1), small average pore size (4~5 nm), and large water contact angle (up to 110°) through tuning the anion structures and the initial IL:DCX molar ratio. Gaseous toluene adsorption isotherms on typical ILHCPs were tested under 298, 308, and 318 K, and a dual-site Langmuir-Freundlich (DSLF) model was used for well describing adsorption isotherms, which can be divided into two contributions for site I and site II. The isosteric heats of gaseous toluene adsorption were calculated. Furthermore, toluene adsorption under different humidity conditions were also tested. Compared with DCX-based self-condensed HCP, toluene adsorption capacity of ILHCPs remained steadily (270 mg g−1) even under 80% humidity. To our best knowledge, this is the first example of tuning functional ILHCPs for efficient H2O-tolerant gaseous toluene adsorption. The method may also open a door to achieving high adsorption efficiency of other volatile organic compounds by functional IL-based porous materials. © 2024, The Authors. All rights reserved.

关键词： Gas adsorption

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Towards A Knowledge Graph-based Exploratory Search for Privacy engineering 8

Towards A Knowledge Graph-based Exploratory Search for Priva...

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8th International Workshop on the Visualization and Interaction for Ontologies, Linked Data and Knowledge Graphs, VOILA! 2023

作者： Herwanto, Guntur Budi Ekaputra, Fajar J. Piroi, Florina Sabou, Marta Faculty of Computer Science University of Vienna Austria Department of Computer Science and Electronics Universitas Gadjah Mada Indonesia Institute of Information Systems Engineering Faculty of Informatics TU Wien Austria Institute of Data Process and Knowledge Management WU Wien Austria

The concept of privacy-by-design has gained considerable attention in the wake of legal requirements that software systems should fulfill. The interconnected knowledge on privacy concepts, legal requirements, and software development artifacts required to implement this concept can be a major burden for organizations. To address this challenge, we propose a knowledge graph-based Exploratory Search system to help organizations complete privacy engineering tasks. We identify major requirements of such systems and develop an Exploratory Search prototype built on privacy engineering knowledge that integrates different information sources. While still preliminary, this work serves as a foundation for future research on integrating privacy knowledge into software development and demonstrates the potential of Exploratory Search systems to support the cognitive process in privacy tasks such as privacy threat identification. © 2023 Copyright for this paper by its authors.

关键词： Knowledge graph

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Concentration fluctuation caused by reaction-diffusion coupling near catalytic active sites

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Chinese Journal of Chemical engineering 2022年第10期50卷 254-263页

作者： Haolei Zhang Mingcan Zhao Yanping Li Chengxiang Li Wei Ge State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalianLiaoning 116023China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100049China

The coupling of reaction and diffusion between neighboring active sites in the catalyst pore leads to the spatiotemporal fluctuation in component concentration,which is very importa nt to catalyst performance and hence its optimal *** dynamics simulation with hard-sphere and pseudo-particle modeling has previously revealed the non-stochastic concentration fluctuation of the reactant/product near isolated active site due to such coupling,using a simple model reaction of A→B in 2D *** topic is further developed in this work by studying the concentration fluctuation due to such coupling between neighboring active sites in 3D *** 3D pore models containing an isolated active site and two adjacent active sites were constructed,*** the isolated site,the concentration fluctuation intensifies for larger pores,but the product yield decreases,and for a given pore size,the product yield reaches a peak at a certain reactant *** two neighboring sites,their distance(d)is found to have little effect on the reaction,but significant to the *** the same reaction competing at both sites,larger d leads to more efficient diffusion and better overall ***,for sequential reactions at the two sites,higher overall performance presents at a smaller *** results should be helpful to the catalyst design and reaction control in the relevant processes.

关键词： Molecular dynamicssimulation Concentration fluctuation Reaction-diffusion coupling Catalyst

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Development of biology learning programs for entrepreneurship through microbiology lectures in educational institutions of the UK: Explanatory research

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Journal of Commercial Biotechnology 2023年第5期28卷 168-181页

作者： Janssen, Lisa Metrakos, Stephanie The Sargent Centre for Process Systems Engineering Imperial College London London United Kingdom Department of Chemical Engineering Imperial College London London United Kingdom

This explanatory research examines the development of biology learning programs for entrepreneurship through microbiology lectures in UK educational institutions. Specifically, it investigates the impact of bio-entrepreneurship learning and problem-based learning on students' attitudes towards bio-entrepreneurship, considering mediating roles of teaching styles and learners' interests. The quantitative methodology was adopted, with 244 students completing a survey questionnaire. Results showed bio-entrepreneurship learning and problem-based learning positively influence attitudes towards bio-entrepreneurship. Furthermore, teaching styles significantly mediated the relationship between learning approaches and attitudes. However, learners' interests did not mediate these associations. The study provides theoretical contributions on intersecting microbiology education and entrepreneurship. Practical implications highlight designing customized bio-entrepreneurship curricula by leveraging problem-based learning and effective instructional techniques. Limitations include contextual focus on the UK and lacking analysis of actual entrepreneurial activities. Further research should examine long-term impacts on career pursuits and compare cross-national effectiveness. © 2023, Journal of Commercial Biotechnology. All rights reserved.

关键词： Microbiology

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Exergy analysis and optimisation of a hybrid solar-geothermal power plant

Exergy analysis and optimisation of a hybrid solar-geotherma...

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作者： Moghaddam, M. Manesh, M.H. Khoshgoftar Blanco Marigorta, Ana M. Division of Thermal Sciences and Energy Systems Department of Mechanical Engineering Faculty of Technology and Engineering University of Qom Qom Iran Department of Process Engineering Universidad de Las Palmas de Gran Canaria Edificio de Ingenierías-Tafira Baja Las Palmas de Gran Canaria35017 Spain

The present study aims at the energy, exergetic, exergoeconomic, exergoenvironmental analysis of a hybrid solar-geothermal power plant. In addition, the emergy-based approach based on exergoeconomic and exergoenvironmental analysis has been performed. Genetic programming and artificial neural networks have been used to generate correlations for objective functions to reduce computational time. Advanced exergy, exergoeconomic, and exergoenvironmental analyses have been done to evaluate the system better based on exogenous/endogenous and avoidable/unavoidable parts of exergy destruction. Thermodynamic simulations have been verified with high accuracy with PetroSIM software and reference data. Results analysis show that the proposed cycle produces about 59.2 MW of net power. © 2023 Inderscience Enterprises Ltd.

关键词： Exergy

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SAFT-γ force field for the simulation of molecular fluids 9: Coarse-grained models for polyaromatic hydrocarbons describing thermodynamic, interfacial, structural, and transport properties

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Journal of Molecular Liquids 2023年 369卷

作者： Fayaz-Torshizi, Maziar Graham, Edward J. Adjiman, Claire S. Galindo, Amparo Jackson, George Müller, Erich A. Department of Chemical Engineering Sargent center for Process Systems Engineering Imperial College London LondonSW7 2AZ United Kingdom

Coarse-grained models of polyaromatic hydrocarbons parametrized by employing the SAFT-γ Mie approach are presented and assessed by comparison with experimental data and all-atom models in their ability to describe liquid densities, isothermal compressibilities, thermal expansivities, viscosities, and interfacial tensions. The structural behaviour characterized by the center of mass and angular radial distribution functions are also benchmarked. The SAFT-γ Mie force field models are shown to deliver quantitatively accurate predictions while promising significant speedups in the computational cost of performing molecular dynamics simulations. © 2022 The Author(s)

关键词： Molecular dynamics

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Study on vapor-liquid equilibrium of H2O-NaOH-CO2-H2S system with ELECNRTL model

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Journal of Molecular Liquids 2024年 416卷

作者： Yu, Pan Wang, Yi Zhao, Jun Li, Feng Zhao, Wenying Xiang, Shuguang Institute of Process Systems Engineering Qingdao University of Science and Technology Qingdao266042 China Petro-Cyber Works Information Technology Co. Ltd Shanghai200120 China

The phase equilibrium principle was employed to simulate the vapor–liquid equilibrium of the CO2 and H2S in aqueous solution containing sodium hydroxide (NaOH). The interaction parameters of the ELECNRTL activity coefficient model were regressed on the base of the experimental solubility of CO2 in NaOH aqueous solutions. The Henry's constants for H2S and CO2 in water were transformed according to the correlations in the literatures, and the dissociation equilibrium constants for H2S and CO2 in water were adopted from published literatures. The solubilities of CO2 and H2S in both water and aqueous solution containing sodium hydroxide were predicted with the established phase equilibrium model, and these predictions are consistent with the experimental data. Moreover, the free energies of dissolution for H2S and CO2 in water were estimated with density functional theory (DFT). The solubility trends derived from DFT are aligned with those predicted by the phase equilibrium model. The proposed phase equilibrium model was further validated by simulating the absorption of CO2 and H2S in the ethylene alkali washing process, a well-established industrial application. The phase equilibrium model provides robust support for simulating the absorption of acidic gases with aqueous solutions containing sodium hydroxide. © 2024 Elsevier B.V.

关键词： Solubility

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Influence of inspiratory resistors on tracheal pressure during ventilation with decelerating flow

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Intensive Care Medicine – Paediatric and Neonatal 2025年第1期3卷 1-10页

作者： Werder, David Stankovic, Nikola Zander, Mark Oliver Serfözö, Peter Erb, Thomas Otto Hammer, Jürg Schmid Daners, Marianne Institute for Dynamic Systems and Control Department of Mechanical and Process Engineering ETH Zurich Zurich Switzerland Department of Anesthesiology University Children’S Hospital Basel University of Basel Basel Switzerland Product Development Group Zurich Department of Mechanical and Process Engineering ETH Zurich Zurich Switzerland Emergency Department Lausanne University Hospital Lausanne Switzerland Department of Pulmonology and Critical Care University Children’S Hospital Basel University of Basel Basel Switzerland

Understanding driving pressure is of general interest in lung mechanics, especially in ventilated neonatal and pediatric patients. The aim of this study was to investigate the effects of endotracheal tube size (ETT) and bi-directional linear flow resistors mimicking different degrees of tube and airway obstruction on tracheal pressure (Ptr) during ventilation with decelerating flow. A mechanical lung simulator with unchanged respiratory mechanics like the mimicked compliance and resistance, three ETTs (inner diameters of 7.5 mm, 5.5 mm, and 3.5 mm), and four different linear flow resistors were alternatively connected to a commercial ventilator operating in pressure-controlled mode. Four resistors mimicking various degrees of ETT obstructions were placed consecutively between the Y-piece and the ETT. Varying sequentially ETT size, resistance, and ventilator settings resulted in 90 sets of measurements. Data acquisition, signal processing, and data analysis were performed using Python. The results clarify that decreasing ETT sizes and increasing flow resistances cause an increase in the time necessary to reach zero-flow conditions both during in- and expiration. This results in a decrease of Ptr at the end of inspiration and an increase of Ptr at the end of expiration, if inspiratory and expiratory times remain unchanged. The degree to which peak inspiratory pressure overestimates Ptr (or plateau pressure) in decelerating flow can be substantial and increases with increasing flow resistance. This highlights the importance of measuring plateau pressure or Ptr to understand pressure dynamics delivered to the lung.

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