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SSRN 2024年

作者： Kim, Minje Beak, Jongsu Kim, Sunjae Cho, Byung Jin Hwang, Wan Sik Department of Materials Science and Engineering Korea Aerospace University Goyang10540 Korea Republic of Department of Smart Air Mobility Korea Aerospace University Goyang10540 Korea Republic of School of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of

Understanding and controlling the effects of trap sites in ZnO semiconductors are crucial for optimizing device performance and enabling various technological applications. To passivate the trap sites, the N atoms are incorporated into polycrystalline ZnO thin films via a plasma nitridation (PN) process using NH3 gas. The results show that the contact resistivity, sheet resistance, and transfer length of the ZnO photodetector are improved after the PN treatment. The photo-to-dark current ratio (PDCR) and responsivity values increase from 42.52 to 103.19 and from 344.36 A/W to 5727.63 A/W, respectively, after the PN treatment. This improvement in photodetector properties is attributed to the introduced N atoms, which effectively reduce the trap sites in the ZnO thin film. This PN treatment technology has the potential to improve device performance in both electronic and optoelectronic applications. © 2024, The Authors. All rights reserved.

关键词： Zinc oxide

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Sustainable Microgrids: TLBO Driven Multi Objective Optimization Modeling for Cost Effective Emission-Embedded Solution

Sustainable Microgrids: TLBO Driven Multi Objective Optimiza...

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International Conference on Power Electronic Drives

作者： Manisha Vikash Kumar Saini Meena Kumari Ameena S. Al-Sumaiti Rajesh Kumar Department of Electrical Engineering UIET Maharshi Dayanand University Smart OR Lab Advanced Power and Energy Center Khalifa University Abu Dhabi UAE Department of Artificial Intelligence University of Johannesburg South Africa Department of Electrical Engineering RAMAN Lab Malaviya National Institute of Technology Jaipur India

ISBN: (数字)9798350372472

ISBN: (纸本)9798350372489

This research integrates renewable energy resources into microgrid systems to address cost, emissions, and reliability concerns. Employing multi-objective optimization, the Teaching-Learning-Based Optimization (TLBO) algorithm emerges as highly effective, achieving substantial cost and greenhouse gas reductions. TLBO showcases rapid convergence and superior performance for the proposed microgrid architecture, offering valuable insights for sustainable energy planning. The proposed microgrid architecture includes micro-turbine (MT), a solar photovoltaic (PV) system, a wind turbine (WT), and a battery energy storage system (BESS). The numerical results of the proposed system compared with load supplied by main grid. The achieved cost savings of the proposed system is 66.85 % and GHG cost savings is 67.77% compared to load supplied by grid.

关键词： Renewable energy sources Costs System performance Microgrids Planning Wind turbines Reliability Greenhouse gases Optimization Convergence

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Anchoring Ordered Ptzn Nanoparticles on Mof-Derived Carbon Support: Towards Highly Active and Durable Catalysts for Proton Exchange Membrane Fuel Cells

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SSRN 2024年

作者： Lee, KwangHo Lee, Eoyoon Chang, HyunWoo Roh, Jeonghan Lee, SangJae Bak, Junu Kwon, YongKeun Ham, Hyung Chul Cho, EunAe Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology 291 Daehak-Ro Yuseong-gu Daejeon34141 Korea Republic of Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy and Materials Inha University Incheon22212 Korea Republic of

Despite the superior catalytic activity of ordered Pt-M nanoparticles for the oxygen reduction reaction (ORR), challenges such as particle growth during the ordering transformation and insufficient durability over extended operation hinder their application in polymer electrolyte membrane fuel cells (PEMFCs). In this study, a zeolitic imidazolate framework-8 (ZIF-8) is pyrolyzed into zinc and nitrogen-doped carbon (ZnNC). Pt nanoparticles are synthesized on the ZnNC and underwent heat treatment, transforming into ordered PtZn nanoparticles (O-PtZn). Through this simple process, well distributed O-PtZn nanoparticles are obtained with an average particle size of approximately 4.5 nm. The O-PtZn/ZnNC achieves outstanding ORR mass activity and durability compared to the corresponding value of Pt/C both in a half-cell and in a single-cell configuration. Density functional theory calculations illustrate that ZnNC has a strong binding energy with O-PtZn and a minimum distance, resulting in exceptional electrochemical active surface area retention of O-PtZn/ZnNC. © 2024, The Authors. All rights reserved.

关键词： Synthesis (chemical)

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Phase Evaluation and Temperature Stability in BaTiO3-BiScO3 Modified Na0.5Bi0.5Tio3 Lead-Free Ceramics

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SSRN 2024年

作者： Muniyandi, Muneeswaran Won Lee, Hae Won Kim, Na Yeon Kim, Na Lim, Young Soo Department of Smart Green Technology Engineering Pukyong National University Busan48513 Korea Republic of Department of Physics School of Advanced Sciences VIT-AP University Andhra Pradesh Amaravati522237 India Department of Materials System Engineering Pukyong National University Busan48513 Korea Republic of

Structural and dielectric thermal stability in (1-2x)Na0.5Bi0.5TiO3 (NBT)-xBaTiO3 (BT)-xBiScO3 (BS) for x = 0.01, 0.03, 0.05, 0.07 and 0.09 lead free ceramics were first investigated. X-ray diffraction studies revealed composition-driven phase transitions in NBT-BT-BS ceramics, wherein the crystal structure changed from rhombohedral to a mixed phase of cubic and tetragonal with increasing x. Dielectric measurements showed a low temperature dielectric dispersion and a high temperature dielectric maxima for all the ceramic samples. This was attributed to the presence of two types of polar nano region (PNR), such as low-temperature PNRs and high-temperature PNRs. The composition of x = 0.05 exhibited a relatively high permittivity of 3250 at 250 °C (10 kHz) maintaining thermal stability varying no more than ±15% from temperature range of 168-400 °C. These results suggest that the addition of BT-BS to the NBT ceramics may also be suitable candidates for high-temperature capacitor applications. © 2024, The Authors. All rights reserved.

关键词： X ray diffraction

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Anchoring Ordered Ptzn Nanoparticles on Mof-Derived Carbon Support for Efficient Oxygen Reduction Reaction in Proton Exchange Membrane Fuel Cells

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SSRN 2024年

Despite their superior catalytic activity for the oxygen reduction reaction (ORR), ordered platinum (Pt)-transition metal nanoparticles suffer from limitations that hinder their use in polymer electrolyte membrane fuel cells (PEMFCs), such as particle growth during the ordering transformation and insufficient durability over extended operation. In this study, a zeolitic imidazolate framework-8 (ZIF-8) is pyrolyzed into zinc and nitrogen-doped carbon (ZnNC). Pt nanoparticles are synthesized on the ZnNC and undergo heat treatment. Through this simple process, ordered PtZn nanoparticles are obtained with an average particle size of approximately 4.5 nm (O-PtZn/ZnNC). In a half-cell, the O-PtZn/ZnNC achieves outstanding ORR mass activity (1.21 A mgPt-1 at 0.9 V) and durability (35% loss of mass activity after 30k cycles), significantly surpassing Pt/C (0.41 A mgPt-1 and 61% loss). As a cathode catalyst of a PEMFC, the O-PtZn/ZnNC outperforms Pt/C in both performance and durability;O-PtZn/ZnNC and Pt/C cells exhibit current densities of 71 and 39 mA cm-2, respectively, at a cell voltage of 0.8 V. These values fall to 43 (-39%) and 11 (-72%) mA cm-2, respectively, after 30k cycles. Density functional theory calculations illustrate that ZnNC has a strong binding energy with O-PtZn (-8.13 eV) and a small interfacial minimum distance of 2.03 Å, resulting in exceptional retention of electrochemical active surface area retention for O-PtZn/ZnNC (-7%, from 57.9 to 53.8 m2 gPt-1, after 30k cycles). © 2024, The Authors. All rights reserved.

关键词： Electrolytic reduction

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A Hybrid Model for Real-Time Traffic Prediction with Augmented Historical Data Using Traffic Simulation

A Hybrid Model for Real-Time Traffic Prediction with Augment...

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International Conference on Intelligent Transportation

作者： Hye-young Tak Yeeun Kim Sunghoon Kim Hwasoo Yeo Department of Civil and Environmental Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea Department of Mobility Transformation Center for Smart City and Transport Korea Transport Institute Sejong Republic of Korea

Real-time traffic prediction offers valuable tools for efficient traffic operation through timely and accurate information to road users and agencies. Despite the prevalence of data-driven approaches in traffic prediction with the advent of big data, these methods struggle to respond to unforeseen traffic situations during real-time prediction. To address this issue, we propose a hybrid model that integrates both data-driven and model-based approaches. Our model augments historical data using traffic simulation for unexpected traffic situations such as sudden speed drops on a road section, which can cause significant prediction errors. An artificial neural network is used to balance between the collected historical data and the augmented data. The proposed model was evaluated by predicting traffic conditions of an actual road section and significantly improved prediction accuracy. Our proposed method represents a state-of-the-art solution for enhancing real-time traffic prediction under the hybrid framework.

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New Decision-Making Technique Based on Hurwicz Criteria for Fuzzy Ranking

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Computers, Materials & Continua 2022年第12期73卷 4595-4609页

作者： Deepak Sukheja Javaid Ahmad Shah G.Madhu K.Sandeep Kautish Fahad A.Alghamdi Ibrahim.S.Yahia El-Sayed M.El-Kenawy Ali Wagdy Mohamed Department of Computer Science and Engineering VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadIndia Department of Mathematics Dr.APJ Abdul Kalam University Indore(M.P)India Department of Information Technology VNR Vignana Jyothi Institute of Engineering and TechnologyHyderabadIndia LBEF Campus Kathmandu44600Nepal Department of Management Information Systems College of Applied Studies and Community ServiceImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Laboratory of Nano-Smart Materials for Science and Technology(LNSMST) Department of PhysicsFaculty of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Nanoscience Laboratory for Environmental and Biomedical Applications(NLEBA) Semiconductor Lab.Department of PhysicsFaculty of EducationAin Shams UniversityRoxyCairo 11757Egypt Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Department of Mathematics and Actuarial Science School of Sciences Engineering The American University in CairoEgypt

Efficient decision-making remains an open challenge in the research community,and many researchers are working to improve accuracy through the use of various computational *** this case,the fuzzification and defuzzification processes can be very *** is an effective process to get a single number from the output of a fuzzy *** defuzzification as a center point of this research paper,to analyze and understand the effect of different types of vehicles according to their *** this paper,the multi-criteria decision-making(MCDM)process under uncertainty and defuzzification is discussed by using the center of the area(COA)or ***,to find the best solution,Hurwicz criteria are used on the defuzzified ***-making technique is proposed using Hurwicz criteria for triangular and trapezoidal fuzzy *** proposed technique considers all types of decision makers’perspectives such as optimistic,neutral,and pessimistic which is crucial in solving decisionmaking problems.A simple case study is used to demonstrate and discuss the Centroid Method and Hurwicz Criteria for measuring risk attitudes among *** significance of the proposed defuzzification method is demonstrated by comparing it to previous defuzzification procedures with its application.

关键词： Defuzzification decision-making fuzzy numbers Hurwicz multicriteria decision-making ranking order

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Bioinspired super-hydrophilic zwitterionic polymer armor combats thrombosis and infection of vascular catheters

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Bioactive Materials 2024年第7期37卷 493-504页

作者： You Ke Haotian Meng Zeyu Du Wentai Zhang Qing Ma Yuting Huang Linxian Cui Yifeng Lei Zhilu Yang Dongguan Key Laboratory of Smart Biomaterials and Regenerative Medicine The Tenth Affiliated HospitalSouthern Medical UniversityDongguanGuangdong523000China School of Materials Science and Engineering Key Lab of Advanced Technology for Materials of Education MinistrySouthwest Jiaotong UniversityChengduSichuan610031China Geriatric Diseases Institute of Chengdu/Cancer Prevention and Treatment Institute of Chengdu Department of CardiologyChengdu Fifth People’s Hospital(The Second Clinical Medical CollegeAffiliated Fifth People’s Hospital of Chengdu University of Traditional Chinese Medicine)ChengduSichuan611137China The Institute of Technological Science Wuhan UniversityWuhan430072China

Thrombosis and infection are two major complications associated with central venous catheters(CVCs),which significantly contribute to morbidity and *** coating strategies currently represent an efficient approach for addressing such ***,existing antifouling coatings have limitations in terms of both duration and ***,we propose a durable zwitterionic polymer armor for *** armor is realized by pre-coating with a robust phenol-polyamine film inspired by insect sclerotization,followed by grafting of poly-2-methacryloyloxyethyl phosphorylcholine(pMPC)via in-situ radical *** resulting pMPC coating armor exhibits super-hydrophilicity,thereby forming a highly hydrated shell that effectively prevents bacterial adhesion and inhibits the adsorption and activation of fibrinogen and platelets in *** practical applications,the armored catheters significantly reduced inflammation and prevented biofilm formation in a rat subcutaneous infection model,as well as inhibited thrombus formation in a rabbit jugular vein ***,our robust zwitterionic polymer coating presents a promising solution for reducing infections and thrombosis associated with vascular catheters.

关键词： Anti-infection Antithrombosis Phenol-polyamine Super-hydrophilicity Zwitterionic polymers

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Explicit Model Predictive Control for Trajectory Tracking of Autonomous Vehicle

Explicit Model Predictive Control for Trajectory Tracking of...

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Chinese Automation Congress (CAC)

作者： Xiangkang Lai Haolong Jiang Qinyao Liu Qian Guo Xuchen Wang School of Advanced Technology Xi'an Jiaotong Liverpool University Suzhou China Department of Mechatronics and Robotics School of Advanced Technology Xi'an Jiaotong Liverpool University Suzhou China Institute of Intelligent Manufacturing and Smart Transportation Suzhou City University Suzhou China Department of Electrical and Electronic Engineering School of Advanced Technology Xi'an Jiaotong Liverpool University Suzhou China

Autonomous vehicle has been attached more and more attention since it is considered as an effective solution to transportation problems. This paper focuses on the trajectory tracking control algorithms for autonomous vehicles. To improve the computational efficiency, a constrained explicit controller with offline optimization and online search is proposed based on the original model predictive control (MPC) algorithm. The joint simulation based on the Simulink and Carsim is designed to evaluate the performance of proposed explicit controller. The results show that compared with the original MPC controller, the explicit controller can significantly reduce optimization time and achieve relatively similar tracking performance.

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Capacitor Voltage Balancing Strategy Based on Zero-Sequence Voltage Injection for Half-Wave Commutated Modular Multilevel Converter 10

Capacitor Voltage Balancing Strategy Based on Zero-Sequence ...

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10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Fu, Nan Liu, Bao Xu, Yunfei Zhu, Sitong Wang, Kui Li, Yongdong Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Beijing100084 China State Grid Smart Grid Research Institute Co. Ltd State Key Laboratory of Advanced Power Transmission Technology Changping Beijing China Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd. Shenyang110000 China

ISBN: (纸本)9798350351330

Half-wave commutated modular multilevel converter (HWC-MMC) is suitable for high-voltage large-capacity AC-AC conversion, and an appropriate capacitor voltage balancing strategy is essential. This paper analyzes the condition of capacitor voltage balancing and proposes a capacitor voltage balancing strategy based on optimal zero-sequence voltage injection using the model predictive control. Finally, the simulation is carried out to verify the proposed strategy. © 2024 IEEE.

关键词： Model predictive control

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