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arXiv 2022年

作者： Dubiel, Stanislaw M. Żukrowski, Jan AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. A. Mickiewicza 30 Kraków30-059 Poland AGH University of Science and Technology Academic Center for Materials and Nanotechnology al. A. Mickiewicza 30 Kraków30-059 Poland

The study was aimed at determination of the position of the Fe-rich border of the metastable miscibility gap (MMG) and of the solubility limit of Cr in iron at 858 K. Towards this end a Fe73.7Cr26.3 alloy was isothermally annealed at 858 K in vacuum up to 8144 hours and Mössbauer spectra were recorded at room temperature after every step of the annealing. Three spectral parameters viz. the average hyperfine field, , the average isomer shift, , and the probability of the atomic configuration with no Cr atoms in the two-shell vicinity of the probe Fe atoms, P(0,0), gave evidence that the transformation process takes place in two stages. All three parameters could have been well described in terms of the Johnson-Mehl-Avrami-Kolmogorov equation, yielding kinetics parameters. The first stage, associated with the phase decomposition, proceeded much faster than the second stage, associated with the alpha-to-sigma phase transformation. The most reliable estimation of the position of the MMG and that of the value of the Cr solubility limit was obtained from the annealing time dependence of , namely 24.5 at.% Cr for the former and 20.3 at.% Cr for the latter. A comparison of these figures with the recent phase diagrams pertinent to Fe-Cr system was done. © 2022, CC BY-NC-ND.

关键词： Binary alloys

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Advanced Computing Approach for Modeling and Prediction COVID-19 Pandemic

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applied Bionics and Biomechanics 2022年第0期2022卷 6056574页

作者： Morsi, Sami A. Alzahrani, Mohammad Eid Applied College In Abqaiq King Faisal University P.O. Box 400 Al-Ahsa31982 Saudi Arabia Al-Neelain University Sudan Faculty Of Computer Science And Information Technology Al Baha University Saudi Arabia

The emergence of many strains of the coronavirus, including the latest omicron strain, which is spreading at a very high speed, is leading to the World Health Organization's (WHO) concern about the creation of this new mutation. Therefore, there is a strong motivation for modeling and predicting COVID-19 to control the number of cases of the disease. The proposed system for predicting the number of cases of COVID-19 can help governments take precautions to prevent the spread of the disease. In this paper, a statistical logistic growth model was employed to predict the spread of COVID-19 in Australia and Brazil. The datasets were collected from the surveillance systems in Australia and Brazil from March 13, 2020, to December 12, 2021, for 641 days. This proposed method used a tested logistic growth model for the complex spread of COVID-19 and forecasted future values within a time interval of six days. The results of the predicted, cumulative, confirmed cases indicate the robustness and effectiveness of the proposed system, which was categorized by time-dependent dynamics. The coefficient of determination (R) metric was used to evaluate the model to predict COVID-19, and the proposed system scored the highest correlation (R2=99%). The proposed system has the potential to contribute to public health by making decisions about how to prevent the spread of COVID-19. © 2022 Sami A. Morsi and Mohammad Eid Alzahrani.

关键词： COVID-19

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A review on the applications of airborne geophysical and remote sensing datasets in epithermal gold mineralisation mapping

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Geosystems and Geoenvironment 2024年第3期3卷

作者： Aminu, M.B. Adiat, K.A.N. Akinlalu, A.A. Olomo, K.O. Owolabi, T.O. Aliyu, E.O. Department of Earth Sciences Adekunle Ajasin University Akungba Akoko Nigeria Department of Applied Geophysics Federal University of Technology Akure Nigeria Department of Physics and Electronics Adekunle Ajasin University Akungba Akoko Nigeria Department of Computer Science Adekunle Ajasin University Akungba Akoko Nigeria

This paper reviewed the application of airborne geophysical and remote sensing datasets in the mapping of orogenic gold deposits in different geologic settings around the world by examining more than forty publications in peer-reviewed journals. The paper indicates the role of aeromagnetic, aeroradiometric datasets (airborne geophysical) and LandSat and ASTER datasets (remote sensing) in mapping epithermal orogenic gold deposits. The paper further highlighted the importance of understanding the geologic settings of epithermal gold mineralization in terms of the mineral system before mineral mapping can be done. Case studies drawn from fourteen (14) publications were presented to show the successful mapping of epithermal gold deposits using airborne geophysical and remote sensing datasets. However, the challenges of the methods of mapping as presented in the paper indicated the limitations of the methods in terms of ambiguity in interpretation, especially when a single method is used. Also, the cost of data acquisition and the inability of the exploration methods to estimate the tonnage and grade of the epithermal gold deposits pose a limitation to the use of airborne geophysical and remote sensing datasets in epithermal gold mapping. The paper was able to justify the use of the methods solely for mapping, which essentially is to focus exploration on certain areas, thereby, saving time and money. Further analyses on tonnage estimation can be done by wildcat drilling and geochemical analysis in mapped areas obtained from airborne geophysical and remote sensing datasets. In addition, the paper presented new technologies that are less expensive than conventional airborne geophysical methods that are capable of probing deep into the subsurface with higher resolution and the use of integrated techniques of airborne geophysical and remote sensing datasets to cater for the ambiguity associated with exploration data interpretation. The paper finally highlights ongoing resear

关键词： Aeroradiometric data Epithermal gold deposit Ife-Ilesa schist Orogeny Remote sensing

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An equilibrium position in the generalized mathematical model of a system of rigid bodies elastically mounted on an Euler-Bernoulli beam

An equilibrium position in the generalized mathematical mode...

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2020 Dynamic Systems and computer science: Theory and Applications, DYSC 2020

作者： Mizhidon, A. Department of Applied Mathematics East Siberian State University of Technology and Management 40V Klyuchevskaya St. Ulan-Ude670013 Russia Department of Applied Mathematics and Differential Equations Institute of Mathematics and Computer Science Buryat State University 24A Smolin St. Ulan-Ude670000 Russia

The paper considers a generalized mathematical model of a class of mechanical systems, which represent systems of rigid bodies elastically mounted on an Euler-Bernoulli beam. This model has the form of a hybrid system of differential equations having a definite structure and describing the process of transfer (transition) of the system within the frames of some coordinated system chosen. On the basis of the generalized mathematical model, a generalized approach to finding the equilibrium position for mechanical systems, which belong to a given class of systems, in a chosen coordinate system has been proposed. The equilibrium position of a mechanical system is understood as the solution of a definite hybrid system of differential equations, furthermore, this solution does not change with time. The equilibrium position of a mechanical system within a given coordinate system allows one to proceed - by replacement of the variables - to consideration of the generalized mathematical model studied earlier and describing transfer of a system with respect to the equilibrium. © Published under licence by IOP Publishing Ltd.

关键词： Rigid structures

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Leveraging AI and NLP in Chatbot Development: An Experimental Study

Leveraging AI and NLP in Chatbot Development: An Experimenta...

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Frontiers of Information technology (FIT)

作者： Abdul Wahab Paracha Usama Arshad Raja Hashim Ali Zain Ul Abideen Muhammad Huzaifa Shah Talha Ali Khan Ali Zeeshan Ijaz Nisar Ali Abu Bakar Siddique Faculty of Computer Science & Engineering GIK Institute of Engg. Sciences & Technology Topi Pakistan BCMaterials Basque Center for Materials Applications & Nanostructure Leioa Basque Country Spain Dept. of Technology & Software Engineering University of Europe for Applied Sciences Berlin Germany Faculty of Electronic Systems Engineering University of Regina Regina Canada

In the current era of chatbots, this research delves into the advancements in AI chatbots, drawing on artificial intelligence (AI) and natural language processing (NLP) techniques to mimic human-like conversations. A particular focus is given to the potential of chatbots in facilitating multitasking dialogues, offering emotional support, and addressing complex subject matter, all the while respecting user privacy and trust. The implemented chatbot model is trained on a neural network, using Keras and TensorFlow libraries. This model’s performance indicates a considerable dependence on the dataset’s size, with larger datasets leading to better outcomes by providing more extensive language usage and context examples. Additionally, we also analyze the effect of varying architectures and hyperparameters on chatbot performance. The significance of localizing chatbots to adapt to different languages and cultures is also highlighted. While promising, the study identifies areas of improvement, suggesting future research directions in enhancing language capture techniques, expanding training datasets, and integrating emotional intelligence within chatbot systems.

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A Matching Based Escape Routing Algorithm With Variable Design Rules and Multiple Constraints

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IEEE Transactions on computer-Aided Design of Integrated Circuits and Systems 2025年

作者： Chen, Chuandong Lin, Disi Liu, Qinghai He, Huan Lin, Zhifeng Liu, Genggeng Chen, Jianli Chang, Yao-Wen Fuzhou University Department of Microelectronics Fuzhou350108 China Fuzhou University Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Center for Applied Mathematics of Fujian Province Center for Discrete Mathematics Fuzhou350108 China Hangzhou Huawei Enterprises Telecommunication Technologies Co. Ltd Hangzhou310000 China Fuzhou University Center for Discrete Mathematics and Theoretical Computer Science Fuzhou350108 China Fuzhou University College of Computer and Data Science Fuzhou350108 China Fudan University School of Microelectronics Shanghai200433 China National Taiwan University Department of Electrical Engineering Graduate Institute of Electronics Engineering Taipei106 Taiwan

Escape routing is a critical problem in PCB routing, and its quality dramatically affects the cost of the PCB design. Unlike the traditional escape routing that works mainly for the BGA with unique line width and space, this paper presents a high-performance escape routing algorithm to handle problems with variable design rules and multiple constraints. We first propose a novel obstacle-avoiding method to project pins to the boundary and construct a channel projection graph combined with a channel merging technique to handle complex irregular packages. We then construct a bi-projection graph and propose a matching-based hierarchical sequencing algorithm to consider manual constraints. We perform global routing for each pin/differential pair by congestion-avoiding path initializing and rip-up and reroute path optimizing. Finally, a length-aware detail routing algorithm is developed to optimize the line length while ensuring the differential pair constraints. The experimental results on industrial PCB instances show that our algorithm can achieve 100% routability without violating the design rules and constraints, while two state-of-the-art PCB routers, FreeRouting and Allegro, cannot complete escape routing. © 1982-2012 IEEE.

关键词： Printed circuit design

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Comparative analysis of bidirectional DC-DC converters for fuel cell hybrid vehicles 10

Comparative analysis of bidirectional DC-DC converters for f...

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10th International Conference on Power Electronics, Machines and Drives, PEMD 2020

作者： Hasimi, Noass Hinz, Hartmut Schofield, Nigel Faculty of Computer Science and Engineering Frankfurt University of Applied Sciences Frankfurt Germany Department of Engineering and Technology University of Huddersfield Huddersfield United Kingdom

ISBN: (纸本)9781839535635

Fuel cell hybrid vehicles use an electric energy storage system such as a battery that can provide additional traction power. This is needed to improve vehicle operation during acceleration and to avoid dynamic current stress of the fuel cell stack. The battery is used for regenerative braking and is connected to the DC-bus of the drive train via a bidirectional DC-DC converter. This paper investigates non-isolated hard-switched bidirectional DC-DC converters with voltage and current ratings which are common in fuel cell hybrid vehicles. The focus is on the comparative analysis of converters regarding the current and voltage stress as well as on the passive component design. Furthermore, a general evaluation for the use in fuel cell hybrid vehicles is discussed. © PEMD *** right reserved.

关键词： DC-DC converters

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Development of high performance computing systems 27th

Development of high performance computing systems

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27th International Conference on computer Networks, CN 2020

作者： Kozielski, Stanislaw Mrozek, Dariusz Department of Applied Informatics Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Akademicka 16 Gliwice44-100 Poland

ISBN: (纸本)9783030507183

The aim of the work is to present the development trends of high performance computers. The analysis focused on system architecture, processors and computing accelerators used. Particular attention was paid to interconnection networks, connecting system nodes. The problem of energy saving in the construction of large systems was also discussed. The data from the list of 500 largest computer systems was used in the analysis. © Springer Nature Switzerland AG 2020.

关键词： Energy conservation

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Examining the influence of trust and perceived risk on customers intention to use NFC mobile payment system

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Journal of Open Innovation: technology, Market, and Complexity 2023年第2期9卷

作者： Alrawad, Mahmaod Lutfi, Abdalwali Almaiah, Mohammed Amin Elshaer, Ibrahim A. College of Business Administration and Economics Al-Hussein Bin Talal University Ma'an 71111 Jordan Department of Accounting College of Business King Faisal University Al-Ahsa 31982 Saudi Arabia Applied Science Research Center Applied Science Private University Amman 11931 Jordan Department of Computer Networks College of Computer Sciences and Information Technology King Faisal University Al-Ahsa 31982 Saudi Arabia Faculty of Information Technology Applied Science Private University Amman 11931 Jordan Department of Computer Science King Abdullah the II IT School The University of Jordan Amman 11942 Jordan Management Department College of Business Administration King Faisal University Al- Ahsa 31982 Saudi Arabia Faculty of Tourism and Hotel Management Suez Canal University Ismailia 41522 Egypt

The current study investigates how perceived risks and trust factors affect customers' intentions to use mobile payment applications that utilize near-field communication (NFC) technology. The author created a conceptual model that includes five elements: intention to use, perceived risk, process-based trust, characteristics-based trust, and institution-based trust. Data was gathered through an online survey of 469 participants and analyzed using partial least squares structural equation modeling techniques. The results indicate that only three of the four tested constructs significantly impact customers' decisions to use NFC mobile payments: perceived risk, process-based trust, and characteristics-based trust. Additionally, the study found that age and gender do not play a significant role in influencing the model constructs;therefore, the findings of current research highlight how perceived risk and trust have a pivotal role of in shaping customers' intention to use NFC as a mobile payment and how trust can substantially mitigate customers' perceived risk. Hence, this knowledge can aid in developing effective strategies for promoting mobile payment adoption among consumers. © 2023 The Authors

关键词： Characteristics-based trust Institution-based trust mobile payment Near-field communication Perceived risk Process-based trust

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Design and Development of an Integrated Development Environment for the Driving Simulation Software Mave 22nd

Design and Development of an Integrated Development Environm...

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22nd International Conference on Human-computer Interaction, HCI International 2020

作者： Weisenburg, Andreas Barz, Arthur Conrad, Jan HCI2B Group Facility of Computer Science and Micro Systems Technology Hochschule Kaiserslautern – University of Applied Sciences Zweibruecken Germany

ISBN: (纸本)9783030607029

At the University of applied sciences Kaiserslautern, empirical user interface studies in the automotive sector are being conducted at the driving simulation environment K3F. To improve the workflow, the driving simulation software Mave is being developed specifically designed for the setup of empirical automotive studies. A major problem is the use of different technologies for the realization of the different study components. Driving tasks are implemented via scripts;user interfaces are based on Web UI components and virtual environments are defined by several geographic data formats. The sum of these technologies is difficult to handle if a user does not have in-depth technical knowledge. The goal of this contribution is to design and develop an integrated development environment that makes it easier for new users to get started with each of these elements and to make further work more efficient. An easier start is possible by providing many example scenarios that solve different tasks. Working on own scenarios is simplified through an integrated documentation and context-aware code completion. In addition, error sources are reduced by a syntactic validation of code. © 2020, Springer Nature Switzerland AG.

关键词： User interfaces

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