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Dynamical Resource Theory of Informational Nonequilibrium Preservability

Physical Review Letters 2024年第11期132卷 110202-110202页

作者： Benjamin Stratton Chung-Yun Hsieh Paul Skrzypczyk Quantum Engineering Centre for Doctoral Training H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering University of Bristol BS8 1FD United Kingdom H.H. Wills Physics Laboratory University of Bristol Tyndall Avenue Bristol BS8 1TL United Kingdom CIFAR Azrieli Global Scholars Program CIFAR Toronto Canada

Information is instrumental in our understanding of thermodynamics. Their interplay has been studied through completely degenerate Hamiltonians whereby the informational contributions to thermodynamic transformations can be isolated. In this setting, all states other than the maximally mixed state are considered to be in informational nonequilibrium. An important yet still open question is how to characterize the ability of quantum dynamics to preserve informational nonequilibrium. Here, the dynamical resource theory of informational nonequilibrium preservability is introduced to begin providing an answer to this question. A characterization of the allowed operations is given for qubit channels and the n-dimensional Weyl-covariant channels—a physically relevant subset of the general channels. An operational interpretation of a state discrimination game with Bell state measurements is given. Finally, an explicit link between a channel’s classical capacity and its ability to preserve informational nonequilibrium is made.

关键词： Quantum information processing Quantum information theory

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DECIMATION RATIO IN SUBBAND ADAPTIVE IDENTIFICATION OF A TIME-VARYING AR MODEL

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electronicS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL electronic SCIENCE 1994年第11期77卷 78-90页

作者： SHIMIZU, J MIYANAGA, Y TOCHINAI, K Department of Electronic Engineering Faculty of Engineering Hokkaido University Sapporo Japan 060 Jun'ya Shimizu received his B.S. and M.S. degrees from Hokkaido University Sapporo Japan in 1992 and 1994 respectively. Since 1994 he has been in the doctoral program in the Department of Electronic Engineering Hokkaido University. His research interests include adaptive digital signal processing and multirate signal processing. He is a member of the I.E.E.E. (USA).

This paper presents some conditions to determine decimation ratio in subband adaptive identification of a time-varying system. It has been reported in some experiments that a large decimation ratio is not suitable for subband identification of a time-varying system. However, theoretical conditions for a maximally decimated ratio in a time-varying system have not to date been reported. A short-time invariant model is the starting point for this research. The relation between a forgetting factor used in the recursive weighted least-squares (RWLS) algorithm and a time variation of the time-varying system are derived. Then, new forgetting factors are derived for the multirate processing case. Using a convergence property provided by these forgetting factors, theoretical conditions are obtained having parameters estimated from decimated signals that are as accurate as those from all observed signals. The propriety of these conditions is demonstrated using simulations.

关键词： ADAPTIVE SYSTEM IDENTIFICATION IN SUBBANDS DECIMATION RATIO TIME-VARYING MODEL CONVERGENCE PROPERTY MEAN-SQUARE ERROR

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A Comparative Study of Machine Learning Classifiers for Enhancing Knee Osteoarthritis Diagnosis

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Information (Switzerland) 2024年第4期15卷 183页

作者： Raza, Aquib Phan, Thien-Luan Li, Hung-Chung Hieu, Nguyen Van Nghia, Tran Trung Ching, Congo Tak Shing Graduate Institute of Biomedical Engineering National Chung Hsing University Taichung402 Taiwan Department of Physics and Electronic Engineering University of Science Vietnam National University of Ho Chi Minh City Ho Chi Minh City70000 Viet Nam Undergraduate Program of Intellectual Creativity Engineering National Chung Hsing University Taichung402 Taiwan VNU-HCM Ho Chi Minh City72409 Viet Nam Department of Electrical Engineering National Chi Nan University Puli Township545 Taiwan International Doctoral Program in Agriculture National Chung Hsing University Taichung402 Taiwan

Knee osteoarthritis (KOA) is a leading cause of disability, particularly affecting older adults due to the deterioration of articular cartilage within the knee joint. This condition is characterized by pain, stiffness, and impaired movement, posing a significant challenge in medical diagnostics and treatment planning, especially due to the current inability for early and accurate detection or monitoring of disease progression. This research introduces a multifaceted approach employing feature extraction and machine learning (ML) to improve the accuracy of diagnosing and classifying KOA stages from radiographic images. Utilizing a dataset of 3154 knee X-ray images, this study implemented feature extraction methods such as Histogram of Oriented Gradients (HOG) with Linear Discriminant Analysis (LDA) and Min–Max scaling to prepare the data for classification. The study evaluates six ML classifiers—K Nearest Neighbors classifier, Support Vector Machine (SVM), Gaussian Naive Bayes, Decision Tree, Random Forest, and XGBoost—optimized via GridSearchCV for hyperparameter tuning within a 10-fold Stratified K-Fold cross-validation framework. An ensemble model has also been made for the already high-accuracy models to explore the possibility of enhancing the accuracy and reducing the risk of overfitting. The XGBoost classifier and the ensemble model emerged as the most efficient for multiclass classification, with an accuracy of 98.90%, distinguishing between healthy and unhealthy knees. These results underscore the potential of integrating advanced ML methodologies for the nuanced and accurate diagnosis and classification of KOA, offering new avenues for clinical application and future research in medical imaging diagnostics. © 2024 by the authors.

关键词： Extraction

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Open innovation: A technology transfer alternative from universities. A systematic literature review

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Journal of Open Innovation: Technology, Market, and Complexity 2023年第3期9卷

作者： Bejarano, José Bestier Padilla Sossa, Jhon Wilder Zartha Ocampo-López, Carlos Ramírez-Carmona, Margarita Program in Electronic Instrumentation Technology Faculty of Basic Sciences and Technologies Universidad del Quindío Armenia 30004 Colombia Doctoral Program in Management of Technology and Innovation at Universidad Pontificia Bolivariana Medellin 050031 Colombia Department of Engineering Faculty of Agro-Industrial Engineering Universidad Pontificia Bolivariana Medellín 050031 Colombia Center of Studies and Research on Biotechnology (CIBIOT) Faculty of Chemical Engineering Universidad Pontificia Bolivariana Medellín 050031 Colombia

This article presents a study that analyzes open innovation and its contribution to technology transfer processes in universities, addressing as key questions: What elements or factors of open innovation contribute to the performance of technology transfer in universities? What could be the role of open innovation in the technology transfer process of universities? The study was conducted from a systematic literature review in the Scopus, Web of Science, ScienceDirect, and SpringerLink databases on 95 peer-reviewed articles selected from the last 20 years. From an exploratory approach, the critical analysis of the state of knowledge permitted the identification of the 36 factors of open innovation contributing to the performance of technology transfer in universities, from knowledge management and innovation, resources, and capabilities, R&D management with universities, and the university-industry relationship. According to the findings and success cases, open innovation from the use of internal and external knowledge boosts R&D+i projects, encouraging universities to keep close relations with actors from regional innovation systems, contributing positively to the performance of technology transfer in institutions and stimulating the commercialization of the developments generated from research. In the future, we propose delving into outbound open innovation, its systematization, contribution, and impact on university technology transfer processes. © 2023 The Authors

关键词： Entrepreneurial university Higher education institutions Knowledge flow Outbound open innovation Research and development Technology transfer

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Transient stability improvement by fuzzy logic-controlled braking resistor

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International Journal of Power and Energy Systems 2005年第3期25卷 143-149页

作者： Ali, M.H. Soma, Y. Murata, T. Tamura, J. Department of Electrical and Electronic Engineering Kitami Institute of Technology 165 Koen-cho Kitami Hokkaido 090-8507 Japan EEE Dept. RUET Bangladesh JSPS Post-doctoral Fellowship Program Kitami Institute of Technology Japan IEB Japan IEE of Japan Japan IEEE Power Engineering Society Taiwan Japan Technical Software Corporation Japan Kitami Institute of Technology Japan IEE of Japan Society of Instrument and Control Engineers Japan Kitami Institute of Technology Japan

The authors present the results of analyses about transient stability augmentation by the fuzzy logic-controlled braking resistor. Following a major disturbance in electric power systems, variable rotor speed of the synchronous generator is measured, and then the current through the braking resistor is controlled by the firing-angle of the thyristor switch, which is controlled by the fuzzy logic. Thus, the braking resistor controls the accelerating power in generators and makes the system transiently stable. Simulations are performed by using EMTP (Electro-Magnetic Transients program). Through the simulation results of both balanced (3LG: Three-phase-to-ground) and unbalanced (2LG: Double line-to-ground;2LS: Line-to-line;and 1LG: Single line-to-ground) faults, the effectiveness of the fuzzy controlled braking resistor is demonstrated and the optimal conductance value of the braking resistor in enhancing the transient stability is investigated.

关键词： Fuzzy sets

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The Dynamical Resource Theory of Informational Non-Equilibrium

arXiv

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arXiv 2023年

作者： Stratton, Benjamin Hsieh, Chung-Yun Skrzypczyk, Paul Quantum Engineering Centre for Doctoral Training H. H. Wills Physics Laboratory Department of Electrical & Electronic Engineering University of Bristol BS8 1FD United Kingdom H.H. Wills Physics Laboratory University of Bristol Tyndall Avenue BristolBS8 1TL United Kingdom CIFAR Azrieli Global Scholars Program CIFAR Toronto Canada

Information is instrumental in our understanding of thermodynamics. Their interplay has been studied through completely degenerate Hamiltonians whereby the informational contributions to thermodynamic transformations can be isolated. In this setting, all states other then the maximally mixed state are considered to be in informational non-equilibrium. An important yet still open question is: how to characterise the ability of quantum dynamics to maintain informational non-equilibrium? Here, the dynamical resource theory of informational non-equilibrium preservability is introduced to begin providing an answer to this question. A characterisation of the allowed operations is given for qubit channels and the n dimensional Weyl-covariant channels - a physically relevant subset of the general channels. An operational interpretation of a state discrimination game with Bell state measurements is given. Finally, an explicit link between a channels classical capacity and its ability to maintain informational non-equilibrium is made. Copyright © 2023, The Authors. All rights reserved.

关键词： Thermodynamics

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Operational Interpretation of the Choi Rank Through k-State Exclusion

arXiv

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arXiv 2024年

The Choi-state is an indispensable tool in the study and analysis of quantum channels. Considering a channel in terms of its associated Choi-state can greatly simplify problems. It also offers an alternative approach to the characterisation of a channel, with properties of the Choi-state providing novel insight into a channel's behaviour. The rank of a Choi-state, termed the Choi-rank, has proven to be an important characterising property, and here, its significance is further elucidated through an operational interpretation. The Choi-rank is shown to provide a universal bound on how successfully two agents, Alice and Bob, can perform an entanglementassisted exclusion task. The task can be considered an extension of super-dense coding, where Bob can only output information about Alice's encoded bit-string with certainty. Conclusive state exclusion, in place of state discrimination, is therefore considered at the culmination of the super-dense coding protocol. In order to prove this result, a necessary condition for conclusive k-state exclusion of a set of states is presented in order to achieve this result, and the notions of weak and strong exclusion are introduced. Copyright © 2024, The Authors. All rights reserved.

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Finite element analysis of plane wave diffraction from anisotropic dielectric gratings

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electronicS AND COMMUNICATIONS IN JAPAN PART II-electronicS 1996年第1期79卷 1-10页

作者： Ohkawa, Y Tsuji, Y Koshiba, M Faculty of Engineering Hokkaido University Sapporo Japan 060 Received his B.S. and M.S. degrees in 1991 and 1993 respectively from the Department of Electronic Engineering Hokkaido University where he is currently in the doctoral program. He has been engaged in research on opto- and wave electronics. Currently in the doctoral program at Hokkaido University (Department of Electronic Engineering) where he received his B.S. and M.S. degrees in 1991 and 1993 respectively. He has been engaged in research on quantum wave phenomena in semiconductor nanostructures such as quantum wires and quantum dots. Received his B.S. M.S. and Ph.D. degrees in 1971 1973 and 1976 respectively from the Department of Electronic Engineering Hokkaido University. In 1976 he became a Lecturer at Kitami Institute of Technology where he was promoted to an Associate Professor in 1977. In 1979 he became an Associate Professor of the Department of Electronic Engineering Hokkaido University where he was promoted to Professor in 1987. He has been engaged in research on opto- and wave electronics. In 1987 he received a Best Paper Award. He is the author ofFundamentals of Finite Element Method for Opto- and Wave Electronics(Morikita)Optical Waveguide Analysis(Asakura)Optical Waveguide Analysis (McGraw-Hill) andOptical Waveguide Theory by the Finite-Element Method(KTK Scientific Publishers/Kluwer Academic Publishers). He is the co-author of one book and jointly authored six others. He is a member of the Institute of Television Engineers of Japan the Institute of Electrical Engineers of Japan the Japan Society for Simulation Technology the Japan Society for Computational Methods in Engineering and the Japan Society of Applied Electromagnetics. He is also an IEEE Senior Member.

In this paper, the formulation of the analysis based on the finite element method is presented for the first time for an anisotropic dielectric grating. By this analysis method, the diffraction characteristics of a plane wave by an anisotropic dielectric grating with an arbitrary shape can be computed easily. The finite element method is applied to the region corresponding to one period containing an anisotropic dielectric grating. The analytical relationships are applied to the boundaries on the incident and transmitted sides while the periodic boundary condition is applied to all other boundaries. Specifically, an index modulated grating and a groove grating are chosen for the analysis of the diffraction characteristics when the TE and TM waves are coupled. From the comparison with the analysis results by the coupled-mode theory and the spatial harmonic expansion method, the validity of the present method is confirmed.

关键词： diffraction grating anisotropic medium finite element method isoparametric elements Floquet's theorem

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Analysis of nonreciprocal mode-conversion properties of magnetooptic channel waveguides using the finite element method

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electronicS AND COMMUNICATIONS IN JAPAN PART II-electronicS 1996年第10期79卷 32-39页

作者： Zhuang, XP Koshiba, M Tsuji, Y Faculty of Engineering Hokkaido University Sapporo Japan 060 Graduated from the Department of Communication Engineering Guellin Electronic Institute China in 1986. She received her M.S. degree from Hokkaido University in 1991 and was admitted to the doctoral program. She has been engaged in research on the optimum design of magnetooptic waveguides for nonreciprocal optical devices. Graduated in 1971 from the Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1973 and his Dr. of Eng. degree in 1976. In 1976 he became a Lecturer in the Department of Electronic Engineering Kitami Institute of Technology where he was promoted to Associate Professor in 1977. In 1979 he became an Associate Professor at Hokkaido University where he was promoted to Professor in 1987. He has been engaged in research on optical and wave electronics. In 1987 he received a Best Paper Award. He is the author ofFundamentals of Finite Element Method of Optics and Waves(Morigkata Publ.)Optical Waveguide Analysis(Asakura Publ.)Optical Waveguide Analysis(McGraw-Hill Book Co.) andOptical Waveguide Theory by the Finite Element Method(KTK Scientific Publishing/Kulwer Academic Publishers). He is also co-author of one book and has written chapters in six other books. He is a member of the Institute of Television Engineers of Japan the Institute of Electrical Engineers of Japan the Japan Society for Simulation Technology the Japan Society for Computational Methods in Engineering and the Japan Society of Applied Magnetics and Mechanics. He is also an IEEE Senior Member. Graduated in 1991 from me Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1993. He is currently in the doctoral program. He has been engaged in research on quantum wave phenomena and computer-aided design of optical and quantum effect devices.

To evaluate nonreciprocal mode conversion characteristics in a magnetooptic channel waveguide, a finite element analysis based on the scalar wave approximation is formulated for the first time. A simple iterative calculation method is conceived for solution of the nonlinear eigenvalue equations finally obtained in which the two polarizations are coupled. Specifically, the maximum isolation ratio in the mode-conversion-type magnetooptic rib guide was evaluated and the validity of the method is confirmed by comparison with published experimental results.

关键词： nonreciprocal optical devices magnetooptic waveguide nonreciprocal mode conversion finite element method numerical analysis

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Regression Test on the Rotational Speed between Two Loads as the Preparation for Braking System

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Journal of Physics: Conference Series 2013年第1期423卷

作者： B S R Purwanti F Yusivar I Garniwa M K Student of Doctoral Program University of Indonesia Electrical Engineering Department DTE-FTUI INA Lecturer on the Electronic Department Polytechnique State of Jakarta Depok INA University of Indonesia Electrical Engineering Department DTE-FTUI INA

This paper is preparing the mathematic model of braking control, continuously of determination the error (e), delta error (de) of speed reduction [9]. Load-1 and Load-2 are driven by an electric motor located on the same shaft. Both loads are driven clock wise (CW), counter clock wise (CCW) by an asynchronous three-phase motor (M3). The mass of each load is also differentiated to simulate slip phenomena. Rotational speed of M3 is equal to Load-1, detected by Sensor-1, while speed rotation of Load-2 is detected by Sensor-2. The rotation for Load-1 and Load-2 can be adjusted on several position Hj (j = 1, 2, 3). Once Load-1 and Load-2 reach a constant speed, current source will be disconnected. Speed reduction from (ω±1475 rpm) to stagnant (ω=0 rpm) on Load-1 and Load-2 is considered time function. Data collected from both load (ω (t)) known as e, de; on each position of Hj. It uses covariance analysis to make sure that both loads are concurrent with each other against time difference. The objective of this research is to determine slip phenomena of speed reduction of each load. The expectations are to generate smoother braking and minimize the time needed when implemented with ANFIS.

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