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4th International Congress on Human-Computer Interaction, Optimization and Robotic Applications, HORA 2022

作者： Sener, Mert Demir, Gueser Kalayci Graduate School of Natural and Applied Sciences Dokuz Eylul University Izmir Turkey Dokuz Eylul University Department of Electrical and Electronics Engineering Izmir Turkey

ISBN: (纸本)9781665468350

In recent years, Single cell RNA sequencing (scRNA-Seq) has become widely popular in bioinformatics. Single cell RNA-seq clustering is critical for determining cell type heterogenesity at single cell level and aims to assign cells that have similar transcriptomes into the same group. Since single cell RNA sequencing data are very complex and high dimensional classical unsupervised clustering techniques may not present satisfactory biological clustering performance. In this study, we propose to use deep spectral clustering method on three publicly available scRNA datasets and compare the clustering performance of the obtained model with different classical clustering algorithms. By using Normalized Mutual Information (NMI) evaluation metric, results show that deep spectral clustering method provides accurate and improved clustering performance. © 2022 IEEE.

关键词： Bioinformatics

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Manta Ray Foraging Optimization Approaches on Multivariable PID Controller Tuning

Manta Ray Foraging Optimization Approaches on Multivariable ...

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Congress on Evolutionary Computation

作者： Yan Lieven Souza Luúio Luiza Scapinello Aquino Da Silva Viviana Cocco Mariani Leandro Dos Santos Coelho Electrical Engineering Graduate Program (PPGEE) Federal University of Parana (UFPR) Curitiba Brazil Department of Electrical Engineering Mechanical Engineering Graduate Program (PPGEM) Pontifical Catholic University of Parana (PUCPR) and Federal University of Parana (UFPR) Curitiba Parana Brazil Department of Electrical Engineering Industrial and Systems Engineering Graduate Program (PPGEPS) Pontifical Catholic University of Parana (PUCPR) and Federal University of Parana (UFPR) Curitiba Brazil

This work presents a performance comparison between the newly developed Manta Ray Foraging Optimization (MRFO) and two different variants created for tuning a decentralized fractional order proportional-integral-derivative (FOPID) controller for a multiple-input multiple-output (MIMO) application. The application consists of a ball mill pulverizing system to pulverize coal and maximize fuel efficiency. MRFO and its applications have the task of finding the optimal controller variable values to control the system's temperature and pressure. The MRFO is a metaheuristic based on the behavior of manta rays, and although it shows efficient performance it may be improved through the use of techniques which generate new variants of the algorithm. Two techniques were used in the de-velopment of new variants: Quantum mechanics and opposition-based learning. The three different versions of MRFO were used to minimize a custom fitness function which is a combination of the integral time squared error (ITSE) and the overshoot of the system response. Simulations were carried using Simulink and Matlab softwares. For analyzing the performances, statistical measures such as minimum, maximum, best, mean, median, and standard deviation of the fitness function over 50 runs were used. Additionally, the different variants were also compared for minimizing 10 benchmark functions. The results show that the use of the previously mentioned techniques improve the performance of the original MRFO in optimizing the FOPID to control the ball mill pulverizing system.

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Synthetic Batik Pattern Generator Using Wasserstein Generative Adversarial Network with Gradient Penalty 6

Synthetic Batik Pattern Generator Using Wasserstein Generati...

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6th International Seminar on Research of Information Technology and Intelligent Systems, ISRITI 2023

作者： Andriadi, Kus Heryadi, Yaya Lukas Suparta, Wayan Sonata, Ilvico Binus Graduate Program Doctor of Computer Science Bina Nusantara University Computer Science Department Jakarta Indonesia Jakarta12930 Indonesia Institut Teknologi Nasional Faculty of Industrial Technology Department of Electrical Engineering Yogyakarta Yogyakarta55281 Indonesia

ISBN: (纸本)9798350358346

Batik is an Indonesian world cultural heritage. Batik consists of many kinds of patterns depending on where the batik comes from, Batik-making techniques continue to develop along with technology development. Among the batik making techniques that are widely used are hand-written, stamping, and printing. Batik motifs have been widely used as research material, especially in the field of artificial intelligence. The diverse appearance of batik motifs has attracted many researchers to carry out research on making synthetic batik patterns, one of which uses a Generative Adversarial Network. This paper presents a synthetic batik pattern model based on the Wasserstein Generative Adversarial Network with Gradient Penalty. This model has been proven to create new synthetic batik patterns quite well and almost identical with images provided in the dataset, with the notes if the dataset provided is large. © 2023 IEEE.

关键词： Generative adversarial networks

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A Resolution Proof System for Dependency Stochastic Boolean Satisfiability

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Journal of Automated Reasoning 2023年第3期67卷 26-26页

作者： Luo, Yun-Rong Cheng, Che Jiang, Jie-Hong R. Graduate Institute of Electronics Engineering National Taiwan University Taipei10617 Taiwan Department of Electrical Engineering National Taiwan University Taipei10617 Taiwan

Dependency stochastic Boolean satisfiability (DSSAT), which generalizes stochastic Boolean satisfiability (SSAT) and dependency quantified Boolean formula (DQBF), is a new logical formalism that allows compact encoding of NEXPTIME decision problems under uncertainty. Despite potentially broad applications, a decision procedure for DSSAT remains lacking. In this work, we present the first sound and complete resolution calculus for DSSAT. The resolution system deduces the maximum satisfying probability of a DSSAT formula and provides a witnessing certificate. We also show that when the special case of SSAT formulas is considered, the DSSAT resolution calculus p-simulates a known SSAT resolution scheme. Our result may pave a theoretical foundation for further development and certification of DSSAT solvers. © 2023, The Author(s), under exclusive licence to Springer Nature B.V.

关键词： Stochastic systems

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Improving electrically Evoked Compound Action Potential Based on electrical Field Imaging and Electrode Interfaces

Improving Electrically Evoked Compound Action Potential Base...

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IEEE Conference on Electromagnetic Field Computation

作者： Charles T.M. Choi Chun Ting Ke Jelani Lawrence Alexander C. C. Wang Department of Electronics and Electrical Engineering College of Electrical & Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Institute of Electrical and Control Engineering College of Electrical & Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Institute of Biomedical Engineering College of Electrical & Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Electrical Engineering & Computer Science International Graduate Program College of Electrical & Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan

ISBN: (数字)9798350348958

ISBN: (纸本)9798350348965

The electrically evoked compound action potential (ECAP) has been used in various clinical studies and has become a key physiological signal for cochlear implants (CI). This study used four sensing electrodes to record ECAP signals based on the alternating polarity approach. An electrical field imaging (EFI) result based on the finite element method was used to obtain the interface impedance, then ECAP simulation results were computed and compared with a patient's clinical ECAP measurements. Preliminary modeling results show that the interface impedance obtained by this EFI-based technique can improve the simulation accuracy of the ECAP model. The ECAP modeling result will be compared with clinical ECAP measurements to validate the model in the full paper.

关键词： Electrodes Action potentials Impedance measurement Computational modeling Simulation Imaging Finite element analysis

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Monolithically integrated 940 nm VCSELs on bulk Ge substrates

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Optics Express 2024年第4期32卷 6609-6618页

作者： Wan, Zeyu Yang, Yun-Cheng Chen, Wei-Hsin Chiu, Chih-Chuan Zhao, Yunlong Feifel, Markus Chrostowski, Lukas Lackner, David Wu, Chao-Hsin Xia, Guangrui Department of Materials Engineering The University of British Columbia 6350 Stores Road VancouverBCV6 T 1Z4 Canada Graduate Institute of Electronics Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Rd. Taipei106319 Taiwan Graduate Institute of Photonics and Optoelectronics National Taiwan University No. 1 Sec. 4 Roosevelt Rd. Taipei106319 Taiwan Graduate School of Advanced Technology National Taiwan University No. 1 Sec. 4 Roosevelt Rd. Taipei106319 Taiwan Heidenhofstrasse Freiburg79110 Germany Department of Electrical and Computer Engineering The University of British Columbia 5500-2332 Main Mall VancouverBCV6 T 1Z4 Canada

This research successfully developed an independent Ge-based VCSEL epitaxy and fabrication technology route, which set the stage for integrating AlGaAs-based semiconductor devices on bulk Ge substrates. This is the second successful Ge-based VCSEL technology reported worldwide and the first Ge-based VCSEL technology with key details disclosed, including Ge substrate specification, transition layer structure and composition, and fabrication process. Compared with the GaAs counterparts, after epitaxy optimization, the Ge-based VCSEL wafer has a 40% lower surface root-mean-square roughness and 72% lower average bow-warp. After device fabrication, the Ge-based VCSEL has a 10% lower threshold current density and 19% higher maximum optical differential efficiency than the GaAs-based VCSEL. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Gallium arsenide

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EVALUATION OF THE METAL OXIDE SURGE ARRESTERS DEGRADATION BASED ON THE LOSS TANGENT 22

EVALUATION OF THE METAL OXIDE SURGE ARRESTERS DEGRADATION BA...

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22nd International Symposium on High Voltage engineering, ISH 2021

作者： Barbosa, Vandilson R.N. Costa, Edson G. Leite Neto, Antônio F. Carvalho, Itaiara F. Castro, Patrício F. Souza, João P.C. Melo, João V.J. Lira, George R.S. Electrical Engineering Graduate Program Campina Grande Brazil Department of Electrical Engineering Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9781839536052

Metal Oxide Surge Arresters (MOSAs) are equipment used to protect equipment of electrical Power Systems (EPSs). In this work, a technique is proposed to assess the level of MOSAs degradation based on the loss tangent calculation. The degradation of surge arresters, as well as other electrical equipment, can also be assessed by means of the loss tangent that varies with the voltage and the level of degradation. Thus, its value tends to increase according to the time of use of the equipment. A high value of the loss tangent is indicative of a failure. For the development of the proposed technique, tests in a high voltage laboratory were carried out in order to build a database. In these tests, different operating conditions were simulated to verify the behavior of the loss tangent curve, considering the surge arrester as being in good and defective condition. Based on the values obtained in the tests, it was observed that for each operational state of the evaluated components, different curves of the loss tangent were obtained, in addition to verifying that the more degraded the surge arrester is, the greater the value of the loss tangent. Thus, the loss tangent can be used to assess the operational condition of the MOSAs. © 2021 The Institution of engineering and Technology.

关键词： Metals

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Design and Strategy Deployment of SD-WAN Technology: In Indonesia (Case Study: PT. XYZ)

Design and Strategy Deployment of SD-WAN Technology: In Indo...

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2021 International Conference on Green Energy, Computing and Sustainable Technology, GECOST 2021

作者： Pratiwi, Wiwi Gunawan, Dadang Universitas Indonesia Graduate Program of Telecommunication Management Department of Electrical Engineering Jakarta Indonesia

ISBN: (纸本)9781665438650

For large companies with branch offices spread across various regions, it is not enough to rely on traditional wide area network (WAN) technology to connect networks between data centers, head offices, and branch offices that are far apart. This is because traditional WAN operation requires many devices with their own complexities. SDN is a method that separates the Control Plane and the Forwarding Plane. In a traditional network, the two functions above are in the same device. One of the SDN technologies on the network is SD-WAN. Another problem in traditional network is WAN infrastructure primarily uses MPLS, which can be very expensive and has limited bandwidth. With the increasing volume of data, MPLS costs can be quite high the expensive cost. PT. XYZ as a banking company that has branches scattered everywhere must pay attention to this. This paper proposes the suitable design and implementation scenario of SD-WAN technology at PT. XYZ so that the existing network can be integrated. From the proposed design, it can be shown that SD-WAN technology is able to answer the weaknesses of traditional WANs in terms of ease of monitoring, cost efficiency, and flexibility © 2021 IEEE.

关键词： Wide area networks

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Investigation of Beam Steering Using a Rotatable All-Dielectric Hemispherical Lens Assembly with an Ultra-Wideband Antenna 5

Investigation of Beam Steering Using a Rotatable All-Dielect...

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5th Research, Invention, and Innovation Congress: Innovative electricals and electronics, RI2C 2024

作者： Sangpet, Patchadaporn Pirajnanchai, Virote Chalermwisutkul, Suramate Chudpooti, Sukanya Akkaraekthalin, Prayoot Chudpooti, Nonchanutt Rajamangala University of Technology Thanyaburi Faculty of Engineering Deparment of Electronics and Telecommunication Engineering Pathum Thani12110 Thailand King Mongkut's University of Technology North Bangkok The Sirindhorn International Thai-German Graduate School of Engineering Bangkok10800 Thailand King Mongkut's University of Technology North Bangkok Department of Industrial Physics and Medical Instrumentation Bangkok10800 Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Deparment of Electrical and Computer Engineering Bangkok10800 Thailand

ISBN: (纸本)9798331505998

This study presents a 3D-printed all-dielectric lens assembly integrated with an ultra-wideband (UWB) antenna, designed specifically for beam-steering applications. The proposed system achieves beam steering by combining a rotatable 3D-printed all-dielectric lens assembly with a hemispherical lens and a UWB antenna. The UWB antenna is fabricated on an FR-4 substrate, while the hemispherical lens and rotatable stage assembly are made from Acrylonitrile Butadiene Styrene (ABS). The lens assembly includes a set of 3D-printed lenses capable of rotating to specific angles, with predefined positions at ±60° and a step size of 30°. Based on the simulated results, at the lower frequency of 3.1 GHz, the UWB antenna integrated with the 3D-printed all-dielectric hemispherical lens assembly does not achieve effective beam steering, as the main beam direction deviates from the rotatable lens angle. However, at intermediate frequencies, such as 7.0 GHz, the system demonstrates successful beam steering by adjusting the rotation angle of the hemispherical lens on the rotatable stage. © 2024 IEEE.

关键词： Lens antennas

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Balancing Dual DC Voltage Control in Quasi Single-Stage Converter for Low-Voltage Energy Storage System Grid-Connected

Balancing Dual DC Voltage Control in Quasi Single-Stage Conv...

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International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Warissara Manokum Yuttana Kumsuwan Department of Electrical Engineering Graduate Program in Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand Provincial Electricity Authority Bangkok Thailand Department of Electrical Engineering Faculty of Engineering Chiang Mai University Chiang Mai Thailand

The aim of a bidirectional quasi single-stage converter (QSSC) for low-voltage energy storage systems that are grid-connected is to reduce the power conversion stage of the dc-dc converter, which results in improved overall efficiency. The QSSC configuration relies on a modified modulation strategy due to the unequal dual dc port (upper and lower dc ports) voltage. The control for ensuring that the dual dc port voltages are equal is presented in this paper. When the lower dc port is varied in response to battery voltage, another is controlled to track in response to the lower dc port, so that the voltage ratio between the upper and lower dc port is always equal to one. Furthermore, power sharing in a dual dc port is equal, which means that a dc-dc converter automatically operates at 50% of the battery power. Thus, the existing modulation can be used and the power stage conversion of the dc-dc converter can be decreased. The proposed control for the QSSC is verified with simulation results.

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