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IEEE International Conference on Communications (ICC)

作者： Adrian Vidal V. B. Wijekoon Emanuele Viterbo Dept. Electrical & Computer Systems Engineering Monash University Clayton VIC Australia

Nanopore sequencing enables reading strings of A,C,G,T nucleotides in DNA strands by pulling them into nanopores with the help of motor proteins. Due to the discrete stepping of motor proteins, the signals produced by a DNA sequence tend to be piecewise-constant expansions of some underlying real-valued sequence. In this paper, we assume that every k-nucleotide sequence corresponds to a real-valued codeword of length $k$ , and model the nanopore channel as a noisy duplication channel that stretches every sample of a codeword using a geometric distribution, and then adds Gaussian noise. We show that for this channel, a simpler variant of the dynamic time warping (DTW) algorithm performs maximum likelihood decoding. Next, we devise an $O(k^{2})$ - algorithm for bounding the pairwise error probability between two codewords of length $k$ . Finally, we use Scrappie to design codebooks with a storage efficiency of 1 bit per nucleotide and demonstrate using error simulations the accuracy of the calculated error bounds.

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High-Speed Operational Amplifier Based On Complementary “Folded” Cascodes

High-Speed Operational Amplifier Based On Complementary “Fo...

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Informatics, Electronics, and Radio engineering (PIERE), International Conference Problems of

作者： Dmitry V. Kuznetsov Dmitriy V. Kleimenkin Nikolay N. Prokopenko Alexey E. Titov dept. of Scientific Research dept. of Information Systems and Radio Engineering Don State Technical University Rostov-na-Donu Russia dept. of Information Systems and Radio Engineering Don State Technical University Rostov-na-Donu Russia dept. of Automatic Control Systems Southern Federal University Rostov-na-Donu Russia

ISBN: (数字)9798331516321

ISBN: (纸本)9798331516338

A significant disadvantage of classical operational amplifiers with a complementary “folded” cascode is that in the dynamic overload mode of the input differential stage, the maximum output current of the “folded” cascode is tightly coupled to the currents of the current-stabilizing bipoles that establish its static mode. This prevents (under the static current consumption limitations of the operational amplifier) a fast recharge of the integrating correction capacitor, which limits the maximum slew rate of the output voltage. The paper discusses new circuit solutions of CBJT operational amplifier based on complementary “folded” cascodes and input differential stage of dual-input stage subclass to increase slew rate from 215 V/µs to 8000 V/µs level. The problem solved here is to provide higher levels of “folded” cascode output current during the transient edge. This effect is achieved by introducing three additional small capacitance correction capacitors into the circuit. It is possible to introduce a special current limiting resistor in series with the third additional capacitor to reduce overshoot during the transient edge. The proposed modifications of operational amplifier have significant advantages in comparison with the classical ones based on complementary “folded” cascodes in terms of slew rate level. Results of computer modeling of the operational amplifier in LTSpice environment for silicon CBJT technological process with micron topological norms are presented.

关键词： Operational amplifiers Resistors Micrometers Limiting Capacitors Voltage Silicon Transient analysis Standards Switching circuits

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Research of Electromagnetic and Electromechanical Processes in High-Voltage Soft Start Devices with Gate Turn-Off Thyristors 5

Research of Electromagnetic and Electromechanical Processes ...

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5th IEEE International Conference on Modern Electrical and Energy System, MEES 2023

作者： Busher, Victor Chornyi, Oleksii Tytiuk, Valerii Glazeva, Oksana Shestaka, Anatoliy Melnikova, Lubov National University 'Odessa Maritime Academy' Dept. of Electrical Engineering and Electronics Odessa Ukraine Kremenchuk Mykhailo Ostrohradskyi National University Institute of Electromechanics Energy Saving and Automatic Control Systems Kremenchuk Ukraine Kryvyi Rih National University Kryvyi Rih Ukraine Odessa State Polytechnic University Dept. Electromechanical Engineering Odessa Ukraine

ISBN: (纸本)9798350359787

The purpose of the work is to investigate the possibilities of soft-start devices with gate turn-off thyristors in electric drives of bow thrusters with adjustable propeller pitch to increase reliability, reduce mechanical shocks and currents, and improve electromagnetic compatibility with the ship's electrical power plant. The characteristic features of these drives are operation on fan load and the need for a smooth start in a sufficiently short time to reduce impact torque in the mechanism. As a result of the analysis, a solution with a shunt capacitor is proposed, which provides high accuracy of regulation of the 1st harmonic of the voltage on the motor according to the given law. The minimum value of the capacitor capacity was found, which for the ABB/AMD710L8T motor with a capacity of 2.7 MW is 150-250 μF at switching frequencies from 500 to 1000 Hz. For the first time, the dependences of the GTO switching frequency on the capacitor capacity and the coefficient of harmonic distortion of the current in the stator phase of the selected motor were found. Frequencies are obtained that correspond to the actual physical characteristics of the GTO (500-1000 Hz). At such switching frequencies, the characteristics of the soft start device practically do not differ from the ideal regulator of the phase voltage of an asynchronous motor. This makes it possible to synthesize closed systems with stabilization of the main coordinates of soft starter electric drive, two-circuit systems with the formation of a given tachogram with torque limitation. All this makes it feasible to implement soft start devices based on gate turn-off thyristors. © 2023 IEEE.

关键词： Electric drives

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A Framework Leveraging Robotics and Machine Learning Technologies for Early Disease and Pest Detection in Greenhouse Tomato Crops

A Framework Leveraging Robotics and Machine Learning Technol...

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International Conference on control, Artificial Intelligence, Robotics & Optimization (ICCAIRO)

作者： Nikolaos Kounalakis Emmanouil Kalykakis Dimitrios Kosmopoulos John Fasoulas Michael Sfakiotakis Control Systems and Robotics Laboratory (CSRL) School of Engineering Hellenic Mediterranean University Heraklion Greece Dept. of Computer Engineering and Informatics University of Patras Patras Greece

We present an integrated framework for intelligent automated plant monitoring, towards early disease and pest detection in greenhouse tomato crops. The framework combines the use of a robotic mobile platform to autonomously collect multi-spectral images of the plants, with a tool that utilizes Faster R-CNN to detect regions that signify the presence of a disease or pest. The robot is based on a modified mobile vertical mast lift platform, and integrates a 6-dof robotic arm that is used to position the plant imaging multi-spectral camera. The robot can navigate autonomously inside the greenhouse via a magnetic guidance sensor. Results from a series of experiments demonstrate the validity and effectiveness of the implemented framework.

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Hydrological and Structural Monitoring for Flood Risk Mitigation in Cosenza Urban Area (Southern Italy)

Hydrological and Structural Monitoring for Flood Risk Mitiga...

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International Conference on Information and Communication Technologies for Disaster Management (ICT-DM)

作者： Daniela Biondi Francesco S. Liguori Antonio Bilotta Antonio Madeo Giovanna Capparelli Dept. of Computer Engineering Modelling Electronics and Systems University of Calabria Rende Italy

The evaluation of flood risk in urban areas characterized by high vulnerability indices is a fundamental task in order to undertake any mitigation action. When flood-induced phenomena affect structures (buildings, bridges, river banks, etc.) particularly in areas adjacent to rivers, as for the city of Cosenza, the real time detection of any change in the structural response is crucial for a proper safety level assessment. In the present work, a framework for remote monitoring of hydrological events and related structural behaviour is proposed. Data pertaining to the hydro-meteorological event are collected mainly through a series of ultrasonic hydrometers, different types of rain gauges and webcams, to allow a rough estimate of the expected action on the structures. The structural response is monitored through accelerometers (or other instruments) which allows identifying the evolution of the dynamic behaviour, in order to detect insurgent damage phenomena. The acquired structural measurements are employed to tune both fine structural models or rough simplified models. Moreover, the structural monitoring system allows to estimate damages due to other natural events, such as earthquakes, which well suits current philosophies of multi-risk assessment. This study is carried out within the “Smart integrated monitoring system for safe and resilient communities” action of the NRRP Tech4you project.

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Union Bound for Generalized Duplication Channels with DTW Decoding

Union Bound for Generalized Duplication Channels with DTW De...

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IEEE International Symposium on Information Theory

作者： Adrian Vidal V. B. Wijekoon Emanuele Viterbo Dept. Electrical & Computer Systems Engineering Monash University Clayton VIC Australia

In this paper, we calculate a union bound for dynamic time warping (DTW)-based decoding of piecewise constant signals corrupted by additive noise and time stretching due to sample duplications, as observed in raw measurement signals obtained from nanopore sequencers. We consider both finitely- and infinitely-supported duplications with geometric-like characteristic, which include discrete uniform distributions as a special case. First, we provide explicit algorithms that calculate the union bound in O(αk 2 ) time for the infinite-support case and in O(β 2 k 2 ) for the finite-support case, where k is the codeword length, α is the minimum duplication, and β is the maximum duplication. Next, we show that a multi-read union bound exhibits a thresholding effect, where the error probability can be made arbitrarily close to zero by aggregating DTW distances from sufficiently many independent reads. Finally, we validate the calculated bounds relative to simulation results.

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CPR: Correlation-based Page Remapping

CPR: Correlation-based Page Remapping

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International SoC Design Conference, ISOCC

作者： Hojung Namkoong Jungrae Kim Dept. of Electrical and Computer Engineering Sungkyunkwan University Suwon Korea Dept. of Semiconductor Systems Engineering Sungkyunkwan University Suwon Korea

As the number of multimedia IPs in mobile devices increases, a high memory bandwidth becomes essential. To meet this demand, Application Processors (APs) employ multiple memory channels. However, employing fine-grained channel interleaving leads to frequent bank conflicts in DRAM, resulting in increased energy consumption and reduced battery life. This paper proposes a novel Virtual to Physical address mapping (VA-to-PA) scheme, called Correlation-based Page Remapping (CPR). This technique involves remapping pages based on the access correlations between them to enhance bank parallelism. By increasing the channel interleaving size to 1KB and applying CPR, we can reduce the DRAM energy consumption of activation (ACT) and precharge (PRE) operations by 15% without any decrease in DRAM performance.

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Projection-based controllers with Inherent Dissipativity Properties

arXiv

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arXiv 2023年

作者： Chu, Hoang van den Eijnden, S.J.A.M. Heemels, W.P.M.H. The Control Systems Technology Section Dept. Mechanical Engineering Eindhoven University of Technology Netherlands

Projection-based controllers (PBCs) are currently gaining traction in both scientific and engineering communities. In PBCs, the input-output signals of the controller are kept in sector-bounded sets by means of projection. In this paper, we will show how this projection operation can be used to induce useful passivity or general dissipativity properties on broad classes of (unprojected) nonlinear controllers that otherwise would not have these properties. The induced dissipativity properties of PBC will be exploited to guarantee asymptotic stability of negative feedback interconnections of passive nonlinear plants and suitably designed PBC, under mild conditions. Proper generalizations to so-called (q,s,r)-dissipativity will be presented as well. For illustrating the effectiveness of PBC control design via these passivity-based techniques, two numerical examples are provided. Copyright © 2023, The Authors. All rights reserved.

关键词： controllers

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A Systematic Literature Review of the Application of Agile Applied to Large-Scale, Safety-Critical, Cyber-Physical systems

A Systematic Literature Review of the Application of Agile A...

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International Conference on Data and Software engineering (ICODSE)

作者： Robin J. Yeman Yashwant K. Malaiya Dept. Systems Engineering Colorado State University Fort Collins USA Dept. Computer Science Colorado State University Fort Collins USA

ISBN: (数字)9798331506407

ISBN: (纸本)9798331506414

The application of Agile methodologies to large-scale, safety-critical cyber-physical systems (LS/SC/CPS) has shown significant interest over the last 5 years. Although there has been limited research into each of the individual attributes for de-velopment projects that are large-scale, safety-critical, or cyber-physical systems, there is a scarcity of research when all three attributes exist simultaneously in a development endeavor. This systematic literature review explores the extent of Agile adoption in projects where all three attributes are present. It begins by examining the extent of Agile adoption by domain, identifying the drivers for change, reviewing the challenges encountered, and investigating the augmentations used to address these challenges. The findings indicate that there has been growth in adoption across the medical, aerospace, automotive, and robotics indus-tries, with limited adoption in energy and transportation. Key drivers include speed, adaptability, and cost. Several challenges have been identified, with regulatory/compliance requirements being the most significant. Multiple augmentations to Agile have been applied to overcome the identified challenges, ranging from incorporating safety frameworks and specialized artifacts to leveraging modeling and simulation, as well as reimagining pro-grammatics. This review highlights industry efforts to apply Agile to LS/SC/CPS, while identifying several gaps in the literature. The largest gap is empirical validation in real-world settings. Future research should focus on improving the existing Agile scaling frameworks with guidance and resources to help achieve the benefits of Agile in LS/SC/CPS development while ensuring regulatory and safety compliance.

关键词： Industries Technological innovation Costs Transportation Cyber-physical systems Complexity theory Standards Aerospace industry Systematic literature review Software engineering

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Investigating the Significance of Surface Roughness for Screen-printed Silver ink on Kapton Substrate

Investigating the Significance of Surface Roughness for Scre...

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IISE Annual Conference and Expo 2022

作者： Abdelatty, Mohamed Y. Umar, Ashraf Khinda, Gurvinder S. Poliks, Mark D. Dept. of Systems Science and Industrial Engineering State University of New York at Binghamton BinghamtonNY United States Dept. of Electrical and Computer Engineering State University of New York at Binghamton BinghamtonNY United States

ISBN: (纸本)9781713858072

Minor changes between the designed Flexible hybrid electronic (FHE) devices and the actual realized printed devices are very crucial for the development and maturity of this technology. The quality of printed electronics depends on mechanical and chemical factors such as ink properties and the printing technique [1], [2]. Fluctuations in the quality of printed electronic devices, such as thickness, width, waviness, and surface roughness, affect their radio frequency (RF) performance [2]. In this paper, we investigate statistically, using design of experiments (DoE) techniques, the significance of surface roughness of screen-printed silver ink traces on the RF performance. Ninety-six microstrip lines were printed;we measured the average thickness, average width, average roughness, and average waviness, for all the samples. Also, we measured the S-parameters for all the samples;then, we extracted Insertion-loss at four different frequencies. We performed simple statistical analysis and checked independence and normality assumptions for our data. We considered the thickness, width, roughness, and waviness to be our independent variables. We performed regression analysis and best subsets regression four times each time we consider the insertion-loss as the dependent variable. We were able to conclude that surface roughness becomes more significant as the frequency increases for screen-printed FHEs. © 2022 IISE Annual Conference and Expo 2022. All rights reserved.

关键词： Surface roughness

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