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Impact of Parameters for the In-situ Measurement of the Electric Field Strength of the SSB Signal in a 5G NR System Using the Frequency-Selective Method in Zero-Span Mode

Impact of Parameters for the In-situ Measurement of the Elec...

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International Conference on Smart Systems and Technologies (SST)

作者： Vanja Mandrić Slavko Rupčić Bogdan Pavković Josip Ilakovac Department of Communication Faculty of Electrical Engineering Computer Science and Information Technology Osijek Osijek Croatia Department of Computing and Control Engineering Faculty of Technical Sciences University of Novi Sad Novi Sad Serbia Faculty of Electrical Engineering Computer Science and Information Technology Osijek Osijek Croatia

ISBN: (数字)9798350386394

ISBN: (纸本)9798350386400

Measuring 5G systems is a major challenge for measurement engineers, who need to be aware of all the limitations of the new generation The parameters of the frequency-selective measurement system (spectrum analyzer - ROHDE & SCHWARZ FSH8) were investigated in the measurement of 5G NR SSB signals (3.4 – 3.8 GHz). The focus was on the setting parameters which, according to the literature, have an influence on the measurement: RBW, VBW, SWEEP TIME and the duration of the measurement. All measurements were carried out in zero-span mode. In the second part of the measurement, these SSB synchronization signal measurement results were compared with the 5G signal measurement results at the same location using the NARDA SRM-3006 device equipped with a decoder for the 5G NR system (FR1) to determine the optimal method for measuring these signals with a spectrum analyzer (SA).The measurement results show that the resolution bandwidth (RBW) has the largest variation in the measured electric field (EF) strength values of the SSB 5G NR signal of 17.20 dB (MH/RMS) and 17.70 (RMS/AGV10). It is therefore necessary to pay particular attention to the setting of this measurement parameter. In addition, the video resolution (VBW) shows a significantly lower field strength variation of 2.50 dB, but also the same deviation from the reference value of 2.50 dB (RMS/AGV10). Other analyzed parameters have a negligible influence on the measurement of the EF *** post-processing was performed in the work to determine the final (maximum) value of the EF strength at the points of assumed highest exposure, which is used to assess the impact and compliance with the permissible values according to the relevant standards.

关键词： Time-frequency analysis 5G mobile communication Measurement uncertainty Electric variables measurement Amplitude modulation Time measurement Frequency measurement Decoding Electric fields Signal resolution

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Dual-Electrodynamic Wheel Force Analysis

Dual-Electrodynamic Wheel Force Analysis

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International Conference on Magnetics (INTERMAG)

作者： Colton Bruce Jonathan Z. Bird Matthew Grubbs Department of Electrical and Computer Engineering Laboratory for Magnetomechanical Energy Conversion and Control Portland State University Portland OR USA

The rotation of an electrodynamic wheel (EDW) above a flat conductive, non-magnetic, track induces currents in the track that can create lift and thrust/braking force. This paper presents a new type of dual-EDW that consists of two EDWs in series that can also create a controllable lateral force. The magnitude and direction of the lateral force can be changed via the relative phase angle shifting of the two rotors. The changes in the lateral force magnitude as well as direction are shown to not affect the lift and thrust force magnitude. The geometric analysis of the design is presented and the practical difficulty of implementing the design is also discussed.

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UPB at IberLEF-2023 AuTexTification: Detection of Machine-Generated Text using Transformer Ensembles

arXiv

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arXiv 2023年

作者： Preda, Andrei-Alexandru Cercel, Dumitru-Clementin Rebedea, Traian Chiru, Costin-Gabriel Computer Science and Engineering Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest060042 Romania

This paper describes the solutions submitted by the UPB team to the AuTexTification shared task, featured as part of IberLEF-2023. Our team participated in the first subtask, identifying text documents produced by large language models instead of humans. The organizers provided a bilingual dataset for this subtask, comprising English and Spanish texts covering multiple domains, such as legal texts, social media posts, and how-to articles. We experimented mostly with deep learning models based on Transformers, as well as training techniques such as multi-task learning and virtual adversarial training to obtain better results. We submitted three runs, two of which consisted of ensemble models. Our best-performing model achieved macro F1-scores of 66.63% on the English dataset and 67.10% on the Spanish dataset. © 2023, CC BY.

关键词： Deep learning

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Exploiting Emercoin Blockchain and Trusted Computing for IoT Scenarios: A Practical Approach

Exploiting Emercoin Blockchain and Trusted Computing for IoT...

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IEEE Symposium on computers and Communications (ISCC)

作者： Diana Gratiela Berbecaru Lorenzo Pintaldi Department of Control and Computer Engineering Politecnico di Torino Italy Politecnico di Torino Italy Torino Italy

Traditional Public Key Infrastructures (PKIs) seem not adequate for some Internet of Things (IoT) environments asking for fast, flexible, and secure solutions. Alternatively, IoT devices could generate asymmetric key pairs on their own, and store the relative public keys or X.509 certificates into a blockchain, e.g., Emercoin. Nevertheless, in some contexts, reliable device identification is still required. We extended an Emercoin-based decentralized PKI solution for IoT scenarios, by integrating the device's identification with a TPM (Trusted Platform Module) 2.0 to a specific trusted node in an IoT network named Device Manager (DM). Through experimental tests performed with a TPM 2.0-equipped Raspberry Pi 4 device, we evaluated the time spent registering the IoT devices into the blockchain, or establishing secure (TLS) channels. Even though the Emercoin-based TLS handshake time is higher than the standard one, the proposed solution remains a viable alternative in scenarios requiring flexibility and device identification.

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Myocardial Segmentation of 2D Echocardiography Based on the Improved Self-Attention Mechanism

Myocardial Segmentation of 2D Echocardiography Based on the ...

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Machine Vision, Image Processing and Imaging Technology (MVIPIT), International Conference on

作者： Delong Li Yixin Sun Xue Han Suyu Dong College of Computer and Control Engineering Northeast Forestry University Harbin China The Department of Ultrasound Harbin Medical University Cancer Hospital Harbin China

ISBN: (数字)9798331543037

ISBN: (纸本)9798331543044

The measurement of different clinical indicators, such as the myocardial wall's thickness and the ventricle's volume, depends on accurately segmenting the left ventricle in 2D echocardiography. This segmentation is essential for making various clinical decisions, such as whether surgery is necessary. However, segmenting the myocardium requires clinical expertise and makes accurate segmenting time-consuming due to the poor quality of echocardiograms. It is essential to develop an automatic myocardial segmentation method. Some deep learning methods, especially the U-net structure, were proposed to support the automatic myocardium segmentation in echocardiography. The model must simultaneously capture the local and global dependency relationships in the ultrasound images for myocardial segmentation in echocardiography. Given the inherent attribute of local operation of convolution operations, this poses significant limitations for U-Net based on the traditional CNN as the basic architecture. For example, when dealing with complex myocardial textures and structures, we need to accurately identify the myocardium's global morphological features and overall structural patterns. Moreover, this locality may lead to deviations and errors when segmenting the boundary regions or the myocardial parts closely related to the surrounding tissues. Our primary focus will be redefining the skip connection using the attention mechanism. More integrated attention mechanisms can further enhance the segmentation effect of myocardial in echocardiography. Therefore, we integrated the cross-attention mechanism when concatenating features in the skip connection. Through conducting rigorous ablation studies on multiple echocardiography segmentation datasets, the performance of the proposed mechanism was proven.

关键词： Deep learning Image segmentation Attention mechanisms Accuracy Ultrasonic imaging Echocardiography Volume measurement Myocardium Transformers Thickness measurement

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Actuator Fault Reconstruction for a Class of OSL Nonlinear Systems 21

Actuator Fault Reconstruction for a Class of OSL Nonlinear S...

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21st IEEE International Conference on Sciences and Techniques of Automatic control and computer engineering, STA 2022

作者： Naifar, Omar Gassara, Hamdi Elloumi, Mourad Jmal, Assaad Electrical Engineering Department BP 1173 Sfax3038 Tunisia National School of Engineering of Sfax University of Sfax Laboratory of Sciences and Technology of Automatic Control and Computer Engineering P. O. Box 1173 Sfax3038 Tunisia

ISBN: (纸本)9781665482615

A single study has addressed actuator failure reconstruction for the One-sided Lipschitz (OSL) family of nonlinear systems. The predicted fault vector in that work does not provide any insight into the underlying problematic physical characteristics of the system, which is a significant shortcoming. In this work, we offer a way for estimating the incorrect physical parameters of actuators using an adaptive observer strategy. To demonstrate the utility of the suggested method, a numerical example and simulation research are provided. © 2022 IEEE.

关键词： Actuators

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Deep-Learning-Based Onset Time Precision in Acoustic Emission Non-Destructive Testing

Deep-Learning-Based Onset Time Precision in Acoustic Emissio...

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Metrology for Living Environment (MetroLivEn), IEEE International Workshop on

作者： Jonathan Melchiorre Leo D'Amato Federico Agostini Amedeo Manuello Department of Structural Geotechnical and Building Engineering Politecnico di Torino Turin Italy Department of Control and Computer Engineering Politecnico di Torino DAUIN Turin Italy Department of Physics and Astronomy University of Padua Padua Italy

ISBN: (数字)9798350385014

ISBN: (纸本)9798350385021

To investigate the actual health status and mechanical properties of structural materials, both direct and/or indirect investigation procedures can be used. The acoustic emission (AE) method is a non-destructive indirect structural health monitoring method based on the analysis of the elastic wave propagation inside the material under study induced during cracks and micro-cracks coalescence, opening, and formation process. To capture reliable ultrasonic elastic waveform data, piezoelectric sensors are typically employed which are directly and firmly fixed and attached to the specimen under study. For identifying the region of crack formation, thus the position of structural damage in its early stage, at least four sensors must be employed simultaneously. Furthermore, the identification of the onset time is crucial to accomplishing this task. In this study, the authors proposed a deep-learning-based solution based on a U-net architecture for identifying onset time with a method attempting to overcome the existing limitations of traditional threshold-based methods. The onset time precision obtained with this artificial intelligence-based (AI) paradigm is discussed on an acknowledged dataset available in the literature based on Pencil Lead Break (PLB) data, commonly used as a benchmark in the AE field. Finally, the method is tested on some real AE signals acquired during laboratory testing of reinforced concrete specimens. The results demonstrated the actual potential of the proposed AI-based method in future real-time monitoring real- world applications.

关键词： Deep learning Training Acoustic emission Real-time systems Sensors Reliability Task analysis

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TLS-Monitor: A Monitor for TLS Attacks

TLS-Monitor: A Monitor for TLS Attacks

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Consumer Communications and Networking Conference, CCNC IEEE

作者： Diana Gratiela Berbecaru Giuseppe Petraglia Department of Control and Computer Engineering Politecnico di Torino Torino ITALY Politecnico di Torino Torino ITALY

The Transport Layer Security (TLS) protocol is subject to intensive research resulting in a long list of TLS attacks discovered in the last decade. To test the resistance of a TLS server to attacks, several tools or services can be used nowadays, such as the famous Qualys SSL Server Test. Nevertheless, although a security administrator updates the TLS software and configuration, internal attacks or malicious code could change that TLS-installed code or its setting at any time to make it prone to attacks. Thus, either the TLS server configuration is checked continuously, or other techniques are needed to indicate that a running TLS server is potentially vulnerable to attacks. We propose TLS-Monitor, a TLS attack-aware network monitoring tool that inspects the traffic for a target system looking for known TLS vulnerabilities that may lead to attacks. Examples are the self-signed certificate(s) allowing to set up a man-in-the-middle attack or the TLS heartbeat extension for the Heartbleed attack. If a vulnerability is found, the proposed tool checks if the threat applies by launching specific TLS attacks. Ultimately it raises alarms and creates a report. The TLS-Monitor tool employs network monitoring tools, like Suricata and Zeek, and TLS attack tools, like TLS-Attacker or Metasploit. We successfully tested TLS-Monitor in a testbed environment for some selected attacks, including Heartbleed, MITM, and Bleichenbacher. We foresee to extend the tool in the future to support other TLS attacks.

关键词： Resistance Protocols Codes Heart beat Malware Servers Security

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Development of a UAV-based System for Technical Diagnostics of Overhead Power Lines 24

Development of a UAV-based System for Technical Diagnostics ...

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24th International Conference on Computational Problems of Electrical engineering, CPEE 2023

作者： Kozlovskyi, Oleksandr Trushakov, Dmitro Rendzinyak, Serhiy Korud, Vasyl Central Ukrainian National Technical University Department of Electrical Systems and Energy Management Kropyvnytskyi Ukraine Central Ukrainian National Technical University Department of Automation and Control in Technical Systems Kropyvnytskyi Ukraine Ivan Franko National University of Lviv Faculty of Electronics and Computer Technologies Lviv Ukraine Lviv Polytechnic National University Institute of Power Engineering and Control System Lviv Ukraine

ISBN: (纸本)9798350330342

The problems associated with the operation of overhead power lines and ways of improving control over their condition with the help of UAVs are considered. A structural diagram of the system of technical diagnostics of overhead lines based on UAVs was developed, for which the necessary diagnostic parameters were selected according to informative criteria. An analysis of types of UAVs was carried out in order to determine their suitability and efficiency of use for diagnosing the condition of overhead lines. © 2023 IEEE.

关键词： Unmanned aerial vehicles (UAV)

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Comparison of Traffic control with Model Predictive control and Deep Reinforcement Learning

Comparison of Traffic Control with Model Predictive Control ...

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International Conference on control, Decision and Information Technologies (CoDIT)

作者： Muhammad Imran Riccardo Izzo Andrea Tortorelli Francesco Liberati Department of Computer Control and Management Engineering “A. Ruberti” University of Rome “La Sapienza” Rome RM Italy

Traffic congestion is among the worst causes of pollution, and the time spent in traffic can cost the world tens of billions of dollars every year. Solutions to mitigate this problem are at hand thanks to the advent of advanced control techniques and artificial intelligence (AI). Traditional traffic light control strategies based on fixed timing of the green, yellow and red phases are simple to implement, but at the same time very inefficient, in particular for busy intersections. This paper discusses both a model predictive control (MPC) approach and a model-free deep reinforcement learning (DRL) algorithm for controlling the traffic lights at a single intersection, with the aim of improving the traffic flow. Firstly, a detailed linear mathematical model of an intersection is formulated and successively tested in a MPC framework; secondly, a DRL algorithm is proposed and verified by comparing it with the currently implemented baseline controller. Finally, the results for the three approaches, MPC, DRL and the baseline controller, are validated through the SUMO (Simulation of Urban Mobility) microscopic traffic simulator.

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