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15th International Scientific-Technical Conference on Actual Problems of Electronic Instrument engineering, APEIE 2021

作者： Voevoda, Aleksandr A. Shipagin, Victor I. Novosibirsk State Technical Univercity Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9781665434089

The task of controlling some systems is complicated due to the fact that real technical plants may contain delay links. That is, there is a certain time period when there is no reaction from the regulated plant to the control action. Usually, the delay link presence negatively affects the quality of such system management. There are various ways to synthesize a control system for such systems. These include: Smith predictors, specialized control tuning algorithms, the use of self-Adjusting systems with active adaptation. However, they impose additional requirements on the system dynamics or are complex in technical implementation and configuration. Within the framework of this article, an attempt is made to calculate the controller by the polynomial method for a plant with a delay. The delay mathematical model is obtained by approximating the delay link by Pade series. To ensure the necessary dynamics of the transition process, we will require the system to preserve the poles of the delay link. Then the controller, calculated for a system with a delay link in the form of a Pade series, is applied to a system with an 'ideal' delay. For clarity of the calculations carried out, an plant in the form of a aperiodic combination and integrating links connected in different ways is taken as an example. The integrating link is necessary to give the system astatic properties. As a delay, we will use the approximation of a number of Pads of different orders. The lag link gives the system an unstable character. © 2021 IEEE.

关键词： Controllers

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Designing Web Application Client Program Modules for Asynchronous Event Handling 3

Designing Web Application Client Program Modules for Asynchr...

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3rd IEEE International Conference on Problems of Informatics, Electronics and Radio engineering, PIERE 2024

作者： Mokrushin, Vadim O. Ilinykh, Sergey P. Novosibirsk State Technical University Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9798331516321

The article considers possible approaches to designing program modules in web application clients. A design approach is proposed, the use of which provides an increase in the ease of debugging programs in the development process, localization of errors and reduction of program code duplication. The proposed design approach is based on the division of responsibility between parts of the program code for the implementation of synchronous and asynchronous operations in asynchronous events. Responsibility for processing network interaction with the server and receiving data from the user through controls in the user interface should be assigned to asynchronous operations and their responsibility should be limited only to receiving data from external sources. In turn, updating the application state based on data from external sources should be limited to the responsibility of synchronous operations. The paper shows how the proposed design approach provides the above improvements and provides examples of program code. © 2024 IEEE.

关键词： Software testing

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Research and Development of the Convolutional Neural Network for Pneumonia Recognition in Radiographs 22

Research and Development of the Convolutional Neural Network...

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22nd IEEE International Conference of Young Professionals in Electron Devices and Materials, EDM 2021

作者： Antonov, Konstantin O. Alsova, Olga K. Novosibirsk State Technical University Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9781665414982

In this paper, we present the results and analysis of using the convolutional neural network (CNN) for pneumonia recognition in radiographs. The network architecture was developed, and the author's software implementation of the CNN model using TensorFlow/Keras framework is proposed. The classes in the dataset are imbalanced, and we used a combination of approaches to prevent overfitting problem such as increasing the cost of classification mistakes on the minority class, increasing the amount of data (data augmentation), exclusion of a certain percentage of neurons during training (dropout) and others. The model gave us the next results: accuracy is 0.91, precision is 0.9, recall is 0.97, roc-auc is 0.96. The obtained results allow making a conclusion about the effectiveness of using the developed CNN model for pneumonia recognizing. © 2021 IEEE.

关键词： Classification (of information)

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Platform Stabilization on a Ship under Wave Disturbances

Platform Stabilization on a Ship under Wave Disturbances

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2022 IEEE International Multi-Conference on engineering, computer and Information Sciences, SIBIRCON 2022

作者： Bui, Tam V. Yurkevich, Valery D. Novosibirsk State Technical University Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9781665464802

There is a large variety of devices and apparatus of a water vessel for the effective operation of which it is required to provide stabilization of position in space under conditions of wave disturbances, for example, navigation equipment, radar antennas of communication systems. Suppression of the influence of wave disturbances on the operation of this equipment can be provided by placing this equipment on special stabilized platforms. Stabilization of such a platform is provided by means of drives with control system. In this paper, as an example, we consider a stabilized platform with a drive in the form of a DC motor. The control task is to eliminate the influence of wave perturbations on the angle of deviation of the platform relative to the horizon. The paper considers a mathematical model of a stabilized platform on the deck of a watercraft and proposes a new methodology for synthesizing the control system to provide effective suppression of the influence of wave disturbances on the angular position of the platform. The novelty of the proposed approach to the synthesis of the control system consists in the application of the time-scale separation method to calculate the resonant proportional-integral-differential controller. © 2022 IEEE.

关键词： Controllers

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Application of Prony's Method for Predicting the Earth Rotation Parameters 25

Application of Prony's Method for Predicting the Earth Rotat...

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25th IEEE International Conference of Young Professionals in Electron Devices and Materials, EDM 2024

作者： Gavrilov, Alexey B. Ipatiev, Vitaly A. Kuzminykh, Ilya A. Faculty of Automation and Computer Engineering Novosibirsk State Technical University Novosibirsk Russia

ISBN: (纸本)9798350389234

The research paper explores the feasibility of employing the Prony parametric approximation technique for predicting time series data, with a particular emphasis on Earth rotation parameters. These parameters encompass the angular displacement of the Earth's pole axis, which are pivotal for comprehending and forecasting the Earth's rotation. The study utilizes a dataset that includes these specific parameters to evaluate the Prony method's effectiveness in forecasting. The outcomes of this method's application, which vary based on the algorithm's parameters, are thoroughly examined. This examination not only illuminates the method's predictive capabilities but also investigates how different parameter settings impact forecast accuracy. The findings underscore the Prony method's potential as a valuable instrument in the realm of time series forecasting, especially in the context of Earth rotation studies. This investigation contributes to a deeper understanding of time series analysis techniques and their applications in geophysics and related fields. The paper further discusses the implications of these findings for both theoretical and practical applications in Earth sciences. The research also highlights the importance of further studies to optimize the Prony method's parameters for maximum forecast accuracy. This could pave the way for more precise predictions in geophysical phenomena, benefiting a wide range of scientific and technological endeavors. © 2024 IEEE.

关键词： Poles and zeros

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Technique of Estimating the Amount of Batteries in Uninterruptible Power Supply Systems 18

Technique of Estimating the Amount of Batteries in Uninterru...

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18th International Scientific and Technical Conference on Dynamics of Systems, Mechanisms and Machines, Dynamics 2024

作者： Ershov, Ivan A. Gladyshev, Sergey A. Bykov, Sergey V. Faculty of Automation and Computer Engineering Novosibirsk State Technical University Novosibirsk Russia

ISBN: (纸本)9798331509019

Uninterruptible power supply devices are widely used in protection facilities. It is necessary to ensure stable operation without power supply during design or redevelopment of the system. At the same time, there is no generally accepted algorithm for calculating battery parameters that are optimal in terms of the ratio of cost and discharge time. This problem is usually solved by using additional batteries, which increases the cost of the system. We suggest using the results of battery tests to optimize their amount in an uninterruptible power supply device. A test bench has been developed that allows you to adjust the load current. Three 12V rechargeable batteries with a Capacity of 12, 17 and 26 Ah were tested. The results showed that when the load current is increased by 20% and 30%, the battery life with Capacity 12 Ah is reduced by 50%. Batteries with a Capacity of 17 Ah and 26 Ah are reduced by 20% and 10%, respectively. It is concluded that when using batteries with a Capacity of 17 and 26 Ah, it is possible to increase the load current. The results obtained make it possible to more accurately calculate the required battery capacity for an uninterruptible power supply device and optimize their amount. © 2024 IEEE.

关键词： autonomy prediction charge/discharge behavior energy efficiency lead-acid battery uninterruptible power supply

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Feasibility of Spine Segmentation in ML-Based Recognition of Vertebrae in X-Ray Images 16

Feasibility of Spine Segmentation in ML-Based Recognition of...

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16th IEEE International Scientific and Technical Conference Actual Problems of Electronic Instrument engineering, APEIE 2023

作者： Bakaev, Maxim A. Kobzev, Denis A. Piletskii, Dmitry K. Yakimenko, Alexander A. Gladkov, Alexander V. Faculty of Automation and Computer Engineering Novosibirsk State Technical University Novosibirsk Russia

ISBN: (纸本)9798350330885

Medicine remains one of the data-scarce domains, with typical datasets size not exceeding hundreds of thousands items. Correspondingly, straightforward application of end-to-end Deep Learning (ML) methods for Medical Imaging is often problematic. Carefully constructed pipelines that involve filter-based enhancement of raw images allow better outcome and leave more room for feasible data augmentation. In our paper, we explore and develop computer Vision approaches for vertebrae recognition on a limited dataset of X-ray images of human spine. In particular, we test several pre-processing filters, of which Adaptive Histogram Equalization demonstrates the highest accuracy of 85.8% in a naïve model using the popular U-Net architecture. Further, we put forward the mechanism for the automated spine area cropping based on brightness cut-off. This additional step in the pipeline allowed improving the accuracy to 89.9%, which is comparable with the accuracy obtained for MRI images of higher quality. We plan to further increase the prediction quality of the model via spine segmentation into about 20 individual vertebrae and 8-fold data augmentation. The ultimate goal is improving the identification of the vertebrae corners, which currently has the relative error of 4.36%. Our intermediate results reported in the current paper might be of interest to ML engineers who pick the steps for X-ray spine images processing pipelines. © 2023 IEEE.

关键词： Pipelines

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Solving One Problem of Optimal Production and Material Flow Management of a Garment Manufacturer 15

Solving One Problem of Optimal Production and Material Flow ...

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15th International Scientific-Technical Conference on Actual Problems of Electronic Instrument engineering, APEIE 2021

作者： Baranova, Nina V. Mezentsev, Yurii A. Pavlov, Pavel S. Novosibirsk State Technical University Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9781665434089

The optimization problem of forming a production program for the needs of a small sewing enterprise is solved. The results of the search and comparative analysis of the studies carried out in the last decade, which consider similar approaches to the application of discrete optimization tools to the problem of finding a production program, are presented. The substantiation of the relevance and novelty of the research is given, which consists in the fact that a new formulation of the discrete optimization problem has been created, which would take into account all the main aspects of production activities: from the selection of suppliers to the determination of sales plans for all types of buyers and the determination of sales prices. The input data for the program have been collected and agreed, tests that have shown the effectiveness of the proposed solution have been calculated on the real data of the enterprise. Further vectors for the development of the work have been determined. © 2021 IEEE.

关键词： Sales

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Phase-Shift Algorithm for Two Nonorthogonal Interferograms 3

Phase-Shift Algorithm for Two Nonorthogonal Interferograms

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3rd IEEE International Conference on Problems of Informatics, Electronics and Radio engineering, PIERE 2024

作者： Guzhov, Vladimir I. Ilinykh, Sergey P. Khaidukov, Dmitry S. Novosibirsk State Technical University Faculty of Automation and Computer Engineering Novosibirsk Russia

ISBN: (纸本)9798331516321

The phase step method is widely used to analyze interferograms and extract the phase distribution from them. Its limitation is the large number of interferograms required for this purpose. The minimum number is three interferograms. This paper describes a general analysis algorithm that requires only two interferograms, the phase shifts between which may not be orthogonal. The idea of the paper is to obtain an additional interferogram by transforming a two-dimensional elliptical cross section that is formed by the two interferograms into a threedimensional cross section with respect to the base of some spatial cylinder. After determining the parameters of the ellipse, a projection vector parallel to the center axis of the cylinder is found. Then the two-dimensional section is projected onto a three-dimensional plane perpendicular to the center axis of the cylinder. Each of the projections of this plane onto the coordinate planes forms one of the interferograms. After obtaining three interferograms, phase demodulation was performed using a three-point algorithm. The RMS error of the phase calculation was 0.015 radians. © 2024 IEEE.

关键词： Demodulation

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Image cryptography algorithm based on a new composite chaotic system and Latin square collaborative mechanism

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Optics and Lasers in engineering 2025年 193卷

作者： Anhong Tian Zhongze Yue Chengbiao Fu Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming 650500 China Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 China Yunnan Key Laboratory of Computer Technologies Application Kunming University of Science and Technology Kunming 650500 China

Encryption algorithms based on chaos theory have become a prominent research focus in the field of information security. However, existing chaotic systems exhibit several limitations, including discontinuous chaotic intervals, low complexity of chaotic signals, and insufficient robustness in their dynamical behavior. These deficiencies pose potential risks to the application of chaotic cryptography. To address these issues, this paper proposes a universal two-dimensional composite hyperchaotic system model (2D-CHS). Through rigorous theoretical analysis, it is demonstrated that the number of positive Lyapunov exponents ( LEs ) in 2D-CHS is always equal to its dimensionality, indicating the existence of infinitely many coexisting attractors and strong robustness against dynamical degradation. To validate the effectiveness of the proposed 2D-CHS, three one-dimensional chaotic maps are first employed as seed maps to construct three 2D chaotic mappings as representative examples. Evaluation and experimental results demonstrate that the newly generated chaotic maps exhibit broader and more continuous chaotic intervals than traditional chaotic maps, and they also outperform existing systems in terms of LEs , the 0–1 t est, sample entropy ( SE ), permutation entropy ( PE ), and correlation dimension ( CD ). Furthermore, a digital circuit implementation scheme based on a microcontroller is designed to verify the practical feasibility and physical realizability of the proposed system. Finally, the novel 2D chaotic system is integrated with Latin square matrices to develop a high-efficiency image encryption algorithm. Experimental results confirm that the algorithm demonstrates excellent efficiency and security performance.

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