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Challenges of gated myocardial perfusion SPECT processing 门控心肌灌注SPECT处理的挑战
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-171-177
V. Ploskikh, E. Kotina
{"title":"Challenges of gated myocardial perfusion SPECT processing","authors":"V. Ploskikh, E. Kotina","doi":"10.35470/2226-4116-2021-10-3-171-177","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-171-177","url":null,"abstract":"The paper provides an in-depth look at gated myocardial perfusion single photon emission computed tomography (SPECT) data processing. Attention paid to several unmentioned subjects of the quantitative analysis of gated myocardial perfusion SPECT data. The article considers several options in the construction process of the ellipsoid coordinate system of the left ventricle (LV). Mathematical representation of polar maps is given. Formulas of the regional parameters calculation are proposed. Issues of phase analysis are explored.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48983432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A multi-stage algorithm for image denoising based on PCA and adaptive TV-regularization 一种基于PCA和自适应TV正则化的多阶段图像去噪算法
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-162-170
Tran Dang Khoa Phan
{"title":"A multi-stage algorithm for image denoising based on PCA and adaptive TV-regularization","authors":"Tran Dang Khoa Phan","doi":"10.35470/2226-4116-2021-10-3-162-170","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-162-170","url":null,"abstract":"In this paper, we present an image denoising algorithm comprising three stages. In the first stage, Principal Component Analysis (PCA) is used to suppress the noise. PCA is applied to image blocks to characterize localized features and rare image patches. In the second stage, we use the Gaussian curvature to develop an adaptive total-variation-based (TV) denoising model to effectively remove visual artifacts and noise residual generated by the first stage. Finally, the denoised image is sharpened in order to enhance the contrast of the denoising result. Experimental results on natural images and computed tomography (CT) images demonstrated that the proposed algorithm yields denoising results better than competing algorithms in terms of both qualitative and quantitative aspects.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49209187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Randomized approach to determine dynamic strength of ice 确定冰动强度的随机方法
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-122-126
N. Granichin, G. Volkov, Y. Petrov, M. Volkova
{"title":"Randomized approach to determine dynamic strength of ice","authors":"N. Granichin, G. Volkov, Y. Petrov, M. Volkova","doi":"10.35470/2226-4116-2021-10-3-122-126","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-122-126","url":null,"abstract":"The randomized method of Sign-Perturbed Sums (SPS) is applied within the framework of the incubation time approach to evaluate the dynamic strength of ice. The experimental data of [Carney et al., 2006; Wu and Prakash, 2015; Saletti et al., 2019] is analysed in order to estimate strength parameters of ice and describe the observed strain-rate sensitivity curves. The independence of incubation time value on the ice temperature is established in contrast with the significant dependency of the critical stress parameter. The obtained confidence interval of the spalled ice is in good correspondence with the scatter observed experimentally.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41373185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cluster control of complex cyber-physical systems 复杂网络物理系统的集群控制
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-191-200
Denis Uzhva, O. Granichin
{"title":"Cluster control of complex cyber-physical systems","authors":"Denis Uzhva, O. Granichin","doi":"10.35470/2226-4116-2021-10-3-191-200","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-191-200","url":null,"abstract":"To our minds, the real world appears as a composition of different interacting entitites, which demonstrate complex behavior. In the current paper, we primarly aim to study such networked systems by developing corresponding approaches to modeling them, given a class of tasks. We derive it from the primary concept of information and a system, with corresponding dynamics emerging from interactions between system components. As we progress through the study, we discover three possible levels of certain synchronous pattern composition in complex systems: microscopic (the level of elementary components), mesoscopic (the level of clusters), and macroscopic (the level of the whole system). Above all, we focus on the clusterization phenomenon, which allows to reduce system complexity by regarding only a small number of stable manifolds, corresponding to cluster synchronization of system component states—as opposed to regarding the system as a whole or each elementary component separately. Eventually, we demonstrate\u0000how an optimization problem for cluster control synthesis can be formulated for a simple discrete linear system with clusterization.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41831818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Modeling the control processes of the size population of microorganisms using modulated microwave 利用调制微波模拟微生物数量的控制过程
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-155-161
A. Oshchepkov
{"title":"Modeling the control processes of the size population of microorganisms using modulated microwave","authors":"A. Oshchepkov","doi":"10.35470/2226-4116-2021-10-3-155-161","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-155-161","url":null,"abstract":"The paper describes a mathematical model of a control system for the size population of microorganisms using modulated microwave radiation of non-thermal power.The model is implemented in the dynamic environment MATLAB+Simulink, the areas of optimal values of the impact parameters are found. An algorithm for automatic tuning of the modulation frequency during the experiment has been developed.The efficiency of the algorithmis shown with the help of computer simulation.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46083923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of global variables for identical and non-identical Josephson junctions arrays 相同和非相同Josephson连接阵列的全局变量控制
Cybernetics and Physics Pub Date : 2021-11-30 DOI: 10.35470/2226-4116-2021-10-3-138-142
N. Litvinov
{"title":"Control of global variables for identical and non-identical Josephson junctions arrays","authors":"N. Litvinov","doi":"10.35470/2226-4116-2021-10-3-138-142","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-138-142","url":null,"abstract":"In the paper a way to solve an LQ-problem for a Josephson junction array with a common LRC-load is proposed. The cases of identical and non-identical Josephson junctions are considered. The solution ensures phase stabilization of Josephson current in every junction. The results are obtained using computer simulation in Jupyter Notebook and MATLAB.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41798991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic control of intermittent renewableenergy fluctuations in two-layer power grids 双层电网间歇性可再生能源波动的动态控制
Cybernetics and Physics Pub Date : 2021-11-29 DOI: 10.35470/2226-4116-2021-10-3-143-154
S. Olmi, Carl H. Totz, E. Scholl
{"title":"Dynamic control of intermittent renewableenergy fluctuations in two-layer power grids","authors":"S. Olmi, Carl H. Totz, E. Scholl","doi":"10.35470/2226-4116-2021-10-3-143-154","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-3-143-154","url":null,"abstract":"In this work we model the dynamics of power grids in terms of a two-layer network, and use the Italian high voltage power grid as a proof-of-principle example. The first layer in our model represents the power grid consisting of generators and consumers, while the second layer represents a dynamic communication network that serves as a controller of the first layer. The dynamics of the power grid is modelled by the Kuramoto model with inertia, while the communication layer provides a control signal Pc i for each generator to improve frequency synchronization within the power grid. We propose different realizations of the communication layer topology and of the control signal, and test the control performances in presence of generators with stochastic power output. When using a control topology that allows all generators to exchange information, we find that a control scheme aimed to minimize the frequency difference between adjacent nodes operates very efficiently even against the worst scenarios with the strongest perturbations. On the other hand, for a control topology where the generators possess the same communication links as in the power grid layer, a control scheme aimed at restoring the synchronization frequency in the neighborhood of the controlled node turns out to be more efficient.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45006604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preface. Special issue dedicated to the memory of prof. Iliya Blekhman 前言纪念伊利亚·布莱赫曼教授特刊
Cybernetics and Physics Pub Date : 2021-10-01 DOI: 10.35470/2226-4116-2021-10-2-56-57
Alexander L. Fradkov, D. Indeitsev
{"title":"Preface. Special issue dedicated to the memory of prof. Iliya Blekhman","authors":"Alexander L. Fradkov, D. Indeitsev","doi":"10.35470/2226-4116-2021-10-2-56-57","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-2-56-57","url":null,"abstract":"","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47920319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linaccalc: software for accelerating structure characteristics simulation based on equivalent circuit method Linaccalc:基于等效电路法的加速结构特性仿真软件
Cybernetics and Physics Pub Date : 2021-06-30 DOI: 10.35470/2226-4116-2021-10-1-22-26
S. Matsievskiy, V. I. Kaminskii, A. A. Gorchakov, M. Lalayan, M. Gusarova, N. Sobenin
{"title":"Linaccalc: software for accelerating structure characteristics simulation based on equivalent circuit method","authors":"S. Matsievskiy, V. I. Kaminskii, A. A. Gorchakov, M. Lalayan, M. Gusarova, N. Sobenin","doi":"10.35470/2226-4116-2021-10-1-22-26","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-1-22-26","url":null,"abstract":"Nowadays design of accelerating structures is almost exclusively done using 2.5D and 3D codes based on finite elements method. Equivalent circuit method is frequently considered limited and inconvenient to use in real-life projects. However, low resource requirements make this method attractive for wide range sweep calculations.This paper describes LinacCalc application — a user friendly accelerating structure simulation software based on the equivalent circuit method. It allows calculating characteristics of the accelerating sections with large number of cells in short time on machines with moderate amount of computational power. Core application modules are validated by comparing calculation results with ones obtained by a conventional finite element method based programs.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42381802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A hybrid regularizers model for multiplicative noise removal 一种用于乘性噪声去除的混合正则化子模型
Cybernetics and Physics Pub Date : 2021-06-30 DOI: 10.35470/2226-4116-2021-10-1-40-50
T. T. T. Tran, C. Pham, D. Vo, Duc-Hoang Vo
{"title":"A hybrid regularizers model for multiplicative noise removal","authors":"T. T. T. Tran, C. Pham, D. Vo, Duc-Hoang Vo","doi":"10.35470/2226-4116-2021-10-1-40-50","DOIUrl":"https://doi.org/10.35470/2226-4116-2021-10-1-40-50","url":null,"abstract":"In this paper, we propose a variational method for restoring images corrupted by multiplicative noise. Computationally, we employ the alternating minimization method to solve our minimization problem. We also study the existence and uniqueness of the proposed problem. Finally, experimental results are provided to demonstrate the superiority of our proposed hybrid model and algorithm for image denoising in comparison with state-of-the-art methods.","PeriodicalId":37674,"journal":{"name":"Cybernetics and Physics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43301066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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