{"title":"Arithmetic Mean May Offer Fixed Points When Expected Mean Fails in Probabilistic Asynchronous Affine Inference","authors":"Georgios Apostolakis, A. Bletsas","doi":"10.1109/SSP53291.2023.10208025","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208025","url":null,"abstract":"Distributed computing over multiple terminals is recently regaining increased popularity. This work studies the probabilistic asynchronous affine model, which can be applied in a vast range of message passing (inference) algorithms; moreover, the probability of a terminal failing to exchange messages can be also modeled. This work complements recent prior art by analyzing the state vector’s arithmetic mean instead of the expected mean, since there are cases where valid fixed points can be retrieved from the arithmetic mean (exploiting a finite number of experiments), even if the expected mean diverges. This work highlights this fact and offers a sufficient criterion for arithmetic mean convergence to a fixed point, for the first time in the literature; the criterion also covers cases where the individual experiments do not converge but their arithmetic mean does. Simulation results verify the theoretical findings.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123245738","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}
Bouthaina Slika, F. Dornaika, K. Hammoudi, Vinh Truong Hoang
{"title":"Automatic Quantification of Lung Infection Severity in Chest X-ray Images","authors":"Bouthaina Slika, F. Dornaika, K. Hammoudi, Vinh Truong Hoang","doi":"10.1109/SSP53291.2023.10207986","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10207986","url":null,"abstract":"A large number of well-maintained datasets are needed for the diagnosis and assessment of the severity of the new disease (COVID-19) using chest radiographs (CXR). To achieve the best results, current methods for quantifying severity require complex methods and large datasets for training. Medical professionals must have access to systems that can quickly and automatically identify COVID-19 patients and predict severity. In this work, we measure the severity of COVID-19 using an efficient neural network consisting of a CNN backbone and a regression head to automatically predict lung infection scores. In addition, we investigate the efficiency of some augmentation methods to increase the potential of the deep model. A comparative study was conducted using several state-of-the-art deep learning methods on the public RALO dataset. The experimental results show that our model has the potential to perform best on severity quantification tasks and demonstrate the impact of lung segmentation on performance.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123800769","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}
Michele Alessandrini, G. Biagetti, P. Crippa, L. Falaschetti, S. Luzzi, C. Turchetti
{"title":"EEG-Based Neurodegenerative Disease Classification using LSTM Neural Networks","authors":"Michele Alessandrini, G. Biagetti, P. Crippa, L. Falaschetti, S. Luzzi, C. Turchetti","doi":"10.1109/SSP53291.2023.10208023","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208023","url":null,"abstract":"In recent years, the use of electroencephalography (EEG) for the clinical diagnosis of neurodegenerative diseases, such as Alzheimer’s disease, frontotemporal dementia and dementia with Lewy bodies, has been extensively studied. The classification of these different neurodegenerative diseases can benefit from machine learning techniques which, compared to manual diagnosis methods, have higher reliability and higher recognition performance, being able to handle large amounts of data. The purpose of this work is to develop an automatic classification method that can recognize a number of different neurodegenerative diseases such the aforementioned ones, having similar corresponding EEGs or being difficult to discern by inspection from a human operator. We show how a recurrent neural network (RNN) based on long short-term memory (LSTM) elements can successfully perform the task of classification, when the data are properly pre-processed.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123426368","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}
Rabah Ouchikh, A. Aïssa-El-Bey, T. Chonavel, M. Djeddou
{"title":"OTFS-IM channel estimation and data detection algorithm with a superimposed pilot pattern","authors":"Rabah Ouchikh, A. Aïssa-El-Bey, T. Chonavel, M. Djeddou","doi":"10.1109/SSP53291.2023.10207981","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10207981","url":null,"abstract":"Orthogonal time frequency space modulation (OTFS) has been proved to have better performance over orthogonal frequency division multiplexing (OFDM) under high-mobility environments. In this manuscript, we address the challenging problem of channel estimation in high-mobility scenarios for 5G and beyond. To improve the spectral efficiency of the system, we combine superimposed pilots with index modulation paradigm. Indeed, we propose an iterative algorithm for channel estimation and symbol detection with superimposed pilot pattern for OTFS-IM systems. The proposed algorithm iterates between LMMSE-based data detection and data-aided channel estimation. Performance in terms of spectral efficiency and bit error rate are evaluated and compared against state-of-the-art methods.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124627970","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}
{"title":"A Speech Distortion Weighted Single-Channel Wiener Filter Based STFT-Domain Noise Reduction","authors":"Jie Zhang, Rui Tao, Lirong Dai","doi":"10.1109/SSP53291.2023.10208040","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208040","url":null,"abstract":"In this work, we focus on the single-channel noise reduction (NR) in the short-time Fourier transform (STFT) domain from the traditional signal processing perspective. As conventional single-channel NR methods suffer from a serious speech distortion (SD), we propose an SD weighted single-channel Wiener filter (SDW-SWF), where an auxiliary parameter µ is exploited to trade-off the SD and residual noise variance. In the subspace, the obtained SDW-SWF can be formulated as a function of µ and a set of generalized eigenvectors of correlation matrices. In addition, we theoretically analyze the impacts of the trade-off factor and the rank on the SD, residual noise power and the output signal-to-noise ratio (SNR). Finally, numerical results validate the effectiveness of the proposed method, exhibiting a consistency with the theoretical findings. It can be concluded that the SDW-SWF approach enables more degrees-of-freedom to improve the speech intelligibility at a sacrifice of SNR.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125120577","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}
{"title":"Improving of the interpretation of linear filtering preprocessing-based multiscale permutation entropy","authors":"M. Jabloun, P. Ravier, O. Buttelli","doi":"10.1109/SSP53291.2023.10208030","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208030","url":null,"abstract":"Multi-scale permutation entropy (MPE) is an interesting tool for analyzing signal internal structures and quantifying complexity. The most commonly used MPEs involve a linear preprocessing step applied to the original signal prior to the evaluation of the permutation entropy (PE). However, recent research done by Davalos et al has demonstrated that linear filtering preprocessing significantly modifies the PE of Gaussian processes.To build on this work, we conducted a study to investigate the MPE’s behavior across a variety of signal generation models including sinusoidal signals, frequency modulated signals, and colored Gaussian noise. Our findings indicate that the MPE mainly reflects changes in the center frequency of the signal spectrum, independent of signal generation models. It’s important to note that the linear preprocessing step used in MPE calculations can lead to misinterpretation of the results. Therefore, we suggest that a proper interpretation of the MPE values should be done in conjunction with a spectral analysis or a time-frequency representation.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127117364","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}
S. Ahmadi-Asl, A. Phan, A. Cichocki, Ashish Jha, Anastasia Sozykina, Jun Wang, I. Oseledets
{"title":"Fast Adaptive Cross Tubal Tensor Approximation","authors":"S. Ahmadi-Asl, A. Phan, A. Cichocki, Ashish Jha, Anastasia Sozykina, Jun Wang, I. Oseledets","doi":"10.1109/SSP53291.2023.10208018","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208018","url":null,"abstract":"This paper deals with proposing a new efficient adaptive algorithm for the computation of tensor SVD (t-SVD). The proposed algorithm can estimate the tubal-rank of a given third-order tensor and the corresponding low tubal-rank approximation given an approximation tolerance. The main advantage of the proposed algorithm is using only a part of lateral and a horizontal slices at each iteration in its computations. So, it is applicable for decomposing large-scale data tensors. Simulations on synthetics and real-world datasets are provided and in some cases, we achieve more than one order of magnitude acceleration compared with the classical truncated t-SVD. It is shown that the proposed approach can potentially be used in deep learning and internet of things applications.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127284240","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}
{"title":"Tensor Chain Decomposition and Function Interpolation","authors":"P. Tichavský, A. Phan","doi":"10.1109/SSP53291.2023.10207942","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10207942","url":null,"abstract":"Tensor Chain (TC) decomposition represents a given tensor as a chain (circle) of order-3 tensors (wagons) connected through tensor contractions. In this paper, we show the link between the TC decomposition and a structured Tucker decompositions, and propose a variant of the Krylov-Levenberg-Marquardt optimization, tailored for this problem. Many extensions can be considered, here we only mention decomposition of tensor with missing entries, which enables the tensor completion. Performance of the proposed algorithm is demonstrated on tensor decomposition of the sampled Rosenbrock function. It can be better modeled both as TC and canonical polyadic (CP) decomposition, but with TC, the reconstruction is possible with a lower number of function values.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125422604","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}
{"title":"Efficient Sparse Reduced-Rank Regression With Covariance Estimation","authors":"Fengpei Li, Ziping Zhao","doi":"10.1109/SSP53291.2023.10208069","DOIUrl":"https://doi.org/10.1109/SSP53291.2023.10208069","url":null,"abstract":"Multivariate linear regression is a fundamental model widely used in many fields of signal processing and machine learning. To enhance its interpretability and predicting performance, many approaches have been developed. Among them, the sparse reduced-rank regression with covariance estimation (SRRRCE) method has been shown to be promising. SRRRCE is powerful, which jointly considers the dimension reduction and variable selection of the regression coefficient, as well as a covariance selection target. In this paper, we will propose a new optimization formulation for SRRRCE by modifying the variable coupling constraint in the existing formulation. For efficient problem solving, a convergent single-loop algorithm based on the block majorization-minimization algorithmic framework is developed. Numerical experiments demonstrate the proposed estimation method possesses better prediction performance and faster convergence speed compared to the existing one.","PeriodicalId":296346,"journal":{"name":"2023 IEEE Statistical Signal Processing Workshop (SSP)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126572692","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}