İnce, Türker
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Ince, T
Turker Ince
Ince, Turker
İnce, Turker
İnce, T
Turker Ince
Ince, Turker
İnce, Turker
İnce, T
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turker.ince@ieu.edu.tr
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05.06. Electrical and Electronics Engineering
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Current Staff
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Sustainable Development Goals
Documents
95
Citations
9377
h-index
31
Documents
62
Citations
7243
Scholarly Output
92
Articles
42
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16/923
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4
Supervised PhD Theses
1
WoS Citation Count
6799
Scopus Citation Count
8950
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26
Scopus h-index
29
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0
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5
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73.90
Scopus Citations per Publication
97.28
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33
Supervised Theses
5
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Article Citation - WoS: 64Citation - Scopus: 76Self-Organized Operational Neural Networks With Generative Neurons(Pergamon-Elsevier Science Ltd, 2021) Kiranyaz, Serkan; Malik, Junaid; Abdallah, Habib Ben; İnce, Türker; Iosifidis, Alexandros; Gabbouj, MoncefOperational Neural Networks (ONNs) have recently been proposed to address the well-known limitations and drawbacks of conventional Convolutional Neural Networks (CNNs) such as network homogeneity with the sole linear neuron model. ONNs are heterogeneous networks with a generalized neuron model. However the operator search method in ONNs is not only computationally demanding, but the network heterogeneity is also limited since the same set of operators will then be used for all neurons in each layer. Moreover, the performance of ONNs directly depends on the operator set library used, which introduces a certain risk of performance degradation especially when the optimal operator set required for a particular task is missing from the library. In order to address these issues and achieve an ultimate heterogeneity level to boost the network diversity along with computational efficiency, in this study we propose Self-organized ONNs (Self-ONNs) with generative neurons that can adapt (optimize) the nodal operator of each connection during the training process. Moreover, this ability voids the need of having a fixed operator set library and the prior operator search within the library in order to find the best possible set of operators. We further formulate the training method to back-propagate the error through the operational layers of Self-ONNs. Experimental results over four challenging problems demonstrate the superior learning capability and computational efficiency of Self-ONNs over conventional ONNs and CNNs. (C) 2021 The Author(s). Published by Elsevier Ltd.Article Citation - WoS: 5Citation - Scopus: 5The Effect of Automated Taxa Identification Errors on Biological Indices(Pergamon-Elsevier Science Ltd, 2017) Arje, Johanna; Karkkainen, Salme; Meissner, Kristian; Iosifidis, Alexandros; İnce, Türker; Gabbouj, Moncef; Kiranyaz, SerkanIn benthic macroinvertebrate biomonitoring systems, the target is to determine the status of ecosystems based on several biological indices. To increase cost-efficiency, computer-based taxa identification for image data has recently been developed. Taxa identification errors can, however, have strong effects on the indices and thus on the determination of the ecological status. In order to shift the biomonitoring process towards automated expert systems, we need a clear understanding on the bias caused by automation. In this paper, we examine eleven classification methods in the case of macroinvertebrate image data and show how their classification errors propagate into different biological indices. We evaluate 14 richness, diversity, dominance and similarity indices commonly used in biomonitoring. Besides the error rate of the classification method, we discuss the potential effect of different types of identification errors. Finally, we provide recommendations on indices that are least affected by the automatic identification errors and could be used in automated biomonitoring. (C) 2016 Elsevier Ltd. All rights reserved.Patent Method and Apparatus for Performing Motor-Fault Detection Via Convolutional Neural Networks(2020) Kiranyaz, Serkan; İnce, Türker; Eren, LeventConference Object Citation - Scopus: 1Improved Detection of Broken Rotor Bars by 1-D Self-Onns(IEEE, 2022) Eren, Levent; Devecioglu, Ozer Can; Ince, Turker; Askar, MuratRecently, machine learning techniques have been increasingly applied to the detection of both mechanical and electrical faults in induction motors. Broken rotor bars are one of the most common fault types that seriously affect the efficiency and lifetime of induction motors. In this study, compact 1-D self-organized operational neural networks (Self-ONNs) are applied to improve the detection and classification of broken rotor bars in induction motors. 1-D convolutional neural networks (CNNs) are a special case of Self-ONNs and they are usually preferred to traditional fault diagnosis systems with separately designed feature extraction and classification blocks as they provide cost-effective and practical hardware implementation. The proposed system improves the detection and classification performance of 1-D CNNs while still providing similar advantages and preserving real-time computational ability.Conference Object Citation - WoS: 2Citation - Scopus: 8Multi-Dimensional Evolutionary Feature Synthesis for Content-Based Image Retrieval(2011) Kiranyaz S.; Pulkkinen J.; İnce, Türker; Gabbouj, MoncefLow-level features (also called descriptors) play a central role in content-based image retrieval (CBIR) systems. Features are various types of information extracted from the content and represent some of its characteristics or signatures. However, especially the (low-level) features, which can be extracted automatically usually lack the discrimination power needed for accurate description of the image content and may lead to a poor retrieval performance. In order to efficiently address this problem, in this paper we propose a multidimensional evolutionary feature synthesis technique, which seeks for the optimal linear and non-linear operators so as to synthesize highly discriminative set of features in an optimal dimension. The optimality therein is sought by the multi-dimensional particle swarm optimization method along with the fractional global-best formation technique. Clustering and CBIR experiments where the proposed feature synthesizer is evolved using only the minority of the image database, demonstrate a significant performance improvement and exhibit a major discrimination between the features of different classes. © 2011 IEEE.Conference Object Citation - WoS: 2Citation - Scopus: 4A Comparison of Feature Selection Algorithms for Cancer Classification Through Gene Expression Data: Leukemia Case(IEEE, 2017) Taşçı, Aslı; İnce, Türker; Guzelis, CuneytIn this study, three different feature selection algorithms are compared using Support Vector Machines as classifier for cancer classification through gene expression data. The ability of feature selection algorithms to select an optimal gene subset for a cancer type is evaluated by the classification ability of selected genes. A publicly available micro array dataset is employed for gene expression values. Selected gene subsets were able to classify subtypes of the considered cancer type with high accuracies and showed that these feature selection methods were applicable for bio-marker gene selection.Article Citation - WoS: 53Citation - Scopus: 65Enhanced Bearing Fault Detection Using Multichannel, Multilevel 1d Cnn Classifier(Springer, 2022) Ozcan, Ibrahim Halil; Devecioglu, Ozer Can; İnce, Türker; Eren, Levent; Askar, MuratElectric motors are widely used in many industrial applications on account of stability, solidity and ease of use. Mechanical bearing faults have the highest statistical occurrence percentage among all of the motor fault types. Accurate and advance detection of the bearing faults is critical to avoid unpredicted breakdowns of electric motors. Through early detection of bearing faults, it would be possible to solve the problem at a lower cost by repairing and/or replacing relevant parts. Most of the fault detection works in the literature attempted to detect binary {healthy, faulty} motor fault case based on a single input. In this study, we propose an enhanced performance bearing fault diagnosis system based on multichannel, multilevel 1D-CNN classifier processing vibration data collected from multiple accelerometers mounted on bearings in a test bed. Effectiveness and feasibility of the proposed method are validated by applying it to the benchmark IMS bearing vibration dataset for inner race and rolling element faults and comparing the results with the conventional single-axis data-based fault detection.Article Citation - WoS: 29Citation - Scopus: 37Blind Ecg Restoration by Operational Cycle-Gans(IEEE-Inst Electrical Electronics Engineers Inc, 2022) Kiranyaz, Serkan; Devecioglu, Ozer Can; İnce, Türker; Malik, Junaid; Chowdhury, Muhammad; Hamid, Tahir; Mazhar, RashidObjective: ECG recordings often suffer from a set of artifacts with varying types, severities, and durations, and this makes an accurate diagnosis by machines or medical doctors difficult and unreliable. Numerous studies have proposed ECG denoising; however, they naturally fail to restore the actual ECG signal corrupted with such artifacts due to their simple and naive noise model. In this pilot study, we propose a novel approach for blind ECG restoration using cycle-consistent generative adversarial networks (Cycle-GANs) where the quality of the signal can be improved to a clinical level ECG regardless of the type and severity of the artifacts corrupting the signal. Methods: To further boost the restoration performance, we propose 1D operational Cycle-GANs with the generative neuron model. Results: The proposed approach has been evaluated extensively using one of the largest benchmark ECG datasets from the China Physiological Signal Challenge (CPSC-2020) with more than one million beats. Besides the quantitative and qualitative evaluations, a group of cardiologists performed medical evaluations to validate the quality and usability of the restored ECG, especially for an accurate arrhythmia diagnosis. Significance: As a pioneer study in ECG restoration, the corrupted ECG signals can be restored to clinical level quality. Conclusion: By means of the proposed ECG restoration, the ECG diagnosis accuracy and performance can significantly improve.Article Citation - WoS: 24Citation - Scopus: 33Early Bearing Fault Diagnosis of Rotating Machinery by 1d Self-Organized Operational Neural Networks(IEEE-Inst Electrical Electronics Engineers Inc, 2021) İnce, Türker; Malik, Junaid; Devecioglu, Ozer Can; Kiranyaz, Serkan; Avcı, Onur; Eren, Levent; Gabbouj, MoncefPreventive maintenance of modern electric rotating machinery (RM) is critical for ensuring reliable operation, preventing unpredicted breakdowns and avoiding costly repairs. Recently many studies investigated machine learning monitoring methods especially based on Deep Learning networks focusing mostly on detecting bearing faults; however, none of them addressed bearing fault severity classification for early fault diagnosis with high enough accuracy. 1D Convolutional Neural Networks (CNNs) have indeed achieved good performance for detecting RM bearing faults from raw vibration and current signals but did not classify fault severity. Furthermore, recent studies have demonstrated the limitation in terms of learning capability of conventional CNNs attributed to the basic underlying linear neuron model. Recently, Operational Neural Networks (ONNs) were proposed to enhance the learning capability of CNN by introducing non-linear neuron models and further heterogeneity in the network configuration. In this study, we propose 1D Self-organized ONNs (Self-ONNs) with generative neurons for bearing fault severity classification and providing continuous condition monitoring. Experimental results over the benchmark NSF/IMS bearing vibration dataset using both x- and y-axis vibration signals for inner race and rolling element faults demonstrate that the proposed 1D Self-ONNs achieve significant performance gap against the state-of-the-art (1D CNNs) with similar computational complexity.Article Citation - WoS: 72Citation - Scopus: 89Operational neural networks(Springer London Ltd, 2020) Kiranyaz, Serkan; İnce, Türker; Iosifidis, Alexandros; Gabbouj, MoncefFeed-forward, fully connected artificial neural networks or the so-called multi-layer perceptrons are well-known universal approximators. However, their learning performance varies significantly depending on the function or the solution space that they attempt to approximate. This is mainly because of their homogenous configuration based solely on the linear neuron model. Therefore, while they learn very well those problems with a monotonous, relatively simple and linearly separable solution space, they may entirely fail to do so when the solution space is highly nonlinear and complex. Sharing the same linear neuron model with two additional constraints (local connections and weight sharing), this is also true for the conventional convolutional neural networks (CNNs) and it is, therefore, not surprising that in many challenging problems only the deep CNNs with a massive complexity and depth can achieve the required diversity and the learning performance. In order to address this drawback and also to accomplish a more generalized model over the convolutional neurons, this study proposes a novel network model, called operational neural networks (ONNs), which can be heterogeneous and encapsulate neurons with any set of operators to boost diversity and to learn highly complex and multi-modal functions or spaces with minimal network complexity and training data. Finally, the training method to back-propagate the error through the operational layers of ONNs is formulated. Experimental results over highly challenging problems demonstrate the superior learning capabilities of ONNs even with few neurons and hidden layers.