The surface defects of a hot-rolled strip will adversely affect the appearance and quality of industrial products. Therefore, the timely identification of hot-rolled strip surface defects is of great significance. In order to improve the efficiency and accuracy of surface defect detection, a lightweight network based on coordinate attention and self-interaction (CASI-Net), which integrates channel domain, spatial information, and a self-interaction module, is proposed to automatically identify six kinds of hot-rolled steel strip surface defects. In this paper, we use coordinate attention to embed location information into channel attention, which enables the CASI-Net to locate the region of defects more accurately, thus contributing to better recognition and classification. In addition, features are converted into aggregation features from the horizontal and vertical direction attention. Furthermore, a self-interaction module is proposed to interactively fuse the extracted feature information to improve the classification accuracy. The experimental results show that CASI-Net can achieve accurate defect classification with reduced parameters and computation.

Medical image segmentation is a challenging and popular task in the field of medical image processing in recent decades. Most of the current mainstream segmentation networks are based on convolutional neural networks (CNNs) methods. Among them, encoding and decoding structures based on U-Net architecture and skip connection mechanism have made great progress in medical segmentation. However, these networks come with increased complexity and training difficulty as the accuracy of network segmentation continues to increase, and their ability remains to be improved for extracting feature information in specific information-intensive structure segmentation tasks, such as brain tumors. In addition, the high training cost raises the application threshold of medical image segmentation. To address these issues, we introduce a frequency representation approach that can effectively reduce the loss of feature during encoding and decoding of segmentation networks. Then a tokenized multi-layer perceptron (MLP) method is introduced to learn the space information. Frequency representation and tokenized MLP can greatly reduce the parameters and computational effort while achieving more accurate and efficient medical image segmentation. Therefore, a multi-level lightweight U-Net segmentation network named MLU-Net is proposed to perform segmentation tasks of medical images quickly. In brain tumor segmentation experiments under equivalent preprocessing conditions, our network achieves substantial efficiency gains with parameter and computational workload reductions to 1/39 and 1/61 of U-Net’s, while simultaneously demonstrating superior performance, enhancing the Dice and Intersection over Union (IoU) metrics by 3.37% and 3.30%, respectively. In addition, we perform experiments on dermatologic data and still achieve segmentation performance that outperforms comparable networks. These experiments show that the proposed network is characterized by lightweight and high accuracy, which is contributing to the exploration of clinical medicine scenarios.

This paper studies the effect of parameter mismatch on lag synchronization of chaotic systems with time delay in the framework of master-slave configuration. It shall be shown that lag synchronization of coupled systems may achieve weakly in the presence of small parameter mismatches. The error bound of lag-synchronization arising from the parameter mismatches is also estimated by rigorously theoretical analysis. Numerical simulations on a Lu oscillator are presented to verify the theoretical results.

In the field of neuroscience, the electroencephalogram (EEG) is a crucial indicator of emotion. The EEG emotion recognition method based on domain adaptation (DA) has good objectivity and high time resolution and is the preferred method to study the brain’s response to emotional stimuli. However, due to the obvious instability of EEG emotion characteristics, it is difficult to predict the emotion corresponding to EEG signals of cross-subjects by a model that combines all source domains into a single source. In order to solve the problem of cross-subject emotion analysis, we propose an EEG emotion recognition net with a cross-subject multi-source adaptive method (MASTF-net), where EEG features of different subjects are regarded as different domains. Through analyzing the invariance of the target domain and the uniqueness of the source domain, this method realizes the emotional analysis of different objects according to the spatio-temporal images and frequency domain information. First, features of EEG image are extracted from frequency and time dimensions. Secondly, combined with the serialized EEG frequency characteristics of local brain regions, independent classification module are established for different domains to recognize the emotion feature distribution of different subjects. In addition, a feature extraction method of differential entropy(DE) data of EEG is proposed based on frequency band division, which can provide stable feature input for our network structure. Finally, experiments are conducted on the SEED dataset. The experimental results show that our method has better classification accuracy in the experiment on the problem of cross multiple subjects. MASTF-net is superior to other relevant methods and models in multi-source domain. On the issue of cross subject emotion analysis, the highest accuracy of our method can reach $88.19\%$ .

Deep convolutional neural networks have made some progress in skin lesion classification and cancer diagnosis, but there are still some problems to be solved, such as the challenge of small inter-class feature differences and large intra-class feature differences, which might limit the classification performance of the model as high-level and low-level features are not properly utilized. This paper proposes a multi-scale skin cancer image identification network using self-interactive attention pyramid and cross-layer bilinear-trilinear pooling(SPCB-Net), which mainly consists of three proposed sub-modules that are the self-interacting attention pyramid (SAP), the across-layer bilinear-trilinear pooling operation and the global average algorithm(GAA). The SPCB-Net is applied to two representative datasets of medical images in dermatology and histopathology (HAM10000 and NCT-CRC-HE-100K) to demonstrate the effectiveness of in the skin lesion classification. SPCB-Net(ResNet101) achieves 97.10% and 99.87% accuracy on HAM10000 and NCT-CRC-HE-100K respectively, which are both achieved performance improvements of 0.4% compared to the state-of-the-art models. In addition, a large number of experiments on HAM10000 show that the interactive attention pyramid(SPA) proposed in this paper is superior to the common attention module, and the method with a cross-layer bilinear-trilinear pooling is superior to the cross-layer trilinear pooling method. SPCB-Net is configured on Vgg19 and ResNet101 to evaluate the effectiveness of our proposed module. The experimental results show that SPCB-Net has shown state-of-the-art performance in the two field of dermatology and histopathology. Therefore, it is not only well qualified for the task of identifying skin cancer image but also has the potential to identify skin cancer by identifying pathological tissue.