Multi-view classification based on the Dempster-Shafer theory is widely recognized for its reliability in safety-critical domains with multi-view data. However, the adoption of a late fusion strategy constrains information interaction among views, thereby leading to suboptimal utilization of multi-view data. A recent advancement addressing this limitation involves generating a pseudo view by concatenating individual views. Yet, the efficacy of this pseudo view may diminish when incorporating underperforming views like noisy views. Additionally, the integration of a pseudo view exacerbates the issue of imbalanced multi-view learning, as it contains a disproportionate amount of information compared to individual views. To address these issues, we propose the enhancing Trusted multi-view classification via Evolutionary multi-view Fusion (TEF) approach. TEF employs an evolutionary multi-view architecture search method to create a high-quality fusion architecture serving as the pseudo view, facilitating adaptive view and fusion operator selection. Furthermore, TEF enhances each view within the fusion architecture by concatenating the fusion architecture's decision output with its respective view. Our experimental results demonstrate the effectiveness of this straightforward yet powerful strategy in mitigating imbalanced multi-view learning issues, particularly on complex many-view datasets exceeding three views. Extensive evaluations across 13 multi-view datasets validate the superior performance of our proposed method compared to other trusted multi-view learning approaches. The code is available at https://github.com/fupinhan123/TEF.

Multi-task learning deals with multiple related tasks simultaneously by sharing knowledge. In a typical deep multi-task learning model, all tasks use the same feature space and share the latent knowledge. If the tasks are weakly correlated or some features are negatively correlated, sharing all knowledge often leads to negative knowledge transfer among. To overcome this issue, this paper proposes a Fisher sparse multi-task learning method. It can obtain a sparse sharing representation for each task. In such a way, tasks share features on a sparse subspace. Our method can ensure that the knowledge transferred among tasks is beneficial. Specifically, we first propose a sparse deep multi-task learning model, and then introduce Fisher sparse module into traditional deep multi-task learning to learn the sparse variables of task. By alternately updating the neural network parameters and sparse variables, a sparse sharing representation can be learned for each task. In addition, in order to reduce the computational overhead, an heuristic method is used to estimate the Fisher information of neural network parameters. Experimental results show that, comparing with other methods, our proposed method can improve the performance for all tasks, and has high sparsity in multi-task learning.

Multi-task learning uses knowledge transfer among tasks to improve the generalization performance of all tasks. For deep multi-task learning, knowledge transfer is often implemented via sharing all hidden features of tasks. A major shortcoming is that it can lead to negative knowledge transfer across tasks when task correlation is weak. To overcome it, this paper proposes an evolutionary method to learn sparse sharing representations adaptively. By embedding the neural network optimization into evolutionary multitasking, our proposed method finds an optimal combination of tasks and sharing features. It can identify negative correlation and redundant features and then remove them from the hidden feature set. Thus, an optimal sparse sharing subnetwork can be produced for each task. Experiment results show that the proposed method achieve better learning performance with a smaller inference model than other related methods.

Fuzzy clustering ensemble that combines multiple fuzzy clustering results can obtain more robust, novel, stable, and consistent clustering result. The research about fuzzy clustering ensemble is still in the initial stage. Due to the special information expression, excellent clustering ideas are not well-practiced in fuzzy clustering ensemble and the performance of fuzzy clustering ensemble still has a large improvement space. In data clustering, prototype-based clustering is effective and efficient. The main idea of prototype-based clustering is discovering prototype samples to represent clusters and assigning samples to the represented clusters. In this article, we draw the idea of prototype-based clustering to fuzzy clustering ensemble and handle the problems of how to discover prototype samples based on a set of fuzzy clustering results and how to assign the samples without accessing the original data features. First, we propose a self-coassociation measure of a sample and discover its natural ability to evaluate the sample's local density. The rationality of the prototype samples discovered based on self-coassociation is theoretically analyzed and visually shown on eight artificial data sets. Then, we propose a prototype propagation method to assign data samples gradually. The working mechanism of the proposed sample assignment method is visually shown in the image segmentation scene. Finally, we develop a fuzzy clustering ensemble method based on self-coassociation and prototype propagation. The effectiveness of the proposed method is illustrated by comparing it with eight representative methods on benchmark datasets.