Qiang Wang

Guoqing Zhu, Honghu Pan, Qiang Wang et al.

In challenging low light and adverse weather conditions,thermal vision algorithms,especially object detection,have exhibited remarkable potential,contrasting with the frequent struggles encountered by visible vision algorithms. Nevertheless,the efficacy of thermal vision algorithms driven by deep learning models remains constrained by the paucity of available training data samples. To this end,this paper introduces a novel approach termed the edge guided conditional diffusion model. This framework aims to produce meticulously aligned pseudo thermal images at the pixel level,leveraging edge information extracted from visible images. By utilizing edges as contextual cues from the visible domain,the diffusion model achieves meticulous control over the delineation of objects within the generated images. To alleviate the impacts of those visible-specific edge information that should not appear in the thermal domain,a two-stage modality adversarial training strategy is proposed to filter them out from the generated images by differentiating the visible and thermal modality. Extensive experiments on LLVIP demonstrate ECDM s superiority over existing state-of-the-art approaches in terms of image generation quality.

Qiang Wang, Liying Yang

Multi-source domain adaptation represents an effective approach to addressing individual differences in cross-subject EEG emotion recognition. However, existing methods treat all source domains equally, neglecting the varying transfer difficulties between different source domains and the target domain. This oversight can lead to suboptimal adaptation. To address this challenge, we propose a novel Hard-Easy Dual Network (HEDN), which dynamically identifies "Hard Source" and "Easy Source" through a Task Difficulty Assessment (TDA) mechanism and establishes two specialized knowledge adaptation branches. Specifically, the Hard Network is dedicated to handling "Hard Source" with higher transfer difficulty by aligning marginal distribution differences between source and target domains. Conversely, the Easy Network focuses on "Easy Source" with low transfer difficulty, utilizing a prototype classifier to model intra-class clustering structures while generating reliable pseudo-labels for the target domain through a prototype-guided label propagation algorithm. Extensive experiments on two benchmark datasets, SEED and SEED-IV, demonstrate that HEDN achieves state-of-the-art performance in cross-subject EEG emotion recognition, with average accuracies of 93.58\% on SEED and 79.82\% on SEED-IV, respectively. These results confirm the effectiveness and generalizability of HEDN in cross-subject EEG emotion recognition.

Chen Xu, Qiang Wang, Lijun Sun

Accurate travel time estimation is essential for navigation and itinerary planning. While existing research employs probabilistic modeling to assess travel time uncertainty and account for correlations between multiple trips, modeling the temporal variability of multi-trip travel time distributions remains a significant challenge. Capturing the evolution of joint distributions requires large, well-organized datasets; however, real-world trip data are often temporally sparse and spatially unevenly distributed. To address this issue, we propose SPTTE, a spatiotemporal probabilistic framework that models the evolving joint distribution of multi-trip travel times by formulating the estimation task as a spatiotemporal stochastic process regression problem with fragmented observations. SPTTE incorporates an RNN-based temporal Gaussian process parameterization to regularize sparse observations and capture temporal dependencies. Additionally, it employs a prior-based heterogeneity smoothing strategy to correct unreliable learning caused by unevenly distributed trips, effectively modeling temporal variability under sparse and uneven data distributions. Evaluations on real-world datasets demonstrate that SPTTE outperforms state-of-the-art deterministic and probabilistic methods by over 10.13%. Ablation studies and visualizations further confirm the effectiveness of the model components.