We present observations of 1.5 square degree maps of the 12 CO, 13 CO, and C 18 O (J = 1 − 0) emission toward the complex region of the supernova remnant (SNR) W41 and SNR G22.7-0.2. A massive ( M 5 10 5´ ), large (∼84 × 15 pc), and dense (∼10 3 cm −3 ) giant molecular cloud (GMC), G23.0-0.4 with V LSR~7 7 km s −1 , is found to be adjacent to the two SNRs. The GMC displays a filamentary structure approximately along the Galactic plane. The filamentary structure of the dense molecular gas, traced by C 18 O (J = 1 − 0) emission, is also coincident well with the distribution of the dust-continuum emission in the direction. Two dense massive MC clumps, two 6.7 GHz methanol masers, and one H II/SNR complex, associated with the 77 km s −1 GMC G23.0-0.4, are aligned along the filamentary structure, indicating the star-forming activity within the GMC. These sources have periodic projected spacing of 0 18-0 26 along the giant filament, which is consistent with the theoretical predictions of 0 22. This indicates that the turbulence seems to dominate the fragmentation process of the dense gaseous filament on a large scale. The established 4.4 kpc distance of the GMC and the long dense filament traced by C 18 O emission, together with the rich massive star-formation groups in the nearby region, suggest that G23.0-0.4 is probably located at the near side of the Scutum-Centaurus arm in the first quadrant. Considering the large scale and the elongation structure along the Galactic plane, we speculate that the dense filamentary GMC is related to the spiral density wave of the Milky Way.

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The image captioning task has attracted great attention from many researchers, and significant progress has been made in the past few years. Existing image captioning models, which mainly apply attention‐based encoder‐decoder architecture, achieve great developments image captioning. These attention‐based models, however, are limited in the caption generation due to the potential errors resulting from the inaccurate detection of objects and incorrect attention to the objects. To alleviate the limitation, a Variational Joint Self‐Attention model (VJSA) is proposed to learn a latent semantic alignment between the given image and its label description for guiding better image captioning. Unlike the existing image captioning models, VJSA first uses a self‐attention module to encode the effective relationship information of intra‐sequence and inter‐sequences relationships. And then the variational neural inference module learns a distribution over the latent semantic alignment between the image and its corresponding description. In the decoding, the learned semantic alignment guides the decoder to generate the higher quality image caption. The results of the experiments reveal that the VJSA outperforms the compared models, and the performances of various metrics show that the proposed model is effective and feasible in image caption generation.

The great advances in computer vision and natural language processing make significant progress in visual question answering. In the visual question answering task, the visual representation is essential for understanding the image content. However, traditional methods rarely exploit the context information of the visual feature related to the question and the relation‐aware information to capture valuable visual representation. Therefore, a gated relation‐aware model is proposed to capture the enhanced visual representation for desiring answer prediction. The gated relation‐aware module can learn relation‐aware information between the visual feature and the context, and a certain object of an image, respectively. In addition, the proposed module can filter out the unnecessary relation‐aware information through the gate guided by the question semantic representation. The results of the conducted experiments show that the gated relation‐aware module makes a significant improvement on all answer categories.

Image captioning is a challenging task, which generates a sentence for a given image. The earlier captioning methods mainly decode the visual features to generate caption sentences for the image. However, the visual features lack the context semantic information which is vital for generating an accurate caption sentence. To address this problem, this paper first proposes the Attention-Aware (AA) mechanism which can filter out erroneous or irrelevant context semantic information. And then, AA is utilized to constitute a Context Semantic Auxiliary Network (CSAN), which can capture the effective context semantic information to regenerate or polish the image caption. Moreover, AA can capture the visual feature information needed to generate a caption. Experimental results show that our proposed CSAN outperforms the compared image captioning methods on MS COCO “Karpathy” offline test split and the official online testing server.