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Hypergraph-based eaves tile dating method under data imbalance conditions
Xing QIU, Zuxing XUAN, Kejia HUANG, Wen ZHANG, Xiao ZHUANG
Journal of Computer Applications    2026, 46 (2): 620-629.   DOI: 10.11772/j.issn.1001-9081.2025010030
Abstract64)   HTML0)    PDF (2193KB)(44)       Save

To address inefficiency and subjectivity of manual eaves tile dating methods, a Hypergraph-based Eaves Tile Dating method under Data Imbalance Conditions (HETD-DIC) was proposed to provide a more objective assistive tool for archaeological dating. Firstly, a dual-weight computation mechanism was designed, which means that a hyperedge weight computation module was used to aggregate associated node features, so as to generate hyperedge weights, and these hyperedge weights were then used to calculate node weights, which reduced the impact of imbalanced sample distribution. Secondly, a Hyperedge Node Relation Matrix (HNRM) was constructed to establish a feature encoding-decoding channel, so as to enhance the representation capability of nodes. Finally, extensive experiments were conducted to evaluate different models, and UniGIN (Unified Graph Isomorphism Network) was selected as baseline classification model due to its superior performance. Experimental results demonstrate that on the self-built eaves tile dataset, with only 20% of training data used, HETD-DIC achieves improvements of 4.67, 4.55, 4.67, and 5.09 percentage points, respectively, compared to UniGIN in accuracy, weighted precision, weighted recall, and weighted F1-score. It can be seen that HETD-DIC solves data imbalance problem effectively and provides reliable automatic assisted decision basis for archaeological dating.

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Construction method of voiceprint library based on multi-scale frequency-channel attention fusion
Tong CHEN, Fengyu YANG, Yu XIONG, Hong YAN, Fuxing QIU
Journal of Computer Applications    2024, 44 (8): 2407-2413.   DOI: 10.11772/j.issn.1001-9081.2023081276
Abstract91)   HTML2)    PDF (2240KB)(43)       Save

To address the problem that the accuracy of speaker verification is easily affected by external factors, a speaker verification algorithm was proposed based on a Multi-scale Frequency-Channel Attention fused Time-Delay Neural Network (MFCA-TDNN) model. Three improvements were made to MFCA-TDNN on the basis of the ECAPA-TDNN (Emphasized Channel Attention Propagation Aggregation Time Delay Neural Network), including: incorporating a multi-scale frequency-channel attention front-end to obtain high-resolution feature representations from speech, adding a multi-scale channel attention module to fuse multi-scale information by combining local and global features, and embedding a feature attention fusion module to weight the fusion features of multiple scales. These improvements enabled the model to make better use of multi-scale time-frequency information and improve recognition capability. Experimental results show that compared to the ECAPA-TDNN model, MFCA-TDNN model achieves a reduction of 5.9% and 7.9% in Equal Error Rate (EER) and minimum Detection Cost Function (minDCF), respectively, with the lowest EER of 3.83% and the lowest minDCF of 0.220 2.

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