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CFSE: a Chinese short text classification method based on character frequency sub-word enhancement 基于字符频率子词增强的中文短文本分类方法
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-10-06 DOI: 10.1080/09540091.2023.2263663
Xingguang Wang, Shunxiang Zhang, Zichen Ma, Yunduo Liu, Youqiang Zhang
As a foundation task of natural language processing, text classification is widely used in information retrieval, public opinion analysis, and other related tasks. Facing the problem of sparse features of Chinese short texts, which affects the classification accuracy of Chinese short texts, this paper proposes a Chinese short text classification method based on the Character Frequency Sub-word Enhancement (CFSE), which can effectively improve the classification accuracy of Chinese short texts. First, the initial Chinese-character sequence is mapped to the corresponding Character Frequency Sub-word (CFS) sequence based on the global character1 frequency information. Second, the relationship features among data are extracted based on BiLSTM-Att processing CFS sequence, and the semantic features of the initial Chinese-character sequence are obtained through ERNIE. Finally, these two kinds of features are fused and input into the text classifier to obtain the classification results. Experimental results show that the proposed method can improve the classification accuracy of Chinese short texts.
文本分类作为自然语言处理的基础任务,广泛应用于信息检索、舆情分析等相关任务中。针对中文短文本特征稀疏影响中文短文本分类精度的问题,本文提出了一种基于字符频率子词增强(CFSE)的中文短文本分类方法,可以有效地提高中文短文本的分类精度。首先,基于全局字符1频率信息,将初始汉字序列映射到相应的字符频率子词(CFS)序列;其次,基于BiLSTM-Att处理的CFS序列提取数据间的关系特征,并通过ERNIE获得初始汉字序列的语义特征;最后,将这两种特征融合并输入到文本分类器中,得到分类结果。实验结果表明,该方法可以提高中文短文本的分类准确率。
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引用次数: 0
NAS-YOLOX: a SAR ship detection using neural architecture search and multi-scale attention NAS-YOLOX:一种基于神经结构搜索和多尺度关注的SAR舰船检测方法
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-10-04 DOI: 10.1080/09540091.2023.2257399
Hao Wang, Dezhi Han, Mingming Cui, Chongqing Chen
Due to the advantages of all-weather capability and high resolution, synthetic aperture radar (SAR) image ship detection has been widely applied in the military, civilian, and other domains. However, SAR-based ship detection suffers from limitations such as strong scattering of targets, multiple scales, and background interference, leading to low detection accuracy. To address these limitations, this paper presents a novel SAR ship detection method, NAS-YOLOX, which leverages the efficient feature fusion of the neural architecture search feature pyramid network (NAS-FPN) and the effective feature extraction of the multi-scale attention mechanism. Specifically, NAS-FPN replaces the PAFPN in the baseline YOLOX, greatly enhances the fusion performance of the model’s multi-scale feature information, and a dilated convolution feature enhancement module (DFEM) is designed and integrated into the backbone network to improve the network’s receptive field and target information extraction capabilities. Furthermore, a multi-scale channel-spatial attention (MCSA) mechanism is conceptualised to enhance focus on target regions, improve small-scale target detection, and adapt to multi-scale targets. Additionally, extensive experiments conducted on benchmark datasets, HRSID and SSDD, demonstrate that NAS-YOLOX achieves comparable or superior performance compared to other state-of-the-art ship detection models and reaches best accuracies of 91.1% and 97.2% on AP0.5, respectively.
合成孔径雷达(SAR)图像舰船检测由于具有全天候能力和高分辨率等优点,在军事、民用等领域得到了广泛的应用。然而,基于sar的舰船检测存在目标散射强、多尺度、背景干扰等局限性,导致检测精度较低。针对这些局限性,本文提出了一种新的SAR船舶检测方法NAS-YOLOX,该方法利用神经结构搜索特征金字塔网络(NAS-FPN)的高效特征融合和多尺度注意机制的有效特征提取。具体而言,NAS-FPN取代了基线YOLOX中的PAFPN,大大增强了模型多尺度特征信息的融合性能,并设计了扩展卷积特征增强模块(expanded convolution feature enhancement module, DFEM)集成到骨干网中,提高了网络的感受野和目标信息提取能力。在此基础上,提出了一种多尺度通道-空间注意(MCSA)机制,以增强对目标区域的关注,提高小尺度目标的检测能力,适应多尺度目标。此外,在基准数据集HRSID和SSDD上进行的大量实验表明,NAS-YOLOX与其他最先进的船舶检测模型相比具有相当或更好的性能,在AP0.5上分别达到了91.1%和97.2%的最佳精度。
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引用次数: 0
Dual conditional GAN based on external attention for semantic image synthesis 基于外部注意的双条件GAN语义图像合成
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-10-04 DOI: 10.1080/09540091.2023.2259120
Gang Liu, Qijun Zhou, Xiaoxiao Xie, Qingchen Yu
Although the existing semantic image synthesis methods based on generative adversarial networks (GANs) have achieved great success, the quality of the generated images still cannot achieve satisfactory results. This is mainly caused by two reasons. One reason is that the information in the semantic layout is sparse. Another reason is that a single constraint cannot effectively control the position relationship between objects in the generated image. To address the above problems, we propose a dual-conditional GAN with based on an external attention for semantic image synthesis (DCSIS). In DCSIS, the adaptive normalization method uses the one-hot encoded semantic layout to generate the first latent space and the external attention uses the RGB encoded semantic layout to generate the second latent space. Two latent spaces control the shape of objects and the positional relationship between objects in the generated image. The graph attention (GAT) is added to the generator to strengthen the relationship between different categories in the generated image. A graph convolutional segmentation network (GSeg) is designed to learn information for each category. Experiments on several challenging datasets demonstrate the advantages of our method over existing approaches, regarding both visual quality and the representative evaluating criteria.
虽然现有的基于生成式对抗网络(GANs)的语义图像合成方法已经取得了很大的成功,但生成的图像质量仍然不能达到令人满意的效果。这主要由两个原因造成。一个原因是语义布局中的信息是稀疏的。另一个原因是单一约束不能有效控制生成图像中物体之间的位置关系。为了解决上述问题,我们提出了一种基于外部关注的语义图像合成双条件GAN (DCSIS)。在DCSIS中,自适应归一化方法使用单热编码语义布局生成第一潜空间,外部注意使用RGB编码语义布局生成第二潜空间。两个隐空间控制着生成图像中物体的形状和物体之间的位置关系。在生成器中加入图注意(GAT)来加强生成图像中不同类别之间的关系。设计了一个图卷积分割网络(GSeg)来学习每个类别的信息。在几个具有挑战性的数据集上的实验证明了我们的方法在视觉质量和代表性评估标准方面优于现有方法。
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引用次数: 0
High-performance computing for static security assessment of large power systems 大型电力系统静态安全评估的高性能计算
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-10-04 DOI: 10.1080/09540091.2023.2264537
Venkateswara Rao Kagita, Sanjaya Kumar Panda, Ram Krishan, P. Deepak Reddy, Jabba Aswanth
Contingency analysis (CA) is one of the essential tools for the optimal design and security assessment of a reliable power system. However, its computational requirements rise with the growth of distributed generations in the interconnected power system. As CA is a complex and computationally intensive problem, it requires a fast and accurate calculation to ensure the secure operation. Therefore, efficient mathematical modelling and parallel programming are key to efficient static security analysis. This paper proposes a parallel algorithm for static CA that uses both central processing units (CPUs) and graphical processing units (GPUs). To enhance the accuracy, AC load flow is used, and parallel computation of load flow is done simultaneously, with efficient screening and ranking of the critical contingencies. We perform extensive experiments to evaluate the efficacy of the proposed algorithm. As a result, we establish that the proposed parallel algorithm with high-performance computing (HPC) computing is much faster than the traditional algorithms. Furthermore, the HPC experiments were conducted using the national supercomputing facility, which demonstrates the proposed algorithm in the context of N−1 and N−2 static CA with immense power systems, such as the Indian northern regional power grid (NRPG) 246-bus and the polish 2383-bus networks.
应急分析是进行可靠电力系统优化设计和安全评估的重要工具之一。然而,随着互联电力系统中分布式电源的增加,其计算量也随之增加。CA是一个复杂且计算量大的问题,为了保证安全运行,需要快速准确的计算。因此,高效的数学建模和并行编程是高效的静态安全分析的关键。本文提出了一种同时使用中央处理器(cpu)和图形处理器(gpu)的静态CA并行算法。为提高计算精度,采用交流潮流,同时进行潮流并行计算,有效筛选和排序临界事故。我们进行了大量的实验来评估所提出算法的有效性。结果表明,采用高性能计算(HPC)的并行算法比传统算法运行速度快得多。此外,利用国家超级计算设施进行了HPC实验,验证了所提出的算法在大型电力系统(如印度北部地区电网(NRPG) 246总线和波兰2383总线网络)的N−1和N−2静态CA环境下的性能。
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引用次数: 0
Neighbor interaction-based personalised transfer for cross-domain recommendation 基于邻居交互的跨域推荐个性化转移
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-09-29 DOI: 10.1080/09540091.2023.2263664
Kelei Sun, Yingying Wang, Mengqi He, Huaping Zhou, Shunxiang Zhang
Mapping-based cross-domain recommendation (CDR) can effectively tackle the cold-start problem in traditional recommender systems. However, existing mapping-based CDR methods ignore data-sparse users in the source domain, which may impact the transfer efficiency of their preferences. To this end, this paper proposes a novel method named Neighbor Interaction-based Personalized Transfer for Cross-Domain Recommendation (NIPT-CDR). This proposed method mainly contains two modules: (i) an intra-domain item supplementing module and (ii) a personalised feature transfer module. The first module introduces neighbour interactions to supplement the potential missing preferences for each source domain user, particularly for those with limited observed interactions. This approach comprehensively captures the preferences of all users. The second module develops an attention mechanism to guide the knowledge transfer process selectively. Moreover, a meta-network based on users' transferable features is trained to construct personalised mapping functions for each user. The experimental results on two real-world datasets show that the proposed NIPT-CDR method achieves significant performance improvements compared to seven baseline models. The proposed model can provide more accurate and personalised recommendation services for cold-start users.
基于映射的跨域推荐(CDR)可以有效地解决传统推荐系统的冷启动问题。然而,现有的基于映射的话单方法忽略了源域中数据稀疏的用户,这可能会影响用户偏好的传递效率。为此,本文提出了一种基于邻居交互的跨域推荐个性化传输方法(npt - cdr)。该方法主要包含两个模块:(1)域内项目补充模块和(2)个性化特征传递模块。第一个模块引入邻居交互,以补充每个源域用户潜在的缺失偏好,特别是对于那些观察到的交互有限的用户。这种方法全面地捕获了所有用户的偏好。第二个模块发展了一个注意力机制来有选择地引导知识转移过程。此外,基于用户可转移特征的元网络被训练为每个用户构建个性化的映射函数。在两个真实数据集上的实验结果表明,与七个基线模型相比,所提出的npt - cdr方法取得了显著的性能改进。该模型可以为冷启动用户提供更加精准、个性化的推荐服务。
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引用次数: 0
An efficiency control strategy of dual-motor multi-gear drive algorithm 双电机多齿轮驱动算法的高效控制策略
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-09-27 DOI: 10.1080/09540091.2023.2249264
Lijun Xiao, Wei Liang, Jiahong Cai, Ming Wang, Jiahong Xiao, Yinyan Gong, Weigang Zhang
The Dual-motor multi-gear coupling powertrain (DMCP) has the potential to improve transmission system efficiency and driving comfort, but its complex structure and multiple working modes present challenges. The switching between different modes is easy to cause longitudinal biggish vehicle jerk. To address these issues,this paper introduces the Deep Deterministic Policy Gradient (DDPG) algorithm in the design of an Energy Management Strategy (EMS) that minimises total drive power consumption. And the number of working modes is divided and simplified. The process of switching dual motor and single motor to single motor is introduced in detail. The simulation results using AMESim and MATLAB show that the energy management strategy can effectively improve the economy, achieve no power interruption during mode switching, shift impact is less than 8m/s3, and output torque is remains stable.
双电机多齿轮耦合动力系统(DMCP)具有提高传动系统效率和驾驶舒适性的潜力,但其复杂的结构和多种工作模式给汽车带来了挑战。不同模式之间的切换容易造成车辆纵向较大的抖动。为了解决这些问题,本文在能量管理策略(EMS)的设计中引入了深度确定性策略梯度(DDPG)算法,以最小化总驱动功耗。并对工作模式的数量进行了划分和简化。详细介绍了双电机和单电机切换到单电机的过程。基于AMESim和MATLAB的仿真结果表明,能量管理策略能有效提高经济性,实现模式切换时无电源中断,换档冲击小于8m/s3,输出转矩保持稳定。
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引用次数: 0
CPW-DICE: a novel center and pixel-based weighting for damage segmentation CPW-DICE:一种新的基于中心和像素的损伤分割加权方法
4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-09-26 DOI: 10.1080/09540091.2023.2259115
Yunus Abdi, Ömer Küllü, Mehmet Kıvılcım Keleş, Berk Gökberk
Reliable evaluation of damage in vehicles is a primary concern in the insurance industry. Consequently, solutions enhanced with Artificial Intelligence (AI) have become the norm. During the assessment, precise damage segmentation plays a crucial role. Dent is a type of damage that can commonly occur in vehicles. It is difficult to pinpoint and tends to blend in with the background. This paper proposes a novel loss function to improve dent segmentation accuracy in vehicle insurance claims. Centre and Pixel-based Weighted DICE (CPW-DICE) is a loss function that performs pixel-based weighting. The CPW-DICE aims to concentrate on the centre of the dent damage to lessen faulty segmentations. CPW-DICE generates a weight mask during training by employing ground truth (GT) and prediction masks. Simultaneously, the weight mask is incorporated into DICE loss. Experiments conducted on our comprehensive internal dataset show a 3% improvement in Intersection over Union (IoU) score for three state-of-the-art (SOTA) approaches compared to DICE loss. Finally, CPW-DICE is evaluated in similar tasks to demonstrate its benefits beyond car damage segmentation.
对车辆损坏的可靠评估是保险行业的首要问题。因此,人工智能(AI)增强的解决方案已成为常态。在评估过程中,精确的损伤分割是至关重要的。凹痕是一种通常发生在车辆上的损伤。它很难精确定位,而且往往与背景融为一体。为了提高汽车保险索赔中凹痕分割的准确性,提出了一种新的损失函数。中心和基于像素的加权DICE (CPW-DICE)是一个执行基于像素加权的损失函数。CPW-DICE的目的是集中在凹痕损伤的中心,以减少错误的分割。CPW-DICE在训练过程中利用ground truth (GT)和prediction mask生成权重mask。同时,权重掩模被纳入DICE损失。在我们全面的内部数据集上进行的实验表明,与DICE损失相比,三种最先进的(SOTA)方法在交汇(IoU)得分上提高了3%。最后,在类似的任务中对CPW-DICE进行评估,以证明其在汽车损伤分割之外的好处。
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引用次数: 0
Detecting susceptible communities and individuals in hospital contact networks: a model based on social network analysis 检测医院接触网络中的易感社区和个人:基于社会网络分析的模型
IF 5.3 4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-08-22 DOI: 10.1080/09540091.2023.2236810
Yixuan Yang, Sony Peng, Sophort Siet, Sadriddinov Ilkhomjon, Vilakone Phonexay, Seok-Hoon Kim, Doosoon Park
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引用次数: 0
Design of advanced intrusion detection systems based on hybrid machine learning techniques in hierarchically wireless sensor networks 分层无线传感器网络中基于混合机器学习技术的高级入侵检测系统设计
IF 5.3 4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-08-22 DOI: 10.1080/09540091.2023.2246703
Gebrekiros Gebreyesus Gebremariam, J. Panda, S. Indu
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引用次数: 0
Real-time reading system for pointer meter based on YolactEdge 基于YolactEdge的指针式仪表实时读数系统
IF 5.3 4区 计算机科学 Q2 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Pub Date : 2023-08-22 DOI: 10.1080/09540091.2023.2241669
Chengjun Yang, Ruijie Zhu, Xinde Yu, Ce Yang, Lijun Xiao, Scott Fowler
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引用次数: 0
期刊
Connection Science
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