文本对图像综合旨在从特定文本描述中生成光真逼真和语义一致的图像。与相应的图像和文本描述相比,由现成模型合成的图像通常包含有限的组件,从而降低了图像质量和文本 - 视觉一致性。为了解决这个问题,我们提出了一种新颖的视觉语言匹配策略,用于文本对图像综合,名为Vlmgan*,该策略介绍了一种双重视觉语言匹配机制,以增强图像质量和语义一致性。双视性匹配机制考虑了生成的图像与相应的文本描述之间的文本 - 视觉匹配,以及综合图像和真实图像之间的视觉视觉视觉一致约束。给定特定的文本描述,vlmgan*首先将其编码为文本特征,然后将它们馈送到基于双视觉匹配的生成模型中,以合成光合逼真的和文本的语义一致图像。此外,文本对图像合成的流行评估指标是从简单图像生成中借用的,该图像生成主要评估合成图像的现实和多样性。因此,我们引入了一个名为Vision语言匹配分数(VLMS)的度量标准,以评估文本对图像合成的性能,该分数可以考虑综合图像和描述之间的图像质量和语义一致性。所提出的双重多层视觉匹配策略可以应用于其他文本对图像合成方法。我们在两个受欢迎的基线上实现了此策略,这些基线用$ {\ text {vlmgan} _ {+\ text {attngan}}} $和$ {\ text {vlmgan} _ {+\ text {+\ text {+\ {+\ text {+\ text {dfgan}}} $ 。两个广泛使用的数据集的实验结果表明,该模型比其他最先进的方法实现了重大改进。
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基于文本的人检索旨在根据文本描述找到查询人员。关键是学习视觉文本模式之间的常见潜在空间映射。为了实现这一目标,现有的作品采用细分来获得明确的跨模式对齐方式或利用注意力来探索显着对准。这些方法有两个缺点:1)标记交叉模式比对很耗时。 2)注意方法可以探索显着的跨模式对齐,但可能会忽略一些微妙而有价值的对。为了缓解这些问题,我们为基于文本的人检索引入了一个隐式视觉文本(IVT)框架。与以前的模型不同,IVT利用单个网络来学习两种模式的表示形式,这有助于视觉文本相互作用。为了探索细粒的对准,我们进一步提出了两个隐式语义比对范式:多级比对(MLA)和双向掩码建模(BMM)。 MLA模块在句子,短语和单词级别上探索了更精细的匹配,而BMM模块旨在挖掘视觉和文本模态之间的\ textbf {更多}语义对齐。进行了广泛的实验,以评估公共数据集中提出的IVT,即Cuhk-Pedes,RSTPREID和ICFG-PEDES。即使没有明确的身体部位对准,我们的方法仍然可以达到最先进的表现。代码可在以下网址获得:https://github.com/tencentyouturesearch/personretrieval-ivt。
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联合检测(COSOD)旨在从多个图像发现重复的显着物体。两个主要挑战是组语义提取和噪声对象抑制。在本文中,我们提出了COSOD的统一两阶段的语义传播和对比度学习网络(主题网络)。主题网络可以分解为两个子结构,包括两个阶段的语义传播模块(TGSP),以应对第一个挑战和对比度学习模块(CLM),以应对第二个挑战。具体来说,对于TGSP,我们设计了一个图像到群体传播模块(IGP)来捕获组内相似特征的共识表示和小像素传播模块(GPP),以构建共识表示的相关性。对于CLM,随着阳性样品的设计,语义一致性得到了增强。通过设计负样品的设计,噪声对象被抑制。关于三个主要基准测试的实验结果表明,主题网络在各种评估指标方面都优于其他竞争对手。
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最近,跨模式的预训练任务一直是一个热点,因为它在各种下文研究中广泛应用,包括检索,字幕,问题答案等。然而,退出的方法采用单媒体预训练模型来探索进行跨模式检索的联合视觉表示,这很容易遭受计算爆炸的影响。此外,尽管常规的双流结构非常有效,但它们仍然缺乏重要的跨模式相互作用,导致性能低。在这些挑战的激励下,我们提出了一个对比的跨模式知识共享预训练(Cookie),以掌握联合文本图像表示。从结构上讲,Cookie由于可接受的时间消耗而采用了传统的双流结构。为了克服上述双流结构的固有缺陷,我们精心设计了两个有效的模块。具体而言,第一个模块是一个体重共享的变压器,它构建在视觉和文本编码器的头上,旨在将语义对齐文本和图像对齐。该设计使视觉和文本路径集中在相同的语义上。另一个是三个专门设计的对比学习,旨在分享不同模型之间的知识。共享的跨模式知识大大发展了单峰表示的研究,从而促进了单模式检索任务。对多模式匹配研究的广泛实验结果,包括跨模式检索,文本匹配和图像检索揭示了我们的计算效率和我们预训练模型的统计指标的上级。
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Knowledge graph embedding (KGE), which maps entities and relations in a knowledge graph into continuous vector spaces, has achieved great success in predicting missing links in knowledge graphs. However, knowledge graphs often contain incomplete triples that are difficult to inductively infer by KGEs. To address this challenge, we resort to analogical inference and propose a novel and general self-supervised framework AnKGE to enhance KGE models with analogical inference capability. We propose an analogical object retriever that retrieves appropriate analogical objects from entity-level, relation-level, and triple-level. And in AnKGE, we train an analogy function for each level of analogical inference with the original element embedding from a well-trained KGE model as input, which outputs the analogical object embedding. In order to combine inductive inference capability from the original KGE model and analogical inference capability enhanced by AnKGE, we interpolate the analogy score with the base model score and introduce the adaptive weights in the score function for prediction. Through extensive experiments on FB15k-237 and WN18RR datasets, we show that AnKGE achieves competitive results on link prediction task and well performs analogical inference.
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For Prognostics and Health Management (PHM) of Lithium-ion (Li-ion) batteries, many models have been established to characterize their degradation process. The existing empirical or physical models can reveal important information regarding the degradation dynamics. However, there is no general and flexible methods to fuse the information represented by those models. Physics-Informed Neural Network (PINN) is an efficient tool to fuse empirical or physical dynamic models with data-driven models. To take full advantage of various information sources, we propose a model fusion scheme based on PINN. It is implemented by developing a semi-empirical semi-physical Partial Differential Equation (PDE) to model the degradation dynamics of Li-ion-batteries. When there is little prior knowledge about the dynamics, we leverage the data-driven Deep Hidden Physics Model (DeepHPM) to discover the underlying governing dynamic models. The uncovered dynamics information is then fused with that mined by the surrogate neural network in the PINN framework. Moreover, an uncertainty-based adaptive weighting method is employed to balance the multiple learning tasks when training the PINN. The proposed methods are verified on a public dataset of Li-ion Phosphate (LFP)/graphite batteries.
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In this tutorial paper, we look into the evolution and prospect of network architecture and propose a novel conceptual architecture for the 6th generation (6G) networks. The proposed architecture has two key elements, i.e., holistic network virtualization and pervasive artificial intelligence (AI). The holistic network virtualization consists of network slicing and digital twin, from the aspects of service provision and service demand, respectively, to incorporate service-centric and user-centric networking. The pervasive network intelligence integrates AI into future networks from the perspectives of networking for AI and AI for networking, respectively. Building on holistic network virtualization and pervasive network intelligence, the proposed architecture can facilitate three types of interplay, i.e., the interplay between digital twin and network slicing paradigms, between model-driven and data-driven methods for network management, and between virtualization and AI, to maximize the flexibility, scalability, adaptivity, and intelligence for 6G networks. We also identify challenges and open issues related to the proposed architecture. By providing our vision, we aim to inspire further discussions and developments on the potential architecture of 6G.
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In this paper, we investigate the joint device activity and data detection in massive machine-type communications (mMTC) with a one-phase non-coherent scheme, where data bits are embedded in the pilot sequences and the base station simultaneously detects active devices and their embedded data bits without explicit channel estimation. Due to the correlated sparsity pattern introduced by the non-coherent transmission scheme, the traditional approximate message passing (AMP) algorithm cannot achieve satisfactory performance. Therefore, we propose a deep learning (DL) modified AMP network (DL-mAMPnet) that enhances the detection performance by effectively exploiting the pilot activity correlation. The DL-mAMPnet is constructed by unfolding the AMP algorithm into a feedforward neural network, which combines the principled mathematical model of the AMP algorithm with the powerful learning capability, thereby benefiting from the advantages of both techniques. Trainable parameters are introduced in the DL-mAMPnet to approximate the correlated sparsity pattern and the large-scale fading coefficient. Moreover, a refinement module is designed to further advance the performance by utilizing the spatial feature caused by the correlated sparsity pattern. Simulation results demonstrate that the proposed DL-mAMPnet can significantly outperform traditional algorithms in terms of the symbol error rate performance.
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Domain adaptation methods reduce domain shift typically by learning domain-invariant features. Most existing methods are built on distribution matching, e.g., adversarial domain adaptation, which tends to corrupt feature discriminability. In this paper, we propose Discriminative Radial Domain Adaptation (DRDR) which bridges source and target domains via a shared radial structure. It's motivated by the observation that as the model is trained to be progressively discriminative, features of different categories expand outwards in different directions, forming a radial structure. We show that transferring such an inherently discriminative structure would enable to enhance feature transferability and discriminability simultaneously. Specifically, we represent each domain with a global anchor and each category a local anchor to form a radial structure and reduce domain shift via structure matching. It consists of two parts, namely isometric transformation to align the structure globally and local refinement to match each category. To enhance the discriminability of the structure, we further encourage samples to cluster close to the corresponding local anchors based on optimal-transport assignment. Extensively experimenting on multiple benchmarks, our method is shown to consistently outperforms state-of-the-art approaches on varied tasks, including the typical unsupervised domain adaptation, multi-source domain adaptation, domain-agnostic learning, and domain generalization.
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Collaboration among industrial Internet of Things (IoT) devices and edge networks is essential to support computation-intensive deep neural network (DNN) inference services which require low delay and high accuracy. Sampling rate adaption which dynamically configures the sampling rates of industrial IoT devices according to network conditions, is the key in minimizing the service delay. In this paper, we investigate the collaborative DNN inference problem in industrial IoT networks. To capture the channel variation and task arrival randomness, we formulate the problem as a constrained Markov decision process (CMDP). Specifically, sampling rate adaption, inference task offloading and edge computing resource allocation are jointly considered to minimize the average service delay while guaranteeing the long-term accuracy requirements of different inference services. Since CMDP cannot be directly solved by general reinforcement learning (RL) algorithms due to the intractable long-term constraints, we first transform the CMDP into an MDP by leveraging the Lyapunov optimization technique. Then, a deep RL-based algorithm is proposed to solve the MDP. To expedite the training process, an optimization subroutine is embedded in the proposed algorithm to directly obtain the optimal edge computing resource allocation. Extensive simulation results are provided to demonstrate that the proposed RL-based algorithm can significantly reduce the average service delay while preserving long-term inference accuracy with a high probability.
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