同时传输和反射可重构的智能表面(星际摩托车)是一种有前途的被动装置,通过同时传输和反映入射信号,从而有助于全空间覆盖。作为无线通信的新范式,如何分析星际轮胎的覆盖范围和能力性能变得至关重要,但具有挑战性。为了解决星际辅助网络中的覆盖范围和容量优化(CCO)问题,提出了多目标近端策略优化(MO-PPO)算法来处理长期利益,而不是传统优化算法。为了在每个目标之间取得平衡,MO-PPO算法提供了一组最佳解决方案,以形成Pareto前部(PF),其中PF上的任何解决方案都被视为最佳结果。此外,研究了为了提高MO-PPO算法的性能,两种更新策略,即基于动作值的更新策略(AVU)和基于损失功能的更新策略(LFUS)。对于AVU,改进的点是整合覆盖范围和容量的动作值,然后更新损失函数。对于LFU,改进的点仅是为覆盖范围和容量损失函数分配动态权重,而权重在每个更新时由最小值求解器计算出来。数值结果表明,调查的更新策略在不同情况下的固定权重优化算法优于MO优化算法,其中包括不同数量的样品网格,星轮的数量,星轮中的元素数量和大小星际船。此外,星际辅助网络比没有星际轮胎的传统无线网络获得更好的性能。此外,具有相同的带宽,毫米波能够提供比低6 GHz更高的容量,但覆盖率较小。
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提出了一种新型可重构智能表面辅助的多机器人网络,其中多个移动机器人通过非正交多重访问(NOMA)提供了多个移动机器人(AP)。目的是通过共同优化机器人的轨迹和NOMA解码顺序,RIS的相移系数以及AP的功率分配,从而最大化多机器人系统的整个轨迹的总和率机器人的位置和每个机器人的服务质量(QoS)。为了解决这个问题,提出了一个集成的机器学习(ML)方案,该方案结合了长期记忆(LSTM) - 自动进取的集成移动平均线(ARIMA)模型和Duel Duel Double Deep Q-network(D $^{3} $ QN)算法。对于机器人的初始和最终位置预测,LSTM-ARIMA能够克服非平稳和非线性数据序列的梯度销售问题。为了共同确定相移矩阵和机器人的轨迹,调用D $^{3} $ qn用于解决动作值高估的问题。基于提议的方案,每个机器人都基于整个轨迹的最大总和率持有全局最佳轨迹,该轨迹揭示了机器人为整个轨迹设计追求长期福利。数值结果表明:1)LSTM-ARIMA模型提供了高精度预测模型; 2)提出的d $^{3} $ qn算法可以实现快速平均收敛; 3)具有较高分辨率位的RI提供的轨迹比率比低分辨率比特更大; 4)与RIS AID的正交对应物相比,RIS-NOMA网络的网络性能卓越。
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有限的通信资源,例如带宽和能源以及设备之间的数据异质性是联合学习的两个主要瓶颈(FL)。为了应对这些挑战,我们首先使用部分模型聚合(PMA)设计了一个新颖的FL框架,该框架仅汇总负责特征提取的神经网络的下层,而与复杂模式识别相对应的上层仍保留在个性化设备上。提出的PMA-FL能够解决数据异质性并减少无线通道中的传输信息。然后,我们在非convex损耗函数设置下获得了框架的收敛结合。借助此界限,我们定义了一个新的目标函数,名为“计划数据样本量”,以将原始的不明智优化问题转移到可用于设备调度,带宽分配,计算和通信时间分配的可拖动问题中。我们的分析表明,当PMA-FL的沟通和计算部分具有相同的功率时,可以实现最佳时段。我们还开发了一种二级方法来解决最佳带宽分配策略,并使用SET扩展算法来解决最佳设备调度。与最先进的基准测试相比,提议的PMA-FL在两个典型的异质数据集(即Minist和CIFAR-10)上提高了2.72%和11.6%的精度。此外,提出的联合动态设备调度和资源优化方法的精度比考虑的基准略高,但它们提供了令人满意的能量和时间缩短:MNIST的29%能量或20%的时间缩短; CIFAR-10的能量和25%的能量或12.5%的时间缩短。
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Photorealistic style transfer aims to transfer the artistic style of an image onto an input image or video while keeping photorealism. In this paper, we think it's the summary statistics matching scheme in existing algorithms that leads to unrealistic stylization. To avoid employing the popular Gram loss, we propose a self-supervised style transfer framework, which contains a style removal part and a style restoration part. The style removal network removes the original image styles, and the style restoration network recovers image styles in a supervised manner. Meanwhile, to address the problems in current feature transformation methods, we propose decoupled instance normalization to decompose feature transformation into style whitening and restylization. It works quite well in ColoristaNet and can transfer image styles efficiently while keeping photorealism. To ensure temporal coherency, we also incorporate optical flow methods and ConvLSTM to embed contextual information. Experiments demonstrates that ColoristaNet can achieve better stylization effects when compared with state-of-the-art algorithms.
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Existing knowledge graph (KG) embedding models have primarily focused on static KGs. However, real-world KGs do not remain static, but rather evolve and grow in tandem with the development of KG applications. Consequently, new facts and previously unseen entities and relations continually emerge, necessitating an embedding model that can quickly learn and transfer new knowledge through growth. Motivated by this, we delve into an expanding field of KG embedding in this paper, i.e., lifelong KG embedding. We consider knowledge transfer and retention of the learning on growing snapshots of a KG without having to learn embeddings from scratch. The proposed model includes a masked KG autoencoder for embedding learning and update, with an embedding transfer strategy to inject the learned knowledge into the new entity and relation embeddings, and an embedding regularization method to avoid catastrophic forgetting. To investigate the impacts of different aspects of KG growth, we construct four datasets to evaluate the performance of lifelong KG embedding. Experimental results show that the proposed model outperforms the state-of-the-art inductive and lifelong embedding baselines.
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This paper introduces a new few-shot learning pipeline that casts relevance ranking for image retrieval as binary ranking relation classification. In comparison to image classification, ranking relation classification is sample efficient and domain agnostic. Besides, it provides a new perspective on few-shot learning and is complementary to state-of-the-art methods. The core component of our deep neural network is a simple MLP, which takes as input an image triplet encoded as the difference between two vector-Kronecker products, and outputs a binary relevance ranking order. The proposed RankMLP can be built on top of any state-of-the-art feature extractors, and our entire deep neural network is called the ranking deep neural network, or RankDNN. Meanwhile, RankDNN can be flexibly fused with other post-processing methods. During the meta test, RankDNN ranks support images according to their similarity with the query samples, and each query sample is assigned the class label of its nearest neighbor. Experiments demonstrate that RankDNN can effectively improve the performance of its baselines based on a variety of backbones and it outperforms previous state-of-the-art algorithms on multiple few-shot learning benchmarks, including miniImageNet, tieredImageNet, Caltech-UCSD Birds, and CIFAR-FS. Furthermore, experiments on the cross-domain challenge demonstrate the superior transferability of RankDNN.The code is available at: https://github.com/guoqianyu-alberta/RankDNN.
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Accurate localization ability is fundamental in autonomous driving. Traditional visual localization frameworks approach the semantic map-matching problem with geometric models, which rely on complex parameter tuning and thus hinder large-scale deployment. In this paper, we propose BEV-Locator: an end-to-end visual semantic localization neural network using multi-view camera images. Specifically, a visual BEV (Birds-Eye-View) encoder extracts and flattens the multi-view images into BEV space. While the semantic map features are structurally embedded as map queries sequence. Then a cross-model transformer associates the BEV features and semantic map queries. The localization information of ego-car is recursively queried out by cross-attention modules. Finally, the ego pose can be inferred by decoding the transformer outputs. We evaluate the proposed method in large-scale nuScenes and Qcraft datasets. The experimental results show that the BEV-locator is capable to estimate the vehicle poses under versatile scenarios, which effectively associates the cross-model information from multi-view images and global semantic maps. The experiments report satisfactory accuracy with mean absolute errors of 0.052m, 0.135m and 0.251$^\circ$ in lateral, longitudinal translation and heading angle degree.
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Incorporating large-scale pre-trained models with the prototypical neural networks is a de-facto paradigm in few-shot named entity recognition. Existing methods, unfortunately, are not aware of the fact that embeddings from pre-trained models contain a prominently large amount of information regarding word frequencies, biasing prototypical neural networks against learning word entities. This discrepancy constrains the two models' synergy. Thus, we propose a one-line-code normalization method to reconcile such a mismatch with empirical and theoretical grounds. Our experiments based on nine benchmark datasets show the superiority of our method over the counterpart models and are comparable to the state-of-the-art methods. In addition to the model enhancement, our work also provides an analytical viewpoint for addressing the general problems in few-shot name entity recognition or other tasks that rely on pre-trained models or prototypical neural networks.
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本文重新讨论了一个非常简单但非常有效的计算范式,深度共同学习(DML)。我们观察到,有效性与其出色的概括质量高度相关。在本文中,我们从新的角度来解释了DML的性能改善,即这大约是贝叶斯后的采样程序。这也为应用R \'{e} nyi Divergence改善原始DML的基础建立了基础,因为它带来了先验的差异控制(在DML的上下文中)。因此,我们提出了r \'{e} nyi Divergence深度共同学习(RDML)。我们的经验结果代表了DML和\ renyi {}差异的婚姻的优势。R \'{E} nyi Divergence施加的灵活控制能够进一步改进DML,以学习更好的广义模型。
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多年来,旨在从已知事实中推断出新结论的知识图(KGS)的推理主要集中在静态KG上。现实生活中知识的不断增长提出了使能够扩大KGS的归纳推理能力的必要性。现有的归纳工作假设新实体都在批处理中一次出现,这过度简化了新实体不断出现的实际情况。这项研究探讨了一个更现实,更具挑战性的环境,新实体分为多批次。我们提出了一个基于步行的归纳推理模型来解决新环境。具体而言,具有自适应关系聚合的图形卷积网络旨在使用其邻近关系编码和更新实体。为了捕捉不同的邻居的重要性,我们在聚合过程中采用了一种查询反馈注意机制。此外,为了减轻新实体的稀疏链接问题,我们提出了一种链接增强策略,以将可信赖的事实添加到KGS中。我们构建了三个新数据集,用于模拟此多批次出现方案。实验结果表明,我们所提出的模型优于基于最先进的基于嵌入的,基于步行的基于步行和基于规则的模型。
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