近年来，MMWave FMCW雷达吸引了人类居中应用的大量研究兴趣，例如人类姿态/活动识别。大多数现有的管道由传统的离散傅立叶变换（DFT）预处理和深神经网络分类器混合方法建立，其中大多数以前的作品专注于设计下游分类器以提高整体精度。在这项工作中，我们返回返回并查看预处理模块。为了避免传统DFT预处理的缺点，我们提出了一个名为Cubelearn的学习预处理模块，直接从原始雷达信号中提取特征，并为MMWAVE FMCW雷达运动识别应用构建端到端的深神经网络。广泛的实验表明，我们的立方体模块一直提高不同管道的分类准确性，特别是利益以前较弱的模型。我们提供关于所提出的模块的初始化方法和结构的消融研究，以及对PC和边缘设备上运行时间的评估。这项工作也用作不同方法对数据立方体切片的比较。通过我们的任务无关设计，我们向雷达识别问题提出了一步迈向通用端到端解决方案。

在本文中，我们介绍了一种新的端到端学习的LIDAR重新定位框架，被称为Pointloc，其仅使用单点云直接姿势作为输入，不需要预先构建的地图。与RGB基于图像的重建化相比，LIDAR帧可以提供有关场景的丰富和强大的几何信息。然而，LIDAR点云是无序的并且非结构化，使得难以为此任务应用传统的深度学习回归模型。我们通过提出一种具有自我关注的小说点风格架构来解决这个问题，从而有效地估计660 {\ DEG} LIDAR输入框架的6-DOF姿势。关于最近发布的巨大恐怖雷达机器人数据集和现实世界机器人实验的扩展实验表明ProposedMethod可以实现准确的重定位化性能。

时间接地的任务旨在在未经监控的视频中定位视频时刻，具有给定的句子查询。本文首次调查了某些特定于时间接地任务的肤浅偏差，并提出了一种新型靶向解决方案。最令人惊讶的是，我们观察到现有的时间地面模型在视觉模态中严重依赖于某些偏差（例如，高偏好或频繁概念或某些时间间隔的高偏好）。当在跨场景测试设置中概括模型时，这导致较差的性能。为此，我们提出了一种新颖的方法，称为Debiaded Temporal语言定位器（DebiaStll），以防止模型天鹅绒记忆偏差并强制基于真正的模态关系将查询句子接地。 Debias-TLL同时列举两种型号。通过我们的设计，当判断样品时，这两个模型的预测的大大差异显示出更高的偏置样品的概率。利用信息性差异，我们设计了一种用于缓解数据偏差的数据重称之度方案。我们评估跨场景时间接地中提出的模型，其中火车/测试数据是异构的。实验表明，与最先进的竞争对手相比，所提出的方法的大幅度优势。

在许多机器学习应用程序中出现了非convex-concave min-max问题，包括最大程度地减少一组非凸函数的最大程度，并对神经网络的强大对抗训练。解决此问题的一种流行方法是梯度下降（GDA）算法，不幸的是，在非凸性的情况下可以表现出振荡。在本文中，我们引入了一种“平滑”方案，该方案可以与GDA结合以稳定振荡并确保收敛到固定溶液。我们证明，稳定的GDA算法可以实现$ O（1/\ epsilon^2）$迭代复杂性，以最大程度地减少有限的非convex函数收集的最大值。此外，平滑的GDA算法达到了$ O（1/\ epsilon^4）$ toseration复杂性，用于一般的nonconvex-concave问题。提出了这种稳定的GDA算法的扩展到多块情况。据我们所知，这是第一个实现$ o（1/\ epsilon^2）$的算法，用于一类NonConvex-Concave问题。我们说明了稳定的GDA算法在健壮训练中的实际效率。

Compressed videos often exhibit visually annoying artifacts, known as Perceivable Encoding Artifacts (PEAs), which dramatically degrade video visual quality. Subjective and objective measures capable of identifying and quantifying various types of PEAs are critical in improving visual quality. In this paper, we investigate the influence of four spatial PEAs (i.e. blurring, blocking, bleeding, and ringing) and two temporal PEAs (i.e. flickering and floating) on video quality. For spatial artifacts, we propose a visual saliency model with a low computational cost and higher consistency with human visual perception. In terms of temporal artifacts, self-attention based TimeSFormer is improved to detect temporal artifacts. Based on the six types of PEAs, a quality metric called Saliency-Aware Spatio-Temporal Artifacts Measurement (SSTAM) is proposed. Experimental results demonstrate that the proposed method outperforms state-of-the-art metrics. We believe that SSTAM will be beneficial for optimizing video coding techniques.

As one of the most important psychic stress reactions, micro-expressions (MEs), are spontaneous and transient facial expressions that can reveal the genuine emotions of human beings. Thus, recognizing MEs (MER) automatically is becoming increasingly crucial in the field of affective computing, and provides essential technical support in lie detection, psychological analysis and other areas. However, the lack of abundant ME data seriously restricts the development of cutting-edge data-driven MER models. Despite the recent efforts of several spontaneous ME datasets to alleviate this problem, it is still a tiny amount of work. To solve the problem of ME data hunger, we construct a dynamic spontaneous ME dataset with the largest current ME data scale, called DFME (Dynamic Facial Micro-expressions), which includes 7,526 well-labeled ME videos induced by 671 participants and annotated by more than 20 annotators throughout three years. Afterwards, we adopt four classical spatiotemporal feature learning models on DFME to perform MER experiments to objectively verify the validity of DFME dataset. In addition, we explore different solutions to the class imbalance and key-frame sequence sampling problems in dynamic MER respectively on DFME, so as to provide a valuable reference for future research. The comprehensive experimental results show that our DFME dataset can facilitate the research of automatic MER, and provide a new benchmark for MER. DFME will be published via https://mea-lab-421.github.io.

Face Anti-spoofing (FAS) is essential to secure face recognition systems from various physical attacks. However, recent research generally focuses on short-distance applications (i.e., phone unlocking) while lacking consideration of long-distance scenes (i.e., surveillance security checks). In order to promote relevant research and fill this gap in the community, we collect a large-scale Surveillance High-Fidelity Mask (SuHiFiMask) dataset captured under 40 surveillance scenes, which has 101 subjects from different age groups with 232 3D attacks (high-fidelity masks), 200 2D attacks (posters, portraits, and screens), and 2 adversarial attacks. In this scene, low image resolution and noise interference are new challenges faced in surveillance FAS. Together with the SuHiFiMask dataset, we propose a Contrastive Quality-Invariance Learning (CQIL) network to alleviate the performance degradation caused by image quality from three aspects: (1) An Image Quality Variable module (IQV) is introduced to recover image information associated with discrimination by combining the super-resolution network. (2) Using generated sample pairs to simulate quality variance distributions to help contrastive learning strategies obtain robust feature representation under quality variation. (3) A Separate Quality Network (SQN) is designed to learn discriminative features independent of image quality. Finally, a large number of experiments verify the quality of the SuHiFiMask dataset and the superiority of the proposed CQIL.

Interview has been regarded as one of the most crucial step for recruitment. To fully prepare for the interview with the recruiters, job seekers usually practice with mock interviews between each other. However, such a mock interview with peers is generally far away from the real interview experience: the mock interviewers are not guaranteed to be professional and are not likely to behave like a real interviewer. Due to the rapid growth of online recruitment in recent years, recruiters tend to have online interviews, which makes it possible to collect real interview data from real interviewers. In this paper, we propose a novel application named EZInterviewer, which aims to learn from the online interview data and provides mock interview services to the job seekers. The task is challenging in two ways: (1) the interview data are now available but still of low-resource; (2) to generate meaningful and relevant interview dialogs requires thorough understanding of both resumes and job descriptions. To address the low-resource challenge, EZInterviewer is trained on a very small set of interview dialogs. The key idea is to reduce the number of parameters that rely on interview dialogs by disentangling the knowledge selector and dialog generator so that most parameters can be trained with ungrounded dialogs as well as the resume data that are not low-resource. Evaluation results on a real-world job interview dialog dataset indicate that we achieve promising results to generate mock interviews. With the help of EZInterviewer, we hope to make mock interview practice become easier for job seekers.

Nowadays, time-stamped web documents related to a general news query floods spread throughout the Internet, and timeline summarization targets concisely summarizing the evolution trajectory of events along the timeline. Unlike traditional document summarization, timeline summarization needs to model the time series information of the input events and summarize important events in chronological order. To tackle this challenge, in this paper, we propose a Unified Timeline Summarizer (UTS) that can generate abstractive and extractive timeline summaries in time order. Concretely, in the encoder part, we propose a graph-based event encoder that relates multiple events according to their content dependency and learns a global representation of each event. In the decoder part, to ensure the chronological order of the abstractive summary, we propose to extract the feature of event-level attention in its generation process with sequential information remained and use it to simulate the evolutionary attention of the ground truth summary. The event-level attention can also be used to assist in extracting summary, where the extracted summary also comes in time sequence. We augment the previous Chinese large-scale timeline summarization dataset and collect a new English timeline dataset. Extensive experiments conducted on these datasets and on the out-of-domain Timeline 17 dataset show that UTS achieves state-of-the-art performance in terms of both automatic and human evaluations.

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.