鼻咽癌（NPC）是由鼻咽引起的恶性上皮癌。生存预测是NPC患者的主要关注点，因为它提供了早期的预后信息来计划治疗。最近，基于深度学习的深层生存模型已经证明了胜过基于传统放射素学的生存预测模型的潜力。深度存活模型通常使用覆盖整个目标区域的图像贴片（例如，NPC的鼻咽）或仅包含分段肿瘤区域作为输入。但是，使用整个目标区域的模型还将包括非相关的背景信息，而使用分段肿瘤区域的模型将无视原发性肿瘤不存在的潜在预后信息（例如，局部淋巴结转移和相邻的组织侵入）。在这项研究中，我们提出了一个3D端到端的深层多任务生存模型（DEEPMTS），用于从预处理PET/CT的晚期NPC中进行关节存活预测和肿瘤分割。我们的新颖性是引入硬分段分割主链，以指导与原发性肿瘤相关的局部特征的提取，从而减少了非相关背景信息的干扰。此外，我们还引入了一个级联的生存网络，以捕获原发性肿瘤中存在的预后信息，并进一步利用从分段主链中得出的全球肿瘤信息（例如，肿瘤的大小，形状和位置）。我们使用两个临床数据集进行的实验表明，我们的DEEPMT始终超过传统的基于放射线学的生存预测模型和现有的深层生存模型。

目的：基于深度学习的放射素学（DLR）在医学图像分析中取得了巨大的成功，并被认为是依赖手工特征的常规放射线学的替代。在这项研究中，我们旨在探索DLR使用预处理PET/CT预测鼻咽癌（NPC）中5年无进展生存期（PFS）的能力。方法：总共招募了257名患者（内部/外部队列中的170/87），具有晚期NPC（TNM III期或IVA）。我们开发了一个端到端的多模式DLR模型，其中优化了3D卷积神经网络以从预处理PET/CT图像中提取深度特征，并预测了5年PFS的概率。作为高级临床特征，TNM阶段可以集成到我们的DLR模型中，以进一步提高预后性能。为了比较常规放射素学和DLR，提取了1456个手工制作的特征，并从54种特征选择方法和9种分类方法的54个交叉组合中选择了最佳常规放射线方法。此外，使用临床特征，常规放射线学签名和DLR签名进行风险组分层。结果：我们使用PET和CT的多模式DLR模型比最佳常规放射线方法获得了更高的预后性能。此外，多模式DLR模型仅使用PET或仅CT优于单模式DLR模型。对于风险组分层，常规的放射线学签名和DLR签名使内部和外部队列中的高风险患者群体之间有显着差异，而外部队列中的临床特征则失败。结论：我们的研究确定了高级NPC中生存预测的潜在预后工具，表明DLR可以为当前TNM分期提供互补值。

Video super-resolution is one of the most popular tasks on mobile devices, being widely used for an automatic improvement of low-bitrate and low-resolution video streams. While numerous solutions have been proposed for this problem, they are usually quite computationally demanding, demonstrating low FPS rates and power efficiency on mobile devices. In this Mobile AI challenge, we address this problem and propose the participants to design an end-to-end real-time video super-resolution solution for mobile NPUs optimized for low energy consumption. The participants were provided with the REDS training dataset containing video sequences for a 4X video upscaling task. The runtime and power efficiency of all models was evaluated on the powerful MediaTek Dimensity 9000 platform with a dedicated AI processing unit capable of accelerating floating-point and quantized neural networks. All proposed solutions are fully compatible with the above NPU, demonstrating an up to 500 FPS rate and 0.2 [Watt / 30 FPS] power consumption. A detailed description of all models developed in the challenge is provided in this paper.

人类对象相互作用（HOI）检测是高级图像理解的核心任务。最近，由于其出色的性能和有效的结构，检测变压器（DETR）基于HOI的检测器已变得流行。但是，这些方法通常对所有测试图像采用固定的HOI查询，这很容易受到一个特定图像中对象的位置变化的影响。因此，在本文中，我们建议通过挖掘硬阳性查询来增强DETR的鲁棒性，这些查询被迫使用部分视觉提示做出正确的预测。首先，我们根据每个训练图像标记的人类对象对的地面真相（GT）位置明确地组成硬阳性查询。具体而言，我们将每个标记的人类对象对的GT边界框移动，以使移位框仅覆盖GT的一定部分。我们将每个标记的人类对象对的移位框的坐标编码为HOI查询。其次，我们通过在解码器层的交叉注意地图中掩盖了最高分数，从而隐式构建了另一组硬阳性查询。然后，掩盖的注意图仅涵盖HOI预测的部分重要提示。最后，提出了一种替代策略，该策略有效地结合了两种类型的硬性查询。在每次迭代中，都采用了Detr的可学习查询和一种选择的硬阳性查询进行损失计算。实验结果表明，我们提出的方法可以广泛应用于现有的基于DITR的HOI探测器。此外，我们始终在三个基准上实现最先进的性能：HICO-DET，V-COCO和HOI-A。代码可在https://github.com/muchhair/hqm上找到。

传统的3D人姿态估计依赖于首次检测2D身体键盘，然后求解2D到3D对应问题。提高有希望的结果，该学习范例高度依赖于2D关键点检测器的质量，这不可避免地易于闭塞和堵塞-of-image缺席。在本文中，我们提出了一种新颖的姿势定向网（PONET），其能够仅通过学习方向估计3D姿势，因此在没有图像证据的情况下绕过错误易于keypoint检测器。对于具有部分不可见的四肢的图像，Ponet通过利用本地图像证据来恢复3D姿势来估计这些肢体的3D方向。通过利用完全看不见的四肢来说，Ponet甚至可以从完全看不见的四肢的图像中推断出完整的3D姿势。可见肢体之间的取向相关性以补充估计的姿势，进一步提高了3D姿态估计的鲁棒性。我们在多个数据集中评估我们的方法，包括Human3.6M，MPII，MPI-INF-3DHP和3DPW。我们的方法在理想设置中实现了与最先进的技术的结果，但显着消除了对关键点检测器和相应的计算负担的依赖性。在截断和擦除等方面的高度挑战性方案中，我们的方法稳健地表现得非常强大，与本领域的状态相比，展示其对现实世界应用的可能性。

近年来，大规模的深层模型取得了巨大的成功，但巨大的计算复杂性和大规模的存储要求使其在资源限制设备中部署它们是一个巨大的挑战。作为模型压缩和加速度方法，知识蒸馏通过从教师探测器转移黑暗知识有效提高了小型模型的性能。然而，大多数基于蒸馏的检测方法主要模仿近边界盒附近的特征，这遭受了两个限制。首先，它们忽略边界盒外面的有益特征。其次，这些方法模仿一些特征，这些特征被教师探测器被错误地被视为背景。为了解决上述问题，我们提出了一种新颖的特征性 - 丰富的评分（FRS）方法，可以选择改善蒸馏过程中的广义可检测性的重要特征。所提出的方法有效地检索边界盒外面的重要特征，并消除边界盒内的有害特征。广泛的实验表明，我们的方法在基于锚和无锚探测器上实现了出色的性能。例如，具有Reset-50的RetinAnet在Coco2017数据集上达到39.7％，甚至超过基于Reset-101的教师检测器38.9％甚至超过0.8％。

The development of social media user stance detection and bot detection methods rely heavily on large-scale and high-quality benchmarks. However, in addition to low annotation quality, existing benchmarks generally have incomplete user relationships, suppressing graph-based account detection research. To address these issues, we propose a Multi-Relational Graph-Based Twitter Account Detection Benchmark (MGTAB), the first standardized graph-based benchmark for account detection. To our knowledge, MGTAB was built based on the largest original data in the field, with over 1.55 million users and 130 million tweets. MGTAB contains 10,199 expert-annotated users and 7 types of relationships, ensuring high-quality annotation and diversified relations. In MGTAB, we extracted the 20 user property features with the greatest information gain and user tweet features as the user features. In addition, we performed a thorough evaluation of MGTAB and other public datasets. Our experiments found that graph-based approaches are generally more effective than feature-based approaches and perform better when introducing multiple relations. By analyzing experiment results, we identify effective approaches for account detection and provide potential future research directions in this field. Our benchmark and standardized evaluation procedures are freely available at: https://github.com/GraphDetec/MGTAB.

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.

Dynamic treatment regimes assign personalized treatments to patients sequentially over time based on their baseline information and time-varying covariates. In mobile health applications, these covariates are typically collected at different frequencies over a long time horizon. In this paper, we propose a deep spectral Q-learning algorithm, which integrates principal component analysis (PCA) with deep Q-learning to handle the mixed frequency data. In theory, we prove that the mean return under the estimated optimal policy converges to that under the optimal one and establish its rate of convergence. The usefulness of our proposal is further illustrated via simulations and an application to a diabetes dataset.

Temporal sentence grounding (TSG) aims to identify the temporal boundary of a specific segment from an untrimmed video by a sentence query. All existing works first utilize a sparse sampling strategy to extract a fixed number of video frames and then conduct multi-modal interactions with query sentence for reasoning. However, we argue that these methods have overlooked two indispensable issues: 1) Boundary-bias: The annotated target segment generally refers to two specific frames as corresponding start and end timestamps. The video downsampling process may lose these two frames and take the adjacent irrelevant frames as new boundaries. 2) Reasoning-bias: Such incorrect new boundary frames also lead to the reasoning bias during frame-query interaction, reducing the generalization ability of model. To alleviate above limitations, in this paper, we propose a novel Siamese Sampling and Reasoning Network (SSRN) for TSG, which introduces a siamese sampling mechanism to generate additional contextual frames to enrich and refine the new boundaries. Specifically, a reasoning strategy is developed to learn the inter-relationship among these frames and generate soft labels on boundaries for more accurate frame-query reasoning. Such mechanism is also able to supplement the absent consecutive visual semantics to the sampled sparse frames for fine-grained activity understanding. Extensive experiments demonstrate the effectiveness of SSRN on three challenging datasets.