我们考虑了自主渠道访问（AutoCA）的问题，其中一组终端试图以分布式方式通过常见的无线通道发现具有访问点（AP）的通信策略。由于拓扑不规则和终端的通信范围有限，因此对AutoCA的实用挑战是隐藏的终端问题，在无线网络中臭名昭著，可以使吞吐量和延迟性能恶化。为了应对挑战，本文提出了一种新的多代理深钢筋学习范式，该学习范式被称为Madrl-HT，在存在隐藏码头的情况下为Autoca量身定制。 MADRL-HT利用拓扑见解，并将每个终端的观察空间转变为独立于终端数量的可扩展形式。为了补偿部分可观察性，我们提出了一种外观机制，以便终端可以从载体感知的通道状态以及AP的反馈中推断出其隐藏终端的行为。提出了基于窗口的全球奖励功能，从而指示终端在学习过程中平衡终端的传输机会，以最大程度地提高系统吞吐量。广泛的数值实验验证了我们的解决方案基准测试的优越性能，并通过避免碰撞（CSMA/CA）方案对旧的载体 - 义值访问。

在数字组织病理学分析中，污渍变化通常会降低基于深度学习的方法的概括能力。两项单独的建议，即染色标准化（SN）和染色增强（SA），已聚焦以减少概括错误，在此，前者使用模板图像减轻了不同医疗中心的污渍转移，后者则丰富了后者的污渍样式，并通过污染中心的误差。模拟更多的污渍变化。但是，它们的应用是由选择模板图像和不现实样式的构建的界定。为了解决这些问题，我们将SN和SA与新颖的Randstainna方案统一，该方案在可行的范围内限制了可变污渍样式，以训练污渍不可知论的深度学习模型。 Randstainna适用于在颜色空间集合中染色归一化，即HED，HSV，实验室。此外，我们提出了一个随机的颜色空间选择方案，以提高性能。我们通过两个诊断任务，即具有各种网络骨架的诊断任务，即组织亚型分类和核分割。拟议的Randstainna可以始终如一地提高概括能力，使我们的模型可以应对具有不可预测的污渍样式的更传入的临床数据集，因此所提出的Randstainna的性能优势可以始终如一地提高概括能力。这些代码可从https://github.com/yiqings/randstainna获得。

基于图的异常检测（GAD）由于图表的强大表示能力以及图形采矿技术的最新进展而变得普遍。然而，这些GAD工具暴露了新的攻击表面，讽刺地是由于能够利用数据之间的关系的独特优势。也就是说，攻击者现在可以操纵那些关系（即图形的结构），以允许一些目标节点逃避检测。在本文中，我们通过将新型的针对性结构中毒攻击设计到奇怪的基于代表回归的GAD系统来利用这种脆弱性。特别是，我们为奇怪的攻击制定了奇怪的攻击，作为双级优化问题，在那里关键的技术挑战是有效地解决离散域中的问题。我们提出了一种基于梯度下降的新型攻击方法称为二进制层。与现有技术相比，BinarizedAttack可以更好地使用梯度信息，使其特别适用于解决组合优化问题。此外，我们通过采用它来攻击其他基于代表学习的GAD系统来调查BinarizedAtch的攻击可转换性。我们的综合实验表明，BinarizedAttack非常有效地使目标节点能够避免基于图形的异常检测工具与有限的攻击者的预算，并且在黑箱转移攻击设置中，BinarizedAtck也有效地测试，特别是可以显着改变GAD系统学习的节点嵌入式。因此，我们的研究开辟了学习新型攻击的门，以依靠图形数据的安全分析工具。

Weakly-supervised object localization aims to indicate the category as well as the scope of an object in an image given only the image-level labels. Most of the existing works are based on Class Activation Mapping (CAM) and endeavor to enlarge the discriminative area inside the activation map to perceive the whole object, yet ignore the co-occurrence confounder of the object and context (e.g., fish and water), which makes the model inspection hard to distinguish object boundaries. Besides, the use of CAM also brings a dilemma problem that the classification and localization always suffer from a performance gap and can not reach their highest accuracy simultaneously. In this paper, we propose a casual knowledge distillation method, dubbed KD-CI-CAM, to address these two under-explored issues in one go. More specifically, we tackle the co-occurrence context confounder problem via causal intervention (CI), which explores the causalities among image features, contexts, and categories to eliminate the biased object-context entanglement in the class activation maps. Based on the de-biased object feature, we additionally propose a multi-teacher causal distillation framework to balance the absorption of classification knowledge and localization knowledge during model training. Extensive experiments on several benchmarks demonstrate the effectiveness of KD-CI-CAM in learning clear object boundaries from confounding contexts and addressing the dilemma problem between classification and localization performance.

In this paper, a semantic communication framework for image transmission is developed. In the investigated framework, a set of servers cooperatively transmit images to a set of users utilizing semantic communication techniques. To evaluate the performance of studied semantic communication system, a multimodal metric is proposed to measure the correlation between the extracted semantic information and the original image. To meet the ISS requirement of each user, each server must jointly determine the semantic information to be transmitted and the resource blocks (RBs) used for semantic information transmission. We formulate this problem as an optimization problem aiming to minimize each server's transmission latency while reaching the ISS requirement. To solve this problem, a value decomposition based entropy-maximized multi-agent reinforcement learning (RL) is proposed, which enables servers to coordinate for training and execute RB allocation in a distributed manner to approach to a globally optimal performance with less training iterations. Compared to traditional multi-agent RL, the proposed RL improves the valuable action exploration of servers and the probability of finding a globally optimal RB allocation policy based on local observation. Simulation results show that the proposed algorithm can reduce the transmission delay by up to 16.1% compared to traditional multi-agent RL.

New architecture GPUs like A100 are now equipped with multi-instance GPU (MIG) technology, which allows the GPU to be partitioned into multiple small, isolated instances. This technology provides more flexibility for users to support both deep learning training and inference workloads, but efficiently utilizing it can still be challenging. The vision of this paper is to provide a more comprehensive and practical benchmark study for MIG in order to eliminate the need for tedious manual benchmarking and tuning efforts. To achieve this vision, the paper presents MIGPerf, an open-source tool that streamlines the benchmark study for MIG. Using MIGPerf, the authors conduct a series of experiments, including deep learning training and inference characterization on MIG, GPU sharing characterization, and framework compatibility with MIG. The results of these experiments provide new insights and guidance for users to effectively employ MIG, and lay the foundation for further research on the orchestration of hybrid training and inference workloads on MIGs. The code and results are released on https://github.com/MLSysOps/MIGProfiler. This work is still in progress and more results will be published soon.

With the development of technology and sharing economy, Airbnb as a famous short-term rental platform, has become the first choice for many young people to select. The issue of Airbnb's pricing has always been a problem worth studying. While the previous studies achieve promising results, there are exists deficiencies to solve. Such as, (1) the feature attributes of rental are not rich enough; (2) the research on rental text information is not deep enough; (3) there are few studies on predicting the rental price combined with the point of interest(POI) around the house. To address the above challenges, we proposes a multi-source information embedding(MSIE) model to predict the rental price of Airbnb. Specifically, we first selects the statistical feature to embed the original rental data. Secondly, we generates the word feature vector and emotional score combination of three different text information to form the text feature embedding. Thirdly, we uses the points of interest(POI) around the rental house information generates a variety of spatial network graphs, and learns the embedding of the network to obtain the spatial feature embedding. Finally, this paper combines the three modules into multi source rental representations, and uses the constructed fully connected neural network to predict the price. The analysis of the experimental results shows the effectiveness of our proposed model.

Domain adaptive detection aims to improve the generalization of detectors on target domain. To reduce discrepancy in feature distributions between two domains, recent approaches achieve domain adaption through feature alignment in different granularities via adversarial learning. However, they neglect the relationship between multiple granularities and different features in alignment, degrading detection. Addressing this, we introduce a unified multi-granularity alignment (MGA)-based detection framework for domain-invariant feature learning. The key is to encode the dependencies across different granularities including pixel-, instance-, and category-levels simultaneously to align two domains. Specifically, based on pixel-level features, we first develop an omni-scale gated fusion (OSGF) module to aggregate discriminative representations of instances with scale-aware convolutions, leading to robust multi-scale detection. Besides, we introduce multi-granularity discriminators to identify where, either source or target domains, different granularities of samples come from. Note that, MGA not only leverages instance discriminability in different categories but also exploits category consistency between two domains for detection. Furthermore, we present an adaptive exponential moving average (AEMA) strategy that explores model assessments for model update to improve pseudo labels and alleviate local misalignment problem, boosting detection robustness. Extensive experiments on multiple domain adaption scenarios validate the superiority of MGA over other approaches on FCOS and Faster R-CNN detectors. Code will be released at https://github.com/tiankongzhang/MGA.

Although deep learning has made remarkable progress in processing various types of data such as images, text and speech, they are known to be susceptible to adversarial perturbations: perturbations specifically designed and added to the input to make the target model produce erroneous output. Most of the existing studies on generating adversarial perturbations attempt to perturb the entire input indiscriminately. In this paper, we propose ExploreADV, a general and flexible adversarial attack system that is capable of modeling regional and imperceptible attacks, allowing users to explore various kinds of adversarial examples as needed. We adapt and combine two existing boundary attack methods, DeepFool and Brendel\&Bethge Attack, and propose a mask-constrained adversarial attack system, which generates minimal adversarial perturbations under the pixel-level constraints, namely ``mask-constraints''. We study different ways of generating such mask-constraints considering the variance and importance of the input features, and show that our adversarial attack system offers users good flexibility to focus on sub-regions of inputs, explore imperceptible perturbations and understand the vulnerability of pixels/regions to adversarial attacks. We demonstrate our system to be effective based on extensive experiments and user study.

Depression is a leading cause of death worldwide, and the diagnosis of depression is nontrivial. Multimodal learning is a popular solution for automatic diagnosis of depression, and the existing works suffer two main drawbacks: 1) the high-order interactions between different modalities can not be well exploited; and 2) interpretability of the models are weak. To remedy these drawbacks, we propose a multimodal multi-order factor fusion (MMFF) method. Our method can well exploit the high-order interactions between different modalities by extracting and assembling modality factors under the guide of a shared latent proxy. We conduct extensive experiments on two recent and popular datasets, E-DAIC-WOZ and CMDC, and the results show that our method achieve significantly better performance compared with other existing approaches. Besides, by analyzing the process of factor assembly, our model can intuitively show the contribution of each factor. This helps us understand the fusion mechanism.