In a spoofing attack, an attacker impersonates a legitimate user to access or tamper with data intended for or produced by the legitimate user. In wireless communication systems, these attacks may be detected by relying on features of the channel and transmitter radios. In this context, a popular approach is to exploit the dependence of the received signal strength (RSS) at multiple receivers or access points with respect to the spatial location of the transmitter. Existing schemes rely on long-term estimates, which makes it difficult to distinguish spoofing from movement of a legitimate user. This limitation is here addressed by means of a deep neural network that implicitly learns the distribution of pairs of short-term RSS vector estimates. The adopted network architecture imposes the invariance to permutations of the input (commutativity) that the decision problem exhibits. The merits of the proposed algorithm are corroborated on a data set that we collected.

彼此接触的任何两个物体都会仅仅是由于重力或机械接触而引起的力，例如机器人手臂抓住一个物体，甚至是我们膝关节处的两个骨头之间的接触。自然测量和监视这些接触力的能力允许从仓库管理（基于重量检测错误包装）到机器人技术（使机器人臂的抓地力与人类皮肤一样敏感）和医疗保健（膝关节植入物）的大量应用。设计一个无处不在的力传感器是充满挑战的，该传感器可自然地用于所有这些应用。首先，传感器应足够小，以适合狭窄的空间。接下来，我们不想铺设笨重的电缆来读取传感器的力值。最后，我们需要进行无电池设计以满足体内应用程序。我们开发了WiforCesticker，这是一种无线，无电池，类似贴纸的力传感器，可以在任何表面上都可以无处不在，例如所有仓库包装，机器人手臂和膝关节。 WiforCesticker首先设计一个$ 4 $ 〜mm〜 $ \ $ \ times $〜$〜$ 2 $ 〜mm〜 $ \ $ \ times $〜$〜$〜$ 0.4 $〜毫米电容传感器设计，配备了$ 10 $〜$〜$〜$〜$〜$〜$〜$ 〜mm〜mm 〜mm 〜mm 〜mm在灵活的PCB基材上设计。其次，它引入了一种新的机制，可以通过将传感器与COTS RFID系统插入传感器，从而无线读取器无线读取器可以通过无线读取器读取力信息。该传感器可以在多个测试环境中检测到$ 0 $ -6 $ 〜n的力量，感应精度为$ <0.5 $ 〜n，并在传感器上使用超过10,000美元的$ 10,000 $变化的力级按下。我们还通过设计传感器展示了两个应用程序案例研究，称量仓库包和骨接头施加的传感力。

对自主导航和室内应用程序勘探机器人的最新兴趣刺激了对室内同时定位和映射（SLAM）机器人系统的研究。尽管大多数这些大满贯系统使用视觉和激光雷达传感器与探针传感器同时使用，但这些探针传感器会随着时间的流逝而漂移。为了打击这种漂移，视觉大满贯系统部署计算和内存密集型搜索算法来检测“环闭合”，这使得轨迹估计在全球范围内保持一致。为了绕过这些资源（计算和内存）密集算法，我们提出了VIWID，该算法将WiFi和视觉传感器集成在双层系统中。这种双层方法将局部和全局轨迹估计的任务分开，从而使VIWID资源有效，同时实现PAR或更好的性能到最先进的视觉大满贯。我们在四个数据集上展示了VIWID的性能，涵盖了超过1500 m的遍历路径，并分别显示出4.3倍和4倍的计算和记忆消耗量与最先进的视觉和LIDAR SLAM SLAM系统相比，具有PAR SLAM性能。

在过去的几年中，自动驾驶的感知系统在其表现方面取得了重大进步。但是，这些系统在极端天气条件下努力表现出稳健性，因为在这些条件下，传感器和相机等传感器套件中的主要传感器都会下降。为了解决此问题，摄像机雷达融合系统为所有可靠的高质量感知提供了独特的机会。相机提供丰富的语义信息，而雷达可以通过遮挡和在所有天气条件下工作。在这项工作中，我们表明，当摄像机输入降解时，最新的融合方法的性能很差，这实际上导致失去了他们设定的全天可靠性。与这些方法相反，我们提出了一种新方法RadSegnet，该方法使用了独立信息提取的新设计理念，并在所有情况下都可以在所有情况下真正实现可靠性，包括遮挡和不利天气。我们在基准ASTYX数据集上开发并验证了我们的系统，并在辐射数据集上进一步验证了这些结果。与最先进的方法相比，Radsegnet在ASTYX上提高了27％，辐射增长了41.46％，平均精度得分，并且在不利天气条件下的性能明显更好

Supervised Question Answering systems (QA systems) rely on domain-specific human-labeled data for training. Unsupervised QA systems generate their own question-answer training pairs, typically using secondary knowledge sources to achieve this outcome. Our approach (called PIE-QG) uses Open Information Extraction (OpenIE) to generate synthetic training questions from paraphrased passages and uses the question-answer pairs as training data for a language model for a state-of-the-art QA system based on BERT. Triples in the form of <subject, predicate, object> are extracted from each passage, and questions are formed with subjects (or objects) and predicates while objects (or subjects) are considered as answers. Experimenting on five extractive QA datasets demonstrates that our technique achieves on-par performance with existing state-of-the-art QA systems with the benefit of being trained on an order of magnitude fewer documents and without any recourse to external reference data sources.

Physical interactions can often help reveal information that is not readily apparent. For example, we may tug at a table leg to evaluate whether it is built well, or turn a water bottle upside down to check that it is watertight. We propose to train robots to acquire such interactive behaviors automatically, for the purpose of evaluating the result of an attempted robotic skill execution. These evaluations in turn serve as "interactive reward functions" (IRFs) for training reinforcement learning policies to perform the target skill, such as screwing the table leg tightly. In addition, even after task policies are fully trained, IRFs can serve as verification mechanisms that improve online task execution. For any given task, our IRFs can be conveniently trained using only examples of successful outcomes, and no further specification is needed to train the task policy thereafter. In our evaluations on door locking and weighted block stacking in simulation, and screw tightening on a real robot, IRFs enable large performance improvements, even outperforming baselines with access to demonstrations or carefully engineered rewards. Project website: https://sites.google.com/view/lirf-corl-2022/

We present a novel approach to improve the performance of learning-based speech dereverberation using accurate synthetic datasets. Our approach is designed to recover the reverb-free signal from a reverberant speech signal. We show that accurately simulating the low-frequency components of Room Impulse Responses (RIRs) is important to achieving good dereverberation. We use the GWA dataset that consists of synthetic RIRs generated in a hybrid fashion: an accurate wave-based solver is used to simulate the lower frequencies and geometric ray tracing methods simulate the higher frequencies. We demonstrate that speech dereverberation models trained on hybrid synthetic RIRs outperform models trained on RIRs generated by prior geometric ray tracing methods on four real-world RIR datasets.

Named Entity Recognition (NER) involves the identification and classification of named entities in unstructured text into predefined classes. NER in languages with limited resources, like French, is still an open problem due to the lack of large, robust, labelled datasets. In this paper, we propose a transformer-based NER approach for French using adversarial adaptation to similar domain or general corpora for improved feature extraction and better generalization. We evaluate our approach on three labelled datasets and show that our adaptation framework outperforms the corresponding non-adaptive models for various combinations of transformer models, source datasets and target corpora.

Social networking sites, blogs, and online articles are instant sources of news for internet users globally. However, in the absence of strict regulations mandating the genuineness of every text on social media, it is probable that some of these texts are fake news or rumours. Their deceptive nature and ability to propagate instantly can have an adverse effect on society. This necessitates the need for more effective detection of fake news and rumours on the web. In this work, we annotate four fake news detection and rumour detection datasets with their emotion class labels using transfer learning. We show the correlation between the legitimacy of a text with its intrinsic emotion for fake news and rumour detection, and prove that even within the same emotion class, fake and real news are often represented differently, which can be used for improved feature extraction. Based on this, we propose a multi-task framework for fake news and rumour detection, predicting both the emotion and legitimacy of the text. We train a variety of deep learning models in single-task and multi-task settings for a more comprehensive comparison. We further analyze the performance of our multi-task approach for fake news detection in cross-domain settings to verify its efficacy for better generalization across datasets, and to verify that emotions act as a domain-independent feature. Experimental results verify that our multi-task models consistently outperform their single-task counterparts in terms of accuracy, precision, recall, and F1 score, both for in-domain and cross-domain settings. We also qualitatively analyze the difference in performance in single-task and multi-task learning models.

We propose to characterize and improve the performance of blind room impulse response (RIR) estimation systems in the context of a downstream application scenario, far-field automatic speech recognition (ASR). We first draw the connection between improved RIR estimation and improved ASR performance, as a means of evaluating neural RIR estimators. We then propose a GAN-based architecture that encodes RIR features from reverberant speech and constructs an RIR from the encoded features, and uses a novel energy decay relief loss to optimize for capturing energy-based properties of the input reverberant speech. We show that our model outperforms the state-of-the-art baselines on acoustic benchmarks (by 72% on the energy decay relief and 22% on an early-reflection energy metric), as well as in an ASR evaluation task (by 6.9% in word error rate).