在本文中,我们开发了一个模块化框架,用于将强化学习应用于最佳贸易执行问题。该框架的设计考虑了灵活性,以便简化不同的仿真设置的实现。我们不关注代理和优化方法,而是专注于环境,并分解必要的要求,以模拟在强化学习框架下的最佳贸易执行,例如数据预处理,观察结果的构建,行动处理,儿童订单执行,模拟,模拟我们给出了每个组件的示例,探索他们的各个实现\&它们之间的相互作用所带来的困难,并讨论每个组件在模拟中引起的不同现象,并突出了模拟与行为之间的分歧,并讨论了不同的现象。真正的市场。我们通过设置展示我们的模块化实施,该设置是按照时间加权的平均价格(TWAP)提交时间表,允许代理人专门放置限制订单,并通过迭代的迭代来模拟限制订单(LOB)(LOB)和根据相同的时间表,将奖励计算为TWAP基准算法所达到的价格的\ $改进。我们还制定了评估程序,以在培训视野的间隔内纳入给定代理的迭代重新训练和评估,并模仿代理在随着新市场数据的可用而连续再培训时的行为,并模拟算法提供者是限制的监测实践在当前的监管框架下执行。
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Advances in computer vision and machine learning techniques have led to significant development in 2D and 3D human pose estimation from RGB cameras, LiDAR, and radars. However, human pose estimation from images is adversely affected by occlusion and lighting, which are common in many scenarios of interest. Radar and LiDAR technologies, on the other hand, need specialized hardware that is expensive and power-intensive. Furthermore, placing these sensors in non-public areas raises significant privacy concerns. To address these limitations, recent research has explored the use of WiFi antennas (1D sensors) for body segmentation and key-point body detection. This paper further expands on the use of the WiFi signal in combination with deep learning architectures, commonly used in computer vision, to estimate dense human pose correspondence. We developed a deep neural network that maps the phase and amplitude of WiFi signals to UV coordinates within 24 human regions. The results of the study reveal that our model can estimate the dense pose of multiple subjects, with comparable performance to image-based approaches, by utilizing WiFi signals as the only input. This paves the way for low-cost, broadly accessible, and privacy-preserving algorithms for human sensing.
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Diffusion models have achieved unprecedented performance in generative modeling. The commonly-adopted formulation of the latent code of diffusion models is a sequence of gradually denoised samples, as opposed to the simpler (e.g., Gaussian) latent space of GANs, VAEs, and normalizing flows. This paper provides an alternative, Gaussian formulation of the latent space of various diffusion models, as well as an invertible DPM-Encoder that maps images into the latent space. While our formulation is purely based on the definition of diffusion models, we demonstrate several intriguing consequences. (1) Empirically, we observe that a common latent space emerges from two diffusion models trained independently on related domains. In light of this finding, we propose CycleDiffusion, which uses DPM-Encoder for unpaired image-to-image translation. Furthermore, applying CycleDiffusion to text-to-image diffusion models, we show that large-scale text-to-image diffusion models can be used as zero-shot image-to-image editors. (2) One can guide pre-trained diffusion models and GANs by controlling the latent codes in a unified, plug-and-play formulation based on energy-based models. Using the CLIP model and a face recognition model as guidance, we demonstrate that diffusion models have better coverage of low-density sub-populations and individuals than GANs. The code is publicly available at https://github.com/ChenWu98/cycle-diffusion.
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生成模型(例如gan和扩散模型)以无监督的方式学习潜在的数据分布。但是,许多感兴趣的应用都需要从生成模型的输出空间的特定区域或在一系列特征范围内进行采样。为了允许在这些情况下进行有效的采样,我们提出了生成视觉提示(提示),这是一个通过合并任意现成模型的知识来对预训练的生成模型进行分配控制的框架。 Prestgen将控制定义为基于能量的模型(EBM),并通过使用可逆的神经网络近似EBM来以馈送方式进行示例图像,从而避免了推理时的优化。我们演示了提示如何使用各种出现的模型来控制多种生成模型(例如,stylegan2,stylenerf,styLenerf,bixfusion autocoder和nvae):(1)使用剪辑模型,提示可以通过文本引导的示例图像,(2)使用图像分类器,提示器可以在一组属性上脱离偏差的生成模型,并且(3)使用反图形模型,提示器可以在不同姿势中示例相同身份的图像。 (4)最后,Prestgen揭示了剪辑模型在用作控制时显示“报告偏差”,并且提示器可以以迭代方式进一步偏离此受控分布。我们的代码可在https://github.com/chenwu98/generative-visual-prompt上找到。
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3D面部建模一直是计算机视觉和计算机图形学研究的活跃领域,从虚拟化身中的面部表达转移到合成数据生成,助长了应用。现有的3D深度学习生成模型(例如,VAE,gan)允许生成紧凑的面部表征(形状和纹理),可以在形状和外观空间中建模非线性(例如,散射效果,镜面等)。但是,他们缺乏控制微妙表达产生的能力。本文提出了一种新的3D面部生成模型,该模型可以使身份和表达不适,并提供对表达式的颗粒状控制。特别是,我们建议使用一对监督自动编码器和生成对抗网络来产生高质量的3D面,无论是外观和形状而言。实验结果是用整体表达标签或作用单元标签学到的3D面的产生结果表明,我们如何将身份和表达分离;在保留身份的同时,获得精细的表达方式。
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语言模型既展示了定量的改进,又展示了新的定性功能,随着规模的增加。尽管它们具有潜在的变革性影响,但这些新能力的特征却很差。为了为未来的研究提供信息,为破坏性的新模型能力做准备,并改善社会有害的效果,至关重要的是,我们必须了解目前和近乎未来的能力和语言模型的局限性。为了应对这一挑战,我们介绍了超越模仿游戏基准(Big Bench)。 Big Bench目前由204个任务组成,由132家机构的442位作者贡献。任务主题是多样的,从语言学,儿童发展,数学,常识性推理,生物学,物理学,社会偏见,软件开发等等。 Big-Bench专注于被认为超出当前语言模型的功能的任务。我们评估了OpenAI的GPT型号,Google内部密集变压器体系结构和大型基础上的开关稀疏变压器的行为,跨越了数百万到数十亿个参数。此外,一个人类专家评估者团队执行了所有任务,以提供强大的基准。研究结果包括:模型性能和校准都随规模改善,但绝对的术语(以及与评估者的性能相比);在模型类中的性能非常相似,尽管带有稀疏性。逐渐和预测的任务通常涉及大量知识或记忆成分,而在临界规模上表现出“突破性”行为的任务通常涉及多个步骤或组成部分或脆性指标;社交偏见通常会随着含糊不清的环境而随着规模而增加,但这可以通过提示来改善。
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自动语音识别(ASR)是一个复杂和具有挑战性的任务。近年来,该地区出现了重大进展。特别是对于巴西葡萄牙语(BP)语言,在2020年的下半年,有大约376小时的公众可供ASR任务。在2021年初发布新数据集,这个数字增加到574小时。但是,现有资源由仅包含读取和准备的演讲的Audios组成。缺少数据集包括自发性语音,这在不同的ASR应用中是必不可少的。本文介绍了Coraa(注释Audios语料库)V1。使用290.77小时,在包含验证对(音频转录)的BP中ASR的公共可用数据集。科拉还含有欧洲葡萄牙音像(4.69小时)。我们还提供了一个基于Wav2VEC 2.0 XLSR-53的公共ASR模型,并通过CoraA进行微调。我们的模型在CoraA测试集中实现了24.18%的单词误差率,并且在常见的语音测试集上为20.08%。测量字符错误率时,我们分别获得11.02%和6.34%,分别为CoraA和常见声音。 Coraa Corpora在自发言论中与BP中的改进ASR模型进行了组装,并激励年轻研究人员开始研究葡萄牙语的ASR。所有Corpora都在CC By-NC-ND 4.0许可证下公开提供Https://github.com/nilc-nlp/coraa。
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Since a lexicon-based approach is more elegant scientifically, explaining the solution components and being easier to generalize to other applications, this paper provides a new approach for offensive language and hate speech detection on social media. Our approach embodies a lexicon of implicit and explicit offensive and swearing expressions annotated with contextual information. Due to the severity of the social media abusive comments in Brazil, and the lack of research in Portuguese, Brazilian Portuguese is the language used to validate the models. Nevertheless, our method may be applied to any other language. The conducted experiments show the effectiveness of the proposed approach, outperforming the current baseline methods for the Portuguese language.
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社会存在,与真实的人在一起的感觉,将推动由数字人类在虚拟现实(VR)中驱动的下一代通信系统。最佳的3D视频VR化身最小化不可思议的效果取决于特定于人的模型。但是,这些PS模型既耗时又耗时,并且通常受到数据可变性有限的训练,从而导致概括和稳健性差。影响面部表达转移算法准确性的主要变异性包括使用不同的VR耳机(例如,摄像头配置,耳机的斜率),面部外观随时间变化(例如,胡须,化妆)和环境因素(例如, ,照明,背景)。这是VR中这些模型可扩展性的主要缺点。本文通过提出了通过专门的增强策略培训的端到端多个认同体系结构(MIA)来克服这些局限性的进展。 MIA使用最小的个性化信息(即中性的3D网格形状),从VR耳机中的三个相机(两只眼睛,一只嘴)从三个相机(两只眼睛,一只嘴)驱动了头像的形状。同样,如果可用PS纹理解码器,MIA能够在具有挑战性的情况下驱动完整的Avatar(Shape+Texture)强劲的PS模型。我们对改善鲁棒性和概括的关键贡献是,我们的方法以无监督的方式隐含地将面部表达与滋扰因素(例如耳机,环境,面部外观)脱离。我们在各种实验中证明了所提出的方法与最先进的PS方法的卓越性能和鲁棒性。
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Due to the severity of the social media offensive and hateful comments in Brazil, and the lack of research in Portuguese, this paper provides the first large-scale expert annotated corpus of Brazilian Instagram comments for hate speech and offensive language detection. The HateBR corpus was collected from the comment section of Brazilian politicians' accounts on Instagram and manually annotated by specialists, reaching a high inter-annotator agreement. The corpus consists of 7,000 documents annotated according to three different layers: a binary classification (offensive versus non-offensive comments), offensiveness-level classification (highly, moderately, and slightly offensive), and nine hate speech groups (xenophobia, racism, homophobia, sexism, religious intolerance, partyism, apology for the dictatorship, antisemitism, and fatphobia). We also implemented baseline experiments for offensive language and hate speech detection and compared them with a literature baseline. Results show that the baseline experiments on our corpus outperform the current state-of-the-art for the Portuguese language.
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