Videos shot by laymen using hand-held cameras contain undesirable shaky motion. Estimating the global motion between successive frames, in a manner not influenced by moving objects, is central to many video stabilization techniques, but poses significant challenges. A large body of work uses 2D affine transformations or homography for the global motion. However, in this work, we introduce a more general representation scheme, which adapts any existing optical flow network to ignore the moving objects and obtain a spatially smooth approximation of the global motion between video frames. We achieve this by a knowledge distillation approach, where we first introduce a low pass filter module into the optical flow network to constrain the predicted optical flow to be spatially smooth. This becomes our student network, named as \textsc{GlobalFlowNet}. Then, using the original optical flow network as the teacher network, we train the student network using a robust loss function. Given a trained \textsc{GlobalFlowNet}, we stabilize videos using a two stage process. In the first stage, we correct the instability in affine parameters using a quadratic programming approach constrained by a user-specified cropping limit to control loss of field of view. In the second stage, we stabilize the video further by smoothing global motion parameters, expressed using a small number of discrete cosine transform coefficients. In extensive experiments on a variety of different videos, our technique outperforms state of the art techniques in terms of subjective quality and different quantitative measures of video stability. The source code is publicly available at \href{https://github.com/GlobalFlowNet/GlobalFlowNet}{https://github.com/GlobalFlowNet/GlobalFlowNet}

预测经济的短期动态 - 对经济代理商决策过程的重要意见 - 经常在线性模型中使用滞后指标。这通常在正常时期就足够了，但在危机期间可能不足。本文旨在证明，在非线性机器学习方法的帮助下，非传统和及时的数据（例如零售和批发付款）可以为决策者提供复杂的模型，以准确地估算几乎实时的关键宏观经济指标。此外，我们提供了一组计量经济学工具，以减轻机器学习模型中的过度拟合和解释性挑战，以提高其政策使用的有效性。我们的模型具有付款数据，非线性方法和量身定制的交叉验证方法，有助于提高宏观经济的启示准确性高达40 \％ - 在COVID-19期间的增长较高。我们观察到，付款数据对经济预测的贡献很小，在低和正常增长期间是线性的。但是，在强年或正增长期间，付款数据的贡献很大，不对称和非线性。

在这项工作中，我们专注于从自然语言问题中生成SPARQL查询的任务，然后可以在知识图（kgs）上执行。我们假设已经提供了黄金实体和关系，其余的任务是与Sparql词汇一起以正确的顺序排列它们，并输入令牌以产生正确的SPARQL查询。到目前为止，尚未对此任务进行深入探索，因此我们使用BERT嵌入的BART，T5和PGN（指针发电机网络）进行了深入探讨，因此，请在PLM ERA中寻找此任务的新基础，在dbpedia和wikidata kgs上。我们表明T5需要特殊的输入令牌化，但是在LC-Quad 1.0和LC-Quad 2.0数据集上产生最先进的性能，并且从以前的工作中优于特定于任务的模型。此外，这些方法可以为问题进行语义解析，以使输入的一部分需要复制到输出查询，从而在KG语义解析中启用新的范式。