人类世界能够赋予的最高学历,一般被视为进入科研领域和学术圈的门槛。

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报告主题: 信息检索

报告摘要: 引入结构化的知识是目前辅助自然语言处理任务的重要方法之一。如何准确地从自由文本中获取结构化信息,以及进行有效的知识表示在近几年取得了广泛关注。在这次报告中,讲者将梳理知识表示与获取的发展脉络,分享相关领域的最新工作进展,报告人将会以他在知识表示与关系抽取上的若干代表工作为例子,对研究中遇到的具体问题进行深入探讨分析,并结合讲者个人的工作经验,讨论如何体系化地开展研究工作以及学术合作等问题,分享其在解决问题的过程中的一些心得体会。

邀请嘉宾: 韩旭 清华大学计算机系17级博士研究生,来自清华大学自然语言处理组,由刘知远副教授指导,主要研究方向为自然语言处理及信息抽取。目前已在人工智能、自然语言处理等领域的著名国际会议ACL,EMNLP,NAACL,COLING,AAAI发表相关论文多篇,在Github上维护开源工程多项。

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最新论文

PHD filtering is a common and effective multiple object tracking (MOT) algorithm used in scenarios where the number of objects and their states are unknown. In scenarios where each object can generate multiple measurements per scan, some PHD filters can estimate the extent of the objects as well as their kinematic properties. Most of these approaches are, however, not able to inherently estimate trajectories and rely on ad-hoc methods, such as different labeling schemes, to build trajectories from the state estimates. This paper presents a Gamma Gaussian inverse Wishart mixture PHD filter that can directly estimate sets of trajectories of extended targets by expanding previous research on tracking sets of trajectories for point source objects to handle extended objects. The new filter is compared to an existing extended PHD filter that uses a labeling scheme to build trajectories, and it is shown that the new filter can estimate object trajectories more reliably.

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