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369 results on '"Zhao, Sicong"'

3. Pick Planning Strategies for Large-Scale Package Manipulation

Author

Li, Shuai, Keipour, Azarakhsh, Jamieson, Kevin, Hudson, Nicolas, Zhao, Sicong, Swan, Charles, and Bekris, Kostas

Subjects
Computer Science - Robotics, Computer Science - Artificial Intelligence, Computer Science - Machine Learning
Abstract

Automating warehouse operations can reduce logistics overhead costs, ultimately driving down the final price for consumers, increasing the speed of delivery, and enhancing the resiliency to market fluctuations. This extended abstract showcases a large-scale package manipulation from unstructured piles in Amazon Robotics' Robot Induction (Robin) fleet, which is used for picking and singulating up to 6 million packages per day and so far has manipulated over 2 billion packages. It describes the various heuristic methods developed over time and their successor, which utilizes a pick success predictor trained on real production data. To the best of the authors' knowledge, this work is the first large-scale deployment of learned pick quality estimation methods in a real production system., Comment: 2023 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Learning Meets Model-based Methods for Manipulation and Grasping Workshop

Published
2023

7. Study on End Underframe Fatigue Life of a Certain Type of Metro Train

Author

LIU Longxi, ZHAO Sicong, CHEN Shujie, and WANG Kang

Subjects
metro train, end underframe, fatigue test, finite element, Transportation engineering, TA1001-1280
Abstract

Objective The car body of metro vehicle is a welded structure, and its fatigue strength is obviously smaller than that of the base metal due to the influence of stress concentration, welding defects and welding residual stress. As the part connecting bogie and car body, the end underframe of metro vehicle bears more load.Therefore, it is necessary to study its fatigue life. Method The numerical simulation and fatigue test are jointly used to study the fatigue life of the end underframe of a certain type of metro train. Firstly, a finite element model of metro vehicle is established and the corresponding fatigue load and evaluation points are determined.Then, the fatigue damage simulation is carried out on the whole train and the end underframe respectively. Finally,the bench test on the end underframe is performed, and the result is compared with that of the train fatigue test and the simulation result of the end underframe. Result & Conclusion Under the condition of unidirectional fatigue damage and combined load fatigue damage, both the vehicle chassis (underframe) and the end underframe of the metro train car body have no risk of cracking, meeting the requirements of the relevant standards. Meanwhile, the end underframe can obtain more conservative results in fatigue test when the load is amplified, and the simulation results of the end underframe finite element model are in good agreement with its test results, which can truly reflect the stress state of the train model and meet the requirements of the relevant standards.

Published
2024
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39. Alkali‐Mediated/Catalyzed Transition‐Metal‐Free Tandem Reaction Triggered by the Borrowing Hydrogen and Aerobic Dehydrogenation Processes of Alcohols.

Author

Chang, Ai, Zhou, Weihao, Zhao, Sicong, Song, Haowen, Zhuang, Yi, Lin, Yamei, Huang, Shenlin, and Lu, Guo‐Ping

Abstract

The transformation of alcohols to important classes of compounds is a central topic in chemistry because they are abundant, renewable, and attractive building blocks. The alkali‐mediated/catalyzed borrowing hydrogen and aerobic dehydrogenation processes of alcohols open a new and sustainable access for the alcohol conversion under transition‐metal‐free conditions. In this review, we summarize the recent alkali‐mediated/catalyzed sequential reactions involving the borrowing hydrogen and aerobic dehydrogenation processes of alcohols. Furthermore, this review not only introduces the tentative pathways of these transformations, but also discusses the role of alkali, solvent effects, and substrate reactivity on these reactions. [ABSTRACT FROM AUTHOR]

Published
2024
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