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    Study on the Speed Stability of Wheel Drive Mechanism used in Lunar Rover by Xiao Jie, Zeng Lingbin, Zhang Xiaowei, Liu Dianfu, Zou Huaiwu

    Published 2015-01-01
    “…The 3-stage planetary reducer with closed-loop control is adopted in CE-3 lunar rover wheel drive mechanism.Aiming at the problem that the speed stability of drive mechanism does not satisfy the design requirements,the factors affecting the speed stability of planetary reducer are systematically analyzed,and methods and measures minimizing the inequality of load sharing of planetary gear sets are studied carefully.Through troubleshooting and numerical simulations,the causation is uncovered as follows:the first stage sun gear radial runout exceeds the allowed range.Then two solutions are proposed:the first one is to redesign the first stage sun gear into a floating sun gear,the second one is to improve the machining precision of the first stage sun gear.And the second solution is adopted because it is smaller and lighter than the first one.Then much ground simulation tests which are conducted at the room condition,high-temperature vacuum condition and low-temperature vacuum condition demonstrate that the speed stability of drive mechanism satisfies the design requirements.At last,the effectiveness of the proposed method is validated by the telemetry parameters of lunar rover moving on the moon surface.…”
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  3. 283

    Influence of Roughness on Isothermal Elastohydrodynamic Lubrication of Roller Enveloped Worm Drive by Yan Qi, Honghui Liao, Xudong Wang, Zaixin Liu, Jinkuan Li

    Published 2022-09-01
    “…Based on the meshing principle of the roller enveloped end face worm drive pair, the influence of the center distance, the roller radius, the throat coefficient, and the worm gear diameter are considered comprehensively. …”
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    Development of a Driving Cycle for Fuzhou Using K-Means and AMPSO by Minrui Zhao, Hongni Gao, Qi Han, Jiaang Ge, Wei Wang, Jue Qu

    Published 2021-01-01
    “…A driving cycle is developed based on firsthand driving data collected from fieldwork. …”
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  7. 287

    Innate and Adaptive Cell Populations Driving Inflammation in Dry Eye Disease by José L. Reyes, Danielle T. Vannan, Bertus Eksteen, Imelda Juárez Avelar, Tonathiu Rodríguez, Marisol Ibet González, Alicia Vázquez Mendoza

    Published 2018-01-01
    “…This review focuses on what is currently understood about the contribution of innate and adaptive immune cell populations in the pathogenesis of DED and highlights the need to continue investigating the central role of immunity driving DED.…”
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    Continuum Model for Traffic Flow considering Safe Driving Awareness Heterogeneity by Youzhi Zeng, Ning Zhang

    Published 2015-01-01
    “…This paper defines the concepts of region representative vehicle and driver and region representative safe driving awareness and its heterogeneity, and, based on these concepts and a new car-following model proposed, it proposes a new continuum model for traffic flow considering region representative safe driving awareness heterogeneity. …”
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  12. 292

    The evolution and driving mechanism of education inequality in China: From 2003 to 2020. by Yuanzhi Guo, Xuhong Li

    Published 2025-01-01
    “…However, this mechanism is heterogeneous in different regions, therefore, we put forward the corresponding policies and measures according to the regional driving effects of influencing factors.…”
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  13. 293

    DNA replication initiation drives focal mutagenesis and rearrangements in human cancers by Pierre Murat, Guillaume Guilbaud, Julian E. Sale

    Published 2024-12-01
    “…Here we show that efficient sites of replication initiation drive and modulate specific mutational processes in cancer. …”
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    Influence of Base Oil on Planar Double Enveloping Hourglass Worm Drive by Fayang He, Zhanshan Li

    Published 2021-11-01
    “…In order to study the influence of different base oils on the lubrication of planar double enveloping hourglass worm drive,running in test is carried out. It is found that,when using polyethylene glycol synthetic oil,the transmission efficiency increases by 4.5% and the temperature rise is 15 ℃ lower than that of poly-alpha-olefins synthetic oil. …”
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