Showing 7,201 - 7,220 results of 7,701 for search '"Beijing"', query time: 0.10s Refine Results
  1. 7201

    Comparison of PM2.5 Chemical Compositions during Haze and Non-haze Days in a Heavy Industrial City in North China by Menghui Li, Liping Wu, Xiangyan Zhang, Xinwu Wang, Wenyu Bai, Jing Ming, Chunmei Geng, Wen Yang

    Published 2020-05-01
    “…The NO3/SO42- and OC/EC ratios indicated that coal combustion and motor vehicle emission were the primary sources of pollution, and back-trajectory analysis revealed that the air masses over Zibo on haze days mainly originated in adjacent areas in Shandong Province and the Beijing-Tianjin-Hebei region (BTH). The haze episode was caused by a combination of unfavorable meteorological conditions, secondary formation, the accumulation of local pollutants, and peripheral transmission.…”
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  3. 7203

    The Soviet Factor in the US-China Military-Technical Cooperation during the Cold War by Yinan Li

    Published 2021-10-01
    “…Thus, the author concludes that the US arms sales to China from the very beginning were conditioned by the dynamics of the Soviet-American relations and Beijing’s willingness to play an active role in the policy of containment. …”
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    Characteristics and Sources of Organic Aerosol Markers in PM2.5 by Zheng Li, Ruiwen Zhou, Yuanyuan Li, Min Chen, Yachen Wang, Tonglin Huang, Yanan Yi, Zhanfang Hou, Jingjing Meng, Li Yan

    Published 2021-08-01
    “…Potential source contribution function (PSCF) and concentration-weight trajectory (CWT) results indicating that Shandong Province and Beijing-Tianjing-Hebei (BTH) region made important contribution to the levels of PM2.5 in Jinan during the winter. …”
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