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    Network Management Method Based on Optimal Control by Zhi Chai

    Published 2015-11-01
    “…With the development of access network technology,the burden of network management has greatly increased,and became more frequent.In such case,the network management will not only make the network system in good condition,but also need to make sure that the adjustment process of network is optimized.From the viewpoint of cybernetics,the problem in network management was studied.Based on optimal control theory,a method to optimize network management was proposed.The research results have been verified in Tianjin Unicom's network management system,the research on automatic control theory in network management will take important influence in this field.…”
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    Comment on “Analysis of Risk Factors Causing Adjacent Disc Degeneration After Percutaneous Kyphoplasty for Osteoporotic Vertebral Compression Fractures” [Letter] by Zeng X, Wang Y

    Published 2025-01-01
    “…Xuefan Zeng,1,* Yiwei Wang2,* 1Chongqing Medical University, Chongqing, People’s Republic of China; 2Tianjin University of Traditional Chinese Medical, Chongqing, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xuefan Zeng, Chongqing Medical University, No. 21,Mid University Town Road, Chongqing, 400016, People’s Republic of China, Email zxfcqmu@163.com…”
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    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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