Search Results - Lun Zhao

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  1. 1
    Vibration Damage Analysis of Bottom Hole Assembly Under Axial Impact Based on Dynamic Analysis

    Vibration Damage Analysis of Bottom Hole Assembly Under Axial Impact Based on Dynamic Analysis by Qilong Xue, Yafeng Li, Jianbo Jia, Lun Zhao

    Published 2025-06-01

    Impact Drilling Technology is one of the most effective methods for enhancing the penetration rate and efficiency in hard rock formations. Downhole axial vibration impact tools can provide a stable impact load, but they also increase the complexity of the Bottom Hole Assembly (BHA) motion. Addressin...

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  2. 2
    QPSK Vector Millimeter-Wave Signal Generation Based on Odd Times of Frequency Without Precoding

    QPSK Vector Millimeter-Wave Signal Generation Based on Odd Times of Frequency Without Precoding by Lun Zhao, Lian Xiong, MingXia Liao, Song Liu, Xiang Yu

    Published 2018-01-01

    In this paper, we propose a novel quadrature phase-shift keying (QPSK) vector millimeter-wave (mm-wave) signal generation based on odd times of frequency without precoding. The radio frequency (RF) vector signal generation module is universal for the generation of millimeter-wave signal with any odd...

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  3. 3
    16QAM Vector Millimeter-Wave Signal Generation Based on Phase Modulator With Photonic Frequency Doubling and Precoding

    16QAM Vector Millimeter-Wave Signal Generation Based on Phase Modulator With Photonic Frequency Doubling and Precoding by Lun Zhao, Jianguo Yu, Lei Chen, Ping Min, JiaHeng Li, Renfan Wang

    Published 2016-01-01

    In this paper, we experimentally demonstrate a method to generate a frequency-doubling photonic 16-quadrature-amplitude-modulation (16QAM) vector millimeter-wave (mm-wave) signal by using a single phase modulator (PM) with an amplitude and phase precoding technique. The PM is driven by a 2-Gbaud 16Q...

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  4. 4
    Terahertz-Wave Generation Based on Optical Frequency Comb and Single Mach-Zehnder Modulator

    Terahertz-Wave Generation Based on Optical Frequency Comb and Single Mach-Zehnder Modulator by Jianguo Yu, Kaile Li, Yuanxiang Chen, Lun Zhao, Yongtao Huang, Yitong Li, Jie Ma, Feilong Shan

    Published 2020-01-01

    A novel Terahertz-wave (THz-wave) generation on the strength of optical frequency comb and single push-pull Mach-Zehnder modulator (MZM) with a pair of transmitter and receiver in 0.4-THz band is proposed. The advantages of the optical frequency comb based on phase modulator (PM) 1 and PM2 in series...

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  5. 5
    ORF138 causes abnormal lipid metabolism in the tapetum that leads to Ogu cytoplasmic male sterility in Brassica napus

    ORF138 causes abnormal lipid metabolism in the tapetum that leads to Ogu cytoplasmic male sterility in Brassica napus by Xiaoyu Ge, Junlin Chen, Ouqi Li, Min Zou, Baolong Tao, Lun Zhao, Jing Wen, Bin Yi, Jinxing Tu, Jinxiong Shen

    Published 2025-06-01

    Mutations and rearrangements of mitochondrial genes cause plant cytoplasmic male sterility. It is a significant way to utilize hybrid vigor to enhance crop yield. Ogu cytoplasmic male sterility (CMS) is a natural cytoplasmic male sterility type discovered in radishes, being successfully transferred...

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