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    A frequency offset compensation method based on all phase FFT amplitude by Yingjie ZHU, Wuxiong ZHANG, Huiyue YI, Hui XU

    Published 2022-06-01
    “…Distance measurement is an important part of the wireless location technology.The ranging accuracy of millimeter wave based distance measurement depends on the frequency estimation accuracy of beat signals from the targets, but the existing frequency estimation algorithms have the shortcomings of either high complexity or low accuracy.In order to improve the ranging accuracy, the frequency compensation value and frequency estimation method based on all phase FFT amplitude was proposed to improve the performance of frequency estimation.Firstly, the signal amplitude was estimated based on the relationship between its all phase FFT and its conventional FFT spectrum.Moreover, using the relationship between the estimated signal amplitude, the signal spectrum amplitude and frequency compensation value, the frequency compensation value was solved by Newton iterative algorithm.Then, the frequency compensation value was used to shift the frequency of the signal, and the frequency compensation value was estimated again to obtain the final estimation value of the signal frequency, from which the distance of the target was calculated.Finally, simulation results were presented to show that the proposed method has higher distance measurement accuracy than the existing methods.…”
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  3. 163

    UKSSL: Underlying Knowledge Based Semi-Supervised Learning for Medical Image Classification by Zeyu Ren, Xiangyu Kong, Yudong Zhang, Shuihua Wang

    Published 2024-01-01
    “…<italic>Results:</italic> UKSSL evaluates on the LC25000 and BCCD datasets, using only 50&#x0025; labeled data. …”
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  4. 164

    Joint amplitude and phase partition based physical layer key generation method by Nannan LI, Yu HAN, Ning GAO, Shi JIN

    Published 2021-05-01
    “…A key generation method based on wireless channel physical layer features is of great significance for improving security of wireless transmission.An orthogonal frequency division multiplexing (OFDM) communication system based on time division duplex (TDD) with multipath fading channels was considered.Utilizing the advantages of OFDM multicarrier and the channel reciprocity and combining the phase and amplitude information of channel frequency response (CFR), two algorithms for physical layer key generation were proposed.Theoretical analysis and experimental simulation show that the proposed algorithm has more consistent and smaller overhead in information negotiation, in addition, the proposed algorithm can increase the key length and enhance randomness, and has a better defense capability against eavesdropping and active attacks of the illegal user.…”
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  5. 165

    Fault-Tolerant Guidance of Rocket Vertical Landing Phase Based on MPC Framework by Jingqi Li, Yaosong Long, Mao Su, Lei Liu, Bo Wang, Zhongtao Cheng

    Published 2022-01-01
    “…In this paper, a fault-tolerant guidance method based on the MPC framework is put forward. First, we propose a piecewise guidance algorithm that combines a trajectory optimization algorithm based on convex optimization with the MPC framework. …”
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    Dual-phase ceramics based on multi-cation boride and carbide: Investigations at the nanoscale by Steven M. Smith, II, Nicola Gilli, William G. Fahrenholtz, Gregory E. Hilmas, Sandra García-González, Emilio Jiménez-Piqué, Stefano Curtarolo, Laura Silvestroni

    Published 2025-01-01
    “…A dual phase boride and carbide ceramic with the nominal composition (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2 and (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C was prepared by reactive synthesis and consolidated by spark plasma sintering. …”
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  9. 169

    Alkali Metal Modification of Silica Gel-Based Stationary Phase in Gas Chromatography by Ashraf Yehia El-Naggar

    Published 2013-01-01
    “…Also, thermodynamic parameters (ΔH, ΔG, and ΔS) were determined using n-hexane as a probe in order to show the adsorbate-adsorbent interaction. …”
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    Flow Patterns Transition Law of Oil-Water Two-Phase Flow under a Wide Range of Oil Phase Viscosity Condition by Wei Wang, Wei Cheng, Kai Li, Chen Lou, Jing Gong

    Published 2013-01-01
    “…For oil with a high viscousity, boundaries of core-annular flow are based on criteria proposed by Bannwart and Strazza et al. and neutral stability law ignoring that the velocity of the viscous phase is introduced for stratified flow. …”
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    BPH Procedural Treatment: The Case for Value-Based Pay for Performance by Mark Stovsky, Irina Jaeger

    Published 2008-01-01
    “…This paper reviews current paradigms and, using BPH procedural therapy outcomes, cost, and reimbursement data, makes the case for a fundamental change in perspective to value-based pay for performance as a reimbursement system with the potential to align the interests of patients, physicians, and payers and to improve global clinical outcomes while preserving free choice of clinically efficacious treatments.…”
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  15. 175

    Skull Base Osteomyelitis in the Emergency Department: A Case Report by Mustafa Burak Sayhan, Cemil Kavalci, Ozgur Sogüt, Eylem Sezenler

    Published 2011-01-01
    “…Skull base osteomyelitis (SBO) is a rare clinical presentation and usually occurs as a complication of trauma or sinusitis. …”
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  16. 176

    STRUCTURAL OPTIMIZATION OF GEARBOX CASES BASED ON FATIGUE LIFE PREDICTION by CHEN ChaoPeng, YANG GuangWu, XIAO ShouNe, ZHU Tao, XIAO FeiXiong, GAO TianYang

    Published 2021-01-01
    “…According to the cracks in the gearbox of a certain type of diesel locomotive,the finite element model of gear box was established to make the life prediction by using the random vibration fatigue theory and the linear fatigue cumulative damage theory of Palmgren-Miner. …”
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  17. 177

    A Case-Based Reasoning Method for Remanufacturing Process Planning by Fan Zhou, Zhigang Jiang, Hua Zhang, Yan Wang

    Published 2014-01-01
    “…This paper presents a case-based reasoning method for remanufacturing process planning, which allows a process planner to rapidly retrieve, reuse, revise, and retain the solutions to past process problems. …”
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