Showing 41 - 60 results of 63 for search '"wavelet analysis"', query time: 0.05s Refine Results
  1. 41

    Study on Missing Data Filling Algorithm of Nuclear Power Plant Operation Parameters by Tianshu Wang, Ren Yu, Qiao Peng

    Published 2022-01-01
    “…Firstly, to locate the missing data accurately the detecting algorithm for missing data of the NPP operation parameters based on wavelet analysis. Different judging basis is proposed for discrete and continuous missing respectively. …”
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  2. 42

    The Vibration Characteristics of Ground of Rock Blasting in Silt-Rock Strata by Tao Yin, Chuanbo Zhou, Changqing Zheng, Jugen Fu, Ziru Guo

    Published 2021-01-01
    “…According to the measured data of blasting vibrations at the sites, the waveform duration of vibration acceleration and the distribution characteristics of dominant frequency of vibration velocity were analyzed, the energy characteristics of vibration velocity were researched by wavelet analysis, and the attenuation laws of vibration velocity were studied by dimensional analysis (DA). …”
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  3. 43

    Pyramidal Watershed Segmentation Algorithm for High-Resolution Remote Sensing Images Using Discrete Wavelet Transforms by K. Parvathi, B. S. Prakasa Rao, M. Mariya Das, T. V. Rao

    Published 2009-01-01
    “…In this paper, an efficient segmentation method for high-resolution remote sensing image analysis is presented. Wavelet analysis is one of the most popular techniques that can be used to detect local intensity variation and hence the wavelet transformation is used to analyze the image. …”
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  4. 44

    Forecasting Daily Precipitation Using Hybrid Model of Wavelet-Artificial Neural Network and Comparison with Adaptive Neurofuzzy Inference System (Case Study: Verayneh Station, Naha... by Abazar Solgi, Vahid Nourani, Amir Pourhaghi

    Published 2014-01-01
    “…In the present study, wavelet analysis combined with artificial neural network and finally was compared with adaptive neurofuzzy system to predict the precipitation in Verayneh station, Nahavand, Hamedan, Iran. …”
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    Article
  5. 45

    Research on Wavelet Singularity Detection Based Fault-Tolerant Federated Filtering Algorithm for INS/GPS/DVL Integrated Navigation System by Jianhua Cheng, Daidai Chen, Rene Landry Jr., Lin Zhao, Dongxue Guan

    Published 2014-01-01
    “…To solve this problem, a wavelet analysis and signal singularities based soft fault detection method are given out. …”
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    Article
  6. 46

    Dynamic Response and Its Frequency Domain Characteristics of Lateritic Soil Subgrade under Traffic Load during Construction by Wei Bai, Kun Mu, Lingwei Kong, Wenbo Zhang, Xiu Yue

    Published 2020-01-01
    “…The distribution law of the dynamic response and its frequency domain characteristics obtained by wavelet analysis emerged. The vibration of the subgrade is clearly aggravated by the increase of speed and load. …”
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  7. 47

    Market Power, NAIRU, and the Phillips Curve by Derek Zweig

    Published 2020-01-01
    “…We find weak evidence supporting the NAIRU theory from the simplistic model, but stronger evidence using BVAR. A wavelet analysis reveals that the short-run NAIRU theory and Phillips curve relationships may be time-dependent, while the long-run relationships are essentially vertical, suggesting instead that each relationship is primarily observed over the medium-term (2-10 years), though the economically significant medium-term region has narrowed in recent decades to roughly 4-7 years. …”
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  8. 48

    Spatial and Temporal Variability of Sea Surface Temperature in Eastern Marginal Seas of China by Renhao Wu, Jianmin Lin, Bo Li

    Published 2016-01-01
    “…In order to investigate the interannual variation of SST, the EMSC SST interannual index was constructed. Based on wavelet analysis, a significant peak around 3.3 years was found in the EMSC SST interannual index. …”
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  9. 49

    Diagnosis experience of traction engines of locomotives by Ngoulou-A-Ndzeli, V. Yu. Tetter, V. G. Shakhov

    Published 2019-03-01
    “…Authors propose a method and algorithms for the rapid diagnosis of locomotives traction engines based on duplication of main frequency channel by additional wavelet analysis and decision — making on the methodology of fuzzy logic. …”
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  10. 50

    Condition monitoring of urban rail transit by local energy harvesting by Mingyuan Gao, Yunwu Li, Jun Lu, Yifeng Wang, Ping Wang, Li Wang

    Published 2018-11-01
    “…An application case of the technology is introduced: the sensor nodes of the wireless sensor network are powered by the electromagnetic energy harvester and lithium battery with DC-DC boost converter, thereby continuously monitoring the railway track state; based on the Littlewood–Paley wavelet analysis of measured railway track acceleration data, the abnormal signal caused by the wheel out-of-roundness can be detected.…”
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  11. 51

    Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform by Zhen Liu

    Published 2021-01-01
    “…HHT can overcome the dependence of wavelet analysis on the selection of mother wave, and thus more complex velocity pulses can be identified. …”
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  12. 52

    Experiment Analysis of Drilling Feedback Signal from Simulation of Roadway Roof by Gang Guo, Haoyuan Zhao, Zhilong Qi, Chenjun Hu, Baofu Zhao, Shengzhi Wang

    Published 2022-01-01
    “…Well, through the extraction and comparison of the wavelet feature-scale entropy values, it is concluded that the wavelet analysis can be used as a reference rather than a decisive factor to determine the complete and broken layers. …”
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  13. 53

    Morphological variability of otolith organs in three congeneric Pagellus species by Bostanci Derya, Yedier Serdar, Türker Dilek, Işmen Ali

    Published 2024-04-01
    “…This is the first study to provide detailed morphological characters and wavelet analysis of left- and right-side otoliths in these three congeneric Pagellus species from the Aegean Sea.…”
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  14. 54

    Research on Revenue Insurance Premium Ratemaking of Jujube Based on Copula-Stochastic Optimization Model by Li-Mei Qi, Ruo-Yu Yao, Xing-Zhe Zhang, Yu-Jing Zhang, Xiao-Yin Wang, Jian-Ping Tao, Jia-Ming Zhu

    Published 2021-01-01
    “…In the study, firstly, wavelet analysis method was used to stabilize the jujube yield per unit area and the jujube price from 1997 to 2018 in Aksu region, Xinjiang, China. …”
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  15. 55

    The nexus between the financial development and CO2 emissions: fresh evidence through time–frequency analyses by Faik Bilgili, Erhan Muğaloğlu, Sevda Kuşkaya, Javier Cifuentes-Faura, Kamran Khan, Mohammed Alnour

    Published 2025-01-01
    “…In this research, the nexus between the domestic financial sector (total debt securities, loans, liabilities, and total financial assets) and Carbon dioxide emissions in the U.S. is investigated by Morlet wavelet analysis. Rest of the world: sector discrepancy transactions, rest of the world: debt securities and loans, gross domestic product, and the square of the gross domestic product, are control variables in the estimated models. …”
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  16. 56

    Large-Scale Linkages of Socioeconomic Drought with Climate Variability and Its Evolution Characteristics in Northwest China by Siyuan Liu, Jianfeng Zhang, Ni Wang, Na Wei

    Published 2020-01-01
    “…The results showed that (1) the drought intensity in the up-midstream region is stronger than that in the downstream region; in view of the hysteresis in the downstream region, the occurrence of drought in the up-midstream region could be regarded as an early warning to implement preventive measures in the downstream region; (2) an increasing trend in socioeconomic drought throughout the basin exists on both monthly and annual scales, which indicates that the increasing possibility of drought should be effectively addressed; (3) cross wavelet analysis indicated that the large-scale climate indices contribute to the variations in the socioeconomic droughts throughout the basin, indicating that climate variability may provide a reference for managers to deal with socioeconomic drought in the HRB.…”
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  17. 57

    Statistical Downscaling and Projection of Future Air Temperature Changes in Yunnan Province, China by Jiaxu Liu, Sujing Chen, Lijuan Li, Jiuyi Li

    Published 2017-01-01
    “…Periodic features were obtained by wavelet analysis. The results showed the following. (1) The pattern of change and the numerical values of the air temperature could be reasonably simulated, with the average R2 between observed and generated data being 0.963 for calibration and 0.964 for validation. (2) All scenarios projected increases of different degrees of temperature in all seasons, except for spring in the 2020s. …”
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  18. 58

    Improved Continuous Wavelet Transform for Modal Parameter Identification of Long-Span Bridges by Mingjin Zhang, Xu Huang, Yongle Li, Hao Sun, Jingyu Zhang, Bin Huang

    Published 2020-01-01
    “…Accurate and timely identification of modal parameters of long-span bridges is important for bridge health monitoring and wind tunnel tests. Wavelet analysis is one of the most advantageous methods for identification because of its good localization characteristics in both time and frequency domain. …”
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  19. 59

    Trends and Spatiotemporal Patterns of the Meteorological Drought in the Ili River Valley from 1961 to 2023: An SPEI-Based Study by Su Hang, Alim Abbas, Bilal Imin, Nijat Kasim, Zinhar Zunun

    Published 2025-01-01
    “…The SPEI drought index, along with Sen’s trend analysis, the Mann–Kendall test, the cumulative departure method, and wavelet analysis, were employed to assess drought patterns. …”
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  20. 60

    Dynamic Interrelation between Aggregated Revenues and Expenditures of Regional-Level Budgets of Federal States: A Time-Frequency Approach to Analysis by Alan K. Karaev, Oksana S. Gorlova, Vadim V. Ponkratov, Margarita L. Vasyunina, Andrey I. Masterov, Hongor N. Zambaev, Lolita H. Gueva

    Published 2024-07-01
    “…The theoretical significance of the study lies in the substantiation that continuous wavelet analysis is a powerful tool for studying the nonlinear relationship between revenues and expenditures, since understanding the causalities between revenues and expenditures on various time scales is significant for choosing measures aimed at maintaining the budget sustainability of the federal constituent entities. …”
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