Showing 121 - 140 results of 1,626 for search 'frequency machine methods', query time: 0.15s Refine Results
  1. 121

    Projection and assessment of future droughts in Iowa: developing a machine learning model and an interactive application by Ingrid Cintura, Antonio Arenas

    Published 2025-08-01
    “…Climate change has intensified the frequency and severity of droughts, significantly impacting water resources, agriculture, and ecosystems. …”
    Get full text
    Article
  2. 122

    Legal Judgment Prediction using Natural Language Processing and Machine Learning Methods: A Systematic Literature Review by Nasa Zata Dina, Sri Devi Ravana, Norisma Idris

    Published 2025-04-01
    “…There were 21 NLP methods applied, emphasizing the highest implementation of Term Frequency-Inverse Document Frequency (TF-IDF) while the most implemented ML method was Support Vector Machine (SVM). …”
    Get full text
    Article
  3. 123
  4. 124

    Implementation of Adaptive Short Time Fourier Transform and Sigmoid based Kernel Support Vector Machine for Radar Signal Identification by AHMAD Ashraf Adam, MUHAMMAD Farouk Isah

    Published 2025-05-01
    “…This paper proposes a novel approach that merges two powerful techniques: Adaptive Short-Time Fourier Transform (ASTFT) and Sigmoid Kernel Support Vector Machine (SVM). ASTFT offers exceptional time-frequency resolution, allowing for detailed signal decomposition, while the Sigmoid Kernel SVM provides robust classification capabilities. …”
    Get full text
    Article
  5. 125

    Continuous wave mud pulse data transmission method based on continuous gradation frequency keying modulation and Convolution neural network demodulation by Yingzhong Zhu, Zhenhua Xia, Yue Yang, Cihao Zhu, Guoqing Cai, Shuang Hu, Junhao Wang

    Published 2025-07-01
    “…This method employs Continuous Gradation Frequency Keying (CGFK) modulation combined with Convolution Neural Network (CNN) demodulation for continuous mud pulse data transmission. …”
    Get full text
    Article
  6. 126

    Frequency hopping modulation recognition based on time-frequency energy spectrum texture feature by Hongguang LI, Ying GUO, Ping SUI, Zisen QI

    Published 2019-10-01
    “…For frequency hopping modulation identification,a novel method based on time-frequency energy spectrum texture feature was proposed.Firstly,the time-frequency diagram of the frequency hopping signal was obtained by smoothed pseudo Wigner-Ville distribution,and the background noise of the time-frequency diagram was removed by two-dimensional Wiener filtering to improve the resolution of the time-frequency diagram under low SNR conditions.Then,the connected-domain detection algorithm was used to extract the time-frequency energy spectrum of each hop signal and convert it into a time-frequency gray-scale image.The histogram statistical features and the gray-scale co-occurrence matrix feature were combined to form a 22-dimensional eigenvector.Finally,the feature set was trained,classified and identified by optimized support vector machine classifier.Simulation experiments show that the multi-dimensional feature vector extracted by the algorithm has strong representation ability and avoids the misjudgment caused by the similarity of single features.The average recognition accuracy of the six modulation methods of frequency hopping signals BPSK,QPSK,SDPSK,QASK,64QAM and GMSK is 91.4% under the condition of -4 dB SNR.…”
    Get full text
    Article
  7. 127
  8. 128

    A Novel Method for Mechanical Fault Diagnosis Based on Variational Mode Decomposition and Multikernel Support Vector Machine by Zhongliang Lv, Baoping Tang, Yi Zhou, Chuande Zhou

    Published 2016-01-01
    “…A novel fault diagnosis method based on variational mode decomposition (VMD) and multikernel support vector machine (MKSVM) optimized by Immune Genetic Algorithm (IGA) is proposed to accurately and adaptively diagnose mechanical faults. …”
    Get full text
    Article
  9. 129

    Error Separation Method for Geometric Distribution Error Modeling of Precision Machining Surfaces Based on K-Space Spectrum by Zhichao Sheng, Jian Xiong, Zhijing Zhang, Taiyu Su, Min Zhang, Qimuge Saren, Xiao Chen

    Published 2024-12-01
    “…The effectiveness of the method was experimentally verified using two sets of machined surfaces. …”
    Get full text
    Article
  10. 130

    A Soft Start Method for Doubly Fed Induction Machines Based on Synchronization with the Power System at Standstill Conditions by José M. Guerrero, Kumar Mahtani, Itxaso Aranzabal, Julen Gómez-Cornejo, José A. Sánchez, Carlos A. Platero

    Published 2024-11-01
    “…In this paper, a soft start method for DFIM, inspired by the traditional synchronization method of synchronous machines, is proposed. …”
    Get full text
    Article
  11. 131
  12. 132

    Technical parameters analyses of different types of impact-vibration soil compacting machines by I. S. Tyuremnov

    Published 2024-01-01
    “…It is necessary to analyze the main technical characteristics of impactvibration machines of different types in order to assess the possibility of developing a mathematical model of soil compaction, combining several types of impact-vibration machines at once.Materials and methods. …”
    Get full text
    Article
  13. 133

    FPCB STIFFENER ADHESIVE MACHINE DYNAMIC PERFORMANCE OPTIMIZATION AND ACCURACY ANALYSIS by MEI LingLiang, LIN XiaoXia, MEI XueSong

    Published 2015-01-01
    “…Aiming at the problem of the FPCB( flexible printed circuit board) stiffener adhesive machine performance optimization,applying the finite element method,a FEA model of the FPCB stiffener adhesive machine has been set up. …”
    Get full text
    Article
  14. 134

    A New Bearing Fault Diagnosis Method Based on Deep Transfer Network and Supervised Joint Matching by Chengyao Liu, Fei Dong, Kunpeng Ge, Yuanyuan Tian

    Published 2024-01-01
    “…To overcome these problems, by integrating the superiority of deep learning method and feature-based transfer learning method, this work proposes an innovative cross-domain fault diagnosis framework based on deep transfer convolutional neural network and supervised joint matching. …”
    Get full text
    Article
  15. 135
  16. 136
  17. 137

    Early Detection of ITSC Faults in PMSMs Using Transformer Model and Transient Time-Frequency Features by Ádám Zsuga, Adrienn Dineva

    Published 2025-07-01
    “…Time-frequency features extracted via Discrete Wavelet Transform (DWT) from stator current signals are used to train a Transformer model for automated ITSC fault detection. …”
    Get full text
    Article
  18. 138
  19. 139

    Method for EEG signal recognition based on multi-domain feature fusion and optimization of multi-kernel extreme learning machine by Shan Guan, Tingrui Dong, Long-kun Cong

    Published 2025-02-01
    “…Secondly, multivariate autoregressive (MVAR) model, wavelet packet decomposition, and Riemannian geometry methods are used to extract features from the time domain, frequency domain, and spatial domain, respectively, to construct a joint time-frequency-space feature vector. …”
    Get full text
    Article
  20. 140