Toward satellite-terrestrial integration: 6G cloud-fog collaborative self-organizing network by PENG Mugen, YUAN Shuo

“…In addition, key technologies such as integrated communication, sensing, navigation, and control waveform, as well as resource management based on satellite onboard fog processing, along with mobility management and intelligent information processing based on cloud-fog collaboration, were elaborated in detail. …”
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Advanced Techniques and Antenna Design for Pulse Shaping in UWB Cognitive Radio by Lise Safatly, Mohammed Al-Husseini, Ali El-Hajj, Karim Y. Kabalan

“…The Parks-McClellan algorithm is employed, a neural network is trained, and a reconfigurable band stop filter is designed to generate an adaptive waveform with nulls at specific frequencies. Simulations, measurements, and analysis show that each generated UWB pulse has remarkable advantages in the frequency utilization, spectrum avoidance, and hardware implementation.…”
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Adaptive anti-jamming technologies based on direct sequence spread spectrum and single carrier frequency domain equalization by Fanglin GU, Yuzhen HUANG, Ying ZHAO, Haitao ZHAO, Jibo WEI

“…To solve the performance limitation of direct sequence spread spectrum system in complex multipath environment, an adaptive anti-jamming spread spectrum framework that organically combines single carrier frequency domain equalization (SCFDE) and direct sequence spread spectrum (DSSS) technologies was proposed.The frequency multipath fading was overcame by frequency domain equalization, and the transmission rates and high reliability was reconfigured by deploying variable spread factors.Moreover, the inherent fast Fourier transform process was made full use at the receiver to realize the adjoint detection and analysis of interference intensity, interference type and other information, etc.Then, the frequency domain bearing point online was optimized and selected to improve the adaptability to the interference, especially blocking interference.The simulation results show that the proposed direct spread spectrum waveform based on SCFDE has good communication performance in both Gaussian and multipath environments, and the notch of some frequency bands has little impact on the communication performance, which verifies the effectiveness of anti-jamming by adaptive optimizing information frequency domain bearers.…”
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Antenna Polarization Optimization for Target Detection in Non-Gaussian Clutter by Xu Cheng, Yong-zhen Li, Xue-song Wang

“…By employing the simulation, we demonstrate that the polarization waveform optimization can bring the significant performance gain on target detection as compared to the conventional full-polarization approach. …”
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A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count by Kasinath Jena, Dhananjay Kumar, B. Hemanth Kumar, K. Janardhan, Arvind R. Singh, Raj Naidoo, Ramesh C. Bansal

“…This paper presents a new single-source switched capacitor- (SC-) based multilevel inverter (MLI) design with a boosting potential of three times the supply voltage. To produce a waveform with seven output voltage levels, the suggested switching capacitor inverter consists of eight switches, single diode, and two capacitors. …”
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Optimization Design of a New Type of Interior Permanent Magnet Generator for Electric Vehicle Range Extender by Shilun Ma, Xueyi Zhang, Qinjun Du, Liwei Shi, Xiangyu Meng

“…At the same time, by means of the Taguchi method and employing finite element analysis, the rotor poles of generator are optimized to improve air gap magnetic density, the cogging torque, and the distortion of back-EMF waveform. Finally, the validity of proposed design methods is validated by the analytical and experimental results.…”
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De-noising algorithms for the raised cosine pulse signal using the minimum-energy frame in the discrete signal space by Ying-hai XIE, Wei YANG, Ting-ting FAN

“…The de-noising algorithms were proposed for the raised cosine pulse signal using minimum-energy(wavelet) frame in the discrete signal space.For the given two minimum-energy frames,the decomposition coefficients of sampled sequence appeared significant statistical characteristics difference between the raised cosine pulse signal and additive Gaussian noise under the frames’sub-sequences.Based on this,two threshold de-noising algorithms were provided to makes full use of the merit that the frame was fit for the de-noising work,they removed partial noise component while keeping the component of original signal and got effic nt de-noising result.The simulation results show that,when the modulating method is BPSK and its raised cosine pulse signal is polluted by the additive Gaussian noise,then if add a pre-processing link to denoise the receiving waveform using the algorithms,the receiver can greatly increase the signal-to-noise ratio of receiving signal and have about 3.1dB and 2.7dB performance gain of bit error ratio,respectively.…”
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Clock Synchronization Correction of User Receiving Terminals in Satellite Ground Integrated Communication Based on OFDM by LUO Ruixue, LI Yu, WANG Xin, MA Chong, SONG Guanglei

“…After experimental testing, it was found that applying this method for OFDM signal correction processing resulted in a more regular waveform of the communication signal. After applied this method for clock bias correction, the clock bias was relatively small, which improved the accuracy of clock bias synchronization correction for satellite ground integrated communication user receiving terminals.…”
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Automatic Classification of Microseismic Signals Based on MFCC and GMM-HMM in Underground Mines by Pingan Peng, Zhengxiang He, Liguan Wang

“…Therefore, here we present a new method for automatic classification of microseismic signals based on the Gaussian Mixture Model-Hidden Markov Model (GMM-HMM) by using only Mel-frequency cepstral coefficient (MFCC) features extracted from the waveform. The detailed implementation of our proposed method is described. …”
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On the Efficient Broadcasting of Heterogeneous Services over Band-Limited Channels: Unequal Power Allocation for Wavelet Packet Division Multiplexing by Maurizio Murroni

“…In wavelet packet division multiplexing (WPDM), the message signals are waveform coded onto wavelet packet basis functions. …”
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Accurate location method of branch line break fault in distribution network considering system operation mode by XU Fei, DENG Yanzhen, LIU Honghui, WANG Hui, ZHAO Haiyang

“…The example analysis results show that after obtaining a high-precision traveling wave signal waveform, the relative error of fault localization results at different sampling rates is reduced by 48% and 12%.…”
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Application of Acoustic Emission on the Characterization of Fracture in Textile Reinforced Cement Laminates by J. Blom, J. Wastiels, D. G. Aggelis

“…Preliminary results show that AE waveform parameters like frequency and energy are changing during loading, following the shift of fracturing mechanisms. …”
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Investigating the Pavement Vibration Response for Roadway Service Condition Evaluation by Zhoujing Ye, Yang Lu, Linbing Wang

“…The acceleration extrema, the time-domain signal waveform, the frequency distribution, and the sum of squares of Fourier amplitude can be potential indexes for evaluating roadway service condition. …”
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Computational Simulation and Modeling of Freak Waves Based on Longuet-Higgins Model and Its Electromagnetic Scattering Calculation by Gengkun Wu, Chuanxi Liu, Yongquan Liang

“…In addition, by comparing the target wave spectrum and the freak wave measured in Tokai of Japan from the perspective of B-F instability and spectral peakedness, it is proved that the waveform of the simulated freak waves can not only maintain the spectral structure of the target ocean wave spectrum, but also accord with the statistical characteristics of the wave sequences. …”
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Nonlinear Vibrations of FGM Cylindrical Panel with Simply Supported Edges in Air Flow by Y. X. Hao, W. Zhang, S. B. Li, J. H. Zhang

“…The bifurcations, Poincare section, waveform, and phase plots are presented.…”
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Nucleon-nucleon short-range correlations: A hidden driver in binary neutron star inspiral gravitational waves by Bin Hong, Tongqi Liang, Zhongzhou Ren

“…Additionally, SRCs appear to accelerate the BNS inspiral process, leading to a shorter retarded time and notable deviation in the gravitational waveform. These results underscore the critical role of SRC in shaping the features of inspiral gravitational waves and propose that inspiral gravitational waves could potentially serve as an effective probe for detecting SRC phenomena within neutron stars.…”
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Regenerative Braking Energy Flow Control Algorithm for Power Grid Voltage Stabilization in Mobile Energy Storage Systems by Ivan Župan, Viktor Šunde, Željko Ban, Branimir Novoselnik

“…The method is based on an algorithm that identifies the need to utilize the energy of the SC ESS depending on changes in the voltage of the power grid caused by the driving of other nearby tram vehicles. The waveform of the current flowing into or out of the SC ESS during this control is determined based on Pontryagin’s minimum principle, which optimizes the minimum change in the voltage level at the pantograph and the minimum temperature of the supercapacitor. …”
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STUDY ON VIBRATION CHARACTERISTICS OF ROTOR SYSTEM WITH COUPLING FAULT OF DISC⁃SHAFT LOOSENESS AND RUBBING by TIAN DanYang, LI ZhiNong, ZHOU ShiJian, LI YunLong

“…During the operation of the rotor system,parts may fall and loose,resulting in rubbing between the external object and the rotor shaft.To solve this problem,a finite element model of rotor systems with coupling fault was established by considering the case that disc⁃shaft loosening and rubbing occur simultaneously.Ansys was employed to simulate the rotor system.The influence of the looseness on the vibration characteristics of the rotor system was analyzed.Experiments were carried out to verify the simulation results.The results show that the time⁃domain waveform of the rotor system changes periodically,and the spectrogram mainly contains the first harmonic component.With the aggravation of the looseness,high frequency components gradually appear in the spectrum.The initial value of the speed difference of the disc⁃shaft in the start⁃up phase gradually increases with the aggravation of the loosening.The vibration amplitude of the disc center trajectory in the vertical direction also increases with the aggravation of the looseness,and the orbit shape becomes more complex.Due to the influence of the rubbing,the vibration in the vertical direction is obviously suppressed,and its amplitude is smaller than that in the horizontal direction.The research results have very important reference value for the study on dynamic characteristics of rotor systems with coupling faults.…”
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Compensation of active filter using p-q theory in photovoltaic systems by Farzane Soleimani Rudi, Mohammad Naser Hashemnia

“…Moreover, the sinusoidal waveform of the three-phase grid currents demonstrates the effectiveness of the proposed controller. …”
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RESEARCH ON OPTIMAL SELECTION OF UITRASONIC GUIDED WAVE DETECTION FREQUENCY IN DIRT PIPES BASED ON CHIRP EXCITATION by SUN LingFang, ZHANG Ying, WU ChunYing, PIAO Heng

“…The best detection frequency was determined through the comparing energy distribution and modal purity of the different frequency guided wave responses that it was calculated from the chirp response, and combined with time-frequency analysis method to determine the appropriate waveguide frequency interval according to the distribution of the response waveform energy of the dirt pipe. It had shown from simulation analysis and experiment studies that: the center frequency of about 175 kHz was the most appropriate for guided wave detection of investigating dirt pipe. …”
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