This study focuses on the development of an alkali-activated lightweight foamed material (AA-LFM) with enhanced density. Several mixes tungsten waste mud (TWM), grounded glass (WG), and metakaolin (MK) were produced. Al powder as a foaming agent was added, varying from 0.009 w.% to 0.05 precursor weight. Expanded granulated cork (EGC) particles incorporated (10% 40% total volume precursors). Th...

Abstract For purpose of solve the problem poor discrimination and robustness intra-pulse signal features extracted by traditional methods, this paper proposes a radar modulation type recognition algorithm based on improved residual network. Firstly, one-dimensional time-domain is converted into two-dimensional time-frequency image Smoothing Pseudo Wigner-Ville Distribution; Then preprocessed; R...

There are many kinds of linear canonical transform (LCT)-based Wigner distributions (WDs), which very effective in detecting noisy frequency-modulated (LFM) signals. Among WDs LCT domains, the instantaneous cross-correlation function type distribution (ICFWD) attracts much attention from scholars, because it achieves not only low computational complexity but also good detection performance. How...

The complex acoustic intensity method is one of the common methods used for azimuth estimation single-vector sensors. However, this establishes a relationship between frequency and azimuth, which limits its practical applicability multiple linear modulation (LFM) signals with overlapping domains. In paper, time–frequency distribution information LFM signal combined method, more parameter to exp...

In this paper, a novel multi-fidelity modelling-based optimisation framework is developed for the robust design of composite structures. The proposed provides significant savings on computation time compared to both conventional and high-fidelity modelling methods while maintaining an acceptable level accuracy. Artificial neural networks (ANNs) multi-level approach are incorporated into formula...

This paper outlines basic principle of Synthetic Aperture Radar (SAR). Matched filter approaches for processing the received data and pulse compression technique are presented. Besides the SAR radar equation, the linear frequency modulation (LFM) waveform and matched filter response are also discussed. Finally the system design consideration of various parameters and aspects are also highlighted.