Article
Computer Science, Artificial Intelligence
Madad Khan, Inamullah Khan, Aliya Fahmi, Saima Anis, Sohail Iqbal
Summary: In this paper, we introduced new operations and formulas of set theory for complex fuzzy sets (CFSs) and presented their basic results and examples. Additionally, we proposed an algorithm to identify a reference signal out of a large number of signals, enabling faster measurement of signal values using CFSs.
Article
Mathematics, Applied
Pavle Saksida
Summary: This paper studies two discretisations, F-E and F-D, of the nonlinear Fourier transform of AKNS-ZS type. Recursive algorithms for inverses of these two transformations are constructed, with the algorithm for (F-D)(-1) being more demanding than that for (F-E)(-1) in terms of numerical calculations. An important symmetry property of F-D is described, enabling the reduction of the nonlinear Fourier analysis of constant mass distributions to the numerically more efficient F-E and its inverse.
Article
Engineering, Chemical
Haoran Zhou, Qingshan Meng, Qinglong Qin, Kai Wu, Youkou Dong
Summary: A systematic method is proposed to generate nonstar-like particles satisfying target shape descriptors. By utilizing complex functions and correlation analysis, the method successfully generates particles randomly, and its efficiency and stability are proven through tests.
Article
Materials Science, Multidisciplinary
Yizhe Liu, Yuli Chen, Bin Ding
Summary: In this paper, a novel method of deep learning in frequency domain is proposed to solve the inverse identification of nonhomogeneous material properties. The method combines discrete cosine transform and convolutional neural network to achieve rapid and robust matchup between measured displacement/strain fields and randomly distributed modulus field. Experimental results show that the method has high prediction accuracy and robustness to noise, and can handle arbitrary levels of noise with a single training. The method also exhibits great generalization to neighbor sampling spaces with different sampling points.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Construction & Building Technology
Xiang Wang, Zhen-yu Yin, Jun-qi Zhang, Hao Xiong, Dong Su
Summary: The study aims to generate three-dimensional models of stone-based materials with controllable stone-inclusion geometries using the SHT method and IMC algorithm. An overlapping detection algorithm is proposed to quantitatively control the geometrical features of the stones, paving the way for stochastic modeling in construction and manufacture processes.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Luan Portella, Diego F. G. Coelho, Fabio M. Bayer, Arjuna Madanayake, Renato J. Cintra
Summary: This article presents a variant of transform scaling method to obtain DFT approximations of large blocksize. The proposed method scales up a given transformation successively, leading to different sizes of transformations. The authors fully introduce a 32(4)-point DFT approximation and provide a fast algorithm, arithmetic complexity assessment, and error analysis.
IEEE SIGNAL PROCESSING LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Yu Liu, Feng Zhang, Hongxia Miao, Ran Tao
Summary: This paper introduces the sliding window algorithm for real-time calculation of fractional Fourier transform, proposing the hopping DFrFT algorithm and methods applied in DTFrFT and DFrCT/DFrST/DFrHT. Simulation results confirm that the sliding algorithm can reduce computation complexity without degrading precision.
Article
Acoustics
Euschi Salah, Khaldi Amine, Kafi Redouane, Kahlessenane Fares
Summary: This paper presents two new substitution schemes for digital audio watermarking based on Fourier transform, demonstrating good imperceptibility and high-quality watermark robust against various attacks in the frequency domain, but with reduced capacity when using small audio files in experiments.
Article
Multidisciplinary Sciences
Lianheng Zhao, Zijian Zhang, Shuguang Wang, Nan Qiao, Guoshun Lv
Summary: This study investigates the instability characteristics of large deformation in boulder slopes with varying boulder shapes, which provides a reference for the stability assessment of solitary boulder slopes.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Mathematics, Applied
Alexandr Ovanesovich Vatulyan, Victor Olegovich Yurov
Summary: The study presents a scheme for solving the inverse problem of reconstructing the radial change in the Lame parameters and density in a cylindrical waveguide, using displacement fields corresponding to different loading types as additional information. An iterative process and regularization method are used to recover the functions, with a series of computational experiments conducted to discuss the role of initial approximation and frequency range.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Deyun Wei, Jun Yang
Summary: The discrete fractional Fourier transform is a useful tool in non-stationary signal processing. This paper proposes a two-dimensional sparse fractional Fourier transform (2D SFRFT) algorithm, which achieves the lowest runtime and sample complexity compared to existing methods. The algorithm is improved to be robust by analyzing errors due to noises, and its effectiveness is demonstrated in various applications.
Article
Mathematics, Applied
Javier Morales-Castillo, Eva M. Morales-Rodriguez
Summary: This article presents a method to easily solve the Fourier and Laplace transforms and their inverses. A general formula is provided for integrals involving an exponential function multiplied by a derivable function. The methodology is presented step by step, and it can also be applied to solve problems involving the Normal, Gamma, and Beta distributions with mathematical artifices.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2023)
Article
Engineering, Electrical & Electronic
Deyun Wei, Jun Yang
Summary: A novel estimation algorithm is proposed for non-uniform discrete Fourier transform (NUDFT) in this paper, which achieves compression of sparse signals and accurate detection of frequencies.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Howard W. Levinson, Vadim A. Markel
Summary: This study investigates the reconstruction of a binary vector of known length N from a limited set of its discrete Fourier transform (DFT) coefficients. It is proven that a binary vector can be uniquely defined by its first two DFT coefficients if N is prime, and additional coefficients are required when N has two prime factors. In the presence of noise, more DFT coefficients may be needed for a stable and unique solution.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Engineering, Biomedical
S. Edward Jero, K. Divya Bharathi, P. A. Karthick, S. Ramakrishnan
Summary: This study successfully differentiated muscle nonfatigue and fatigue conditions using geometric features of sEMG signals, proposing a new framework and method for shape representation and geometric feature extraction. The results demonstrated the effectiveness of extracting geometric features in detecting muscle fatigue state.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Engineering, Geological
Xiang Wang, Zhen-Yu Yin, Dong Su, Xiaoxin Wu, Jidong Zhao
Summary: This study introduces a novel computational-geometry-based approach for generating random packing of complex-shaped 3D particles with quantitatively controlled sizes and shapes. The proposed method involves five essential steps and demonstrates the ability to generate granular particles with desired geometric properties and packing through various examples. This paves a viable pathway for realistic modeling of granular media in engineering and industrial processes.
Article
Materials Science, Multidisciplinary
Shunkai Liu, Wei Hu, Jian Gong, Zhihong Nie
Summary: The mixing degree of binary geotechnical mixtures has a significant impact on their strength. By proposing an improved index and conducting physical experiments and numerical simulations, it is found that increasing the mixing degree enhances the shear strength of binary geotechnical mixtures. The microscopic mechanism analysis reveals that the anisotropy of normal contact forces and the increased number of coarse-fine contacts contribute to the increase in shear strength.
Article
Green & Sustainable Science & Technology
Jun-Qi Zhang, Xiang Wang, Zhen-Yu Yin, Ningyu Yang
Summary: The stock of disposable face masks has been increasing steadily due to COVID-19, resulting in an urgent global environmental problem. This study evaluates the potential of using waste mask chips (MC) as reinforcement in granular soil through experimental tests. The results show that the addition of mask chips can increase shear strength, reduce volumetric dilation, and increase energy absorption, without affecting cumulative strain.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Yuexiang Lin, Xiang Wang, Jianjun Ma, Linchong Huang
Summary: A systematic three-dimensional finite-discrete approach is proposed to simulate a binary mixture of geomaterials with realistic irregular blocks and cohesive block-matrix interfaces. The model shows great potential for addressing heterogeneous binary mixtures of geomaterials by maintaining the characteristics of both continuity and discontinuity.
Article
Materials Science, Multidisciplinary
Chuanfeng Fang, Jian Gong, Mingtao Jia, Zhihong Nie, Bo Li, Ashiru Mohammed
Summary: This study investigated the effect of particle shape on the shear behavior of breakable granular materials using the DEM. The findings revealed the dependence of the macroscopic and microscopic shear behaviors on elongation and flatness, providing insights into the mechanical behavior of granular materials.
Article
Engineering, Geological
Chuanfeng Fang, Jian Gong, Mingtao Jia, Zhihong Nie, Wei Hu, Bo Li
Summary: This study investigated the effect of intermediate principal stress on the mechanical behavior of breakable granular materials using a DEM simulation. The results showed that increasing the intermediate principal stress initially increased and then decreased the peak shear strength, while also increasing particle breakage and the number of cracks.
Article
Green & Sustainable Science & Technology
Muhammad Hamza, Zhihong Nie, Mubashir Aziz, Nauman Ijaz, Zain Ijaz, Zia ur Rehman
Summary: This article presents a comprehensive study on the efficacy of xanthan gum as a green construction material in treating problematic weak subgrade soil. The results showed that at an optimum XG content of 1.5%, the strength parameters of the treated soil significantly increased, while the compression and rebound indices and swell percentage decreased.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2022)
Article
Construction & Building Technology
Muhammad Hamza, Zhihong Nie, Mubashir Aziz, Nauman Ijaz, Muhammad Faizan Ameer, Zain Ijaz
Summary: This article presents a comprehensive study on the efficacy of xanthan gum as a green construction material in treating problematic expansive subgrade. The results showed a reduction in soil plasticity with the increase in xanthan gum content and aging period. At 1.5% xanthan gum content, the treated soil exhibited significantly improved strength. Microstructural studies indicated that the bridging of soil particles with xanthan gum-hydrogel formation contributed to strength development.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Muhammad Hamza, Zhihong Nie, Mubashir Aziz, Nauman Ijaz, Chuanfeng Fang, Muhammad Usman Ghani, Zain Ijaz, Sadaf Noshin, Muhammad Salman
Summary: This article presents a comprehensive study on the geotechnical behavior of problematic expansive subgrade stabilized by guar gum (GG) biopolymer. The results show that GG treatment increases soil consistency and optimum moisture content, whereas the maximum dry density decreases. The GG treatment provides a green sustainable approach to mitigate the adverse expansive subgrade problems.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Environmental Sciences
Muhammad Hamza, Zhihong Nie, Mubashir Aziz, Nauman Ijaz, Osama Akram, Chuanfeng Fang, Muhammad Usman Ghani, Zain Ijaz, Sadaf Noshin, Muhammad Faizan Madni
Summary: This study investigates the use of xanthan gum (XG) biopolymer to improve the strength and durability of high plastic soil. Results show that 1.5% XG content greatly enhances the compressive strength, reduces compression and rebound indices, and decreases soil swell potential parameters. In addition, the hydraulic conductivity and freeze-thaw durability of the treated soil are greatly improved with increased XG content. Therefore, XG biopolymer has promising potential as an alternative admixture for treating high plastic soils.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Lianheng Zhao, Min Deng, Shuaihao Zhang, Dongliang Huang, Nan Qiao, Jian Gong
Summary: This paper investigates the influence of particle shape on the mechanical behavior of granular materials using DEM modeling. Realistic ballast particles were scanned and their M-values were calculated. The relationship between M-values and macro and micro mechanical behaviors was analyzed.
Article
Engineering, Chemical
Zhaohua Sun, Lei Lu, Jian Gong, Guowei Wei, Wenfeng Ye
Summary: The strength of clay soil is a critical concern in engineering design. Electroosmosis (EO) has been used to increase the strength of soft clay. This study evaluated the behavior of EO-treated soft clay under water immersion compared to vacuum preloading (VP) treated soft clay. The findings showed that EO-treated soil offered more resistance to changes in water content than VP-treated soil. The immersion time significantly affected the shear strength of EO-treated soil, while it had little influence on VP-treated soil. This highlights the need for reappraisal of the shear strength of EO-treated soft clays subjected to short-term water immersion.
Article
Environmental Sciences
Zhaohua Sun, Wanxia Tan, Jian Gong, Guowei Wei
Summary: This study investigated a new electrolyte chamber configuration to reduce electrolyte leakage and secondary pollution in electrokinetic remediation of heavy-metal-contaminated fine-grained soil. Experiments on clay spiked with Zn showed that the electrolyte chamber situated above the soil surface is promising for Zn-contaminated clay remediation. Using 0.2 M citric acid as electrolyte resulted in uniform removal efficiency of Zn and a sustained water content of approximately 43% in the soil.
Article
Engineering, Geological
Shaokun Ma, Haijun Huang, Fapai Tian, Zhibo Duan, Jian Gong, Jiabing Zhang
Summary: This study conducted a series of saturated undrained dynamic triaxial tests to investigate the dynamic characteristics and cumulative plastic strain evolution of clay-fouled round gravel under cyclic subway loading. The effects of clay fouling level, confining pressure, and dynamic stress amplitude on dynamic properties and cumulative plastic strain were analyzed. A cumulative plastic strain prediction model was proposed. The results of this study can be used for designing subway roadbed structures and predicting post-construction settlement.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Proceedings Paper
Engineering, Civil
Lianheng Zhao, Dongliang Huang, Shuaihao Zhang, Xiang Wang, Yingbin Zhang, Shi Zuo
Summary: This paper presents a novel method based on discrete cosine transform theory to analyze the 3D geometrical characteristics of rock joints. The proposed method is validated through experiments and provides insights into field identification of discontinuities and virtual test samples for numerical modeling.
ADVANCES IN TRANSPORTATION GEOTECHNICS IV, VOL 3
(2022)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
