Cuckoo Search Based Backcalculation Algorithm for Estimating Layer Properties of Full-Depth Flexible Pavements

Öcal, Arda; Pekcan, Onur

doi:10.1007/978-981-15-5163-5_10

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…In this study, images will be enhanced using negative image techniques, bright contrast stretching, dark contrast stretching, and partial contrast stretching, and optimized with Cuckoo search (CS). The purpose of this optimization is to improve the performance of the image enhancement function and enable the function to work optimally or within the limits set by the user to produce the desired results [26], [27]. In [28], Genetic algorithms have been used to solve most of the problems of human judgment and have demonstrated increased capability of additional image-altering functions.…”

Section: Fig 1 Llustrates a Normal Retina And Diabetic Retinamentioning

confidence: 99%

Optimization Of Histogram Equation With The Cukcoo Algorithm to Improve Fundus Image Quatlity

Toresa,

Anggraini,

Pratama Putra

et al. 2023

CoreIT

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This study discusses strategies for identifying Diabetic Retinopathy (DR) using fundus images and the efficiency of image pre-processing techniques to improve their quality. Fundus images in medical image processing often experience problems with non-uniform lighting, low contrast, and noise, thus requiring pre-processing of images to improve their quality. This study evaluates the effectiveness of standard histogram equation techniques and optimized histogram equations with cukkoo optimization in order to choose the best technique to improve fundus image quality to identify DR. The proposed technique to produce better image quality improvements will be tested in several performance metrics, such as NIQE, PSNR, and Entropy. the results of this study, the average PNSR before optimization was 50,8, whereas after optimization it became 49,8239. The average entropy before optimization is 4.5514, while after optimization it becomes 3.8577. The average NIQE before optimization was 3,4046, while after optimization it was 4,73. In general, the results of this study indicate that the quality of the fundus image is better using the histogram equation before optimization than after optimization. In other words, Cukcoo optimization is not suitable for increasing the performance of the histogram equation in improving fundus image quality

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Section: Fig 1 Llustrates a Normal Retina And Diabetic Retinamentioning

confidence: 99%

Optimization Of Histogram Equation With The Cukcoo Algorithm to Improve Fundus Image Quatlity

Toresa,

Anggraini,

Pratama Putra

et al. 2023

CoreIT

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“…Valli et al [16] discussed the effects of natural rubber, carbon black and copper slag in flexible base structures and determined that adding natural rubber in flexible materials could strengthen vibration absorption performances of the structural layer, adding copper slag could improve the mechanical properties of the mixture, and adding carbon black could improve the tear strength, conductivity and elasticity of asphalt. Öcal et al [17] proposed an antiinference method that combined the neural network computation method to estimate the material properties of flexible asphalt pavement and brought finite element software simulation results and field test data into the analysis. Results demonstrated that the proposed antiinference method could determine the properties of materials accurately and quickly.…”

Section: State Of the Artmentioning

confidence: 99%

Research on Bending Fatigue Properties of Reinforced Macadam Foundation

Jing¹,

Gou²,

Song³

2021

Teh. vjesn.

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Existing macadam base structures have poor resistance to bending deformation of pavement. The structural layer is challenged with serious cracking due to the long-term dynamic loads. Despite these issues, however, studies on reinforcement techniques for macadam base structure have been scarce. No reasonable and feasible method on how to improve the bending resistance of flexible base structures (e.g. macadam base structure) and prolong their bending fatigue life has yet been reported. Thus, this study proposed a method for reinforcing macadam base structures with geogrids to strengthen bending performance, anti-fatigue performance and dynamic stability of flexible base structures under different loading levels. The reinforced macadam base structure was investigated through a laboratory test of flexural-tensile strength and a three-point fatigue bending test. A cyclic loading test of reinforced and non-reinforced girder specimens was carried out under five stress levels. The effect of such a new reinforcement method in improving the bending fatigue properties of macadam base structures was analyzed by comparing the yield curves and fatigue lives of reinforced and non-reinforced specimens under different loading levels. Results demonstrate that the non-reinforced macadam base has poor bending resistance. The yield curve and fatigue life of non-reinforced specimens attenuated quickly as it approached the ultimate loading level. Non-reinforced specimens have low-cycle fatigue failures when the loads reach the 0.8 stress level and the ultimate displacement at failure is relatively small, accompanied by obvious failure surface. After geogrids are added, the fatigue life of specimens improved significantly. The yield curve shows no significant attenuation at a high loading level. The reinforced specimens can still maintain high-cycle fatigue failure under the 0.8 stress level and avoid the occurrence of low-cycle fatigue failures. Moreover, reinforced specimens can inhibit transmission of reflection cracks at midspan of cement-stabilized macadam base, delay the propagation of oblique shearing fractures close to the support, and strengthen the dynamic stability and durability of pavement structure with a macadam base. The conclusions of this study provide theoretical references to practical engineering applications of such new reinforcement technology for macadam bases.

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Prediction of back-calculated layer moduli using cuckoo search algorithm for pavement asset management at a network level

Chundi

Raju

Kota

et al. 2021

Innov. Infrastruct. Solut.

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Cuckoo Search Based Backcalculation Algorithm for Estimating Layer Properties of Full-Depth Flexible Pavements

Cited by 4 publications

References 41 publications

Optimization Of Histogram Equation With The Cukcoo Algorithm to Improve Fundus Image Quatlity

Optimization Of Histogram Equation With The Cukcoo Algorithm to Improve Fundus Image Quatlity

Research on Bending Fatigue Properties of Reinforced Macadam Foundation

Prediction of back-calculated layer moduli using cuckoo search algorithm for pavement asset management at a network level

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