Sh. B. Utamuradova^a, F. A. Giyasova^b, M. S. Paizullakhanov^c, S. Yu. Gerasimenko^d, M. A. Yuldoshev^e,g,*, S. R. Boydedayev^g, M. R. Bekchanova^h

Chalcogenide Letters, Vol.22, No.8, pp. 753-764, 2025, DOI:10.15251/CL.2025.228.753

Abstract Based on the experimental data, the results of the study of photoelectric and gain characteristics of modified multi-barrier photodiode Au-nCdS-nSi-pCdTe-Au structures are presented, which are obtained by the method of vacuum evaporation in a quasi-closed volume by sputtering cadmium sulfide and cadmium telluride layers on a silicon substrate with a specific resistance of 607.47 Ohm⋅cm. It is shown that the structures in the passing direction of the current at low illumination levels operate as injection photodiodes, and also the optical spectral range (0.3÷0.95 μm) covers from the nSi-pCdTe-Au side and (1.0÷1.4 μm) from the Au-nCdS-nSi More >

Shuai Zhang¹, Xin Lai^1,*, Haiyan Niu², Lisheng Liu^1,3, Shifu Wang², Jinyong Zhang³

CMES-Computer Modeling in Engineering & Sciences, Vol.144, No.1, pp. 739-762, 2025, DOI:10.32604/cmes.2025.067442 - 31 July 2025

Abstract This study investigates the dynamic compressive behavior of three periodic lattice structures fabricated from Ti-6Al-4V titanium alloy, each with distinct topologies: simple cubic (SC), body-centered cubic (BCC), and face-centered cubic (FCC). Dynamic compression experiments were conducted using a Split Hopkinson Pressure Bar (SHPB) system, complemented by high-speed imaging to capture real-time deformation and failure mechanisms under impact loading. The influence of cell topology, relative density, and strain rate on dynamic mechanical properties, failure behavior, and stress wave propagation was systematically examined. Finite element modeling was performed, and the simulated results showed good agreement with experimental… More >

A. Robert Singh¹, Suganya Athisayamani², Gyanendra Prasad Joshi³, Bhanu Shrestha^4,*

CMES-Computer Modeling in Engineering & Sciences, Vol.142, No.1, pp. 299-327, 2025, DOI:10.32604/cmes.2024.055599 - 17 December 2024

Abstract Myocardial perfusion imaging (MPI), which uses single-photon emission computed tomography (SPECT), is a well-known estimating tool for medical diagnosis, employing the classification of images to show situations in coronary artery disease (CAD). The automatic classification of SPECT images for different techniques has achieved near-optimal accuracy when using convolutional neural networks (CNNs). This paper uses a SPECT classification framework with three steps: 1) Image denoising, 2) Attenuation correction, and 3) Image classification. Image denoising is done by a U-Net architecture that ensures effective image denoising. Attenuation correction is implemented by a convolution neural network model that… More >

L. Alelyani^a, T. A. Ghaw^b,*, N. A. Asiri^b, N. A. Abdullah^b, K. I. Hussein^b, M. S. Alqahtani^b

Chalcogenide Letters, Vol.21, No.4, pp. 319-326, 2024, DOI:10.15251/CL.2024.214.319

Abstract This paper presents a novel low-cost phosphate glass preparation by using the melt quenching technique. It was investigated for use in diagnostic protective applications. The range of UV-VIS wavelength is used to estimate the optical energy gap. The MAC denotes the mass attenuation coefficients of the present glass were computed at low photon energies between 15 and 200 KeV using the MIKE program. The manufactured glasses parameters viz; the mean free path, half value layer, tenth value layer, effective atomic number, effective electron density, and linear attenuation coefficient denotes as follows; MFP, HVL, TVL, Z_eff, N_eff, More >

Lichao Zhang¹, Zhao Zhang^1,*

The International Conference on Computational & Experimental Engineering and Sciences, Vol.29, No.3, pp. 1-1, 2024, DOI:10.32604/icces.2024.012849

Abstract Powder flow can affect the temperature variations in directed energy deposition (DED). However, the direct coupling mechanism remains unknown. To solve this problem, the heat and mass transfer in additive manufacturing was simulated using dynamic coupling. The interactions between the multiphase flow and heat transfer were established. A comparison with experiment shows that the accuracy of the predictions of the numerical simulation regarding powder size distributions and temperature increases is higher than 95%. The average temperature increase of the metal powders with different weight functions was highly consistent in the simulation process. As the powder More >

Junhui Li¹, Haotian Zhang¹, Cuiping Li^1,*, Xingxu Zhu¹, Ruitong Liu², Fangwei Duan², Yongming Peng³

Energy Engineering, Vol.121, No.2, pp. 291-313, 2024, DOI:10.32604/ee.2023.027593 - 25 January 2024

Abstract In the existing power system with a large-scale hydrogen storage system, there are problems such as low efficiency of electric-hydrogen-electricity conversion and single modeling of the hydrogen storage system. In order to improve the hydrogen utilization rate of hydrogen storage system in the process of participating in the power grid operation, and speed up the process of electric-hydrogen-electricity conversion. This article provides a detailed introduction to the mathematical and electrical models of various components of the hydrogen storage unit, and also establishes a charging and discharging efficiency model that considers the temperature and internal gas… More >

JINFANG HU^1,#, JIANGEN AO^2,#, LONGSHENG FU^1,#, YAOQI WU¹, FENG SHAO³, TIANTIAN XU¹, MINGJIN JIANG⁴, SHAOFENG XIONG¹, YANNI LV^1,*

BIOCELL, Vol.47, No.7, pp. 1611-1622, 2023, DOI:10.32604/biocell.2023.028684 - 21 June 2023

Abstract Background: The attenuation function of Dalbergia odorifera leaves on cerebral ischemia-reperfusion (I/R) is little known. The candidate targets for the Chinese herb were extracted from brain tissues through the high-affinity chromatography. The molecular mechanism of D. odorifera leaves on cerebral I/R was investigated. Methods: Serial affinity chromatography based on D. odorifera leaves extract (DLE) affinity matrices were applied to find specific binding proteins in the brain tissues implemented on C57BL/6 mice by intraluminal middle cerebral artery occlusion for 1 h and reperfusion for 24 h. Specific binding proteins were subjected to mass-spectrometry to search for the differentially expressed… More >

Wei Jiang^1,2,*, Zelin Cao^3,4

Structural Durability & Health Monitoring, Vol.17, No.1, pp. 37-54, 2023, DOI:10.32604/sdhm.2022.013444 - 02 March 2023

Abstract The attenuation relationship of ground motion based on seismology has always been a front subject of engineering earthquake. Among them, the regional finite-fault source model is very important. In view of this point, the general characteristics of regional seism-tectonics, including the dip and depth of the fault plane, are emphasized. According to the statistics of regional seism-tectonics and focal mechanisms in Sichuan, China, and the sensitivity of estimated peak ground acceleration (PGA) attenuation is analyzed, and the dip angle is taken as an average of 70°. Based the statistics of the upper crustal structure and… More >

R. Vijay Anandh^1,*, S. Rukmani Devi²

Computer Systems Science and Engineering, Vol.44, No.3, pp. 1897-1910, 2023, DOI:10.32604/csse.2023.027187 - 01 August 2022

Abstract The demand for the exploration of ocean resources is increasing exponentially. Underwater image data plays a significant role in many research areas. Despite this, the visual quality of underwater images is degraded because of two main factors namely, backscattering and attenuation. Therefore, visual enhancement has become an essential process to recover the required data from the images. Many algorithms had been proposed in a decade for improving the quality of images. This paper aims to propose a single image enhancement technique without the use of any external datasets. For that, the degraded images are subjected… More >

Amanda E. Kahn¹, Steven J. Lomax¹, Essa M. Bajalia¹, Colleen T. Ball², David D. Thiel¹

Canadian Journal of Urology, Vol.27, No.4, pp. 10278-10284, 2020

Abstract Introduction: To evaluate the utility of the Aorta-Lesion-Attenuation-Difference (ALAD) and Peak Early-phase Enhancement Ratio (PEER) on contrast-enhanced computed tomography (CT) to differentiate between the appearances of chromophobe renal cell carcinoma, clear cell renal cell carcinoma, and oncocytoma.
Materials and methods: ALAD and PEER values were retrospectively measured by a reviewer from 119 patients with surgically resected renal masses (chromophobe renal cell carcinoma n = 29, clear cell renal cell carcinoma n = 28, and oncocytoma n = 62). The ALAD value is expressed as: ALAD = Hounsfield Units aorta – Hounsfield Units mass. PEER is expressed as… More >