检索结果-内蒙古大学图书馆

LLE-Fuse:Lightweight Infrared and Visible Light Image Fusion Based on Low-Light Image Enhancement

Computers, Materials & Continua 2025年第3期82卷 4069-4091页

作者： Song Qian Guzailinuer Yiming Ping Li Junfei Yang Yan Xue Shuping Zhang Faculty of Information Engineering Xinjiang Institute of TechnologyAksu843100China

Infrared and visible light image fusion technology integrates feature information from two different modalities into a fused image to obtain more comprehensive ***,in low-light scenarios,the illumination degradation of visible light images makes it difficult for existing fusion methods to extract texture detail information from the *** this time,relying solely on the target saliency information provided by infrared images is far from *** address this challenge,this paper proposes a lightweight infrared and visible light image fusion method based on low-light enhancement,named *** method is based on the improvement of the MobileOne Block,using the Edge-MobileOne Block embedded with the Sobel operator to perform feature extraction and downsampling on the source *** intermediate features at different scales obtained are then fused by a cross-modal attention fusion *** addition,the Contrast Limited Adaptive Histogram Equalization(CLAHE)algorithm is used for image enhancement of both infrared and visible light images,guiding the network model to learn low-light enhancement capabilities through enhancement *** completion of network training,the Edge-MobileOne Block is optimized into a direct connection structure similar to MobileNetV1 through structural reparameterization,effectively reducing computational resource ***,after extensive experimental comparisons,our method achieved improvements of 4.6%,40.5%,156.9%,9.2%,and 98.6%in the evaluation metrics Standard Deviation(SD),Visual Information Fidelity(VIF),Entropy(EN),and Spatial Frequency(SF),respectively,compared to the best results of the compared algorithms,while only being 1.5 ms/it slower in computation speed than the fastest method.

关键词： Infrared images image fusion low-light enhancement feature extraction computational resource optimization

来源：评论

学校读者我要写书评

暂无评论

Approximate Solutions of Hypersingular Integral Equations of the First Kind Using Chebyshev Polynomials of the Second Kind in Matrix-Vector Versions

引用

IAENG International Journal of Applied Mathematics 2025年第1期55卷 214-222页

作者： Shoukralla, E.S. Ahmed, B.M. Faculty of Electronic Engineering Menofia University Egypt Faculty of Engineering and Technology Future University in Egypt Cairo Egypt

In this study, we focus on obtaining approximate solutions to hypersingular Fredholm integral equations of the first kind that appear in water wave dynamics, elasticity, acoustics, fluid mechanics, and others. The proposed method is based on Chebyshev polynomials of the second kind in matrix-vector forms. The analytical method was used to remove the singularity of the unknown function, whereas the asymptotic recurrence formula was used to remove the singularity of the hypersingular integral. A matrix equation whose solution is equivalent to the solution of the integral equation was obtained. Without using the collocation approach, this equivalent matrix equation has been transformed into a linear system of algebraic equations. A square coefficient matrix necessary for the algebraic system's solution has been extracted from the matrix equation. The solutions to four examples with tables and figures were provided. As it turns out, the derived approximate vector-matrix polynomials solutions significantly converge to the exact ones. The absolute errors were uniform and symmetric, and they also demonstrated proximity to zero as the degree of approximation was increased. The presented method included only a few simple steps and was highly accurate and innovative. © (2025), (International Association of Engineers). All rights reserved.

关键词： Chebyshev polynomials

来源：评论

学校读者我要写书评

暂无评论

Performance Evaluation of an Underwater Remotely Operated Vehicle Based on Natural Frequency Analysis in Presence of Added Mass

引用

Journal of The Institution of Engineers (India): Series C 2025年第1期106卷 35-49页

作者： Ahmadi Jeyed, Ghadir Gandomkar, Mohammad Ahmadi Jeyed, Hamze Biglari, Hasan Faculty of Mechanical Engineering University of Tabriz Tabriz Iran Faculty of Mechanical Engineering Malek-Ashtar University of Technology Shahinshahr-Isfahan Iran Faculty of Mechanical Engineering Iran University of Science and Technology Tehran Iran

Nowadays, the Underwater Remotely Operated Vehicle (ROV) has captivated the interest of researchers, given its widespread applications in both military and marine industries. However, establishing a standardized model for use in challenging conditions, such as the presence of added mass, poses a significant challenge. The ROV serves a crucial role in oceanographic research, contributing to data collection, image recording, and deep-sea surveys. The development of a standard model holds promise for enabling researchers to design ROVs suitable for diverse tasks across varying ocean depths. In this study, for the first time, propose a natural frequency analysis of an ROV, considering added mass. Additionally, conduct a strength analysis for the ROV under critical boundary conditions, including displacement in a dry environment and Stuck in the sludge of the sea. The natural frequency analysis of the underwater environment, considering the acoustic properties of water fluid, is performed using ABAQUS software. The natural frequency of an object in water, indicating the frequency of vibrations per second, depends on factors such as temperature, pressure, and density of the surrounding water. This analysis, integral to structural dynamics, provides valuable insights into how vibrations propagate, facilitating the design of more stable structures. Furthermore, the study investigates the effects of added mass on different vibration modes of the ROV in the MATLAB Environment. Stress analysis results demonstrate that the ROV, submerged in critical boundary conditions due to hydrostatic forces, drag, and equipment weight, possesses sufficient strength for movement in deep-sea environments. Natural frequency analysis in water reveals a reduction in the impact of surrounding fluid and added mass in high-frequency modes. To enhance evaluations of fluid dynamics around the structure, fluid dimensions are considered until the structure’s frequency and resulting frequencies converge

关键词： ABAQUS

来源：评论

学校读者我要写书评

暂无评论

Effect of Rubber Sludge on the Physical and Mechanical Properties of Low Calcium Fly Ash-Based Geopolymer

引用

Archives of Metallurgy and Materials 2025年第1期70卷 399-403页

作者： Hoe-Woon, T. Cheng-Yong, H. Qi-Hwa, N. Abdullah, M.M.A.B. Jia-Ni, L. Shee-Ween, O. Wan-En, O. Yong-Jie, H. Kangar Perlis Malaysia Faculty of Mechanical Engineering & Technology Arau Perlis Malaysia Faculty of Chemical Engineering & Technology Arau Perlis Malaysia

In this research, experimental work has been carried out to check the feasibility of using rubber sludge (RS) to partially replace fly ash (FA) in the production of geopolymer. RS is employed in this study as disposing of RS has led to an issue and is abundant, especially in countries producing rubber products. RS is classified as hazardous waste. Improper awareness on hazardous waste handling can spread a variety of diseases. Therefore, handling of hazardous waste is not easy as competent personnel is required during the collection, transportation, treatment and final disposal. As a result, the cost of disposing the hazardous waste are relatively high. With that, FA incorporated RS geopolymer will able to solve the landfill problems and used it as building materials will save costs, preserve natural resources, and protect the environment from waste impact and hazards. In this study, the physical and mechanical properties were investigated. It was used to replace fly ash at 5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.%. Water absorption, apparent porosity, bulk density, and compressive strength were tested. The test result shows that 5 wt.% of RS incorporation to fly ash-based geopolymer is optimum as it has 1752 kg/m3 of density, 9.5% of water absorption, 19.2% of apparent porosity, and 49.9 MPa of compressive strength. © 2025. The Author(s).

关键词： Fly ash

来源：评论

学校读者我要写书评

暂无评论

PHYSICAL, MECHANICAL AND MICROSTRUCTURE PROPERTIES OF METAKAOLIN BASED POROUS ALKALI ACTIVATED MATERIALS AS AN ADSORBENT FOR CU(II) ION REMOVAL

引用

Archives of Metallurgy and Materials 2025年第1期70卷 453-460页

作者： Wan Ibrahim, W.M. Al Bakri Abdullah, M.M. Romisuhani, A. Masdiyana, I. FACULTY OF MECHANICAL ENGINEERING AND TECHNOLOGY ARAU PERLIS02600 Malaysia PERLIS01000 Malaysia FACULTY OF CHEMICAL ENGINEERING AND TECHNOLOGY ARAU PERLIS02600 Malaysia

This study investigates the physical, mechanical, and microstructure properties of metakaolin-based porous alkali activated materials (AAM) at different surfactant concentrations as an adsorbent for Cu(II) ion removal. The AAM were synthesized using metakaolin as a precursor and alkali activators. Different surfactant contents ranging from 1 wt.% to 5 wt.% were incorporated into the AAM to enhance their adsorption capacity. The physical properties of the AAM were evaluated by determining their porosity, water absorption and density. The results showed that adding surfactant increased the AAM porosity, leading to higher water absorption. The highest porosity was observed at 3 wt.% surfactant content, indicating the optimal surfactant concentration for promoting a porous structure. The mechanical properties of the AAM were assessed through compressive strength tests. The microstructure analysis using scanning electron microscopy revealed that the AAM exhibited different microstructures depending on the surfactant content. The adsorption capacity and removal efficiency of the AAM for Cu(II) ion removal were determined. With a maximum adsorption capacity of 64.78 mg/g, the porous AAM could adsorb a significant Tuantity of Cu(II) ions. The outstanding removal efficiency of 97.17% showed the AAM maximum efficiency in removing Cu(II) ions from the solution at an adsorption condition of 25℃, pH 5, an initial concentration at 100 ppm and 60 minutes contact time. © 2025. The Author(s).

关键词： Compressive strength

来源：评论

学校读者我要写书评

暂无评论

Suppressing the oxygen-ionic conductivity and promoting the phase stability of the high-entropy rare earth niobates via Ta substitution

引用

材料科学技术（英文版） 2025年第6期209卷 79-94页

作者： Mengdi Gan Liping Lai Jiankun Wang Jun Wang Lin Chen Jingjin He Jing Feng Xiaoyu Chong Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093PR China

Improving and optimizing the target properties of ceramics via the high entropy strategy has attracted significant *** earth niobate is a potential thermal barrier coating(TBCs)material,but its poor high-temperature phase stability limits its further *** this work,four sets of TBCs high-entropy ceramics,(Sm1/5Dy1/5Ho1/5Er1/5Yb1/5)(Nb1/2Ta1/2)O4(5NbTa),(Sm1/6Dy1/6Ho1/6Er1/6Yb1/6Lu1/6)(Nb1/2Ta1/2)O4(6NbTa),(Sm1/7Gd1/7Dy1/7Ho1/7Er1/7Yb1/7Lu1/7)(Nb1/2Ta1/2)O4(7NbTa),(Sm1/8Gd1/8Dy1/8 Ho1/8Er1/8Tm1/8Yb1/8Lu1/8)(Nb1/2Ta1/2)O4(8NbTa)are synthesized using a solid-state reaction method at 1650 ℃ for 6 ***,the X-ray diffractometer(XRD)patterns display that the samples are all single-phase solid solution structures(space group C2/c).Differential scanning calorimetry(DSC)and the high-temperature XRD of 8NbTa cross-check that the addition of Ta element in 8HERN increases the phase transition temperature above 1400 ℃,which can be attributed to that the Ta/Nb co-doping at B site introduces the fluctuation of the bond strength of Ta-O and ***,compared to high-entropy rare-earth niobates,the introduction of Ta atoms at B site substantially reduce thermal conductivity(re-duced by 44％,800 ℃)with the seven components high entropy ceramic as an *** low thermal conductivity means strong phonon scattering,which may originate from the softening acoustic mode and flattened phonon dispersion in 5-8 principal element high entropy rare earth niobium tantalates(5-8NbTa)revealed by the first-principles ***,the Ta/Nb co-doping in 5-8NbTa systems can further optimize the insulation performance of oxygen *** oxygen-ion conductivity of 8NbTa(3.31 × 10-6 S cm-1,900 ℃)is about 5 times lower than that of 8HERN(15.8 × 10-6 S cm-1,900 ℃)because of the sluggish diffusion effect,providing better oxygen barrier capacity in 5-8NbTa systems to inhibit the overgrowth of the thermal growth oxide(TGO)of *** addition,influenced by lattice dis-

关键词： Thermal barrier coating(TBCs) High-entropy rare earth oxides(HEOs) High-temperature phase stability Oxygen-ionic conductivity Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Electric Field Effect on the Dielectric Properties of Insulating Materials Destined for Medium Voltage Cable Insulation

EEA - Electrotehnica, Electronica, Automatica

引用

EEA - Electrotehnica, Electronica, Automatica 2025年第1期73卷 62-69页

作者： Larba, Mohamed Medjdoub, Abdallah Electrical Engineering Department Faculty of Technology University of Bejaia Algeria

The predominant use of cross-linked polyethylene (XLPE) in the insulation of medium and high voltage cables is attributed to its excellent electrical, thermal and mechanical properties. However, this insulation can undergo crucial damage under various constraints, including electrical stress. The main objective of this work is to analyze the influence of electrical aging on the dielectric characteristics, such as the relative permittivity, the dielectric loss factor and the loss index of the XLPE. Furthermore, an optical scanning electron microscope (SEM) is studied to visualize the surface condition of the solid insulator. Spectroscopic analysis Fourier Transform Infrared Spectroscopy is also presented in this work. The results obtained show that the electric field causes the degradation of the XLPE dielectric characteristics. © Editura ELECTRA 2025. All rights reserved.

关键词： Fourier transform infrared spectroscopy

来源：评论

学校读者我要写书评

暂无评论

A hybrid meta-heuristic algorithm for optimization of capuchin search algorithm for high-dimensional biological data classification

引用

Neural Computing and Applications 2025年第7期37卷 5719-5750页

作者： Jaber, Iyad Hassouneh, Yousef Khemaja, Maha Birzeit University Faculty of Engineering and Technology Palestine Birzeit Palestine

Feature selection (FS) is a preprocessing technique that diminishes redundant and non-informative features to enhance data classification methods. This technique has gained global significance with the expansion of real-world data, particularly high-dimensional biological datasets. This study introduces a distinctive wrapper-based FS model, built upon the capuchin search algorithm (CapSA). CapSA is a recent swarm intelligence algorithm inspired by the foraging behaviors of Capuchin monkeys. Despite the strengths of the standard CapSA, it has notable limitations that this paper aims to address through purposeful modifications to the algorithm. These modifications include incorporating genetic algorithm operators (crossover and mutation), a dynamic mechanism for determining the number of leaders, and incorporating adaptive inertia weight. The proposed enhanced variant, named CapSA-CM, aims to achieve a more effective balance between the exploration and exploitation phases of the algorithm. The proposed methods are assessed using high-dimensional, low-sample biological datasets. The CapSA-CM approach is validated by comparing its efficacy with basic and hybrid meta-heuristic algorithms. Statistical analysis demonstrates the superiority of the CapSA-CM in terms of feature reduction, accuracy rates, and fitness values compared to the original CapSA and other comparable algorithms. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

MACROSEGREGATION OF CARBON IN HEAVY STEEL CASTING

引用

Archives of Metallurgy and Materials 2025年第1期70卷 285-290页

作者： Pernica, V. Záděra, A. Kaňa, V. Krutiš, V. Brno University of Technology Faculty of Mechanical Engineering Institute of Manufacturing Technology Department of Foundry Engineering Brno Czech Republic

Segregation of elements during solidification of massive steel castings and ingots is caused by their different solubility in the melt and in the newly formed solid phase. The macrosegregation of elements significantly affects the structure in terms of microstructure and macrostructure of the casting as well as on its mechanical and operational properties. This paper deals with the evaluation of macrosegregation of selected elements on a real cross-section of a heavy experimental carbon steel casting. Macrosegregation of elements was determined by spectral analysis at selected locations and compared with the ProCAST software and its results of casting solidification simulation. The macrosegregation was analysed along the height and width of a cross-section of the casting, which measured approximately 1800×600×100 mm. Over 300 points were analysed in this area of the casting. The results present mainly carbon segregation. The carbon segregation is compared to the solidification conditions expressed by the cooling rate and the time between the liquidus and solidus temperatures (mushy zone). The aim of this paper was also to verify the measured results with those calculated using commercial software. In conclusion, the measured macrosegregation of the carbon in the casting is different from the simulated macrosegregation, this fact is not negligible. The difference in measured carbon content is influenced by solidification kinetics and will significantly affect the material properties. © 2025. The Author(s).

关键词： Steel ingots

来源：评论

学校读者我要写书评

暂无评论

Eco-Friendly Materials for Temporary Use in Architecture and Decorations

HighTech and Innovation Journal

引用

HighTech and Innovation Journal 2025年第1期6卷 81-90页

作者： Poomchalit, Walanrak Tipboonsri, Ponlapath Chongkolnee, Boonsong Pramoonmak, Supaaek Cheewawuttipong, Watthanaphon Memon, Anin Faculty of Architecture Rajamangala University of Technology Thanyaburi Pathum Thani 12110 Thailand Faculty of Engineering Rajamangala University of Technology Thanyaburi Pathum Thani 12110 Thailand Faculty of Engineering Rajamangala University of Technology Srivijaya Songkhla90000 Thailand

This paper introduces the development of ecologically friendly composite materials for decoration and architectural purposes. The composites designed comprised degradable polylactic acid (PLA) and sugarcane bagasse fiber (SC) derived from the bioplastics and sugar industries. The SC reinforcement was examined for impurity treatment and composite formation using hot compression molding at 200 ± 10°C. Two processing methods were studied: (1) random dispersion of SC at 0, 2, 4, 6, 8, and 10 wt%, and (2) single and double-layer SC composite sheets made with 6 wt% SC. The physical and mechanical properties of the PLA-SC composites were evaluated through the morphologies and flexural properties (ASTM C293), thermal conductivity (ASTM C518), and biodegradation assessment (ISO 16929:2021). Results revealed that impurities in SC were effectively removed using an alkaline sodium bicarbonate solution followed by boiling in a 5% vinegar solution. Increasing SC contents reduced the weight, density, and thermal conductivity (k-value) of the PLA-SC composites compared to those representing single and double layers of SC. Additionally, this approach enhanced the flexural properties of the composites. Random dispersion with 10 wt% treated SC yielded the best results among the tested methods, making it the optimal approach for sustainable decoration and architectural materials. © Authors.

关键词： Sugar industry

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：