检索结果-内蒙古大学图书馆

STRUCTURAL ASSESSMENT OF COMPOSITE HIGHWAY BRIDGES CONSIDERING VEHICLE-BRIDGE DYNAMIC INTERACTION

ce/papers 2024年第1-2期7卷 165-174页

作者： da Silva, Ana Célia Soares Alencar, Guilherme Santana da Silva, José Guilherme Santos Civil Engineering Post-graduate Program [PGECIV/UERJ Brazil Brazil Brazil

Over time, as the bridge deck pavement deterioration process increases, the calculated vertical translational displacements and stresses are higher. In this context, the chances of mechanical failure occurrence increase and may cause limitation in the service life of steel and composite (steel-concrete) bridges. Thus, the current work presents a methodology for fatigue analysis developed by the authors through the years. The methodology is devoted specifically for the assessment of composite bridges employing the hot-spot local S-N approach and a coupled vehicle-pavement-bridge system considering progressive pavement deterioration with stochastically generated roughness profiles. © 2024 Ernst & Sohn GmbH.

关键词： Deterioration

来源：评论

学校读者我要写书评

暂无评论

FPGA implementation of low cost and low power chaotic encryption scheme based on a discrete-space chaotic map

引用

Multimedia Tools and Applications 2025年 1-22页

作者： Moreira Bezerra, João Inácio Machado, Gustavo Iankowski Soares, Rafael Valduga de Almeida Camargo, Vinícius Molter, Alexandre Post Graduate Program in Computer Science Universidade Federal de Pelotas Rio Grande do Sul Pelotas96010610 Brazil Graduate Program in Computer Engineering Universidade Federal de Pelotas Rio Grande do Sul Pelotas96010610 Brazil Post Graduate Program in Mathematical Modeling Universidade Federal de Pelotas Rio Grande do Sul Capão do Leão96160000 Brazil

The exponential growth of the number of devices connected to the Internet and the use of IoT applications increases the amount of data exchange over public channels in low-cost and low-power embedded systems. Images are the most widely shared files, and standard symmetric algorithms such as the Advanced Encryption Standard (AES) are optimized for text but not image encryption. Consequently, new approaches like chaotic encryption have attracted researchers’ interest. Chaotic encryption schemes have been analyzed mostly from a software standpoint, but recent advancements in the field, through the use of discrete chaotic maps, enabled the development of simpler hardware implementations of ciphers with promising reductions in power and cost and increased performance. This work presents the Field-programmable Gate Array (FPGA) implementation of a simultaneous permutation-diffusion chaotic encryption scheme utilizing a discrete-space chaotic map. The FPGA implementation of the cipher is analyzed considering area, maximum frequency, and power consumption, and comparisons are made with the AES. The proposed algorithm has a satisfactory trade-off between area, power and performance, obtaining a peak throughput 59% higher than state-of-the-art symmetric ciphers in the literature. Thus, the proposed cipher shows that chaotic ciphers are viable for both high-performance and low-power embedded devices. Tests verified the security of the proposed cipher against statistical, differential, brute-force, and chosen plain-text attacks. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Cryptography

来源：评论

学校读者我要写书评

暂无评论

Measurement, Monitoring & Verification (MMV) Framework to Enhance Sustainability of Decarbonization Plan in the North Sea Area

Measurement, Monitoring & Verification (MMV) Framework to En...

引用

2024 SPE/AAPG/SEG Carbon, Capture, Utilization, and Storage Conference and Exhibition, CCUS 2024

作者： Ralanarko, Dwandari Ningrum, Wulan Sari Puspita Fathan, Hazred Badri, Annisa Mutiara Maulana, Muhammad Iqbal Pradana, Iqbal Daffa Darmawan, Fikri Rum Syafri, Ildrem Sunardi, Edi Adhiperdana, Billy Gumilar Faculty of Geological Engineering Universitas Padjajaran Indonesia Post Graduate Program Faculty of Geological Engineering Universitas Padjajaran Indonesia

ISBN: (纸本)9781959025627

The Sleipner CCS gas power station was designed with the intention of capturing, compressing, and transporting CO2 emissions offshore. These emissions were then intended to be injected into the Utsira Formation at a consistent rate of 1 million tonnes per year for a duration of up to 20 years. The establishment of site selection, characterization, and engineering designs is widely recognised as the primary approach to assuring the long-term security of CO2 storage. However, to validate their effectiveness, a complete Measurement, Monitoring, and Verification (MMV) programme is employed, which is based on a risk assessment framework. The Sleipner MMV programme was developed based on a comprehensive evaluation of storage containment risks particular to the site. Its primary objectives are to validate the effectiveness of containment measures, ensure compliance through continuous monitoring, gather data for accurate emission accounting, and facilitate the transfer of long-term responsibilities associated with storage. The design process employed by MMV involved the identification of a collection of suitable monitoring jobs and the corresponding monitoring technologies required to execute them. These determinations were made through the conduct of thorough feasibility studies that were tailored to the specific characteristics of the site in question. The objective of this method is to establish a comprehensive monitoring strategy that adheres to EU laws and incorporates various containment and environmental monitoring techniques. © CCUS 2024. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

INVESTIGATION OF FLEXURAL BEHAVIOUR OF STAINLESS STEEL CHANNEL SECTIONS

引用

ce/papers 2024年第1-2期7卷 240-249页

作者： de Lima, Cláucio Gonçalves Rodrigues, Monique Cordeiro Pereira, e Fernanda Lins Gonçalves PGECIV – Civil Engineering Post-Graduate Program UERJ – State University of Rio de Janeiro Brazil Structural Engineering Department UERJ – State University of Rio de Janeiro Brazil

In this paper, the design of austenitic stainless steel channel sections subjected to minor axis bending, specifically with tension in the web ("u" orientation) is analyzed. The values of moment resistance are predicted using Eurocode 3 criteria and the Continuous Strength Method (CSM), which are then compared with numerical models to assess effectiveness. The modeling is performed through ANSYS and calibrated with literature tests. It was found that Eurocode presents a considerable disparity in results, as well as an overly cautious response (on average, half the numerical load). The CSM reflects the performance more accurately but still with a certain level of conservatism (on average, around 35% lower). © 2024 Ernst & Sohn GmbH.

关键词： Codes (standards)

来源：评论

学校读者我要写书评

暂无评论

Real Time Chest X-Ray Interpretation Applying Vision Transformer for Tuberculosis Detection

Real Time Chest X-Ray Interpretation Applying Vision Transfo...

引用

2024 International Conference on Computer engineering, Network and Intelligent Multimedia, CENIM 2024

作者： Irhamsyah, Muhammad Roslidar Yunidar Al Lail Qadrillah, M. Nasaruddin Arnia, Fitri Munadi, Khairul Universitas Syiah Kuala Post Graduate Program in Engineering Banda Aceh2311 Indonesia Faculty of Engineering Department of Electrical and Computer Engineering 2311 Indonesia

ISBN: (纸本)9798350368802

Tuberculosis (TB) is an infectious disease that can attack the lungs and other organs. In the diagnosis of TB, the interpretation of X-ray radiological images requires special skills from medical specialists. However, the lack of experience of medical personnel and focus on X-ray examinations can be a challenge for radiologists because it has the potential to cause diagnostic errors in image interpretation. Therefore, we proposed a web-based application of real-time chest X-ray interpreter by integrating the deep learning model of Vision Transformer (ViT) to interpret chest X-ray images. The inference model was trained and tested on 652 normal and 652 tuberculosis X-ray images. The data preprocessing of Contrast Adaptive Histogram Equalization (CLAHE) was implemented to increase chest X-ray image contrast as well as inference model performance. The proposed real time system can inteprete the tested chest x-ray images with an accuracy of 95% and with simulation duration time of 4.7 seconds. © 2024 IEEE.

关键词： Diagnosis

来源：评论

学校读者我要写书评

暂无评论

Optimal Integration of Metaheuristic Techniques with Correction-Based Approaches for Profit Maximization in Combinatorial Production Planning: A Comparative Analysis 3

Optimal Integration of Metaheuristic Techniques with Correct...

引用

3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

作者： Mukherjee, Arijit Mukherjee, Surojit Future Institute of Technology Deptartment of Electrical Engineering Kolkata India Great Lakes Institute of Management Post-Graduate Program in Management Chennai India

ISBN: (纸本)9798350313703

To enhance production planning efficiency, it's crucial to have well-structured models that align with metaheuristic and other optimization techniques. This research conducts a comparative analysis of three unique metaheuristic methods: sanitized-teaching-learning-based optimization (sTLBO), Particle Swarm Optimization (PSO), and Differential Evolution (DE) with a termination criterion of equal number of functional evaluations. The primary focus lies on profit-maximizing production planning within a single-level framework, encompassing intricate domain constraints, nonlinear costs, budget limitations and raw material constraints. The paper introduces three correction-based solution approaches. Upon evaluating 300 distinct instances of the problem, the study reveals that s-TLBO integrated with correction-based approach 1 and 3 consistently outperforms the other methods when it comes to devising optimal production plans for a Saudi Arabian petrochemical industry. This industry scenario involves 24 products, 54 processes, and three raw materials. © 2024 IEEE.

关键词： Combinatorial optimization

来源：评论

学校读者我要写书评

暂无评论

Efficient Utilization of Metaheuristic Techniques for Profit Maximization in Combinatorial Production Planning: A Comparative Study 3

Efficient Utilization of Metaheuristic Techniques for Profit...

引用

3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

ISBN: (纸本)9798350313703

Efficient production planning requires well-structured models compatible with metaheuristic and other optimization techniques. This study compares three established metaheuristic methods - sanitized-teaching-learning-based optimization (s-TLBO), Particle Swarm Optimization (PSO), and Differential Evolution (DE) with a termination criterion of equal number of functional evaluations - for profit-maximizing production planning. The focus is on a single-level problem involving complex constraints, non-linear costs, budget and raw material limitations. The paper presents two solution strategies: a penalty-based and a correction-based approach. Analyzing 300 unique instances of the problem reveals that s-TLBO implemented with correction-based approach consistently outperforms the other methods in devising optimal production plans for two Saudi Arabian petrochemical industries with 24 products, 54 processes, and three raw materials for plant 1 and two raw materials for plant 2. © 2024 IEEE.

关键词： Combinatorial optimization

来源：评论

学校读者我要写书评

暂无评论

Identification of spatial potential flood-prone area using topographic wetness index under the digital elevation model of Kr. Keureuto watershed, North Aceh. 5

Identification of spatial potential flood-prone area using t...

引用

5th Aceh International Symposium on Civil engineering 2024, AISCE 2024

作者： Rizalihadi, Maimun Meilianda, Ella Yulianur, Alfiansyah Away, Yuwaldi Doctoral Program Post Graduate Program Syiah Kuala University Banda Aceh Indonesia Civil Engineering Department Syiah Kuala University Banda Aceh Indonesia Electro and Computer Engineering Department Syiah Kuala University Banda Aceh Indonesia

Floods are the most frequent disaster events in Lhoksukon, resulting in significant losses and community and environmental damage. Floods are generated by several factors, consisting of hydrometeorological, topographical, geological, soil, and human activities. Topography is a key controlling factor in flood initiation. Topographic analysis for detecting flood susceptibility, especially flood inundation, can be conducted using the TWI. The research aims to identify the potential spatial distribution of flood-prone areas based on TWI and assess the model accuracy using the ROC-AUC method. A case study was conducted in the Kr. Keureuto watershed. of North Aceh. TWI analysis is based on the topography of an area denoted by extracting DEM using GIS to create slope, flow direction, and flow accumulation. Higher TWI values are associated with higher flood susceptibility. The results show that the value of TWI is approximately 1.571-27.147, showing that more than 20% of area are potentially flood inundations with high and very hight rating of flood susceptibility. Furthermore, based on the analysis using field observation flood is obtained the AUC value of 71,60%. It can be concluded that the spatial model of flood-prone using TWI is good and effective for determining flood prone region in the Kr. Keureuto River basin © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Watersheds

来源：评论

学校读者我要写书评

暂无评论

Methodology to Improve the Quality of Cyber Threat Intelligence Production Through Open Source Platforms

Methodology to Improve the Quality of Cyber Threat Intell...

引用

International Conference on Computer Science, Electronics, and Industrial engineering, CSEI 2022

作者： Machado da Silva, Rogerio Costa Gondim, João José de Oliveira Albuquerque, Robson Professional Post-Graduate Program in Eletrical Engineering - PPEE Department of Eletrical Engineering University of Brasília Distrito Federal Brasília70910-900 Brazil

ISBN: (纸本)9783031305917

In cyberspace, boundaries are constantly being crossed in the name of progress and convenience, and invariably result in new vulnerabilities and potential attacks. Traditional security approaches are not able to contain the dynamic nature of new techniques and threats, which are increasingly resilient and complex. In this scenario, the sharing of threat intelligence is growing. However, the vast majority of data is shared in the form of unstructured textual reports, or extracted from blogs and social media. These data sources have been imposing great limitation on security analysts due to the high volume and low quality of Cyber Threat Intelligence (CTI). Among the various aspects that impose limitations on the use of CTI, we focus on data quality. Inaccurate, incomplete or outdated information makes actions reactive, in no way different from traditional approaches. However, quality threat intelligence has a positive impact on incident response time. In this work we propose an Indicator of Compromise enrichment process to improve the quality of CTI, based on the intelligence production cycle, we conduct research to define metrics capable of evaluating the CTI produced through open source licensed threat intelligence platforms. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Cybersecurity

来源：评论

学校读者我要写书评

暂无评论

Preparation and characterization of silica from rice husk ash as a reinforcing agent in whey protein isolate biocomposites film

引用

South African Journal of Chemical engineering 2023年 44卷 337-343页

作者： Zuwanna, Ika Riza, Medyan Aprilia, Sri Syamsuddin, Yanna Dewi, Rozanna Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Universitas Malikussaleh Aceh Utara 24351 Indonesia

This research focused on extracting silica (SiO2) from rice husk ash (RHA) to eliminate the problem of local disposal from the rice mill industry. Here, the various potassium hydroxide (KOH) composition was proposed t... 详细信息

This research focused on extracting silica (SiO₂) from rice husk ash (RHA) to eliminate the problem of local disposal from the rice mill industry. Here, the various potassium hydroxide (KOH) composition was proposed to identify SiO₂ characteristic, which is crucial to the particle size. The resulting SiO₂ was applied as a filler in whey protein isolate (WPI) biocomposite films. SiO₂ was synthesized from the RHA by carrying out a KOH solution, then separated from the extracted SiO₂ using hydrochloric acid (HCl). Fourier transform infrared spectroscopy, X-ray diffractometer, scanning electron microscopy, and dynamic light scattering were used to characterize all the SiO₂ material. It was found that the yield of SiO₂ was 2.85%, 4.63%, 7.32%, 15.63%, and 27.42%, severally. When the concentration of KOH was 1 N, 1.5 N, 2 N, 2.5 N, and 3 N, the crystallinity was 20.53% to 55.20%. Besides, the particle size ranged from 2.61 to 0.14 µm and the particle distribution from 2.09 to 1.56 µm. The tensile strength and elongation of WPI biocomposite film using 5% SiO₂ were 14.12 MPa and 30.70%, respectively. It can be summarized that SiO₂ is the potential to be used as a filler agent in biocomposite film. © 2023 The Author(s)

关键词： Biocomposite film Particle size Potassium hydroxide Rice husk ash Silica

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

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

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：