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Eng, Volume 6, Issue 7

July 2025 - 35 articles

Cover Story: In this study, we introduce an adjoint formulation for the Maxwell equations for performing high-fidelity, gradient-driven radar cross-section optimization using the Boundary Element Method within an industrial context. The use of adjoint gradients enables efficient shape optimization for complex geometries. A Computer-Aided Design modeler is employed to manipulate shapes, offering significant practical benefits. A stealth criterion was devised to mirror real-world design objectives. Although the method requires further development, its promising results on both canonical and complex shapes highlight the value of high-fidelity radar cross-section optimization. View this paper
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Articles (35)

  • Article
  • Open Access
1 Citations
730 Views
24 Pages

21 July 2025

The pile group-pile cap structure is a key foundation form for deep-water bridges. However, current effective methods for calculating the earthquake-induced hydrodynamic forces on pile caps with arbitrary cross-sections remain insufficient. In this s...

  • Article
  • Open Access
617 Views
17 Pages

Loading Response of Segment Lining with Pea-Gravel Grouting Defects for TBM Tunnel in Transition Zones of Surrounding Rocks

  • Qixing Che,
  • Changyong Li,
  • Xiangfeng Wang,
  • Zhixiao Zhang,
  • Yintao He and
  • Shunbo Zhao

21 July 2025

Pea-gravel grouting, which fills the gap between the lining of tunnels and the surrounding rock, is crucial for the structural stability and waterproofing of water delivery TBM tunnels. However, it is prone to defects due to complex construction cond...

  • Perspective
  • Open Access
1,350 Views
32 Pages

A Brief Perspective on Deep Learning Approaches for 2D Semantic Segmentation

  • Shazia Sulemane,
  • Nuno Fachada and
  • João P. Matos-Carvalho

18 July 2025

Semantic segmentation is a vast field with many contributions, which can be difficult to organize and comprehend due to the amount of research available. Advancements in technology and processing power over the past decade have led to a significant i...

  • Article
  • Open Access
1 Citations
627 Views
23 Pages

Hydrochemical Characteristics and Genesis Analysis of Closed Coal Mining Areas in Southwestern Shandong Province, China

  • Xiaoqing Wang,
  • Jinxian He,
  • Guchun Zhang,
  • Jianguo He,
  • Heng Zhao,
  • Meng Wu,
  • Xuejuan Song and
  • Dongfang Liu

18 July 2025

With the large-scale closure of coal mines leading to groundwater pollution, in order to systematically identify the sources of major chemical ions in surface water and groundwater. This study comprehensively applied methods such as Piper’s tri...

  • Article
  • Open Access
3 Citations
1,690 Views
21 Pages

Exploring LLM Embedding Potential for Dementia Detection Using Audio Transcripts

  • Brandon Alejandro Llaca-Sánchez,
  • Luis Roberto García-Noguez,
  • Marco Antonio Aceves-Fernández,
  • Andras Takacs and
  • Saúl Tovar-Arriaga

17 July 2025

Dementia is a neurodegenerative disorder characterized by progressive cognitive impairment that significantly affects daily living. Early detection of Alzheimer’s disease—the most common form of dementia—remains essential for prompt...

  • Article
  • Open Access
588 Views
22 Pages

17 July 2025

To analyze the wear performance induced by rotor–stator rubbing in an aero-engine sealing structure under authentic operating conditions, a transonic rotor system with double bearing is constructed. This system incorporates the disk, shaft, bla...

  • Article
  • Open Access
1 Citations
2,613 Views
16 Pages

Enhancing Software Defect Prediction Using Ensemble Techniques and Diverse Machine Learning Paradigms

  • Ayesha Siddika,
  • Momotaz Begum,
  • Fahmid Al Farid,
  • Jia Uddin and
  • Hezerul Abdul Karim

15 July 2025

In today’s fast-paced world of software development, it is essential to ensure that programs run smoothly without any issues. When dealing with complex applications, the objective is to predict and resolve problems before they escalate. The pre...

  • Article
  • Open Access
2,174 Views
15 Pages

Development and Characterization of Composite Films of Potato Starch and Carboxymethylcellulose/Poly(ethylene oxide) Nanofibers

  • Yenny Paola Cruz Moreno,
  • Andres Felipe Rubiano-Navarrete,
  • Erika Rocio Cely Rincón,
  • Adriana Elizabeth Lara Sandoval,
  • Alfredo Maciel Cerda,
  • Edwin Yesid Gomez-Pachon and
  • Ricardo Vera-Graziano

15 July 2025

This study aimed to develop and characterize biodegradable films based on potato starch reinforced with carboxymethylcellulose (CMC) and polyethylene oxide (PEO) nanofibers, with the goal of improving their mechanical and thermal properties for poten...

  • Review
  • Open Access
1 Citations
2,798 Views
28 Pages

The Structural Performance of Fiber-Reinforced Geopolymers: A Review

  • Salvatore Benfratello,
  • Luigi Palizzolo,
  • Carmelo Sanfilippo,
  • Antonino Valenza and
  • Sana Ullah

14 July 2025

Geopolymers (GPs), as promising alternatives to ordinary Portland cement (OPC)-based concrete, have gained interest in the last 20 years due to their enhanced mechanical properties, durability, and lower environmental impact. Synthesized from industr...

  • Feature Paper
  • Article
  • Open Access
1,083 Views
17 Pages

Flexible Visible Spectral Sensing for Chilling Injuries in Mango Storage

  • Longgang Ma,
  • Zhengzhong Wan,
  • Zhencan Yang,
  • Xunjun Chen,
  • Ruihua Zhang,
  • Maoyuan Yin and
  • Xinqing Xiao

10 July 2025

Mango, as an important economic crop in tropical and subtropical regions, suffers from chilling injuries caused by postharvest low-temperature storage, which seriously affect its quality and economic benefits. Traditional detection methods have limit...

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Eng - ISSN 2673-4117