Engineering最新文献_第10页

Compact Millimeter-Wave, Dual-Band, Dual-Polarized, and Duplex-Scalable Phased Array Enabling B5G/6G Multistandard Systems 支持B5G/6G多标准系统的紧凑型毫米波、双频、双极化和双工可扩展相控阵

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-19 DOI: 10.1016/j.eng.2025.06.017

Kai Chen, Jun Xu, Renrong Zhao, Lei Xiang, Debin Hou, Zhiqiang Yu, Jianyi Zhou, Jixin Chen, Zhang-Cheng Hao, Wei Hong

{"title":"Compact Millimeter-Wave, Dual-Band, Dual-Polarized, and Duplex-Scalable Phased Array Enabling B5G/6G Multistandard Systems","authors":"Kai Chen, Jun Xu, Renrong Zhao, Lei Xiang, Debin Hou, Zhiqiang Yu, Jianyi Zhou, Jixin Chen, Zhang-Cheng Hao, Wei Hong","doi":"10.1016/j.eng.2025.06.017","DOIUrl":"https://doi.org/10.1016/j.eng.2025.06.017","url":null,"abstract":"A new, compact, and dual-band dual-polarized duplex (D3) phased array architecture is proposed in this study. In contrast to studies reported previously, this design integrates four independent beamforming systems within a single printed circuit board (PCB), enabling the proposed 1 × 4 phased array to transmit or receive simultaneously vertically and horizontally polarized signals at 28 and 38 GHz, thereby supporting concurrent, dual-band, and dual-polarized four-beam operations. In addition, the exceptional frequency selectivity of the phased array facilitates frequency-division duplex operations. By adopting a brick-type architecture, the proposed phased array achieves two-dimensional scalability, which allows it to serve either as a standalone, small-scale phased array, or as a sub-block for larger-scale arrays. A novel dual-polarized end-fire magnetoelectric dipole antenna was developed as the radiating element for the phased array. This antenna exhibits an impedance bandwidth of return loss below −10 dB across the frequency range of 24.8–40.3 GHz (47.6%), which represents one of the broadest operating bands reported for PCB-based, co-apertured, and dual-polarized end-fire antennas. Experimental validation of the fabricated phased array demonstrated that the two orthogonal polarizations could achieve beam-scanning ranges exceeding 90° and 60° at 28 and 38 GHz, respectively. The measured effective isotropic radiated power values exhibited distinct frequency selectivities between the two bands. To the best of our knowledge, this is the first demonstration of a D3 phased array that presents a promising solution for beyond fifth-generation (B5G) and sixth-generation (6G) millimeter-wave multistandard systems.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"240 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control of Large-Displacement Disasters in Deep Coal Mine Roadways and Rapid TBM Tunneling Technologies under Large-Displacement Conditions 深部煤矿巷道大位移灾害控制及大位移条件下TBM快速掘进技术

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-19 DOI: 10.1016/j.eng.2025.06.016

Quansheng Liu, Bin Liu, Bin Tang, Yongshui Kang, Haifeng Lu, Yuanguang Zhu, Xing Huang, Yucong Pan, Penghai Deng, Lei Sun, Yongzhi Tang, Xingli Lu, Chenyuan Zhang, Honggan Yu, Peitao Li, Yiming Lei, Haonan Jia

{"title":"Control of Large-Displacement Disasters in Deep Coal Mine Roadways and Rapid TBM Tunneling Technologies under Large-Displacement Conditions","authors":"Quansheng Liu, Bin Liu, Bin Tang, Yongshui Kang, Haifeng Lu, Yuanguang Zhu, Xing Huang, Yucong Pan, Penghai Deng, Lei Sun, Yongzhi Tang, Xingli Lu, Chenyuan Zhang, Honggan Yu, Peitao Li, Yiming Lei, Haonan Jia","doi":"10.1016/j.eng.2025.06.016","DOIUrl":"https://doi.org/10.1016/j.eng.2025.06.016","url":null,"abstract":"As mining depths increase, large-displacement disasters have become a significant challenge in deep coal mine roadways, severely restricting safe and efficient resource extraction. The primary obstacles include ① an unclear understanding of large-displacement mechanisms, ② a lack of effective control strategies, and ③ an absence of efficient tunneling technologies under severe large-displacement conditions. To bridge these gaps, this study systematically investigates the failure mechanism and control methods of large-displacement disasters and proposes solutions for rapid tunneling. The following main advancements are achieved: ① Novel stress-field and rock-structure monitoring techniques and a combined continuum–discontinuum numerical approach are introduced, and—for the first time—the fragmenting swelling large-displacement mechanism in deep coal roadways is elucidated. ② A novel stepwise collaborative support method is presented that integrates restoration of the stress state, strengthening of the surrounding rock, consolidation of the failure zone and repair of the damage zone, and the transference of the stress peak and enlargement of the bearing zone, thus effectively controlling large-displacement disasters. ③ Key technologies—including an adaptive tunnel-boring machine (TBM) design, a decision-making system tailored for deep and complex geological formations, and predictive and real-time control methodologies for large-displacement disasters during TBM excavation—are formulated, which ensure safe and efficient TBM tunneling under large-displacement conditions. These advancements provide a robust framework for managing large-displacement disasters and optimizing TBM-based excavation in deep coal mine tunnels.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"15 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Space–Ground Fluid AI for 6G Edge Intelligence 用于6G边缘智能的空间-地面流体AI

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.009

Qian Chen, Zhanwei Wang, Xianhao Chen, Juan Wen, Di Zhou, Sijing Ji, Min Sheng, Kaibin Huang

{"title":"Space–Ground Fluid AI for 6G Edge Intelligence","authors":"Qian Chen, Zhanwei Wang, Xianhao Chen, Juan Wen, Di Zhou, Sijing Ji, Min Sheng, Kaibin Huang","doi":"10.1016/j.eng.2025.06.009","DOIUrl":"https://doi.org/10.1016/j.eng.2025.06.009","url":null,"abstract":"The commercialization of sixth-generation (6G) mobile networks is expected by 2030. According to the International Telecommunication Union (ITU), two of three new usage scenarios in 6G mobile networks—as compared with fifth-generation (5G) mobile networks—are “integrated artificial intelligence (AI) and communication” and “ubiquitous connectivity.” For the former scenario, edge AI has emerged as a mainstream direction for 6G development [1]. By supporting distributed machine learning, AI inference, and AI model delivery at the network edge, 6G mobile networks can enable a wide range of applications, including extended reality, autonomous driving, and collaborative robots. For the latter scenario, 6G is anticipated to form space–ground integrated networks (SGINs) that seamlessly integrate terrestrial and non-terrestrial (satellite) networks [2]. In this context, numerous countries, as well as leading technology companies such as SpaceX, have joined the race to launch mega-constellations of interconnected satellites as a new type of telecommunication infrastructure.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"4 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scientists Increasingly Using AI to Help Write Papers—for Better or Worse 科学家越来越多地使用人工智能来帮助撰写论文——无论好坏

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.010

引用次数: 0

Can Batteries Meet the Looming Demand for Grid-scale Storage? 电池能否满足电网规模存储的潜在需求？

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.011

引用次数: 0

On an Ultra-Dense LEO-Satellite-Based Computing Network Constellation Design 基于超密集低轨道卫星的计算网络星座设计

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.007

Yijing Sun, Boya Di, Ruoqi Deng, Lingyang Song

{"title":"On an Ultra-Dense LEO-Satellite-Based Computing Network Constellation Design","authors":"Yijing Sun, Boya Di, Ruoqi Deng, Lingyang Song","doi":"10.1016/j.eng.2025.06.007","DOIUrl":"https://doi.org/10.1016/j.eng.2025.06.007","url":null,"abstract":"Commercial ultra-dense low-Earth-orbit (LEO) satellite constellations have recently been deployed to provide seamless global Internet services. To improve the satellite network transmission efficiency and provide robust wide-coverage computing services for future sixth-generation (6G) users, growing attention has been focused on LEO-satellite-based computing networks, to which ground users can offload computation tasks. However, how to design a LEO satellite constellation for computing networks, while considering discrepancies in the computing requirements of different regions, remains an open question. In this paper, we investigate an ultra-dense LEO-satellite-based computing network to which ground user terminals (UTs) offload part of their computing tasks to satellites. We formulate the ultra-dense constellation design problem as a multi-objective optimization problem (MOOP) to maximize the average coverage rate, transmission capacity, and computational capability, while minimizing the number of satellites. In order to depict the connectivity characteristics of satellite-based computing networks, we propose a terrestrial–satellite connectivity model to determine the coverage rate in different regions. We design a priority-adaptive algorithm to design the optimal inclined-orbit constellation by solving this MOOP. Simulation results verify the accuracy of our theoretical connectivity model and show the optimal constellation deployment, given quality-of-service (QoS) requirements. For the same number of deployed LEO satellites, the proposed constellation outperforms its existing counterparts; in particular, it achieves 25%–45% performance improvements in the average coverage rate.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"26 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on Mixed Reflection Behavior of Cool Pavement Coating and Its Impact on Safety of Road Light Environment 低温路面涂层混合反射特性及其对道路光环境安全影响的研究

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.014

Hui Li, Ning Xie, Xue Zhang, Lijun Sun, John T. Harvey, Lei Wang

{"title":"Investigation on Mixed Reflection Behavior of Cool Pavement Coating and Its Impact on Safety of Road Light Environment","authors":"Hui Li, Ning Xie, Xue Zhang, Lijun Sun, John T. Harvey, Lei Wang","doi":"10.1016/j.eng.2025.06.014","DOIUrl":"https://doi.org/10.1016/j.eng.2025.06.014","url":null,"abstract":"Due to low reflectance (5%–10%) of black asphalt pavement, most of the incident solar radiation (295–2500 nm) is absorbed and stored. This results in the high temperature (even exceeding 70 °C in summer) of the pavement surface, which leads to pavement diseases, exacerbates the heat island effect, and reduces human thermal comfort. Reflective pavement coating with high reflectance ranging from 20% to 80% is an effective way to solve the above problems. However, excessively improving the visible reflectance and ignoring the mixed reflection behavior (including specular and diffuse reflection properties) may cause glare problems and negatively affect road light environment safety. Therefore, precise control of reflectance is very significant. In this study, an automated test platform of reflection behavior was developed to investigate the mixed light reflection distribution pattern of reflective coating. Additionally, the impact of reflective coating on the light environment was explored. It was found that there was obvious specular reflection under conditions of a low incidence angle (less than 10°). Moreover, reflective coating could change the lightness index and specular reflection coefficient of traditional pavement. Finally, considering glare during the daytime and the nighttime illumination safety, the control indexes of reflective pavement coating were proposed. The visible reflectance and specular reflection coefficient should be lower than 22% and 1.5, respectively. The results will provide a theoretical basis for the precise and safe design of reflective pavement coatings to improve driving safety as well as the pavement light and thermal environment.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"153 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prebiotic Microcapsule-encapsulated Pterostilbene Alleviates Ulcerative Colitis by Regulating the Intestinal Microenvironment and Activating AHR/IL-22 Pathway 益生元微胶囊紫檀芪通过调节肠道微环境和激活AHR/IL-22途径缓解溃疡性结肠炎

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.04.026

Huanyu Li, Ziwei Yang, Chuanyu Zhang, Xueyong Wei, Wenjing Wang, Ting Bai, Zhichao Deng, Bowen Gao, Manli Cui, Weixuan Jing, Mingzhen Zhang, Zhaoxiang Yu, Mingxin Zhang

{"title":"Prebiotic Microcapsule-encapsulated Pterostilbene Alleviates Ulcerative Colitis by Regulating the Intestinal Microenvironment and Activating AHR/IL-22 Pathway","authors":"Huanyu Li, Ziwei Yang, Chuanyu Zhang, Xueyong Wei, Wenjing Wang, Ting Bai, Zhichao Deng, Bowen Gao, Manli Cui, Weixuan Jing, Mingzhen Zhang, Zhaoxiang Yu, Mingxin Zhang","doi":"10.1016/j.eng.2025.04.026","DOIUrl":"https://doi.org/10.1016/j.eng.2025.04.026","url":null,"abstract":"Ulcerative colitis (UC) is a chronic, non-specific inflammatory disorder of the intestines whose etiology is influenced by various factors. Intestinal barrier impairment due to disturbances in the intestinal microenvironment is a key feature of UC. Current therapeutic strategies are constrained in their capacity to fully restore the intestinal barrier and achieve comprehensive resolution of inflammation in a coordinated manner. In this study, we constructed a pterostilbene (PSB)-loaded prebiotic microcapsule (PSB@MC) using a microfluidic electrospray method and characterized it using various means. Its safety, biodistribution, protective, and therapeutic effects on colitis were evaluated in various animal models. The potential mechanisms by which PSB@MC exerts its therapeutic effects were subsequently explored. The results indicated that PSB@MC exhibited favorable biocompatibility and facilitated targeted delivery of PSB to the colon. Moreover, the wrinkled morphology of PSB@MC contributed to prolonged drug retention in the colon. Oral PSB@MC administration restored intestinal microenvironment homeostasis by scavenging reactive oxygen species (ROS), decreasing pro-inflammatory cytokines, modulating gut microbiota and metabolism, and providing protective and therapeutic benefits against dextran sulfate sodium-induced colitis. Additionally, our research demonstrated that PSB@MC could activate the aryl hydrocarbon receptor/interleukin-22 (AHR/IL-22) pathway to enhance the integrity of the intestinal barrier. These results suggest that PSB@MC could be a new, secure, and efficient UC therapy option.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"605 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-Time Machine Learning-Based Position Recognition in Laser Nanofabrication with Sub-Half-Wavelength Precision 基于实时机器学习的亚半波长激光纳米加工位置识别

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.03.037

Hao Zhang, Jinchuan Zheng, Guiyuan Cao, Han Lin, Baohua Jia

{"title":"Real-Time Machine Learning-Based Position Recognition in Laser Nanofabrication with Sub-Half-Wavelength Precision","authors":"Hao Zhang, Jinchuan Zheng, Guiyuan Cao, Han Lin, Baohua Jia","doi":"10.1016/j.eng.2025.03.037","DOIUrl":"https://doi.org/10.1016/j.eng.2025.03.037","url":null,"abstract":"Laser nanofabrication with tightly focused ultrafast laser pulses enable versatile fabrication of arbitrary two-dimensional (2D)/three-dimensional (3D) micro/nanostructures. Accurate positioning of the laser focal spot is crucial, especially for high-resolution integrated devices in 2D materials, requiring precise placement on atomically thin surfaces. However, uneven surfaces and surface tilt poses significant challenges. Existing methods to detect focal positions often involve complex setups with additional optical components or sensors, achieving limited accuracy. This study introduces a machine learning-based method to accurately detect the focal position during laser nanofabrication by analyzing the shape and intensity of the laser focal spot. We compare four machine learning methods: rational quadratic Gaussian process regression, kernel approximation least square, quadratic support vector machine, and trilayered neural network. Our experiments show that TNN method achieves a detection accuracy of 257 nanometers (nm) (half the fabrication laser wavelength), surpassing the required accuracy for tightly focused laser beam (typically larger than one wavelength). This method can map focal positions along the fabrication trajectory to compensate for surface roughness or tilt. Moreover, it can be directly implemented in any laser nanofabrication system with a camera for in situ monitoring, without requiring additional optical components, indicating broad applicability.","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"231 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vaccines Join Flagging Fight Against Malaria 疫苗加入对抗疟疾的战斗

IF 12.8 1区工程技术

Engineering Pub Date : 2025-06-16 DOI: 10.1016/j.eng.2025.06.012

引用次数: 0