IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.04.024

Jiarui Xie , Lijun Sun , Yaoyao Fiona Zhao

{"title":"On the Data Quality and Imbalance in Machine Learning-based Design and Manufacturing—A Systematic Review","authors":"Jiarui Xie , Lijun Sun , Yaoyao Fiona Zhao","doi":"10.1016/j.eng.2024.04.024","DOIUrl":"10.1016/j.eng.2024.04.024","url":null,"abstract":"<div><div>Machine learning (ML) has recently enabled many modeling tasks in design, manufacturing, and condition monitoring due to its unparalleled learning ability using existing data. Data have become the limiting factor when implementing ML in industry. However, there is no systematic investigation on how data quality can be assessed and improved for ML-based design and manufacturing. The aim of this survey is to uncover the data challenges in this domain and review the techniques used to resolve them. To establish the background for the subsequent analysis, crucial data terminologies in ML-based modeling are reviewed and categorized into data acquisition, management, analysis, and utilization. Thereafter, the concepts and frameworks established to evaluate data quality and imbalance, including data quality assessment, data readiness, information quality, data biases, fairness, and diversity, are further investigated. The root causes and types of data challenges, including human factors, complex systems, complicated relationships, lack of data quality, data heterogeneity, data imbalance, and data scarcity, are identified and summarized. Methods to improve data quality and mitigate data imbalance and their applications in this domain are reviewed. This literature review focuses on two promising methods: data augmentation and active learning. The strengths, limitations, and applicability of the surveyed techniques are illustrated. The trends of data augmentation and active learning are discussed with respect to their applications, data types, and approaches. Based on this discussion, future directions for data quality improvement and data imbalance mitigation in this domain are identified.</div></div>","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"45 ","pages":"Pages 105-131"},"PeriodicalIF":10.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141703431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser Ignition Breakthrough—and More Startups—Brighten Outlook for Nuclear Fusion

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.12.002

Mitch Leslie (Senior Technology Writer)

引用次数: 0

Could Glacier Geoengineering Freeze Sea Level Rise?

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.12.005

Mitch Leslie (Senior Technology Writer)

引用次数: 0

Time Evolution of Orbital Angular Momentum Modes for Deep-Routing Multiplexing Channels

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.09.016

Zebin Huang , Peipei Wang , Jiafu Chen , Wenjie Xiong , Huapeng Ye , Xinxing Zhou , Ze Dong , Dianyuan Fan , Shuqing Chen

{"title":"Time Evolution of Orbital Angular Momentum Modes for Deep-Routing Multiplexing Channels","authors":"Zebin Huang , Peipei Wang , Jiafu Chen , Wenjie Xiong , Huapeng Ye , Xinxing Zhou , Ze Dong , Dianyuan Fan , Shuqing Chen","doi":"10.1016/j.eng.2024.09.016","DOIUrl":"10.1016/j.eng.2024.09.016","url":null,"abstract":"<div><div>Optical orbital angular momentum (OAM) mode multiplexing has emerged as a promising technique for boosting communication capacity. However, most existing studies have concentrated on channel (de)multiplexing, overlooking the critical aspect of channel routing. This challenge involves the reallocation of multiplexed OAM modes across both spatial and temporal domains—a vital step for developing versatile communication networks. To address this gap, we introduce a novel approach based on the time evolution of OAM modes, utilizing the orthogonal conversion and diffractive modulation capabilities of unitary transformations. This approach facilitates high-dimensional orthogonal transformations of OAM mode vectors, altering both the propagation direction and the spatial location. Using Fresnel diffraction matrices as unitary operators, it manipulates the spatial locations of light beams during transmission, breaking the propagation invariance and enabling temporal evolution. As a demonstration, we have experimentally implemented the deep routing of four OAM modes within two distinct time sequences. Achieving an average diffraction efficiency above 78.31%, we have successfully deep-routed 4.69 Tbit·s<sup>−1</sup> quadrature phase-shift keying (QPSK) signals carried by four multiplexed OAM channels, with a bit error rate below 10<sup>–6</sup>. These results underscore the efficacy of our routing strategy and its promising prospects for practical applications.</div></div>","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"45 ","pages":"Pages 97-104"},"PeriodicalIF":10.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic Cost–Benefit Analysis of Digitalization in the Energy Industry

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.11.005

Jose Angel Leiva Vilaplana , Guangya Yang , Emmanuel Ackom , Roberto Monaco , Yusheng Xue

{"title":"Dynamic Cost–Benefit Analysis of Digitalization in the Energy Industry","authors":"Jose Angel Leiva Vilaplana , Guangya Yang , Emmanuel Ackom , Roberto Monaco , Yusheng Xue","doi":"10.1016/j.eng.2024.11.005","DOIUrl":"10.1016/j.eng.2024.11.005","url":null,"abstract":"<div><div>Assessing the benefits and costs of digitalization in the energy industry is a complex issue. Traditional cost–benefit analysis (CBA) might encounter problems in addressing uncertainties, dynamic stakeholder interactions, and feedback loops arising out of the evolving nature of digitalization. This paper introduces a methodological framework to help address the intricate inter connections between digital applications and business models in the energy industry. The proposed framework leverages system dynamics to achieve two primary objectives. It investigates how digitalization generally influences the value proposition, value capture, and value creation dimensions of business models. It also quantifies the financial and social impacts of digitalization from a dynamic perspective. The proposed dynamic CBA allows for a more precise quantification of the benefits and costs, associated with evidence-based decision-making. Findings from an illustrative case study challenge the static assumptions of conventional methods. These methods often presume continuous operation, neglecting reinvestment and operational feedback loops, and resulting in negative net present values. Conversely, the outcomes of the proposed method indicate positive net present values when accounting for factors such as reinvestment rates and the willingness to invest in digitalization projects. The principles outlined in this paper can enable a more accurate assessment of digitalization projects, thus catalyzing the development of new CBA applications and guidelines for digitalization.</div></div>","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"45 ","pages":"Pages 174-187"},"PeriodicalIF":10.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial for the Special Issue on Subwavelength Optics

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2025.01.004

Xiangang Luo , Jinghua Teng , Mingbo Pu

引用次数: 0

Nonlinear Meta-Devices: From Plasmonic to Dielectric

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.11.021

Rong Lin , Jin Yao , Zhihui Wang , Che Ting Chan , Din Ping Tsai

引用次数: 0

Green and High-Yield Recovery of Phosphorus from Municipal Wastewater for LiFePO4 Batteries 为磷酸铁锂电池从城市污水中绿色高产地回收磷

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.05.018

Yijiao Chang , Xuan Wang , Bolin Zhao , Anjie Li , Yiru Wu , Bohua Wen , Bing Li , Xiao-Yan Li , Lin Lin

{"title":"Green and High-Yield Recovery of Phosphorus from Municipal Wastewater for LiFePO4 Batteries","authors":"Yijiao Chang , Xuan Wang , Bolin Zhao , Anjie Li , Yiru Wu , Bohua Wen , Bing Li , Xiao-Yan Li , Lin Lin","doi":"10.1016/j.eng.2024.05.018","DOIUrl":"10.1016/j.eng.2024.05.018","url":null,"abstract":"<div><div>The rapidly growing demand for lithium iron phosphate (LiFePO<sub>4</sub>) as the cathode material of lithium-ion batteries (LIBs) has aggravated the scarcity of phosphorus (P) reserves on Earth. This study introduces an environmentally friendly and economical method of P recovery from municipal wastewater, providing the P source for LiFePO<sub>4</sub> cathodes. The novel approach utilizes the sludge of Fe-coagulant-based chemical P removal (CPR) in wastewater treatment. After a sintering treatment with acid washing, the CPR sludge, enriched with P and Fe, transforms into purified P–Fe oxides (Fe<sub>2.1</sub>P<sub>1.0</sub>O<sub>5.6</sub>). These oxides can substitute up to 35% of the FePO<sub>4</sub> reagent as precursor, producing a carbon-coated LiFePO<sub>4</sub> (LiFePO<sub>4</sub>/C) cathode with a specific discharge capacity of 114.9 mA·h·g<sup>−1</sup> at current density of 17 mA·g<sup>−1</sup>), and cycle stability of 99.2% after 100 cycles. The enhanced cycle performance of the as-prepared LiFePO<sub>4</sub>/C cathode may be attributed to the incorporations of impurities (such as Ca<sup>2+</sup> and Na<sup>+</sup>) from sludge, with improved stability of crystal structure. Unlike conventional P-fertilizers, this P recovery technology converts 100% of P in CPR sludge into the production of value-added LiFePO<sub>4</sub>/C cathodes. The recovered P from municipal wastewater can meet up to 35% of the P demand in the Chinese LIBs industry, offering a cost-effective solution for addressing the pressing challenges of P scarcity.</div></div>","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"45 ","pages":"Pages 234-242"},"PeriodicalIF":10.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart Techniques Promoting Sustainability in Construction Engineering and Management

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.08.023

Song-Shun Lin , Shui-Long Shen , Annan Zhou , Xiang-Sheng Chen

{"title":"Smart Techniques Promoting Sustainability in Construction Engineering and Management","authors":"Song-Shun Lin , Shui-Long Shen , Annan Zhou , Xiang-Sheng Chen","doi":"10.1016/j.eng.2024.08.023","DOIUrl":"10.1016/j.eng.2024.08.023","url":null,"abstract":"<div><div>Construction engineering and management (CEM) has become increasingly complicated with the increasing size of engineering projects under different construction environments, motivating the digital transformation of CEM. To contribute to a better understanding of the state of the art of smart techniques for engineering projects, this paper provides a comprehensive review of multi-criteria decision-making (MCDM) techniques, intelligent techniques, and their applications in CEM. First, a comprehensive framework detailing smart technologies for construction projects is developed. Next, the characteristics of CEM are summarized. A bibliometric review is then conducted to investigate the keywords, journals, and clusters related to the application of smart techniques in CEM during 2000–2022. Recent advancements in intelligent techniques are also discussed under the following six topics: ① big data technology; ② computer vision; ③ speech recognition; ④ natural language processing; ⑤ machine learning; and ⑥ knowledge representation, understanding, and reasoning. The applications of smart techniques are then illustrated via underground space exploitation. Finally, future research directions for the sustainable development of smart construction are highlighted.</div></div>","PeriodicalId":11783,"journal":{"name":"Engineering","volume":"45 ","pages":"Pages 262-282"},"PeriodicalIF":10.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AlphaFold Wins Nobel Prize, Gains Functionality, Drops Open Access

IF 10.1 1区工程技术

Engineering Pub Date : 2025-02-01 DOI: 10.1016/j.eng.2024.12.003

Chris Palmer (Senior Technology Writer)

引用次数: 0

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