Communications engineering最新文献_第6页

Economically viable geological CO₂ storage from direct air capture has critical threshold of 70% CO₂ concentration. 经济上可行的直接空气捕集的地质CO2储存具有70% CO2浓度的临界阈值。

Communications engineering Pub Date : 2025-07-15 DOI: 10.1038/s44172-025-00468-5

Le Zhang, Yunfeng Liang, Arata Kioka, Takeshi Tsuji

{"title":"Economically viable geological CO2 storage from direct air capture has critical threshold of 70% CO2 concentration.","authors":"Le Zhang, Yunfeng Liang, Arata Kioka, Takeshi Tsuji","doi":"10.1038/s44172-025-00468-5","DOIUrl":"10.1038/s44172-025-00468-5","url":null,"abstract":"Direct Air Capture (DAC), a key component of Carbon Capture and Storage (CCS), has been widely studied. However, its large-scale deployment is hindered by the high energy cost of purifying captured CO2. Using impure CO2 can reduce energy consumption and overall costs, but it also lowers storage efficiency. This work employs molecular dynamics simulations to examine storage efficiency by analyzing the impurity systems' density across a wide temperature and pressure range. The results indicate a strong similarity between the density changes at the macroscopic level and the Van der Waals interaction changes at the molecular level. Additionally, the Normalized Storage Efficiency caused by Impurities (NSEI) is proposed, which can be used for storage potential and cost evaluation. A detailed NSEI analysis suggests that CO2 concentration should reach at least 70% to achieve economically viable storage. This finding provides practical guidance for DAC capture system design and impurity CCS project planning.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"4 1","pages":"127"},"PeriodicalIF":0.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12264126/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144644271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Operation optimisation of direct current microgrids toward stability and economy: a model-data co-driven framework. 面向稳定性和经济性的直流微电网运行优化：模型-数据共同驱动框架。

Communications engineering Pub Date : 2025-07-14 DOI: 10.1038/s44172-025-00466-7

Yuxin Zhu, Fei Wang, Zhengyu Lin, James Fleming

{"title":"Operation optimisation of direct current microgrids toward stability and economy: a model-data co-driven framework.","authors":"Yuxin Zhu, Fei Wang, Zhengyu Lin, James Fleming","doi":"10.1038/s44172-025-00466-7","DOIUrl":"10.1038/s44172-025-00466-7","url":null,"abstract":"Direct current microgrids are widely regarded as a promising clean power system technique. However, the microgrid stability is challenged by routine operations and unplanned faults, especially when the operation optimisation overly pursues economy at the expense of stability. This paper proposes a stability-constrained operation optimisation to balance the stability and economy of islanded direct current microgrids. The proposed stability-constrained operation optimisation is formulated as a nonlinear optimisation model and a model-data co-driven solution algorithm is developed. The proposed method strictly guarantees the stability requirements. Furthermore, the proposed method consists of local convex approximations and a small amount of stability evaluation, thus exhibiting high efficiency. Case study illustrates that the proposed method is not affected by prediction errors and avoids the violation of stability constraints. In some tests, the proposed method keeps the solution time within seconds compared to the model-driven method that may take up to the minute level.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"4 1","pages":"125"},"PeriodicalIF":0.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12259914/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144638829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Author Correction: Photonic neuromorphic accelerator for convolutional neural networks based on an integrated reconfigurable mesh. 作者更正：基于集成可重构网格的卷积神经网络光子神经形态加速器。

Communications engineering Pub Date : 2025-07-10 DOI: 10.1038/s44172-025-00463-w

Aris Tsirigotis, George Sarantoglou, Stavros Deligiannidis, Erica Sánchez, David Sanchez, Ana Gutierrez, Adonis Bogris, Jose Capmany, Charis Mesaritakis

引用次数: 0

LED-pumped room-temperature solid-state maser. led泵浦室温固态脉泽。

Communications engineering Pub Date : 2025-07-09 DOI: 10.1038/s44172-025-00455-w

Sophia Long, Lisa Lopez, Bethan Ford, François Balembois, Riccardo Montis, Wern Ng, Daan M Arroo, Neil McN Alford, Hamdi Torun, Juna Sathian

引用次数: 0

Ultrasonographic-guided robotic-assisted percutaneous nephrolithotomy. 超声引导下机器人辅助经皮肾镜取石术。

Communications engineering Pub Date : 2025-07-08 DOI: 10.1038/s44172-025-00451-0

Stefano Bazzani, Stefano Puliatti, Stefania Ferretti, Giampaolo Bianchi, Cristian Secchi, Federica Ferraguti

引用次数: 0

Combined strategies for promoting short-chain fatty acids production from waste activated sludge in anaerobic fermentation. 厌氧发酵中促进废活性污泥生产短链脂肪酸的组合策略。

Communications engineering Pub Date : 2025-07-08 DOI: 10.1038/s44172-025-00436-z

Xiaodi Li, Lu Wang, Mianfeng Zhang, Bo Wang, Wei Zeng, Yongzhen Peng

引用次数: 0

A high-precision 1 × 15 infrared temperature measurement linear array based on thermopile sensors. 基于热电堆传感器的高精度1 × 15红外测温线性阵列。

Communications engineering Pub Date : 2025-07-08 DOI: 10.1038/s44172-025-00456-9

Jindong Bai, Wenhang Yang, Shouzheng Zhu, Haijun Jin, Yuchen Zhang, Ke Jin, Xiaoshuai Liu, Chunlai Li, Jianyu Wang, Hongxing Qi, Shijie Liu

{"title":"A high-precision 1 × 15 infrared temperature measurement linear array based on thermopile sensors.","authors":"Jindong Bai, Wenhang Yang, Shouzheng Zhu, Haijun Jin, Yuchen Zhang, Ke Jin, Xiaoshuai Liu, Chunlai Li, Jianyu Wang, Hongxing Qi, Shijie Liu","doi":"10.1038/s44172-025-00456-9","DOIUrl":"10.1038/s44172-025-00456-9","url":null,"abstract":"In applications such as those in the semiconductor industry, precise temperature measurements with low power consumption are crucial. This article presents a novel noncontact temperature measurement method with low power consumption and high precision, and a thermopile sensor-based linear array for surface temperature measurements is used in semiconductor manufacturing and temperature calibration applications. The array consists of 15 thermopile sensors, a negative temperature coefficient (NTC) thermistor, an FPGA control board with a fiber optic interface, and a motion module. Moreover, the total power consumption of the board is less than 1.5 W. On the FPGA control board, a multiparameter temperature compensation algorithm is used to address intrinsic temperature differences and consistency errors among the sensors. Compared with the traditional two-point calibration method, the temperature measurement accuracy of the proposed method reaches 26 mK in the temperature range of 293-303 K, the maximum repeatability error of the sensor is less than 5.5 mK, and the non-uniformity error between 15 sensors is less than 11.9 mK. The array and its replicas were subjected to more than 6 h of rigorous testing, demonstrating their high stability, with the reduction in accuracy not exceeding 1.5 mK.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"4 1","pages":"119"},"PeriodicalIF":0.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12234851/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144585757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable reinforcement learning for large-scale coordination of electric vehicles using graph neural networks. 基于图神经网络的电动汽车大规模协调的可扩展强化学习。

Communications engineering Pub Date : 2025-07-01 DOI: 10.1038/s44172-025-00457-8

Stavros Orfanoudakis, Valentin Robu, E Mauricio Salazar, Peter Palensky, Pedro P Vergara

{"title":"Scalable reinforcement learning for large-scale coordination of electric vehicles using graph neural networks.","authors":"Stavros Orfanoudakis, Valentin Robu, E Mauricio Salazar, Peter Palensky, Pedro P Vergara","doi":"10.1038/s44172-025-00457-8","DOIUrl":"10.1038/s44172-025-00457-8","url":null,"abstract":"As the adoption of electric vehicles (EVs) accelerates, addressing the challenges of large-scale, city-wide optimization becomes critical in ensuring efficient use of charging infrastructure and maintaining electrical grid stability. This study introduces EV-GNN, a novel graph-based solution that addresses scalability challenges and captures uncertainties in EV behavior from a Charging Point Operator's (CPO) perspective. We prove that EV-GNN enhances classic Reinforcement Learning (RL) algorithms' scalability and sample efficiency by combining an end-to-end Graph Neural Network (GNN) architecture with RL and employing a branch pruning technique. We further demonstrate that the proposed architecture's flexibility allows it to be combined with most state-of-the-art deep RL algorithms to solve a wide range of problems, including those with continuous, multi-discrete, and discrete action spaces. Extensive experimental evaluations show that EV-GNN significantly outperforms state-of-the-art RL algorithms in scalability and generalization across diverse EV charging scenarios, delivering notable improvements in both small- and large-scale problems.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"4 1","pages":"118"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12216737/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144546336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Triple-chord trussed submerged floating tunnels: hybrid construction concept, feasibility and design. 三弦桁架水下浮动隧道：混合施工概念、可行性与设计。

Communications engineering Pub Date : 2025-07-01 DOI: 10.1038/s44172-025-00454-x

Fa-Cheng Wang, Tao Zhuge, Zheng-Qing Cheng, Lin-Hai Han, Jian-Min Zhang, Leroy Gardner

{"title":"Triple-chord trussed submerged floating tunnels: hybrid construction concept, feasibility and design.","authors":"Fa-Cheng Wang, Tao Zhuge, Zheng-Qing Cheng, Lin-Hai Han, Jian-Min Zhang, Leroy Gardner","doi":"10.1038/s44172-025-00454-x","DOIUrl":"10.1038/s44172-025-00454-x","url":null,"abstract":"Submerged floating tunnels (SFT) offer a promising solution for deep-water crossings and intercontinental transportation. However, current SFT designs struggle to meet the high structural performance demands associated with the harsh service environments while remaining economically viable, thus limiting their implementation in practice. Here, we propose a conceptual SFT design using a triple-chord trussed concrete-filled double-skin tubular (CFDST) hybrid structure, featuring CFDST chords and hollow steel tubular braces. This design is highly adaptable and allows the steel tubes and sandwiched concrete to work synergistically, achieving efficiency in withstanding multiple loading conditions including lateral flow, internal fire, fatigue and impact loading. We further develop a multi-scale structural analysis methodology that integrates three-dimensional solid finite element (3-D FE) and simplified fibre modelling for the efficient evaluation of global deformations, fire performance and joint behaviour. The results demonstrate that the proposed design leads to considerably enhanced resistance against lateral flow loading, vibrations and internal fire, and is more adaptable and cost-effective than existing solutions.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"4 1","pages":"117"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12217642/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144546337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the limitations of closed-loop geothermal systems for electricity generation outside high-geothermal gradient fields. 高地温梯度田外发电闭环地热系统的局限性。

Communications engineering Pub Date : 2025-07-01 DOI: 10.1038/s44172-025-00458-7

Sri Kalyan Tangirala, Víctor Vilarrasa

引用次数: 0