Communications engineering最新文献_第3页

A quasi-two-stage heat pump for efficient dual-temperature supply-space heating and domestic hot water. 一种准两级热泵，用于高效的双温度空间供热和生活热水。

IF 7

Communications engineering Pub Date : 2026-07-21 DOI: 10.1038/s44172-026-00739-9

Zahra Hajabdollahi Ouderji, Muhammad Abid, Zhibin Yu

{"title":"A quasi-two-stage heat pump for efficient dual-temperature supply-space heating and domestic hot water.","authors":"Zahra Hajabdollahi Ouderji, Muhammad Abid, Zhibin Yu","doi":"10.1038/s44172-026-00739-9","DOIUrl":"https://doi.org/10.1038/s44172-026-00739-9","url":null,"abstract":"Heat pumps play a critical role in delivering space heating and domestic hot water in residential buildings. However, managing these two demands efficiently remains a technical challenge, especially when high water temperatures are required. This study introduces a dual-mode flexible heat pump operating in two distinct modes: during charging mode, it provides space heating while recovering heat from the refrigerant into an integrated latent thermal energy storage unit. During discharging mode, this stored energy supplies domestic hot water at higher temperatures. A performance analysis was carried out using refrigerants under different domestic hot water demand levels and space heating temperatures. Propane achieved a power reduction of 13.2% compared to a standard system at a 22% domestic hot water share. Further analysis showed that R1234yf delivered the highest power reduction of 14.3%, followed by R1234ze, propane, and isobutane, all within 13.1-13.6%. These maximum reductions were achieved at optimal storage temperatures of 18.0-26.0 °C depending on the refrigerant. The results demonstrate that controlling the storage temperature based on domestic hot water demand share and space heating temperature is essential for optimal performance. The proposed system presents a promising pathway to significantly reduce electricity consumption in residential heating without relying on electric backup heaters.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148551505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbonation-empowered offshore deep cement mixing for undredged land reclamation: micro-scale to in-situ construction. 用于未填埋土地复垦的碳化强化海上深层水泥搅拌：微尺度到原位施工。

IF 7

Communications engineering Pub Date : 2026-07-18 DOI: 10.1038/s44172-026-00728-y

Kesheng Yin, Limin Zhang, Peiliang Shen, Kuijiao Li, Yamei Cai, Suzanne Lacasse, Roland J-M Pellenq, Yanmin Wu, Yeuk Tin Lau, Chi Sun Poon

{"title":"Carbonation-empowered offshore deep cement mixing for undredged land reclamation: micro-scale to in-situ construction.","authors":"Kesheng Yin, Limin Zhang, Peiliang Shen, Kuijiao Li, Yamei Cai, Suzanne Lacasse, Roland J-M Pellenq, Yanmin Wu, Yeuk Tin Lau, Chi Sun Poon","doi":"10.1038/s44172-026-00728-y","DOIUrl":"https://doi.org/10.1038/s44172-026-00728-y","url":null,"abstract":"Offshore deep cement mixing is an essential technique for enhancing marine deposits in undredged land reclamation, tackling the pressing issue of coastal land shortages. This approach relies on a substantial quantity of ordinary Portland cement to produce seawater cement slurry, which stabilizes marine soils in situ at the cost of huge carbon emission. In this study, we propose turning deep cement mixing into a carbon sequestration process, where CO2 is injected into seawater cement slurry to substantially increase the strength, stiffness and density of the improved marine mud. We also evaluate the in situ efficacy of carbonated deep cement mixing for land reclamation, drawing on detailed material properties and on-site construction data from an operational offshore project. We further examine the microstructure, unconfined and confined compression strengths, and shearing characteristics of the stabilized marine soils. These findings are combined with field observations to construct a numerical model, validated by in situ monitoring records, to assess carbonation's impact. The results demonstrate that carbonation enhances hydration products and creates a denser pore structure, significantly improving compression and shear properties. Consequently, this leads to better settlement control, increased bearing capacity, and an added advantage of carbon sequestration, supporting sustainable construction practices.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148498482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable shear-exfoliated graphene for high-performance low-carbon recycled concrete. 用于高性能低碳再生混凝土的可伸缩剪切剥落石墨烯。

IF 7

Communications engineering Pub Date : 2026-07-17 DOI: 10.1038/s44172-026-00732-2

Md Jaynul Abden, Vivian W Y Tam, Jannatul Dil Afroze, K N Le

{"title":"Scalable shear-exfoliated graphene for high-performance low-carbon recycled concrete.","authors":"Md Jaynul Abden, Vivian W Y Tam, Jannatul Dil Afroze, K N Le","doi":"10.1038/s44172-026-00732-2","DOIUrl":"https://doi.org/10.1038/s44172-026-00732-2","url":null,"abstract":"Scalable and sustainable construction materials are essential for decarbonizing the built environment and advancing the circular economy. Here, we present a robust, water-based method for producing defect-free, few-layer graphene via high-shear exfoliation of graphite, using a surface energy-matched solvent and a polycarboxylate stabilizer. Operating at ~8.4×104 s⁻1, the process yields stable graphene dispersions (up to 5 g L⁻¹) compatible with cementitious systems. The resulting shear-exfoliated graphene (SEG) retains a pristine lattice structure and exhibits high colloidal stability, as confirmed by Raman and X-ray photoelectron spectroscopy. When incorporated into recycled concrete aggregate (RCA) concrete, SEG enhances compressive strength by 172.7% and toughness by 120%, while enabling a 40% reduction in cement use and saving 127.3 kg CO2-equivalent per cubic meter. This scalable materials strategy transforms low-grade construction and demolition waste into durable, high-performance structural concrete-offering a practical, low-carbon solution aligned with global climate targets and sustainable infrastructure development.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148474489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Engineered V₂O₅-supported silicomolybdic acid catalysts for butyl butyrate synthesis: kinetic, mechanistic, and thermodynamic insights toward sustainable aviation fuels. 工程v2o5支持的丁酸丁酯合成硅钼酸催化剂：对可持续航空燃料的动力学、机理和热力学见解。

IF 7

Communications engineering Pub Date : 2026-07-14 DOI: 10.1038/s44172-026-00710-8

Shariq Farhan Elahi, Khwaja Alamgir Ahmad, Afaq Ahmad Khan, Hussein Znad, Ejaz Ahmad

{"title":"Engineered V2O5-supported silicomolybdic acid catalysts for butyl butyrate synthesis: kinetic, mechanistic, and thermodynamic insights toward sustainable aviation fuels.","authors":"Shariq Farhan Elahi, Khwaja Alamgir Ahmad, Afaq Ahmad Khan, Hussein Znad, Ejaz Ahmad","doi":"10.1038/s44172-026-00710-8","DOIUrl":"https://doi.org/10.1038/s44172-026-00710-8","url":null,"abstract":"Sustainable aviation fuels (SAFs) have garnered considerable attention worldwide as a renewable alternative to conventional jet fuels due to growing environmental concerns and the urgent need to reduce carbon emissions. This study investigates microwave-assisted esterification for butyl butyrate synthesis, a promising SAF precursor, using silicomolybdic acid-supported on V2O5 (SMA/V2O5) catalysts. The catalysts were synthesized by wet impregnation with varying silicomolybdic acid content (0-40 wt.%) and characterized using multiple techniques. Optimization of the reaction conditions, including calcination temperature, catalyst loading, stirring speed, reaction time, and temperature, led to the identification of the 30 wt.% silicomolybdic acid-supported V2O5 (SMA/V2O5 30-4) as the most effective catalyst, achieving butyric acid conversion up to 95% and butyl butyrate yield 92%. Kinetic analysis revealed pseudo-first-order behavior following the Eley-Rideal mechanism. Thermodynamic parameters, including activation energy (85.77 kJ·mol-1), Gibbs free energy (ΔG* = 103.80 kJ·mol-1), enthalpy (ΔH* = 82.68 kJ·mol-1), and entropy (ΔS* = -55.12 J·mol-1·K-1), were derived from Arrhenius and Eyring plots. The catalyst maintained high activity across five reaction cycles without substantial deactivation. These results confirm the effectiveness of V2O5-supported silicomolybdic acid catalysts in sustainable butyl butyrate production, with potential applications in SAF synthesis.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148450919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A nested-block scalable framework for efficient and equitable urban infrastructure management. 有效和公平的城市基础设施管理的嵌套块可扩展框架。

IF 7

Communications engineering Pub Date : 2026-07-13 DOI: 10.1038/s44172-026-00729-x

Peiyuan Lin, Xiangwei Yu, Tong Liu, Xun Yuan, Chuhao Long, Yang Chen, Haoyi Li, Jun Xiao, Baosong Ma, Linchong Huang, Xian-Xun Yuan

{"title":"A nested-block scalable framework for efficient and equitable urban infrastructure management.","authors":"Peiyuan Lin, Xiangwei Yu, Tong Liu, Xun Yuan, Chuhao Long, Yang Chen, Haoyi Li, Jun Xiao, Baosong Ma, Linchong Huang, Xian-Xun Yuan","doi":"10.1038/s44172-026-00729-x","DOIUrl":"https://doi.org/10.1038/s44172-026-00729-x","url":null,"abstract":"Global cities face mounting challenges in sustaining vast, interdependent infrastructure networks under fiscal and environmental pressures. Conventional optimization methods fail under the dimensional explosion of multi-year maintenance and renewal planning for hundreds of thousands to millions of assets. We present a nested-block optimization framework that decomposes city-wide networks into coordinated sub-blocks, transforming an intractable decision space into a solvable, parallelizable structure while preserving budgetary and temporal constraints. At million-asset scale, the framework achieves rapid convergence and fully feasible plans, far surpassing existing methods in efficiency and scalability. Its architecture unifies diverse assets including roads and pipelines, extends to energy or transit systems, and enables cross-asset, cross-scenario coordination through clustering by district, jurisdiction, or asset class. The framework provides a systematic tool for identifying key evolutionary patterns, evaluating investment pathways, and anticipating system transition conditions, while embedding equity objectives alongside efficiency. These results offer a scientific perspective on urban evolution and practical pathways toward more coordinated, just, and sustainable infrastructure management.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148439239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonlinear dynamic response characteristics of a cube net cage integrated in a jacket foundation at various submerged depths. 不同淹没深度下夹套基础集成方网笼的非线性动力响应特性

IF 7

Communications engineering Pub Date : 2026-07-13 DOI: 10.1038/s44172-026-00730-4

Yuan-Mao Zhang, Chun-Wei Bi

引用次数: 0

MIMO-enhanced talkative power conversion: a perspective. mimo增强的会话功率转换：一个视角。

IF 7

Communications engineering Pub Date : 2026-07-10 DOI: 10.1038/s44172-026-00720-6

Peter A Hoeher, Yang Leng, Rongwu Zhu

引用次数: 0

Bridging the p-type gap in oxide electronics with 2D semiconductors. 用二维半导体弥合氧化物电子学中的p型缺口。

IF 7

Communications engineering Pub Date : 2026-07-07 DOI: 10.1038/s44172-026-00723-3

Taikyu Kim, Seokhyun Hwang, Jae Kyeong Jeong

引用次数: 0

Rockburst-inspired controlled spontaneous fragmentation of hard rock via ultra-high frequency particle impact. 岩爆激发的受控自发破碎的硬岩石通过超高频粒子冲击。

IF 7

Communications engineering Pub Date : 2026-07-06 DOI: 10.1038/s44172-026-00721-5

Yu Zhou, Lingkai Jin, Qiongqiong Tang, Guansheng Han, Hongyu Wang, Qinyuan Liang, Faquan Wu

{"title":"Rockburst-inspired controlled spontaneous fragmentation of hard rock via ultra-high frequency particle impact.","authors":"Yu Zhou, Lingkai Jin, Qiongqiong Tang, Guansheng Han, Hongyu Wang, Qinyuan Liang, Faquan Wu","doi":"10.1038/s44172-026-00721-5","DOIUrl":"https://doi.org/10.1038/s44172-026-00721-5","url":null,"abstract":"Harnessing rockburst-the spontaneous fragmentation of high strain-energy hard rock-is a promising strategy for efficiently breaking hard rock in the high in situ stress environments of the deep Earth. However, safely controlling this spontaneous process remains a formidable challenge. Here, we demonstrate a method that uses an ultrasonic vibration field to actuate small-scale steel particles, generating ultra-high-frequency point-load impacts on exceptionally hard rock (unconfined compressive strengthå 150 MPa). These repeated, high-stress impacts rapidly initiate localized damage, which triggers a cascading release of the rock's intrinsic strain energy and leads to spontaneous fragmentation. Crucially, the process remains highly controllable: the rapid attenuation of the ultra-high-frequency action and the small localized influencing area confine the damage zone, ensuring safe and efficient spontaneous operation. Quantitatively, using our proposed Relative Comprehensive Damage Rate index, our findings indicate a 161.7% increase in rock fragmentation efficiency at 80 MPa confining pressure compared to the unconfined case, without any increase in external energy input. Our work thus demonstrates a strategy to safely harness the immense stored energy within deep rock, transforming a geological hazard into a highly efficient excavation tool.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148400112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ enhancement of autotrophic nitrogen removal in coking wastewater using staged diatomite and pyrite strategy. 硅藻土-黄铁矿分级原位强化焦化废水自养脱氮研究。

IF 7

Communications engineering Pub Date : 2026-07-04 DOI: 10.1038/s44172-026-00718-0

Zhiqi Ren, Jiaying Ma, Pei Ding, Huaqiang Chu, Xuefei Zhou, Yalei Zhang

{"title":"In-situ enhancement of autotrophic nitrogen removal in coking wastewater using staged diatomite and pyrite strategy.","authors":"Zhiqi Ren, Jiaying Ma, Pei Ding, Huaqiang Chu, Xuefei Zhou, Yalei Zhang","doi":"10.1038/s44172-026-00718-0","DOIUrl":"https://doi.org/10.1038/s44172-026-00718-0","url":null,"abstract":"Due to toxicity inhibition and high external carbon costs, anaerobic/anoxic/oxic technologies for coking wastewater require efficient, low-carbon alternatives. Here we develop a strategy to effectively enhance the autotrophic nitrogen removal process in coking wastewater through a phased addition of diatomite porous material and an inorganic electron donor. Under long-term operation, diatomite increased biomass by 86% and induced micro-granular sludge with an average size of 196 μm. Nitrogen removal pathway analysis showed a shift from heterotrophic to autotrophic mode. Ultimately, SCN-- and FeS2-driven autotrophic denitrification contributed 25.6% and 27.9%, respectively. Enrichment of autotrophic sulfur-oxidizing nitrate-reducing bacteria, such as Sulfuritalea and Sulfurisoma, provided strong evidence. Additional pyrite supplementation ultimately increased total nitrogen removal from 77.7% to over 94.0% without external carbon. This study enhanced the in-situ autotrophic process of conventional systems for coking wastewater, offering a cost-effective pathway for energy-saving and carbon-reduction goals.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148388486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0