Communications engineering最新文献_第4页

Thermo-mechanical behavior and thermal regulation measures of subgrade layer in roads under stochastic periodic thermal disturbance. 随机周期性热扰动下道路路基层热力学行为及热调节措施

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Communications engineering Pub Date : 2026-07-03 DOI: 10.1038/s44172-026-00719-z

Gaosheng Li, Xiangtian Xu, Yundong Zhou, Yuqin Zhao, Ruiqiang Bai, Weidong Zhang, Yusong Lin

{"title":"Thermo-mechanical behavior and thermal regulation measures of subgrade layer in roads under stochastic periodic thermal disturbance.","authors":"Gaosheng Li, Xiangtian Xu, Yundong Zhou, Yuqin Zhao, Ruiqiang Bai, Weidong Zhang, Yusong Lin","doi":"10.1038/s44172-026-00719-z","DOIUrl":"https://doi.org/10.1038/s44172-026-00719-z","url":null,"abstract":"The characteristics of frost damage of highways under hydrothermal conditions are driven by large temperature differences, high soil moisture content, and disparities in both the temporal and spatial distribution of snow depth. The ground surface temperature (GST) model, which characterizes random dynamic variations in snow depth, was coupled with a thermal-hydro-mechanical model of frozen soil. Utilizing the coupled model, variations in GST and heat flux across six snow depth scenarios were computed, along with the evolution of the subgrade temperature field and pavement deformation. Furthermore, the response of the thermal state of the ground surface and the thermal behavior of the subgrade to fluctuations in four snow depth ranges were systematically examined, and the influence mechanism of snow on the subgrade thermal stability was revealed. In view of the preceding analysis, a comparison and evaluation were made of the regulatory effects of conventional and improved thermal regulation measures on the deformation characteristics of the subgrade top surface, under conditions of two extreme snow depths and four snow depth fluctuation ranges. This study provides direct guidance for the control of frost damage in snow-covered permafrost subgrades subjected to stochastic periodic thermal disturbances.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383374","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 robust GaN p-FET with unconventional electron conduction. 具有非常规电子传导的稳健GaN p-FET。

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Communications engineering Pub Date : 2026-07-03 DOI: 10.1038/s44172-026-00717-1

Mohit Kumar, Laurent Xu, Timothée Labau, Jérôme Biscarrat, Simona Torrengo, Christophe Lecouvey, Matthew Charles, Caroline Elias, Aurélien Olivier, Estelle Chanel Petitjean, Zineb Saghi, Joelle Zgheib, René Escoffier, Julien Buckley

{"title":"A robust GaN p-FET with unconventional electron conduction.","authors":"Mohit Kumar, Laurent Xu, Timothée Labau, Jérôme Biscarrat, Simona Torrengo, Christophe Lecouvey, Matthew Charles, Caroline Elias, Aurélien Olivier, Estelle Chanel Petitjean, Zineb Saghi, Joelle Zgheib, René Escoffier, Julien Buckley","doi":"10.1038/s44172-026-00717-1","DOIUrl":"https://doi.org/10.1038/s44172-026-00717-1","url":null,"abstract":"GaN p-channel field-effect transistors (p-FETs) are critical for enabling complementary integration of power and logic, while offering high breakdown capability. However, achieving high on-current in GaN p-FETs remains a significant challenge, primarily due to the low hole concentration, poor mobility, and challenges in forming stable, low-resistance ohmic contacts. Here, we present a novel GaN p-FET architecture that exhibits unconventional electron conduction, which helps enhance both thermal response and current modulation. We conduct a comprehensive investigation of heavily Mg-doped p++-GaN layers, focusing on contact optimization for high-temperature operation. Structural and interfacial characterization confirms high crystal quality and a thermally robust Ni/Au contact stack stabilized by an interfacial NixOy layer. This strategic interfacial layer, combined with moderate-temperature annealing, promotes Mg activation and suppresses oxygen-related traps, resulting in a ~ 73% reduction in contact resistance. Temperature-dependent analysis further reveals non-monotonic Schottky barrier modulation driven by interface evolution. Integrated into the device, this contact strategy enables thermally enhanced operation, with a drastically increase in on-state current and threshold voltage shifting positively by ~ 69% with temperature. These findings highlight a model shift in GaN p-FET design, where interface study and transport-mode innovation enable high-performance, thermally resilient devices for next-generation power integration.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383317","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

Network architecture follows coupling in multiphysics systems: single vs. multiple branches in DeepONet and S-DeepONet. 网络架构遵循多物理场系统中的耦合：DeepONet和S-DeepONet中的单个与多个分支。

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Communications engineering Pub Date : 2026-07-03 DOI: 10.1038/s44172-026-00714-4

Jaewan Park, Kazuma Kobayashi, Qibang Liu, Diab Abueidda, Seid Koric, Syed Bahauddin Alam

{"title":"Network architecture follows coupling in multiphysics systems: single vs. multiple branches in DeepONet and S-DeepONet.","authors":"Jaewan Park, Kazuma Kobayashi, Qibang Liu, Diab Abueidda, Seid Koric, Syed Bahauddin Alam","doi":"10.1038/s44172-026-00714-4","DOIUrl":"https://doi.org/10.1038/s44172-026-00714-4","url":null,"abstract":"Real-time prediction of complex physical systems requires surrogate models that learn from data while representing strong multiphysics coupling. Deep Operator Networks have shown success in single-physics problems, yet their effectiveness in capturing nonlinear interactions in coupled systems (such as thermo-mechanical or electro-thermal coupling) remains underexplored. Here we pose a practical question: should the architecture of a neural operator reflect the strength of physical coupling it aims to model? We compare single-branch and multi-branch designs, in both feedforward and sequential recurrent forms, across three representative systems: a reaction-diffusion problem with heterogeneous sources, a nonlinear thermo-electrical problem with temperature-dependent conductivity and Joule heating, and a viscoplastic thermo-mechanical model of steel solidification. Single-branch networks consistently outperform multi-branch variants in tightly coupled regimes by encouraging shared latent representations, whereas multi-branch designs remain favorable for decoupled or single-physics tasks. Once trained, these surrogates deliver full-field predictions up to 1.8 × 104 times faster than physics-based solvers.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383320","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

Bubble-raft inspired shape-assembly in flying robot swarm for uniform formation and obstacle traversal. 基于气泡筏的飞行机器人群形状组合方法。

IF 7

Communications engineering Pub Date : 2026-07-02 DOI: 10.1038/s44172-026-00715-3

Hanxun Li, Jinshu Su, Zhiqiang Li, Yining Zhao, Tingyu Chen, Biao Han

{"title":"Bubble-raft inspired shape-assembly in flying robot swarm for uniform formation and obstacle traversal.","authors":"Hanxun Li, Jinshu Su, Zhiqiang Li, Yining Zhao, Tingyu Chen, Biao Han","doi":"10.1038/s44172-026-00715-3","DOIUrl":"https://doi.org/10.1038/s44172-026-00715-3","url":null,"abstract":"Natural swarms can move cohesively while continuously reshaping their spatial shape, yet reproducing this behavior with large flying robot swarms in obstacle environments remains difficult, especially in achieving uniformity and safety. Here, we present a distributed 3D shape-assembly controller for flying robot swarms that forms arbitrary target shapes with uniform coverage and safe inter-robot distance. Inspired by bubble-rafts, each robot is associated with a non-overlapping region inside the target shape and updates its velocity by considering region exploration, region balancing and distance fine-tuning. The proposed region-based shape-assembly method is able to drive the swarm toward uniform formations and enable fast shape transformation, as well as resilience to robot joining and failure. For navigation, we design a lightweight velocity-obstacle mechanism that adjusts the nominal shape-assembly velocity to collision-free commands with minimal formation disruption. We validate the proposed methods in extensive simulations and real-world swarm experiments, demonstrating efficient formation of complex 3D shapes, robust maintenance of safety distances, and reliable obstacle traversal.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148378288","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

Mobile charges in MoS₂/high-k oxide transistors: from abnormal instabilities to transient negative differential resistance. MoS2/高k氧化物晶体管中的移动电荷：从异常不稳定到瞬态负差分电阻。

IF 7

Communications engineering Pub Date : 2026-07-02 DOI: 10.1038/s44172-026-00716-2

Shaokai Zhou, Haihui Cai, Yehao Wu, Yufeng Min, Renchen Yuan, Yezhu Lv, Jianming Huang, Yuanyuan Shi, Yury Yuryevich Illarionov

{"title":"Mobile charges in MoS2/high-k oxide transistors: from abnormal instabilities to transient negative differential resistance.","authors":"Shaokai Zhou, Haihui Cai, Yehao Wu, Yufeng Min, Renchen Yuan, Yezhu Lv, Jianming Huang, Yuanyuan Shi, Yury Yuryevich Illarionov","doi":"10.1038/s44172-026-00716-2","DOIUrl":"10.1038/s44172-026-00716-2","url":null,"abstract":"Molybdenum disulfide (MoS2) field-effect transistors with high-k oxides lag behind silicon standards in stability due to traps causing clockwise hysteresis. While suppressing this effect is mandatory for logic devices, here we show an alternative strategy where initial hysteresis is dynamically overcome by stronger counterclockwise hysteresis coupled with memory-like transient negative differential resistance. We compare back-gated transistors using HfO2 and Al2O3 gate insulators up to 275 °C. At 175 °C, devices with HfO2 exhibit dominant counterclockwise dynamics and transient negative differential resistance. Our compact model suggests this behavior is caused by the drift of mobile oxygen vacancies within HfO2. This mechanism overrides initial hysteresis, revealing a pathway to memory-like functionality enhanced by narrower voltage sweep ranges. In contrast, transistors gated with Al2O3 display only minor counterclockwise dynamics even at 275 °C due to higher vacancy migration barriers, maintaining superior stability. Our results reveal an insulator selection paradigm: Al2O3 is better suited for logic devices, whereas HfO2 counterparts can serve as active layers for memory components.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13333013/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148378300","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

Enhanced magnetic moment discrimination for multiplex nanoparticle quantification via dual-frequency nonlinearity probing. 基于双频非线性探测的多纳米粒子定量磁矩识别增强方法。

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Communications engineering Pub Date : 2026-06-30 DOI: 10.1038/s44172-026-00713-5

Timur I Bikulov, Ulrich M Engelmann, Andreas Offenhäusser, Hans-Joachim Krause

{"title":"Enhanced magnetic moment discrimination for multiplex nanoparticle quantification via dual-frequency nonlinearity probing.","authors":"Timur I Bikulov, Ulrich M Engelmann, Andreas Offenhäusser, Hans-Joachim Krause","doi":"10.1038/s44172-026-00713-5","DOIUrl":"10.1038/s44172-026-00713-5","url":null,"abstract":"Advanced applications of Magnetic nanoparticles (MNPs) in biomedicine based on multiplex MNP distinction require accurate, model-agnostic characterization of their magnetic moment distributions (MMDs). However, the resolving power of conventional MMD reconstruction from a static magnetization curve remains literarily underexplored. Moreover, due to particle-particle interactions, the response of the particle mixture might differ from the linear combination of the original constituents. We explore resolution enhancement in magnetic-moment space by directly probing higher-order magnetization derivatives, benefiting from their ever-increasing field-domain localization. Nonetheless, the direct derivative probing, as it is inevitably conducted dynamically, poses an interpretive problem for the origin of the nonlinearities. Spectral symmetries arising solely under dual-frequency excitation reflect the corresponding origins of amplitude- and rate-related nonlinearities. Using a dedicated experimental setup capable of synchronous demodulation of intermodulation terms, the method is tested on commercial MNP samples and benchmarked with conventional AC-susceptometry and static magnetization data. The binary mixture ratio was quantified with 8.9% deviation, without any prior information about the initial constituents differing by a factor of 3 in their average magnetic moments, potentially allowing the accommodation of three independent contrast channels for multiplex MNP applications as well as qualitatively probing magnetic interaction effects.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":"5 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13319186/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148364117","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

Ultrahigh-speed micromachining of sapphire by enhancing laser absorption. 增强激光吸收的蓝宝石超高速微加工。

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Communications engineering Pub Date : 2026-06-25 DOI: 10.1038/s44172-026-00711-7

Guoqi Ren, Huijie Sun, Chaoran Wei, Yusuke Ito

{"title":"Ultrahigh-speed micromachining of sapphire by enhancing laser absorption.","authors":"Guoqi Ren, Huijie Sun, Chaoran Wei, Yusuke Ito","doi":"10.1038/s44172-026-00711-7","DOIUrl":"10.1038/s44172-026-00711-7","url":null,"abstract":"Fine micromachining of sapphire using ultrafast lasers via nonlinear absorptions has been extensively studied. However, severe damage, along with the low material removal rate, limits the precision and machining speed. Here we use transient and selective laser processing for sapphire by coaxially delivering a single femtosecond laser pulse and a single microsecond laser pulse that are temporally synchronized. It shows that the micromachining speed was improved 104 times, and cracks in the base material are mitigated, compared to femtosecond laser percussion processing with a repetition rate of 1 kHz. The ultrafast electron excitation dynamics induced by the femtosecond laser are captured using pump-probe imaging, revealing a rapid relaxation process with a decay time constant on the order of picoseconds. The machining process is further visualized using a high-speed camera and compared with numerical simulations to elucidate the underlying mechanism. We find that the increased absorption coefficient of sapphire for the microsecond laser pulse, owing to the bandgap narrowing and thermal ionizations, along with high-temperature regions expanding from the sample surface into deeper areas along the laser propagation path, drives the machining process. These results advance high-efficiency and precision micromachining for sapphire and other hard and brittle transparent materials.","PeriodicalId":72644,"journal":{"name":"Communications engineering","volume":" ","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13669347/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148335071","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

Operating smart grids by customizing large model agents. 通过定制大型模型代理来运行智能电网。

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Communications engineering Pub Date : 2026-06-24 DOI: 10.1038/s44172-026-00709-1

Hanjiang Dong, Haosen Yang, Yuwang Miao, Jizhong Zhu, Kwok Cheung, Haojun Hua, Chao Sun, Shenglin Li, Ziqiang Wang, Chi-Yung Chung

引用次数: 0

Industry-Academia Interface: Exploring the growth of Additive Manufacturing as an industry with Laura Del Río Fernández. 产学界面：与Laura Del一起探讨增材制造作为一个行业的发展Río Fernández。

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Communications engineering Pub Date : 2026-06-23 DOI: 10.1038/s44172-026-00694-5

引用次数: 0

Photovoltaics for space applications. 空间应用光伏。

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Communications engineering Pub Date : 2026-06-23 DOI: 10.1038/s44172-026-00701-9

Mei Gao, Narges Yaghoobi Nia, Nina Vaidya

引用次数: 0