检索结果-内蒙古大学图书馆

Joint optimization of VNF deployment and UAV trajectory planning in Multi-UAV-enabled mobile edge networks

COMPUTER NETWORKS 2025年 262卷

作者： Liang, Junbin he, qiao Guangxi Univ Sch Comp Elect & Informat Guangxi Key Lab Multimedia Commun & Network Techno Nanning 530004 Peoples R China

Multi-Unmanned Aerial Vehicle (UAV)-enabled mobile edge networks have emerged as a promising networking paradigm that uses multiple UAVs with limited communication and computation capacities as edge servers to traverse along planned trajectories to visit designated ground users (GUs) for providing network services in partial or no network coverage areas, e.g., disaster areas. Based on network virtualization technology, network services can be flexibly provisioned as virtual network functions (VNFs) deployed at the UAVs. However, given a set of UAVs with initial locations and a set of VNF requests from different GUs on different locations, how to deploy the on-demand VNFs on the limited-capacities UAVs with consideration that which UAV should carry which VNFs to serve which requests, and then plan trajectories for each UAV to visit their target GUs to complete its serving task, aiming to minimize both the energy consumption of the UAVs and the cost of UAVs accepting requests, is a challenging problem, where the cost UAVs accepting requests is composed of the instantiation cost of deploying VNFs and the computing cost of processing GU requests in the VNFs. In this paper, since the VNF deployment and the UAV trajectory planning have coupling effect, we focus on joint optimization of the two operations. We firstly formulate it as a nonconvex mixed integer non-linear programming problem. Then, we propose a hierarchical hybrid deep reinforcement learning algorithm based on jointly optimizing discrete and continuous action to solve the problem. Finally, we evaluate the performance of the proposed algorithm and the simulation results demonstrate its effectiveness.

关键词： Multi-UAV-enabled mobile edge networks VNF deployment Trajectory optimization Joint optimization Deep reinforcement learning Hierarchical hybrid actions

来源：评论

学校读者我要写书评

暂无评论

Collaborative learning with normalization augmentation for domain generalization in time series classification

引用

JOURNAL OF SUPERCOMPUTING 2025年第1期81卷 1-30页

作者： he, Qi-qiao Gong, Xueyuan Si, Yain-Whar Foshan Univ Sch Comp Sci & Artificial Intelligence Foshan Guangdong Peoples R China Jinan Univ Sch Intelligent Syst Sci & Engn Zhuhai Guangdong Peoples R China Univ Macau Dept Comp & Informat Sci Taipa Peoples R China

Deep neural networks often experience performance degradation when evaluated on testing (target) data that exhibit different distributions compared to the training (source) data. To solve the issue, Domain Generalization (DG) approaches were proposed by researchers to learn models that demonstrate robustness to domain shift. These models were trained on the data from source domains without accessing data from the target domains. Besides, the existing Normalization-based DG methods capture augmented and original styles through a single deep learning model, hindering the effective learning of these distinct style variations. Therefore, to effectively learn the augmented styles while preserving the original styles of source domains, a novel framework called Collaborative Learning with Normalization Augmentation (CLNA) is proposed for time series data in this paper. To validate the superiority of our proposed framework, CLNA was compared to seven state-of-the-art methods on three publicly available time series datasets. These experiments were conducted for both single-source and multi-source Domain Generalization problems. Experimental results showed that CLNA achieves significantly improved classification accuracy compared to existing approaches.

关键词： Normalization augmentation Collaborative learning Time series classification Domain generalization

来源：评论

学校读者我要写书评

暂无评论

Reversible stress-induced doping and charge trap generation in IDT-BT EGOFETs

引用

JOURNAL OF MATERIALS CheMISTRY C 2025年第8期13卷 3815-3824页

作者： Luukkonen, Axel Jern, Jonas he, qiao heeney, Martin Oesterbacka, Ronald Abo Akad Univ Fac Sci & Engn Henrikinkatu 2 Turku 20500 Finland Imperial Coll London Dept Chem London W12 0BZ England Imperial Coll London Ctr Processable Elect London W12 0BZ England King Abdullah Univ Sci & Technol KAUST KAUST Solar Ctr KSC Phys Sci & Engn Div PSE Thuwal 239556900 Saudi Arabia

Electrolyte-gated organic field-effect transistors (EGOFETs) have great potential for highly sensitive and affordable biosensors due to their low operating voltages and adaptable device geometry, facilitated by the large double layer capacitance in the electrolyte. While high performance biosensors have been attained using a variety of materials and device structures, the operational stability of EGOFETs remains poorly understood. Polythiophenes such as P3HT and pBTTT are the most commonly used organic semiconductors in these devices owing to their high hydrophobicity and well-known film and transport properties. However, in conventional OFETs they have been surpassed both with regards to performance and stability. Poly[2,1,3-benzothiadiazole-4,7-diyl-co-4,4,9,9-tetrahexadecyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b ']dithiophene-2,7-diyl] (IDT-BT) is a donor-acceptor copolymer and one of the best performing and most stable OFET materials. While it has been shown to work in an EGOFET setting as well, the long-term operational stability of such devices, crucial to their eventual application in clinical settings, is poorly understood. In this work, we show that IDT-BT based EGOFETs undergo reversible stress-induced doping, but that they nonetheless achieve a high degree of operational stability and a lifetime in excess of 100 hours under bias. Furthermore, we observe that long-term performance degradation is connected to semiconductor surface changes, seen as increased roughness and reduction in capacitance.

关键词： Organic field effect transistors

来源：评论

学校读者我要写书评

暂无评论

Association between physical frailty and social support in community-dwelling older adults: A systematic review

引用

ARCHIVES OF GERONTOLOGY AND GERIATRICS 2025年 133卷 105826-105826页

作者： Dou, Xiaofan Yao, Lifeng Xu, Hai Yan, Ruijian Dai, Nannan he, qiao Hangzhou Med Coll Zhejiang Prov Peoples Hosp Affiliated Peoples Hosp Ctr Rehabil MedDept Orthoped Hangzhou Zhejiang Peoples R China Zhejiang Univ Tradit Chinese Med Hangzhou Hosp Tradit Chinese Med Dept Orthoped & Traumatol Hangzhou Zhejiang Peoples R China Hangzhou Normal Univ Sch Nursing Hangzhou Zhejiang Peoples R China Jinhua Municipal Cent Hosp Dept Colorectal Surg Med Grp Jinhua Zhejiang Peoples R China

Introduction: Older adults with frailty have an increased likelihood of unmet care needs, falls and fractures and so on, which brings serious burdens to society. By evaluating the association between physical frailty and social support in community-dwelling older adults, we will provide reference for preventing the occurrence of frailty. Methods: Cross-sectional and longitudinal studies on association between frailty and social support in community-dwelling older adults were mainly searched from the database of Medline, Embase, PsycINFO, CINAHL Plus and Web of Science from their establishment to February 16, 2024. After literature screening, two researchers completed data extraction, and the risk of bias was assessed using the 8-item Joanna Briggs Institute Critical Appraisal Checklist for Analytical Cross-Sectional Studies for cross-sectional studies and the NewcastleOttawa Scale for Cohort Studies for longitudinal studies. Results: The study included a total of 14 articles, including 9 cross-sectional studies and 5 longitudinal studies. There was no clear consensus on the correlation between social support and frailty among community-dwelling older adults. The overall quality of the included studies was very high. Conclusion: Although the correlation between social support and frailty among community-dwelling older adults needs further verification, given the important role of social support, it is still recommended that family members provide multi-faceted social support, especially subjective support, for older adults.

关键词： Frailty Social support Aged Systematic review

来源：评论

学校读者我要写书评

暂无评论

Actuation performance of MXenes in response to moisture gradients: A systematic investigation

引用

TALANTA 2025年 286卷 127349页

作者： Su, heng Liu, Chuanfang Xu, Huajun qiao, he Xiao, Meng Zhao, Zhenxuan Gao, Yu Liang, hengnan Jilin Univ Coll Phys Key Lab Phys & Technol Adv Batteries Minist Educ Changchun 130012 Peoples R China Hunan Univ Sci & Technol Sch Mat Sci & Engn Hunan Prov Key Lab Adv Mat New Energy Storage & Co Xiangtan 411201 Peoples R China

Humidity-responsive actuators (HRA) have garnered significant interest across various domains. Since 2020, MXene have been extensively studied for their potential in HRA, demonstrating remarkable performance. Thus far, more than 70 MXene materials have been found. However, no systematic research regarding the distinctions in their applications in the field of HRA has been carried out, limiting the exploration of their broader potential. herein, a systematic investigation of the HRA performance within the MXene (Nb2CTx, V2CTx, Ti3C2Tx, and Nb4C3Tx) family has been conducted. The influences of atomic layer number, oxygen content, transition metal elements, film thickness, and moisture gradient on the actuation performance are thoroughly examined. It is demonstrated that the number of atomic layers plays an indispensably critical role in both the bending angle and the response/recovery time. Nb2CTx and V2CTx with fewer atomic layers show excellent performance. At 50 % relative humidity, their maximum bending angles reach 210 degrees and 202 degrees respectively. The HRA are exemplified by the creation of a bionic butterfly and an intelligent switch, showcasing its broad application potential.

关键词： Humidity-responsive actuators MXenes Atomic layers Surface oxygen content

来源：评论

学校读者我要写书评

暂无评论

Personalized Federated Learning Based Adaptive Optical Compensation for Atmospheric Turbulence

引用

JOURNAL OF LIGHTWAVE TECHNOLOGY 2025年第1期43卷 177-189页

作者： Song, Song he, qiao Liu, Yejun Wu, Po Sun, Qiming Zhao, Lun Wu, Tingwei Guo, Lei Chongqing Univ Posts & Telecommun Sch Commun & Informat Engn Chongqing 400065 Peoples R China Chongqing Univ Posts & Telecommun Inst Intelligent Commun & Network Secur Chongqing 400065 Peoples R China

Free-space optical (FSO) technologies face significant challenges from atmospheric turbulence, which can degrade transmission performance. Adaptive optics (AO) techniques offer a promising solution by compensating for turbulence-induced optical aberrations in real-time. In this paper, we propose a deep learning-based AO compensation scheme utilizing a mixed convolutional channel attention prediction network (MCCA-PNet). The network establishes a mapping relationship between distorted beam intensity information and atmospheric turbulence, enabling real-time compensation on a spatial light modulator. In order to address the challenge of limited datasets across diverse atmospheric conditions, we introduce a personalized federated learning approach named federated layer similarity aggregation algorithm (FedLaySim). The proposed method enables the exchange of feature information while preserving data privacy through the use of a layer similarity algorithm. Compared to conventional local training methods, personalized federated training enhances phase screen prediction accuracy by 1.98 dB. The average mode purity of the compensated vortex beams (VB) reaches 0.96. Furthermore, the applicability of our AO compensation scheme in actual, real-world environments is verified through the use of atmospheric simulation in an environmental chamber.

关键词： Atmospheric modeling Training Predictive models Accuracy Adaptive optics Prediction algorithms Deep learning atmospheric turbulence federated learning free-space optical

来源：评论

学校读者我要写书评

暂无评论

A risk stratification model based on ultrasound radiologic features for cervical metastatic lymph nodes in papillary thyroid cancer

引用

WORLD JOURNAL OF SURGICAL ONCOLOGY 2025年第1期23卷 1-10页

作者： Tan, Hai-Long Duan, Sai-Li he, qiao Zhang, Zhe-Jia Huang, Peng Chang, Shi Cent South Univ Xiangya Hosp Dept Gen Surg Changsha 410008 Hunan Peoples R China Clin Res Ctr Thyroid Dis Hunan Prov Changsha 410008 Hunan Peoples R China Hunan Prov Engn Res Ctr Thyroid & Related Dis Trea Changsha 410008 Hunan Peoples R China Xiangya Hosp Natl Clin Res Ctr Geriatr Disorders Changsha 410008 Hunan Peoples R China

BackgroundAccurate preoperative evaluation for metastatic lesions is significant for PTC patients. However, the stratification systems revealed inconsistencies in the ultrasound (US) features of cervical metastatic lymph nodes (LNs). This study aimed to investigate and develop a risk stratification model based on US radiologic features for cervical metastatic lesions in PTC *** study retrospectively enrolled 1806 LNs from 1665 PTC patients who underwent US-guided fine-needle aspiration biopsy for cervical LNs from January 2010 to December 2022. Univariable and multivariable logistic regression analyses determined and developed the independent risk US features and a risk stratification model for cervical metastatic LNs. The performance of the risk stratification model was assessed and validated by the Korean Society of Thyroid Radiology and the European Thyroid *** the 1806 LNs, 1411 LNs were pathologically diagnosed with malignant. Multivariate analysis indicated that the absence of fatty hilum, cystic components, round shape (SD/LD >= 0.5), abundant vascularity, hyperechogenicity (including hyper and hypo-echogenicity, and hyper-echogenicity), and calcifications (include microcalcification, and macrocalcification) were independent risk US features associated with malignant LNs. A risk stratification model for cervical metastatic LNs was developed based on these suspicious US features and showed well-predicted performance (C-index 0.840;95% CI: 0.840-0.923).ConclusionOur study proposed a new risk stratification system based on US radiologic features to predict cervical metastatic lymph nodes in PTC patients. We identified several risk factors for lymph node (LN) metastasis from PTC including the absence of fatty hilum, cystic components, round shape (SD/LD >= 0.5), abnormal vascularity, hyper-echogenicity, hyper- and hypo-echogenicity, microcalcification, and macrocalcification. These features could serve as valuable indicators

关键词： Papillary thyroid carcinoma Ultrasound Lymph node Risk stratification model

来源：评论

学校读者我要写书评

暂无评论

Evaluation of the efficacy of cell-penetrating monoclonal antibodies targeting intracellular p-NLRP3S295 in alleviating hepatotoxicant-induced NAFLD

引用

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 2025年第Pt 4期308卷 142696页

作者： Wu, Jia-Shen he, Yu-qiao Wei, Yue-Yue Ma, Xin-Yu Zhang, Xin-Yu he, Jie Wang, Lei-Lei he, Jia-Xin Han, Yu Lin, Zhong-Ning Lin, Yu-Chun Xiamen Univ Sch Publ Hlth State Key Lab Vaccines Infect Dis Xiang An Biomed LabState Key Lab Mol Vaccinol & M Xiamen 361102 Peoples R China

NOD-like receptor protein 3 (NLRP3) is a key driver of hepatotoxicant-induced nonalcoholic fatty liver disease (NAFLD). Phosphorylation of NLRP3 at serine 295 (p-NLRP3S295) is crucial for pyroptosis. Monoclonal antibodies (mAbs) have been designed to target extracellular molecules or cell membrane surface receptors and have achieved progress in NAFLD treatment. However, research on mAbs targeting intracellular biomarkers for NAFLD treatment remains limited. In this study, aflatoxin B1 (AFB1), lipopolysaccharide (LPS) combined with ATP, or palmitic acid (PA) were used to induce p-NLRP3S295-dependent pyroptosis and inflammation mediated by lipotoxicity in hepatocytes in vitro. We generated a specific anti-p-NLRP3S295 mAb (14C7) and internalized it into hepatocytes via an enhanced TAT-based intracellular delivery system (eTAT), which inhibited p-NLRP3S295-dependent pyroptosis and inflammation in hepatocytes subjected to simulated lipotoxic injury and in the livers of NAFLD mice. The recombinant mAb@p-NLRP3S295 expression system was constructed with 14C7. The intracellularly expressed recombinant monoclonal antibody (R-mAb) efficiently blocked p-NLRP3S295-dependent pyroptosis and inflammation in hepatocytes exposed to hepatotoxicant through the proteasome degradation pathway mediated by tripartite motif-containing 40 (TRIM40). In conclusion, this study presents a novel approach for the targeted inhibition of p-NLRP3S295 through intracellular recombinant mAbs, offering new insights into the treatment of hepatotoxicant-related NAFLD via specific intracellular targeting.

关键词： hepatic lipotoxic injury inflammation Site-specific monoclonal antibody eTAT intracellular delivery system NAFLD

来源：评论

学校读者我要写书评

暂无评论

Strengthening mechanisms of Cu/SACZ/Al micro-connection joints with solid-state bonding

引用

MICROELECTRONICS INTERNATIONAL 2025年第1期42卷 1-14页

作者： Gan, Guisheng Yang, Hao Luo, Jie Ma, Yongchong Zhang, Jiajun Liu, Xin he, qiao Li, Leqi Cheng, Dayong Chongqing Univ Technol Chongqing Municipal Engn Res Ctr Inst Higher Educ Chongqing Peoples R China Chongqing Vocat & Tech Univ Mechatron Ordnance Equipment Res Inst Chongqing Peoples R China China Merchants Testing Vehicle Technol Res Inst C Chongqing Peoples R China Golden Dragon Precise Copper Tube Grp Inc Chongqing Peoples R China

PurposeThe purpose of this study was to investigate the effects of aging time on the microstructure, mechanical properties and fracture morphology of Cu/Zn160%SAC0307/Al solder joints produced through solid-state ***/methodology/approachZn particles with a size of 1 mu m and Sn-0.3Ag-0.7Cu (SAC0307) particles ranging from 20 to 38 mu m were used to achieve Cu/Al micro-connections using ultrasonic assistance at a temperature of 180 degrees C, followed by aging treatment at 150 degrees C to enhance the quality of Cu/Al joints. Scanning electron microscopy was used for observing and analyzing the solder seam, interface microstructure, and fracture morphology. The structural composition was determined using energy dispersive spectroscopy, while a PTR-1102 bonding tester was used to measure the average shear *** results indicated that the intermetallic compounds formed at the interface between Cu substrates and solder metal primarily consisted of smooth Cu5Zn8. The Al-side interface mainly comprises an Al-Sn-Zn solid solution, with Zn-Sn-Cu phases forming between SAC0307 particles at 180 degrees C. During the aging process, atomic diffusion was accelerated, leading to improved connection quality. The shear strength of the joints initially increased before decreasing as aging time progressed;it peaked at 32.92 MPa after 24 h - an increase of 76.8% compared to as-received joints. After reaching stability at 96 h, there was still a notable increase in shear strength by 48.4% relative to as-received ***/valueThis study further explores the strengthening mechanisms associated with solid-state bonded Cu/SACZ/Al joints through aging processes. Joints created via solid-state bonding demonstrate superior reliability compared to traditional soldered connections. It is anticipated that insights gained from this research will contribute valuable knowledge toward developing low-temperature soldering methodologies for heterogeneous materials.

关键词： Sn-0.3Ag-0.7Cu Aging time Shear strength Ultrasonic-assisted IMCs

来源：评论

学校读者我要写书评

暂无评论

Association Between Frailty and Mortality, Falls and Hospitalisation Among Patients Undergoing Dialysis: A Systematic Review and Meta-Analysis

引用

NURSING OPEN 2025年第2期12卷 e70150页

作者： he, Wan-qiao Zhang, Xiao-Ming Zhang, Yi-Zhen Gai, Wei Wu, Xin-Juan Tao, Yan-Ling Chengdu Integrated TCM & Western Med Hosp Chengdu Sichuan Peoples R China Longgang Cent Hosp Shenzhen Dept Nursing Shenzhen Guangdong Peoples R China Peoples Hosp Baoan Shenzhen Dept Emergency Shenzhen Guangdong Peoples R China Guangzhou Univ Chinese Med Shenzhen Clin Med Coll Shenzhen Guangdong Peoples R China Shaanxi Prov Peoples Hosp Xian Shaanxi Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Peking Union Med Coll Hosp Dept Nursing Dongdan Campus Beijing Peoples R China

AimFrailty is a risk factor for adverse events in older individuals;however, it has not been fully verified in patients undergoing dialysis. Our aim was to verify the association between frailty and adverse outcomes consisting of mortality, falls and hospitalisation among patients undergoing dialysis by a systematic review and *** review and *** internet databases, were searched from the establishment of each database to April 2022, including the PubMed, EMbase, Cochrane, CNKI, WanFang and China Science and Technology Journal (VIP) databases. Cohort studies exploring the association between frailty and adverse outcomes among patients undergoing dialysis were analysed. The Newcastle Ottawa Scale (NOS) was used to assess the risk of bias in the included studies. A random effects model was used to pool the effect size, and comprehensive analyses consisting of subgroup analysis, sensitivity analysis and publication bias were *** search initially identified 2744 studies from six databases. After the screening, 26 studies including 14,089 patients with dialysis aged 44.95-78.10 years were included in the final analysis, all of which were observational cohort studies. The pooled results showed that frailty was a powerful predictor of adverse outcomes (mortality, falls and hospitalisation) among the patients. Therefore, dialysis patients should be screened for early frailty and appropriate interventions should be implemented to improve adverse outcomes.

关键词： dialysis falls frailty hospitalisation mortality

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：