检索结果-南通市图书馆

Scenarios analysis and performance assessment of blockchain integrated in 6G scenarios

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第7期67卷 5-26页

作者： Bo LI Guanjie CHENG Honghao GAO Xueqiang YAN Shuiguang DENG co.lege of computer Science and Technology Zhejiang University co.lege of computer Science and Technology Shanghai University 2012 Lab Huawei Technologies Co. Ltd.

Emerging applications such as smart city infrastructures and virtual reality landscapes are setting rigorous benchmarks for 6G mobile networks, requiring elevated levels of co.fidentiality, integrity, nonrepudiation, authentication, and stringent access co.trols. Blockchain technology is heralded as a transformative enabler for meeting 6G standards, owing to its intrinsic attributes. However, a gap exists in the holistic investigation of blockchain's applicability in 6G realms, particularly addressing the “whether”, “when”, and“how” of its deployment. Present research trails in developing robust methodologies to gauge blockchain's efficacy within 6G use cases. Addressing this, our study introduces a novel co.fluence of blockchain with 6G networks, where data resides in distributed Hash tables(DHTs) while their hashes are secured in distributed ledger technology(DLT), harnessing blockchain's co.e strengths-immutability, traceability, and fortified security. We delineate seven specific 6G use cases poised for enhancement through blockchain integration,and scrutinize the rationale, nature, and timing of this co.vergence. Furthermore, we devise a co.prehensive methodology for assessing blockchain's performance metrics and scalability in 6G environments. Our extensive experimental analyses evaluate the synergistic performance of this integration, revealing that the Quorum blockchain satisfactorily supports 80% of 6G scenarios. The findings suggest that, with appropriate co.figurations, co.sortium blockchains are well-equipped to fulfill the demanding performance and scalability requisites of 6G networks.

关键词： blockchain distributed ledger technology (DLT) 6G performance assessment 6G scenarios analysis transaction arrival rate

同方期刊数据库

Impact Damage Testing Study of Shanxi-Beijing Natural Gas Pipeline Based on Decision Tree Rotary Tiller Operation

在线全文

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2024年第5期18卷 683-706页

作者： Liqiong Chen Kai Zhang Song Yang Duo Xu Weihe Huang Hongxuan Hu Haonan Liu School of Petroleum and Natural Gas Engineering Southwest Petroleum UniversityChengdu610500China National Pipe Network Group southwest Pipeline co. Chengdu610500China

The North China Plain and the agricultural region are crossed by the Shanxi-Beijing natural gas ***-dents in the area use rototillers for planting and harvesting;however,the depth of the rototillers into the ground is greater than the depth of the pipeline,posing a signiﬁcant threat to the safe operation of the ***,it is of great signiﬁcance to study the dynamic response of rotary tillers impacting pipelines to ensure the safe opera-tion of *** article focuses on the Shanxi-Beijing natural gas pipeline,utilizingﬁnite element simulation software to establish aﬁnite element model for the interaction among the machinery,pipeline,and soil,and ana-lyzing the dynamic response of the *** the same time,a decision tree model is introduced to classify the damage of pipelines under different working co.ditions,and the boundary value and importance of each inﬂuen-cing factor on pipeline damage are *** the actual co.ditions in the hemp yam planting area,targeted management measures have been proposed to ensure the operational safety of the Shanxi-Beijing natural gas pipeline in this region.

关键词： Natural gas pipeline rotary tiller operation third-party damage ﬁnite element simulation decision tree model safety management

Aerodynamic Analysis and Optimization of Pantograph Streamline Fairing for High-Speed Trains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2024年第5期20卷 1075-1091页

作者： Xiang Kan Yan Li Tian Li Jiye Zhang State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu610031China Technical Center Southwest Jiaotong University Chengdu Design Institute Co.Ltd.Chengdu610031China

A pantograph serves as a vital device for the co.lection of electricity in ***,its aerodynamic resistance can limit the train’s running *** installing fairings around the pantograph is known to effectively reduce the resistance,in this study,different fairing lengths are co.sidered and the related aerodynamic performances of pantograph are *** particular,this is acco.plished through numerical simulations based on the k-ωShear Stress Transport(SST)two-equation turbulence *** results indicate that the fairing diminishes the direct impact of high-speed airflow on the pantograph,thereby reducing its aerodynamic ***,it also induces interferences in the flow field around the train,leading to variations in the aerodynamic resistance and lift of train *** is shown that a maximum reduction of 56.52%in pantograph aerodynamic resistance and a peak decrease of 3.38%in total train aerodynamic resistance can be achieved.

关键词： Pantograph fairing train aerodynamic numerical simulation

Mobile Crowdsourcing Task Allocation Based on Dynamic Self-Attention GANs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

computers, Materials & co.tinua 2024年第4期79卷 607-622页

作者： Kai Wei Song Yu Qingxian Pan School of computer and co.trol Engineering Yantai UniversityYantai264005China School of computer and Information Science Southwest UniversityChongqing400715China

Crowdsourcing technology is widely reco.nized for its effectiveness in task scheduling and resource *** traditional methods for task allocation can help reduce co.ts and improve efficiency,they may enco.nter challenges when dealing with abnormal data flow nodes,leading to decreased allocation accuracy and *** address these issues,this study proposes a novel two-part invalid detection task allocation *** the first step,an anomaly detection model is developed using a dynamic self-attentive GAN to identify anomalous *** to the baseline method,the model achieves an approximately 4%increase in the F1 value on the public *** the seco.d step of the framework,task allocation modeling is performed using a twopart graph matching *** phase introduces a P-queue KM algorithm that implements a more efficient optimization *** allocation efficiency is improved by approximately 23.83%co.pared to the baseline *** results co.firm the effectiveness of the proposed framework in detecting abnormal data nodes,enhancing allocation precision,and achieving efficient allocation.

关键词： Mobile crowdsourcing task allocation anomaly detection GAN attention mechanisms

Current status and development of CMOS SiPM for scintillator-based radiation detectors toward all-digital sensors[Invited]

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第2期22卷 17-27页

作者： Nico.a D'Ascenzo 胡文韬劳慧华越轩张博房磊奚道明郑睿邱奥 Emanuele Antonecchia 凌怡清刘雨晴李琰俞航肖鹏谢庆国 Wuhan National Laboratory for Optoelectronics Wuhan 430074China Biomedical Engineering Department Huazhong University of Science and TechnologyWuhan 430074China RAYQUANT Technology co. Ltd.Ezhou 436044China RAYSOLUTION Healthcare co. Ltd.Hefei 230000China RAYMEASURE Technology co. Ltd.Suzhou 215000China RAYCAN Technology co. Ltd.Suzhou 215000China co.lege of computer Science and Software Engineering Shenzhen UniversityShenzhen 518060China

Modern scintillator-based radiation detectors require silico. photomultipliers(Si PMs)with photon detection efficiency higher than 40%at 420 nm,possibly extended to the vacuum ultraviolet(VUV)region,single-photon time resolution(SPTR)co.nt rate(DCR)co.centrations at low CMOS scales,deep-level carrier generation in shallow trench isolation fabrication,and power co.sumption,among *** advances at 350 and 110 nm CMOS nodes are benchmarked against available Si PMs obtained in CMOS and co.mercial customized *** co.cept of digital multithreshold Si PMs with a single microcell readout is finally reported,proposing a possible direction toward fully digital scintillator-based radiation detectors.

关键词： silico. photomultiplier co.plementary metal-oxide semico.ductor digital SiPM

Calcium-chelating peptides from rabbit bone co.lagen:characterization,identification and mechanism elucidation

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第3期13卷 1485-1493页

作者： Fuhuan Yuan Yu Fu Liang Ma Hankun Zhu Yong Yu Xin Feng Yi Sun Hongjie Dai Xin Liu Zhengfang Liu Yuhao Zhang co.lege of Food Science Southwest UniversityChongqing 400715China Chongqing Key Laboratory of Speciality Food co.Built by Sichuan and Chongqing Chongqing 400715China Key Laboratory of Luminescence Analysis and Molecular Sensing(southwest University) Ministry of EducationChongqing 400715China Angel Yeast co. Ltd.Yichang 443003China

This study aimed to characterize and identify calcium-chelating peptides from rabbit bone co.lagen and explore the underlying chelating *** peptides and calcium were extracted from rabbit bone by instant ejection steam explosion(ICSE)co.bined with enzymatic hydrolysis,followed by chelation reaction to prepare rabbit bone peptide-calcium chelate(RBCP-Ca).The chelating sites were further analyzed by liquid chromatography-tandem mass(LC-MS/MS)spectrometry while the chelating mechanism and binding modes were *** structural characterization revealed that RBCP successfully chelated with calcium ***,LC-MS/MS analysis indicated that the binding sites included both acidic amino acids(Asp and Glu)and basic amino acids(Lys and Arg),Interestingly,three binding modes,namely Inter-Linking,Loop-Linking and Mono-Linking were for the first time found,while Inter-Linking mode acco.nted for the highest proportion(75.1%),suggesting that chelation of calcium ions frequently occurred between two ***,this study provides a theoretical basis for the elucidation of chelation mechanism of calcium-chelating peptides.

关键词： Rabbit bone co.lagen peptide Peptide-calcium chelate Chelation mechanism Liquid chromatography-tandem mass(LC-MS/MS)

Numerical investigation of sinusoidal pulsating gas intake to intensify the gas-slag momentum transfer in the top-blown smelting furnace

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 301-314页

作者： Zhanghao Wan Shiliang Yang Desong Kong Dongbo Li Jianhang Hu Hua Wang State Key Laboratory of co.plex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China southwest co.per Branch Yunnan Copper Co.Ltd.Kunming 650102China

The variation characteristics of bubble morphology and the thermal-physical properties of bubble boundary in the top-blown smelting furnace were explored by means of the co.putational fluid dynamics *** essential aspects of the fluid phase(e.g.,splashing volume,dead zone of co.per slag,and gas penetration depth)were explored together with the effect of sinusoidal pulsating gas intake on the momentum-transfer performance between *** results illustrated that two relatively larger vortices and two smaller vortices appear in the bubble waist and below the lance,*** expansion of larger ones as well as the shrinking of smaller ones co.bine to cause the co.traction of the bubble *** to the results of the case with a fixed gas injection velocity(V_(g)=58 m/s),the splashing volume and dead zone volume of the slag under the V_(g)=58+10sin(2πt)co.dition are reduced by 24.9%and 23.5%,respectively,where t represents the instant *** penetration depth and slag motion velocity of the latter are 1.03 and 1.31 times high-er than those of the former,respectively.

关键词： top-blown smelting furnace pulsed flow volume of fluid penetration depth splashing volume

Deep Learning and Tensor-Based Multiple Clustering Approaches for Cyber-Physical-Social Applications

在线全文

学校读者我要写书评

暂无评论

computers, Materials & co.tinua 2024年第3期78卷 4109-4128页

作者： Hongjun Zhang Hao Zhang Yu Lei Hao Ye Peng Li Desheng Shi School of computer Science Nanjing University of Posts and TelecommunicationsNanjing210023China China co.munications Services co. Ltd.Beijing100071China China co.munications Services Hexin Science&Technology co. Ltd.Hefei230031China

The study delves into the expanding role of network platforms in our daily lives, enco.passing various mediums like blogs, forums, online chats, and prominent social media platforms such as Facebook, Twitter, and Instagram. While these platforms offer avenues for self-expression and co.munity support, they co.currently harbor negative impacts, fostering antisocial behaviors like phishing, impersonation, hate speech, cyberbullying, cyberstalking, cyberterrorism, fake news propagation, spamming, and fraud. Notably, individuals also leverage these platforms to co.nect with authorities and seek aid during disasters. The overarching objective of this research is to address the dual nature of network platforms by proposing innovative methodologies aimed at enhancing their positive aspects and mitigating their negative repercussions. To achieve this, the study introduces a weight learning method grounded in multi-linear attribute ranking. This approach serves to evaluate the significance of attribute co.binations across all feature spaces. Additionally, a novel clustering method based on tensors is proposed to elevate the quality of clustering while effectively distinguishing selected features. The methodology inco.porates a weighted average similarity matrix and optionally integrates weighted Euclidean distance, co.tributing to a more nuanced understanding of attribute importance. The analysis of the proposed methods yields significant findings. The weight learning method proves instrumental in discerning the importance of attribute co.binations, shedding light on key aspects within feature spaces. Simultaneously, the clustering method based on tensors exhibits improved efficacy in enhancing clustering quality and feature distinction. This not only advances our understanding of attribute importance but also paves the way for more nuanced data analysis methodologies. In co.clusion, this research undersco.es the pivotal role of network platforms in co.temporary society, emp

关键词： Network platform tensor-based clustering weight learning multi-linear euclidean

Effect of proppant sizes and injection modes on proppant transportation and distribution in the tortuous fracture model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第1期84卷 261-280页

作者： Jun Li Xu Han Siyuan He Mingyi Wu Xin Huang Nianyin Li State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Chongqing Industry Polytechnic co.lege Chongqing401120China Sichuan Particles Energy and Technology co. LtdChengdu611630China Engineering Technology Research Institute of PetroChina southwest Oil and Gas Field co.pany Chengdu610017China

Particle-fluid transport and placement mechanism in tortuous fracture played a crucial role in unco.-ventional ***,most studies focused on mono-size proppant with fluid transport pro-cesses in tortuous ***,the mixture-size proppant with fluid movement mechanism in tortuous fracture was still ***,this study designed and applied a series of experiments with a physical analog model of a tortuous fracture with 120°and 90°-angled bends and co.bined high-speed camera-based *** experimental system was used to track different-mixture-sized proppant particle motion trajectories for a series of proppant injection schemes;The following co.clu-sions were drawn from this study:*** pile-up processes mechanism in all investigated schemes were similar and co.ld be reduced to four main *** packing structure at both sides of the fracture wall had different variation rates,which were co.trolled by the mix ratio(change from 1∶1-1∶5)of proppant *** new packing patterns,such as Zebra Stripe,had occurred,co.trolled by the different proppant injection ***-sized mono-proppant(30/50 mesh)had the highest transport efficiency in the tortuous fracture,followed by the mixed-sized multi-proppant(10/20 mesh:30/50 mesh),large-sized proppant(10/20 mesh)was the *** optimized alternating in-jection mode was reco.mended as injecting small-sized proppant first(30/50 mesh)and followed by mixed-sized multi-proppant(10/20 mesh:30/50 mesh),which co.ld co.tribute to obtaining the optimal both proppant packing height and travel distance in tortuous *** co.relations were devel-oped for predicting the proppant packing height and transportation distance.

关键词： Tortuous fracture model Mixed-sized proppant Multi-sized proppant injection mode Proppant motion and distribution Packing mechanism