检索结果-南通市图书馆

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

Computers, Materials & Continua 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 Communications Services Co. Ltd.Beijing100071China China Communications Services Hexin Science&Technology Co. Ltd.Hefei230031China

The study delves into the expanding role of network platforms in our daily lives, encompassing 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 community support, they concurrently 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 connect 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 combinations 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 incorporates a weighted average similarity matrix and optionally integrates weighted Euclidean distance, contributing 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 combinations, 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 conclusion, this research underscores the pivotal role of network platforms in contemporary society, emp

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

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research on TensorMulti-Clustering Distributed Incremental Updating Method for Big Data

引用

Computers, Materials and Continua 2024年第1期81卷 1409-1432页

作者： Zhang, Hongjun Zhang, Zeyu Ruan, Yilong Ye, Hao Li, Peng shi, desheng School of Computer Science Nanjing University of Posts and Telecommunications Nanjing 210023 China Ministry of Science and Technology Innovation China Communications Services Corporation Limited Beijing 100071 China School of Artificial Intelligence The University of Manchester Manchester M13 9PL United Kingdom Ministry of Technology Innovation China Telecom Artificial Intelligence Technology (Beijing) Corporation Limited Beijing 100032 China Ministry of Science and Technology Innovation Zhongbo Information Technology Research Institute Corporation Limited Nanjing 210012 China Jiangsu Postal Big Data Technology and Application Engineering Research Center Nanjing University of Posts and Telecommunications Nanjing 210003 China

The scale and complexity of big data are growing continuously, posing severe challenges to traditional data processing methods, especially in the field of clustering analysis. To address this issue, this paper introduces a new method named Big Data Tensor Multi-Cluster Distributed Incremental Update (BDTMCDIncreUpdate), which combines distributed computing, storage technology, and incremental update techniques to provide an efficient and effective means for clustering analysis. Firstly, the original dataset is divided into multiple subblocks, and distributed computing resources are utilized to process the sub-blocks in parallel, enhancing efficiency. Then, initial clustering is performed on each sub-block using tensor-based multi-clustering techniques to obtain preliminary *** new data arrives, incremental update technology is employed to update the core tensor and factor matrix, ensuring that the clustering model can adapt to changes in data. Finally, by combining the updated core tensor and factor matrix with historical computational results, refined clustering results are obtained, achieving real-time adaptation to dynamic data. Through experimental simulation on the Aminer dataset, the BDTMCDIncreUpdate method has demonstrated outstanding performance in terms of accuracy (ACC) and normalized mutual information (NMI) metrics, achieving an accuracy rate of 90% and an NMI score of 0.85, which outperforms existing methods such as TClusInitUpdate and TKLClusUpdate in most scenarios. Therefore, the BDTMCDIncreUpdate method offers an innovative solution to the field of big data analysis, integrating distributed computing, incremental updates, and tensor-based multi-clustering techniques. It not only improves the efficiency and scalability in processing large-scale high-dimensional datasets but also has been validated for its effectiveness and accuracy through experiments. This method shows great potential in real-world applications where dynamic data growth is

关键词： Data accuracy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高压开关柜用介电功能梯度绝缘隔板电场调控特性分析

引用

绝缘材料 2024年第9期57卷 97-105页

作者：沈海波卞秋野孙永健史德生郭振伟国网山东省电力公司利津县供电公司山东东营257400 国网山东省电力公司东营供电公司山东东营257000

针对高压开关柜中绝缘隔板电场分布不均匀、局部电场畸变严重容易导致绝缘故障的问题,将介电功能梯度材料引入到绝缘隔板的制备中,提出了内部绝缘结构优化和表面绝缘结构优化两种优化方案。通过改变材料的介电常数上限、绝缘隔板厚度以... 详细信息

针对高压开关柜中绝缘隔板电场分布不均匀、局部电场畸变严重容易导致绝缘故障的问题,将介电功能梯度材料引入到绝缘隔板的制备中,提出了内部绝缘结构优化和表面绝缘结构优化两种优化方案。通过改变材料的介电常数上限、绝缘隔板厚度以及表面涂层厚度等参数进行电场、温度场仿真计算,对比分析其对电场分布优化效果的影响,最后对两种优化方案进行了仿真及介质损耗特性试验对比。结果表明:相较于传统的匀质绝缘隔板,在不考虑开关柜内部运行环境因素影响的条件下,改变内部绝缘结构和增加表面涂层都可以使沿面最大场强降低。当绝缘隔板厚度增加到12 mm时电场优化效果最优,沿面最大场强可降低69.8%;当表面涂层厚度为1 mm时电场优化效果最优,沿面最大场强可降低62.9%。通过仿真及试验对比证明,内部绝缘结构优化的隔板电场调控效果及绝缘性能更优。

关键词：高压开关柜介电功能梯度绝缘隔板电场调控介质损耗

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

In situ establishment of Co/MoS_(2) heterostructures onto inverse opal‐structured N,S‐doped carbon hollow nanospheres:Interfacial and architectural dual engineering for efficient hydrogen evolution reaction

引用

SmartMat 2021年第4期2卷 591-602页

作者： Tingyu Lu Tongfei Li desheng shi Jialin Sun Huan Pang Lin Xu Jun Yang Yawen Tang Jiangsu Key Laboratory of New Power Batteries School of Chemistry and Materials ScienceNanjing Normal UniversityNanjingJiangsuChina 2 School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhouJiangsuChina Nanjing IPE Institute of Green Manufacturing Industry NanjingJiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina

Rational design of low‐cost and high‐efficiency non‐precious metal‐based catalysts toward the hydrogen evolution reaction(HER)is of paramount significance for the sustainable development of the hydrogen *** manipulationinduced electronic modulation represents a sophisticated strategy to enhance the intrinsic activity of a non‐precious ***,we demonstrate the straightforward construction of Co/MoS_(2) hetero‐nanoparticles anchored on inverse opal‐structured N,S‐doped carbon hollow nanospheres with an ordered macroporous framework(denoted as Co/MoS_(2)@N,S-CHNSs hereafter)via a templateassisted *** experimental evidence and theoretical calculations reveal that the formation of Co/MoS_(2) heterojunctions can effectively modulate the electronic configuration of active sites and optimize the reaction pathways,remarkably boosting the intrinsic ***,the inverse opal‐structured carbon substrate with an ordered porous framework is favorable to enlarge the accessible surface area and provide multidimensional mass transport channels,dramatically expediting the reaction *** to the compositional synergy and structural superiority,the fabricated Co/MoS_(2)@N,S-CHNSs exhibit excellent HER activity with a low overpotential of 105mV to afford a current density of 10 mA/cm^(2).The rationale of interface manipulation and architectural design herein is anticipated to be inspirable for the future development of efficient and earth‐abundant electrocatalysts for a variety of energy conversion systems.

关键词： heterostructures hydrogen evolution reaction inversed opal structure MoS_(2)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

人性与社会自然的二重性及深刻意蕴——涂尔干社会学思想的核心问题之一

引用

南京社会科学 2012年第4期 83-89页

作者：石德生南京大学商学院

涂尔干是西方现代社会学学科的创始人之一,对于社会学学科的核心问题———人与社会的自然及其关联———展开了深入思考与分析,并以笛卡尔的"心物二元论"、康德与卢梭的启蒙与理性思想为基础,建立了具有类型学与方法论意义的人性与社... 详细信息

涂尔干是西方现代社会学学科的创始人之一,对于社会学学科的核心问题———人与社会的自然及其关联———展开了深入思考与分析,并以笛卡尔的"心物二元论"、康德与卢梭的启蒙与理性思想为基础,建立了具有类型学与方法论意义的人性与社会自然的"心物二重性"思想,奠定了社会学学科体系中个人与社会的二元研究视角与路径。

关键词：人性自然社会自然二重性意蕴

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of Hinterland Manufacturing on the Development of Container Ports: Evidence from the Pearl River Delta, China

引用

Chinese Geographical Science 2024年第5期34卷 886-898页

作者： HONG Haolin WANG Bo XUE desheng School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510006China

Container ports and hinterland manufacturing are two important forces of the local participation in economic *** study,taking the Pearl River Delta(PRD),China with an export-oriented economy as an example,applies Huff and panel regres-sion models to evaluate the impact of hinterland manufacturing on the development of container ports during the period of 1993–*** results show that 1)the spatial patterns of hinterlands for hub ports help to determine the distribution range and scale of economic variables that affect port throughput;2)the hinterland’s gross manufacturing output has universally positive influence on port through-put,wherein export-oriented processing and the entire manufacturing industry have significantly positive impact on port throughput in 1993–2011 and 2001–2019,respectively;3)the two internal structural factors related to an export-oriented economy,labor-intensive sectors and foreign-funded terminals,have positively moderate the direct influence of hinterland manufacturing on port *** results highlight the importance of local context in understanding port-manufacturing relationship in developing *** on our findings,policy implications are further proposed to enhance port network organization in PRD.

关键词： container ports hinterland manufacturing local development context Huff model panel regression model Pearl River Delta(PRD),China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

多维视野中的“社会资本”与“关系”

引用

青海社会科学 2010年第2期 56-61页

作者：石德生南京大学社会学系中共青海省委党校

"关系"概念是社会心理学本土化过程中构建的具有"中国本土"特色的微观社会研究模型与方法。近年来随着当代西方社会学理论的渐次传入,有些学者常以"社会资本"概念来替代"关系"概念来分析研究当代中国微观社会的人际关系与文化现象,或在... 详细信息

"关系"概念是社会心理学本土化过程中构建的具有"中国本土"特色的微观社会研究模型与方法。近年来随着当代西方社会学理论的渐次传入,有些学者常以"社会资本"概念来替代"关系"概念来分析研究当代中国微观社会的人际关系与文化现象,或在研究中混同使用这两个概念。本文经过多个学科视角分析后认为:虽然这两个概念之内涵有些许重叠之处,但鉴于其各自不同所指、外延与文化背景,所以在研究中不能相互替代、混用。

关键词：社会资本关系研究

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation,optical properties and energy transfer of SrLaAlO4:Dy3+,Eu3+

引用

Journal of Rare Earths 2024年第11期42卷 2058-2067页

作者： Wei Chen Heng Zhang desheng Zhu School of Physic and Optoelectronic Engineering Yangtze University

A series of Dy3+/Eu3+single doped and co-doped SrLaAlO4phosphors was synthesized by the traditional high-temperature solid-state method,and their structure,morphology and optical properties were *** X-ray diffraction（XRD） shows a small amount of doping with Dy3+and Eu3+does not change the crystal structure of the matrix SrLaAlO4and the best synthesis temperature is 1450℃.The scanning electron microscopy（SEM） indicates the particle size directly ranges from 1 to 5μm roughly and the energy dispersive spectroscopy（EDS） patterns show that SrLaAlO4:Dy3+phosphor and SrLaAlO4:Dy3+,Eu3+phosphor were successfully ***4:Dy3+phosphor can be effectively excited by near-ultraviolet light,producing two strong emission lights at 483 nm（blue light） and 579 nm（yellow light）,presenting a cold white light;SrLaAlO4:Eu3+phosphor can be effectively excited by nearultraviolet light,producing red lights at 622 nm;the characteristic emission peaks of Dy3+and Eu3+can be shown simultaneously under the same excitation wavelength in SrLaAlO4:Dy3+, Eu3+*** changing the relative doping concentration ratio of Dy3+and Eu3+,the modulation of SrLaAlO4:Dy3+,Eu3+phosphor from cold white to warm white light can be *** addition,the study of the luminescent mechanism and lifetime shows that there is energy transfer between Dy3+and Eu3+in SrLaAlO4:Dy3+,Eu3+phosphor.

关键词： Energy transfer High-temperature solid-phase method Luminescence properties Rare earths SrLaAlO4: Dy3+, Eu3+ White phosphor

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Effect mechanism of seepage force on the hydraulic fracture propagation

引用

International Journal of Coal Science & Technology 2024年第3期11卷 223-240页

作者： Haiyang Wang desheng Zhou Yi Zou Peng Zheng School of Petroleum Engineering Xi’an Shiyou UniversityXi’an710065China Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil and Gas Reservoirs in West China Ministry of EducationXi’an Shiyou UniversityXi’an710065ShaanxiChina Xi’an University of Science and Technology Xi’an710054ShaanxiChina

The flow of fluid through the porous matrix of a reservoir rock applies a seepage force to the solid rock *** the seepage force exerted by fluid flow through the porous matrix of a reservoir rock has a notable influence on rock deformation and failure,its effect on hydraulic fracture(HF)propagation remains ***,in this study,we improved a traditional fluid–solid coupling method by incorporating the role of seepage force during the fracturing fluid seepage,using the discrete element ***,we validated the simulation results of the improved method by comparing them with an analytical solution of the seepage force and published experimental ***,we conducted numerical simulations in both homogeneous and heterogeneous sandstone formations to investigate the influence of seepage force on HF *** results indicate that fluid viscosity has a greater impact on the magnitude and extent of seepage force compared to injection rate,and that lower viscosity and injection rate correspond to shorter hydraulic fracture ***,seepage force influences the direction of HF propagation,causing HFs to deflect towards the side of the reservoir with weaker cementation and higher permeability.

关键词： Hydraulic fracturing Seepage force Fracture propagation Discrete element method Reservoir heterogeneity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The types and characteristics of man-induced sediment disaster

引用

Journal of Geographical Sciences 2002年第4期12卷 495-504页

作者： JIN desheng, shi Changxing, CHEN Hao, ZHANG Ouyang(Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China) Inst. of Geographic Sciences and Natural Resources Research CAS 北京 100101

The man-induced sediment disaster includes material erosion, transportation and accumulation by human activities. It possesses special attribute in sociology and disaster science. In accordance with human activities, geomorphologic location, behavior and particular, the man-induced sediment disaster can be divided into 4 types: the drainage network, slope and gully, channel and plain-estuary-coastline. Each type includes erosion, transportation, accumulation, complexity and cascading. Based on human activity, geomorphology, sediment mechanics and catastrophology, the man-induced sediment disaster is characterized as follows: (1) accelerating tendency with geographical zoning back-ground; (2) non-order characters by blind action without special technical training; (3) gradually and sharply changing with human environment vibration; and (4) complexity and non-linear figure, etc. One of the reasons leading to man-induced sediment disaster is human environment vibration.

关键词： man’s dynamics sediment disaster type character

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：