检索结果-南通市图书馆

Paraelectric Doping simultaneously Improves the Field Frequency Adaptability and Dielectric Properties of Ferroelectric Materials: A Phase-Field study

引用

Computers, Materials and Continua 2024年第1期81卷 213-228页

作者： Wang z. Cao j. Liu z. z.ao Y. school of Materials science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy Materials North University of China Taiyuan 030051 China Beij.ng Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing 100083 China Institute of Materials Intelligent Technology Liaoning Academy of Materials Shenyang 110004 China

Recent years, the polariz.tion response of ferroelectrics has been entirely studied. However, it is found that the polariz.tion may disappear gradually with the continually applied of electric field. In this paper, taking K0.48Na0.52NbO3(KNN) as an example, it was demonstrated that the residual polariz.tion began to decrease when the electric field frequency increased to a certain extent using a phase-field methods. The results showed that the content of out-of-plane domains increased first and then decreased with the increase of applied electric field frequency, the maximum polariz.tion disappeared at high frequencies, and the hysteresis loop became elliptical. In order to further study the abnormal changes of hysteresis loops of ferroelectrics under high electric field frequency, we analyz.d the hysteresis loop and dielectric response of solid solution 0.1srTiO3-0.9K0.48Na0.52NbO3. It was found that the doped hysteresis loop maintained its shape at higher frequency and the dielectric constant increased. This kind of doping has a higher field frequency adaptability, which has a key guiding role in improving the dielectric properties of ferroelectric thin films and expanding the frequency application range of ferroelectric nano memory. © 2024 The Authors. Published by Tech science Press.

关键词： dielectric properties doping electric field frequency Ferroelectric ceramics phase field method

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

A DiscreteMulti-Obj.ctive squirrel search Algorithm for Energy-Efficient Distributed Heterogeneous Permutation Flowshop with Variable Processing speed

引用

Computers, Materials and Continua 2024年第1期81卷 1757-1787页

作者： z.ng L. Ding z. shi j. Wang s. school of Electrical and Electronic Engineering Hubei University of Technology Wuhan 430068 China Hubei Key Laboratory for High-Efficiency Utiliz.tion of solar Energy and Operation Control of Energy storage system Hubei University of Technology Wuhan 430068 China Xiangyang Industrial Institute of Hubei University of Technology Xiangyang 441100 China

In the manufacturing industry, reasonable scheduling can greatly improve production efficiency, while excessive resource consumption highlights the growing significance of energy conservation in production. This paper studies the problem of energy-efficient distributed heterogeneous permutation flowshop problem with variable processing speed (DHPFsP-VPs), considering both theminimum makespan and total energy consumption (TEC) as obj.ctives. A discrete multi-obj.ctive squirrel search algorithm (DMssA) is proposed to solve the DHPFsPVPs. DMssA makes four improvements based on the squirrel search algorithm. Firstly, in terms of the population initializ.tion strategy, four hybrid initializ.tion methods targeting different obj.ctives are proposed to enhance the quality of initial solutions. secondly, enhancements are made to the population hierarchy system and position updating methods of the squirrel search algorithm, making it more suitable for discrete scheduling problems. Additionally, regarding the search strategy, six local searches are designed based on problem characteristics to enhance search capability. Moreover, a dynamic predator strategy based on Q-learning is devised to effectively balanceDMssA's capability for global exploration and local exploitation. Finally, two speed control energy-efficient strategies are designed to reduce TEC. Extensive comparative experiments are conducted in this paper to validate the effectiveness of the proposed strategies. The results of comparing DMssA with other algorithms demonstrate its superior performance and its potential for efficient solving of the DHPFsP-VPs problem. © 2024 The Authors. Published by Tech science Press.

关键词： Distributed heterogeneous permutation flowshop problem energy-efficient squirrel search algorithm muli-obj.ctive optimiz.tion variable processing speed

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

Graph Attention Residual Network Based Routing and Fault-Tolerant schedulingMechanism for Data Flow in Power Communication Network

引用

Computers, Materials and Continua 2024年第1期81卷 1641-1665页

作者： Lin z. z.ng z. Yu Y. Ren Y. Qiu X. Chen j. state Key Laboratory ofNetworking and switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China state Grid j.angsu Electric Power Co. Ltd Nanjing 210008 China

For permanent faults (PF) in the power communication network (PCN), such as link interruptions, the timesensitive networking (TsN) relied on by PCN, typically employs spatial redundancy fault-tolerance methods to keep service stability and reliability, which often limits TsN scheduling performance in fault-free ideal states. so this paper proposes a graph attention residual network-based routing and fault-tolerant scheduling mechanism (GRFs) for data flow in PCN, which specifically includes a communication system architecture for integrated terminals based on a cyclic queuing and forwarding (CQF) model and fault recovery method, which reduces the impact of faults by simplified scheduling configurations of CQF and fault-tolerance of prioritiz.ng the rerouting of faulty time-sensitive (Ts) flows; considering that PF leading to changes in network topology is more appropriately solved by doing routing and time slot inj.ction decisions hop-by-hop, and that reasonable network load can reduce the damage caused by PF and reserve resources for the rerouting of faulty Ts flows, an optimiz.tion model for j.int routing and scheduling is constructed with scheduling success rate as the obj.ctive, and with traffic latency and network load as constraints; to catch changes in TsN topology and traffic load, a D3QN algorithm based on a multi-head graph attention residual network (MGAR) is designed to solve the problem model, where the MGAR based encoder reconstructs theTsNstatus into feature embedding vectors, and a dueling network decoder performs decoding tasks on the reconstructed feature embedding vectors. simulation results show that GRFs outperforms heuristic fault-tolerance algorithms and other benchmark schemes by approximately 10%in routing and scheduling success rate in ideal states and 5% in rerouting and rescheduling success rate in fault states. © 2024 The Authors. Published by Tech science Press.

关键词： deep reinforcement learning fault tolerance graph attention network Time-sensitive network

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

DeepsurNet-NsGA II: Deep surrogate Model-Assisted Multi-Obj.ctive Evolutionary Algorithm for Enhancing Leg Linkage in Walking Robots

引用

Computers, Materials and Continua 2024年第1期81卷 229-249页

作者： Ibrayev s. Omarov B. Ibrayeva A. Momynkulov z. j.ldasbekov Institute of Mechanics and Engineering Almaty 050000 Kazakhstan Department of Mathematical and Computer Modeling International Information Technology University Almaty 050000 Kazakhstan Department of Information systems Al-Farabi Kazakh National University Almaty 050000 Kazakhstan

This research paper presents a comprehensive investigation into the effectiveness of the DeepsurNet-NsGA II (Deep surrogate Model-Assisted Non-dominated sorting Genetic Algorithm II) for solving complex multi-obj.ctive optimiz.tion problems, with a particular focus on robotic leg-linkage design. The study introduces an innovative approach that integrates deep learning-based surrogate models with the robust Non-dominated sorting Genetic Algorithm II, aiming to enhance the efficiency and precision of the optimiz.tion process. Through a series of empirical experiments and algorithmic analyses, the paper demonstrates a high degree of correlation between solutions generated by the DeepsurNet-NsGA II and those obtained from direct experimental methods, underscoring the algorithm’s capability to accurately approximate the Pareto-optimal frontier while significantly reducing computational demands. The methodology encompasses a detailed exploration of the algorithm’s configuration, the experimental setup, and the criteria for performance evaluation, ensuring the reproducibility of results and facilitating future advancements in the field. The findings of this study not only confirm the practical applicability and theoretical soundness of the DeepsurNet-NsGA II in navigating the intricacies of multi-obj.ctive optimiz.tion but also highlight its potential as a transformative tool in engineering and design optimiz.tion. By bridging the gap between complex optimiz.tion challenges and achievable solutions, this research contributes valuable insights into the optimiz.tion domain, offering a promising direction for future inquiries and technological innovations. © 2024 The Authors. Published by Tech science Press.

关键词： deep learning genetic algorithm Multi-obj.ctive optimiz.tion surrogate model walking robots

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

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/Cds heteroj.nction with photothermal effect for efficient photocatalytic hydrogen production

引用

j.urnal of Materials science & Technology 2024年第4期171卷 1-9页

作者： T.Y.Huang z.Yang s.Y.Yang z.H.Dai Y.j.Liu j.H.Liao G.Y.z.ong z.j.Xie Y.P.Fang s.s.z.ang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China school of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China school of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utiliz.tion of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/Cds heteroj.nction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)Cds nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of Cds *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

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

Robust Deep Image Watermarking: A survey

引用

Computers, Materials and Continua 2024年第1期81卷 133-160页

作者： Luo Y. Tan X. Cai z. College of Computer National University of Defense Technology Changsha 410005 China

In the era of internet proliferation, safeguarding digital media copyright and integrity, especially for images, is imperative. Digital watermarking stands out as a pivotal solution for image security. With the advent of deep learning, watermarking has seen significant advancements. Our review focuses on the innovative deep watermarking approaches that employ neural networks to identify robust embedding spaces, resilient to various attacks. These methods, characteriz.d by a streamlined encoder-decoder architecture, have shown enhanced performance through the incorporation of novel training modules. This article offers an in-depth analysis of deep watermarking’s core technologies, current status, and prospective traj.ctories, evaluating recent scholarly contributions across diverse frameworks. It concludes with an overview of the technical hurdles and prospects, providing essential insights for ongoing and future research endeavors in digital image watermarking. © 2024 The Authors. Published by Tech science Press.

关键词： data protection deep neural network Deep image watermarking multimedia security

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

Four Late-type Galaxies with Double Radio Lobes and Properties of such Galaxies

引用

Research in Astronomy and Astrophysics 2024年第4期24卷 84-90页

作者： z.s.Yuan X.Y.Gao z.L.Wen j.L.Han National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China CAs Key Laboratory of FAsT National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China school of Astronomy and space sciences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanism for radio lobes from late-type galaxies is not fully *** samples are desired for a thorough investigation and *** utiliz.ng the optical data from the newly released Dark Energy spectroscopic Instrument imaging surveys and the radio sources from the NRAO VLA sky survey and the Faint Images of the Radio sky at Twenty-centimeter,we identify four Late-type Galaxies with double Radio Lobes(La GRLs):j.217-3645,j.947+6220,j.412+3723 and j.736+*** previously known La GRLs,we confirm the correlation between radio power P_(1.4GHz.and stellar mass M_(*)of host ***(25/35)La GRLs belong to the blue cloud galaxies,while the newly identified cases in this work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offset from the P_(1.4GHz.-M_(*)relation,and the galaxy color,indicating that bluer galaxies at a fixed M_(*)tend to host more powerful radio ***,the maj.rity(31/36)of La GRLs are either located in a galaxy group or displaying a disturbed *** suggest that all of the galaxy mass,color and surrounding environment could play important roles in triggering radio lobes in late-type galaxies.

关键词： galaxies:active galaxies:j.ts galaxies:spiral radio continuum:galaxies

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

High-secured Image LsB steganography Using AVL-Tree with Random RGB Channel substitution

引用

Computers, Materials and Continua 2024年第1期81卷 183-211页

作者： Nj.um M. sulaiman R. shukur z. Qamar F. Center of Cyber security Faculty of Information Science and Technology Universiti Kebangsaan Malaysia Selangor Bangi 43600 Malaysia Computer science and Cyber security Faculty of Engineering and Information Technology BirZeit University Ramallah P.O. Box 14 BirZeit Palestine

Random pixel selection is one of the image steganography methods that has achieved significant success in enhancing the robustness of hidden data. This property makes it difficult for steganalysts’ powerful data extraction tools to detect the hidden data and ensures high-quality stego image generation. However, using a seed key to generate non-repeated sequential numbers takes a long time because it requires specific mathematical equations. In addition, these numbers may cluster in certain ranges. The hidden data in these clustered pixels will reduce the image quality, which steganalysis tools can detect. Therefore, this paper proposes a data structure that safeguards the steganographic model data and maintains the quality of the stego image. This paper employs the Adelson-Velsky and Landis (AVL) tree data structure algorithm to implement the randomiz.tion pixel selection technique for data concealment. The AVL tree algorithm provides several advantages for image steganography. Firstly, it ensures balanced tree structures, which leads to efficient data retrieval and insertion operations. secondly, the self-balancing nature of AVL trees minimiz.s clustering by maintaining an even distribution of pixels, thereby preserving the stego image quality. The data structure employs the pixel indicator technique for Red, Green, and Blue (RGB) channel extraction. The green channel serves as the foundation for building a balanced binary tree. First, the sender identifies the colored cover image and secret data. The sender will use the two least significant bits (2-LsB) of RGB channels to conceal the data’s siz. and associated information. The next step is to create a balanced binary tree based on the green channel. Utiliz.ng the channel pixel indicator on the LsB of the green channel, we can conceal bits in the 2-LsB of the red or blue channel. The first four levels of the data structure tree will mask the data siz., while subsequent levels will conceal the remaining digits of s

关键词： AVL tree capacity Image steganography imperceptibility peak signal-to-noise ratio (PsNR) pixel random selection (PRs)

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

Compressive property and energy absorption characteristic of interconnected porous Mg-z.-Y alloys with adj.sting Y addition

引用

j.urnal of Magnesium and Alloys 2024年第1期12卷 171-185页

作者： j.A.Liu s.j.Liu B.Wang W.B.sun X.j.Liu z.W.Han College of Materials science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for Bionics-j.lin University Weihai 264205PR China

In this study,interconnected porous Mg-2z.-xY alloys with different phase compositions were prepared by various Y additions(x=0.4,3,and 6 wt.%)to adj.st the compressive properties and energy absorption *** characteriz.tion methods were then applied to identify the microstructure of the porous Mg-z.-Y and describe the details of the second *** tests were performed at room temperature(RT),200℃,and 300℃to study the impact of the Y addition and testing temperature on the compressive properties of the porous *** experimental results showed that a high Y content promotes a microstructure refinement and increases the volume fraction of the second *** the Y content increases,different Mg-z.-Y ternary phases appear:I-phase(Mg_(3)z._(6)Y),W-phase(Mg_(3)z._(3)Y_(2)),and LPsO phase(Mg_(12)z.Y).When the Y content ranges between 0.4%and 6%,the compressive strength increases from 6.30MPa to 9.23 MPa,and the energy absorption capacity increases from 7.33 Mj.m^(3)to 10.97 Mj.m^(3)at RT,which is mainly attributed to the phase composition and volume fraction of the second ***,the average energy absorption efficiency is independent of the Y *** addition,the compressive deformation behaviors of the porous Mg-z.-Y are altered by the testing *** compressive strength and energy absorption capacity of the porous Mg-z.-Y decrease due to the softening effect of the high temperature on the *** deformation behaviors at different temperatures are finally observed to reflect the failure mechanisms of the struts.

关键词： Porous magnesium Rare earth elements Microstructure Compressive behavior Energy absorption characteristic

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

Research onManeuver Decision-Making ofMulti-Agent Adversarial Game in a Random Interference Environment

引用

Computers, Materials and Continua 2024年第1期81卷 1879-1903页

作者： Hu s. Ru L. Lu B. Wang z. z.ao X. Wang W. Xi H. Equipment Management and UAV Engineering College Air Force Engineering University Xi'an 710051 China National Key Laboratory of Unmanned Aerial Vehicle Technology Xi'an 710051 China College of Information Technology Nanjing Police University Nanjing 210023 China

The strategy evolution process of game players is highly uncertain due to random emergent situations and other external disturbances. This paper investigates the issue of strategy interaction and behavioral decision-making among game players in simulated confrontation scenarios within a random interference environment. It considers the possible risks that random disturbances may pose to the autonomous decision-making of game players, as well as the impact of participants' manipulative behaviors on the state changes of the players. A nonlinear mathematical model is established to describe the strategy decision-making process of the participants in this scenario. subsequently, the strategy selection interaction relationship, strategy evolution stability, and dynamic decision-making process of the game players are investigated and verified by simulation experiments. The results show that maneuver-related parameters and random environmental interference factors have different effects on the selection and evolutionary speed of the agent's strategies. Especially in a highly uncertain environment, even small information asymmetry or miscalculation may have a significant impact on decision-making. This also confirms the feasibility and effectiveness of the method proposed in the paper, which can better explain the behavioral decision-making process of the agent in the interaction process. This study provides feasibility analysis ideas and theoretical references for improving multi-agent interactive decision-making and the interpretability of the game system model. © 2024 The Authors. Published by Tech science Press.

关键词： Behavior decision-making maneuver multi-agent nonlinear mathematical modeling stochastic evolutionary game

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

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：