检索结果-南通市图书馆

Thermoelectric generator based on anisotropic wood aerogel for low-grade heat energy harvesting

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第25期120卷 150-158页

作者： Xuan Zhao Zehong Chen Hao Zhuo Yijie Hu Ge Shi Bing Wang Haihong Lai Sherif Araby Wenjia Han Xinwen Peng Linxin Zhong State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou 510641China Department of Mechanical and Aerospace Engineering Nazarbayev University53 Kabanbay Batyr AvenueNur-SultanKazakhstan State Key Laboratory of Bio-based Material and Green Papermaking Qilu University of TechnologyJinan 250353China

Thermoelectric generators(TEGs)have received increasing attention due to their potential to harvest low-grade heat energy(<100℃ )and provide power for the Internet of Things(IoT)and wearable electronic ***,a wood-bas... 详细信息

Thermoelectric generators(TEGs)have received increasing attention due to their potential to harvest low-grade heat energy(energy filtering effect to enhance thermoelectric(TE)output *** vertical TEG assembled by the CNT/PEDOT wood aerogels reveals an output power of 1.5μW and a mass-specific power of 15.48μW g^(−1)at a temperature difference of 39.4 ***,the layered structure renders high compressibility and fatigue *** anisotropic structure,high mechanical performance,and rapid thermoelectric response,enabling the TEG based on CNT/PEDOT wood aerogel offer opportunities for continuous power supply to low-power electronic devices.

关键词： Wood Nano cellulose energy harvesting Wearable devices Thermoelectric generator

Efficient thermal management and all-season energy harvesting using adaptive radiative cooling and a thermoelectric power generator

在线全文

学校读者我要写书评

暂无评论

能源化学:英文版 2023年第9期84卷 496-501页

作者： Chanil Park Woohwa Lee Choyeon Park Sungmin Park Jaeho Lee Yong Seok Kim Youngjae Yoo Advanced Materials Division Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Republic of Korea Department of Mechanical and Aerospace Engineering University of CaliforniaIrvineCA 92617United States Department of Advanced Materials Engineering Chung-Ang UniversityAnseong 17546Republic of Korea

Passive daytime radiative cooling(PDRC) is useful for thermal management because it allows an object to emit terrestrial heat into space without the use of additional *** produce sub-ambient temperatures under direct sunlight,PDRC materials are designed to reduce their absorption of solar energy and to enhance their long-wavelength infrared(LWIR) *** recent years,many photonic structures and polymer composites have been studied to improve the cooling system of ***,in cold weather(i.e. during winter in cold climates),buildings need to be kept warm rather than cooled due to heat *** overcome this limitation,temperature-responsive radiative cooling is a promising *** the present study,adaptive radiative cooling(ARC) film fabricated from a polydimethylsiloxane/hollow SiO_(2) microsphere/thermochromic pigment composite was *** found that the ARC film absorbed solar radiation under cold conditions while exhibiting radiative cooling at ambient temperatures above 40℃.Thus,in outdoor experiments,the ARC film achieved sub-ambient temperatures and had a theoretical cooling power of 63.2 W/m~2 in hot *** also demonstrated that radiative cooling with an energy harvesting system could be used to improve the energy management of buildings,with the thermoelectric module continuously generating output power using the ARC ***,we believe that our proposed ARC film can be employed for efficient thermal management of buildings and all-season energy harvesting in the near future.

关键词： Thermal management Daytime radiative cooling Temperature-adaptive film Thermoelectric device energy harvesting

Approximation Designs for energy harvesting Relay Deployment in Wireless Sensor Networks

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2022年第4期37卷 779-796页

作者：王怿刘忆雪朱舜佳高晓沨田臣 School of Modern Posts Nanjing University of Posts and TelecommunicationsNanjing 210003China State Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China ByteDance Inc. Shanghai 201100China Key Laboratory of Artificial Intelligence of Ministry of Education Department of Computer Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

energy harvesting technologies allow wireless devices to be recharged by the surrounding environment, providing wireless sensor networks (WSNs) with higher performance and longer lifetime. However, directly building a wireless sensor network with energy harvesting nodes is very costly. A compromise is upgrading existing networks with energy harvesting technologies. In this paper, we focus on prolonging the lifetime of WSNs with the help of energy harvesting relays (EHRs). EHRs are responsible for forwarding data for sensor nodes, allowing them to become terminals and thus extending their lifetime. We aim to deploy a minimum number of relays covering the whole network. As EHRs have several special properties such as the energy harvesting and depletion rate, it brings great research challenges to seek an optimal deployment strategy. To this end, we propose an approximation algorithm named Effective Relay Deployment Algorithm, which can be divided into two phases: disk covering and connector insertion using the partitioning technique and the Steinerization technique, respectively. Based on probabilistic analysis, we further optimize the performance ratio of our algorithm to (5 + 6/K) where K is an integer denoting the side length of a cell after partitioning. Our extensive simulation results show that our algorithm can reduce the number of EHRs to be deployed by up to 45% compared with previous work and thus validate the efficiency and effectiveness of our solution.

关键词： approximation algorithm constraint relay deployment energy harvesting wireless sensor network

Integrated device for multiscale series vibration reduction and energy harvesting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2023年第12期44卷 2227-2242页

作者： Jihou YANG Weixing ZHANG Xiaodong YANG Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

A multi-degree-of-freedom device is proposed,which can achieve efficient vibration reduction as the main objective and energy harvesting as the secondary *** device comprises a multiscale nonlinear vibration absorber(NVA)and piezoelectric *** conversion and energy measurement methods are used to evaluate the device performance from multiple *** has shown that this device can efficiently transfer transient energy from the main structure and convert a portion of transient energy into electrical *** resonance and higher-order resonance are the main reasons for efficient energy *** device can maintain high vibration reduction performance even when the excitation amplitude changes over a large *** with the single structures with and without precompression,the multiscale NVA-piezoelectric device offers significant vibration reduction *** addition,there are significant differences in the parameter settings of the two substructures for vibration reduction and energy harvesting.

关键词： integrated device nonlinear vibration reduction energy harvesting transient vibration energy principle

Full-Duplex Cooperative Relaying with Non-Linear energy harvesting for Vehicular Communication

在线全文

学校读者我要写书评

暂无评论

Journal of Communications and Information Networks 2023年第4期8卷 369-377页

作者： Vaijayanti Panse Tapan Kumar Jain Indian Institute of Information Technology Nagpur441108India

This paper analyses the performance of fullduplex(FD)dual-hop vehicular cooperative network with decode-and-forward(DF)*** FD relay nodes,we examine the effects of non-linear hybrid power time splitting(PTS)based energy harvesting(EH).All three nodes—source(S),relay(R),and destination(D)are assumed to be moving *** expressions for the system's outage probability(OP)over double(cascaded)Rayleigh fading channels are *** also analyse the impact of residual self-interference(RSI)caused at FD relay on system's *** compare the performance of system with two relay selection techniques,namely,maximum channel gain-based(Max-G)relay selection and minimum RSI-based(Min-SI)relay *** paper considers the joint effect of time splitting ratio and self-interference cancellation(SIC)level to find the optimum EH ***,the effect of time splitting ratio and average signal-to-noise ratio(SNR)on outage and throughput performance of the system are also investigated in this *** derived expressions are validated through Monte Carlo simulations.

关键词： Cooperative communication vehicular networks energy harvesting full-duplex outage probability

Metaheuristic Secure Clustering Scheme for energy harvesting Wireless Sensor Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第4期45卷 497-512页

作者： S.Nithya Roopa P.Anandababu Sibi Amaran Rajesh Verma Department of Computer Science and Engineering Kumaraguru College of TechnologyCoimbatore641049India Department of Computer and Information Science Faculty of ScienceAnnamalai UniversityChidambaram608002India Department of Computing Technologies SRM Institute of Science and TechnologyChennai603203India Department of Electrical Engineering King Khalid UniversityAbha61411Kingdom of Saudi Arabia

Recently,energy harvesting wireless sensor networks(EHWSN)have increased significant attention among research *** harvesting energy from the neighboring environment,the sensors in EHWSN resolve the energy constraint problem and offers lengthened network *** is one of the proficient ways for accomplishing even improved lifetime in *** clustering process intends to appropriately elect the cluster heads(CHs)and construct *** several models are available in the literature,it is still needed to accomplish energy efficiency and security in *** this view,this study develops a novel Chaotic Rider Optimization Based Clustering Protocol for Secure energy harvesting Wireless Sensor Networks(CROC-SEHWSN)*** presented CROC-SEHWSN model aims to accomplish energy efficiency by clustering the node in *** CROC-SEHWSN model is based on the integration of chaotic concepts with traditional rider optimization(RO)***,the CROC-SEHWSN model derives a fitness function(FF)involving seven distinct parameters connected to *** accomplish security,trust factor and link quality metrics are considered in the *** design of RO algorithm for secure clustering process shows the novelty of the *** order to demonstrate the enhanced performance of the CROC-SEHWSN approach,a wide range of simulations are carried out and the outcomes are inspected in distinct *** experimental outcome demonstrated the superior performance of the CROC-SEHWSN technique on the recent approaches with maximum network lifetime of 387.40 and 393.30 s under two scenarios.

关键词： Clustering wireless sensor networks network lifetime energy efficiency metaheuristics energy harvesting rider optimization

Advanced DC-DC converter topologies for solar energy harvesting applications:a review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean energy 2023年第3期7卷 555-570页

作者： Tole Sutikno Ahmad Saudi Samosir Rizky Ajie Aprilianto Hendril Satrian Purnama Watra Arsadiando Sanjeevikumar Padmanaban Department of Electrical Engineering Universitas Ahmad DahlanYogyakartaIndonesia Department of Electrical Engineering Universitas LampungBandar LampungIndonesia Embedded Systems and Power Electronics Research Group YogyakartaIndonesia Department of Business Development and Technology Aarhus UniversityHerningDenmark

In this study,the advanced topologies of a DC-DC converter for applications involving the harvesting of solar energy are *** work’s primary contribution is a guide for choosing the most effective topology for a DC-DC converter when developing solar energy collection *** topologies of a DC-DC converter for solar energy harvesting applications are compared in terms of the range of power levels they can oversee,the complexity of the underlying hardware,the cost of implementation,the tracking efficiency and the overall efficiency of the *** article explains five innovative approaches for adapting boost converters to function as standard DC-DC converters to capture solar energy,consisting of(i)voltage-multiplier cell,(2)coupled inductor,(3)coupled inductor and switch capacitor,(4)cascaded topology and(5)voltage-lift *** of the boost converter’s restrictions,it is necessary to deliver high *** comparison findings demonstrate that the voltage-lift-based boost-converter topology performs more effectively than the *** conclusion,the information presented in this paper can be utilized when developing solar energy collection systems to determine the sort of direct current to direct current converter that will be most effective.

关键词： boost converter DC-DC converter energy harvesting renewable energy solar photovoltaic

Performance Analysis of Multi-Channel CR Enabled IoT Network with Better energy harvesting

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 & Continua 2022年第4期71卷 183-197页

作者： Afiya Kiran Ahmad Karim Yasser Obaid Alharbi Diaa Mohammed Uliyan Department of Computer Science BZ UniversityMultan6000Pakistan Department of Information Technology BZ UniversityMultanPakistan College of Computer Science and Engineering University of Ha’ilHailSaudi Arabia

Wireless Sensor Networks(WSNs)can be termed as an autoconfigured and infrastructure-less wireless networks to monitor physical or environmental conditions,such as temperature,sound,vibration,pressure and motion *** may comprise thousands of Internet of Things(IoT)devices to sense and collect data from its surrounding,process the data and take an automated and mechanized *** the other side the proliferation of these devices will soon cause radio spectrum ***,to facilitate these networks,we integrate Cognitive Radio(CR)functionality in these *** can sense the unutilized spectrum of licensed users and then use these empty bands when *** order to keep the IoT nodes functional all time,continuous energy is *** this reason the energy harvested techniques are preferred in IoT *** it is preferred to harvest Radio Frequency(RF)energy in the *** this paper a region based multi-channel architecture is *** which the coverage area of primary node is divided as energy harvesting Region and Communication *** Secondary User(SU)that are the licensed user is IoT enabled with Cognitive Radio(CR)techniques so we call it CR-enabled IoT node/device and is encouraged to harvest energy by utilizing radio frequency *** harvest energy efficiently and to reduce the energy consumption during sensing,the concept of overlapping region is given that supports to sense multiple channels simultaneously and help the SU to find best channel for transmitting data or to harvest energy from the ideal *** the experimental analysis,it is proved that SU can harvest more energy in overlapping region and this architecture proves to consume less energy during data transmission as compared to single *** also show that channel load can be highly reduced and channel utilization is proved to be more ***,this proves the proposed architecture cost-effective and energy-efficient.

关键词： Wireless sensor network multi-channel sensing energy harvesting cognitive radio IoT network

Collaborative D2D Communication in Relay Networks with energy harvesting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2022年第9期19卷 162-170页

作者： Qiang Li Pinyi Ren School of Information and Communication Engineering Xi’an Jiaotong UniversityXi’an 710049China Shaanxi Smart Networks and Ubiquitous Access Research Center Xi’an 710049China

Although the collaborative transmission of cellular network and device-to-device(D2D)pairs can improve spectrum utilization,it also results in the matual interference,which may be fatal for low-energy D2D *** on this,we propose in this paper a collaborative D2D transmission scheme with erergy harvesting(CDTEH)in a relay network,where D2D pairs are allowed to access the spectrum of relay network to accomplish their own *** particular,the relay with energy harvesting is arranged to not only expand cellular transmission range but also assist D2D and cellular users to eliminate the mutual *** evaluate the performance,rate-energy(R-E)region is *** on the model,a data rate maximization problem of D2D pair is formulated,subject to a transmission demand of the cellular user and the optimal solution is ***,numerical results are provided to validate the proposed scheme improves the data rate of D2D pair ensuring the cellular transmission requirement.

关键词： energy harvesting transmission rate R-E region collaborative D2D communication