Base de dados : MEDLINE
Pesquisa : G01.750.897 [Categoria DeCS]
Referências encontradas : 2814 [refinar]
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  1 / 2814 MEDLINE  
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[PMID]:29352282
[Au] Autor:Liu J; Wu Z; Dong J; Wu J; Wen D
[Ad] Endereço:School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China.
[Ti] Título:An energy-efficient failure detector for vehicular cloud computing.
[So] Source:PLoS One;13(1):e0191577, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Failure detectors are one of the fundamental components for maintaining the high availability of vehicular cloud computing. In vehicular cloud computing, lots of RSUs are deployed along the road to improve the connectivity. Many of them are equipped with solar battery due to the unavailability or excess expense of wired electrical power. So it is important to reduce the battery consumption of RSU. However, the existing failure detection algorithms are not designed to save battery consumption RSU. To solve this problem, a new energy-efficient failure detector 2E-FD has been proposed specifically for vehicular cloud computing. 2E-FD does not only provide acceptable failure detection service, but also saves the battery consumption of RSU. Through the comparative experiments, the results show that our failure detector has better performance in terms of speed, accuracy and battery consumption.
[Mh] Termos MeSH primário: Computação em Nuvem
Fontes de Energia Elétrica/estatística & dados numéricos
Veículos Automotores/estatística & dados numéricos
[Mh] Termos MeSH secundário: Algoritmos
Redes de Comunicação de Computadores
Falha de Equipamento/estatística & dados numéricos
Seres Humanos
Internet
Energia Solar/estatística & dados numéricos
Integração de Sistemas
[Pt] Tipo de publicação:COMPARATIVE STUDY; EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180121
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191577


  2 / 2814 MEDLINE  
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[PMID]:29351554
[Au] Autor:Sabry AH; W Hasan WZ; Ab Kadir MZA; Radzi MAM; Shafie S
[Ad] Endereço:Department of Control and Automation, Faculty of Engineering, UPM, Serdang, Malaysia.
[Ti] Título:Field data-based mathematical modeling by Bode equations and vector fitting algorithm for renewable energy applications.
[So] Source:PLoS One;13(1):e0191478, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The power system always has several variations in its profile due to random load changes or environmental effects such as device switching effects when generating further transients. Thus, an accurate mathematical model is important because most system parameters vary with time. Curve modeling of power generation is a significant tool for evaluating system performance, monitoring and forecasting. Several numerical techniques compete to fit the curves of empirical data such as wind, solar, and demand power rates. This paper proposes a new modified methodology presented as a parametric technique to determine the system's modeling equations based on the Bode plot equations and the vector fitting (VF) algorithm by fitting the experimental data points. The modification is derived from the familiar VF algorithm as a robust numerical method. This development increases the application range of the VF algorithm for modeling not only in the frequency domain but also for all power curves. Four case studies are addressed and compared with several common methods. From the minimal RMSE, the results show clear improvements in data fitting over other methods. The most powerful features of this method is the ability to model irregular or randomly shaped data and to be applied to any algorithms that estimating models using frequency-domain data to provide state-space or transfer function for the model.
[Mh] Termos MeSH primário: Algoritmos
Modelos Teóricos
Energia Renovável/estatística & dados numéricos
[Mh] Termos MeSH secundário: Análise dos Mínimos Quadrados
Conceitos Matemáticos
Energia Solar/estatística & dados numéricos
Vento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180120
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191478


  3 / 2814 MEDLINE  
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[PMID]:28741880
[Au] Autor:Salado M; Fernández MA; Holgado JP; Kazim S; Nazeeruddin MK; Dyson PJ; Ahmad S
[Ad] Endereço:Abengoa Research, Abengoa, C/Energía Solar no. 1, Campus Palmas Altas-, 41014, Sevilla, Spain.
[Ti] Título:Towards Extending Solar Cell Lifetimes: Addition of a Fluorous Cation to Triple Cation-Based Perovskite Films.
[So] Source:ChemSusChem;10(19):3846-3853, 2017 10 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Organohalide perovskites have emerged as highly promising replacements for thin-film solar cells. However, their poor stability under ambient conditions remains problematic, hindering commercial exploitation. The addition of a fluorous-functionalized imidazolium cation during the preparation of a highly stable cesium-based mixed perovskite material Cs (MA FA ) Pb(I Br ) (MA=methylammonium; FA=formamidinium) has been shown to influence its stability. The resulting materials, which vary according to the amount of the fluorous-functionalized imidazolium cation present during fabrication, display a prolonged tolerance to atmospheric humidity (>100 days) along with power conversion efficiencies exceeding 16 %. This work provides a general route that can be implemented in a variety of perovskites and highlights a promising way to increase perovskite solar cell stability.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Fontes de Energia Elétrica
Flúor/química
Óxidos/química
Energia Solar
Titânio/química
[Mh] Termos MeSH secundário: Modelos Moleculares
Conformação Molecular
Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Oxides); 059QF0KO0R (Water); 12194-71-7 (perovskite); 284SYP0193 (Fluorine); D1JT611TNE (Titanium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180118
[Lr] Data última revisão:
180118
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201700797


  4 / 2814 MEDLINE  
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[PMID]:29031439
[Au] Autor:Lian Z; Pan D; Wang W; Zhang D; Li G; Li H
[Ad] Endereço:Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China. Electronic address: zichao.lian.52c@st.kyoto-u.ac.jp.
[Ti] Título:Photoelectrocatalytic reduction of CO to methanol over a photosystem II-enhanced Cu foam/Si-nanowire system.
[So] Source:J Environ Sci (China);60:108-113, 2017 Oct.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A solar-light double illumination photoelectrocatalytic cell (SLDIPEC) was fabricated for autonomous CO reduction and O evolution with the aid of photosystem II (PS-II, an efficient light-driven water-oxidized enzyme from nature) and utilized in a photoanode solution. The proposed SLPEC system was composed of Cu foam as the photoanode and p-Si nanowires (Si-NW) as the photocathode. Under solar irradiation, it exhibited a super-photoelectrocatalytic performance for CO conversion to methanol, with a high evolution rate (41.94mmol/hr), owing to fast electron transfer from PS-II to Cu foam. Electrons were subsequently trapped by Si-NW through an external circuit via bias voltage (0.5V), and a suitable conduction band potential of Si (-0.6eV) allowed CO to be easily reduced to CH OH at the photocathode. The constructed Z-scheme between Cu foam and Si-NW can allow the SLDIPEC system to reduce CO (8.03mmol/hr) in the absence of bias voltage. This approach makes full use of the energy band mismatch of the photoanode and photocathode to design a highly efficient device for solving environmental issues and producing clean energy.
[Mh] Termos MeSH primário: Dióxido de Carbono/química
Cobre/química
Metanol/química
Nanofios/química
Processos Fotoquímicos
Silício/química
[Mh] Termos MeSH secundário: Oxirredução
Complexo de Proteína do Fotossistema II
Energia Solar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Photosystem II Protein Complex); 142M471B3J (Carbon Dioxide); 789U1901C5 (Copper); Y4S76JWI15 (Methanol); Z4152N8IUI (Silicon)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171019
[Lr] Data última revisão:
171019
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171017
[St] Status:MEDLINE


  5 / 2814 MEDLINE  
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[PMID]:28949441
[Au] Autor:Bolink HJ; Mhaisalkar SG
[Ad] Endereço:Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán, 2, 46980, Paterna, Spain.
[Ti] Título:Preface to Special Issue of ChemSusChem on Perovskite Optoelectronics.
[So] Source:ChemSusChem;10(19):3684-3686, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:This Editorial introduces one of two companion Special Issues on "Halide Perovskites for Optoelectronics Applications" in ChemSusChem and Energy Technology following the ICMAT 2017 Conference in Singapore. More information on the other Special Issue can be found in the Editorial published in Energy Technology.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Fontes de Energia Elétrica
Fenômenos Ópticos
Óxidos/química
Publicações Periódicas como Assunto
Energia Solar
Titânio/química
[Pt] Tipo de publicação:EDITORIAL
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Oxides); 12194-71-7 (perovskite); D1JT611TNE (Titanium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170927
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701756


  6 / 2814 MEDLINE  
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[PMID]:28898271
[Au] Autor:Xiao W; Nazario G; Wu H; Zhang H; Cheng F
[Ad] Endereço:Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang, China.
[Ti] Título:A neural network based computational model to predict the output power of different types of photovoltaic cells.
[So] Source:PLoS One;12(9):e0184561, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this article, we introduced an artificial neural network (ANN) based computational model to predict the output power of three types of photovoltaic cells, mono-crystalline (mono-), multi-crystalline (multi-), and amorphous (amor-) crystalline. The prediction results are very close to the experimental data, and were also influenced by numbers of hidden neurons. The order of the solar generation power output influenced by the external conditions from smallest to biggest is: multi-, mono-, and amor- crystalline silicon cells. In addition, the dependences of power prediction on the number of hidden neurons were studied. For multi- and amorphous crystalline cell, three or four hidden layer units resulted in the high correlation coefficient and low MSEs. For mono-crystalline cell, the best results were achieved at the hidden layer unit of 8.
[Mh] Termos MeSH primário: Redes Neurais (Computação)
Centrais Elétricas
Energia Solar
[Mh] Termos MeSH secundário: Cristalização
Silício/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
Z4152N8IUI (Silicon)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170913
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184561


  7 / 2814 MEDLINE  
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[PMID]:28886067
[Au] Autor:Jiang M; Lv M; Deng Z; Zhai G
[Ad] Endereço:Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Muye District, Xinxiang City Henan province, China.
[Ti] Título:A wireless soil moisture sensor powered by solar energy.
[So] Source:PLoS One;12(9):e0184125, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In a variety of agricultural activities, such as irrigation scheduling and nutrient management, soil water content is regarded as an essential parameter. Either power supply or long-distance cable is hardly available within field scale. For the necessity of monitoring soil water dynamics at field scale, this study presents a wireless soil moisture sensor based on the impedance transform of the frequency domain. The sensor system is powered by solar energy, and the data can be instantly transmitted by wireless communication. The sensor electrodes are embedded into the bottom of a supporting rod so that the sensor can measure soil water contents at different depths. An optimal design with time executing sequence is considered to reduce the energy consumption. The experimental results showed that the sensor is a promising tool for monitoring moisture in large-scale farmland using solar power and wireless communication.
[Mh] Termos MeSH primário: Tecnologia de Sensoriamento Remoto
Solo/química
Energia Solar
Tecnologia sem Fio
[Mh] Termos MeSH secundário: Agricultura
Algoritmos
Modelos Teóricos
Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 059QF0KO0R (Water)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170909
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184125


  8 / 2814 MEDLINE  
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[PMID]:28881441
[Au] Autor:Wang Q; Chueh CC; Zhao T; Cheng J; Eslamian M; Choy WCH; Jen AK
[Ad] Endereço:Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98105, USA.
[Ti] Título:Effects of Self-Assembled Monolayer Modification of Nickel Oxide Nanoparticles Layer on the Performance and Application of Inverted Perovskite Solar Cells.
[So] Source:ChemSusChem;10(19):3794-3803, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Entirely low-temperature solution-processed (≤100 °C) planar p-i-n perovskite solar cells (PSCs) offer great potential for commercialization of roll-to-roll fabricated photovoltaic devices. However, the stable inorganic hole-transporting layer (HTL) in PSCs is usually processed at high temperature (200-500 °C), which is far beyond the tolerant temperature (≤150 °C) of roll-to-roll fabrication. In this context, inorganic NiO nanoparticles (NPs) are an excellent candidate to serve as the HTL in PSCs, owing to their excellent solution processability at room temperature. However, the low-temperature processing condition is usually accompanied with defect formation, which deteriorates the film quality and device efficiency to a large extent. To suppress this setback, we used a series of benzoic acid selfassembled monolayers (SAMs) to passivate the surface defects of the NiO NPs and found that 4-bromobenzoic acid could effectively play the role of the surface passivation. This SAM layer reduces the trap-assisted recombination, minimizes the energy offset between the NiO NPs and perovskite, and changes the HTL surface wettability, thus enhancing the perovskite crystallization, resulting in more stable PSCs with enhanced power conversion efficiency (PCE) of 18.4 %, exceeding the control device PCE (15.5 %). Also, we incorporated the above-mentioned SAMs into flexible PSCs (F-PSCs) and achieved one of the highest PCE of 16.2 % on a polyethylene terephthalate (PET) substrate with a remarkable power-per-weight of 26.9 W g . This facile interfacial engineering method offers great potential for the large-scale manufacturing and commercialization of PSCs.
[Mh] Termos MeSH primário: Compostos de Cálcio/química
Fontes de Energia Elétrica
Nanopartículas/química
Níquel/química
Óxidos/química
Energia Solar
Titânio/química
[Mh] Termos MeSH secundário: Modelos Moleculares
Conformação Molecular
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Oxides); 12194-71-7 (perovskite); 7OV03QG267 (Nickel); C3574QBZ3Y (nickel monoxide); D1JT611TNE (Titanium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170908
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701262


  9 / 2814 MEDLINE  
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[PMID]:28875552
[Au] Autor:Lee UH; Azmi R; Sinaga S; Hwang S; Eom SH; Kim TW; Yoon SC; Jang SY; Jung IH
[Ad] Endereço:Division of Advanced Materials, Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea.
[Ti] Título:Diphenyl-2-pyridylamine-Substituted Porphyrins as Hole-Transporting Materials for Perovskite Solar Cells.
[So] Source:ChemSusChem;10(19):3780-3787, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The susceptibility of porphyrin derivatives to light-harvesting and charge-transport operations have enabled these materials to be employed in solar cell applications. The potential of porphyrin derivatives as hole-transporting materials (HTMs) for perovskite solar cells (PSCs) has recently been demonstrated, but knowledge of the relationships between the porphyrin structure and device performance remains insufficient. In this work, a series of novel zinc porphyrin (PZn) derivatives has been developed and employed as HTMs for low-temperature processed PSCs. Key to the design strategy is the incorporation of an electron-deficient pyridine moiety to down-shift the HOMO levels of porphyrin HTMs. The porphyrin HTMs incorporating diphenyl-2-pyridylamine (DPPA) have HOMO levels that are in good agreement with the perovskite active layers, thus facilitating hole transfers from the perovskite to the HTMs. The DPPA-containing zinc porphyrin-based PSCs gave the best performance, with efficiency levels comparable to those of PSCs using spiro-OMeTAD, a current state-of-the-art HTM. In particular, PZn-DPPA-based PSCs show superior air stability, in both doped and undoped forms, to spiro-OMeTAD based devices.
[Mh] Termos MeSH primário: Compostos de Bifenilo/química
Compostos de Cálcio/química
Fontes de Energia Elétrica
Óxidos/química
Porfirinas/química
Energia Solar
Titânio/química
[Mh] Termos MeSH secundário: Eletroquímica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biphenyl Compounds); 0 (Calcium Compounds); 0 (Oxides); 0 (Porphyrins); 12194-71-7 (perovskite); 2L9GJK6MGN (diphenyl); D1JT611TNE (Titanium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170907
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701526


  10 / 2814 MEDLINE  
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[PMID]:28868786
[Au] Autor:Shukla S; Shukla S; Haur LJ; Dintakurti SSH; Han G; Priyadarshi A; Baikie T; Mhaisalkar SG; Mathews N
[Ad] Endereço:Energy Research Institute @ NTU (ERIAN), Nanyang Technological University, Singapore, Research Techno Plaza, 50 Nanyang Drive, 637553, Singapore.
[Ti] Título:Effect of Formamidinium/Cesium Substitution and PbI on the Long-Term Stability of Triple-Cation Perovskites.
[So] Source:ChemSusChem;10(19):3804-3809, 2017 Oct 09.
[Is] ISSN:1864-564X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Altering cation and anion ratios in perovskites has proven an excellent means of tuning the perovskite properties and enhancing the performance. Recently, methylammonium/formamidinium/cesium triple-cation mixed-halide perovskites have demonstrated efficiencies up to 22 %. Similar to the widely explored methylammonium lead halide, excess PbI is added to these perovskite films to enhance their performances. The excess PbI is known to be beneficial for the performance. However, its impact on stability is less well known. Triple-cation perovskites deploy excess PbI up to 8 %. Thus, it is imperative to analyze the role of excess PbI in the degradation kinetics. In this study, the amount of PbI in the triple-cation perovskite films is varied and the degradation kinetics monitored by X-ray diffraction and optical absorption spectroscopy. The inclusion of excess PbI is shown to adversely affect the stability of the material. Faster degradation kinetics are observed for samples with higher PbI contents. However, samples with excess PbI also showed superior properties such as enhanced grain sizes and better optical absorption. Thus, careful management of the PbI quantity is required to obtain better stability and alternative pathways should be explored to achieve better device performance rather than adding excess PbI .
[Mh] Termos MeSH primário: Amidinas/química
Compostos de Cálcio/química
Césio/química
Fontes de Energia Elétrica
Iodetos/química
Chumbo/química
Óxidos/química
Energia Solar
Titânio/química
[Mh] Termos MeSH secundário: Flúor/química
Compostos de Estanho/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amidines); 0 (Calcium Compounds); 0 (Iodides); 0 (Oxides); 0 (Tin Compounds); 12194-71-7 (perovskite); 1KSV9V4Y4I (Cesium); 284SYP0193 (Fluorine); 2P299V784P (Lead); 463-52-5 (formamidine); D1JT611TNE (Titanium); KM7N50LOS6 (stannic oxide)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170905
[St] Status:MEDLINE
[do] DOI:10.1002/cssc.201701203



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