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Solar Radiation Estimation Based on a New Combined Approach of Artificial Neural Networks (ANN) and Genetic Algorithms (GA) in South Algeria

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Computers, materials & Continua 2024年第6期79卷 4725-4740页

作者： Djeldjli Halima Benatiallah Djelloul Ghasri Mehdi Tanougast Camel Benatiallah Ali Benabdelkrim Bouchra Material Sciences Department Faculty of Material SciencesMathematics and Computer ScienceLaboratory of Sustainable Development and Computer Science(LSDCS)University of AdrarAdrar01000Algeria Department of Civil Engineering University of Sistan and BaluchestanZahedan98167-45845Iran Laboratory of Computer Production and Maintenance Engineering(LGIPM)University of LorraineChieulles57070France Laboratory of Energy Environment and Information System(LEEIS) University of AdrarAdrar01000Algeria

When designing solar systems and assessing the effectiveness of their many uses,estimating sun irradiance is a crucial first *** study examined three approaches(ANN,GA-ANN,and ANFIS)for estimating daily global solar radiation(GSR)in the south of Algeria:Adrar,Ouargla,and *** proposed hybrid GA-ANN model,based on genetic algorithm-based optimization,was developed to improve the ANN *** GA-ANN and ANFIS models performed better than the standalone ANN-based model,with GA-ANN being better suited for forecasting in all sites,and it performed the best with the best values in the testing phase of Coefficient of Determination(R=0.9005),Mean Absolute Percentage Error(MAPE=8.40%),and Relative Root Mean Square Error(rRMSE=12.56%).Nevertheless,the ANFIS model outperformed the GA-ANN model in forecasting daily GSR,with the best values of indicators when testing the model being R=0.9374,MAPE=7.78%,and rRMSE=10.54%.Generally,we may conclude that the initial ANN stand-alone model performance when forecasting solar radiation has been improved,and the results obtained after injecting the genetic algorithm into the ANN to optimize its weights were *** model can be used to forecast daily GSR in dry climates and other climates and may also be helpful in selecting solar energy system installations and sizes.

关键词： Solar energy systems genetic algorithm neural networks hybrid adaptive neuro fuzzy inference system solar radiation

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Sulfone-functionalized stable molecular single crystals for photocatalytic hydrogen evolution

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SusMat 2024年第3期4卷 240-250页

作者： Xunliang Hu Xiaoju Yang Bingyi Song Zhen Zhan Ruixue Sun Yantong Guo Li-Ming Yang Xuan Yang Chun Zhang Irshad Hussain Xiaoyan Wang Bien Tan Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhanChina Department of Applied Physics The Hong Kong Polytechnic UniversityKowloonHong KongChina College of Life Science&Technology Huazhong University of Science and TechnologyWuhanChina Department of Chemistry and Chemical Engineering SBA School of Science and EngineeringLahore University of Management SciencesLahorePakistan

Highly crystalline organic semiconductors are ideal materials for photocatalytic hydrogen evolution in water ***,the instability and complex synthesis processes of most reported organic molecule-based photocatalysts restrict their *** this study,we introduce benzo[1,2-b:4,5-bʹ]bis[1]benzothiophene-3,9-dicarboxylic acid,5,5,11,11-tetraoxide(FSOCA),a highly crystalline,stable molecular crystal that is easy to synthesize and serves as an efficient photocatalyst for the hydrogen evolution *** exhibits high efficiency in sacrificial hydrogen evolution reaction(760μmol h^(−1),76 mmol g^(−1)h^(−1)at 330 mW cm^(−2);570μmol h^(−1),57 mmol g^(−1)h^(−1)at 250 mW cm^(−2)),and FSOCA remains stable during photocatalysis for up to 400 *** and theoretical studies confirmed the presence of hydrogen bonds between the sulfone group and the sacrificial agent(ascorbic acid).This interaction significantly improved the oxidation reaction kinetics and boosted the photocatalytic *** study presents a scalable and convenient approach to synthesize highly crystalline,active,and stable organic photocatalysts with potential applications in large-scale photocatalysis.

关键词： exceptional durability molecular single crystals photocatalytic water splitting

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Chiral phosphoric acid-catalyzed atroposelective oxidative coupling of carbazoles

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science China Chemistry 2025年

作者： Qian Lu Min-Jie Bi Yong-Bin Wang Li-Min Yang Huan-Huan Liu Shao-Hua Xiang Bin Tan Department of Chemistry Southern University of Science and Technology College of Material Chemistry and Chemical Engineering Hangzhou Normal University

Atropisomeric carbazoles are widely used in organic synthesis, medicine, and material science. Although the enantioselective coupling of two aryl units provides a straightforward means to access biaryl atropisomers, this approach has yet to be explored extensively for carbazole-based structures due to their diverse reactive sites. This report presents a chiral phosphoric acidcatalyzed approach to achieve enantioselective synthesis of carbazole-based atropisomers with exceptional chemo-, site-, and stereoselectivities. The key innovation lies in the organocatalytic activation of the heteroaromatic compound, which represents the first example of converting nucleophilic carbazoles into electrophilic species, thereby enriching the field of carbazole chemistry. Hydrazine-decorated carbazoles undergo oxidative homo-coupling to furnish atropisomeric bicarbazoles, while the inclusion of external indole nucleophiles as coupling partners leads to the formation of indole-carbazole atropisomers. A novel chiral phosphine ligand has been synthesized on the homo-coupled bicarbazole skeleton. The distinctive features of this complex reaction system were enabled by the in situ oxidation of both substrates and products, as well as the judicious choice of indoles as nucleophiles to regulate selective coupling.

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Tunable multicolor luminescence in vanadates from yttrium to indium with enhanced luminous efficiency and stability for its application in WLEDs and indoor photovoltaics

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Nano Research 2023年第8期16卷 11486-11494页

作者： Yaoyang Zhang Jing Mao Peifen Zhu Guofeng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMissouri 65211USA

The preparation of high-efficiency phosphor is the key to the construction of white light-emitting diode(WLED)devices and their application in indoor *** with YVO_(4),InVO_(4)is not suitable as the host material of lanthanide ions because of its strong ***,the work focused on combining the broadband emission from InVO_(4)and the red luminescence from YVO_(4):Eu^(3+)to obtain enhanced and stable multicolor *** band structure,density of state,and optical properties were studied by density functional *** spectral configuration of YVO_(4):In^(3+)/Eu^(3+)with(112)surface appears to be broadening and redshifts with increasing layer *** the In^(3+)concentration is 3.5 mol%,the YVO_(4):30%Eu^(3+)/In^(3+)emits the strongest *** Judd-Ofelt parameterΩ2 of YVO_(4):In^(3+)/Eu^(3+)increases with increaing In^(3+)concentration,indicating that the symmetry *** adjusting In^(3+)/Eu^(3+)contents,the YVO_(4):In^(3+)/Eu^(3+)not only can emit white light with a color rendering index of 95,but also can be used as high-efficiency red phosphor to build WLED devices with blue emitting N/Tb codoped carbon quantum dots(CQDs-N:Tb^(3+))and green emitting MOF:Tb^(3+)(MOF=metal organic framework),for which the color rendering index can also reach 95 and the color temperature is 5549 *** manufactured WLED devices were further used to excite the silicon solar cell and make it show good photoelectric characteristics.

关键词： luminescence enhancement multicolor stability density functional theory(DFT)calculation white light-emitting diodes(WLEDs) indoor photovoltaics

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Ternary layered boride MoAlB:A novel thermo-regulation microwave absorbing ceramic material

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Journal of Advanced Ceramics 2024年第5期13卷 699-710页

作者： Zhangjue Wang Fan Zhang Nannan Wang Wei Li Yongqiang Chen Hailong Wang Rui Zhang Yanqiu Zhu Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Academy of Sciences Zhengzhou 450046China State Key Laboratory of Featured Metal Materials and Life Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Department of Engineering Faculty of EnvironmentScience and EconomyUniversity of ExeterExeter EX44QFUK

In the context of the fifth-generation(5G)smart era,the demand for electromagnetic wave(EMW)-absorbing materials has become increasingly prominent,so it is necessary to explore promising candidate *** work focuses on the exploration of the material absorbing properties of a MoAlB MAB(MAB represents a promising group of alternatives,where M stands for a transition metal,A typically denotes Al,and B is boron)phase ***,the first-principles calculations were performed to reveal the unique crystal and layered structure of the MoAlB ceramics and to predict their potential for use as an EMW absorption ***,a series of MoAlB ceramics were synthesized at temperatures ranging from 800 to 1300℃,and the influence of temperature on the phase compositions and microstructures of the obtained MoAlB ceramics was characterized and ***,the practical EMW absorption performance of the prepared MoAlB ceramics was evaluated via a combination of experiments and radar cross-sectional *** MoAlB sample synthesized at 900℃ exhibits superior EMW absorption performance,achieving an impressive minimum reflection loss(RL)of−50.33 *** unique layered structure and good electrical conductivity of the MoAlB samples are the main reasons for their enhanced wave absorption performance,which provides interfacial polarization and multiple dielectric loss ***,this study not only contributes to the understanding of the preparation of MoAlB materials but also provides potential guidance for their utilization in the realm of electromagnetic wave absorption.

关键词： MoAlB electronic band structure electromagnetic wave(EMW)absorption layered ternary boride density of states

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Compact solar-powered plasma water generator: enhanced germination of aged seed with the corona dielectric barrierdischarger

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Frontiers of Agricultural science and engineering 2024年第4期11卷 642-651页

作者： Yiting XIAO Yang TIAN Haizheng XIONG Ainong SHI Jun ZHU Biological Engineering University of ArkansasFayettevilleAR 72701USA Program of Material Science and Engineering University of ArkansasFayettevilleAR 72701USA Department of Horticulture University of ArkansasFayettevilleAR 72701USA.

Seed aging adversely affects agricultural productivity by reducing germination rates and seedling vigor,leading to significant costs for seed banks and companies due to the need for frequent seed *** study demonstrated the use of plasma-activated water(PAW),generated by a solar-powered corona dielectric barrier discharger,to enhance germination rates of spinach seeds that had been stored at 4℃ for 23 *** seeds with PAW at 17 kV for 15 min improved germination(by 135%)and seedling growth compared to untreated *** detailed analysis,beneficial PAW properties for seed development were identified,and a molecular mechanism for this rejuvenation is *** solar-powered microreactor used in this study is considered to represent a significant advancement in seed treatment technology,offering a sustainable solution to meet growing food demands while addressing environmental and resource sustainability challenges.

关键词： Non-thermal plasma plant growth reactor design seedgermination

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Effect of austenitizing temperature on martensitic transformation in SA508Gr.4N steel

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Journal of materials science & Technology 2024年第19期186卷 244-255页

作者： Shumeng Lu Li Wan Shanju Zheng Mengnie Li Juanna Ren Baosheng Liu Manal F.Abou Taleb Zeinhom M.El-Bahy Zhongdong Xu Xiaojing Wang Mohamed M.Ibrahim Zhanhu Guo Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China Department of Materials Science and Engineering Inner Mongolia Zhongsheng Engineering Technology Co.Ltd.Alashan 750300China Department of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon TyneNE18STUK Department of Chemistry College of Science and Humanities in Al-KharjPrince Sattam Bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

SA508Gr.4 N steel is commonly used in nuclear pressure vessels. The current study discloses the impact of austenitizing temperature on its martensitic transformation. Various austenitizing temperatures were employed to examine the martensitic transformation at different experimental conditions. The characteristics of grain boundaries, microstructure, transformation kinetics, and crystallography of the martensitic phase following the austenitizing process and martensitic transformation were analyzed. Austenitizing temperatures had minimal effects on the critical temperature of the austenitizing phase transition. However, an increase in austenitizing temperature resulted in larger grain sizes. The phase composition primarily consisted of lath martensite, accompanied by a small amount of residual austenite (RA). As the austenitizing temperature increased, the temperature of martensite-start temperature (Ms) initially decreased and then increased. On the other hand, the temperature of martensite-finish (Mf) showed no significant sensitivity to changes in the austenitizing temperature. Moreover, the average size of the lath martensite structure was increased, and there was an increased tendency for variant selection as the austenitizing temperature increased, and the combination of specific orientation relationships appeared. This study is very valuable for revealing the microstructure evolution at different temperatures.

关键词： SA508Gr.4 N steel Austenitizing temperature Martensitic transformation Microstructures characteristics

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Nonequilibrium thermodynamic foundation of the grand-potential phase field model

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Physical Review E 2025年第2期111卷 L022104-L022104页

作者： Jin Zhang James A. Warren Peter W. Voorhees Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA Material Measurement Laboratory National Institute of Standards and Technology 100 Bureau Drive Gaithersburg Maryland 20899 USA

Choosing the correct free energy functional is critical when developing thermodynamically consistent phase field models. We show that the grand-potential phase field model minimizes the Helmholtz free energy when mass conservation is imposed. While both functionals are at a minimum at equilibrium, the Helmholtz free energy decreases monotonically with time in the grand-potential phase field model, whereas the grand potential does not. Minimizing the grand potential implies a different problem where a system can exchange mass with its surroundings at every point, leading to a condition of isochemical potential and invalidating mass conservation of the system.

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N-doped carbon confined ternary Pt_(2)NiCo intermetallics for efficient oxygen reduction reaction

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Chinese Chemical Letters 2025年第3期36卷 432-438页

作者： Chenhao Zhang Qian Zhang Yezhou Hu Hanyu Hu Junhao Yang Chang Yang Ye Zhu Zhengkai Tu Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430074China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong 999077China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China

Developing high performance electrocatalysts for the cathodic oxygen reduction reaction(ORR)is essential for the widespread application of fuel ***,a promising Pt_(2)NiCo atomic ordered ternary intermetallic compound with N-doped carbon layer coating(o-Pt_(2)NiCo@NC)has been synthesized via a facile method and applied in acidic *** confinement effect provided by the carbon layer not only inhibits the agglomeration and sintering of intermetallic nanoparticles during high temperature process but also provides adequate protection for the nanoparticles,mitigating the aggregation,detachment and poisoning of nanoparticles during the electrochemical *** a result,the o-Pt_(2)NiCo@NC demonstrates a mass activity(MA)and specific activity(SA)of 0.65 A/mgPt and 1.41mA/cm_(Pt) ^(2) in 0.1mol/L HClO_(4),*** addition,after 30,000 potential cycles from 0.6 V to 1.0 V,the MA of o-Pt_(2)NiCo@NC shows much lower decrease than the disordered Pt_(2)NiCo alloy and Pt/*** cycling at high potential cycles of 1.5 V for 10,000 cycles,the MA still retains∼70%,demonstrating superior long-term ***,the o-Pt_(2)NiCo@NC also exhibits strong tolerance to CO,SO_(x),and PO_(x) molecules in toxicity tolerance *** strategy in this work provides a novel insight for the development of ORR catalysts with high catalytic activity,durability and toxicity tolerance.

关键词： Oxygen reduction reaction Electrocatalysis Ordered intermetallic Toxicity tolerance Carbon confinement

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Inhibiting liquid permeation into silicone rubber by superhydrophobic coating for prolonged service life

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High Voltage 2023年第5期8卷 986-996页

作者： Shuming Liu Ying Zhou Zhou Zuo Shuqi Liu Qian Wang Zhong Chen Xidong Liang State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijingChina School of Material Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Liquid permeation into silicone rubber(SR)may lead to the degradation or complete failure of the composite *** to inhibit liquid permeation,two kinds of superhydrophobic coatings are applied to the SR *** liquid permeation properties of SR with different types of liquids are investigated,and the Langmuir diffusion model is applied to analyse the experimental *** results show that the composite superhydrophobic coating can effectively inhibit liquid permeation by reducing the contact area between the surface and liquid,and the stable structure of the composite coating can maintain the performance after the liquid permeation and ***,the nano‐particle coating without the polymer binder experiences severe performance degradation during the immersion test,and it cannot restrain the liquid permeation anymore after it loses the *** a validation of the effective protection,the insulation resistivity change was *** resistivity decreases sharply for the pristine SR after water permeation;however,the decrease is much smaller for the coated *** current study not only provides new insight into the liquid permeation properties of SR with different surface wettability but also suggests an effective measure to prevent liquid permeation into SR.

关键词： coating permeation liquid

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