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Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen Lin Mehedi hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Potassium hydroxide

Earthquake behavior of steel cushion-implemented reinforced concrete frames

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Earthquake Engineering and Engineering Vibration 2018年第2期17卷 385-401页

作者： hasan Ozkaynak Beykent University Civil Engineering DepartmentIstanbulTurkey

The earthquake performance of vulnerable structures can be increased by the implementation of supplementary energy-dissipative metallic *** main aim of this paper is to describe the earthquake behavior of steel cushionimplemented reinforced concrete frames（SCI-RCFR）in terms of displacement demands and energy *** quasi-static experiments were performed on steel cushions（SC）installed in reinforced concrete（RC）*** test results served as the basis of the analytical models of SCs and a bare reinforced concrete frame（B-RCFR）.These models were integrated in order to obtain the resulting analytical model of the ***-time history analyses（NTHA）were performed on the SCI-RCFR under the effects of the selected earthquake data *** to the NTHA,SC application is an effective technique for increasing the seismic performance of RC *** main portion of the earthquake input energy was dissipated through *** succeeded in decreasing the plastic energy demand on structural elements by almost 50% at distinct drift levels.

关键词： steel cushion energy dissipation non-linear time history analysis seismic performance

Dynamic response of an alluvial valley consists of three types of soil

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Earthquake Engineering and Engineering Vibration 2020年第2期19卷 289-305页

作者： hasan Faik Kara Civil Engineering Department Trakya UniversityTurkey

Dynamic response of an alluvial valley consisting of three different types of soil was *** the twodimensional model,the alluvial valley was assumed to have half-cylindrical *** alluvial valley contained three different types of soil with different *** valley was surrounded by a *** of the soil types and the half-space were assumed to be isotropic,homogeneous and linear *** half-space was excited by simple harmonic SH-waves radiated from a strike-slip *** fault was assumed to have circular-arc shape in the mathematical *** governing equations were solved by using wave function expansion method where boundary conditions were relatively *** the regions where boundary conditions were more complex,finite difference method was ***,the wave propagation problem was solved *** obtained numerical results showed that surface displacement amplitudes are significantly affected by the material properties of the different soil types of the alluvial *** was also observed that the shapes of the soil types in the alluvial valley played a considerable role in surface displacements.

关键词： cylindrical SH-waves alluvial valley strike-slip fault

Two novel sets of UiO-66@metal oxide/graphene oxide Z-scheme heterojunction:Insight into tetracycline and malathion photodegradation

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Journal of Environmental Sciences 2020年第5期32卷 222-236页

作者： Hanieh Fakhri hasan Bagheri Chemical Injuries Research Center Systems Biology and Poisonings InstituteBaqiyatallah University of Medical SciencesTehranIran

Nowadays,widespread researches have been focused on the development of effective photocatalysts to remove pollutants of the aquatic *** accordance with the universal studies,two new sets of UiO-66@metal oxide(including ZnO and TiO2)/graphene oxide heterojunctions were synthesized for photodegradation of aromatic(tetracycline)and nonaromatic(malathion)pollutants which are challenging cases in the *** dosage of the photocatalyst,pH of the solution,the type of metal oxide,and the presence of various scavengers are assayed parameters in this *** the optimum condition,maximum photodegradation efficiency is achieved in 90 min for tetracycline(81%)and malathion(100%)by the UiO-66@ZnO/graphene *** superior separation of charge carriers by Z-scheme mechanism,excellent electron mobility on layers of graphene oxide and high surface area are factors that enhanced the ***,in comparison with pure UiO-66,the band gaps belong to heterojunctions revealed a red shift in the absorption edge,which can be responsible for more expand adsorption of the solar *** organic carbon analysis verified the decontamination of these pollutants in the *** produced main intermediates during the photocatalytic process were identified and the possible degradation pathway *** general,the superior photocatalytic activity suggests that these designed photocatalysts can be a promising choice for having a clean future.

关键词： Metal-organic framework UiO-66 Photodegradation Malathion Tetracycline Z-scheme mechanism

Experimental and analytical assessment of the hypervelocity impact damage of GLAss fiber REinforced aluminum

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Defence Technology（防务技术） 2022年第7期18卷 1232-1246页

作者： Md.Zahid hasan Bangladesh Air Force Academy Bangladesh Air Force Base Matiur RahmanBAF Academy Road7404 JessoreKhulnaBangladesh

This article addresses the response of GLAss fiber REinforced aluminum to hypervelocity impacts of micrometeoroid analogs at impact velocities of 7 km/s and *** relation,the damage modes of different GLAss fiber REinforced aluminum configurations have been *** GLAss fiber REinforced aluminum configurations comprised six to twelve variably thick aluminum layers and up to four plies of glass fiber reinforced epoxy per composite *** impact experiments have been conducted with the help of a two-stage light-gas gun,wherein aluminum-and stainless steel projectiles were launched at velocities up to 7.15 km/*** inspection of the damage area suggested the dissipation of impact energy in elastic-plastic deformation,petalling,delamination,debonding,tensile failure of fibers,and pyrolysis of epoxy.A prevailing damage mode was not apparent *** quasi-isotropic ply orientation of S2-glass/FM94-epoxy laminates promoted the interference of shockand rarefaction waves and suppressed the damage area of GLAss fiber REinforced *** discriminate between the impact performance of different GLAss fiber REinforced aluminum configurations,the energy dissipated in different damage modes of GLAss fiber REinforced aluminum has been assessed *** terms of normalized energy,the cross-ply GLAss fiber REinforced aluminum dissipated higher energy in petal formation than in other primary damage *** normalized petalling energy was found to decline with the increase of impact *** outcomes of this study will help to optimize the GLAss fiber REinforced aluminum laminate,which will be employed as a bumper shield to prevent the fatal damage and the unzipping of a spacecraft pressure bulkhead.

关键词： Hypervelocity impact Petalling Fiber failure Volumetric compression Sublimation of epoxy

Stochastic Linear Programming for Optimal Planning of Battery Storage Systems Under Unbalanced-uncertain Conditions

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Journal of Modern Power Systems and Clean Energy 2020年第5期8卷 971-980页

作者： Reza Hemmati hasan Mehrjerdi Department of Electrical Engineering Kermanshah University of TechnologyKermanshahIran Qatar University DohaQatar

Battery energy storage system(BESS)has already been studied to deal with uncertain parameters of the electrical systems such as loads and renewable ***,the BESS have not been properly studied under unbalanced operation of power *** paper aims to study the modelling and operation of BESS under unbalanced-uncertain conditions in the power *** proposed model manages the BESS to optimize energy cost,deal with load uncertainties,and settle the unbalanced loading at the same *** three-phase unbalanced-uncertain loads are modelled and the BESSs are utilized to produce separate charging/discharging pattern on each phase to remove the unbalanced *** IEEE 69-bus grid is considered as case *** load uncertainty is developed by Gaussian probability function and the stochastic programming is adopted to tackle the *** model is formulated as mixed-integer linear programming and solved by GAMS/*** results demonstrate that the model is able to deal with the unbalanced-uncertain conditions at the same *** model also minimizes the operation cost and satisfies all security constraints of power grid.

关键词： Battery energy storage system(BESS) singlephase storage planning unbalanced loading uncertainty

A Generalized State Space Average Model for Parallel DC-to-DC Converters

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Computer Systems Science & Engineering 2022年第5期41卷 717-734页

作者： hasan Alrajhi Umm Al-Qura University Makkah21955Saudi Arabia

The high potentiality of integrating renewable energies,such as photovoltaic,into a modern electrical microgrid system,using DC-to-DC converters,raises some issues associated with controller loop design and system *** generalized state space average model(GSSAM)concept was consequently introduced to design a DC-to-DC converter controller in order to evaluate DC-to-DC converter performance and to conduct stability *** paper presents a GSSAM for parallel DC-to-DC converters,namely:buck,boost,and buck-boost *** rationale of this study is that modern electrical systems,such as DC networks,hybrid microgrids,and electric ships,are formed by parallel DC-to-DC converters with separate DC input ***,this paper proposes a GSSAM for any number of parallel DC-to-DC *** proposed GSSAM is validated and investigated in a time-domain simulation environment,namely a MATLAB/*** study compares the steady-state,transient,and oscillatory performance of the state-space average model with a fully detailed switching model.

关键词： Parallel DC-to-DC converters generalized state space average model buck converters boost converters buck-boost converters

The Bar-Bulge Relation in Non-dwarf SB0 Galaxies in the Central Region of Coma Cluster

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Research in Astronomy and Astrophysics 2023年第6期23卷 212-219页

作者： Nagamani Poloji Priya hasan S.N.hasan Department of Astronomy Osmania UniversityHyderabadIndia Department of Physics Maulana Azad National Urdu UniversityHyderabadIndia Department of Mathematics Maulana Azad National Urdu UniversityHyderabadIndia

In this paper we explore the formation of bars and present the bulge and bar properties and their correlations for a sample of lenticular barred(SB0)and lenticular unbarred(S0)galaxies in the central region of the Coma Cluster using HST/ACS *** our sample,we identified bar features using the luminosity profile decomposition software *** classified the bulges based on Sérsic index and Kormendy *** found that the average mass of the bulge in SB0 galaxies is 1.48×10^(10)M☉whereas the average mass of the bulge in S0 galaxies is 4.3×10^(10)M☉.We observe that SB0 galaxies show lower bulge concentration,low mass and also smaller B/T values compared to S0 *** the Kormendy relation,we found that among the lenticular barred galaxies,82%have classical bulges and 18%have pseudo *** classical bulges have low masses compared to the classical bulges of unbarred galaxies.S0,galaxies with massive classical bulges do not host *** also found that for all SB0s the bulge effective radius is less than the bar effective ***0 galaxies with classical bulges suggest that the bar may have formed by mergers.

关键词： galaxies:clusters:individual(Coma) galaxies:bulges galaxies:elliptical and lenticular cD

Using the Hg_xMg_(1-x)Te ternary compound as a room temperature photodetector: The electronic structure, charge transport, and response function of the energetic electromagnetic radiation

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Chinese Physics B 2018年第5期27卷 143-149页

作者： Ghasemi hasan Mokhtari Ali Department of Physics Faculty of SciencesShahrekord University

In the present work, firstly, a first-principles study of the structural, electronic, and electron transport properties of the HgxMg1-xTe（HMT） ternary compound is performed using the ABINIT package and the results are compared with Cd0.9Zn0.1 Te（CZT） as a current room-temperature photodetector. Next, the response functions of Hg0.6Mg0.4Te and Cd0.9Zn0.1Te under electromagnetic irradiation with 0.05 Me V, 0.2 MeV, 0.661 MeV and 1.33 MeV energies are simulated by using the MCNP code. According to these simulations, the Hg0.6Mg0.4Te ternary compound is suggested as a good semiconductor photodetector for use at room temperature.

关键词： band gap charge-carrier transport photodetector density functional theory