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Scalable Ir-Doped NiFeb>2b>Ob>4b>/TiOb>2b> Heterojunction Anode for Decentralized Saline Wastewater Treatment and Hb>2b> Production

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NANO-MICrO LETTErS 2025年第1期17卷 1-18页

作者： Hong, Sukhwa Kim, Jiseon Park, Jaebeom Im, Sunmi Hoffmann, Michael r. Cho, Kangwoo Pohang Univ Sci & Technol POSTECH Div Environm Sci & Engn Pohang 790784 South Korea CALTECH Linde Labs Pasadena CA 91125 USA Yonsei Univ Int Campus Inst Convergence Res & Educ Adv Technol I CREATE Incheon 21983 South Korea

Wastewater electrolysis cells (WECs) for decentralized wastewater treatment/reuse coupled with H-2 production can reduce the carbon footprint associated with transportation of water, waste, and energy carrier. This study reports Ir-doped NiFe2O4 (NFI, similar to 5 at% Ir) spinel layer with TiO2 overlayer (NFI/TiO2), as a scalable heterojunction anode for direct electrolysis of wastewater with circumneutral pH in a single-compartment cell. In dilute (0.1 M) NaCl solutions, the NFI/TiO2 marks superior activity and selectivity for chlorine evolution reaction, outperforming the benchmark IrO2. robust operation in near-neutral pH was confirmed. Electroanalyses including operando X-ray absorption spectroscopy unveiled crucial roles of TiO2 which serves both as the primary site for Cl- chemisorption and a protective layer for NFI as an ohmic contact. Galvanostatic electrolysis of NH4+-laden synthetic wastewater demonstrated that NFI/TiO2 not only achieves quasi-stoichiometric NH4+-to-N-2 conversion, but also enhances H-2 generation efficiency with minimal competing reactions such as reduction of dissolved oxygen and reactive chlorine. The scaled-up WEC with NFI/TiO2 was demonstrated for electrolysis of toilet wastewater.

关键词： Wastewater electrolysis cell Ir-doped NiFe2O4 reactive chlorine species Decentralized H-2 production On-site wastewater treatment

Turbulent flow in converging nozzles,part one:boundary layer solution

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Applied Mathematics and Mechanics(English Edition) 2011年第5期32卷 645-662页

作者： r.MADDAHIAN b.FArHANIEH b.FIrOOZAbADI Center of Excellence in Energy Conversion School of Mechanical Engineering Sharif University of Technology

The boundary layer integral method is used to investigate the development of the turbulent swirling flow at the entrance region of a conical nozzle. The governing equations in the spherical coordinate system are simplified with the boundary layer as- sumptions and integrated through the boundary layer. The resulting sets of differential equations are then solved by the fourth-order Adams predictor-corrector method. The free vortex and uniform velocity profiles are applied for the tangential and axial velocities at the inlet region, respectively. Due to the lack of experimental data for swirling flows in converging nozzles, the developed model is validated against the numerical simulations. The results of numerical simulations demonstrate the capability of the analytical model in predicting boundary layer parameters such as the boundary layer growth, the shear rate, the boundary layer thickness, and the swirl intensity decay rate for different cone angles. The proposed method introduces a simple and robust procedure to investigate the boundary layer parameters inside the converging geometries.

关键词： swirling flow converging nozzle swirl intensity decay rate boundary layer integral method analytical solution

bayes Theorem based Virtual Machine Scheduling for Optimal Energy Consumption

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Computer Systems Science & Engineering 2022年第10期43卷 159-174页

作者： r.Swathy b.Vinayagasundaram Computer Center Madras Institute of TechnologyAnna UniversityChennai600044India

This paper proposes an algorithm for scheduling Virtual Machines(VM)with energy saving strategies in the physical servers of cloud data *** saving strategy along with a solution for productive resource utilizationfor VM deployment in cloud data centers is modeled by a combination of“VirtualMachine Scheduling using bayes Theorem”algorithm(VMSbT)and Virtual Machine Migration(VMMIG)*** is shown that the overall data center’sconsumption of energy is minimized with a combination of VMSbT algorithmand Virtual Machine Migration(VMMIG)*** machine migrationbetween the active physical servers in the data center is carried out at periodicalintervals as and when a physical server is identified to be *** VMscheduling,the optimal data centers are clustered using bayes Theorem and VMsare scheduled to appropriate data center using the selection policy that identifiesthe cluster with lesser energy *** using bayes rule minimizesthe number of server choices for the selection *** of bayestheorem in clustering has enabled the proposed VMSbT algorithm to schedule thevirtual machines on to the physical server with minimal execution *** proposedalgorithm is compared with other energy aware VM allocations algorithmsviz.“Ant-Colony”optimization-based(ACO)allocation scheme and“min-min”scheduling *** experimental simulation results prove that the proposedcombination of‘VMSbT’and‘VMMIG’algorithm outperforms othertwo strategies and is highly effective in scheduling VMs with reduced energy consumptionby utilizing the existing resources productively and by minimizing thenumber of active servers at any given point of time.

关键词： Energy saving strategy VM scheduling VM migration bayes theorem resource utilization

Image Encryption Using Multi-Scroll Attractor and Chaotic Logistic Map

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Computers, Materials & Continua 2022年第8期72卷 3447-3463页

作者： r.Anitha b.Vijayalakshmi Department of Electronics&Communication Engineering B.S.Abdur Rahman Crescent Institute of Science&TechnologyChennai600045TamilnaduIndia

In the current scenario,data transmission over the network is a challenging task as there is a need for protecting sensitive *** encryption schemes are less sensitive and less complex thus prone to attacks during *** has been observed that an encryption scheme using chaotic theory is more promising due to its non-linear and unpredictable ***,proposed a novel hybrid image encryption scheme with multi-scroll attractors and quantum chaos logistic maps(MSA-QCLM).The image data is classified as inter-bits and intra-bits which are permutated separately using multi scroll attractor&quantum logistic maps to generate random *** increase the encryption efficiency,a hybrid chaotic technique was *** is performed in a Qiskit simulation tool for various image *** simulation results and theoretical analysis show that the proposed method is more efficient than its classical counterpart,and its security is verified by the statistical analysis,keys sensitivity,and keyspace *** Number of changing pixel rate(NPCr)&the Unified averaged changed intensity(UACI)values were observed to be 99.6%&33.4%***,entropy oscillates from 7.9 to 7.901 for the different tested encrypted *** proposed algorithm can resist brute force attacks well,owing to the values of information entropy near the theoretical value of *** proposed algorithm has also passed the NIST test(Frequency Monobit test,run test and DFT test).

关键词： Chiper key image encryption logistic map quantum chaos qiskit

OD-Characterization of certain four dimensional linear groups with related results concerning degree patterns

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Frontiers of Mathematics in China 2015年第1期10卷 1-31页

作者： b. AKbArI A.r. MOGHADDAMFAr Department of Mathematics K. N. Toosi University of Technology P. O. Box 16315-1618 Tehran Iran research Institute for Fundamental Sciences Tabriz Iran

The prime graph of a finite group G, which is denoted by GK（G）, is a simple graph whose vertex set is comprised of the prime divisors of ｜G｜ and two distinct prime divisors p and q are joined by an edge if and only if there exists an element of order pq in G. Let P1 〈 P2 〈 … 〈 Pk be all prime divisors of ｜G｜- Then the degree pattern of G is defined as D（G） = （degG（pl）, degG（p2）,..., degG（pk））, where degG（p） signifies the degree of the vertex p in GK（G）. A finite group H is said to be OD-characterizable if G ≌ H for every finite group G such that ｜G｜ = ｜H｜and D（G） = D（H）. The purpose of this article is threefold. First, it finds sharp upper and lower bounds on v（G）, the sum of degrees of all vertices in GK（G）, for any finite group G （Theorem 2.1）. Second, it provides the degree of vertices 2 and the characteristic p of the base field of any finite simple group of Lie type in their prime graphs （Propositions 3.1-3.7）. Third, it proves the linear groups L4（q）, q = 19, 23, 27, 29, 31, 32, and 37, are OD-characterizable （Theorem 4.2）.

关键词： Prime graph degree pattern simple group

Distributed Healthcare Framework Using MMSM-SVM and P-SVM Classification

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Computers, Materials & Continua 2022年第1期70卷 1557-1572页

作者： r.Sujitha b.Paramasivan Department of Information Technology National Engineering College(Autonomous)Kovilpatti628503TamilnaduIndia

With the modernization of machine learning techniques in healthcare,different innovations including support vector machine(SVM)have predominantly played a major role in classifying lung cancer,predicting coronavirus disease 2019,and other *** particular,our algorithm focuses on integrated datasets as compared with other existing *** this study,parallel-based SVM(P-SVM)andmulticlass-basedmultiple submodels(MMSM-SVM)were used to analyze the optimal classification of lung *** analysis aimed to find the optimal classification of lung diseases with id and stages,such as key-value pairs in Mapreduce combined with P-SVM and MMSVM for binary and multiclasses,*** nonlinear classification,kernel clustering-based SVM embedded with multiple submodels was *** algorithms were developed using Apache spark environment,and data for the analysis were retrieved from microscope lab,UCI,Kaggle,and General Thoracic surgery database along with some electronic health records related to various lung diseases to increase the dataset size to 5 *** measures were conducted using a 5 Gb dataset with five *** size was finally increased,and task analysis and CPU utilization were measured.

关键词： Lung cancer COVID-19 machine learning deep learning parallel based support vector machine multiclass-based multiple submodel

Visco-elastic fluid flow past an infinite vertical porous plate in the presence of first-order chemical reaction

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Applied Mathematics and Mechanics(English Edition) 2010年第8期31卷 955-962页

作者： r.A.DAMSEH b.A.SHANNAK Mechanical Engineering Department Al-Huson University College Al-Balqa Applied University

An analysis has been developed to study the unsteady free convection flow of an incompressible visco-elastic fluid on a continuously moving vertical porous plate in the presence of a first-order chemical reaction. The governing equations are solved numerically using an implicit finite difference technique. The obtained numerical solutions are compared with the analytical solutions. The velocity profiles are presented. A parametric analysis is performed to illustrate the influences of the visco-elastic parameter, the dimensionless chemical reaction parameter, and the plate moving velocity on the steady state velocity profiles, the time dependent friction coefficient, the Nusselt number, and the Sherwood number.

关键词： visco-elastic fluid porous plate chemical reaction free convection

Calculation of the Longitudinal Structure Function from regge-Like behaviour of the Gluon Distribution Function in Leading Order Approximation at Low x

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Chinese Physics Letters 2007年第5期24卷 1187-1190页

作者： G.r. boroun b. rezaie Department of Physics Razi University Kermanshah 67149 Iran

We present the calculations of FL longitudinal structure functions from DGLAP evolution equation in leading order （LO） at low-x, assuming the regge-like behaviour of gluon distribution at this limit. The calculated results are compared with the H1 data and QCD fit. It is shown that the obtained results are very close to the mentioned methods. The proposed simple analytical relation for EL provides a t-evolution equation for the determination of the longitudinal structure function at low-x. All the results can consistently be described within the framework of perturbative QCD, which essentially shows increases as x decreases.

关键词： PrOTON

High-temperature thermodynamics of silver:Semi-empirical approach

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Chinese Physics b 2017年第11期26卷 400-407页

作者： r H Joshi b Y Thakore P r Vyas A r Jani N K bhatt Department of Physics Sardar Patel University Department of Physics School of Sciences Gujarat University Sardar Patel Center for Science and Technology Department of Physics M.K.Bhavnagar University

We report high-temperature thermodynamics for fcc silver by combining ab initio phonon dynamics to empirical quadratic temperature-dependent term for anharmonic part of Helmholtz free energy. The electronic free energy is added through an interpolation scheme, which connects ambient condition free electron gas model to Thomas-Fermi *** present study shows good agreement with experimental and reported findings for several thermal properties, and the discrepancy observed in some caloric properties is addressed. The decreases in the product of volume thermal expansion coefficient and isothermal bulk modulus and in the constant volume anharmonic lattice specific heat at high temperature are the clear evidences of proper account of anharmonicity. The present study also reveals that T-2-dependent anharmonic free energy is sufficient for correct evaluation of thermal pressure and conventional Grüneisen parameter. We observe that the intrinsic phonon anharmonicity starts dominating above characteristic temperature, which is attributed to higher order anharmonicity and can be related to higher order potential derivatives. We conclude that the uncorrelated and largeamplitude lattice vibrations at high temperature raise dominating intrinsic thermal stress mechanism, which surpasses the phonon-anharmonism and requires future consideration.

关键词： thermodynamics anharmonicity Grüneisen parameter silver