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扭带式换热器水热关联的机器学习辅助建模

Acta Mechanica Sinica 2023年第1期39卷 148-157页

作者： Jyoti Prakash Panda Bipin kumar Anil kumar Patil Manoj kumar Ravi kumar Department of Mechanical Engineering DIT UniversityDehradunUttarakhandIndia

本文介绍了机器学习(ML)算法在带扭带插件的换热器传热关联(如努塞尔数和摩擦系数)建模中的应用.采用换热器在不同雷诺数(Re)、扭转比(t)、穿孔率(p)和不同扭带数(n)下的实验数据进行相关建模.在数据驱动的代理建模中使用了三种机器学... 详细信息

本文介绍了机器学习(ML)算法在带扭带插件的换热器传热关联(如努塞尔数和摩擦系数)建模中的应用.采用换热器在不同雷诺数(Re)、扭转比(t)、穿孔率(p)和不同扭带数(n)下的实验数据进行相关建模.在数据驱动的代理建模中使用了三种机器学习算法:多项式回归(PR)、随机森林(RF)和人工神经网络(ANN).为了保证模型的通用性,对ML模型的超参数进行了优化,分析了不同ML算法的性能参数(如R 2和MAE).结果表明,在不同的测试数据集上,人工神经网络对传热系数的预测优于PR和RF的预测.基于本文分析内容,对未来数据驱动的传热关联建模工作和类似研究提出了建议.

关键词：机器学习数据驱动测试数据集辅助建模多项式回归超参数穿孔率

Phenazine-based supramolecular photosensitizing assemblies:A“smart”selectivity control on catalytic activity of Pd(Ⅱ)nanoparticles

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聚集体(英文)

聚集体(英文) 2023年第1期4卷 173-183页

作者： Aditya Singh Manoj kumar Vandana Bhalla Department of Chemistry UGC Sponsored-Centre of Advance Studies-ⅡGuru Nanak Dev UniversityAmritsarPunjabIndia

Photosensitizing supramolecular assemblies based on a phenazine derivative(PPA)have been developed,which show a strong affinity toward Pd2+ions to generate supramolecular ensemble PPA@Pd nanoparticles(NPs).The PPA@Pd NPs catalyse the Suzuki cross-coupled reaction under mild conditions(aerial conditions,mixed aqueous media,and visible light radiations).Although PPA@Pd NPs exhibit a strong affinity for arylboronic acid and could catalyse homocoupling of arylboronic acid,the preference of PPA assemblies for aryl halide directed the course of reactions toward the formation of cross-coupled products.The electron-rich PPA assemblies not only facilitate the oxidative addition step through photoinduced electron transfer to Pd^(2+)ions but also bring the reactants closer to the catalytic sites by selective interactions with aryl halides in the presence of arylboronic acid under visible light irradiation.The efficiency of PPA@Pd NPs to catalyse the Suzuki crosscoupled reaction has been demonstrated for the synthesis of unsymmetrically substituted terphenyl derivatives.

关键词： ensemble homocoupling phenazine photosensitizing supramolecular assemblies Suzuki cross-coupled

Positive solutions and stability of fuzzy Atangana–Baleanu variable fractional differential equation model for a novel coronavirus (COVID-19)

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第6期12卷 205-229页

作者： Pratibha Verma Manoj kumar Department of Mathematics Motilal Nehru National Institute of Technology Allahabad Prayagraj 211004 Uttar PradeshIndia

This work provides a new fuzzy variable fractional COVID-19 model and uses a variablefractional operator, namely, the fuzzy variable Atangana–Baleanu fractional derivativesin the Caputo sense. Next, we explore the proposed fuzzy variable fractional COVID-19 model using the fixed point theory approach and determine the solution’s existenceand uniqueness conditions. We choose an appropriate mapping and with the help ofthe upper/lower solutions method. We prove the existence of a positive solution for theproposed fuzzy variable fractional COVID-19 model and also obtain the result on theexistence of a unique positive solution. Moreover, we discuss the generalized Hyers–Ulam stability and generalized Hyers–Ulam–Rassias stability. Further, we investigate theresults on maximum and minimum solutions for the fuzzy variable fractional COVID-19model.

关键词： Novel coronavirus(COVID-19) variable Atangana–Baleanu fractional derivative Mittag–Leffler kernel existence and uniqueness fixed point theorems Hyers–Ulam stability

Multilayer perceptron and Chebyshev polynomials-based functional link artificial neural network for solving differential equations

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第2期12卷 104-119页

作者： Shagun Panghal Manoj kumar Department of Mathematics Motilal Nehru National Institute of Technology Allahabad 211004 India

This paper discusses the issues of computational efforts and the accuracy of solutions of differential equations using multilayer perceptron and Chebyshev polynomials-based functional link artificial neural networks.Some ordinary and partial differential equations have been solved by both these techniques and pros and cons of both these type of feedforward networks have been discussed in detail.Apart from that,various factors that affect the accuracy of the solution have also been analyzed.

关键词： Multilayer perceptron optimization functional link neural network trial solution Chebyshev polynomials

Information hiding with adaptive steganography based on novel fuzzy edge identification

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Defence Technology（防务技术） 2019年第2期15卷 162-169页

作者： Sanjeev kumar Amarpal Singh Manoj kumar I.K.G Punjab Technical University Department of ECE Beant College of Engineering & Technology DAV Institute of Engineering & Technology

The evolution in communication techniques has created wide threats for crucial information transfer through a communication channel. Covert communication with steganography is a skill of concealing secret information within cover object and hence shields the data theft over rapidly growing network.Recently, diverse steganography techniques using edge identification have been proposed in literature.Numerous methods however utilize certain pixels in the cover image for inserting edge information,resulting in significant deformation. The conventional edge detection method limits the deployment of edge detection in steganography as concealing the information would introduce some variations to the cover image. Hence inserting data in pixel areas recognized by existing conventional edge detection techniques like canny cannot ensure the recognition of the exact edge locations for the cover and stego images. In this paper, an Adaptive steganography method based on novel fuzzy edge identification is proposed. The method proposed is proficient of estimating the precise edge areas of a cover image and also ensures the exact edge location after embedding the secret message. Experimental results reveal that the technique has attained good imperceptibility compared to the Hayat AI-Dmour and Ahmed AIAni Edge XOR method in spatial domain.

关键词： Information security Adaptive steganography Fuzzy edge detection Pattern recognition

Numerical solution for singular differential equations using Haar wavelet

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International Journal of Modeling, Simulation, and Scientific Computing 2020年第5期11卷 31-45页

作者： Shitesh Shukla Manoj kumar Department of Mathematics Motilal Nehru National Institute of Technology Allahabad Prayagraj-211004(U.P) India

The aim of this paper is to obtain the numerical solution of singular ordinary differential equations using the Haar-wavelet approach.The proposed method is mathematically simple and provides highly accurate solutions.In this method,we derive the Haar operational matrix using Haar function.Haar operational matrix is a basic tool and applied in system analysis to evaluate the numerical solution of differential equations.The convergence of the proposed method is discussed through its error analysis.To illustrate the efficiency of this method,solutions of four singular differential equations are obtained.

关键词： Haar operational matrix singularity quasilinearization technique piecewise continuous function

Preventable iatrogenic cause of foot-drop in knee injuries with literature review

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Chinese Journal of Traumatology 2022年第4期25卷 224-231页

作者： Anant Krishna Sumit Arora Rakesh Goyal Manish kumar Nirup Naik Manoj kumar Department of Orthopaedics All India Institute of Medical SciencesAnsari NagarNew Delhi110029India Department of Orthopaedic Surgery Maulana Azad Medical College&Associated Lok Nayak HospitalNew Delhi110002India

Purpose Common peroneal nerve palsy is quite disabling and every effort should be made to prevent its injury during the treatment.Methods We retrospectively reviewed the prospectively collected data of 7 cases of tibial plateau fractures in association with proximal fibula fracture from January 2019 to September 2019 who presented to emergency room of our hospital.Results In addition to fibular neck fracture,the first case had type 6 tibial plateau displaced fracture and the second case had displaced acetabular fracture with instability of knee with tibial tuberosity avulsion.common peroneal nerve palsy developed following application of distal tibial skeletal traction in both the cases.Other 6 such cases remained neurologically intact as traction was not applied to them.Conclusion Such iatrogenic complication could have been prevented if the injury pattern of"concomitant medial and lateral columns"of the proximal leg is kept in mind by the treating surgeon before applying skeletal traction.

关键词： Common peroneal neuropathies Tibial plateau fractures Proximal fibula fractures Traction palsy

Application of Response Surface Methodology for Analysing and Optimizing the Finned Solar Air Heater

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Journal of Thermal Science 2024年第3期33卷 985-1009页

作者： Vineet SINGH Vinod Singh YADAV Vaibhav TRIVEDI Manoj kumar Niraj kumar Department of Mechanical Engineering School of Engineering&TechnologyIFTM UniversityMoradabadUttar PradeshIndia Department of Mechanical Engineering NITUttarakhandPauriUttarakhandIndia Department of Electronics and Communication Engineering Jaypee Institute of Information TechnologyNoidaUttar Pradesh201309India

In this research paper,a solar air heater with triangular fins has been experimentally analysed and optimized.Initially,an experimental set-up of a solar air heater having triangular fins has been developed at the location of 28.10°N,78.23°E.The heat transfer rate through fins and fins efficiency has been determined by the Finite Difference Method model equations.The experimental data and modeled data of response parameters have been optimized in MINITAB-17 software by the Response Surface Methodology tool.For creating the response surface design,three input parameters have been selected namely solar intensity,Reynolds number,and fin base-to-height ratio.The range of solar intensity,Reynolds number,and fin base-to-height ratio is 600 to 1000W/m^(2),4000 to 6000,and 0.4 to 0.8 respectively.The response surface design has been analyzed by calculating the outlet temperature,friction factor,Nusselt number,fin efficiency,thermal performance factor,and exergy efficiency.The optimum settings of input parameters:solar intensity is 1000 W/m^(2);Reynolds number is 4969.7,and the fin base to height ratio is 0.6060,on which these response:namely outlet temperature of 92.531℃,friction factor of 0.2350,Nusselt number of 127.761,thermal efficiency of 50.836%,thermal performance factor of 1.4947,and exergy efficiency of 8.762%.

关键词： solar air heater optimization fins exergy response surface methodology air

An analytical solution with existence and uniqueness conditions for fractional integro-differential equations

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International Journal of Modeling, Simulation, and Scientific Computing 2020年第5期11卷 147-169页

作者： Pratibha Verma Manoj kumar Department of Mathematics Motilal Nehru National Institute of Technology AllahabadPrayagraj-211004Uttar PradeshIndia

This study aims to apply the two-step Adomian decomposition method(TSADM)to find an analytical solution of integro-differential equations for fractional order without discretization/approximation with less number of iterations and reduce the computational efforts.Moreover,we have established the results for the existence and uniqueness of a solution with the help of some fixed point theorems and the Banach contraction principle.Furthermore,the method is demonstrated on different test examples arising in real life situations.It is concluded that the TSADM provides exact solution of the fractional integro-differential equations in one iteration.At the same time,the other existing methods furnish an approximate solution and require lots of computation to solve the problem applying discretization/approximation on fractional operators.

关键词： Caputo fractional derivative two-step Adomian decomposition method integro-differential equation fixed point theorem