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Resistance and resilience of soil biological indicators:A case study with multi-walled carbon nanotube

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Pedosphere 2024年第3期34卷 664-675页

作者： Shagufta YASMEEN Nintu MANDAL Anupam DAS Pritam GANGULY sanjay kumar Rajiv RAKSHIT Department of Soil Science and Agricultural Chemistry Bihar Agricultural UniversitySabourBhagalpur 813210(India) Department of Agronomy Bihar Agricultural UniversitySabourBhagalpur 813210(India)

Soil ecosystem is experiencing stresses due to climate change,and soil inhabitants try to demonstrate their inherent resistance and resilience against those *** of nanomaterials as agricultural inputs could bring shifts in resistance and resilience patterns of soil microbes and associated enzymes,especially under short-term heat *** this background,the impacts of multi-walled carbon nanotube(MWCNT)on the resistance and resilience of soil biological indicators were *** incubation experiment was conducted with varied MWCNT concentrations(0,50,100,250,and 500 mg kg-1soil)for 90 d after 24-h heat stress at 48±2?C to assess the impacts of MWCNT on soil enzyme activities and microbial populations vis-à-vis their resistance and resilience indices under short-term exposure to heat *** activities were reduced after exposure to heat *** indices of enzyme activities were enhanced by MWCNT application on day 1 after heat stress,whereas there was no recovery of enzyme activities after 90-d *** soil enzyme activities,resistance index values of soil microbial populations followed the similar trend and were improved by MWCNT ***-walled carbon nanotube has the potential to improve resistance indices of soil enzyme activities and microbial populations under heat stress,although they could not recover to their original state during periodical incubation after heat *** study helps to understand the relative changes of biological indicators under MWCNT and their ability to withstand heat stress.

关键词： enzyme activity heat stress microbial population nanomaterial recovery

Machine Learning Techniques Using Deep Instinctive Encoder-Based Feature Extraction for Optimized Breast Cancer Detection

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Computers, Materials & Continua 2024年第2期78卷 2441-2468页

作者： Vaishnawi Priyadarshni sanjay kumar Sharma Mohammad Khalid Imam Rahmani Baijnath Kaushik Rania Almajalid Department of Computer Science Gautam Buddha UniversityGreater NoidaUttar PradeshIndia College of Computing and Informatics Saudi Electronic UniversityRiyadh11673Saudi Arabia School of Computer Science Shri Vaishno Devi UniversityKatraIndia

Breast cancer(BC)is one of the leading causes of death among women worldwide,as it has emerged as the most commonly diagnosed malignancy in *** detection and effective treatment of BC can help save women’s *** an efficient technology-based detection system can lead to non-destructive and preliminary cancer detection *** paper proposes a comprehensive framework that can effectively diagnose cancerous cells from benign cells using the Curated Breast Imaging Subset of the Digital Database for Screening Mammography(CBIS-DDSM)data *** novelty of the proposed framework lies in the integration of various techniques,where the fusion of deep learning(DL),traditional machine learning(ML)techniques,and enhanced classification models have been deployed using the curated *** analysis outcome proves that the proposed enhanced RF(ERF),enhanced DT(EDT)and enhanced LR(ELR)models for BC detection outperformed most of the existing models with impressive results.

关键词： Autoencoder breast cancer deep neural network convolutional neural network image processing machine learning deep learning

A multiplicative Gauss-Newton minimization algorithm:Theory and application to exponential functions

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Applied Mathematics(A Journal of Chinese Universities) 2021年第3期36卷 370-389页

作者： Anmol Gupta sanjay kumar Department of Electronics and Communication Engineering Thapar Institute of Engineering and TechnologyPatiala 147004India

Multiplicative calculus(MUC)measures the rate of change of function in terms of ratios,which makes the exponential functions significantly linear in the framework of ***,a generally non-linear optimization problem containing exponential functions becomes a linear problem in *** this as motivation,this paper lays mathematical foundation of well-known classical Gauss-Newton minimization(CGNM)algorithm in the framework of *** paper formulates the mathematical derivation of proposed method named as multiplicative Gauss-Newton minimization(MGNM)method along with its convergence *** proposed method is generalized for n number of variables,and all its theoretical concepts are authenticated by simulation *** case studies have been conducted incorporating multiplicatively-linear and non-linear exponential *** simulation results,it has been observed that proposed MGNM method converges for 12972 points,out of 19600 points considered while optimizing multiplicatively-linear exponential function,whereas CGNM and multiplicative Newton minimization methods converge for only 2111 and 9922 points,***,for a given set of initial value,the proposed MGNM converges only after 2 iterations as compared to 5 iterations taken by other methods.A similar pattern is observed for multiplicatively-non-linear exponential ***,it can be said that proposed method converges faster and for large range of initial values as compared to conventional methods.

关键词： multiplicative calculus multiplicative least square method multiplicative Newton minimization multiplicative Gauss-Newton minimization non-linear exponential functions

Handling higher order time series forecasting approach in intuitionistic fuzzy environment

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Journal of Control and Decision 2020年第4期7卷 327-344页

作者： Abhishekh sanjay kumar Department of Mathematics Institute of ScienceBanaras Hindu UniversityVaranasi 221005India

This study presents a new method of forecasting based on a higher order intuitionistic fuzzy time series(FTS)by transforming FTS data into intuitionistic FTS data via defining their appropriate membership and non-membership *** fuzzification of time series data is intuitionistic fuzzification which is based on the maximum score degree of intuitionistic fuzzy ***,the intuitionistic fuzzy logical relationship groups are defined and introduced into a defuzzification process for a higher order intuitionistic FTS that enhances in the forecasted *** order to assess the performance of the proposed method,the method has been implemented on the historical data of rice *** comparison result shows that the proposed method can achieve a better forecasting accuracy rate in terms of RMSE and MAPE than the existing methods such as Song and Chissom[(1993).Forecasting enrolments with fuzzy time series-Part *** Sets and System,54,1-9],Chen[(1996).Forecasting enrolments based on fuzzy time *** Sets and System,81,311-319],Singh[(2007a).A simple method of forecasting based on fuzzy time *** Mathematics and Computation,186,330-339]and Abhishekh,Gautam,and Singh[(2017).A refined weighted method for forecasting based on type 2 fuzzy time *** Journal of ModellingandSimulation,38,180-188;(2018).A score function based method of forecasting using intuitionistic fuzzy time *** Mathematics and Natural Computation,14(1),91-111].

关键词： Fuzzy time series intuitionistic fuzzy number membership grades accuracy function higher order IFLR

Quadrature Based Optimal Iterative Methods with Applications in High-Precision Computing

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Numerical Mathematics(Theory,Methods and Applications) 2012年第4期5卷 592-601页

作者： sanjay kumar Khattri Stord/Haugesund University College Department of EngineeringHaugesundNorway

We present a simple yet effective and applicable scheme,based on quadrature,for constructing optimal iterative *** to the,still unproved,Kung-Traub conjecture an optimal iterative method based on n+1 evaluations could achieve a maximum convergence order of *** quadrature,we develop optimal iterative methods of orders four and *** scheme can further be applied to develop iterative methods of even higher *** results demonstrate that the developed methods are efficient as compared with many well known methods.

关键词： Iterative methods fourth order eighth order quadrature Newton convergence nonlinear optimal

Adaptive Neuro Fuzzy Inference System Based Decoupled Control for Neutral Point Clamped Multi Level Inverter Fed Induction Motor Dri

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Chinese Journal of Electrical Engineering 2021年第2期7卷 70-82页

作者： Giribabu Dyanamina sanjay kumar Kakodia Department of Electrical Engineering Maulana Azad National Institute of TechnologyBhopalM.P 462003India

The presence of an integrator in a reference model of a rotor flux-based model reference adaptive system(RF-MRAS)and non-linearity of the inverter in the output voltage degrade the speed response of the sensorless operation of the electric drive system in terms of DC drift,initial value issues,and inaccurate voltage *** improve the speed response,a compensating voltage component is supplemented by an amending *** compensating voltage is a coalition of drift and offset voltages,and reduces DC drift and initial value *** low-speed operation,inaccurate voltage acquisition distorts the stator voltage critically,and it becomes considerable when the stator voltage of the machine is *** a three-level neutral point clamped inverter in speed-sensorless decoupled control of an induction motor improves the performance of the drive with superior quality of inverter output ***,the performance of the induction motor drive is improved by replacing the proportional-integral(PI)controller in the adaption mechanism of RF-MRAS with an adaptive neuro-fuzzy inference system(ANFIS)controller.A prototype model of the three-level neutral point clamped inverter(3L-NPC)-fed induction motor drive is fabricated in a laboratory,and its performance for a RF-MRAS,modified RFMRAS,and modified RFMRAS using ANFIS are compared using different benchmark tests.

关键词： Induction motor drive vector control neutral point clamped inverter model reference adaptive system ANFIS

Dynamic Behaviour of Pond Ash Mixed with Coir and Crumb Rubber

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Journal of Renewable Materials 2023年第3期11卷 1271-1291页

作者： Ashish Malik sanjay kumar Singh Civil Engineering Department Punjab Engineering College(Deemed to be University)Chandigarh160012India

An experimental program was conducted to determine the dynamic properties of pond ash(PA)and pond ash mixed with admixtures like crumb rubber(CR)and coir fiber(CF)which are wastes of different *** CR and CF were mixed separately with pond ash in a percentage ranging from 0%–20%at an interval of 5%and 0%–2%at an interval of 0.5%by weight of pond ash,*** properties(Shear modulus,Number of cycles to initiate liquefaction,Degradation index and Damping ratio)for pond ash mixes were determined using strain-controlled cyclic tri-axial *** shear strain was kept constant at 1.2%and the frequency varied from 0.4 to 1 *** resistance improves when crumb rubber is added to pond ash,however adding Coir fiber to pond ash has essentially no effect on the number of cycles required to initiate *** dynamic shear modulus decreases when crumb rubber was mixed in pond ash whereas when coir fiber is added to pond ash,the dynamic shear modulus increases significantly.A mix of PA,CR,and CF was also tried to balance the number of cycles required to initiate liquefaction and shear *** mixed sample in the proportion of PA(84%)+CR(15)+CF(1%)can be termed a balanced mix as the number of cycles to initiate liquefaction was more than all PA-CF mixes and also the shear modulus was more than all PA-CR *** ratio increases with increasing frequency of loading(0.4 to 1 Hz).

关键词： Pond ash coir crumb rubber cyclic loading liquefaction

Swallowing of Casson fluid in oesophagus under the influence of peristaltic waves of varying amplitude

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International Journal of Biomathematics 2017年第2期10卷 49-64页

作者： sanjay kumar Pandey Shailendra kumar Tiwarit Indian Institute of Technology (BHU) Varanasi 221005 India

The experimentally verified fact that there is a high pressure zone in the lower part of the oesophagus has established that the earlier models fall short of representing the realistic swallowing process in the oesophagus. Since the high pressure is created by gradually increasing amplitudes of peristaltic waves, swallowing of Casson fluid in oesophagus is mathematically remodeled. It is revealed that in the case of exponentially increasing amplitude, pressure is non-uniformly distributed for different cycles. Pressure increases along the entire length of the oesophagus; and finally toward the end of the oesophageal flow, it increases quite significantly, probably to ensure delivery into the stomach. This is a similar observation for Newtonian as well as non-Newtonian fluids but Casson fluids need more pressure; and hence more efforts are required by the oesophagus to transport the fluid forward. When wave amplitude is small, flow rates are small. In such a case, Casson fluid requires higher flow rates for reflux to occur in comparison to Newtonian fluid. This tendency gradually diminishes with increasing amplitude. For a particular value of amplitude, there is no difference; and beyond that the trends are quite opposite. Thus, Casson fluid is found to be less prone to reflux near the wall. It is also concluded that for the Newtonian fluid as well as for the non-Newtonian Casson fluid, reflux is more likely to occur with increasing amplitude and it is further augmented by the addition of amplifying parameter.

关键词： Oesophagus peristalsis varying amplitude Casson fluid.

Thermal performance and comfort assessment of U-shape and helical shape earth-air heat exchanger in India

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Energy and Built Environment 2022年第2期3卷 171-180页

作者： Anuj Mathur sanjay kumar Mechanical Engineering Department Global Institute of TechnologyJaipur 302022India Mechanical Engineering Department Dr.B R Ambedkar National Institute of TechnologyJalandhar 144011India

Earth Air Tunnel Heat Exchanger(EATHE)systems are not so much popular in India because of restricted acces-sibility of ground space in majority of residential and commercial *** the present article,thermal perfor-mance of newly designed helical shaped EATHE system has been compared with conventional U-shaped EATHE system by keeping similar geometrical and operational configuration for the summer(April-June)and winter(December-February),*** this regard,therefore,numerical model of both EATHE systems have been designed and experimentally *** thermal performance of both EATHE systems has been compared in terms of outlet air temperature and *** present numerical study suggested that the newly designed helical EATHE system exhibits better thermal performance with lower ground requirement as compared to con-ventional U-shaped EATHE *** evaluate the thermal comfort potential of EATHE system in office buildings of India,composite climate specific adaptive thermal comfort boundaries has been *** detailed thermal performance behaviour of the EATHE system suggests that an additional 80%of the time;ambient air condi-tions became thermally comfortable during peak summer *** addition,analysis of the results revealed that EATHE system has more potential during heating operation mode to maintain indoor comfort in winter season of composite climate in India.

关键词： EATHE system U-shaped EATHE Helical EATHE Thermal comfort Summer cooling Winter heating