Proceedings of the National Academy of Sciences, India Section A: Physical Sciences最新文献

Diameter Estimation of ((m,rho ))-Quasi Einstein Manifolds 准爱因斯坦流形的直径估计

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-10 DOI: 10.1007/s40010-024-00899-3

Absos Ali Shaikh, Prosenjit Mandal, Chandan Kumar Mondal

引用次数: 0

IoT Adoption for Smart Cities Waste Management using Pythagorean Fuzzy MEREC-SWARA-ARAS Method 利用毕达哥拉斯模糊 MEREC-SWARA-ARAS 方法实现物联网应用于智能城市废物管理

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-10 DOI: 10.1007/s40010-024-00902-x

Rishikesh Chaurasiya, Divya Jain

引用次数: 0

Rate of Convergence of (lambda)-Bernstein-Beta type operators 伯恩斯坦-贝塔型算子的收敛率

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-08 DOI: 10.1007/s40010-024-00903-w

Abhishek Senapati, Ajay Kumar, Tanmoy Som

引用次数: 0

Stability Analysis of Hybrid Nanofluid with Inclined MHD and Joule Effects: Flow Reversal and Flow Separation 具有倾斜 MHD 和焦耳效应的混合纳米流体的稳定性分析：流动逆转与流动分离

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-07 DOI: 10.1007/s40010-024-00900-z

Ch. RamReddy, Har Lal Saran

{"title":"Stability Analysis of Hybrid Nanofluid with Inclined MHD and Joule Effects: Flow Reversal and Flow Separation","authors":"Ch. RamReddy, Har Lal Saran","doi":"10.1007/s40010-024-00900-z","DOIUrl":"10.1007/s40010-024-00900-z","url":null,"abstract":"<div><p>In this paper, we have analyzed the stability of multiple solutions for the forced convective flow of Ti-alloy-MWCNT and water-based hybrid nanofluid with inclined MHD and Joule effects over an exponentially shrinking sheet. To provide the mathematical modeling of hybrid nanofluid, the Choi and Eastman model has been adopted. The flow governing equations arising from this analysis are converted into a system of ODEs using suitable similarity variables and then solved numerically using the shooting method. The graphical representations of the results are illustrated to elaborate interesting features in the presence of physically effective parameters like inclined magnetic field, Joule parameter, volume fraction, and suction parameters. As a result, we noticed the existence of dual solutions within the limited range of inclined magnetic, shrinking, and suction parameters. Hence, the stability of these solutions is checked by using temporal stability analysis. Further, we noticed that first solution is stable, whereas second solution is unstable through the smallest eigenvalue approach. Also, the streamlines are displayed to visualize the flow patterns. Moreover, the flow separation point and the flow reversal are identified. Finally, the delay of boundary layer separation is pointed out.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 5","pages":"519 - 532"},"PeriodicalIF":0.8,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review on Thermogravimetric Analysis of Carbon Dots 碳点热重分析综述

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-07 DOI: 10.1007/s40010-024-00901-y

Vishal Rimal, Prem Kumar Srivastava

引用次数: 0

On n-f-Semiclean Rings 关于 n-f-Semiclean 环

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-11-04 DOI: 10.1007/s40010-024-00897-5

Avanish Kumar Chaturvedi, Sandeep Kumar, Nirbhay Kumar

引用次数: 0

Optimal Control Strategies for COVID-19 Using SEIQR Mathematical Model 使用 SEIQR 数学模型的 COVID-19 最佳控制策略

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-10-01 DOI: 10.1007/s40010-024-00898-4

S. Swetha, S. Sindu Devi, K. Kannan

{"title":"Optimal Control Strategies for COVID-19 Using SEIQR Mathematical Model","authors":"S. Swetha, S. Sindu Devi, K. Kannan","doi":"10.1007/s40010-024-00898-4","DOIUrl":"10.1007/s40010-024-00898-4","url":null,"abstract":"<div><p>The aim of this work is to create the SEIQR model for COVID-19 in Saudi Arabia. The inclusion of a quarantine compartment in the model’s architecture is crucial in halting the transmission of disease to the vulnerable class. Simulation had been run in two phases: Phase 1, which ran from January 4, 2020 to June 13, 2020, and phase 2, which ran from June 14, 2020 to March 6, 2021. The SEIQR model analysis yields local stability at the fundamental reproduction number and the disease-free equilibrium point when the next generation matrix approach is used. The reproduction number was determined to be 6.81 when <span>(gamma)</span> was <span>(2.0 times 10^{-9})</span>, 7.49 when <span>(gamma)</span> was <span>(2.2 times 10^{-9})</span> and 8.17 when <span>(gamma)</span> was <span>(2.4 times 10^{-9})</span>. The outcomes of the simulation unambiguously show that phase 2 is the point at which the optimal condition is reached. The most important thing for any disease is to have control methods. Sensitivity analysis has been done as part of control strategies, and after that, a fuzzy reproduction number control approach has been put into practice.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 5","pages":"501 - 512"},"PeriodicalIF":0.8,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalized Berwald Projective Weyl ((GBwidetilde{W})) Metrics 广义贝瓦尔德投影韦尔（GB/widetilde{W})度量

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-10-01 DOI: 10.1007/s40010-024-00896-6

Nasrin Sadeghzadeh

引用次数: 0

A Complete Linkage Algorithm for Clustering Dynamic Datasets 动态数据集聚类的完整链接算法

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-09-25 DOI: 10.1007/s40010-024-00894-8

Payel Banerjee, Amlan Chakrabarti, Tapas Kumar Ballabh

{"title":"A Complete Linkage Algorithm for Clustering Dynamic Datasets","authors":"Payel Banerjee, Amlan Chakrabarti, Tapas Kumar Ballabh","doi":"10.1007/s40010-024-00894-8","DOIUrl":"10.1007/s40010-024-00894-8","url":null,"abstract":"<div><p>In recent years, a vital challenge faced by experts in data science is analyzing the gigantic volume of data coming at high speed. This data avalanche is not only difficult to collect but also demands high time and memory while getting processed. Clustering is a well-known solution to this problem as it not only helps in shrinking the database but also helps in gaining valuable insights from a completely unlabelled dataset. Complete Linkage Clustering is a well-known Hierarchical Clustering algorithm suitable for generating small and highly cohesive clusters but suffers from the disadvantage of high convergence time. The traditional methods require the complete dataset in advance to take a clustering decision which makes it unsuitable for clustering both large and dynamic datasets where new data points are added frequently. This is because, for every addition of data, the entire dataset will be processed again for taking a clustering decision. Our paper presents a fast Complete Linkage Clustering algorithm that uses triangle inequality to avoid a lot of redundant distance calculations making the algorithm faster and suitable for clustering both large and dynamic databases. Experiments have been conducted with various real-world datasets and Adjusted Rand Index has been used for comparing the result with the original Complete Linkage algorithm. The experimental result confirms the effectiveness of our algorithm for both static and dynamic databases.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 5","pages":"471 - 486"},"PeriodicalIF":0.8,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Double Sequences of Bi-complex Numbers 双复数的双序列

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-09-12 DOI: 10.1007/s40010-024-00895-7

Sujeet Kumar, Binod Chandra Tripathy

引用次数: 0