Proceedings of the National Academy of Sciences, India Section A: Physical Sciences最新文献_第9页

On the Equivalence of Two Non-Riemannian Curvatures in Warped Product Finsler Metrics 翘曲积Finsler度量中两个非黎曼曲率的等价性

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-02-17 DOI: 10.1007/s40010-023-00817-z

Bankteshwar Tiwari, Ranadip Gangopadhyay, Anjali Shriwastawa

引用次数: 1

Analytical Solution for Unsteady Adiabatic Flow Behind the Blast Wave in a Non-ideal Gas and Small Inert Solid Particles Mixture 非理想气体和惰性小固体颗粒混合物中冲击波后非定常绝热流动的解析解

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-02-13 DOI: 10.1007/s40010-023-00811-5

G. Nath

{"title":"Analytical Solution for Unsteady Adiabatic Flow Behind the Blast Wave in a Non-ideal Gas and Small Inert Solid Particles Mixture","authors":"G. Nath","doi":"10.1007/s40010-023-00811-5","DOIUrl":"10.1007/s40010-023-00811-5","url":null,"abstract":"<div><p>In this paper, the self-similar solutions for a strong cylindrical or spherical blast (shock) wave in real gas and inert solid particles mixture are analyzed on the basis of the perturbation method. The similarity solution in analytical forms is derived for first-order approximation, and a set of ODE for second-order approximations is also derived using the perturbation method proposed by Sakurai in perfect gas. The physical variable’s distribution in the entire flow field after the blast wave is shown in the figures. The effects of the ratio of the density of the solid inert particles to the initial gas density, mass concentration of particles, and the parameter of real gas effect on the physical variables, the peak pressure on blast wave and the damage radius of blast wave are investigated. It is found that the peak pressure on the blast wave and the damage radius of the blast wave both decrease with an increase in the value mass concentration of solid particles or non-idealness of the gas in the mixture. A comparison has also been made between the cylindrical and spherical geometries. It is found that the blast (shock) wave is more influential in the case of spherical geometry in contrast to that in the cylindrical geometry case. Also, the blast wave decay is due to an increase in the solid particle’s mass concentration or gas non-idealness parameter, and its strength increases with an increase in the ratio of the solid particles to the initial gas density.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"279 - 292"},"PeriodicalIF":0.9,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4533321","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

Partial Trade-Credit Policy Under Preservation Technology: A Mathematical Analytic Approach to Inventory Models 保存技术下的部分贸易信贷政策:库存模型的数学分析方法

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-02-11 DOI: 10.1007/s40010-022-00806-8

Vandana

引用次数: 0

On the Structure of a Viscous Shock-Front in a Two-Phase Gas–Particle Medium 气-颗粒两相介质中粘性激波阵面结构的研究

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-21 DOI: 10.1007/s40010-023-00810-6

R. K. Anand, Anmol Singh

引用次数: 0

Probabilistic Uplift Resistance of Pipe Buried in Spatially Random Cohesionless Soil 空间随机无粘性土中埋管的概率上拔阻力

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-20 DOI: 10.1007/s40010-022-00808-6

Debarghya Chakraborty

{"title":"Probabilistic Uplift Resistance of Pipe Buried in Spatially Random Cohesionless Soil","authors":"Debarghya Chakraborty","doi":"10.1007/s40010-022-00808-6","DOIUrl":"10.1007/s40010-022-00808-6","url":null,"abstract":"<div><p>The lower bound finite element limit analysis technique in conjunction with the second-order conic optimization is used to determine the uplift resistance of pipeline buried in spatially random cohesionless soil. The Cholesky decomposition method is employed to produce the spatially random discretized soil domain. The Monte Carlo simulation technique is implemented to obtain the probabilistic responses. The mean uplift factor and the failure probability of the pipeline for a wide range of practical cases of soil spatial variability are provided as the design charts. It is found that for the smaller value of correlation distance, the deterministic uplift factor is always higher than the mean uplift factor; however, with the increase in the correlation distance, the difference between the deterministic uplift factor and the mean uplift factor reduces. The probability of failure of pipeline is found to be increasing with the reduction in the magnitude of correlation distance and factor of safety. The influence of the soil spatial variability on the failure mechanism is also studied in detail.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"355 - 368"},"PeriodicalIF":0.9,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40010-022-00808-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4789612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Four Electronically Tunable Wien-Bridge Sinusoidal Oscillators 四个电子可调谐的温氏桥正弦振荡器

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-20 DOI: 10.1007/s40010-022-00807-7

Yong-An LI

引用次数: 0

FAT-ETO: Fuzzy-AHP-TOPSIS-Based Efficient Task Offloading Algorithm for Scientific Workflows in Heterogeneous Fog–Cloud Environment 基于fuzzy - ahp - topsis的异构雾云环境下科学工作流高效任务分流算法

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-20 DOI: 10.1007/s40010-023-00809-z

Prashant Shukla, Sudhakar Pandey, Pranshul Hatwar, Anushka Pant

{"title":"FAT-ETO: Fuzzy-AHP-TOPSIS-Based Efficient Task Offloading Algorithm for Scientific Workflows in Heterogeneous Fog–Cloud Environment","authors":"Prashant Shukla, Sudhakar Pandey, Pranshul Hatwar, Anushka Pant","doi":"10.1007/s40010-023-00809-z","DOIUrl":"10.1007/s40010-023-00809-z","url":null,"abstract":"<div><p>Due to the inherent variation across fog, cloud and end devices, task offloading and resource allocation have become complicated issues in a heterogeneous fog–cloud computing environment (HFCE). This study makes an effort to resolve the issue using two popular multi-criteria decision-making (MCDM) techniques, i.e. the analytic hierarchy process (AHP) and technique for order of preference by similarity to ideal solution (TOPSIS). In this study, we present a rank-based computation offloading algorithm for mapping of workflow tasks on three tiers of resources in HFCE. The five performance criteria taken into account are execution time, energy consumption, total cost, resource availability at a specific tier and the processing speed of resources. These performance criteria of the fog, cloud and end devices are evaluated by cascading two separate MCDM techniques. The AHP is used to calculate the priority weights between all the five criteria of evaluation. The TOPSIS method is used to rank the final fog, cloud and end devices, based on the weights of criteria yielded by AHP, and to calculate fuzzy values before offloading each corresponding task. Afterwards, a task can be offloaded to a corresponding resource tier based on the rank. Simulation results demonstrate that the proposed algorithm outperforms conventional offloading algorithms in the HFCE by including performance and cost criteria while offloading decision making, especially in cases where the amount of tasks is large.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 2","pages":"339 - 353"},"PeriodicalIF":0.9,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4789113","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: 5

Higher-Order Bernstein–Kantorovich Operators 高阶Bernstein-Kantorovich算子

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-18 DOI: 10.1007/s40010-022-00804-w

Anjali, Vijay Gupta

引用次数: 1

Theoretical and Numerical Analysis of Fractional Order Mathematical Model on Recent COVID-19 Model Using Singular Kernel 基于奇异核的新型冠状病毒模型分数阶数学模型的理论与数值分析

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-01-09 DOI: 10.1007/s40010-022-00805-9

Pratibha Verma, Surabhi Tiwari, Akanksha Verma

引用次数: 2

Effect of Seismicity on the Seismic Resilience of a R.C. Building 地震活动性对钢筋混凝土建筑抗震性能的影响

IF 0.9 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2022-12-24 DOI: 10.1007/s40010-022-00803-x

S. Prasanth, Goutam Ghosh

{"title":"Effect of Seismicity on the Seismic Resilience of a R.C. Building","authors":"S. Prasanth, Goutam Ghosh","doi":"10.1007/s40010-022-00803-x","DOIUrl":"10.1007/s40010-022-00803-x","url":null,"abstract":"<div><p>This study was carried out to evaluate the functionality of an existing reinforced concrete structure under various ground motions along with its seismic resilience. An existing high-rise G + 10 storey reinforced concrete building which was designed for a specific ground motion with peak ground acceleration (PGA) of 0.36 g was subjected to various seismicity with respect to different ground motions of PGA ranges from 0.10 to 1.70 g. For each case, the performance level and structural damage ratio were estimated by performing nonlinear static pushover analysis. The influences of different ground motions on the structural functionality and seismic resilience were examined using three recovery functions namely, linear, trigonometric and exponential. The result shows that the maximum number of hinges formed with the performance level close to or just exceeding the level of collapse prevention at the maximum considered PGA of 1.50 g and 1.70 g with loss of resilience up to 36.25%. The maximum level of PGA that the existing building would withstand along with likelihood of recovery has been obtained.\u0000</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"93 1","pages":"147 - 161"},"PeriodicalIF":0.9,"publicationDate":"2022-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40010-022-00803-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4928843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0