Proceedings of the National Academy of Sciences, India Section A: Physical Sciences最新文献_第3页

Forecasting the Semg Signal Using Wavelet Transform and Anfis Model 利用小波变换和 Anfis 模型预测 Semg 信号

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-04-15 DOI: 10.1007/s40010-024-00877-9

Tanu Sharma, K. P. Sharma

引用次数: 0

Validation and Calibration of Tropospheric Wet Delay Models over Nigeria Using GPS Data 利用全球定位系统数据验证和校准尼日利亚对流层湿延迟模型

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-03-06 DOI: 10.1007/s40010-024-00873-z

Samuel Ogunjo, Joseph Dada

{"title":"Validation and Calibration of Tropospheric Wet Delay Models over Nigeria Using GPS Data","authors":"Samuel Ogunjo, Joseph Dada","doi":"10.1007/s40010-024-00873-z","DOIUrl":"10.1007/s40010-024-00873-z","url":null,"abstract":"<div><p>Tropospheric delay play a critical role in satellite communication. Due to lack of measuring instruments, tropospheric wet delays are often estimated using empirical models. In this study, we investigated the performance of four (Saastamoinen, Callahan, Mendes, and Berman) models in four tropical locations within Nigeria. By comparing with GPS data, our results showed that the models generate errors on the same magnitude as the measurement data. The Saastamoinen and Mendes models were found to have the best performance amongst the four models at the monthly and annual scale. At the annual scale, RMSE values of 0.12–0.18 and 0.11–0.16 were obtained for Saastamoinen and Mendes models, respectively, compared to 0.19–0.29 for both Callahan and Berman models. In order to improve the performance of the wet delay models, calibration of their parameters was carried out. It was observed that the new parameters improved the performance of the models significantly. The results in this study will help reduce the uncertainties associated with estimating wet delays in tropical regions.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 2","pages":"185 - 192"},"PeriodicalIF":0.8,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045026","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}

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On the Structure of Magnetohydrodynamics Shock Waves in Viscous van der Waals gases 论粘性范德瓦耳斯气体中磁流体力学冲击波的结构

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-03-05 DOI: 10.1007/s40010-024-00872-0

Sewa Singh, Raj Kumar Anand

{"title":"On the Structure of Magnetohydrodynamics Shock Waves in Viscous van der Waals gases","authors":"Sewa Singh, Raj Kumar Anand","doi":"10.1007/s40010-024-00872-0","DOIUrl":"10.1007/s40010-024-00872-0","url":null,"abstract":"<div><p>An analytical model has been developed to explore the structure of one-dimensional viscous shock waves in the presence of an axial magnetic field assuming the gaseous medium to follow the van der Waals equation of state. The exact solutions for pressure, temperature, fluid velocity and entropy are obtained taking into account the dissipative processes in the shock transition region. The detailed analysis of the structure of shock-front has been presented showing the dependence of the thickness of shock-front on the adiabatic index, the strength of magnetic field, coefficient of viscosity, shock strength and the non-idealness parameter of the gases. The findings are presented in graphical as well as in tabular forms which reveal that the shock-front thickness increases with increasing the strength of magnetic field and the viscous coefficient of gases, whereas it decreases with the increasing value of non-idealness parameter of the gases. Finally, a comparison has been done between the current findings following the van der Waals equation of state and the previously available data following the Anisomov and Spiner equation of state.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 2","pages":"259 - 268"},"PeriodicalIF":0.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045028","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

Moringa Oliefera: A Phytochemical and Biological Study in Combination with Medicinal Potential Spices Moringa Oliefera：与药用香料相结合的植物化学和生物学研究

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-02-19 DOI: 10.1007/s40010-024-00870-2

G. Devi, K. Sudhakar, R. Surekha, B. Kalpana

{"title":"Moringa Oliefera: A Phytochemical and Biological Study in Combination with Medicinal Potential Spices","authors":"G. Devi, K. Sudhakar, R. Surekha, B. Kalpana","doi":"10.1007/s40010-024-00870-2","DOIUrl":"10.1007/s40010-024-00870-2","url":null,"abstract":"<div><p><i>Moringa</i> plants are now largely employed as a nutritional supplement, to enhance soil quality, and in water filtering systems. <i>Moringa</i> is a natural antioxidant and has antimicrobial property. They are also a rich supply of oil, which is a popular and significant revenue source. As a consequence, these plants have a diverse set of characteristics and uses on their own, and their activity is enhanced when coupled with other materials. In this article, the phytochemical analysis, antioxidant, and antimicrobial activity of <i>moringa</i> powder blended with the medicinally significant spices turmeric (<i>Curcuma longa</i>), pepper (<i>Piper nigrum</i>), dry ginger (<i>Zingiber Officinale</i>), and dry orange peel powder (<i>Citrus Aurantium</i> Dulcis). The <i>moringa</i> blends formed by mixing with above-mentioned spices were subjected to antioxidant activity by DPPH assay and antimicrobial activity by well diffusion method. Total phenolic contents and the flavonoid contents were determined using phytochemical analysis. Using FTIR spectroscopy, significant composition in all the four blends was determined. When <i>Moringa</i> powder is blended with other four remarkable spices, its phytochemical characteristics and biological characteristics like antioxidant antimicrobial activity are enhanced to high side.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 2","pages":"161 - 168"},"PeriodicalIF":0.8,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139904164","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

A Robust Framework for fraud Detection in Banking using ML and NN 利用 ML 和 NN 检测银行业务欺诈的稳健框架

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-02-19 DOI: 10.1007/s40010-024-00871-1

Astha Vashistha, Anoop Kumar Tiwari, Priyanshi Singh, Paritosh Kumar Yadav, Sudhakar Pandey

{"title":"A Robust Framework for fraud Detection in Banking using ML and NN","authors":"Astha Vashistha, Anoop Kumar Tiwari, Priyanshi Singh, Paritosh Kumar Yadav, Sudhakar Pandey","doi":"10.1007/s40010-024-00871-1","DOIUrl":"10.1007/s40010-024-00871-1","url":null,"abstract":"<div><p>Banking fraud is a problem that is becoming more and more serious, along with considerable monetary losses, damage to the bank's brand, loss of client and customer confidence. Fraud identification and prevention are major challenges for many financial organizations, retail firms, and e-commerce companies. Fraud detection is used to both identify and stop fraudsters from obtaining goods or bugs illegally. In the same vein, this research will conduct a feasibility study to determine the best fraud detection strategy. We provide a list of the tried-and-true methods for spotting fraud. To avoid fraud detection, many techniques like Deep Neural Network, Support Vector Machine, Multilayer Perceptron, K-Nearest Neighbors, Random Forest, XG Boost, LGBM, and Decision Tree were used. The dataset was built from 20,000 entries on Kaggle, each having 114 attributes. Before using machine learning and neural network approaches, the dataset is balanced using the Synthetic Minority Over-Sampling Method. Following the analysis of the dataset using a number of methods, it was determined that Random Forest, Decision Tree, XG Boost, and LGBM all had 100% accuracy. This demonstrates that the model outperformed other models by balancing the dataset.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 2","pages":"201 - 212"},"PeriodicalIF":0.8,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139927174","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

Surface Roughness Influence on the Dynamic Performance of Rayleigh Step Bearing Lubricated with Couplestress Fluid 表面粗糙度对使用耦合应力流体润滑的瑞利阶梯轴承动态性能的影响

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-01-30 DOI: 10.1007/s40010-023-00869-1

N. B. Naduvinamani, Ashwini Angadi

{"title":"Surface Roughness Influence on the Dynamic Performance of Rayleigh Step Bearing Lubricated with Couplestress Fluid","authors":"N. B. Naduvinamani, Ashwini Angadi","doi":"10.1007/s40010-023-00869-1","DOIUrl":"10.1007/s40010-023-00869-1","url":null,"abstract":"<div><p>In the present paper, we have analyzed the surface roughness influence on the dynamic performance of Rayleigh step bearing by taking the squeezing action. The non-Newtonian lubricant in the film region considered is a couplestress fluid. A stochastic random variable with a non-zero mean, variance and skewness characterizes the roughness. The improved averaged Reynolds type equation is obtained using constitutive Stoke’s equations for couple stress fluid and stochastic surface roughness theory. For volume flow rate, steady-state characteristics and dynamic characteristics are derived in closed-form expression and are solved numerically by Simpson rule using Mathematica software. The non-Newtonian couplestress fluid enhances (diminishes) the steady load carrying capacity, the dynamic stiffness, and the dynamic damping coefficients, also a decrease (increase) in the volume flow rate is required for negatively (positively) skewed surface roughness in accordance with the Newtonian case. The relative percentage increase in bearing characteristics is studied. The results are considered with that of the smooth case.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 2","pages":"235 - 247"},"PeriodicalIF":0.8,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139644979","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

On the Existence Theorem of a Three-Step Newton-Type Method Under Weak L-Average 论弱 L 均值条件下牛顿三步法的存在定理

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-01-27 DOI: 10.1007/s40010-023-00857-5

J. P. Jaiswal

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A Study on Rough (mathcal {I})-Deferred Statistical Convergence in Gradual Normed Linear Spaces 关于渐变规范线性空间中粗糙 $$mathcal {I}$ -延迟统计收敛的研究

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-01-18 DOI: 10.1007/s40010-023-00867-3

Ömer Kişi, Chiranjib Choudhury

{"title":"A Study on Rough (mathcal {I})-Deferred Statistical Convergence in Gradual Normed Linear Spaces","authors":"Ömer Kişi, Chiranjib Choudhury","doi":"10.1007/s40010-023-00867-3","DOIUrl":"10.1007/s40010-023-00867-3","url":null,"abstract":"<div><p>In the present paper, we set forth with the new notion of rough <span>(mathcal {I})</span>-deferred statistical convergence of order <span>(alpha (0<alpha le 1))</span> in gradual normed linear spaces (GNLS). We prove some fundamental features and implication relations of this convergence method. Also, we put forward the notion of gradual rough <span>(mathcal {I})</span>-deferred statistical limit set of order <span>(alpha )</span> and prove some of its properties such as closedness and convexity. We prove that the gradual rough <span>(mathcal {I})</span>-deferred statistical limit set also plays a crucial role in the gradually <span>(mathcal {I})</span>-deferred statistical boundedness of order <span>(alpha )</span> of a sequence in a GNLS. We end up proving a necessary and sufficient condition for the rough <span>(mathcal {I})</span>-deferred statistical convergence of order <span>(alpha (0<alpha le 1))</span> of a sequence in GNLS. <b>Significance of the work in a broad context:</b> Summability theory and convergence of sequences have many applications in mathematical analysis. The study of the convergence of sequences in GNLS has made little progress and is still in its early stages. In this paper, we introduce rough <span>(mathcal {I}-)</span>deferred statistical convergence of sequences in GNLS which provides a new direction to the researchers.</p></div>","PeriodicalId":744,"journal":{"name":"Proceedings of the National Academy of Sciences, India Section A: Physical Sciences","volume":"94 1","pages":"113 - 126"},"PeriodicalIF":0.8,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40010-023-00867-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139506858","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}

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Selenium: A Wonder Element in Life and for Life 硒：生命中的神奇元素

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2024-01-10 DOI: 10.1007/s40010-023-00858-4

Vimal K. Jain, K. Indira Priyadarsini

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General De Novo Programming Problem Under Type-2 Fuzzy Environment 第 2 类模糊环境下的一般新编程问题

IF 0.8 4区综合性期刊

Proceedings of the National Academy of Sciences, India Section A: Physical Sciences Pub Date : 2023-12-23 DOI: 10.1007/s40010-023-00863-7

Susanta Banik, Debasish Bhattacharya

引用次数: 0