Iranian Journal of Science and Technology, Transactions A: Science最新文献_第3页

Unveiling Mechanism of Coal Miners’ Dust Prevention Behaviour Under Force Field

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-23 DOI: 10.1007/s40995-024-01707-8

Shulei Shi, Chang-Fei Yu, Shiju Wang

{"title":"Unveiling Mechanism of Coal Miners’ Dust Prevention Behaviour Under Force Field","authors":"Shulei Shi, Chang-Fei Yu, Shiju Wang","doi":"10.1007/s40995-024-01707-8","DOIUrl":"10.1007/s40995-024-01707-8","url":null,"abstract":"<div><p>As the direct subject of dust hazards, it is crucial for coal miners to actively participate in dust prevention to reduce harm. With the use of scale surveys and structural equation modelling, this study investigated the driving mechanism of dust prevention behaviour tendency among coal miners under the influence of internal force field, situational force field, and group dynamics from the perspective of force field. It was found that coal miners with a strong tendency towards dust prevention behaviour under the influence of internal force field were more likely to form dust prevention behaviour under the moderating effect of situational force field and group dynamics. This study provided theoretical and empirical references for coal miners, coal mining enterprises, and governments to effectively prevent and control occupational hazards caused by dust. It had important decision-making reference value for improving the dust control system and mechanism, guiding innovative changes in governance models, improving governance efficiency, improving the basic guarantee of cooperative governance, and promoting the improvement of miners' safety and health levels.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"49 - 64"},"PeriodicalIF":1.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109267","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

Convergence Analysis of the Collocation Method for Solving Two-dimensional Fractional Volterra Integro-differential Equations 解决二维分数 Volterra 积分微分方程的拼合法收敛性分析

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-21 DOI: 10.1007/s40995-024-01712-x

S. Kazemi, A. Tari

引用次数: 0

A Theoretical Approach to the Investigation of Electrostatic Plasma Waves in Laser Pulse Interaction with Hypothetical Nonuniform Quantum Electron–Positron Magnetoplasma 研究激光脉冲与假想非均匀量子电子-正电子磁等离子体相互作用中的静电等离子体波的理论方法

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-21 DOI: 10.1007/s40995-024-01702-z

Maryam Asgharzadeh, Hossein Zahed

{"title":"A Theoretical Approach to the Investigation of Electrostatic Plasma Waves in Laser Pulse Interaction with Hypothetical Nonuniform Quantum Electron–Positron Magnetoplasma","authors":"Maryam Asgharzadeh, Hossein Zahed","doi":"10.1007/s40995-024-01702-z","DOIUrl":"10.1007/s40995-024-01702-z","url":null,"abstract":"<div><p>Electrostatic plasma waves (EPWs) in a nonuniform quantum electron–positron magnetoplasma in the presence of ponderomotive force of laser have been studied using low-frequency and WKB approximations. Effects of the initial quantities and their transverse gradients and the effect of laser ponderomotive force on the plasma waves have been investigated. We indicate that the ponderomotive force, as regards its direction, has a significant effect on the plasma waves, and their instability rate in the parallel direction, so that, increasing the magnitude of this force increases the group and phase velocities of these waves and their instability rates. Also, the parallel plasma waves have been affected directly by amounts of initial number density and streaming velocity but, their dependence on the amount of external magnetic field is only, via the ponderomotive force. Our results indicate that in the quantum state, the additional correction terms in ponderomotive force can lead to a modification in the instability rate, and the plasma waves velocities. In the perpendicular direction, the transverse gradient of the external magnetic field was the only operant factor in the propagation of the EPWs, and it causes the waves become unstable. Also, their instabilities are affected by the magnetic field, number density, and their transverse gradients.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1645 - 1651"},"PeriodicalIF":1.4,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524495","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 Enhanced Ratio-Type Estimators Using Quantile Regression for Finite Population Mean under Robustness and Empirical Validation

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-21 DOI: 10.1007/s40995-024-01700-1

Muhammad Zohaib, Waqas Latif, Mubeen Alam

引用次数: 0

Estimation of Probability Density Function Under Judgment Post-Stratification Sampling Using Bayesian Estimation of Bandwidth 利用贝叶斯带宽估计法估计判断后分层抽样下的概率密度函数

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-21 DOI: 10.1007/s40995-024-01698-6

Ali Najafi Majidabadi, Nader Nematollahi

引用次数: 0

XRD Peak Profile and Inverse Pole Figure Analysis of Ceria (CeO2) Nanoparticles 氧化铈（CeO2）纳米颗粒的 XRD 峰谱和反极图分析

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01710-z

R. Vettumperumal, N. R. Dhineshbabu, Elumalai PV, Chan Choon Kit

{"title":"XRD Peak Profile and Inverse Pole Figure Analysis of Ceria (CeO2) Nanoparticles","authors":"R. Vettumperumal, N. R. Dhineshbabu, Elumalai PV, Chan Choon Kit","doi":"10.1007/s40995-024-01710-z","DOIUrl":"10.1007/s40995-024-01710-z","url":null,"abstract":"<div><p>The pursuit of identifying and enhancing a preferred grain texture has emerged as a viable approach to improve functional properties. X-ray and neutron diffraction techniques have proven to be invaluable tools for probing crystallographic textures. In this study, ceria (CeO2) nanoparticles were synthesized via the precipitation method, and their structural and morphological characteristics were investigated through X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analyses. The inconsistent behavior in the long-range two theta values of CeO<sub>2</sub> is elucidated from the crystallite size and strain plot. Hence, the XRD peak profile of the CeO<sub>2</sub> nanoparticles can be assessed through the Williamson – Hall (W-H), size strain plot (SSP), and Halder – Wagner (H-W) method. Among these, The Halder – Wagner method gives better structural parameter values and it confirms the existence of compressive strain in the CeO<sub>2</sub> lattice. Plane orientation, distribution, and position of Ce and O<sub>2</sub> atoms in the CeO<sub>2</sub> lattice are confirmed from the Rietveld refinement and texture analysis using GSAS – II. The regions of highest pole densities coincide with the (111) positions from the standard stereographic projection (001) which confirms the majority of particles in CeO<sub>2</sub> nanoparticles are aligned along the (001) plane.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1653 - 1661"},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524494","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 Class of Fractional Order Nonlinear Volterra–Fredholm Integro-Differential IVPs and BVPs: Qualitative Analysis and Numerical Investigation

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01713-w

Bapan Ali Miah, Mausumi Sen, R. Murugan, Damini Gupta

{"title":"A Class of Fractional Order Nonlinear Volterra–Fredholm Integro-Differential IVPs and BVPs: Qualitative Analysis and Numerical Investigation","authors":"Bapan Ali Miah, Mausumi Sen, R. Murugan, Damini Gupta","doi":"10.1007/s40995-024-01713-w","DOIUrl":"10.1007/s40995-024-01713-w","url":null,"abstract":"<div><p>In this work, we have examined a class of fractionally ordered Volterra–Fredholm integro-differential equations (VFIDE), where the fractional derivative has been interpreted in the Riemann–Liouville sense. We have focused separate attention on the boundary value problems (BVPs) and initial value problems (IVPs). Each of these problems has been reduced to a fractional order Volterra–Fredholm integral equation of the second kind using Leibnitz’s formula to simplify the analysis. We have derived sufficient conditions for the existence and uniqueness of the solutions to the IVPs and BVPs. We have used Banach’s fixed point and Schaefer’s fixed point theorems to prove the existence and uniqueness results for the considered problems. An operator-based approach using Laplace discrete modified Adomian decomposition methods based on Bernstein polynomials has been considered to approximate their solutions. The convergence and error analysis of the proposed method has also been investigated. We have compared the method with the Homotopy perturbation method for the considered problems. Some numerical examples have been provided to validate the theoretical results.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"225 - 241"},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108954","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 Fermat-Type Binomial Equations Involving Differential Difference Form in Higher Dimensional Complex Plane 论涉及高维复平面差分形式的费马型二项式方程

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-20 DOI: 10.1007/s40995-024-01716-7

Goutam Haldar, Abhijit Banerjee

引用次数: 0

Existence of Positive Solutions of a Fractional Dynamic Equation Involving Integral Boundary Conditions on Time Scales 涉及时间尺度上积分边界条件的分数动态方程正解的存在性

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-08-24 DOI: 10.1007/s40995-024-01691-z

Bikash Gogoi, Utpal Kumar Saha, Bipan Hazarika, Ravi P. Agarwal

引用次数: 0

Constrained Bayesian Methods for Union-Intersection and Intersection-Union Hypotheses Testing Problems 联合-交叉和交叉-联合假设检验问题的约束贝叶斯方法