Iranian Journal of Science and Technology, Transactions A: Science最新文献_第5页

Dielectric, Ferroelectric, and Energy Storage Properties of Solvent Casted P(VDF-TrFE) Film 溶剂浇铸 P（VDF-TrFE）薄膜的介电、铁电和储能特性

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-24 DOI: 10.1007/s40995-024-01711-y

S. Parthasarathy, S. Behera, Srikanta Moharana

引用次数: 0

Regarding a Novel Subclass of Harmonic Multivalent Functions Defined by Higher-Order Differential Inequality 关于由高阶微分不等式定义的谐波多价函数的一个新子类

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-24 DOI: 10.1007/s40995-024-01697-7

Serkan Çakmak

引用次数: 0

Analysis of Bulk Arrival Recurrent Queue with Active and Passive Breakdowns 带主动和被动故障的批量到达循环队列分析

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-24 DOI: 10.1007/s40995-024-01673-1

Shweta Upadhyaya, Radhika Agarwal, Divya Agarwal

{"title":"Analysis of Bulk Arrival Recurrent Queue with Active and Passive Breakdowns","authors":"Shweta Upadhyaya, Radhika Agarwal, Divya Agarwal","doi":"10.1007/s40995-024-01673-1","DOIUrl":"10.1007/s40995-024-01673-1","url":null,"abstract":"<div><p>This study investigates the <span>(M^X/G/1)</span> queue with retrials and an optional service facility for the one who opts for it. Here the service provider may follow Bernoulli vacation schedule. If the server is occupied, the clients are forced to join the virtual orbit from where they retry for their primary essential service or secondary optional service . The service provider is subjected to either active breakdown when occupied or passive breakdown when unoccupied. Depending on their types of breakdown, they are subjected to either immediate or delayed repair, respectively. After each service, depending on the server’s choice, it may either go on a Bernoulli vacation or may serve the next client. Implementing the embedded Markov chain technique, the system’s ergodic condition is established. Also, the steady state solution for various queueing parameters is obtained using the generating functions defined for the queue length distribution. The consequences of different parameters on the performance measures have been illustrated numerically. Further to develop a low cost model, formulation of the cost function is done and the impact of sensitive parameters on the overall cost of the system is studied. The optimization of the cost function using a soft computing technique, Artificial Bee Colony is also discussed which makes the system cost effective.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1473 - 1487"},"PeriodicalIF":1.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524370","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

Systematic Affinity of Verbena supina (Verbenaceae), a New Species to the Flora of Iran, Along with Infrageneric Classifications of the Genus 伊朗植物新种 Verbena supina（马鞭草科）的系统亲缘关系以及该属的非属分类

IF 1.4 4区综合性期刊

Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-09-24 DOI: 10.1007/s40995-024-01714-9

Atena Eslami-Farouji, Ahmad Reza Khosravi

{"title":"Systematic Affinity of Verbena supina (Verbenaceae), a New Species to the Flora of Iran, Along with Infrageneric Classifications of the Genus","authors":"Atena Eslami-Farouji, Ahmad Reza Khosravi","doi":"10.1007/s40995-024-01714-9","DOIUrl":"10.1007/s40995-024-01714-9","url":null,"abstract":"<div><p>Recent evaluation of herbarium specimens in central regions of Fars province led to the introduction of a plant new to the Iranian flora. This novel specimen is introduced as the third distinct species of the genus <i>Verbena</i> named <i>V. supina</i> (Verbenaceae), and a detailed morphological description and illustration of Iranian specimen are provided herein. The genetic affinity of <i>V. supina</i> and allied species were also determined for the first time using nuclear ribosomal DNA genetic marker, and the validity of traditional infrageneric sub-classifications were critically examined. An identification key together with ecological information and the distribution area of this plant within the country, are also discussed. Based on this study, studied <i>Verbena</i> species were grouped into two main clades with distinct geographical dispersion, and the old-world <i>V. supina</i>, is found to be genetically similar to <i>V. officinalis</i>. Morphologically, <i>V. supina</i> and <i>V. officinalis</i> are distinct in terms of seed micro-structure, life form, leaf margin and inflorescence trichome type. The credibility and the monophyly of traditional infrageneric sub-classifications were not validated due to homoplastic characters. Likewise, derived traits such as autapomorphic and synapomorphic were critically determined.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"48 6","pages":"1383 - 1395"},"PeriodicalIF":1.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524371","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

Unveiling Mechanism of Coal Miners’ Dust Prevention Behaviour Under Force Field 力场作用下煤矿工人防尘行为的揭示机理

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 基于稳健性和经验验证的有限总体均值分位数回归的增强比率型估计

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

Poly (vinyl alcohol)/montmorillonite clay/poly (1-vinylpyrrolidone-co-vinyl acetate) composite films for the effective removal of methylene blue 有效去除亚甲基蓝的聚乙烯醇/蒙脱土/聚（1-乙烯基吡咯烷酮-醋酸乙烯酯）复合膜

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/s40995-024-01718-5

Tilak Gasti, Shruti Dixit, Ravindra B. Chougale, Saraswati P. Masti

{"title":"Poly (vinyl alcohol)/montmorillonite clay/poly (1-vinylpyrrolidone-co-vinyl acetate) composite films for the effective removal of methylene blue","authors":"Tilak Gasti, Shruti Dixit, Ravindra B. Chougale, Saraswati P. Masti","doi":"10.1007/s40995-024-01718-5","DOIUrl":"10.1007/s40995-024-01718-5","url":null,"abstract":"<div><p>In this work, we employed the solvent casting process to produce novel composite films using poly (vinyl alcohol) (PVA), Na-montmorillonite (MMT), and poly (1-vinylpyrrolidone-co-vinyl acetate) (PVP-co-VAc). The objective of this work is to examine the effects of PVP-co-VAc concentration on the mechanical, optical, and surface wettability properties of PVA/MMT films. The developed films exhibited secondary interactions between the film components, as confirmed by the FT-IR analysis. The incorporation of PVP-co-VAc significantly enhanced film transparency and elasticity while reducing the tensile strength by 44.54%. The hydrophobic surface of the composite film has been converted to a hydrophilic one and has shown excellent swelling efficiency of 102.08% by the effect of PVP-co-VAc. Additionally, the produced composite film demonstrated outstanding methylene blue adsorption capacity (97.87%) within 40 min at ambient temperature. These results suggest that fabricated composite films will become a promising material for removing industrially toxic dyes from aqueous solutions.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"519 - 529"},"PeriodicalIF":1.4,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583670","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