发布求助
文献互助 智能选刊 最新文献

Iranian Journal of Science and Technology, Transactions A: Science最新文献

筛选
英文 中文
Radiation Shielding and Spectroscopic Investigations of Newly Produced Co and Ni Based Super Alloys 新型Co和Ni基超级合金的辐射屏蔽和光谱研究
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-12-03 DOI: 10.1007/s40995-024-01761-2
Murat Aygun, Zeynep Aygun, Ercan Ercan
{"title":"Radiation Shielding and Spectroscopic Investigations of Newly Produced Co and Ni Based Super Alloys","authors":"Murat Aygun,&nbsp;Zeynep Aygun,&nbsp;Ercan Ercan","doi":"10.1007/s40995-024-01761-2","DOIUrl":"10.1007/s40995-024-01761-2","url":null,"abstract":"<div><p>With the rise in applications involving high-radiation exposure, it is imperative to implement measures to minimise the adverse effects of radiation. There is a great need for material development that can be used at high temperatures, especially in the nuclear industry. Superalloys have properties that can serve this purpose. In order to achieve this objective, new Co-based and Ni-based super alloys were produced in the study. Ni, Fe, Mo, Cr, Nb, Ti, Al, Co, Ta and W were selected for developing Co-based alloys, and Ni, Fe, Cr, Nb, Ti, Al, Co and B were selected for Ni-based alloy. The goal of the study is to obtain new materials which have better shielding performances with superior properties. In this regard, the radiation protection parameters; linear attenuation coefficients, mass attenuation coefficients, effective atomic number, half-value layer, mean free path, effective conductivity, effective electron number, exposure and energy absorption buildup factors, atomic and electron cross sections, and fast neutron attenuation cross-sections of the alloys were performed by Phy-X/PSD code. Further, EPR, XRD and EDS-SEM spectroscopic techniques were used and the results were appraised within this context. It can be noted that the content of W, Ta and Mo, due to the features of high density and high atomic number, improves the radiation attenuation efficiency of the alloys. It is also seen that the fast neutron attenuation ability is affected by Ni, Ta, Mn and Mo contents. It was concluded that the newly fabricated super alloys can be evaluated as good radiation shields in high temperature applications such as nuclear reactors.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"559 - 573"},"PeriodicalIF":1.4,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583390","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
Correction to: Acantholimon brevispicatum (Plumbaginaceae) a New Species from Southeastern Iran Based on Morphological and Molecular Data 基于形态和分子资料的伊朗东南部一新种——短葶棘花（Plumbaginaceae）的更正
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-27 DOI: 10.1007/s40995-024-01746-1
Hossein Bibak, Shahrokh Kazempour-Osaloo, Mostafa Assadi
{"title":"Correction to: Acantholimon brevispicatum (Plumbaginaceae) a New Species from Southeastern Iran Based on Morphological and Molecular Data","authors":"Hossein Bibak,&nbsp;Shahrokh Kazempour-Osaloo,&nbsp;Mostafa Assadi","doi":"10.1007/s40995-024-01746-1","DOIUrl":"10.1007/s40995-024-01746-1","url":null,"abstract":"","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"575 - 575"},"PeriodicalIF":1.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583618","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 Complexity: A Discrete-Time Prey–Predator Model with Immigration Effects 揭示复杂性：一个具有移民效应的离散时间猎物-捕食者模型
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-19 DOI: 10.1007/s40995-024-01742-5
Halima Benali, Karima Mokni, Hajar Mouhsine, Mohamed Ch-Chaoui
{"title":"Unveiling Complexity: A Discrete-Time Prey–Predator Model with Immigration Effects","authors":"Halima Benali,&nbsp;Karima Mokni,&nbsp;Hajar Mouhsine,&nbsp;Mohamed Ch-Chaoui","doi":"10.1007/s40995-024-01742-5","DOIUrl":"10.1007/s40995-024-01742-5","url":null,"abstract":"<div><p>This paper explores the qualitative dynamics of a discrete-time prey–predator model incorporating immigration effects. In this model, immigration is assumed to affect only a fraction of both prey and predator populations. We systematically analyze the equilibrium points of the system and assess their stability. Through the application of bifurcation theory, we demonstrate that the system undergoes a Neimark–Sacker bifurcation, leading to complex dynamical behavior. To address the emergence of chaos, a hybrid control strategy is implemented to stabilize the system. Numerical simulations reveal that immigration can intensify the system’s complex dynamics, suggesting that even small levels of immigration can have a profound impact on the behavior of prey–predator interactions.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"449 - 462"},"PeriodicalIF":1.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583570","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
Biological Efficacy of 40 Noncovalent SARS-CoV-2 Main Protease Inhibitors: A Computational Study 40种非共价SARS-CoV-2主要蛋白酶抑制剂的生物学效果：计算研究
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-14 DOI: 10.1007/s40995-024-01749-y
Sravani Joshi, Ruby Srivastava
{"title":"Biological Efficacy of 40 Noncovalent SARS-CoV-2 Main Protease Inhibitors: A Computational Study","authors":"Sravani Joshi,&nbsp;Ruby Srivastava","doi":"10.1007/s40995-024-01749-y","DOIUrl":"10.1007/s40995-024-01749-y","url":null,"abstract":"<div><p>The COVID-19 crisis caused by Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has prompted the world to accelerate many drugs and vaccines for emergency use. Several inhibitors with the potent enzymatic inhibition and cellular antiviral activity are reported to target the main protease (M<sup>pro</sup>) of SARS-CoV-2. We selected ML188 and its 39 analogs to study the physicochemical properties and biological efficacy of these inhibitors. Results showed that these inhibitors are highly stable and chemically active. With good bioavailability, none of the inhibitors showed poor intestinal absorption. Few toxicity related issues, high Gastrointestinal (GI) absorption and no Blood-brain barrier (BBB) activity is seen in most of the inhibitors. The involvement of these inhibitors with multitargets indicated their potential usage for drug repurposing.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"307 - 318"},"PeriodicalIF":1.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583556","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
Bicomplex Version of Matrix Transformations Between (c_{0}^{k}left( mathbb{B}mathbb{C}right)) and (c^{k}left( mathbb{B}mathbb{C} right)) by Using the Hyperbolic-Valued Norm 利用双曲值范数求解(c_{0}^{k}left( mathbb{B}mathbb{C}right))与(c^{k}left( mathbb{B}mathbb{C} right))之间的矩阵变换的双复形式
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-09 DOI: 10.1007/s40995-024-01737-2
Birsen Sağır, Nihan Güngör, Cenap Duyar
{"title":"Bicomplex Version of Matrix Transformations Between (c_{0}^{k}left( mathbb{B}mathbb{C}right)) and (c^{k}left( mathbb{B}mathbb{C} right)) by Using the Hyperbolic-Valued Norm","authors":"Birsen Sağır,&nbsp;Nihan Güngör,&nbsp;Cenap Duyar","doi":"10.1007/s40995-024-01737-2","DOIUrl":"10.1007/s40995-024-01737-2","url":null,"abstract":"<div><p>This paper presents the characterizations of bicomplex matrix transformations between <span>(c_{0}^{k}left( mathbb{B}mathbb{C}right))</span> and <span>(c^{k}left( mathbb{B}mathbb{C}right))</span> generalizing several conclusions from complex version of these matrices. Moreover, we define and demonstrate their bicomplex counterparts utilizing the Silverman-Toeplitz and Kojima-Schur theorems.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"439 - 447"},"PeriodicalIF":1.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583448","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
Investigating of Intraspecific Diversity of Potamogeton nodosus Poir. in Iran Using Morphological Traits and Molecular Markers 马铃薯种内多样性的研究。利用形态性状和分子标记
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-09 DOI: 10.1007/s40995-024-01733-6
Neda Aghaei, Saeed Afsharzadeh, Shabnam Abbasi
{"title":"Investigating of Intraspecific Diversity of Potamogeton nodosus Poir. in Iran Using Morphological Traits and Molecular Markers","authors":"Neda Aghaei,&nbsp;Saeed Afsharzadeh,&nbsp;Shabnam Abbasi","doi":"10.1007/s40995-024-01733-6","DOIUrl":"10.1007/s40995-024-01733-6","url":null,"abstract":"<div><p>The genus <i>Potamogeton</i> L. is an aquatic plant belonging to the Potamogetonaceae. Eleven species have been reported for this genus in Iran. This genus is located in the most of the water habitats of the country and has importance in various fields such as the purification of polluted water, absorption of heavy metals, and medicinal uses. One of the important species of this genus is <i>Potamogeton nodosus</i> Poir. which shows great morphological diversity in different aquatic habitats. In this study, we first studied the quantitative and qualitative morphological characters among different populations of this species. Since the morphological marker may be affected by the environment, we also used molecular markers. For molecular study, six pairs of SRAP primers and four ISSR primers were used. The results of the combination of two markers showed the intraspecific relationships of different populations of <i>P. nodosus</i> better than each of the two markers alone. According to the results, the populations were divided into four geographical groups: north, center, southwest, and southeast. The populations of the southeast region showed more genetic differentiation than other regions. Molecular variance analysis showed intra-population variations slightly higher than inter-population variations. Regarding to relatively high genetic diversity of populations of this species, conservational strategies for aquatic ecosystems of Iran is needed.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"297 - 306"},"PeriodicalIF":1.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583445","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
Iterative Stochastic Restricted (r-k) Class Estimator in Generalized Linear Models: Application on Logistic Regression 广义线性模型中的迭代随机受限(r-k)类估计量：在逻辑回归中的应用
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-06 DOI: 10.1007/s40995-024-01724-7
Atif Abbasi, M. Revan Özkale
{"title":"Iterative Stochastic Restricted (r-k) Class Estimator in Generalized Linear Models: Application on Logistic Regression","authors":"Atif Abbasi,&nbsp;M. Revan Özkale","doi":"10.1007/s40995-024-01724-7","DOIUrl":"10.1007/s40995-024-01724-7","url":null,"abstract":"<div><p>The purpose of this paper is to introduce the stochastic restricted <span>(r-k)</span> class estimator and the stochastic restricted principal components regression estimator in case of multicollinearity. The matrix mean square error (MSE) comparisons of these new proposed estimators with the maximum likelihood estimator are given. In case the response variable has a binomial distribution, the performance evaluation of new estimators is examined with a numerical example and simulation studies such that the scalar MSE in the numerical example and the estimated MSE and the prediction MSE in the simulation study are used as the performance evaluation criteria. The results show that when the appropriate tuning parameter value is used, the stochastic restricted <span>(r-k)</span> class estimator gives better results than the maximum likelihood, mixed and stochastic restricted principal components regression estimators in all evaluation criteria regardless of the degree of multicollinearity while it is superior to the stochastic restricted ridge estimator according to the estimated MSE criterion at all degree of multicollinearity and according to the prediction MSE criterion when the degree of multicollinearity is 0.80 and 0.90.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"357 - 367"},"PeriodicalIF":1.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583452","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
Existence of Solutions for Riemann-Liouville Fractional Dirichlet Boundary Value Problem Riemann-Liouville分数阶Dirichlet边值问题解的存在性
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-05 DOI: 10.1007/s40995-024-01696-8
Zhiyu Li
{"title":"Existence of Solutions for Riemann-Liouville Fractional Dirichlet Boundary Value Problem","authors":"Zhiyu Li","doi":"10.1007/s40995-024-01696-8","DOIUrl":"10.1007/s40995-024-01696-8","url":null,"abstract":"<div><p>In this paper, existence theorems of solutions for the Riemann-Liouville fractional Dirichlet</p><p>boundary value problem <span>(begin{aligned} left{ begin{aligned} {D_{0+}^{alpha }}x(t)=fleft( t,x(t),{D_{0+}^{alpha -1}}x(t)right) , tin (0,1), x(0)=0, x(1)=B, end{aligned}right. end{aligned})</span>are obtained, where <span>(Bin {mathbb {R}})</span>, <span>({D_{0+}^{alpha }}x(t))</span> is the Riemann-Liouville fractional derivative, <span>({alpha }in (1,2])</span> is a real number, and <span>(fin Cleft( [0,1]times {mathbb {R}}^{2}, {mathbb {R}}right))</span>. We do not impose growth restrictions on nonlinear term <i>f</i> as many authors do but merely require that <i>f</i> satisfies sign conditions at the origin. Our analysis is based on the nonlinear alternative of Leray-Schauder. Finally, we provide an example to verify our main results.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 1","pages":"161 - 167"},"PeriodicalIF":1.4,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108321","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
An Improved Poisson EWMA Control Chart for Monitoring Nonconformities Per Unit 一种改进的泊松EWMA控制图，用于监控不合格件
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-04 DOI: 10.1007/s40995-024-01732-7
Waqar Hafeez, Jianguo Du, Zameer Abbas, Hafiz Zafar Nazir
{"title":"An Improved Poisson EWMA Control Chart for Monitoring Nonconformities Per Unit","authors":"Waqar Hafeez,&nbsp;Jianguo Du,&nbsp;Zameer Abbas,&nbsp;Hafiz Zafar Nazir","doi":"10.1007/s40995-024-01732-7","DOIUrl":"10.1007/s40995-024-01732-7","url":null,"abstract":"<div><p>Poisson control charts are most frequently used to track the number of nonconformities per unit in industrial processes during the inspection. As the quality characteristic under examination is based on a nominal scale rather than a quantitative or measured scale, these charting structures are known as attribute control charts. To detect small changes quickly, a Poisson extended exponentially weighted moving average (PEEWMA) control chart is developed in this study and its performance in zero-state and steady-state conditions has been examined. Run-length (RL) profiles, such as the average RL, the standard deviation of RL, and several percentile points of the RL distribution, have been evaluated using Monte Carlo simulation. The RL profiles of the proposed PEEWMA chart have been compared with existing methods. The comparison shows that the suggested PEEWMA chart outperforms its competitors. The application of the proposed design from an artificial dataset has also been included.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"427 - 438"},"PeriodicalIF":1.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583439","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
Higher Order Stable Numerical Algorithm for the Variable Order Time-Fractional Sub-diffusion Equation 变阶时间分数次扩散方程的高阶稳定数值算法
IF 1.4 4区 综合性期刊
Iranian Journal of Science and Technology, Transactions A: Science Pub Date : 2024-11-04 DOI: 10.1007/s40995-024-01726-5
Priyanka Rajput, Nikhil Srivastava, Vineet Kumar Singh
{"title":"Higher Order Stable Numerical Algorithm for the Variable Order Time-Fractional Sub-diffusion Equation","authors":"Priyanka Rajput,&nbsp;Nikhil Srivastava,&nbsp;Vineet Kumar Singh","doi":"10.1007/s40995-024-01726-5","DOIUrl":"10.1007/s40995-024-01726-5","url":null,"abstract":"<div><p>In the present work, we proposed a numerical scheme for solving the Variable order time fractional sub-diffusion equation (VOTFSDE) by finite difference method. The variable order Caputo derivative is approximated by the L-123 approximation in time direction. The numerical schemes unconditional stability is theoretically investigated. The three test problems are used to execute the scheme, and the numerical results show a high level of accuracy and higher order of convergence. To show the efficiency and accuracy of our proposed scheme, a comparison of the numerical results with those from an earlier existing scheme is also provided.</p></div>","PeriodicalId":600,"journal":{"name":"Iranian Journal of Science and Technology, Transactions A: Science","volume":"49 2","pages":"369 - 381"},"PeriodicalIF":1.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583397","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信