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Numerical computation of Brownian motion and thermophoresis effects on rotational micropolar nanomaterials with activation energy

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Propulsion and Power Research 2023年第3期12卷 397-409页

作者： Hassan Waqas Shan ali Khan bagh ali Dong Liu Taseer Muhammad Enran Hou School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China Department of Mathematics Government College University FaisalabadLayyah Campus 31200Pakistan Faculty of Computer Science and Information Technology Superior UniversityLahore 54000Pakistan Department of Mathematics College of SciencesKing Khalid UniversityAbha 61413Saudi Arabia College of Mathematics Huaibei Normal UniversityHuaibei 235000China

The current article investigates the numerical study of the micropolar nanofluid flow through a 3D rotating *** communication may manipulate for the aim such as the delivery of the drug,cooling of electronic chips,nanoscience and the fields of *** impact of heat source/sink is *** motion and thermophoresis aspects are *** rotating sheet with the impacts of Darcy-Forchheimer law is also ***,the influence of activation energy is analyzed in the current *** numerical analysis is simplified with the help of befitted resemblance *** succor of the shooting algorithm with built-in solver bvp4c MATLAB software is used for the numerical solution of nonlinear transformed *** consequences of different physical factors on the physical engineering quantities and the subjective fields were examined and *** to outcomes,it can be analyzed that the flow profile declined with the rotational *** is observed that angular velocity diminishes via a larger porosity ***,the temperature gradient is declined via a larger magnitude of the Prandtl *** heat transfer is enhanced in the occurrence of Brownian *** activations energy parameter causes an increment in the volumetric concentration ***,the local Nusselt number is reduced via a greater estimation of the porosity parameter.

关键词： Micropolar nanofluid flow Darcy-Forchheimer law Heat source/sink Activation energy Bvp4c

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Numerical study for bio-convection effects on MHD nano-fluid flow past a porous and extending wedge

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Propulsion and Power Research 2023年第4期12卷 584-594页

作者： bagh ali Muhammad Ilyas Imran Siddique Huizhu Yang Muhammad Kamran Ashraf Sohaib Abdal School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China Department of Mathematics National College of Business Administration&EconomicsLahore 54660Pakistan Department of Mathematics University of Management and TechnologyLahore 54770Pakistan School of Mathematics Northwest UniversityXi’an 710127China

We explored the insinuations of bio-convection and thermal radiation on nanofluid transportation across stretching permeable wedge with magnetic *** similarity transformation variables are utilized to achieve ordinary differential *** order to tackle the non-linearity of these equations,numerical procedure based on shooting technique and Range Kutta method are harnessed on MATLAB *** and devour is carried out to evaluate the influence of controlling limitations on temperature,velocity,concentration of nanofluids and micro-organisms *** growing strength of thermophoresis and Brownian motion enhance the fluid *** profile volume fraction show decline against higher values of parameters which are Lewis number,unsteadiness and Brownian motion but opposite trend noted against higher value of Williamson and thermophoresis *** skin friction values rise with the growing values of parameter of wedge angle for the moving *** motile organism profile exhibits decrease against growing strength of Peclet number,bioconvection Lewis number,temperature difference and unsteady parameters while opposite behavior has been noted against wedge angle parameter.

关键词： MHD Nanofluid Bioconvection Porous stretching wedge Range Kutta method

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Fault depth estimation using support vector classifier and features selection

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Applied Geophysics 2013年第1期10卷 88-96,119页

作者： Mohammad Ehsan Hekmatian Vahid E. Ardestani Mohammad ali Riahi Ayyub Memar Koucheh bagh Jalal Amini Faculty of Basic Sciences of Science and Research Branch Islamic Azad University Nuclear Fuel Cycle Research School of Nuclear Science & Technology Research Institute (NSTRI) Institute of Geophysics University of Tehran Faculty of Engineering University of Tehran

Depth estimation of subsurface faults is one of the problems in gravity interpretation. We tried using the support vector classifier （SVC） method in the estimation. Using forward and nonlinear inverse techniques, detecting the depth of subsurface faults with related error is possible but it is necessary to have an initial guess for the depth and this initial guess usually comes from non-gravity data. We introduce SVC in this paper as one of the tools for estimating the depth of subsurface faults using gravity data. We can suppose that each subsurface fault depth is a class and that SVC is a classification algorithm. To better use the SVC algorithm, we select proper depth estimation features using a proper features selection （FS） algorithm. In this research, we produce a training set consisting of synthetic gravity profiles created by subsurface faults at different depths to train the SVC code to estimate the depth of real subsurface faults. Then we test our trained SVC code by a testing set consisting of other synthetic gravity profiles created by subsurface faults at different depths. We also tested our trained SVC code using real data.

关键词： depth estimation subsurface fault support vector classifier feature featuresselection

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Mechanical and magneto-electronic properties of europium lanthanide-based cubic perovskites EuYO_(3)(Y=Cr, Mn, Fe): An ab initio study

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Journal of Rare Earths 2024年第3期42卷 562-569,I0005页

作者： Hayat Ullah Azra Sarwar Sajad ali Rabah Khenata Abdelmadjid Bouhemadou Saad Bin-Omran Department of Physics Women University of Azad Jammu&Kashmir Bagh 10250Pakistan Department of Physics Abdul Wali Khan UniversityMardan23200KPPakistan LPQ3M Laboratory Institute of Science and TechnologyUniversity of Mascara29000MascaraAlgeria Laboratory for Developing New Materials and Their Characterization Farhat Abbas University Setif l19000SetifAlgeria Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia

Computational calculations using density functional theory(DFT) were performed for the first time using the full potential linearized augmented plane wave plus local orbital method(FP-LAPW + LO) to determine the structural, elastic, electronic and magnetic properties of europium-based cubic perovskites EuYO_(3)(Y=Cr, Mn, Fe). The exchange correlation potentials of GGA along with some analytical methods were adopted for the computation of structural and elastic properties. Moreover, the GGA + U formalism was also added for obtaining more precise electronic and magnetic properties, particularly to address the Eu-4f and Y-3d orientations in the spin-polarized double cell symmetry. The observed lattice parameters of these compounds are consistent with experiment. The observed bulk moduli predict that EuCrO_(3) is harder and less compressible than EuMnO_(3) and EuFeO_(3). The calculated tolerance factors of these compounds are within the cubic symmetry range. Our computed critical radius of EuCrO_(3) shows that EuCrO_(3) has a larger migration energy. Based on their elastic properties, these compounds are ductile in nature. We also computed the thermal properties of these compounds. The band structures and density of states show that these compounds are metallic in character. The lowest ground state energy and magnetic moments of these compounds expose their ferromagnetic nature. The metallic nature and strong ferromagnetism of these compounds make them promising applicants for application in spintronic.

关键词： Perovskites GGA+U Elastic constants Band structure Magnetic moments Rare earths

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古兰经视域下巴基斯坦的伊斯兰园林研究

古兰经视域下巴基斯坦的伊斯兰园林研究

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作者： Arshad ali 北京林业大学

学位级别：硕士

波斯花园通常被认为是伊斯兰花园概念的主要灵感来源,它影响了其他花园形式,例如莫卧儿花园。本着伊斯兰精神,伊斯兰花园反映了人间天堂。随着公元七世纪伊斯兰教的到来,穆斯林艺术家和建筑师的信仰发生了变化,他们开始关注装饰和花卉图... 详细信息

波斯花园通常被认为是伊斯兰花园概念的主要灵感来源,它影响了其他花园形式,例如莫卧儿花园。本着伊斯兰精神,伊斯兰花园反映了人间天堂。随着公元七世纪伊斯兰教的到来,穆斯林艺术家和建筑师的信仰发生了变化,他们开始关注装饰和花卉图案,而不是人类或动物形象。特别是莫卧儿皇帝,以及一般的穆斯林皇帝,开发了独特的象征性花园。例如,在印度、巴基斯坦、克什米尔和阿富汗等东南亚国家设计了几个重要的伊斯兰花园;伊朗;西亚的土耳其;以及欧洲的格拉纳达和塞维利亚。《古兰经》启发了伊斯兰花园。该研究旨在了解巴基斯坦伊斯兰花园的物理布局和在这些花园中发现的古兰经描述,并研究伊斯兰花园的历史以及它们对游客的吸引力。本研究是定量和描述性的。使用现场访问和调查问卷来收集研究数据。通过对文学和《古兰经》的深入研究,研究了《古兰经》对这些花园的影响。《古兰经》启发了伊斯兰花园。宗教在伊斯兰花园建设中的作用至关重要。莫卧儿花园的组成部分反映了古兰经天堂意象的独特标志。在伊斯兰花园中可以看到轴向伸长、对称和中央水景的一致设计。经典的花园格局是察哈尔巴格,一个四部分的花园,由穿过花园中间的轴向路线分为四个部分。拉合尔市在印度莫卧儿王朝统治期间被称为“花园之城”次大陆。拉合尔拥有2000多年的历史,影响了世界许多地区的建筑史和建筑。拉合尔的莫卧儿伊斯兰花园以其众多的天堂花园而闻名。拉合尔被称为“花园之城”。Shalamar花园距离Chahar-bagh仅两步之遥。拉合尔堡是拉合尔的一座堡垒。拉合尔堡拥有多达三十座不同的建筑物和结构,并分为其他四边形。这些四合院是阿克巴四合院、贾汉吉尔四合院、沙贾汗四合院、Moti Masjid四合院、Paien bagh四合院和Shah Burj四合院。贾汉吉尔陵墓位于拉合尔市西北部的郊区沙赫达拉(Shah Dara)。贾汉吉尔墓的建筑最简单;它分为四个察哈尔巴格,横跨一个宽阔的矩形,每边约500米。每个察哈尔巴格和连接它们的小路中间都有一个喷泉,围绕中央墓穴形成一个八喷泉环。华园是莫卧儿皇帝们游乐和露营的地方。它位于巴基斯坦旁遮普省的Wah Cantt市。华园多样的动植物群营造出迷人的花木美景。果树和潜水员的鸟类和昆虫系统。简而言之,这些花园代表了《古兰经》中提到的天堂意象。

关键词：伊斯兰花园古兰经物理布局拉合尔沙拉玛花园拉合尔贾汉吉尔墓华花园

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巴基斯坦穆斯林巴赫铬铁矿床成矿环境、地质特征及控矿因素

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地质论评 2016年第B11期62卷 161-162页

作者：洪俊 TAHSEENULLAH Khan 张晶张辉善杨博 ASADA li 国土资源部岩浆作用成矿与找矿重点实验室中国西安710054 中国地质调查局西安地质调查中心中国西安710054 巴基斯坦Bahria大学地球与环境学院巴基斯坦伊斯兰堡44000 巴基斯坦地质调查局巴基斯坦伊斯兰堡44000

巴基斯坦境内蛇绿岩广泛分布，且大多发育铬铁矿化。穆斯林巴赫铬铁矿床位于巴基斯坦中部，是新特提斯缝合带中大型豆荚状铬铁矿床之一，目前已经发现数百个矿体，储量超过4000kt，是巴基斯坦境内最重要的铬铁矿产地。张洪瑞等（2013）... 详细信息

巴基斯坦境内蛇绿岩广泛分布，且大多发育铬铁矿化。穆斯林巴赫铬铁矿床位于巴基斯坦中部，是新特提斯缝合带中大型豆荚状铬铁矿床之一，目前已经发现数百个矿体，储量超过4000kt，是巴基斯坦境内最重要的铬铁矿产地。张洪瑞等（2013）总结了中部瓦济里斯坦-贝拉蛇绿岩带的地质特征和穆斯林巴赫铬铁矿床的产出特征，认为穆斯林巴赫铬铁矿床成因仍存在争议，其形成构造环境、控矿因素有待于进一步研究。

关键词：控矿因素铬铁矿穆斯林巴赫巴基斯坦

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