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A Comparative Numerical Study of Parabolic Partial Integro-Differential Equation Arising from Convection-Diffusion

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Computer Modeling in Engineering & Sciences 2021年第2期126卷 673-692页

作者： Kamil Khan Arshed ali Fazal-i-Haq Iltaf Hussain Nudrat amir Department of Mathematics Islamia CollegePeshawar25000Pakistan Department of Mathematics Statistics and Computer ScienceThe University of AgriculturePeshawar25000Pakistan Department of Basic Sciences&Islamiat University of Engineering&TechnologyPeshawar25000Pakistan Department of Basic Sciences&Humanities CECOS University of Information Technology and Emerging SciencesPeshawar25000Pakistan

This article studies the development of two numerical techniques for solving convection-diffusion type partial integro-differential equation(PIDE)with a weakly singular *** trigonometric B-spline(CTBS)functions are used for interpolation in both *** first method is CTBS based collocation method which reduces the PIDE to an algebraic tridiagonal system of linear *** other method is CTBS based differential quadrature method which converts the PIDE to a system of ODEs by computing spatial derivatives as weighted sum of function *** efficient tridiagonal solver is used for the solution of the linear system obtained in the first method as well as for determination of weighting coefficients in the second *** explicit scheme is employed as time integrator to solve the system of ODEs obtained in the second *** methods are tested with three nonhomogeneous problems for their ***,computational efficiency and numerical convergence of the methods are *** of errors in approximations produced by the present methods versus different values of discretization parameters and convection-diffusion coefficients are *** and diffusion dominant cases are discussed in terms of Peclet *** results are also compared with cubic B-spline collocation method.

关键词： Partial integro-differential equation convection-diffusion collocation method differential quadrature cubic trigonometric B-spline functions weakly singular kernel

Experimental study of hydrogen sulfide hydrate formation: Induction time in the presence and absence of kinetic inhibitor

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Journal of Energy Chemistry 2013年第1期22卷 114-118页

作者： Yousef Salamat Abdolreza Moghadassi Mohammad Illbeigi ali Eslamimanesh amir H. Mohammadi Department of Chemical Engineering Faculty of Engineering Arak University Chemical Engineering Department Faculty of Engineering Isfahan University Department of Chemical & Biomolecular Engineering Clarkson University Institut de Recherche en Gnie Chimique et Ptrolier (IRGCP) Paris Cedex France Thermodynamics Research Unit School of Chemical Engineering University of KwaZulu-Natal Howard College Campus

In this paper, the effect of adding different concentrations of kinetic inhibitors on the induction time of hydrogen sulfide hydrate formation in a reactor equipped with automatic adjustable temperature controller is studied. A novel method namely ＂sudden cooling＂ is used for performing the relevant measurements, in which the induction time of H2S hydrate in the presence/absence of PVP and L-tyrosine with different concentrations （100, 500, and 1000 ppm） is determined. As a result, PVP with the concentration of 1000 ppm in aqueous solution is detected as a more suitable material for increasing the induction time of H2S hydrate formation among the investigated kinetic hydrate inhibitors.

关键词： hy^ogen sulfide gas hydrates clathrate hydrates kinetic inhibitor induction time sudden cooling

Liver resection for the treatment of a congenital intrahepatic portosystemic venous shunt

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Hepatobiliary & Pancreatic Diseases International 2016年第3期15卷 329-333页

作者： michail papamichail amir ali alberto quaglia john karani nigel heaton Department of Hepatobiliary Pancreatic Surgery First Affiliated Hospital:King's Healthcare PartnersKing's College Hos-pital FT NHS Trust Institute of Liver Studies Denmark HillLondon SE5 9RSUK

Intrahepatic portosystemic shtmts （IPSS） are rare congenital anomalies arising from disordered portal vein em- bryogenesis. It has been described in both children and adults and may be asymptomatic or be associated with a variety of neurophysiological and pulmonary complications. When rec- ognized, early intervention to occlude the shunt will reverse the associated complications. Literature review reports of surgical and radiological occlusion of the shunt, but due to its rarity, a standard therapeutic protocol has not been established. A case of a 38-year-old woman with abdominal pain and low grade encephalopathy, diagnosed with an IPSS and treated by right hepatectomy was reported.

关键词： intrahepatic portosystemic shunt liver resection

Emerging photoluminescence from defective vanadium diselenide nanosheets

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Photonics Research 2018年第4期6卷 244-253页

作者： amir GHOBADI TURKAN GAMZE ULUSOY GHOBADI ali KEMAL OKYAY EKMEL OZBAY NANOTAM-Nanotechnology Research Center Bilkent University Department of Electrical and Electronics Engineering Bilkent University UNAM-Institute of Materials Science and Nanotechnology Bilkent University Department of Physics Bilkent University

In this paper, for the first time to our knowledge in the literature, we demonstrate photoluminescence from two-dimensional(2D) vanadium diselenide(VSe_2) nanosheets(NSs). The preparation of these nanostructures is carried out with a combinational method based on nanosecond pulsed laser ablation(PLA) and chemical exfoliation. For this aim, VSe_2 bulk is first ablated into nanoparticles(NPs) inside a water solution. Afterward,NPs are chemically exfoliated into NSs using lithium intercalation via ultrasonic treatment. Although VSe_2 is a semimetal in its bulk form, its nanostructures show photo-responsive behavior, and it turns into a strongly luminescent material when it is separated into NSs. Based on the obtained results, the surface defects induced during the PLA process are the origin of this photoluminescence from NSs. Our findings illustrate that this new material can be a promising semiconductor for photovoltaic and light emitting diode applications.

关键词： Semiconductors Optical materials Photoluminescence

AFAR:adaptive fuzzy ant-based routing for communication networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1666-1675页

作者： Seyed Javad MIRABEDINI Mohammad TESHNEHLAB M.H.SHENASA ali MOVAGHAR amir Masoud RAHMANI Engineering Department Science and Research BranchIslamic Azad UniversityTehranIran Control Department K.N.Toosi Technology UniversityTehranIran Computer Department Sharif UniversitTehranIran

We propose a novel approach called adaptive fuzzy ant-based routing (AFAR), where a group of intelligent agents (or ants) builds paths between a pair of nodes, exploring the network concurrently and exchanging obtained information to up-date the routing tables. Routing decisions can be made by the fuzzy logic technique based on local information about the current network state and the knowledge constructed by a previous set of behaviors of other agents. The fuzzy logic technique allows multiple constraints such as path delay and path utilization to be considered in a simple and intuitive way. Simulation tests show that AFAR outperforms OSPF, AntNet and ASR, three of the currently most important state-of-the-art algorithms, in terms of end-to-end delay, packet delivery, and packet drop ratio. AFAR is a promising alternative for routing of data in next generation networks.

关键词：通信网络模糊路由选择网络集群智能自适应性

A Comprehensive Survey of Candidate Waveforms for 5G, beyond 5G and 6G Wireless Communication Systems

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Open Journal of Applied Sciences 2023年第1期13卷 136-161页

作者： Bakhit Amine Adoum Kalsouabe Zoukalne Mahamat Saleh Idriss ali Mahmoud ali amir Moungache Mahamoud Youssouf Khayal Ecole Nationale Superieure des Technologies de l’Information et de la Communication (ENASTIC) N’Djamena Tchad Institute of Sciences and Techniques of Abeche (INSTA) Abeche Tchad Université de N’Djamena N’Djamena Tchad Virtual University of Chad N’djamena Tchad Centre National de Recherche pour le Developpement (CNRD) N’djamena Tchad

The evolution of global mobile data over the past decades in broadcasting, Internet of Things (IoT), education, healthcare, commerce, and energy has put strong pressure on 3G/4G mobile networks to improve their service offerings. These generations of mobile networks were initially invented to meet the requirements of the above-mentioned applications. However, as the requirements in these applications continue to increase, new mobile technologies such as 5G (fifth generation), 5G and beyond (B5G, beyond fifth generation), and 6G (sixth generation) are still progressing and being experimented. These networks are very heterogeneous generations of mobile networks that will have to offer very high throughput per user, good energy efficiency, better traffic capacity per area, improved spectral efficiency, very low latency, and high mobility. To meet these requirements, the radio interface of future mobile networks will have to be flexible and rationalized the available frequency resources. Therefore, new modulation methods, access techniques and waveforms capable of supporting these technological changes are proposed. This review presents brief descriptions of the types of 5G, B5G, and 6G waveforms. The 5G consists of OFDM including its transmission techniques: generalized frequency division multiplexing (GFDM), filter bank based multi-carrier (FBMC), universal filtered multi-carrier (UFMC), and index modulation (IM). Meanwhile, the 6G covers orthogonal time frequency space (OTFS), orthogonal chirp division multiplexing (OCDM) and orthogonal time sequence multiplexing (OTSM). The networks’ potentialities, advantages, disadvantages, and future directions are outlined.

关键词： Modulation 5G B5G 6G Waveforms

SEMI INHERITED BIVARIATE INTERPOLATION

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Analysis in Theory and Applications 2011年第2期27卷 138-149页

作者： Mohammad ali Fariborzi Araghi amir Fallahzadeh Islamic Azad University

The bivariate interpolation in two dimensional space R2 is more complicated than that in one dimensional space R, because there is no Haar space of continuous functions in R2. Therefore, the bivariate interpolation has not a unique solution for a set of arbitrary distinct pairwise points. In this work, we suggest a type of basis which depends on the points such that the bivariate interpolation has the unique solution for any set of distinct pairwise points. In this case, the matrix of bivariate interpolation has the semi inherited factorization.

关键词： inherited factorization inherited interpolation semi inherited interpolation bivariate interpolation interpolation matrix

Using Pd-salen complex as an efficient catalyst for the copper-and solvent-free coupling of acyl chlorides with terminal alkynes under aerobic conditions

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Chinese Chemical Letters 2010年第6期21卷 656-660页

作者： Mohammad Bakherad amir Hossein Amin ali Keivanloo Bahram Bahramian Mersad Raessi School of Chemistry Shahrood University of TechnologyShahroodIran

The palladium-salen complex palladium(Ⅱ) N,N'-bis{[5-(triphenylphosphonium)-methyl]salicylidene}-1,2-ethanediamine chloride was found to be a highly active catalyst for the copper- and solvent-free coupling reaction of terminal alkynes with different acyl chlorides in the presence of triethylamine as base,giving excellent ynones under aerobic conditions.

关键词： Copper-free Ynones Pd-salen complex Neat

电氧化异丙肾上腺素的纳米复合电催化剂:用作传感器（英文）

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催化学报 2015年第8期36卷 1273-1279页

作者： Mohammad Mazloum-Ardakani Mohammad ali Sheikh-mohseni Bibi-Fatemeh Mirjalili Roya Ahmadi Mohammad ali Mirhoseini 亚兹德大学理学院化学系伊朗亚兹德乌尔米耶大学米扬道阿卜Shahid Bakeri高级教育中心伊朗乌尔米耶

在金纳米粒子(AuNPs)上经苯硫酚衍生物(3,4二羟基苯基-偶氮-苯硫酚,DAT)自组装制得了一种新型纳米复合物,用于修饰玻璃碳电极(GCE/AuNP-DAT).采用循环伏安法研究了该新型电极的性质,并将其用作异丙肾上腺素(IP)电催化剂,考察了该纳米复... 详细信息

在金纳米粒子(AuNPs)上经苯硫酚衍生物(3,4二羟基苯基-偶氮-苯硫酚,DAT)自组装制得了一种新型纳米复合物,用于修饰玻璃碳电极(GCE/AuNP-DAT).采用循环伏安法研究了该新型电极的性质,并将其用作异丙肾上腺素(IP)电催化剂,考察了该纳米复合物的电催化活性,从而得到反应机理和催化反应速率常数.由于GCE/Au NP-DAT电极对尿酸氧化没有电催化活性,因此可将IP的氧化信号从该改进电极中分离出来,从而排除了尿酸对IP测定的干扰.该电极可作为传感器,当用于差动脉冲伏安法测定IP时,线性动态范围为1.0–1500.0μmol/L,检测极限为0.46μmol/L.

关键词：电催化剂金纳米粒子自组装异丙肾上腺素传感器