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Coincidence Points and Invariant Approximation Results for Multimaps

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Acta Mathematica Sinica,English Series 2007年第9期23卷 1601-1610页

作者： Donal O'REGAN Naseer shahzad Department of Mathematics National University of IrelandGalwayIreland Department of Mathematics King Abdul Aziz University

Some coincidence point theorems satisfying a general contractive condition are proved. As applications, some invariant approximation results are also obtained and several related results in the literature are either e... 详细信息

关键词： coincidence point weak commutativity best approximant

Comparison of Fission Induced by Protons and Pions

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Chinese Physics Letters 2011年第8期28卷 58-60页

作者： Zafar Yasin M.Ikram shahzad Physics Division PINSTECHP.O.NiloreIslamabadPakistan

We compare the properties of fission induced by protons and *** different methodologies are used to make this ***,it is shown that pion-induced fission cross sections are not much different in magnitude from proton-induced fission cross sections at the same beam kinetic ***,across the pion-nucleon(3,3)resonance so prominent with free nucleons,it has been observed that there is no significant change in the reaction mechanism in the case of ***,it is noted that an empirical expression used for evaluations of proton-induced fission cross sections is also valid for positive pion-induced fission cross sections,at least for actinide *** cross sections computed using a cascade-exciton model code for ^(209)Bi and ^(238)U are also compared with the experimental data available.

关键词： energy beam kinetic

Alginate encapsulation in Glycyrrhiza glabra *** phyto-chemical profiling of root extracts of in vitro converted plants using GC-MS analysis

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Asian Pacific Journal of Tropical Biomedicine 2017年第10期7卷 855-861页

作者： Rakhshanda Akhtar Anwar shahzad Plant Biotechnology Section Department of BotanyAligarh Muslim UniversityAligarh 202002Uttar PradeshIndia

Objective: To investigate the conversion potential of alginate encapsulated nodes of Glycyrrhiza glabra with phyto-chemical evaluation of root extract of field transferred ***: The excised axenic nodal segments were encapsulated in alginate matrix planted on Murashige and Skoog(1962) medium with different supplementation and formulations of PGRs. The two year old field transferred plants were evaluated for phytocompounds analysis using GC-MS ***: Varied responses were observed during the study, maximum conversion95.83% ± 2.40% was obtained in these encapsulates when planted on MS medium containing 2.5 m M Kinetin and 0.5 m M a-Naphthalene acetic acid, which eventually developed into complete plantlets in a single step. Further, GC-MS analysis showed the presence of different phyto-compounds in the methanolic root extracts of in vitro converted plants. The results obtained revealed the presence of about 47 phyto-compounds along with various potential bioactive compounds useful for industrial and pharmaceutical ***: This study investigates high frequency regeneration and conversion of Glycyrrhiza glabra in a single step in short time. Also, the in vitro raised plants are analysed for bioactive compounds after field transfer, which shows the presence of numerous compounds useful for commercial and pharmacological purposes.

关键词： Synseeds Conservation Licorice Morphogenic Chemopreventive

Multi Sensor-Based Implicit User Identification

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Computers, Materials & Continua 2021年第8期68卷 1673-1692页

作者： Muhammad Ahmad Rana Aamir Raza Manuel Mazzara Salvatore Distefano ali Kashif Bashir Adil Khan Muhammad shahzad Sarfraz Muhammad Umar Aftab Department of Computer Science National University of Computer and Emerging SciencesChiniot35400Pakistan Department of Computer Science Bahauddin Zakariya UniversityMultan66000Pakistan Institute of Software Development and Engineering Innopolis UniversityInnopolis420500Russia Dipartimento di Matematica e Informatica—MIFT University of MessinaMessina98121Italy Department of Computing and Mathematics Manchester Metropolitan UniversityManchesterUK

Smartphones have ubiquitously integrated into our home and work environments,however,users normally rely on explicit but inefficient identification processes in a controlled ***,when a device is stolen,a thief can have access to the owner’s personal information and services against the stored *** a result of this potential scenario,this work proposes an automatic legitimate user identification system based on gait biometrics extracted from user walking patterns captured by smartphone sensors.A set of preprocessing schemes are applied to calibrate noisy and invalid samples and augment the gait-induced time and frequency domain features,then further optimized using a non-linear unsupervised feature selection *** selected features create an underlying gait biometric representation able to discriminate among individuals and identify them *** classifiers are adopted to achieve accurate legitimate user *** experiments on a group of 16 individuals in an indoor environment show the effectiveness of the proposed solution:with 5 to 70 samples per window,KNN and bagging classifiers achieve 87–99%accuracy,82–98%for ELM,and 81–94%for *** proposed pipeline achieves a 100%true positive and 0%false-negative rate for almost all classifiers.

关键词： Sensors smartphone legitimate user identification

Generalized Ⅰ-Nonexpansive Selfmaps and Invariant Approximations

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Acta Mathematica Sinica,English Series 2008年第5期24卷 867-876页

作者： M.A.AL-THAGAFI Naseer shahzad Department of Mathematics King AbduIAziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

Common fixed point results for new classes of noncommuting selfmaps satisfying generalized I-contraction or I-nonexpansive type conditions are established. We apply them to obtain several invariant approximation resul... 详细信息

关键词： common fixed point occasionally weakly compatible map ultraoccasionally weakly compatible map generalized I-nonexpansive map invariant approximation

Effect of Firing Temperature on the Electromagnetic Properties of Electronic Transformer Cores Developed by Using Nanosized Mn–Zn Ferrite Powders

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Acta Metallurgica Sinica(English Letters) 2015年第2期28卷 159-163页

作者： Hassan Waqas Ammad Hussain Qureshi Muhammad shahzad Materials Division Directorate of Technology PINSTECH

Current investigation deals with the effect of grain growth process as a function of sintering temperature on the electromagnetic properties （initial permeability, impedance, and gain） of Mn-Zn ferrite （MZF） cores （toroids）. By employing auto combustion process, nanosized [（20 ± 5） nm] MZF powders were synthesized and toroid shape cores were obtained after subsequent calcination and firing （sintering） process. It was observed that the submicron structure （0.5 μm） achieved in the ferrite core sintered at 1,000 ℃ was gradually transformed into micron size grains by increasing the firing temperature i.e., 1,100, 1,200, and 1,350 ℃. The results reveal that MZF core sintered at low temperature （1,000 ℃） showed high impedance, low initial permeability, and narrow working frequency range i.e., 3-15 MHz. However, the improvement in initial permeability, sintered density, and operational frequency range （100 kHz-17 MHz） was observed at high temperature （1,350 ℃） firing in the inert environment. This synthesized MZF core is more suitable for miniaturized switch mode power supply applications.

关键词： Mn-Zn ferrites Nanosized powders Impedance Sintering

Public Reaction to Scientific Research via Twitter Sentiment Prediction

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Journal of Data and Information Science 2022年第1期7卷 97-124页

作者： Murtuza shahzad Hamed Alhoori Northern Illinois University 100 Normal Road Dekalb Illinois 60115United States

Purpose:Social media users share their ideas,thoughts,and emotions with other ***,it is not clear how online users would respond to new re search *** study aims to predict the nature of the emotions expressed by Twitter users toward scientific ***,we investigate what features of the research articles help in such *** the sentiments of research articles on social media will help scientists gauge a new societal impact of their research ***/methodology/appro ach:Several tools are used for sentiment analysis,so we applied five sentiment analysis tools to check which are suitable for capturing a tweet’s sentiment value and decided to use NLTK VADER and *** segregated the sentiment value into negative,positive,and *** measure the mean and median of tweets’sentiment value for research articles with more than one *** next built machine learning models to predict the sentiments of tweets related to scientific publications and investigated the essential features that controlled the prediction ***:We found that the most important feature in all the models was the sentiment of the research article title followed by the author *** observed that the tree-based models performed better than other classification models,with Random Forest achieving 89%accuracy for binary clas sification and 73%accuracy for three-label clas *** limitations:In this research,we used state-of-the-art sentiment analysis ***,these libraries might vary at times in their sentiment prediction *** sentiment may be influenced by a multitude of circumstances and is not always immediately tied to the paper’s *** the future,we intend to broaden the scope of our research by employing word2 vec *** implications:Many studies have focused on understanding the impact of science on scientists or how science communicators can improve their ***

关键词： Sentiment analysis Social media Twitter Emotional impact Public understanding of science Science and technology studies

Hydrodynamics of viscous fluid through porous slit with linear absorption

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Applied Mathematics and Mechanics(English Edition) 2016年第3期37卷 361-378页

作者： A.M.SIDDIQUI T.HAROON A.shahzad Department of Mathematics Pennsylvania State UniversityYork Campus Department of Mathematics COMSATS Institute of Information Technology

The exact solutions for the viscous fluid through a porous slit with linear ab- sorption are obtained. The Stokes equation with non-homogeneous boundary conditions is solved to get the expressions for the velocity components, pressure distribution, wall shear stress, fractional absorption, and leakage flux. The volume flow rate and mean flow rate are found to be useful in obtaining a convenient form of the longitudinal velocity component and pressure difference. The points of the maximum velocity components for a fixed axial distance are identified. The value of the linear absorption parameter is ran- domly chosen, and the rest available data of the rat kidney to the tabulate pressure drop and fractional absorption are incorporated. The effects of the linear absorption, uniform absorption, and flow rate parameters on the flow properties are discussed by graphs. It is found that forward flow occurs only if the volume flux per unit width is greater than the absorption velocity throughout the length of the slit, otherwise back flow may occur. The leakage flux increases with the increase in the linear absorption parameter. Streamlines are drawn to help the analysis of the flow behaviors during the absorption of the fluid flow through the renal tubule and purification of blood through an artificial kidney.

关键词： exact solution porous slit linear absorption renal tubule

Surface Passivation of Ti/4H-SiC Schottky Barrier Diode

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Communications in Theoretical Physics 2012年第10期58卷 577-582页

作者： Muhammad Khalid Saira Riaz shahzad Naseem Microelectronics Division/Centre of Excellence in Solid State Physics School of Physical SciencesUniversity of the Punjab

Surface properties of SiC power devices mostly depend on the passivation layer(PL).This layer has direct influence on electrical characteristics of devices.2D numerical simulation of forward and reverse characteristics with and without different(PLs)(SiO2,HfO2 and Si3N4) has been *** results show that the breakdown voltage increases with increasing PL thickness,and there is a lesser significant effect on forward *** maximum breakdown voltage with and without SiO2 PL is 1240 V and 276 V,***2 PL has compatibility with SiC surface providing high breakdown voltage,6 and 8% higher than that of HfO2 and Si3N4 *** leakage current is observed which then further decreases on reducing the thickness of ***,variation of forward current with dielectric constant and thickness of PLs was ***,it is suggested that matches of our results with published experimental results indicate that the Sentaurus TCAD simulator is a predictive tool for the SiC Schottky barrier diode simulation.

关键词： Passivation breakdown voltage leakage current electric field on-resistance