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The Journal of China Universities of Posts and Telecommunications 2012年第4期19卷 122-128页

作者： Tariq Aziz Nasir saleem Muhammad Iqba School of Information and Communication Beijing University of Posts and Telecommunications

In this paper, we have compared the performance of joint network channel coding （JNCC） for multicast relay network using low density parity check （LDPC） codes and Convolutional codes as channel codes while exclusive or （XOR） network coding used at the intermediate relay nodes. Multicast relay transmission is a type of transmission scheme in which two fixed relay nodes contribute in the second hop of end-to-end transmission between base transceiver station （BTS） and a pair of mobile stations. We have considered one way and two way multicast scenarios to evaluate the bit error rate （BER） and throughput performance. It has been shown that when using XOR network coding at the intermediate relay nodes, the same transmission becomes possible in less time slots hence throughput performance can be improved. Moreover we have also discussed two possible scenarios in the proposed system model, in which both diversity and multiplexing gain has been considered. It is worth notifying that BER and throughput achieved for LDPC codes is better than Convolutional codes for all the schemes discussed.

关键词： cooperative relaying network coding multicast relay networks LDPC codes convolutional codes

Analysis and Power Quality Improvement in Hybrid Distributed Generation System with Utilization of Unified Power Quality Conditioner

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Computer Modeling in Engineering & Sciences 2023年第2期134卷 1105-1136页

作者： Noor Zanib Munira Batool saleem Riaz Farkhanda Afzal Sufian Munawar Ibtisam Daqqa Najma saleem Department of Electrical Engineering University of Engineering and TechnologyTaxila47050Pakistan School of Automation Northwestern Polytechnical University170072Xi’anChina National University Science&Technology MCSIslamabad44000Pakistan Department of Quantitative Methods College of Business AdministrationImam Abdulrahman Bin Faisal UniversityDammam34212Saudi Arabia Department of Mathematics and Natural Sciences College of Sciences and Human StudiesPrince Mohammad Bin Fahd UniversityKhobar31952Saudi Arabia

This paper presents a comprehensive study that includes the sizing and power flow by series and parallel inverters in a distributed generation system(DGs)that integrates the system of hybrid wind photovoltaic with a unified power quality conditioner(UPQC).In addition to supplying active power to the utility grid,the system of hybrid wind photovoltaic functions as a UPQC,compensating reactive power and suppressing the harmonic load ***,the load is supplied with harmonic-free,balanced and regulated output *** PVWind-UPQC is established on a dual compensation scheme,the series inverter works like a sinusoidal current source,while the parallel inverter works like a sinusoidal voltage ***,a smooth alteration from interconnected operating modes to island operating modes and vice versa can be achieved without load voltage *** PV-Wind-UPQC inverters handle the energy generated through the hybrid wind photovoltaic system and the energy demanded through the load,the converters should be sized cautiously.A detailed study of the flow of power via the PV-Wind-UPQC is imperative to gain a complete understanding of the system operation and the proper design of the ***,curves that allow the sizing of the power converters according to the power flow via the converters are presented and *** results are presented to assess both steady state and dynamic performances of the grid connected hybrid system of *** investigation is verified by simulating and analyzing the results with Matlab/Simulink.

关键词： Photovoltaic wind turbine unified power quality conditioner power flow distributed generation system

Hyperinsulinemia,cancer and maqui berry:The promise of nutritional supplementation

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Food Science and Human Wellness 2019年第3期8卷 264-267页

作者： Brett Deters Mir saleem Halmos College of Natural Sciences and Oceanography NOVA Southeastern UniversityFort LauderdaleFL 33314USA

Nutritional supplementation has long been studied as a possible treatment alternative or as an adjunct to the standard treatments for common ailments and *** to the latest research,the Chilean maqui berry,Aristotelia chilensis,has been shown to reduce postprandial insulin levels by as much as fifty *** berry,which has been shown to be as effective as metformin at increasing insulin sensitivity and controlling blood glucose levels,follows a simple mechanism of action that involves the inhibition of sodium dependent glucose transporters in the small intestine,slowing the rate at which sugars enter the bloodstream and thereby decreasing blood sugar spikes and the corresponding increase in insulin *** high blood glucose levels have been proven to play a significant role in the development of cancers,as diabetics and prediabetics have been proven to have elevated risk of developing cancerous *** dietary supplementation with maqui berry may therefore indirectly reduce the risk of cancer,as well as other diseases which respond negatively to hyperglycemia and hyperinsulinemia.

关键词： Hyperinsulinemia Cardiovascular disease Diabetes Insulin Maqui berry Cancer

A Mathematical Model for Studying the Slip Effect on Peristaltic Motion with Heat and Mass Transfer

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Chinese Physics Letters 2011年第3期28卷 120-123页

作者： Tasawar Hayat Najma saleem Awatif A.Hendi Department of Mathematics Quaid-i-Azam University Islamabad 44000Pakistan Department of Physics Faculty of SciencesKing Saud UniversityP.O.Box 1846Riyadh 11321Saudi Arabia

A mathematical model is presented with an interest to examine the peristaltic motion in an asymmetric channel by taking into account the slip,heat and mass *** relationships for a micropolar fluid are *** solution procedure for nonlinear analysis is given under long wavelength and low Reynolds number *** effects of sundry parameters entering into the expressions of axial velocity,temperature and concentration are *** and trapping phenomena are discussed.

关键词： Mathematical trapping asymmetric

The outcomes of pars plana vitrectomy without endotamponade for tractional retinal detachment secondary to proliferative diabetic retinopathy

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 671-674页

作者： Rao Muhammad Rashad Qamar Muhammad Imran saleem Muhammad Farhan saleem Department of Ophthalmology Eye Unit-IB.V.Hospital

AIM:To evaluate the outcomes of pars plana vitrectomy(PPV) without the use of an ocular tamponade in patients having tractional retinal detachment(TRD) secondary to proliferative diabetic retinopathy(PDR).METHODS:It was an interventional study conducted at the Department of Ophthalmology,***,Bahawalpur,Pakistan,from July 2011 to July 2012.A total of 75 patients(84 eyes) having TRD secondary to PDR were treated by PPV without using an ocular *** patients included in the study had a tractional retinal detachement secondary to proliferative diabetic retinopathy but didn’t have or develop retinal breaks before or during the study *** surgical procedure included a PPV combined with the removal of the tractional retinal membranes and the application of endolaser photocoagulation to the *** mean follow-up period was 12 months. RESULTS:Successful retinal reattachement was observed in 78 of the operated eyes(92.8%).In these patients,the retina remained attached till the end of the one year follow-up *** in best corrected visual acuity(BCVA) was seen in 63 eyes(75%).The visual acuity remained unchanged in 9 eyes(10.7%).Mean improvement in BCVA was 2.00 +1.24 at baseline to 1.24+1.22(P<0.05) at the end of the followup ***:In the absence of the retinal breaks,a TRD secondary to PDR can be successfully treated by pars plana vitrectomy without the use of an ocular tamponade.

关键词： endotamponade pars plana vitrectomy proliferative diabetic retinopathy tractional retinal detachment

Enhanced room temperature ferromagnetism in Cr-doped ZnO nanoparticles prepared by auto-combustion method

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Journal of Semiconductors 2018年第4期39卷 20-27页

作者： Khizar-ul Haq M.Irfan Muhammad Masood Murtaza saleem Tahir iqbal Ishaq Ahmad M.A.Khan M.Zaffar Muhammad Irfan Department of Physics Mirpur University of Science and Technology (MUST) Department of Physics SBASST Lahore University of Management Sciences Experimental Physics Labs National Centre for Physics Quaid-e-Azam University Department of Physics University of Azad Jammu and Kashmir Muzaffarabad

Zn1-xCrxO （x = 0.00, 0.01, 0.03, 0.05, 0.07, and 0.09） nanoparticles were synthesized, by an auto-com- bustion method. Structural, optical, and magnetic characteristics of Cr-doped ZnO samples calcined at 600 ℃ have been analyzed by using X-ray diffraction （XRD）, field emission scanning electron microscope （FESEM）, UV-Vis spectroscopy and vibrating sample magnetometer （VSM）. The XRD data confirmed the hexagonal wurtzite structure of pure and Cr-doped ZnO nanoparticles. The calculated values of grain size using Scherrer＇s formula are in the range of 30.7-9.2 nm. The morphology of nanopowders has been observed by FESEM, and EDS results con- firmed a systematic increase of Cr content in the samples and clearly indicate with no impurity element. The band gaps, computed by UV-Vis spectroscopy, are in the range of 2.83-2.35 eV for different doping concentrations. By analyzing VSM data, significantly enhanced room temperature ferromagnetism is identified in Cr-doped ZnO samples. The value of magnetization is a 12 times increased of the value reported by Daun et al. （2010）. Room temperature ferromagnetism of the nanoparticles is of vital prominence for spintronics applications.

关键词： Cr-doped ZnO auto-combustion DMS ferromagnetism

Gravitomagnetic Effects on Collective Plasma Oscillations in Compact Stars

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Communications in Theoretical Physics 2006年第3期45卷 568-572页

作者： Babur M. Mirza Hamid saleem Depaxtment of Mathematics Quaid-i-Azam University Islamabaci 45320 Pakistan PINSTECH Nilore Islamabad Pakistan COMSATS Institute of Information Technology Islamabad Pakistan

The effects of gravitomagnetic force on plasma oscillations are investigated using the kinetic theory of homogeneous electrically neutral plasma in the absence of external electric or magnetic field. The random phase assumption is employed neglecting the thermal motion of the electrons with respect to a fixed ion background. It is found that the gravitomagnetic force reduces the characteristic frequency of the plasma thus enhancing the refractive index of the medium. The estimates for the predicted effects are given for a typical white dwarf, pulsar, and neutron star.

关键词： gravitomagnetism compact stars plasma osillations

The role of glutamine in supporting gut health and neuropsychiatric factors

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Food Science and Human Wellness 2021年第2期10卷 149-154页

作者： Brett J.Deters Mir saleem Halmos College of Natural Sciences and Oceanography NOVA Southeastern UniversityFort LauderdaleFL 33314 USA

Recent research has shown that the amino acid glutamine can positively affect gut health by supporting the gut microbiome,gut mucosal wall integrity,and by modulating infiammatory *** modulated by the vagus nerve,via the enteric nervous system,the gut-brain connection can impact the brain’s neurochemical *** gut health can disrupt the balance of neurotransmitters,which can result in neuropsychiatric based conditions such as *** supplementation may provide significant adjunctive nutritional support in cases of depression by promoting proper gut health and function.

关键词： Glutamine Gut Neuropsychiatry Enteric nervous system Neurotransmitters Microbiome

A Survey on Channel Measurements and Models for Underground MIMO Communication Systems

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China Communications 2023年第8期20卷 103-119页

作者： Asad saleem Yejun He Guoxin Zheng Zhining Chen State Key Laboratory of Radio Frequency Heterogeneous Integration Guangdong Engineering Research Center of Base Station Antennas and PropagationShenzhen Key Laboratory of Antennas and PropagationCollege of Electronics and Information EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai UniversityShanghai 200444China Department of Electrical and Computer Engineering National University of SingaporeSingapore

The high reliability of the communication system is critical in metro and mining applications for personal safety,channel optimization,and improving operational *** paper surveys the progress of wireless communication systems in underground environments such as tunnels and mines from 1920 to 2022,including the evolution of primitive technology,advancements in channel modelling,and realization of various wireless propagation *** addition,the existing and advanced channel modeling strategies,which include the evolution of different technologies and their applications;mathematical,analytical,and experimental techniques for radio propagation;and significance of the radiation characteristics,antenna placement,and physical environment of multiple-input multiple-output(MIMO)communication systems,are *** given study introduces leaky coaxial cable(LCX)and distributed antenna system(DAS)designs for improving narrowband and wideband channel *** paper concludes by figuring out open research areas for the future technologies.

关键词： leaky coaxial cable(LCX) long-term evolution for metro(LTE-M) multiple-input multipleoutput(MIMO)systems propagation modeling

INTERACTION OF POLYVINYLPYRROLIDONE WITH METAL CHLORIDE AQUEOUS SOLUTIONS

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Chinese Journal of Polymer Science 2004年第6期22卷 581-584页

作者： Mohammad saleem Khan Khaista Gul Najeeb Ur Rehman National Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 PakistanNational Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 PakistanNational Center of Excellence in Physical Chemistry University of Peshawar Peshawar 25120 Pakistan

Interactions of polyvinylpyrrolidone (PVP) with metal chlorides (MgCl 2 , CaCl 2 , KCl and BaCl 2 ) have been investigated by viscometric and spectrophotometric techniques in aqueous solutions. Intrinsic viscosity [η] of (PVP) has shown a discontinuity with varying concentration of metal chlorides. The decreasing order of effectiveness of cation is K 1+ > Ca 2+ > Mg 2+ > Ba 2+ for poly(vinylpyrrolidone) solution. Changes in the absorption spectra of the cosolutes were observed in the presence of PVP in the lower limit of the UV-visible region i.e. 200-210 nm. These changes were attributed to interaction of PVP molecules with the cosolute molecules. As the concentration of the cosolute increased, a red shift in the peaks was observed, indicating an increase in interaction between PVP and cosolutes.

关键词： Polyvinylpyrrolidone PVP Metal chlorides Interaction Intrinsic Viscosity