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Multiscale Image Dehazing and Restoration:An Application for Visual Surveillance

Computers, Materials & Continua 2022年第1期70卷 1-17页

作者： Samia riaz Muhammad Waqas Anwar irfan riaz Hyun-Woo Kim Yunyoung Nam Muhammad Attique Khan Department of Computer Science COMSATS University IslamabadWah Campus47040Pakistan Department of Computer Science COMSATS University IslamabadLahore CampusLahorePakistan Department of Electronics and Communication Engineering Hanyang UniversityAnsanKorea Department of ICT Convergence Soonchunhyang UniversityAsan31538Korea Department of Computer Science HITEC University TaxilaTaxila47080Pakistan

The captured outdoor images and videos may appear blurred due to haze,fog,and bad weather *** droplets or dust particles in the atmosphere cause the light to scatter,resulting in very limited scene discernibility and deterioration in the quality of the image ***,image dehazing has gainedmuch popularity because of its usability in a wide variety of *** algorithms have been proposed to solve this ill-posed *** algorithms provide quite promising results in some cases,but they include undesirable artifacts and noise in haze patches in adverse *** of these techniques take unrealistic processing time for high image *** this paper,to achieve real-time halo-free dehazing,fast and effective single image dehazing we propose a simple but effective image restoration technique using multiple *** will improve the shortcomings of DCP and improve its speed and efficiency for high-resolution images.A coarse transmissionmap is estimated by using the minimumof different size *** a cascaded fast guided filter is used to refine the transmission *** introduce an efficient scaling technique for transmission map estimation,which gives an advantage of very low-performance degradation for a highresolution *** performance evaluation,quantitative,qualitative and computational time comparisons have been performed,which provide quiet faithful results in speed,quality,and reliability of handling bright surfaces.

关键词： Dehaze defog pixel minimum patch minimum edge preservation

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Exploring the potential of Sentinel-2A satellite data for aboveground biomass estimation in fragmented Himalayan subtropical pine forest

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Journal of Mountain Science 2020年第12期17卷 2880-2896页

作者： Mobushir riaz KHANI Iftikhar Ahmad KHAN Muhammad Hasan Ali BAIG LIU Zheng-jia Muhammad irfan ASHRAF School of Environmental Science Charles Sturt UniversityAlburyNSW 2640Australia Institute of Geo-information&Earth Observation Arid Agriculture University RawalpindiPakistan&(ii)Department of ForestAzad Jammu&Kashmir Muzaffarabad-i3100Pakistan Institute of Geo-information&Earth Observation(IGEO) PMAS Arid Agriculture University Rawalpindi 46300Pakistan Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Forestry&Range Management PMAS Arid Agriculture University Rawalpindi 46300Pakistan

The Sentinel-2 A satellite having embedded advantage of red edge spectral bands offers multispectral imageries with improved spatial,spectral and temporal resolutions as compared to the other contemporary satellites providing medium resolution *** study was aimed at exploring the potential of Sentinel-2 A imagery to estimate Above Ground Biomass(AGB) of Subtropical Pine Forest in Pakistan administered *** developed an AGB predictive model using field inventory and Sentinel 2 A based spectral and textural parameters along with topographic features derived from ALOS Digital Elevation Model(DEM).Field inventory data was collected from 108 randomly distributed plots(0.1 ha each) across the study *** stepwise linear regression method was employed to investigate the potential relationship between field data and corresponding satellite *** and carbon mapping of the study area was carried out through established AGB estimation model with R(o.86),R2(0.74),adjusted R2(0.72) and RMSE value of 33 t/*** results showed that first order textures(mean,standard deviation and variance) significantly contributed in AGB predictive modeling while only one spectral band ratio made contribution from spectral *** study leads to the conclusion that Sentinel-2 A optical data is a potential source for AGB estimation in subtropical pine forest of the area of interest with added benefit of its free of cost availability,higher quality data and long-term continuity that can be utilized for biomass carbon distribution mapping in the resource constraint study area for sustainable forest management.

关键词： Field inventory Forest Biomass Sentinel 2A AGB Modelling Spectral features Textures

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Device Discovery in D2D Communication: Scenarios and Challenges

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Computers, Materials & Continua 2023年第4期75卷 1735-1750页

作者： Adeel Iqbal Ali Nauman riaz Hussain irfan Latif Khan Ali Khaqan Sana Shuja Sung Won Kim COMSATS University Islamabad45550Pakistan Yeungnam University Gyeongsan-si38541Korea

Device to Device (D2D) communication is expected to be anessential part of 5G cellular networks. D2D communication enables closeproximitydevices to establish a direct communication session. D2D communicationoffers many advantages, such as reduced latency, high data rates,range extension, and cellular offloading. The first step to establishing a D2Dsession is device discovery;an efficient device discovery will lead to efficientD2D communication. D2D device further needs to manage its mode of communication,perform resource allocation, manage its interference and mostimportantly control its power to improve the battery life of the device. Thiswork has developed six distinct scenarios in which D2D communication canbe initiated, considering their merits, demerits, limitations, and optimizationparameters. D2D communication procedures for the considered scenarioshave been formulated, based upon the signal flow, containing device discovery,resource allocation, and session teardown. Finally, latency for each scenariohas been evaluated, based on propagation and processing delays.

关键词： D2Dcommunication device discovery latency resource allocation

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Darboux transformation and exact multisolitons for a matrix coupled dispersionless system

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Communications in Theoretical Physics 2020年第7期72卷 1-7页

作者： H Wajahat A riaz Department of Mathematics China University of Mining and TechnologyBeijing100083China

We present a matrix coupled dispersionless(CD)system.A Lax pair for the matrix CD system is proposed and Darboux transformation is constructed on the solutions of the matrix CD system and the associated Lax *** express an N soliton formula for the solutions of the matrix CD system in terms of *** using properties of the quasideterminants,we obtain some exact solutions,including bright and dark-type solitons,rogue wave and breather solutions of the matrix CD ***,it has been shown that the solutions of the matrix CD system are expressed in terms of solutions to the usual CD system,sine-Gordon equation and Maxwell-Bloch system.

关键词： Matrix coupled dispersionless system Darboux transformation solitons

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Adsorption of ruthenium ions on activated charcoal: influence of temperature on the kinetics of the adsorption process

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第5期6卷 353-356页

作者： QADEER riaz Pakistan Atomic Energy Commission IslamabadPakistan

Influence of temperature on ruthenium adsorption on activated charcoal from 3 mol/L HNO3 solutions was inves- tigated in the temperature range of 288 K to 308 K. It was observed that the rise in temperature increases the adsorption of ru- thenium ions on activated charcoal and follows the kinetics of first order rate law with rate constant values 0.0564?0.0640 min?1 in the temperature range of 288 K to 308 K respectively. The activation energy for the adsorption process was found to be 1.3806 kJ/mol. Various thermodynamics quantities namely ?H, ?S and ?G were computed from the equilibrium constant KC values. The results indicated a positive heat of adsorption, a positive ?S and a negative ?G.

关键词： Ruthenium Activated charcoal Adsorption Kinetics Thermodynamic parameters Nitric acid solution

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Effect of Reaction Temperature and Time on the Structural Properties of Cu(In,Ga)Se_2 Thin Films Deposited by Sequential Elemental Layer Technique

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Journal of Materials Science & Technology 2007年第4期23卷 499-503页

作者： Saira riaz Shahzad NASEEM Centre for Solid State Physics University of the Punjab QACLahore-54590Pakistan

Thin films of copper indium gallium selenide Cu（In,Ga）Se2 （CIGS） were prepared by sequential elemental layer deposition in vacuum at room temperature. The as-deposited films were heated in vacuum for compound formation, and were studied at temperature as high as 1250℃ for the first time. These films were concurrently studied for their structural properties by X-ray diffraction （XRD） technique. The XRD analyses include phase transition studies, grain size variation and microstrain measurements with the reaction temperature and *** has been observed that there are three distinct regions of variation in all these parameters. These regions belong to three temperature regimes：〈450℃, 450-950℃, and 〉950℃. It is also seen that the compound formation starts at 250℃, with ternary phases appearing at 350℃ or above. Whereas, there is another phase shift at 950℃ without any preference to the quaternary compound.

关键词： Cu(In,Ga)Se2 (CIGS) X-ray Diffraction Thin films Structural analysis

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The quasi-Gramian solution of a non-commutative extension of the higher-order nonlinear Schr?dinger equation

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Communications in Theoretical Physics 2024年第3期76卷 51-61页

作者： H W A riaz J Lin Department of Physics Zhejiang Normal UniversityJinhua 321004China

The nonlinear Schr?dinger(NLS)equation,which incorporates higher-order dispersive terms,is widely employed in the theoretical analysis of various physical *** this study,we explore the non-commutative extension of the higher-order NLS *** treat real or complex-valued functions,such as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ the Lax pair associated with the evolution equation,as in the commutation *** derive the quasi-Gramian solution of the system by employing a binary Darboux *** soliton solutions are presented explicitly within the framework of *** visually understand the dynamics and solutions in the given example,we also provide simulations illustrating the associated ***,the solution can be used to study the stability of plane waves and to understand the generation of periodic patterns within the context of modulational instability.

关键词： integrable systems Darboux transformation solitons

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Principal Component Analysis and Minimum Description Length Criterion Based on Through-Wall Image Enhancement

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Chinese Physics Letters 2013年第4期30卷 45-47页

作者： Muhammad Mohsin riaz Abdul Ghafoor Department of Electrical Engineering College of SignalsNational University of Sciences and Technology(NUST)IslamabadPakistan

A through-wall image enhancement scheme is proposed based on principal component analysis and minimum description length *** minimum description length criterion is used with principal component analysis to extract target eigen *** proposed scheme is capable of extracting multiple targets from heavy cluttered through-wall *** results of the proposed scheme are compared with existing schemes on the basis of quantitative analysis and visual inspection.

关键词： criterion. Image scheme

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Accelerated Iterative Learning Control for Linear Discrete Systems with Parametric Perturbation and Measurement Noise

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Computer Modeling in Engineering & Sciences 2022年第8期132卷 605-626页

作者： Xiaoxin Yang Saleem riaz School of Energy and Architecture Xi’an Aeronautical UniversityXi’an710077China School of Automation Northwestern Polytechnical UniversityXi’an170072China

An iterative learning control algorithm based on error backward association and control parameter correction has been proposed for a class of linear discrete time-invariant systems with repeated operation characteristics,parameter disturbance,and measurement noise taking PD type ***,the concrete form of the accelerated learning law is presented,based on the detailed description of how the control factor is obtained in the ***,with the help of the vector method,the convergence of the algorithm for the strict mathematical proof,combined with the theory of spectral radius,sufficient conditions for the convergence of the algorithm is presented for parameter determination and no noise,parameter uncertainty but excluding measurement noise,parameters uncertainty and with measurement noise,and the measurement noise of four types of scenarios ***,the theoretical results show that the convergence rate mainly depends on the size of the controlled object,the learning parameters of the control law,the correction coefficient,the association factor and the learning *** results show that the proposed algorithm has a faster convergence rate than the traditional PD algorithm under the same conditions.

关键词： Iterative learning control monotone convergence convergence rate gain adjustment

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Visible–light driven photocatalytic degradation of bisphenol-A using ultrasonically synthesized polypyrrole/K-birnessite nanohybrids:Experimental and DFT studies

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Journal of Environmental Sciences 2019年第5期31卷 161-173页

作者： Jannatun Zia Mohamed Ajeer Ufana riaz Materials Research Laboratory Department of ChemistryJamia Millia Islamia

Although manganese oxides are known for their semiconductor characteristics, the photocatalytic performance of conducting polymer intercalated K-Birnessite(K-Bi) has not been explored till date. With the view to design a visible light driven organic–inorganic hybrid photocatalyst for rapid degradation of Bisphenol A(BPA), the present work reports the ultrasound-assisted green synthesis of K-Bi/polypyrrole(Ppy) nanohybrids. The loading of Ppy in K-Bi was confirmed by thermogravimetric analysis while the formation of organic–inorganic hybrid was confirmed by infrared spectroscopy. K-Bi revealed a band gap of 2.8 e V while for the nanohybrids it was found to be ranging between 2.4 and 1.6 e V. X-ray diffraction studies confirmed partial intercalation of Ppy chains in the inter-layer space of K-Bi. High resolution transmission electron microscopy and scanning electron microscopy studies showed mixed morphology of K-Birnessite/Ppy nanohybrids. Rapid degradation of BPA was observed under visible irradiation in presence of K-Bi/Ppy nanohybrids and almost90% degradation of 20 mg/L BPA solution was achieved within 120 min. The degradation was found to follow pseudo-first order kinetics and the degraded fragments were identified using liquid chromatography-mass spectrometry. Degradation pathway was proposed based on density-functional theory calculations of fukui index predicting the radical easyattacking(f0) and(f-) sites in BPA.

关键词： Photocatalysis Degradation kinetics Manganese oxide Polypyrrole DFT calculations

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