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燃料化学学报 2012年第6期40卷 714-720页

作者： muhammad Yaseen muhammad Shakimllah Imtiaz Ahmad Ata Ur Rahman Faiz Ur Rahman muhammad usman Rauf Razzaq Institute of Chemical Sciences University of Peshawar Khyberpukhtunkhwa Pakistan State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

In the current study simultaneous reactions of hydrodesulfurization(HDS) of dibenzothiophene(DBT) and reforming of methanol in a micro-autoclave reactor were studied over bi-metallic(Co-Mo/Al2O3 and Ni-Mo/Al2O3) and tri-metallic(Pd-Co-Mo/Al2O3 and Pd-Ni-Mo/Al2O3) catalyst systems which were prepared by incipient impregnation *** situ hydrogen utilization and low Pd loadings were the major targets of this *** comparison purpose,catalytic activity was separately determined for both the methanol reforming and HDS of DBT reactions as *** based catalysts were confirmed with better activity than Co ones for both the reactions with Pd promoted ones ranking at the top ***-Ni-Mo/Al2O3 > Ni-Mo/Al2O3 > Pd-Co-Mo/Al2O3 > Co-Mo/Al2O3 where Pd-Ni-Mo/Al2O3 showed 91% DBT conversion at 380 ℃ and 12 h reaction *** of the selected organic additives on catalytic activity were tested for their effect toward HDS reaction which was unique with close relation to their chemical *** products were quantitatively and qualitatively analyzed via HPLC and GC-MS techniques respectively which helped in elucidating reaction mechanism.

关键词：加氢脱硫二苯并噻吩催化剂高效液相色谱法

A Deep Learning Based Sentiment Analytic Model for the Prediction of Traffic Accidents

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Computers, Materials & Continua 2023年第11期77卷 1599-1615页

作者： Nadeem Malik Saud Altaf muhammad usman Tariq Ashir Ahmed muhammad Babar University Institute of Information Technology PMAS Arid Agriculture UniversityRawalpindi46000Pakistan Department of Marketing Operationsand Information SystemAbu Dhabi UniversityAbu Dhabi6844United Arab Emirates College of Computer and Information Sciences Prince Sultan UniversityRiyadh11442Saudi Arabia Robotics and Internet of Things Lab Prince Sultan UniversityRiyadh11442Saudi Arabia

The severity of traffic accidents is a serious global concern,particularly in developing *** the main causes and contributing circumstances may reduce the severity of traffic *** exist many machine learning models and decision support systems to predict road accidents by using datasets from different social media forums such as Twitter,blogs and *** such approaches are popular,there exists an issue of data management and low prediction *** article presented a deep learning-based sentiment analytic model known as Extra-large Network Bi-directional long short term memory(XLNet-Bi-LSTM)to predict traffic collisions based on data collected from social ***,a Tweet dataset has been formed by using an exhaustive keyword-based searching *** the next phase,two different types of features named as individual tokens and pair tokens have been obtained by using POS tagging and association rule *** output of this phase has been forwarded to a three-layer deep learning model for final *** experiment has been performed to test the efficiency of the proposed XLNet-Bi-LSTM *** has been shown that the proposed model achieved 94.2%prediction accuracy.

关键词： Accident XLNet Bi-LSTM association rule mining Twitter

Modulation instability analysis, optical and other solutions to the modified nonlinear Schr?dinger equation

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Communications in Theoretical Physics 2020年第6期72卷 1-12页

作者： muhammad Younis Tukur Abdulkadir Sulaiman muhammad Bilal Shafqat Ur Rehman usman Younas Punjab University College of Information Technology University of the PunjabLahore 54000Pakistan Faculty of Science Federal University DutseJigawaNigeria Department of Computer Engineering Biruni UniversityIstanbulTurkey

This paper studies the new families of exact traveling wave solutions with the modified nonlinear Schrodinger equation,which models the propagation of rogue waves in ocean *** extended Fan sub-equation method with five parameters is used to find exact traveling wave *** has been observed that the equation exhibits a collection of traveling wave solutions for limiting values of *** method is beneficial for solving nonlinear partial differential equations,because it is not only useful for finding the new exact traveling wave solutions,but also gives us the solutions obtained previously by the usage of other techniques(Riccati equation,or first-kind elliptic equation,or the generalized Riccati equation as mapping equation,or auxiliary ordinary differential equation method)in a combined ***,by means of the concept of linear stability,we prove that the governing model is stable.3 D figures are plotted for showing the physical behavior of the obtained solutions for the different values of unknown parameters with constraint conditions.

关键词： optical soliton MNLSE stability analysis generalized elliptic equation extended Fan sub-equation method

Modelling of a tubular membrane contactor for pre-combustion CO_2 capture using ionic liquids:Influence of the membrane configuration, absorbent properties and operation parameters

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Green Energy & Environment 2016年第3期1卷 266-275页

作者： Zhongde Dai muhammad usman Magne Hillestad Liyuan Deng Department of Chemical Engineering Norwegian University of Science and Technology (NTNU)

A membrane contactor using ionic liquids(ILs) as solvent for pre-combustion capture CO_2 at elevated temperature(303-393 K) and pressure(20 bar) has been studied using mathematic model in the present work. A comprehensive two-dimensional(2 D) mass-transfer model was developed based on finite element method. The effects of liquid properties, membrane configurations, as well as operation parameters on the CO_2 removal efficiency were systematically studied. The simulation results show that CO_2 can be effectively removed in this process. In addition, it is found that the liquid phase mass transfer dominated the overall mass transfer. Membranes with high porosity and small thickness could apparently reduce the membrane resistance and thus increase the separation efficiency. On the other hand, the membrane diameter and membrane length have a relatively small influence on separation performance within the operation range.

关键词： CO2 capture Pre-combustion Membrane contactor Ionic liquids Modelling

Dock-able linear and homodetic di, tri, tetra and pentapeptide library from canonical amino acids: SARS-CoV-2 Mpro as a case study

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Journal of Pharmaceutical Analysis 2023年第5期13卷 523-534页

作者： Sarfraz Ahmad muhammad usman Mirza John F.Trant Department of Chemistry and Biochemistry University of WindsorWindsor N9B 3P4OntarioCanada Binary Star Research Services LaSalle N9J 3X8OntarioCanada

Peptide-based therapeutics are increasingly pushing to the forefront of biomedicine with their promise of high specificity and low *** noncanonical residues can always be used,employing only the natural 20 residues restricts the chemical space to a finite dimension allowing for comprehensive in silico *** this goal,the dataset comprising all possible di-,tri-,and tetra-peptide combinations of the canonical residues has been previously ***,with increasing computational power,the comprehensive set of pentapeptides is now also feasible for screening as the comprehensive set of cyclic peptides comprising four or five ***,we provide both the complete and prefiltered libraries of all di-,tri-,tetra-,and penta-peptide sequences from 20 canonical amino acids and their homodetic(N-to-C-terminal)cyclic *** FASTA,simplified molecular-input line-entry system(SMILES),and structure-data file(SDF)-three dimension(3D)libraries can be readily used for screening against protein *** also provide a simple method and tool for conducting identity-based *** to this dataset will accelerate small peptide screening workflows and encourage their use in drug discovery *** a case study,the developed library was screened against severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)main protease to identify potential small peptide inhibitors.

关键词： Dipeptides Tripeptides Tetrapeptides Pentapeptides N-to-C-terminal cyclic peptides Peptide library

First COVID-19 related death in Pakistan in a patient with a travel history in Saudi Arabia

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Asian Pacific Journal of Tropical Medicine 2020年第8期13卷 375-377页

作者： Rooh Ullah muhammad Suleman Rana Mehmood Qadir muhammad usman Department of Microbiology Quaid-i-Azam UniversityIslamabadPakistan Department of Virology National Institute of HealthIslamabadPakistan Atta ur Rahman School of Applied Biosciences National University of Science and TechnologyIslamabadPakistan

Rationale: Severe acute respiratory syndrome coronavirus-2(SARS-CoV-2) has been recognized as highly pathogenic. The current pandemic of SARS-CoV-2 has been spread globally and infected more than 200 countries. Patient concerns: We report the first confirmed fatal case of COVID-19 in Pakistan. A 50-year-old man returned from Saudi Arabia on March 09, 2020 and presented with cough, fever, malaise, poor appetite and difficulty in breathing to the Pulmonologist at District Headquarter Hospital Mardan. Diagnosis: The patient was initially diagnosed as COVID-19 suspected case. A oropharyngeal swab sample was positive by realtime RT-PCR tests. Lessons: This report highlights the importance of close coordination between clinicians and public health authorities as well as the importance of early laboratory-based confirmation of COVID-19 cases.

关键词： COVID-19 SARS-CoV-2 Pakistan

Optimization of gob ventilation boreholes design in longwall mining

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International Journal of Mining Science and Technology 2020年第6期30卷 811-817页

作者： Saqib Ahmad Saki Jürgen F.Brune muhammad usman Khan University of Engineering and Technology Lahore Lahore 54890Pakistan Colorado School of Mines GoldenCO 80401USA

Gob ventilation boreholes(GVBs)are widely used for degasification in *** coal *** on geological conditions,30–50%of methane can be recovered from longwall gob using GVBs.A NIOSH funded research at the Colorado School of Mines confirmed that GVBs can efficiently reduce methane at the ***,GVBs can also draw some fresh air from the face and create explosive gas zones(EGZs).Explosive gas mixtures may be formed in gob areas due to the increased ingress of oxygen from *** is critical to identify the locations for GVBs for maximizing extraction of methane and minimizing hazards of *** study analyzes the effect of operating parameters and design of GVB on methane extraction,EGZs formation,and face and tailgate methane *** extraction,formation of EGZs,and concentration of methane in working areas are significantly impacted by various *** factors include the distance of work face and tailgate from GVBs,diameter of GVBs,vacuum pressure of wellhead,GVB distance from the roof of the coal seam,and number of operating GVBs in a *** fluid dynamics(CFD)evaluations suggest optimal design and operating parameters of GVBs that can contribute to maximum benefits with minimum risks.

关键词： Longwall mining Explosive gas zones Computational fluid dynamics Gob ventilation boreholes

Suitability of VVC and HEVC for Video Telehealth Systems

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Computers, Materials & Continua 2021年第4期67卷 529-547页

作者： muhammad Arslan usman muhammad Rehan usman Rizwan Ali Naqvi Bernie Mcphilips Christopher Romeika Daniel Cunliffe Christos Politis Nada Philip Faculty of Science Engineering and ComputingKingston UniversityLondonKT12EEUK School of Electrical Engineering Superior UniversityLahorePakistan Department of Unmanned Vehicle Engineering Sejong UniversitySeoul05006Korea Pangea Connected Ltd. LondonKT11BLUK

Video compression in medical video streaming is one of the key technologies associated with mobile *** delivery of medical video streams over a resource constrained network emphasizes the need of a video codec that requires minimum bitrates and maintains high perceptual *** paper presents a comparative study between High Efciency Video Coding(HEVC)and its potential successor Versatile Video Coding(VVC)in the context of healthcare.A large-scale subjective experiment comprising of twenty-four non-expert participants is presented for eight different test conditions in Full High Denition(FHD)*** presented analysis highlights the impact of compression artefacts on the perceptual quality of HEVC and VVC processed *** results and ndings show that VVC clearly outperforms HEVC in terms of achieving higher compression,while maintaining high quality in FHD *** requires upto 40%less bitrate for encoding an FHD video at excellent perceptual *** have provided rate-quality curves for both encoders and a degree of overlap across both codecs in terms of perceptual ***,there is a 71%degree of overlap in terms of quality between VVC and HEVC compressed videos for eight different test conditions.

关键词： Mobile healthcare subjective analysis telemedicine video compression video quality assessment

Malware Detection in Android IoT Systems Using Deep Learning

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Computers, Materials & Continua 2023年第2期74卷 4399-4415页

作者： muhammad Waqar Sabeeh Fareed Ajung Kim Saif Ur Rehman Malik muhammad Imran muhammad usman Yaseen Department of Computer Science COMSATS UniversityIslamabad45550Pakistan Department of Optical Engineering Sejong UniversitySeoul143747Korea Cybernetica AS Tallinn12618Estonia

The Android Operating System(AOS)has been evolving since its inception and it has become one of the most widely used operating system for the Internet of Things(IoT).Due to the high popularity and reliability ofAOS for IoT,it is a target of many cyber-attacks which can cause compromise of privacy,financial loss,data integrity,unauthorized access,denial of services and so *** Android-based IoT(AIoT)devices are extremely vulnerable to various malwares due to the open nature and high acceptance of Android in the ***,several detection preventive malwares are developed to conceal their malicious activities from analysis ***,conventional malware detection techniques could not be applied and innovative countermeasures against such anti-detection malwares are indispensable to secure the *** this paper,we proposed the novel deep learning-based real-time multiclass malware detection techniques for the AIoT using dynamic *** results show that the proposed technique outperforms existing malware detection techniques and achieves detection accuracy up to 99.87%.

关键词： Android cyber security deep learning internet of things malware detection

Hybrid simulation using implicit solver coupling with HLA and FMI

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第4期8卷 224-244页

作者： muhammad usman Awais Milos Cvetkovic and Peter Palensky National University of Computing and Emerging Science LahorePakistan Department of Electrical Engineering Mathematics and Computer Science TU Delft Building 36Room B36-LB 03.230 Mekelweg 42628CD DelftNetherlands

Hybrid systems such as Cyber Physical System(CPS)are becoming increasingly popular,mainly due to the involvement of information technology in different aspects of *** analysis and verification of hybrid system models,simulation is used *** parts of a common hybrid system may belong to different domains of study,it is sometimes beneficial to use specialized simulation packages(SPs)for each *** this case,parts of a system are simulated in different *** idea may seem simple,but coupling more than one simulation component presents challenges related to numerical *** presented article suggests an implicit solver coupling technique enhanced to facilitate simulation of hybrid models using multiple simulation *** technique is developed using two of the most popular simulation interoperability standards,namely,the High Level Architecture and the Functional Mock-up *** using these standards,the developed algorithm will be useful for a large number of practitioners and *** developed algorithm is described using a generic distributed computation model,which makes it reproducible even without using the *** the verification of results,the algorithm is tested on two case *** results are compared to a monolithic simulator and the proximity of results initiates the validity of the developed algorithm.

关键词： Distributed simulation algorithms co-simulation distributed simulation parallel simulation continuous simulation simulation interoperability DEVS OpenModelica Modelica