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Optimizing Steering Angle Predictive Convolutional Neural Network for Autonomous Car

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Computers, Materials & Continua 2022年第5期71卷 2285-2302页

作者： Hajira Saleem Faisal Riaz Asadullah Shaikh Khairan Rajab Adel Rajab Muhammad akram Mana Saleh Al Reshan Control Automotive and Robotics Lab Affiliated lab of National Center of Robotics and Automation(NCRA HEC Pakistan)and with the Department of Computer Science and Information TechnologyMirpur University of Science and Technology(MUST)Mirpur Azad Kashmir10250Pakistan College of Computer Science and Information System Najran UniversityNajran61441Saudi Arabia College of Computer Science and Engineering University of South FloridaTampa33620United States

Deep learning techniques,particularly convolutional neural networks(CNNs),have exhibited remarkable performance in solving visionrelated problems,especially in unpredictable,dynamic,and challenging *** autonomous vehicles,imitation-learning-based steering angle prediction is viable due to the visual imagery comprehension of *** this regard,globally,researchers are currently focusing on the architectural design and optimization of the hyperparameters of CNNs to achieve the best *** has proven the superiority of metaheuristic algorithms over the manual-tuning of ***,to the best of our knowledge,these techniques are yet to be applied to address the problem of imitationlearning-based steering angle ***,in this study,we examine the application of the bat algorithm and particle swarm optimization algorithm for the optimization of the CNN model and its hyperparameters,which are employed to solve the steering angle prediction *** validate the performance of each hyperparameters’set and architectural parameters’set,we utilized the Udacity steering angle dataset and obtained the best results at the following hyperparameter set:optimizer,Adagrad;learning rate,0.0052;and nonlinear activation function,exponential linear *** per our findings,we determined that the deep learning models show better results but require more training epochs and time as compared to shallower *** show the superiority of our approach in optimizing CNNs through metaheuristic algorithms as compared with the manual-tuning *** testing was also performed using the model trained with the optimal architecture,which we developed using our approach.

关键词： Bat algorithm convolutional neural network hyperparameters metaheuristic optimization algorithm steering angle prediction

Triple Key Security Algorithm Against Single Key Attack on Multiple Rounds

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Computers, Materials & Continua 2022年第9期72卷 6061-6077页

作者： Muhammad akram Muhammad Waseem Iqbal Syed Ashraf Ali Muhammad Usman Ashraf Khalid Alsubhi Hani Moaiteq Aljahdali Department of Computer Science Superior University Lahore54000Pakistan Department of Software Engineering Superior University Lahore54000Pakistan Department of Computer Science The Institute of Management Sciences(PAK-AIMS)Lahore54000Pakistan Department of Computer Science GC Women University SialkotPakistan Department of Computer Science King Abdulaziz UniversityJeddahSaudi Arabia Faculty of Computing and Information Technology King Abdulaziz UniversityJeddahSaudi Arabia

In cipher algorithms,the encryption and decryption are based on the same *** are some limitations in cipher algorithms,for example in polyalphabetic substitution cipher the key size must be equal to plaintext otherwise it will be repeated and if the key is known then encryption becomes *** paper aims to improve the said limitations by designing of Triple key security algorithm(TKS)in which the key is modified on polyalphabetic substitution cipher to maintain the size of the key and *** plaintext character is substituted by an alternative *** mode of substitution is transformed cyclically which depends on the current position of the modified *** keys are used in the encryption and decryption process on 8 or 16 rounds with the Exclusively-OR(XOR)of the 1st *** study also identifies a single-key attack on multiple rounds block cipher in mobile communications and applied the proposed technique to prevent the *** utilization of the TKS algorithm,the decryption is illustrated,and security is analyzed in detail with mathematical examples.

关键词： Encryption decryption cipher symmetric key cryptography single key attack

Kinetics of Soil Potassium Release Under Long-Term Imbalanced Fertilization in Calcareous Soils

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Pedosphere 2017年第6期27卷 1105-1115页

作者： akram FATEMI Soil Science Department Razi UniversityKermanshah ***(Iran)

Knowledge on potassium ion(K^+) release from soils makes K fertilizer recommendation more efficient and *** of K^+release under continuous fertilization of no fertilizer(CK), urea(N), triple superphosphate(P), and urea + triple superphosphate(NP) without K fertilizer was investigated in calcareous(chloritic and kaolinitic) soils on the Miandarband Plain in Kermanshah Province of *** results showed that the kinetics of K^+release included an initial reaction and a slow *** phosphateand NH_4^+-induced K^+release followed the same rate process during the rapid(2–192 h) and slow release periods(192–1 090 h).There were no significant differences in the cumulative K^+released from the chloritic and kaolinitic soils among all the *** cumulative K^+released was positively correlated with P adsorption capacity for the chloritic(r = 0.461, P N = CK for the chloritic soils, and N =P > NP > CK for the kaolinitic *** study showed that K fixation potential and P adsorption capacities controlled K^+release from *** information will be helpful for precise fertilizer recommendations for the studied soils.

关键词： clay mineralogy initial release rate index K fixation potential P adsorption capacity triple superphosphate urea

Magnetohydrodynamic peristaltic flow of a hyperbolic tangent fluid in a vertical asymmetric channel with heat transfer

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Acta Mechanica Sinica 2011年第2期27卷 237-250页

作者： Sohail Nadeem Safia akram Department of Mathematics Quaid-i-Azam University 45320 Islamabad 44000 Pakistan Department of Electrical (Telecom) Engineering Military College of Signals National University of Sciences and Technology Rawalpindi 46000 Pakistan

In the present paper we discuss the magnetohydrodynamic （MHD） peristaltic flow of a hyperbolic tangent fluid model in a vertical asymmetric channel under a zero Reynolds number and long wavelength approximation. Exact solution of the temperature equation in the absence of dissipation term has been computed and the analytical ex- pression for stream function and axial pressure gradient are established. The flow is analyzed in a wave frame of reference moving with the velocity of wave. The expression for pressure rise has been computed numerically. The physical features of pertinent parameters are analyzed by plotting graphs and discussed in detail.

关键词： MHD flow Hyperbolic tangent fluid Vertical asymmetric channel Heat transfer

Physical,Thermal and Partial Discharge Evaluation of Nano Alumina Filled Silicone Rubber in an Inclined Plane Test

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1242-1249页

作者： M.Tariq Nazir Faizan Tahir Butt Haider Hussain B.Toan Phung Shakeel akram M.Shoaib Bhutta Ghulam Yasin School of Engineering RMIT UniversityMelbourneVIC 3000Australiaand the School of Mechanical and Manufacturing EngineeringUniversity of New South Wales SydneyNSW 2052Australia School of Electrical Engineering and Telecommunications University of New South Wales SydneyNSW 2052Australia Institut d'Electronique et des Systès(IES) UMR 5214CNRSUniversitéde Montpellier34095 MontpellierFrance State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChonging 400044China State Key Laboratory of Chemical Resource Engineering College of EnergyBeijing University of Chemical TechnologyBeijing 100029China

Silicone rubber(SiR)composite material is a modern-day insulator for high voltage outdoor *** imperfection attributed to SiR is its weak resistance to tracking and erosion when exposed to an outdoor polluted environment which reduces its operational *** paper investigates the performance of SiR with the addition of 0,1,2.5,5,10 and 20%by weight contents of nano alumina(Al_(2)O_(3)).Inclined plane tests are performed according to IEC 60587 using the step up tracking voltage method with an initial voltage of 3.0 kV and the contaminant solution flow rate is maintained at 0.3 ml/min using a peristaltic *** applied voltage level is increased at a rate of 0.25 kV/*** suggest that physical tracking,erosion,RMS leakage current and surface partial discharge(PD)performance of samples is improved with the addition of nano *** tracking length,eroded mass,RMS leakage current and average PD magnitude are measured 22%,79%,30%and 52%lesser in 20 wt%relative to 0 wt%,respectively.A thermal distribution analysis is undertaken with infrared camera and it is discovered that heat is accumulated in the discharge area of the liquid *** maximum temperature on the insulating specimen is decreased with increasing nanofiller *** above promising findings can be due to better thermal stability with low chain mobility at the interaction zone of SiR and ***,less liquid evaporation due to better thermal conduction and improved physical bonding between SiR and nano alumina are possible reasons behind the excellent performance of nanocomposites.

关键词： Alumina(Al_(2)O_(3)) dry band arcing(DBA) inclined plane test(IPT) infrared thermal analysis leakage current partial discharge(PD) silicone rubber(SiR) thermal properties

AMC Integrated Multilayer Wearable Antenna for Multiband WBAN Applications

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Computers, Materials & Continua 2022年第5期71卷 3227-3241页

作者： Iqra Aitbar Nosherwan Shoaib akram Alomainy Abdul Quddious Symeon Nikolaou Muhammad Ali Imran Qammer H.Abbasi Research Institute for Microwave and Millimeter-Wave Studies(RIMMS)National University of Sciences and Technology(NUST) H-1244000IslamabadPakistan School of Electronic Engineering and Computer Science Queen Mary University of LondonLondonE14NSUK KIOS Research and Innovation Center of Excellence University of Cyprus2109NicosiaCyprus Frederick Research Center(FRC)and Department of Electrical Engineering Frederick University1036NicosiaCyprus James Watt School of Engineering University of GlasgowGlasgowG128QQU.K

In this paper,a compact,efficient and easy to fabricate wearable antenna integrated with Artificial Magnetic Conductor(AMC)is *** of slots and bevels/cuts in the rectangular monopole patch antenna yield a wide bandwidth along with band *** proposed antenna is backed with an AMC metasurface that changes the bidirectional radiation pattern to a unidirectional,thus,considerably reducing the Specific Absorption Ratio(SAR).The demonstrated antenna has a good coverage radiating away from the body and presents reduced radiation towards the body with a front-to-back ratio of 13 dB and maximum gain of 3.54 *** proposed design operates over a wide frequency band of 2.9 to 12 GHz(exceeding the designated 3.1−10.6 GHz Ultra-Wideband(UWB)band).The band notches were created using slots on the radiating patch in the sub-bands from 5.50 to 5.67 GHz and 7.16 to 7.74 *** overall dimensions of the structure are 33×33×6.75 *** antenna’s radiation performance increased considerably with the addition of the AMC *** SAR values for the antenna are reduced by 85.3%when the AMC is used and are 0.083 W/kg which is well below the FCC SAR *** simple design,miniaturized profile,low SAR and wide operating bands with multiple band notches make the presented antenna an appealing choice for several UWB wearable body area network(WBAN)applications.

关键词： Ultra-wideband(UWB) monopole antenna wearable antenna specific absorption ratio(SAR)

SYNTHESIS AND CHARACTERIZATION OF OPTICALLY ACTIVE POLY(AMIDE-IMIDE)S BASED ON[N,N'-(4,4'-CARBONYLDIPHTALOYL)-BIS-LAMINO DIACID]S AND l,5-BIS(4-AMINOPHENYL)PENTA-l,4-DIEN-3-ONE

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Chinese Journal of Polymer Science 2012年第6期30卷 777-785页

作者： Khalil Faghihi akram Feyzi Organic Polymer Chemistry Research Laboratory Department of ChemistryFaculty of ScienceArak UniversityArak38156Iran

Six dicarboxylic acids 3a-3f were synthesized dianhydride 1 with L-aminoacids 2a-2f in a solution of glacial new poly（amide-imide）s PAIs were synthesized from by the reaction of 3,3＇,4,4＇-benzophenonetetracarboxylic acetic acid/pyridine （Py） at refluxing temperature. Then six the direct polycondensation reaction of [N,N＇-（4,4＇- carbonyldiphtaloyl）-bis-L-amino diacid]s with 1,5-bis（4-aminophenyl）penta-l,4-dien-3-one （APPD）. The polymerization reactions produced a series of new optically active PAls with high yield and good inherent viscosity. Also these PAls are optically active and soluble in various organic solvents chromatography for the separation of enantiomeric mixtures. FTIR and 1H-NMR spectroscopy, elemental analyses, thermogravimetric analysis （TGA）. These resulting new polymers can be used in column The resulted polymers were fully characterized by means of inherent viscosity measurements, solubility tests and

关键词： Organosoluble polymers Thermal properties Glass transition.

Antibacterial activity and mechanism of newly developed Zr-30Ta and Zr-25Ta-5Ti alloys against implant-associated infection

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Rare Metals 2022年第12期41卷 4176-4187页

作者： Hai-Lin Yang akram Nasser Juaim Ling Zou Meng-Zhen Zhu Xiao-Na Chen Chen-Xu Ma Xiong-Wen Zhou State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008China Department of Prosthodontics Center of StomatologyXiangya HospitalCentral South UniversityChangsha 410008China Department of Prosthodontics Faculty of DentistryThamar UniversityDharmarYemen Department of Oral Implantology Xiangya Stomatological Hospital and School of StomatologyCentral South UniversityChangsha 410008China

Infection is a common problem after implantation,and the currently used Ti-based implants have insufficient antibacterial *** newly developed Zr-30Ta and Zr-25Ta-5Ti alloys exhibited good mechanical properties,low elastic moduli,and high corrosion *** this work,their antibacterial activities and antibacterial mechanisms were *** surface roughness,wettability,and charge of the alloys were evaluated using a profilometer,drop shape analyzer,and electrokinetic analyzer,*** antibacterial activity against Streptococcus mutans and Porphyromonas gingivalis was investigated using the inhibition zone assay,plate count assay,live/dead staining,and scanning electron microscopy(SEM).The reactive oxygen species release(ROS)was evaluated using the 2’7’-dichlorodihydrofluorescein diacetate(DCFH-DA)*** results demonstrated that Zr-30Ta and Zr-25Ta-5Ti alloys had favorable smooth,hydrophilic,negatively charged surfaces that decreased bacteria adhesion and prevented biofilm ***-30Ta and Zr-25Ta-5Ti alloys also exhibited a time-dependent decrease in the bacteria adhesion and ***-30Ta and Zr-25Ta-5Ti alloys were also found to induce direct membrane damage and increase ROS production,resulting in significantly better antibacterial activities than ***-30Ta and Zr-25Ta-5Ti alloys exhibited comparable antibacterial *** work suggests that the newly developed Zr-30Ta and Zr-25Ta-5Ti alloys have good antibacterial activity against Streptococcus mutans and Porphyromonas gingivalis and are promising candidate materials for dental and orthopedic implants.

关键词： Zirconium-tantalum Dental implant Antibacterial Peri-implant infection Biofilm

Update on hydroxychloroquine use in pregnancy

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World Journal of Experimental Medicine 2023年第4期13卷 99-101页

作者： Wassan Nori Nabeeha Najatee akram Raid M Al-Ani Department of Obstetrics and Gynecology Mustansiriyah UniversityBaghdad 10052Iraq Department of Pediatrics Mustansiriyah UniversityBaghdad 10052Iraq Department of Surgery/Otolaryngology University of AnbarAnbar 31001Iraq

It is well-known that hydroxychloroquine(HCQ)treats malaria,systemic lupus erythematosus,and rheumatoid arthritis in women for its immunomodulatory and anti-inflammatory ***,HCQ was used in cases with refractory antiphospholipid *** safety was reinforced in pregnant women owing to insignificant reports of adverse pregnancy outcomes and major congenital ***,HCQ was tested in cases with chronic placental inflammation with a promising result of increased life birth;however,its benefit needs further *** aimed to highlight the recent updates for HCQ use in various conditions in pregnancy.

关键词： Pregnancy Hydroxychloroquine Preeclampsia Antiphospholipid syndrome Chronic placental inflammation COVID-19