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Inverse full state hybrid projective synchronization for chaotic maps with different dimensions

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Chinese Physics B 2016年第9期25卷 251-256页

作者： adel Ouannas Giuseppe Grassi Laboratory of Mathematics Informatics and Systems (LAMIS) University of Larbi Tebessi Tebessa 12002 Algeria University del Salento Dipartimento Ingegneria Innovazione 73100 Lecce Italy

A new synchronization scheme for chaotic（hyperchaotic） maps with different dimensions is ***,given a drive system map with dimension n and a response system with dimension m,the proposed approach enables each drive system state to be synchronized with a linear response combination of the response system *** method,based on the Lyapunov stability theory and the pole placement technique,presents some useful features：（i） it enables synchronization to be achieved for both cases of n 〈 m and n 〉 m;（ii） it is rigorous,being based on theorems;（iii） it can be readily applied to any chaotic（hyperchaotic） maps defined to ***,the capability of the approach is illustrated by synchronization examples between the two-dimensional H′enon map（as the drive system） and the three-dimensional hyperchaotic Wang map（as the response system）,and the three-dimensional H′enon-like map（as the drive system） and the two-dimensional Lorenz discrete-time system（as the response system）.

关键词： chaotic map full state hybrid projective synchronization inverse problem maps with different dimensions

Autonomous fault-diagnosis and decision-making algorithm for determining faulty nodes in distributed wireless networks

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 885-896页

作者： adel KHOSRAVI Yousef SEIFI KAVIAN Electrical Engineering Department Faculty of Engineering Shahid Chamran University of Ahvaz

In this paper, we address fault-diagnosis agreement(FDA) problems in distributed wireless networks(DWNs) with arbitrary fallible nodes and healthy access points. We propose a new algorithm to reach an agreement among fault-free members about the faulty ones. The algorithm is designed for fully connected DWN and can also be easily adapted to partially connected networks. Our contribution is to reduce the bit complexity of the Byzantine agreement process by detecting the same list of faulty units in all fault-free members. Therefore, the malicious units can be removed from other consensus processes. Also, each healthy unit detects a local list of malicious units, which results in lower packet transmissions in the network. Our proposed algorithm solves FDA problems in 2t+1 rounds of packet transmissions, and the bit complexity in each wireless node is O(nt+1).

关键词： Fault diagnosis Decision making Byzantine agreement Distributed wireless networks Consensus

Energy-Efficient Static Data Collector-based Scheme in Smart Cities

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Computers, Materials & Continua 2022年第7期72卷 2077-2092页

作者： adel D.Rajab College of Computer Science and Information Systems Najran UniversityNajran61441Saudi Arabia

In the Internet of Things(IoT)-based smart city applications,employing the Data Collectors(DC)as the data brokers between the nodes and Base Station(BS)can be a promising solution to enhance the energy efficiency of energy-constrained IoT sensor *** are several schemes that utilize mobile DCs to collect the data packets from sensor ***,moving DCs along the hundreds of thousands of sensors sparsely distributed across a smart city is considered a design challenge in such *** concern lies in how these mobile DCs are being ***,to overcome these limitations,we exploit multiple energy-limited Static Data Collectors(SDC)which are deployed at the locations optimized so that the energy consumption of both nodes and SDCs is ***,anUnmannedAerial Vehicle(UAV)-enabled wireless power transfer is considered for sustaining the SDCs to avoid their energy depletion and data packet *** sustainable charging process operates periodically in each cycle so that the UAV flies from a charging station and after recharging the SDCs,it comes back to the station to be *** this study,we formulate a problem to optimize the movement trajectory and charging time of UAV so that sustainable operation of SDCs during a cycle can be *** the prior studies,our proposed scheme determines the optimal trajectory and charging time at the beginning of each cycle which leads to increase accuracy in comparison with long-term optimization-based *** outcomes of simulation experiments show that the proposed scheme achieves improved network performance in terms of data delivery ratio(12.5%);system throughput(6.6%);total energy consumption(59.19%);and network lifetime(58%)as compared to previous related works.

关键词： Smart city wireless sensor network power constraint energy efficiency

Integrated Random Early Detection for Congestion Control at the Router Buffer

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Computer Systems Science & Engineering 2022年第2期40卷 719-734页

作者： Ahmad adel Abu-Shareha The World Islamic Sciences and Education University(WISE) AmmanJordan

This paper proposed an Integrated Random Early Detection(IRED)method that aims to resolve the problems of the queue-based AQM and loadbased AQM and gain the benefits of both using indicators from both *** arrival factor(e.g.,arrival rate,queue and capacity)and the departure factors are used to estimate the congestion through two integrated *** utilized indicators are mathematically calculated and integrated to gain unified and coherent congestion ***,IRED is built based on a new dropping calculation approach that fits the utilized congestion indicators while maintaining the intended buffer management criteria,avoiding global synchronization and enhancing the *** results showed that IRED,compared to RED,BLUE,ERED,FLRED,EnRED and DcRED,decreased packet delay and loss under various network ***,the results showed that in heavy and moderate traffic,the proposed IRED method outperformed the state-of-the-art methods in loss and delay by 18% and 10.6%,respectively.

关键词： Congestion random early detection active queue management

Effect of five diatomaceous earth formulations against Tribofium castaneum （Coleoptera： Tenebrionidae）, Oryzaephflus surinamensis （Coleoptera： Silvanidae） and Rhyzopertha dominica （Coleoptera： Bostrychidae）

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Insect Science 2007年第5期14卷 359-365页

作者： MASUMEH ZIAEE adel KHASHAVEH Department of Zoology Young Researcher Club of Urmia Islamic Azad University Urmia Department of Entomology Agricultural Faculty Urmia University Urmia Iran

Laboratory bioassays were conducted to determine the effect of food source on the survival of Tribolium castaneum Herbst, Oryzaephilus surinamensis L. and Rhyzopertha dominica F., after exposure to five diatomaceous earth （DE） formulations： Protect-It, Insecto, Perma-GuardTM, Dryacide and SilicoSec. Adults of these species were exposed to DEs at the rate of 0.5 mg/cm^2 for 1 day on filter paper inside plastic Petri dishes. After exposure, the initial mortality was counted and live individuals of the three species were held for a week in glass vials containing 50 mg wheat flour, rice and whole wheat, respectively. In the second experiment, after 1 day exposure to DEs, beetles were transferred to Petri dishes without food and held for a week to determine if the presence of food source would decrease the mortality of beetles. Experiments were carried out at 27℃ and 55% RH in the dark. The initial mortality in both of the experiments reached 100% for the three species exposed to Protect-It and in the case ofR. dominica and O. surinamensis exposed to Dryacide. In contrast, low level of mortality （〈 10%） was observed for T. castaneum exposed to Perma-GuardTM and Insecto. The mortality after the post-treatment period on food was decreased for the three species exposed to Perma-GuardTM and in the case of T. castaneum and R. dominica exposed to Insecto and SilicoSec. Adults of O. surinamensis were the most susceptible followed by R. dominica and 100% adult mortality was obtained, whereas T. castaneum were the least susceptible beetles to DEs. Protect-It and Dryacide were the most efficient DE formulations and can be used effectively in a stored grain integrated pest management program.

关键词： diatomaceous earth initial mortality food delayed mortality Oryzaephilus surinamensis Rhyzopertha dominica Tribolium castaneum

Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior

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Chinese Journal of Aeronautics 2019年第2期32卷 361-368页

作者： Walid M.adel Guozhu LIANG School of Astronautics Beihang University

The aging behavior of softening composite solid propellant was investigated by measuring its mechanical and ballistic prosperities during prolonged storage at elevated and room temperatures. Accelerated aging was conducted at 65 °C for 231 days while the normal aging was performed at 25 ± 3 °C and relative humidity less than 50% for 8 years. The mechanical properties were obtained from uniaxial tensile tests for the aged propellant specimens while the ballistic properties were determined from static firing tests of subscale motors aged for 112 days at 65 °C. The mechanical results show that the maximum tensile strength and Young's modulus initially increase and subsequently decrease with increasing aging time, while the maximum tensile strain generally increases with increasing aging time. The ballistic properties like burning rate show a small change which cannot affect the ballistic performance. The experimental results show that the changes in the mechanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From this study, it is observed that the propellant ages through a combination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the most significant process, which makes the propellant soft and extendible. The observed aging mechanism has been modeled using an exponential function with two terms which can describe the complex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant mechanical properties. The shelf life of this propellant formulation at 25 °C is predicted to be 13 years using the modulus as failure criteria and control parameter.

关键词： Aging Hydrolysis Service life Softening behavior Solid propellant

Determination and Analysis of Optical Constant of Annealed Sn_2Sb_2S_5 Thin Films

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Acta Metallurgica Sinica(English Letters) 2015年第5期28卷 656-662页

作者： Yousra Fadhli adel Rabhi Mounir Kanzari Laboratoire de Photovoltaque et Matriaux Semi-Conducteurs ENIT BP 37 Le belvdère 1002 Tunis Tunisia

The effects of annealing on structural, optical and electrical properties of Sn2Sb2S5 thin films were studied. Sn2Sb2S5 thin films were deposited on no-heated glass substrates by single source vacuum evaporation method. The as- deposited films were annealed in air for 1 h at 100, 200 and 300 ℃. XRD study shows that annealed films are crystallized according to the preferential orientation （602）. Optical measurements show that the thin films have relatively high absorption coefficients in the range of 10s-106 cm-1 in the energy range of 2-3.25 eV. It is also found that Sn2Sb2S5 exhibit two optical direct transitions. The models of Wemple-DiDomenico and Spitzer-Fan were applied for the analysis of the dispersion of the refractive index and the determination of the optical and dielectric constants. The electrical resistivity measurements are recorded, and two activation energy values are determined. The layers annealed at 200 and 300 ℃ exhibit a resistive hysteresis behavior. The properties reported here offer perspective to Sn2SbES5 for its application in many advanced technologies.

关键词： Sn2Sb2S5 thin films Optical constants Electrical properties

Towards automated software model checking using graph transformation systems and Bogor

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第8期10卷 1093-1105页

作者： Vahid RAFE adel T.RAHMANI Department of Computer Engineering Iran University of Science and Technology

Graph transformation systems have become a general formal modeling language to describe many models in software development *** modeling of dynamic systems and model-to-model transformations are only a few examples in which graphs have been used to software *** even the perfect graph transformation system must be equipped with automated analysis capabilities to let users understand whether such a formal specification fulfills their *** this paper,we present a new solution to verify graph transformation systems using the Bogor model *** attributed graph grammars(AGG)-like graph transformation systems are translated to Bandera intermediate representation(BIR),the input language of Bogor,and Bogor verifies the model against some interesting properties defined by combining linear temporal logic(LTL) and special-purpose graph *** results are encouraging,showing that in most cases our solution improves existing approaches in terms of both performance and expressiveness.

关键词： Graph transformation Verification Bogor Attributed graph grammars (AGG) Software model checking

Finite Generation of Lie Derived Powers of Skew Lie Algebras

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Algebra Colloquium 2022年第2期29卷 217-220页

作者： adel Alahmadi Fawziah Alharthi Department of Mathematics Research Group of Algebraic Structures and Applications Deanship of Scientific ResearchKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics College of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics College of ScienceQassim University Buraydah 51482Saudi Arabia

Let A be a finitely generated associative algebra over a field of characteristic different from *** asked when the Lie algebra[A,A]is finitely ***,it was shown that for a finitely generated nil algebra A all derived powers of A are finitely generated Lie *** K be the Lie algebra of skew-symmetric elements of an associative algebra with *** consider all derived powers of the Lie algebra K and prove that for any finitely generated associative nil algebra with an involution,all derived powers of K are finitely generated Lie algebras.

关键词： associative algebra Lie subalgebra finitely generated