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Network Quality Assessment in heterogeneous Wireless Settings: An Optimization Approach

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Computers, Materials & Continua 2022年第4期71卷 439-455页

作者： Sultan h.almotiri Mohammed A.al Ghamdi Computer Science Department College of Computer and Information ScienceUmm AlQura UniversityMakkahKingdom of Saudi Arabia

The identification of an effective network which can efficiently meet the service requirements of the target,while maintaining ultimate performance at an increased level is significant and challenging in a fully interconnected wireless *** wrong selection can contribute to unwanted situations like frustrated users,slow service,traffic congestion issues,missed and/or interrupted calls,and wastefulness of precious network *** schemes estimate the handoff need and cause the network screening process by a single *** strategies are not effective enough because traffic characteristics,user expectations,network terminology and other essential device metrics are not taken into *** article describes an intelligent computing technique based on Multiple-Criteria Decision-Making(MCDM)approach developed based on integrated Fuzzy AhP-TOPSIS which ensures flexible usability and maximizes the experience of end-users in miscellaneous wireless *** different components the handover need is assessed and the desired network is ***,fuzzy sets provide effective solutions to address decision making problems where experts counter uncertainty to make a *** proposed research endeavor will support designers and developers to identify,select and prioritize best attributes for ensuring flexible usability in miscellaneous wireless *** results of this research endeavor depict that this proposed computational procedure would be the most conversant mechanism for determining the usability and experience of end-users.

关键词： Wireless sensor networks fuzzy logic AhP-TOPSIS miscellaneous network intelligent computing techniques

Non-integer Order Control Scheme for Pressurized Water Reactor Core Power

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Computers, Materials & Continua 2022年第7期72卷 651-662页

作者： Ibrahim M.Mehedi Maher h.al-Sereihy Asmaa Ubaid al-Saggaf Ubaid M.al-Saggaf Department of Electrical and Computer Engineering(ECE) King Abdulaziz UniversityJeddah21589Saudi Arabia Center of Excellence in Intelligent Engineering Systems(CEIES) King Abdulaziz UniversityJeddah21589Saudi Arabia

Tracking load changes in a pressurized water reactor(PWR)with the help of an efficient core power control scheme in a nuclear power station is very *** reason is that it is challenging to maintain a stable core power according to the reference value within an acceptable tolerance for the safety of *** overcome the uncertainties,a non-integer-based fractional order control method is demonstrated to control the core power of *** available dynamic model of the reactor core is used in this *** power is controlled using a modified state feedback approach with a non-integer integral scheme through two different approximations,CRONE(Commande Robuste d’Ordre Non Entier,meaning Non-integer orderRobust Control)and FOMCON(non-integer order modeling and control).Simulation results are produced using MATLAB■*** non-integer results are compared with an integer order PI(Proportional Integral)algorithm to justify the effectiveness of the proposed ***-spacemodel Core power control Non-integer control Pressurized water reactor PI controller CRONE FOMCON.

关键词： Sate-space model core power control non-integer control pressurized water reactor PI controller CRONE FOMCON

Detailed Description of Mixed Symmetry States in ^94Mo Using Interacting Boson Model

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Communications in Theoretical Physics 2002年第6期37卷 699-705页

作者： F.h.al－Khudair LONGGui－Lu DepartmentofPhysics TsinghuaUniversityBeijing100084China

We have investigated the low-lying collective states and electromagnetic transitions in 94Mo within the framework of the interacting boson model. The influence of model parameters on the energy levels and electromagnetic properties has been investigated. The analysis of the obtained results and the parameter values predict that the 23+state is the lowest mixed symmetry state with pure F = Fmax - 1 in this nucleus. The calculated results predicate that the 25+ (two-Q-phonon) mixed symmetry state is closed to the J = 2+ at 2.870 MeV in the experimental data, and the 2.965 MeV state is the lowest mixed symmetry with J = 3+.

关键词：核物理 ^94Mo混合对称态相互作用玻色子模型

Improving the utility of locally differentially private protocols for longitudinal and multidimensional frequency estimates

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Digital Communications and Networks 2024年第2期10卷 369-379页

作者： héber h.Arcolezi Jean-François Couchot Bechara al Bouna Xiaokui Xiao Inria andÉcole Polytechnique(IPP) PalaiseauFrance Femto-ST Institute Univ.Bourg.Franche-ComtéUBFCCNRSBelfortFrance TICKET Lab. Antonine University Hadat-BaabdaBaabdaLebanon School of Computing National University of SingaporeSingaporeSingapore

This paper investigates the problem of collecting multidimensional data throughout time(i.e.,longitudinal studies)for the fundamental task of frequency estimation under Local Differential Privacy(LDP)*** to frequency estimation of a single attribute,the multidimensional aspect demands particular attention to the privacy ***,when collecting user statistics longitudinally,privacy progressively ***,the“multiple”settings in combination(i.e.,many attributes and several collections throughout time)impose several challenges,for which this paper proposes the first solution for frequency estimates under *** tackle these issues,we extend the analysis of three state-of-the-art LDP protocols(Generalized Randomized Response–GRR,Optimized Unary Encoding–OUE,and Symmetric Unary Encoding–SUE)for both longitudinal and multidimensional data *** the known literature uses OUE and SUE for two rounds of sanitization(***),i.e.,L-OUE and L-SUE,respectively,we analytically and experimentally show that starting with OUE and then with SUE provides higher data utility(i.e.,L-OSUE).also,for attributes with small domain sizes,we propose Longitudinal GRR(L-GRR),which provides higher utility than the other protocols based on unary ***,we also propose a new solution named Adaptive LDP for LOngitudinal and Multidimensional FREquency Estimates(alLOMFREE),which randomly samples a single attribute to be sent with the whole privacy budget and adaptively selects the optimal protocol,i.e.,either L-GRR or *** shown in the results,alLOMFREE consistently and considerably outperforms the state-of-the-art L-SUE and L-OUE protocols in the quality of the frequency estimates.

关键词： Local differential privacy Discrete distribution estimation Frequency estimation Multidimensional data Longitudinal studies

On a hybrid Preamble/Soft-Output Demapper Approach for Time Synchronization for IEEE 802.15.6 Narrowband WBAN

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China Communications 2015年第2期12卷 1-10页

作者： Imen Nasr Leila najjar Atallah Sofiane Cherif YANG Jianxiao WANG Kunlun Unité d'Informatique et d'Ingènierie des Systemes(U2IS) Ecole Nationale Supérieure de Techniques Avancées(ENSTA Paris Tech) Communication Signal and Image(COSIM) LaboratoryHigher School of Communications of Tunis(Sup'Com) Network Coding and Transmission Laboratory Shanghai Jiao Tong University

In this paper,we present a maximum likelihood(ML) based time synchronization algorithm for Wireless Body Area Networks(WBAN).The proposed technique takes advantage of soft information retrieved from the soft demapper for the time delay *** algorithm has a low complexity and is adapted to the frame structure specified by the IEEE 802.15.6standard[1]for the narrowband *** results have shown good performance which approach the theoretical mean square error limit bound represented by the Cramer Rao Bound(CRB).

关键词： WBAN IEEE 802.15.6 time synchronization ML estimation soft demapping

Toward the Optimization of the Region-Based P300 Speller

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Computers, Materials & Continua 2021年第4期67卷 1169-1189页

作者： A.Benabid najjar N.alSahly R.alShamass M.hosny Department of Software Engineering King Saud UniversityRiyadh11451Saudi Arabia Department of Computer Science King Saud UniversityRiyadh11451Saudi Arabia

Technology has tremendously contributed to improving communication and facilitating daily ***-Computer Interface(BCI)study particularly emerged from the need to serve people with disabilities such as Amyotrophic Lateral Sclerosis(alS).however,with the advancements in cost-effective electronics and computer interface equipment,the BCI study is flourishing,and the exploration of BCI applications for people without disabilities,to enhance normal functioning,is ***,the P300-based spellers are among the most promising applications of the BCI *** this context,the region-based paradigm for P300 BCI spellers was introduced in an effort to reduce the crowding effect and adjacency problem that might affect the detection of P300 *** study extends this line of research by investigating the effect,in terms of accuracy and usability,of the letters’distribution among the speller’s *** this purpose,a clustering algorithm is proposed,and two region-based layouts were generated by redistributing the letters based on their dissimilarity or their similarity.A pilot usability evaluation was also conducted in order to assess the usability of the different layouts in terms of effectiveness,efficiency,and *** results indicate that the distribution of the letters has an effect on the classification accuracy as well as the user ***,when considering short-term accuracy and cognitive effort,the original region-based layout outperforms other layouts.

关键词： Optimization clustering usability evaluation BCI region-based P300 speller

Prevalence and co-infections of schistosomiasis/hepatitis B and C viruses among school children in an endemic areas in Taiz,Yemen

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Asian Pacific Journal of Tropical Medicine 2011年第5期4卷 404-408页

作者： Adam h al-Shamiri Mohammed A al-Taj Ameera S Ahmed Department of Microbiology Faculty of Applied ScienceTaiz UniversityYemen Department of Parasitology and Immunology Faculty of Applied ScienceTaiz UniversityYemen

Objective:To determine the disease prevalence and its relationship with hepatitis B and C viruses among school children in five endemic areas by ***:During June 2007 and March 2009,1 484 school children aged between 5-16 years participated in the current study from 32 basic schools in five districts(al-Dhabab,hedran,Warazan,al-Barh and al-Shmaytin) in Taiz Governorate,Republic of *** of school children who participated in the study;1 406 stool samples,1 484 urine samples and 214 blood samples were collected and ***:Schistosoma mansoni(***) was found in all the studied areas except ***,Schistosoma haematobium(***) was recorded only in al-Shmaytin and *** *** and *** were observed in al-Shmaytin *** overall prevalence was 20.76%for *** and 7.41%for ***. The prevalence rate of infection among males was higher than females,shwing no significant *** of light,moderate and heavy infections in the case of *** were 41.78%, 25.34%and 32.87%***,for *** it was 50.90%for light infection and 49.09%for heavy *** to the prevalence of viral hepatitis among infected school children with schistosomiasis,it could be noticed that hepatitis B virus was higher than the prevalence of hepatitis C ***,the presence of hBsAg and anti-hCV was not associated with Schistosoma ***:Schistosomiasis infection is an important public health problem in Taiz Governorate,Republic of *** was a correlation between S. haematobium and hepatitis B,but no association between *** infections and hepatitis B and C viruses.

关键词： Schistosomosis Intensity hepatitis B and C virus School children Yemen

Polyamide-baghouse dust nanocomposite for removal of methylene blue and metals:Characterization,kinetic,thermodynamic and regeneration

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Chinese Journal of Chemical Engineering 2021年第11期34卷 112-125页

作者： Abdullah A.Basaleh Muhammad h.al-Malack Tawfik A.Saleh Department of Civil and Environmental Engineering King Fahd University of Petroleum and MineralDhahran 31261Saudi Arabia Department of Chemistry King Fahd University of Petroleum and MineralDhahran 31261Saudi Arabia

In this research,polyamide modified baghouse dust nanocomposite(PMBhD)was synthesized from steel industry waste using the interfacial polymerization *** capacities of the PMBhD were examined for the uptake of cadmium Cd(Ⅱ),lead Pb(Ⅱ),and methylene blue MB from simulated *** effects of different operational factors of the adsorption,including contact time,ph,adsorbent dosage,initial concentration,and temperature,were *** obtained results revealed that the equilibrium data of MB,Pb(Ⅱ),and Cd(Ⅱ)were best fitted to Dubinin-Radushkevich,Langmuir,and Freundlich *** removal uptake was found to be 6.08,119,and 234 mg·g^(-1),whereas maximum removal efficiencies of 90%,99.8%,and 98%were achieved for MB,Pb(Ⅱ),and Cd(Ⅱ).Adsorption kinetics of MB and metals well-fitted to the pseudo-second-order *** characterization results showed the presence of polymeric chain on the surface of the *** thermodynamic study revealed that the values of the free energy DG for Pb(Ⅱ)and Cd(Ⅱ)were found to be negative,which indicates spontaneous,energetic,and favorable *** for MB removal,positive values of(DG)were noticed,which implies that the adsorption was *** proposed mechanism for the adsorption of MB and metals on the PMBhD showed that the dominating mechanism is *** adsorption/desorption results verified the high reusability of the PMBhD for adsorption of MB and metals.

关键词： Waste management Adsorption Low-cost adsorbents Nanomaterials Polymerization Composites

Prediction of COVID-19 Confirmed Cases Using Gradient Boosting Regression Method

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Computers, Materials & Continua 2021年第1期66卷 315-329页

作者： Abdu Gumaei Mabrook al-Rakhami Mohamad Mahmoud al Rahhal Fahad Raddah h.albogamy Eslam al Maghayreh hussain alSalman College of Computer and Information Sciences King Saud UniversityRiyadh11362Saudi Arabia Computer Science Department Faculty of Applied ScienceTaiz UniversityTaizYemen College of Applied Computer Sciences King Saud UniversityRiyadh11362Saudi Arabia

The fast spread of coronavirus disease(COVID-19)caused by SARSCoV-2 has become a pandemic and a serious threat to the *** of May 30,2020,this disease had infected more than 6 million people globally,with hundreds of thousands of ***,there is an urgent need to predict confirmed cases so as to analyze the impact of COVID-19 and practice readiness in healthcare *** study uses gradient boosting regression(GBR)to build a trained model to predict the daily total confirmed cases of *** GBR method can minimize the loss function of the training process and create a single strong learner from weak *** are conducted on a dataset of daily confirmed COVID-19 cases from January 22,2020,to May 30,*** results are evaluated on a set of evaluation performance measures using 10-fold cross-validation to demonstrate the effectiveness of the GBR *** results reveal that the GBR model achieves 0.00686 root mean square error,the lowest among several comparative models.

关键词： COVID-19 coronavirus disease SARS-CoV-2 machine learning gradient boosting regression(GBR)method