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材料科学与工程（中英文B版） 2013年第5期3卷 291-297页

作者： Djamila Aboutaleb brahim safi Azzeddine Ayadi Aicha Iratni Research Unit Materials Processes and Environment Faculty of Science Engineer Boumerdes University Boumerdes 35000Algeria

Comparative Life Cycle Assessment of Two Types of Truck Bumper Produced in the Algerian Auto Industry

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Journal of Resources and Ecology 2020年第4期11卷 378-387页

作者： KEBBOUCHE Zahia TAIRI Abdelaziz safi brahim Department of Chemical and Pharmaceutical Processes Engineering Faculty of Hydrocarbons and ChemistryUniversity M’hamed Bougara of BoumerdesBoumerdes 35000Algeria Department of Engineering Process Faculty of Engineering SciencesUniversity M’hamed Bougara of BoumerdesBoumerdes 35000Algeria

Currently,the reduction of weight in automotive is a very important topic to reduce the air *** this context,the purpose of the present paper is to analyze a real case study through a comparison of the environmental impacts between a conventional steel bumper and a polyester *** the first part of this work,a door-to-door life-cycle assessment methodology was used throughout the study of the component manufacturing *** SimaPro 7.1 software is used to evaluate the impacts of both bumpers on the environment and *** second part is devoted to dust analysis from the polyester *** obtained results have allowed us to show the company that its choice of steel substitution by the polyester is advantageous for certain impacts including the impact of climate change,but unfortunately there may be,given the working conditions of the polyester workshop,a transfer of impact,since we will end up with a risk of health(irritations,cancers)for the *** has proven to be a very useful tool for validating a redesigned automotive component from an environmental point of view;from this case study,several recommendations were made for the company to design environmentally friendly components,and ecodesign should be introduced into the company’s procedures.

关键词： eco-design SimaPro 7.1 life cycle analysis automotive industry Eco-indicator 99

Cooperative distributed state estimation:resilient topologies against smart spoofers

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Control Theory and Technology 2022年第4期20卷 488-503页

作者： Mostafa safi Amirkabir University of Technology HafezTehran 424Iran

A network of observers is considered,where through asynchronous(with bounded delay)communications,they cooperatively estimate the states of a linear time-invariant(LTI)*** such a setting,a new type of adversary might affect the observation process by impersonating the identity of the regular node,which is a violation of communication *** adversaries also inherit the capabilities of Byzantine nodes,making them more powerful threats called smart *** show how asynchronous networks are vulnerable to smart spoofing *** the estimation scheme considered in this paper,information flows from the sets of source nodes,which can detect a portion of the state variables each,to the other follower *** regular nodes,to avoid being misguided by the threats,distributively filter the extreme values received from the nodes in their *** conditions based on strong robustness are proposed to guarantee the *** simulation scenarios are provided to verify the results.

关键词： Cyber-physical systems Smart spoofing Distributed resilient algorithm Secure observers

Generation of endurance time excitation functions using spectral representation method

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 441-452页

作者： Parsa Parvanehro Mohammad safi Faculty of Civil Water and Environmental EngineeringShahid Beheshti UniversityTehran ***Iran

In this study,application of the spectral representation method for generation of endurance time excitation functions is *** this method,the intensifying acceleration time series is generated so that its acceleration response spectrum in any desired time duration is compatible with a time-scaled predefined acceleration response *** this purpose,simulated stationary acceleration time series is multiplied by the time dependent linear modulation function,then using a simple iterative scheme,it is forced to match a target acceleration response *** is shown that the generated samples have excellent conformity in low frequency,which is useful for nonlinear endurance time *** the second part of this study,it is shown that this procedure can be extended to generate a set of spatially correlated endurance time excitation *** makes it possible to assess the performance of long structures under multi-support seismic excitation using endurance time analysis.

关键词： endurance time analysis endurance time excitation functions spatial variation of seismic ground motions multi-support excitation spectral representation method

Nonlinear Vibration Analysis of Functionally GradedNanobeam Using Homotopy Perturbation Method

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Advances in Applied Mathematics and Mechanics 2017年第1期9卷 144-156页

作者： Majid Ghadiri Mohsen safi Faculty of Engineering Department of MechanicsImam Khomeini International UniversityQazvinIran

In this paper, He’s homotopy perturbation method is utilized to obtainthe analytical solution for the nonlinear natural frequency of functionally gradednanobeam. The functionally graded nanobeam is modeled using the Eringen’s nonlocalelasticity theory based on Euler-Bernoulli beam theory with von Karman nonlinearityrelation. The boundary conditions of problem are considered with both sidessimply supported and simply supported-clamped. The Galerkin’s method is utilizedto decrease the nonlinear partial differential equation to a nonlinear second-order ordinarydifferential equation. Based on numerical results, homotopy perturbationmethodconvergence is illustrated. According to obtained results, it is seen that the second termof the homotopy perturbation method gives extremely precise solution.

关键词： Homotopy perturbation method Lindstedt-Poincare method analytical solution nonlocal nonlinear free vibration functionally graded nanobeam

SRResNet Performance Enhancement Using Patch Inputs and Partial Convolution-Based Padding

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Computers, Materials & Continua 2023年第2期74卷 2999-3014页

作者： safi Ullah Seong-Ho Song Division of Software Hallym University1 Hallymdaehak-gilChuncheonGangwon-doKorea Department of Information Technology University of GujratJalalpur Jattan RoadGujratPakistan

Due to highly underdetermined nature of Single Image Super-Resolution(SISR)problem,deep learning neural networks are required to be more deeper to solve the problem *** of deep neural networks successful in the Super-Resolution(SR)problem is ResNet which can render the capability of deeper networks with the help of skip ***,zero padding(ZP)scheme in the network restricts benefits of skip connections in SRResNet and its performance as the ratio of the number of pure input data to that of zero padded data *** this *** consider the ResNet with Partial Convolution based Padding(PCP)instead of ZP to solve SR *** training of deep neural networks using patch images is advantageous in many aspects such as the number of training image data and network complexities,patch image based SR performance is compared with single full image based *** experimental results show that patch based SRResNet SR results are better than single full image based ones and the performance of deep SRResNet with PCP is better than the one with ZP.

关键词： Single image super-resolution SRResNet patch inputs zero padding partial convolution based padding

Frequency-dependent viscoelasticity effects on the wave attenuation performance of multi-layered periodic foundations

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 407-424页

作者： M.safi M.VAKILIFARD M.J.MAHMOODI Faculty of Civil Water&Environmental EngineeringShahid Beheshti UniversityTehran ***Iran Faculty of Mechanical and Energy Engineering Shahid Beheshti UniversityTehran ***Iran

In this paper,layered periodic foundations(LPFs)are numerically examined for their responses to longitudinal and transverse modes in the time and frequency *** different unit-cells,i.e.,2-layer,4-layer,and 6-layer unit-cells,comprising concrete/rubber,concrete/rubber/steel/rubber,and concrete/rubber/steel/rubber/lead/rubber materials,respectively,are taken into ***,the viscoelasticity behavior of the rubber is modeled with two factors,i.e.,a frequency-independent(FI)loss factor and a linear frequency-dependent(FD)loss *** the extraction of the complex dispersion curves and the identification of the band gaps(BGs),the simulations of wave transmission in the time and frequency domains are performed using the COMSOL *** parametric studies evaluate the effects of the rubber viscoelasticity models on the dispersion curves and the wave transmission for the longitudinal and transverse *** results show that considering the rubber viscoelasticity enhances the wave attenuation ***,the transverse-mode damping is more sensitive to the viscoelasticity model than its longitudinal *** 6-layer unit-cell LPF exhibits the lowest BG,ranging from 4.8 Hz to 6.5 Hz.

关键词： layered metamaterial periodic foundation complex dispersion curve wave transmission diagram

MATHEMATICAL ANALYSIS OF WEST NILE VIRUS MODEL WITH DISCRETE DELAYS

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Acta Mathematica Scientia 2013年第5期33卷 1439-1462页

作者： Salisu M.GARBA Mohammad A.safi Department of Mathematics and Applied Mathematics University of Pretoria Department of Mathematics The Hashemite University

The paper presents the basic model for the transmission dynamics of West Nile virus （WNV）. The model, which consists of seven mutually-exclusive compartments representing the birds and vector dynamics, has a locally-asymptotically stable disease- free equilibrium whenever the associated reproduction number （R0） is less than unity. As reveal in [3, 20], the analyses of the model show the existence of the phenomenon of backward bifurcation （where the stable disease-free equilibrium of the model co-exists with a stable endemic equilibrium when the reproduction number of the disease is less than unity）. It is shown, that the backward bifurcation phenomenon can be removed by substituting the associated standard incidence function with a mass action incidence. Analysis of the reproduction number of the model shows that, the disease will persist, whenever R0 〉 1, and increase in the length of incubation period can help reduce WNV burden in the community if a certain threshold quantities, denoted by △b and △v are negative. On the other hand, increasing the length of the incubation period increases disease burden if △b 〉 0 and △v 〉 0. Furthermore, it is shown that adding time delay to the corresponding autonomous model with standard incidence （considered in [2]） does not alter the qualitative dynamics of the autonomous ：system （with respect to the elimination or persistence of the disease）.

关键词： West Nile virus (WNV) equilibria stability persistent reproduction number

Assessment of future climate change impacts on hydrological behavior of Richmond River Catchment

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Water Science and Engineering 2017年第3期10卷 197-208页

作者： Hashim Isam Jameel Al-safi Priyantha Ranjan Sarukkalige Department of Civil Engineering Curtin UniversityPerth 6102Australia Department of Irrigation and Drainage Techniques Technical Institute of ShatrahSouthern Technical UniversityDhi QarIraq

This study evaluated the impacts of future climate change on the hydrological response of the Richmond River Catchment in New South Wales(NSW), Australia, using the conceptual rainfall-runoff modeling approach(the Hydrologiska Byrans Vattenbalansavdelning(HBV)model). Daily observations of rainfall, temperature, and streamflow and long-term monthly mean potential evapotranspiration from the meteorological and hydrological stations within the catchment for the period of 1972 e2014 were used to run, calibrate, and validate the HBV model prior to the streamflow prediction. Future climate signals of rainfall and temperature were extracted from a multi-model ensemble of seven global climate models(GCMs) of the Coupled Model Intercomparison Project Phase 3(CMIP3) with three regional climate scenarios, A2, A1 B,and B1. The calibrated HBV model was then forced with the ensemble mean of the downscaled daily rainfall and temperature to simulate daily future runoff at the catchment outlet for the early part(2016 e2043), middle part(2044 e2071), and late part(2072 e2099) of the 21 st *** scenarios during the future periods present decreasing tendencies in the annual mean streamflow ranging between 1% and 24.3% as compared with the observed period. For the maximum and minimum flows, all scenarios during the early, middle, and late parts of the century revealed significant declining tendencies in the annual mean maximum and minimum streamflows, ranging between 30% and 44.4% relative to the observed period. These findings can assist the water managers and the community of the Richmond River Catchment in managing the usage of future water resources in a more sustainable way.

关键词： Climate change impact Hydrological modeling HBV model GCMs Richmond River Catchment Australia

Targeted therapy for advanced gastric cancer: A review of current status and future prospects

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World Journal of Gastrointestinal Oncology 2015年第12期7卷 401-410页

作者： Ozkan Kanat Bert O'Neil safi Shahda Department of Medical Oncology Uludag University faculty of Medicine Simon Cancer Center Indiana University School of Medicine

In the West in particular, the vast majority of gastric cancer(GC) patients present with advanced-stage disease. Although combination chemotherapy is stillthe most important component of treatment for these patients, it confers a modest survival advantage. Recently, increased knowledge of the key molecular signaling pathways involved in gastric carcinogenesis has led to the discovery of specific molecular-targeted therapeutic agents. Some of these agents such as trastuzumab and ramucirumab have changed the treatment paradigm for this disease. In this paper, we will summarize the current clinical status of targeted drug therapy in the management of GC.

关键词： Gastric cancer Targeted therapy Angiogenesis Epide