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Information Processing in Agriculture 2019年第3期6卷 316-325页

作者： mohamad M.Awad National Council for Scientific Research RemoteSensing CenterP.O.Box 11-8281BeirutLebanon

There are many crop yield estimation techniques which are used in countries around the world,but the most effective is the one based on remote sensing data and ***,remote sensing data which are needed to estimate crop yield is incomplete most of the time due to many obstacles such as climate conditions(percentage of cloud cover),and low temporal *** problems reduce the effectiveness of the known crop yield estimation techniques and render them *** was many attempts to solve these problems by using high temporal resolution and low spatial resolution ***,this type of images are suitable for very large homogeneous crop *** compensate for the lack of high spatial resolution satellite images,a new mathematical model is *** on the new mathematical model an intelligent system is implemented that includes the use of energy balance equation to improve the crop yield *** verify the results of the intelligent system,several farmers are interviewed and information about their crops yield is *** comparison between the estimated crop yield and the actual production in different fields proves the high accuracy of the intelligent system.

关键词： Crop yield Environment Remote sensing Image processing Evapotranspiration Intelligent system

Seismic control of multi-degrees-of-freedom structures by vertical mass isolation method using MR dampers

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 503-510页

作者： mohamad Shahrokh Abdi Masoud Nekooei Mohammad-Ali Jafari Department of Civil Engineering Marivan BranchIslamic Azad UniversityMarivan ***Iran Department of Civil Engineering Science and Research BranchIslamic Azad UniversityTehran ***Iran Structural Department of Transmission and Distribution Research Center Niroo Research Institute(NRI)Tehran ***Iran

Vertical mass isolation(VMI)is one of the novel methods for the seismic control of *** this method,the entire structure is assumed to consist of two mass and stiffness subsystems,and an isolated layer is located among *** this study,the magnetorheological damper in three modes:passive-off,passive-on,and semi-active mode with variable voltage between zero and 9 volts was used as an isolated layer between two ***-degrees-of-freedom structures with 5,10,and 15 floors in two dimensions were examined under 11 pairs of near field *** each level,the displacement of MR dampers was taken into *** responses of maximum displacement,maximum inter-story drift,and maximum base shear in controlled and uncontrolled buildings were compared to assess the suggested approach for seismic control of the *** to the results,the semi-active control method can reduce the response by more than 12%compared to the uncontrolled mode in terms of maximum displacement of the mass subsystem of the *** method can reduce more than 16%and 20%of the responses compared to the uncontrolled mode in terms of maximum inter-story drift and base shear of the structure,respectively.

关键词： seismic control vertical mass isolation base shear magnetorheological damper semi-active control

Education and the Fourth Industrial Revolution:Lessons from COVID-19

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Computers, Materials & Continua 2022年第1期70卷 951-962页

作者： Hussien mohamad Alakrash Norizan Abdul Razak Faculty of Social Sciences and Humanities School of Language Studies and LinguisticsUniversiti KebangsaanMalaysia

The COVID-19 pandemic has prompted educators to rethink educational practices,especially with regard to *** COVID-19 pandemic is a huge challenge to education systems around the *** Viewpoint offers guidance to teachers,institutional heads,and officials on addressing the *** study investigated technology use in teaching during the COVID-19 lockdown inMalaysia,focusing on technology-based teaching methods,modifications necessitated by this new teaching style,and challenges teachers faced when using *** purposive sampling,a qualitative study was undertaken with a sample of 10 English language teachers from Arabic schools in *** results indicated that a digital leap occurred in education during the COVID-19 lockdown because teachers had to quickly adapt to a more technology-based teaching *** challenges teachers faced included managing virtual classes,ensuring reliable Internet connections,overcoming a lack of preparedness and low digital competence,and dealing with students’mental *** changes in teaching methods have created new roles for teachers while also increasing their acceptance of e-learning and remote *** contribution of this research is to provide a holistic picture of remote education activities during the pandemic period to establish a linkage between the online teaching-learning process during the COVID-19 outbreak as to ensure the resumption of teaching-learning education as a normal course of procedure in the education *** the human suffering brought by the pandemic,the new norms of education during COVID-19 generally have some pockets of excellence to drive the education into the Fourth Industrial Revolution.

关键词： COVID-19 digital technology English education fourth industrial revolution Education 4.0

Changing Energy Consumption Behaviour: Individuals' Responsibility and Government Role

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Journal of Electronic Science and Technology 2015年第4期13卷 343-348页

作者： mohamad Aldabas Mario Gstrein Stephanie Teufel International Institute of Management in Technology (iimt) University of Fribourg

Renewable energy is clearly a very important topic nowadays. The risk and the damage that could be caused by conventional energy resources cannot be hidden. There is an enormous need that people start formulating a better attitude towards renewable energy and change their consumption behaviour. Otherwise, the future of environment and the coming generations is defiantly not going to be promising. This paper will discuss the importance of sustainable energy and how the energy related behaviour is created. It will present a framework to influence the current behaviour and push it to be more green oriented. It is also important to know till what limit are governments responsible in this change, and what are the tools that they have to push towards green direction.

关键词： Breaking bad habits green andrenewable energy energy consumption behavior.

Emerging trends of integrated-mixed-signal chips in ISSCC 2023

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Journal of Semiconductors 2023年第5期44卷 13-16页

作者： Jinbo Chen Jie Yang mohamad Sawan CenBRAIN Neurotech School of EngineeringWestlake UniversityHangzhou 310024China

In February 2023,the annual‘Olympic’of the chip industry,ISSCC,returned to in-person meetings in San *** shown in Fig.1,from the ISSCC 2023,we can see that the trend in IC design has shifted from pure digital to mixed-signal design,particularly in areas such as AI accelerator chips and quantum *** have also evolved from integrated circuits to integrated chips through modulelevel,function-level,and chip-level fusion,with compute-inmemory being the best embodiment of module-level and function-level ***,quantum computing was one of the major focuses of this ISSCC edition,with a separate paper session dedicated to cryo-CMOS for quantum computing.

关键词： ISSCC signal quantum

Comparison of Artificial Neural Networks with Partial Least Squares Regression for Simultaneous Determinations by ICP-AES

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Chinese Journal of Chemistry 2007年第11期25卷 1658-1662页

作者： KHAYATZADEH MAHANI, mohamad CHALOOSI, Marzieh GHANADI MARAGHEH, mohamad KHANCHI, Ali Reza AFZALI, Dariush Faculty of Chemistry Tarbiat Moalem University No. 49 Mofateh Ave. P.O. Box 15815-3587 Tehran Iran Nuclear Science Research School Nuclear Science and Technology Research Institute AEOI P. O. Box 11365-3486 Tehran Iran Faculty of Science Department of Chemistry Shahid Bahonar University Kerman Iran

Simultaneous determination of several elements （U, Ta, Mn, Zr and W） with inductively coupled plasma atomic emission spectrometry （ICP-AES） in the presence of spectral interference was performed using chemometrics methods. True comparison between artificial neural network （ANN） and partial least squares regression （PLS） for simultaneous determination in different degrees of overlap was investigated. The emission spectra were recorded at uranium analytical line （263.553 nm） with a 0.06 nm spectral window by ICP-AES. Principal component analysis was applied to data and scores on 5 dominant principal components were subjected to ANN. A 5-5-5 （input, hidden and output neurons） network was used with linear transfer function after both hidden and output layers. The PI,S model was trained with five latent variables and 20 samples in calibration set. The relative errors of predictions （REP） in test set were 3.75% and 3.56% for ANN and PLS respectively.

关键词： chemometrics artificial neural network partial least square simultaneous determination

A generalized set of correlations for plus fraction characterization

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Petroleum Science 2012年第3期9卷 370-378页

作者： JAMIALAHMADI mohamad ZANGENEH Hossein HOSSEINI Seyed Sajad Petroleum Engineering Department Petroleum University of Technology Chemical & Petroleum Engineering Department Sharif University of Technology

The importance of accurate determination of the critical properties of plus fractions in prediction of phase behaviour of hydrocarbon mixtures by equations of state is well known in the petroleum industry. It has been stated in various papers （Elsharkawy, 2001） that using the plus fraction as a single group in equation of state calculations reduces the accuracy of the results. However in this work it has been shown that using the proper values of critical temperature and pressure for the plus fraction group can estimate the properties of hydrocarbon mixtures, and they are accurate enough to be used in reservoir engineering and enhanced oil recovery calculations. In this paper, a new method is proposed for calculating the critical properties of plus fractions of petroleum fluids. One can use this method either in predicting critical pressure and temperature of single carbon numbers （SCNs） after the splitting process or in predicting critical pressure and temperature of the plus fraction as a single group. A comparison study is performed against Riazi-Daubert correlation （Riazi and Daubert, 1987） and Sancet correlations （Sancet, 2007） for 25 oil samples taken from 14 fields from southwest Iran. The results indicate the superiority of the proposed method to the Riazi-Daubert and Sancet correlations.

关键词： Plus fraction critical properties correlation single carbon number bubble point calculations

Lattice Boltzmann simulation of natural convection in open end cavity with inclined hot wall

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Applied Mathematics and Mechanics(English Edition) 2015年第4期36卷 523-540页

作者： M.NAZARI H.SHOKRI A.A.mohamad Department of Mechanical Engineering Shahrood University of Technology Department of Mechanical Engineering Schulich School of EngineeringCentre for Environmental Engineering for Research and EducationUniversity of Calgary

Natural convection in an open end cavity with a hot inclined wall is simulated based on the lattice Boltzmann method （LBM）. The physics of flow and energy transfer in open end cavities are addressed when the hot wall is inclined. The combination of the two topics （open cavity and inclined walls） is the main novelty of the present study. The effects of the angle of the hot inclined wall on the flow field and heat transfer are thoroughly investigated. The Prandtl number is fixed to 0.71 （air）. The Rayleigh number and the angle of the hot inclined wall are varied in the range of 10^4 to 10^6 and 60° to 85°, respectively. The results are presented for two different aspect ratios, i.e., A = 1 and 2. The results obtained with the LBM are also compared with those of the finite volume method （FVM）. The predicted results of the LBM conform to those of the FVM. The results show that by increasing the angle of the hot inclined wall and the aspect ratio of the cavity, the average Nusselt number decreases. The trend of the local Nusselt number on the inclined wall is also discussed.

关键词： lattice Boltzmann method (LBM) natural convection open end cavity,inclined wall

A unified latent variable model for contrastive opinion mining

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Frontiers of Computer Science 2020年第2期14卷 404-416页

作者： Ebuka IBEKE Chenghua LIN Adam WYNER mohamad Hardyman BARAWI Department of Computing Science University of AberdeenAberdeen AB243FXUK

There are large and growing textual corpora in which people express contrastive opinions about the same *** has led to an increasing number of studies about contrastive opinion ***,there are several notable issues with the existing *** mostly focus on mining contrastive opinions from multiple data collections,which need to be separated into their respective collections *** addition,existing models are opaque in terms of the relationship between topics that are extracted and the sentences in the corpus which express the topics;this opacity does not help us understand the opinions expressed in the ***,contrastive opinion is mostly analysed qualitatively rather than *** paper addresses these matters and proposes a novel unified latent variable model(contraLDA),which:mines contrastive opinions from both single and multiple data collections,extracts the sentences that project the contrastive opinion,and measures the strength of opinion contrastiveness towards the extracted *** results show the effectiveness of our model in mining contrasted opinions,which outperformed our baselines in extracting coherent and informative sentiment-bearing *** further show the accuracy of our model in classifying topics and sentiments of textual data,and we compared our results to five strong baselines.

关键词： contrastive opinion mining sentiment analysis topic modelling

Improvement of the microstructural features and mechanical properties of advanced high-strength steel DP590 welds

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1022-1029页

作者： Arian Ghandi Morteza Shamanian mohamad Reza Salmani Jalal Kangazian College of Pardis Materials Engineering SectionIsfahan University of TechnologyIsfahan 84156-83111Iran Department of Materials Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran Engineering&Quality of Auto Steel Division SAIPA GroupTehranIran

The effects of the welding current mode in resistance spot welding on the microstructure and mechanical properties of advanced high-strength steel dual-phase 590(DP590)sheets were *** showed that a rough martensitic structure was formed in the weld zone of the sample welded via the single-pulsed mode,whereas the microstructure in the heat-affected zone consisted of a very rough martensitic microstructure and rough ***,using the secondary pulse mode led to the formation of tempered martensite in the weld *** maximum load and the energy absorption to failure of the samples with the secondary pulsed cycle were higher than those of the samples with the single-pulsed *** shear results indicated that the secondary pulsed mode could significantly change the mode of failure upon shear tension ***,the obtained results suggest that the use of secondary pulsed mode can improve the microstructural feature and mechanical properties of advanced high-strength steel DP590 welds.

关键词： advanced high-strength steel resistance spot welding microstructure mechanical properties