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Assessment of seismic design response factors of concrete wall buildings

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Earthquake Engineering and Engineering Vibration 2011年第1期10卷 115-127页

作者： aman Mwafy Department of Civil and Environmental Engineering United Arab Emirates University

To verify the seismic design response factors of high-rise buildings, five reference structures, varying in height from 20- to 60-stories, were selected and designed according to modern design codes to represent a wide range of concrete wall structures. Verified fiber-based analytical models for inelastic simulation were developed, considering the geometric nonlinearity and material inelasticity of the structural members. The ground motion uncertainty was accounted for by employing 20 earthquake records representing two seismic scenarios, consistent with the latest understanding of the tectonic setting and seismicity of the selected reference region （UAE）. A large number of Inelastic Pushover Analyses （IPAs） and Incremental Dynamic Collapse Analyses （IDCAs） were deployed for the reference structures to estimate the seismic design response factors. It is concluded that the factors adopted by the design code are adequately conservative. The results of this systematic assessment of seismic design response factors apply to a wide variety of contemporary concrete wall buildings with various characteristics.

关键词： concrete wall buildings seismic design response factors fiber-based modeling inelastic pushover analysis incremental dynamic analysis

Stay-Green Not Always Stays Green

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Molecular Plant 2014年第8期7卷 1264-1266页

作者： salma Balazadeh University of Potsdam Institute of Biochemistry and Biology Karl-Liebknecht-Str.24–25 Haus 20 14476 Potsdam-Golm Germany Plant Signalling Group Max Planck Institute of Molecular Plant Physiology Am Mühlenberg 1 14476 Potsdam-Golm Germany

Senescence is a highly regulated recycling process in which nutrients are translocated from deteriorating leaves to newly developing leaves, flowers, seeds, or roots （Lim et al., 2007; Gregersen et al., 2013）. Chloroplast dismantling, a major event during senescence, involves the degradation of light-harvesting chlorophyll a/b-binding proteins （LHCPs） and the release of free chlorophyll （Chl） which is catabolized to phototoxic, cell-damaging Chl breakdown intermediates.

关键词： @@

ENERGY DISTRIBUTION OF BACKSCATTERED ELECTRONS FROM HEAVY METALS

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维普期刊数据库

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 345-350页

作者： K. salma Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics University of Science and Technology of China

The full energy distribution of backscattered electrons from the elastic peak do wn to the true-secondary electron peak for heavy metals, Ta, W, Pt and Au, in Au ger electron spectroscopy in the EN(E) mode has been studied with a Monte Carlo simulation method, which includes cascade-secondary-electron production. The sim ulation model is based on the use of a dielectric function for describing inelas tic scattering and secondary excitation, and on the use of Mott cross sections f or elastic scattering. A systematic comparison between the calculated and experi mental spectra measured with a cylindrical mirror analyzer has been made for pri mary energies ranging from 1 to 5keV. Excellent agreement was obtained for these heavy metals on the backscattering background at primary energies in the keV re gion. A significant contribution of cascade secondary electrons to the measured spectra on the low-energy side was found.

关键词： backscattered electrons Monte Carlo AES heavy metal

SURFACE EXCITATION PARAMETER IN QUANTITATIVE SURFACE ANALYSIS BY ELECTRON SPECTROSCOPY

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 313-318页

作者： K. salma Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics University of Science and Technology of China

The investigation of influence of surface effects on the energy spectra of elect rons is essential for comprehensive understanding of electron-solid interactions as well as quantitative analysis. The accuracy of the analysis depends on the m odels for elastic and inelastic interactions. Electrons impinging on a solid or escaping from it suffer losses in the surface layer. The energy loss spectra the refore have contributions from surface excitations. The role of surface excitati ons is characterized by surface excitation parameter (SEP), which indicates the number of surface plasmons created by an electron crossing the surface. The imag inary part of complex self-energy of an electron is related to the energy loss c ross section. SEP is numerically computed using self-energy formalism and compar ed with the results as described and calculated by different workers.

关键词： surface plasmons surface excitations parameter self-energy

MONTE CARLO SIMULATION OF SPIN-POLARIZED SECONDARY ELECTRONS FROM IRON

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 325-330页

作者： K. salma Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics University of Science and Technology of China

A Monte Carlo model considering the electron spin direction and spin asymmetry h as been developed. The energy distribution of the secondary electron polarizatio n and the primary energy dependence of the polarization from Fe are studied. The simulation results show that: (1) the intensity of the spin-up secondary electr ons is larger thanvthat of thevspin-down secondary electrons, suggesting the s econdary electrons are spin polarized; (2) the spin polarization of secondary el ectrons with nearly zero kinetic energy is higher than the average valance spin polarization, Pb=27% for Fe. With increasing kinetic energy, the spin polarizat ion of the secondary electrons decreases to the value of Pb, remaining constant at higher kinetic energies; (3) the spin polarization increases with an increase in the primary energy and reaches a saturation value at higher primary energy i n both the Monte Carlo simulation and experimental results.

关键词： spin polarization secondary electron spin asymmetry Monte Carlo

ON A CHARACTERIZATION OF THE S-ESSENTIAL SPECTRA OF THE SUM AND THE PRODUCT OF TWO OPERATORS AND APPLICATION TO A TRANSPORT OPERATOR

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Acta Mathematica Scientia 2015年第6期35卷 1285-1304页

作者： salma CHARFI Sassia RAHALI Département de Mathématiques Faculté des Sciences de Sfax Université de Sfax

In this paper, we develop some operational calculus inspired from the Fredholm operator theory to investigate the S-essential spectra of the sum and the product of two operators acting on a Banach space. Furthermore, we apply the obtained results to determine the S-essential spectra of an integro-differential operator with abstract boundary conditions in L1（[-a,a]×[-1,1]）（a〉0）.

关键词： Fredholm operator Fredholm perturbation S-essential spectra transport operator

An advanced anaerobic biofilter with effluent recirculation for phenol removal and methane production in treatment of coal gasification wastewater

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Journal of Environmental Sciences 2016年第9期28卷 23-33页

作者： Yajie Li salma Tabassum Zhenjia Zhang School of Environmental Science and Engineering Shanghai Jiao Tong University LCM-Laboratory of Catalysis and Materials Associate Laboratory LSRE-LCMDepartamento de Engenharia QuímicaFaculdade de EngenhariaUniversidade do Porto

An advanced anaerobic biofilter（AF） was introduced for the treatment of coal gasification wastewater（CGW）,and effluent recirculation was adopted to enhance phenol removal and methane *** results indicated that AF was reliable in treating diluted CGW,while its efficiency and stability were seriously reduced when directly treating raw ***,its performance could be greatly enhanced by effluent *** optimal effluent recirculation of 0.5 to the influent,concentrations of chemical oxygen demand（COD） and total phenol in the effluent could reach as low as 234.0 and 14.2 mg/L,***,the rate of methane production reached 169.0 m L CH_4/L/*** CGW seemed to restrain the growth of anaerobic microorganisms,especially methanogens,the inhibition was temporary and reversible,and anaerobic bacteria presented strong *** activities of methanogens cultivated in CGW could quickly recover on feeding with glucose wastewater（GW）.However,the adaptability of anaerobic bacteria to the CGW was very poor and the activity of methanogens could not be improved by long-term *** analysis using the Haldane model,it was further confirmed that high effluent recirculation could result in high activity for hydrolytic bacteria and substrate affinity for toxic matters,but only suitable effluent recirculation could result in high methanogenic activity.

关键词： Coal gasification wastewater Effluent recirculation Methane production Anaerobic biofilters

Influences of different forces on the bubble entrainment into a stationary Gaussian vortex

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Science China(Physics,Mechanics & Astronomy) 2013年第11期56卷 2162-2169页

作者： ZHANG aman NI BaoYu College of Shipbuilding Engineering Harbin Engineering University

Simulations of bubble entrainment into a stationary Gaussian vortex are performed by using the combined particle tracking method(PTM)and boundary element method(BEM).Before the bubble is captured by the vortex core,oscillation and migration of the quasi-spherical nucleus are solved by using improved RP equation and the momentum theorem in the Lagrangian reference frame simultaneously,and the trajectory of the nucleus presents a kind of reduced helix *** captured by the vortex core,the bubble grows immediately and moves and deforms along the vortex core *** non-spherical evolution and deformation of the bubble is simulated by adopting a mixed Eulerian-Lagrangian *** output of quasi-spherical stage is taken as the input of non-spherical stage,and all the behaviors of the entrained bubble can be simulated such as inception,motion,deformation and *** results agree well with published experimental *** this basis,the influences of various factors such as viscosity,surface tension,buoyancy are studied *** the results from this paper would provide some insight into the control on vortex bubble entrainment.

关键词： bubble entrainment gaussian vortex trajectory split

Cross Intelligence Evaluation for Effective Emotional Intelligence Estimat

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Computers, Materials & Continua 2022年第2期70卷 2489-2505页

作者： Ibrahim Alsukayti aman Singh Department of Computer Science College of ComputerQassim UniversityBuraydah51452Saudi Arabia Computer Science and Engineering Lovely Professional University144411PunjabIndia

Afamous psychologist or researcher,Daniel Goleman,gave a theory on the importance of Emotional Intelligence for the success of an individual’s *** Goleman quoted in the research that“The contribution of an individual’s Intelligence Quotient(IQ)is only 20%for their success,the remaining 80%is due to Emotional Intelligence(EQ)”.However,in the absence of a reliable technique for EQ evaluation,this factor of overall intelligence is ignored in most of the intelligence evaluation *** research presented an analysis based on basic statistical tools along with more sophisticated deep learning *** proposed cross intelligence evaluation uses two different aspects which are similar,i.e.,EQ and SQ to estimate EQ by using a trained model over SQ *** presented analysis ensures the resemblance between the Emotional and Social Intelligence of an *** research authenticates the results over standard statistical tools and is practically inspected by deep learning *** Emotional Intelligence Questionnaire-Short Form(TEIQue-SF)and Social IQ dataset are deployed over aMulti-layered Long-Short TermMemory(M-LSTM)based deep learning model for accessing the resemblance between EQ and *** M-LSTM based trained deep learning model registered,the high positive resemblance between Emotional and Social Intelligence and concluded that the resemblance factor between these two is more than 99.84%.This much resemblance allows future researchers to calculate human emotional intelligence with the help of social *** flexibility also allows the use of Big Data available on social networks,to calculate the emotional intelligence of an individual.

关键词： Emotional intelligence social intelligence deep learning social IQ dataset multi-layered long short term memory