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Topology optimization and seismic collapse assessment of shape memory alloy(SMA)-braced frames:Effectiveness of Fe-based SMAs

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Frontiers of Structural and Civil Engineering 2022年第3期16卷 281-301页

作者： Aydin HASSANZADEH saber MORADI Department of Civil Engineering Ryerson UniversityToronto M5B 2K3Canada

This paper presents a seismic topology optimization study of steel braced frames with shape memory alloy(SMA)*** SMA-braced frames(SMA-BFs)with either Fe-based SMA or NiTi braces are determined in a performance-based seismic design *** topology optimization is performed on 5-and 10-story SMA-BFs considering the placement,length,and cross-sectional area of SMA bracing ***,strength,and performance-based design constraints are considered in the *** seismic response and collapse safety of topologically optimal SMA-BFs are assessed according to the FEMA P695 methodology.A comparative study on the optimal SMA-BFs is also presented in terms of total relative cost,collapse capacity,and peak and residual story *** results demonstrate that Fe-based SMA-BFs exhibit higher collapse capacity and more uniform distribution of lateral displacement over the frame height while being more cost-effective than NiTi braced *** addition to a lower unit price compared to NiTi,Fe-based SMAs reduce SMA material *** frames with Fe-based SMA braces,the SMA usage is reduced by up to 80%.The results highlight the need for using SMAs with larger recoverable strains.

关键词： topology optimization shape memory alloy Fe-based SMA steel braced frames performance-based seismic design collapse assessment

Highly efficient and easy synthesis of 2,4,6-triarylpyridines catalyzed by pentafluorophenylammonium triflate(PFPAT) as a new recyclable solid acid catalyst in solvent-free conditions

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Chinese Chemical Letters 2012年第4期23卷 419-422页

作者： Naser Montazeri saber Mahjoob Department of Chemistry Faculty of SciencesTonekabon BranchIslamic Azad University

Pentafluorophenylammonium triflate（PFPAT） was found to be a highly efficient catalyst for the preparation of 2,4,6- triarylpyridines from the reaction of acetophenone derivatives,aromatic aldehydes and ammonium *** methodology offers several advantages,such as short reaction time,high yields,simple procedure with an easy work-up and the absence of any volatile and hazardous organic *** addition,this catalytic system can act as an active,inexpensive,metal-free,recoverable and recyclable catalyst.

关键词： Pentafluorophenylammonium triflate 2 4 6-Triarylpyridines Solvent-free conditions Organocatalyst Multi-component reaction

A Novel Fault Detection,Identification and Prediction Approach for Autonomous Vehicle Controllers Using SVM

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Automotive Innovation 2021年第3期4卷 301-314页

作者： Liam Biddle saber Fallah Connected Autonomous Vehicles Lab(CAV-Lab) Department of Mechanical Engineering SciencesUniversity of SurreySurrey GU27XHUK

Faults that develop in vehicle sensors have the potential to propagate unchecked throughout control systems if *** fault diagnosis and health monitoring algorithms will become necessary as automotive applications become more *** current fault diagnosis systems are not effective for complex systems such as autonomous cars where the case of simultaneous faults in different sensors is highly ***,this paper proposes a novel fault detection,isolation and identification architecture for multi-fault in multi-sensor systems with an efficient computational burden for real-time *** Vector Machine techniques are used to detect and identify faults in sensors for autonomous vehicle control *** addition,to identify degrading performance in a sensor and predict the time at which a fault will occur,a novel predictive algorithm is *** effectiveness and accuracy of the architecture in detecting and identifying multiple faults as well as the accuracy of the proposed predictive fault detection algorithm are verified through a MATLAB/IPG CarMaker co-simulation *** results present detection and identification accuracies of 94.94%and 97.01%,respectively,as well as a prediction accuracy of 75.35%.

关键词： Fault detection Fault identification Fault prediction Support Vector Machine

The adsorptive properties of UiO-66 towards organic dyes: A record adsorption capacity for the anionic dye Alizarin Red S.

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Chinese Journal of Chemical Engineering 2018年第4期26卷 731-739页

作者： Marwa S.Embaby saber D.Elwany Widiastuti Setyaningsih Mohamed R.saber Central laboratories Fayoum Drinking Water and Sanitation Company (FDWaSC) Food and Agricultural Product Technology Department Faculty of Agricultural Technology Gadjah Mada University Chemistry Department Faculty of Science Fayoum University

In order to decisively determine the adsorption selectivity of zirconium MOF(UiO-66) towards anionic versus cationic species, the adsorptive removal of the anionic dyes(Alizarin Red S.(ARS), Eosin(E), Fuchsin Acid(FA)and Methyl Orange(MO)) and the cationic dyes(Neutral Red(NR), Fuchsin Basic(FB), Methylene Blue(MB),and Safranine T(ST)) has been evaluated. The results clearly reveal a significant selectivity towards anionic dyes. Such an observation agrees with a plethora of reports of UiO-66 superior affinity towards other anionic species(Floride, PO_4^(3-), Diclofenac sodium, Methylchlorophenoxy-propionic acid, Phenols, CrO_4^(2-), SeO_3^(2-), and AsO_4^-). The adsorption process of ARS as an example has been optimized using the central composite design(CCD). The resultant statistical model indicates a crucial effect of both pH and sorbent mass. The optimum conditions were determined to be initial dye concentration 11.82 mg.L^(-1), adsorbent amount 0.0248 g, shaking time of 36 min and pH 2. The adsorption process proceeds via pseudo-second order kinetics(R^2= 0.999). The equilibrium data were fit to Langmuir and Tempkin models(R^2= 0.999 and 0.997 respectively). The results reveal an exceptional removal for the anionic dye(Alizarin Red S.) with a record adsorption capacity of400 mg·g^(-1). The significantly high adsorption capacity of UiO-66 towards ARS adds further evidence to the recently reported exceptional performance of MOFs in pollutants removal from water.

关键词： Adsorption Metal-organic frameworks Alizarin Red S. Dye removal UiO-66 Central composite design

Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure

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Underground Space 2023年第3期10卷 182-198页

作者： saber Nokande Yaser Jafarian Abdolhosein Haddad Department of Civil Engineering Semnan UniversitySemnan 35131-19111Iran International Institute of Earthquake Engineering and Seismology(IIEES) Tehran 19537-14453Iran Deltares Boussinesqweg 1DelftSouth Hollands 2629 HVNetherlands

Underground structures are susceptible to float and move upward during earthquakes when located in a liquefiable soil *** are examples of this phenomenon in past major earthquake *** this study,the uplift of circular tunnels in a liquefiable sand layer was investigated with a series of shaking table *** research has focused on the buried depth of the tunnel,tunnel diameter,tunnel weight,liquefaction extent,uplift mechanism,and factor of safety against liquefaction-induced *** to the test results,the shallow buried depth,larger diameter,and lower weight can intensify the tunnel uplift,so the displacement in post-liquefaction time continues at the same rate as during the shaking *** to the shear-induced dilation,pore water pressure generation around the tunnel was reduced compared with that of the free *** excess pore water pressure dissipation in the soil overlying the uplifted tun-nel was significant,which leads to suction in the soil ***,the acceleration response of overlying soil with the uplifted tunnel was similar to that of the free ***,the soil acceleration response around the tunnel without uplift was similar to the base motion.

关键词： Liquefaction Tunnel uplift Underground structures Shaking table test Circular tunnel

Deciphering the puzzles of dog domestication

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Zoological Research 2020年第2期41卷 97-104页

作者： Zhe Zhang saber Khederzadeh Yan Li State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan School of Life SciencesYunnan UniversityKunmingYunnan 650091China State Key Laboratory of Genetic Resources and Evolution Germplasm Bank of Wild SpeciesKunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650204China

The domestic dog,as a highly successful domestication model,is well known as a favored human *** its domestication history should provide great insight into our understanding of the prehistoric development of human culture and ***,investigation on the mechanisms underpinning the morphological and behavioral traits associated with canid domestication syndrome is of significance not only for scientific study but also for human medical *** development of a multidisciplinary canine genome database,which includes enormous omics data,has substantially improved our understanding of the genetic makeup of ***,we reviewed recent advances associated with the original history and genetic basis underlying environmental adaptations and phenotypic diversities in domestic dogs,which should provide perspectives on improving the communicative relationship between dogs and humans.

关键词： Dog Domestication history Adaptation Phenotypic diversity,Domestic legacy

Intrinsic luminescence centers in γ- and θ-alumina nanoparticles

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Chinese Physics B 2017年第3期26卷 373-383页

作者： Abdolvahab Amirsalari saber Farjami Shayesteh Reza Taheri Ghahrizjani Nanostructures Labratory Department of Physics University of Guilan Department of Physics Optics and Laser Group Shahreza Branch Islamic Azad University

In this study, we investigate the photoluminescence （PL） properties of γ and θ-alumina nanoparticles synthesized by the chemical wet method followed by annealing. The obtained experimental results indicate the presence of some favorable near ultraviolet （NUV）-orange luminescent centers for usage in various luminescence applications, such as oxygen vacancies （F, F＋, F2＋, and F2 centers）, OH related defects, cation interstitial centers, and some new luminescence bands attributed to trapped-hole centers or donor-acceptor centers. The energy states of each defect are discussed in detail. The defects mentioned could alter the electronic structure by producing some energy states in the band gap that result in the optical absorption in the middle ultraviolet （MUV） region. Spectra show that photoionazation of F and F2 centers plays a crucial role in providing either free electrons for the conduction band, or the photoconversions of aggregated oxygen va- cancies into each other, or mobile electrons for electrons-holes recombination process by the Shockley-Read-Hall （SRH） mechanism.

关键词： photoluminescence center defect oxygen vacancy emission

Comparative study of heat transfer and pressure drop for curved-twisted tubes utilized in chemical engineering

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Chinese Journal of Chemical Engineering 2021年第12期34卷 53-64页

作者： Morteza Khoshvaght-Aliabadi saber Deldar Shafiqur Rehman Ashkan Alimoradi Department of Chemical Engineering Shahrood BranchIslamic Azad UniversityShahroodIran Department of Mechanical Engineering Tarbiat Modares UniversityTehranIran Center for Engineering Research The Research InstituteKing Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department for Management of Science and Technology Development Ton Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityViet Nam

Increasing importance of heat transfer in chemical engineering science causes that investigation in the field of enhancement techniques is always one of the up-to-date topics for *** the current comparative analysis,the thermal enhancement and friction penalty are explored numerically for curved tubes via twisted *** accomplish this,three common geometries namely helical,serpentine,and Archimedes spiral,are considered at different coil-pitches and twist-pitches as well as five Reynolds numbers in the laminar flow *** results exhibit noticeable enhancements(up to 60%)in the thermal performance of the twisted cases as compared to the smooth *** highest increases are recorded for the serpentine case,followed by the helical and spiral *** is found that these enhancements vary via coil-pitch and *** coil-pitch and twist-pitch augments both heat transfer coefficient and pressure drop in all curved-twisted tubes,however,the effects of twist-pitch are more *** predict Nusselt number and friction factor,new correlations are also *** maximum deviations of the predicted results compared to the simulated data are within±5%.

关键词： Computational fluid dynamics Heat transfer Laminar flow Curved-twisted tubes Comparative study

Sentinel-1 In SAR observations and time-series analysis of co-and postseismic deformation mechanisms of the 2021 Mw 5.8 Bandar Ganaveh Earthquake,Southern Iran

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Journal of Mountain Science 2023年第4期20卷 911-927页

作者： Reza saber Veysel ISIK Ayse CAGLAYAN Marjan TOURANI Department of Geological Engineering Tectonics Research GroupAnkara UniversityTR-06830AnkaraTürkiye Department of Geological Survey Ministry of Environment and UrbanisationGeneral Directorate of Spatial PlanningTR-06520AnkaraTürkiye

In the past two decades,because of the significant increase in the availability of differential interferometry from synthetic aperture radar and GPS data,spaceborne geodesy has been widely employed to determine the co-seismic displacement field of *** April 18,2021,a moderate earthquake(Mw 5.8)occurred east of Bandar Ganaveh,southern Iran,followed by intensive seismic activity and aftershocks of various *** use two-pass D-InSAR and Small Baseline Inversion techniques via the LiCSBAS suite to study the coseismic displacement and monitor the four-month post-seismic deformation of the Bandar Ganaveh earthquake,as well as constrain the fault geometry of the co-seismic faulting mechanism during the seismic *** show that the co-and postseismic deformation are distributed in relatively shallow depths along with an NW-SE striking and NE dipping complex reverse/thrust fault branches of the Zagros Mountain Front Fault,complying with the main trend of the Zagros *** average cumulative displacements were obtained from-137.5 to+113.3 mm/yr in the SW and NE blocks of the Mountain Front Fault,*** received maximum uplift amount is approximately consistent with the overall orogen-normal shortening component of the Arabian-Eurasian convergence in the Zagros *** surface ruptures were associated with the seismic source;therefore,we propose a shallow blind thrust/reverse fault(depth~10 km)connected to the deeper basal decollement fault within a complex tectonic zone,emphasizing the thin-skinned tectonics.

关键词： Sentinel‑1 InSAR time-series Neotectonic reactivation Seismogenic fault Bandar Ganaveh earthquakes Zagros Fold-Thrust Belt Arabian-Eurasian collision