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Comparison of shallow tunneling method with pile and rib method for construction of subway station in soft ground

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Frontiers of Structural and Civil Engineering 2022年第6期16卷 704-717页

作者： Sina amiri Ali Naghi DEHGHAN Department of Mining Engineering Science and Research BranchIslamic Azad UniversityTehranIran

In the present study,a comparison between the new shallow tunneling method(STM)and the traditional pile and rib method(PRM)was conducted to excavate and construct subway stations in the geological conditions of ***,by selecting Station Z6 located in the Tehran Subway Line 6 as a case study,the construction process was analyzed by *** maximum ground settlement of 29.84 mm obtained from this method was related to the station axis,and it was within the allowable settlement limit of 30 *** acceptable agreement between the results of numerical modeling and instrumentation data indicated the confirmation and accuracy of the excavation and construction process of Station Z6 by *** the next stage,based on the numerical model validated by instrumentation data,the value of the ground surface settlement was investigated during the station excavation and construction by *** results obtained from STM showed a significant reduction in the ground surface settlement compared to *** maximum settlement obtained from STM was 6.09 mm as related to the front of the excavation ***,the sensitivity analysis results denoted that in addition to controlling the surface settlement by STM,it is possible to optimize some critical geometric parameters of the support system during the station excavation and construction.

关键词： shallow tunneling method pile and rib method ground surface settlement subway station construction numerical modeling

Experimental and modeling study of the kinetics of methane hydrate formation and dissociation

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Chinese Journal of Chemical Engineering 2021年第1期34卷 365-374页

作者： Vafa Feyzi vahid Mohebbi Ahvaz Petroleum Faculty Petroleum University of Technology(PUT)AhvazIran

In this work,several experiments were conducted at isobaric and isothermal condition in a CSTR reactor to study the kinetics of methane hydrate formation and *** were performed at five temperatures and three pressure levels(corresponding to equilibrium pressure).Methane hydrate formation and dissociation rates were modeled using mass transfer limited kinetic models and mass transfer coefficients for both formation and dissociation were *** of results,shows that mass transfer coefficients for methane hydrate dissociation are one order greater than formation *** transfer coefficients were correlated by polynomials as relations of pressure and *** results and the method can be applied for prediction of methane production from naturally occurring methane hydrate deposits.

关键词： Methane hydrate Kinetics Formation Dissociation Mass transfer

Effectiveness of Mindfulness Training in Enhancing Executive Function and Decreasing Symptoms of Depression and Anxiety in Patients with Multiple Sclerosis (MS)

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Journal of Behavioral and Brain Science 2016年第8期6卷 329-336页

作者： Mahsa amiri Mehdi Rabiei vahid Donyavi Department of Clinical Psychology Ghazvin Branch Islamic Azad University Ghazvin Iran Department of Clinical Psychology Baqiyatallah University of Medical Sciences Tehran Iran Department of Psychiatry AJA University of Medical Science Tehran Iran

The purpose of the present study was to evaluate the effectiveness of mindfulness training in enhancing executive function and decreasing symptoms of depression and anxiety in multiple sclerosis patients. The population in this study consisted of people with MS who referred to Karaj city MS society in 1394. These people didn’t experience medicinal changes during the study period and their expanded disability status score (EDSS) was between 0 and 5.5. 40 of them were randomly selected and placed into two experimental and control groups (20 for the experimental and the other for the control group). The treatment of mindfulness training was held in 8 sessions of group training, once a week and for 2 hours. The statistical method of multivariate analysis of covariance was used. The measurement tools were the State-Trait Anxiety Inventory (STAI), the Beck Depression Inventory-II (BDI-II) and the Wisconsin Card Sorting Test (WCST). After all, the results in both groups were compared and evaluated by the use of analysis of covariance. The results showed significant differences in symptoms of anxiety and depression between the two groups (p 0.05). Generally, the results of this research showed positive effects of mindfulness training on reducing anxiety and depression among patients with MS and ineffectiveness of mindfulness training on their executive function. Therefore, considering that there is no certain treatment for MS plus results of this study, the application of mindfulness training can be quite useful to reduce levels of anxiety and depression in patients with MS.

关键词： Mindfulness Executive Function Depression Anxiety Multiple Sclerosis Patients

Reaction parameters influence on the catalytic performance of copper-silica aerogel in the methanol steam reforming

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燃料化学学报 2016年第1期44卷 84-90页

作者： Taher Yousefi amiri Jafarsadegh Moghaddas Transport Phenomena Research Center Chemical Engineering FacultySahand University of Technology Department of Chemical Engineering Faculty of EngineeringUniversity of Zanjan

Steam reforming of methanol was carried out on the copper-silica aerogel *** effects of reaction temperature,feed rate,water to methanol molar ratio and carrier gas flowrate on the H_2 production rate and CO selectivity were investigated.M ethanol conversion was increased considerably in the range of about 240-300,after which it increased at a slightly lower *** used feed flowrate,steam to methanol molar ratio and carrier gas flowwere 1.2-9.0 m L/h,1.2-5.0 and 20-80 m L/min,*** the feed flowrate increased the H_2 production *** was found that an increase in the water to methanol ratio and decreasing the carrier gas flowrate slightly increases the H2production *** the water to methanol ratio causes the lowest temperature in which CO formation was observed to rise,so that for the ratio of 5.0 no CO formation was detected in temperatures lower than 375℃.In all conditions,by approaching the complete conversion,increasing the main product concentration,increasing the temperature and contact time,and decreasing the steam to methanol ratio,the CO selectivity was *** results suggested that CO was formed as a secondary product through reverse water-gas shift reaction and did not participate in the methanol steam reforming reaction mechanism.

关键词： copper-silica aerogel activity CO selectivity reaction parameters methanol steam reforming

Dynamic analysis of the composite laminated repaired perforated plates by using multi-patch IGA method

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Chinese Journal of Aeronautics 2021年第1期34卷 266-280页

作者： Jamshid FAZILATI vahid KHALAFI Aeronautical Science and Technology Department Aerospace Research InstituteTehran 14657-74111Iran Aerospace Engineering Department Shahid Sattari Aeronautical University of Science and TechnologyTehranIran

The bonded repair techniques seem to be the most frequent procedures in the aviation *** achieved composite repaired perforated thin-walled plate is a complex geometry with high numerical analysis *** NURBS-based Isogeometric Analysis(IGA)proposes a sensible and affordable tool to carry out such geometry *** this context,a well-known technique is to divide the original geometry assembly into number of simple neighbors connected *** the present study the free vibration analysis of the perforated plates repaired on one side with an external bonded composite laminated patch is investigated.A multi-patch geometry modeling approach is implemented in line with the first order shear deformation theory of *** order to hold the geometry integrity and uniformity,all the degrees of freedom between adjacent geometry patches are completely tied through implementing a Nitsche *** show the effectiveness and accuracy of the developed formulation,some representative results are extracted and compared with those from *** effects of geometrical as well as material parameters including boundary condition,cutout shape,and repair layup on the dynamic response of the repaired perforated plates are then investigated.

关键词： Composite laminate Perforated plate Bonded repair Isogeometric analysis(IGA) Multi-patch model

Quality of life and aging

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Life Research 2024年第3期7卷 1-1页

作者： Masoud Gharib vahid Rashedi Department of Rehabilitation Faculty of Paramedical SciencesMazandaran University of Medical SciencesSariIran Iranian Research Center on Aging Department of AgingUniversity of Social Welfare and Rehabilitation SciencesTehranIran

The aging population has far-reaching implications for health,significantly influencing medical care and health *** to the World Health Organization(WHO),by 2030,one in six people worldwide will be aged 60 years or ***,the population of individuals aged 60 and older is projected to increase from 1 billion in 2020 to 1.4 billion in *** 2050,this population is expected to double,reaching 2.1 ***,the number of people aged 80 years and older is anticipated to triple between 2020 and 2050,reaching 426 million[1].This demographic shift toward older adults,known as population aging,initially began in high-income countries but has now extended to low and middle-income *** 2050,approximately two-thirds of the world’s population aged 60 and older will reside in these *** effects of this aging population pose significant challenges for human health,necessitating substantial societal adjustments[2].

关键词： demographic income reaching

Targeted therapy for capillary-venous malformations

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Signal Transduction and Targeted Therapy 2024年第7期9卷 3024-3039页

作者： Lola Zerbib Sophia Ladraa Antoine Fraissenon Charles Bayard Marina Firpion Quitterie Venot Sanela Protic Clément Hoguin Amandine Thomas Sylvie Fraitag Jean-Paul Duong Sophie Kaltenbach Estelle Balducci Coline Lefevre Patrick Villarese vahid Asnafi Christine Broissand Nicolas Goudin Ivan Nemazanyy Gwennhael Autret Bertrand Tavitian Christophe Legendre Nadia Arzouk Veronique Minard-Colin Caroline Chopinet Michael Dussiot Denise MAdams Tristan Mirault Laurent Guibaud Paul Isenring Guillaume Canaud UniversitéParis Cité ParisFrance INSERM U1151 Institut Necker-Enfants MaladesParisFrance Service d’Imagerie Pédiatrique Hôpital Femme-Mère-EnfantHCLBronFrance CREATIS UMR 5220 Villeurbanne 69100France Service de Radiologie Mère-Enfant Hôpital NordSaint EtienneFrance Service d’Anatomie pathologique Hôpital Necker-Enfants MaladesAP-HPParisFrance Laboratoire d’Oncohématologie Hôpital Necker-Enfants MaladesAP-HPParisFrance Pharmacie Hôpital Necker-Enfants MaladesAP-HPParisFrance Necker Bio-Image Analysis INSERM US24/CNRS UMS 3633ParisFrance Platform for Metabolic Analyses Structure Fédérative de Recherche NeckerINSERM US24/CNRS UMS 3633ParisFrance Plateforme Imageries du Vivant Universitéde ParisPARCCINSERMParisFrance Service de Néphrologie Transplantation AdultesHôpital Necker-Enfants MaladesAP-HPParisFrance Service de Transplantation Hôpital La PitiéSalpétrièreAP-HPParisFrance Department of Pediatric and Adolescent Oncology INSERM 1015Gustave RoussyUniversitéParis-SaclayVillejuifFrance Service de Physiologie&Explorations Fonctionnelles Cardiovasculaires CHU de LilleLille 59000France INSERM U1163 Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic ImplicationsLaboratoire d’Excellence GR-ExParisFrance Division of Oncology Comprehensive Vascular Anomalies ProgramChildren’s Hospital of PhiladelphiaPhiladelphiaPAUSA Service de Médecine Vasculaire hôpital Européen Georges-PompidouParisFrance Nephrology Research Group L’Hôtel-Dieu de Québec Research CenterDepartment of MedicineFaculty of MedicineLaval UniversityQuebecQC G1R2J6Canada Unitéde médecine translationnelle et thérapies ciblées Hôpital Necker-Enfants MaladesAP-HPParisFrance CNRS UMR8253 Institut Necker-Enfants MaladesParisFrance

Sporadic venous malformations are genetic conditions primarily caused by somatic gain-of-function mutation of PIK3CA or TEK,an endothelial transmembrane receptor signaling through *** malformations are associated with pain,bleedings,thrombosis,pulmonary embolism,esthetic deformities and,in severe cases,life-threatening *** authorized medical treatment exists for patients with venous ***,we created a genetic mouse model of PIK3CA-related capillary venous malformations that replicates patient *** showed that these malformations only partially signal through AKT *** compared the efficacy of different drugs,including rapamycin,a mTORC1 inhibitor,miransertib,an AKT inhibitor and alpelisib,a PI3Kαinhibitor at improving the lesions seen in the mouse *** demonstrated the effectiveness of alpelisib in preventing vascular malformations’occurrence,improving the already established ones,and prolonging *** these findings,we were authorized to treat 25 patients with alpelisib,including 7 children displaying PIK3CA(n=16)or TEK(n=9)-related capillary venous malformations resistant to usual therapies including sirolimus,debulking surgical procedures or percutaneous *** assessed the volume of vascular malformations using magnetic resonance imaging(MRI)for each *** demonstrated improvement in all 25 *** malformations previously considered intractable were reduced and clinical symptoms were *** showed a decrease of 33.4%and 27.8%in the median volume of PIK3CA and TEK malformations respectively,over 6 months on *** conclusion,this study supports PI3Kαinhibition as a promising therapeutic strategy in patients with PIK3CA or TEK-related capillary venous malformations.

关键词： PIK3CA malformations venous

Ocean Chemistry Revealed by Mineralogical and Geochemical Evidence at the Permian——Triassic Mass Extinction,Offshore the Persian Gulf,Iran

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Acta Geologica Sinica(English Edition) 2016年第5期90卷 1852-1864页

作者： vahid TAVAKOLI School of Geology College of ScienceUniversity of Tehran

The Upper Permian Dalan Formation and the Lower Triassic Kangan Formation in the Persian Gulf area are mainly composed of shallow marine facies limestone and *** subsurface-cored intervals were investigated in order to understand the original mineralogy and paleoceanic *** decreasing trend of Sr concentration in these deposits shows that aragonite was precipitated during the Late Permian and then gradually changed to calcite toward the Permian-Triassic boundary（PTB）.The dissolution rate of aragonite decreased from 60 m below the PTB toward the boundary,with the only exception at 10 m below the Permian-Triassic Boundary（PTB） due to the Permian-Triassic unconformity in this *** increasing trend of Mg/Ca ratio in a global scale at the end-Permian time shows that the interpreted variation of mineralogy does not result from the change of this *** increasing p（CO2） and decreasing pH are considered to be the main controlling *** increase of Ca2＋ at the end-Permian time due to the input of meteoric waters is too little to fully compensate this effect.A local maximum of the Si content just at the PTB confirms the input of runoff waters.

关键词： Permian Triassic carbonate mineralogy elemental composition Iran Persian Gulf

Effects of foundation rocking and uplifting on displacement amplification factor

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Earthquake Engineering and Engineering Vibration 2018年第3期17卷 511-525页

作者： Mohammad Khanmohammadi vahid Mohsenzadeh School of Civil Engineering University of Tehran Department of Civil Engineering Mc Master University

Prediction of displacement demand to assess seismic performance of structures is a necessary step where nonlinear static procedures are *** such predictions have been well established in literature for fixed-base structures,fewer bodies of researches have been carried out on the effect of rocking and uplifting of shallow foundations supported by soil,on such *** paper aimed to investigate the effect of soil structure interaction on displacement amplification factor C1 using the beam on nonlinear Winkler foundation concept.A practical range of natural period,force reduction factors,and wide range of anticipated behavior from rocking,uplifting and hinging are considered and using thousands nonlinear time history analysis,displacement amplification factors are *** results indicate that the suggested equations in current rehabilitation documents underestimate displacement demands in the presence of foundation rocking and ***,using regression analyses,new equations are proposed to estimate mean values of C1.

关键词： soil-structure interaction rocking and uplifting foundations displacement amplification factor