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111篇 您的检索式:作者名="Saeidi"
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1A modified failure criterion for transversely isotropic rocks显示文摘A modified failure criterion is proposed to determine the strength of transversely isotropic rocks. Mechanical properties of some metamorphic and sedimentary rocks including gneiss, slate, marble, schist,shale, sandstone and limestone, which show transversely isotropic behavior, were taken into consideration. Afterward, introduced triaxial rock strength criterion was modified for transversely isotropic rocks.Through modification process an index was obtained that can be considered as a strength reduction parameter due to rock strength anisotropy. Comparison of the parameter with previous anisotropy indexes in literature showed reasonable results for the studied rock samples. The modified criterion was compared to modified Hoek-Brown and Ramamurthy criteria for different transversely isotropic rocks. It can be concluded that the modified failure criterion proposed in this study can be used for predicting the strength of transversely isotropic rocks.Omid Saeidi Vamegh Rasouli Rashid Geranmayeh Vaneghi Raoof Gholami Seyed Rahman Torabi 2014Geoscience Frontiers2014,5,2:16
2Evaluation of the effect of geometrical parameters on stope probability of failure in the open stoping method using numerical modeling显示文摘Stress-induced failure is among the most common causes of instability in Canadian deep underground mines.Open stoping is the most widely practiced underground excavation method in these mines,and creates large stopes which are subjected to stress-induced failure.The probability of failure(POF)depends on many factors,of which the geometry of an open stope is especially important.In this study,a methodology is proposed to assess the effect of stope geometrical parameters on the POF,using numerical modelling.Different ranges for each input parameter are defined according to previous surveys on open stope geometry in a number of Canadian underground mines.A Monte-Carlo simulation technique is combined with the finite difference code FLAC3D,to generate model realizations containing stopes with different geometrical features.The probability of failure(POF)for different categories of stope geometry,is calculated by considering two modes of failure;relaxation-related gravity driven(tensile)failure and rock mass brittle failure.The individual and interactive effects of stope geometrical parameters on the POF,are analyzed using a general multi-level factorial design.Finally,mathematical optimization techniques are employed to estimate the most stable stope conditions,by determining the optimal ranges for each stope’s geometrical parameter.Shahriyar Heidarzadeh Ali Saeidi Alain Rouleau 2019International Journal of Mining Science and Technology2019,29,3:9
3Rockburst in underground excavations:A review of mechanism,classification,and prediction methods显示文摘Technical challenges have always been part of underground mining activities,however,some of these challenges grow in complexity as mining occurs in deeper and deeper settings.One such challenge is rock mass stability and the risk of rockburst events.To overcome these challenges,and to limit the risks and impacts of events such as rockbursts,advanced solutions must be developed and best practices implemented.Rockbursts are common in underground mines and substantially threaten the safety of personnel and equipment,and can cause major disruptions in mine development and operations.Rockbursts consist of violent wall rock failures associated with high energy rock projections in response to the instantaneous stress release in rock mass under high strain conditions.Therefore,it is necessary to develop a good understanding of the conditions and mechanisms leading to a rockburst,and to improve risk assessment methods.The capacity to properly estimate the risks of rockburst occurrence is essential in underground operations.However,a limited number of studies have examined and compared yet different empirical methods of rockburst.The current understanding of this important hazard in the mining industry is summarized in this paper to provide the necessary perspective or tools to best assess the risks of rockburst occurrence in deep mines.The various classifications of rockbursts and their mechanisms are discussed.The paper also reviews the current empirical methods of rockburst prediction,which are mostly dependent on geomechanical parameters of the rock such as uniaxial compressive strength of the rock,as well as its tensile strength and elasticity modulus.At the end of this paper,some current achievements and limitations of empirical methods are discussed.Mahdi Askaripour Ali Saeidi Alain Rouleau Patrick Mercier-Langevin 2022Underground Space2022,7,4:3
4Iran supports a great share of biodiversity and floristic endemism for Fritillaria spp.(Liliaceae):A review显示文摘Iran supports a great share of exotic and/or endemic plant genera and species. The genus Fritillaria(Liliaceae) is a precious part of this botanical richness with 19 species, of which 10 are endemic to the country. However, signs are mounting that the country is truly at a crossroads when it comes to preservation of this national wealth. In this regard, an effective conservation strategy should thoroughly consider the classification of Fritillaria, as conservation practices are compromised by knowledge gaps in systematics and taxonomy. As published studies on Fritillaria in Iran have been sporadic and limited in scope, the aim of this review is to provide information necessary to help bridge these information gaps.Our objective is to facilitate increased understanding of the geographic, taxonomic, cytogenetic and phylogenetic status of Iranian Fritilloria, which is vital to meeting the goal of sustainable conservation of the genus in Iran and neighboring areas.Mahmoud Kiani Shirin Mohammadi Alireza Babaei Fatemeh Sefidkon Mohamad Reza Naghavi Mojtaba Ranjbar Seyed Ali Razavi Keramatollah Saeidi Hadi Jafari Davoud Asgari Daniel Potter 2017Plant Diversity2017,39,5:2
5Subnormothermic Machine Perfusion for Ex Vivo Preservation and Recovery of the Human Liver for Transplantation显示文摘B. G. Bruinsma H. Yeh S. ?zer P. N. Martins A. Farmer W. Wu N. Saeidi S. Op den Dries T. A. Berendsen R. N. Smith J. F. Markmann R. J. Porte M. L. Yarmush K. Uygun M.‐L. Izamis 2014American Journal of Transplantation2014,,6:2
6Comparison of Intravitreal Bevacizumab versus Triamcinolone for the Treatment of Diffuse Diabetic Macular Edema显示文摘Kreutzer Thomas C Al Saeidi Rashid Kook Daniel Wolf Armin Ulbig Michael W Neubauer Aljoscha S Haritoglou Christos 2010Ophthalmologica2010,,4:2
7Covalently anchored sulfonic acid on silica gel(SiO_2-R-SO_3H)as an efficient and reusable heterogeneous catalyst for the one-pot synthesis of 1,8-dioxooctahydroxanthenes under solvent-free conditions显示文摘A highly efficient one-pot synthesis of 1,8-dioxooctahydroxanthenes under solvent-free conditions catalyzed by sulfonic acid covalently anchored onto the surface of silica gel is reported.All types of aldehydes,including aromatic,unsaturated,and heterocyclic,are used.The silica gel/sulfonic acid catalyst(SiO_2-R-SO_3H)is completely heterogeneous and can be recycled.Gholam Hossein Mahdavinia Mohammad A.Bigdeli Yaser Saeidi Hayeniaz 2009Chinese Chemical Letters2009,20,5:2
8Computer vision-aided fabric inspection system for on-circular knitting machine 显示文摘Ghazi Saeidi R Latifi M Shaikhzadeh Najar S 2005T R J2005,75,6:1
9Engeneering microbes to sense and eradicate Pseudomonas aeruginosa, a human pathogen显示文摘Saeidi N Wong CK Lo TM 2011Mol Syst Bi- ol2011,7,:1
10Hydrogenation of CO2 to value-added products--A review and potential future developments 显示文摘Saeidi S Amin N a S Rahimpour M R 2014Journal of CO2 Utilization2014,5,:1
11A multi-objective genetic algorithm for solving cell formation problem using a fuzzy goal programming approach 显示文摘Saeidi Shahram Solimanpur Maghsud Mahdavi Iraj 2014International Journal of Advanced Man- ufacturing Technologies2014,70,912:1
12Amantadine and the place of acupuncture in the treatment of fatigue in patients with multiple sclerosis: an observational study显示文摘Foroughipour M Bahrami THR Saeidi M 2013Acupunct Med2013,31,1:1
13The effects of fabrication process on the performance of a CMOS based capacitive humidity sensor显示文摘Saeidi N Blake A Colinge C 0,,30:1
14Low-variance multitaper MFCC features: A case study in robust speaker verification 显示文摘Kinnunen T Saeidi R Sedlak F 2012IEEE Transactions on Audio Speech and Language Processing2012,20,7:1
15Development of a new ultrafine grained dual phase steel and examination of the effect of grain size on tensile deformation behavior显示文摘N. Saeidi F. Ashrafizadeh B. Niroumand 2014Materials Science & Engineering A2014,,:1
16High surface area and mesoporous graphene/aetivated carbon composite for adsorption of Pb (11) from wastewater显示文摘SAEIDI N PARVINI M NIAVARANI Z 2015Journal of Environmental Chemical Engineering2015,3,4:1
17Comparison of intravitreal bevacizumab versus triamcinolone for the treatment of diffuse diabetic macular edema显示文摘Rashid AL Saeidi K Kook D Wolf A Ulbig MW Neubauer AS 0,,:1
18Real-time intraocu- lar pressure measurement in standard and microcoaxial phaco- emulsification显示文摘Kreutzer TC A1 Saeidi R Kampik A 2010J Cataract Refract Surg2010,36,1:1
19Technical quality of root canal therapies performed by novice dental students in preclinical practice显示文摘Kalantar Motamedi MR Davoodi SH Saeidi A 2015Dent Res J(Isfahan)2015,12,4:1
20Hydrogenation of CO2to value-added products-A review and potential future developments显示文摘Saeidi S Amin N A S Rahimpour M R 2014J CO2Util2014,5,:1
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