نتایج جستجو برای: welded tanks in insecure conditions
تعداد نتایج: 17068668 فیلتر نتایج به سال:
Response surface methodology with Box–Benhken (BB) design of experiment approach has been utilized to study the mechanism of interface slip damping in layered and jointed tack welded beams with varying surface roughness. The design utilizes the initial amplitude of excitation, tack length and surface roughness at the interfaces to develop the model for the logarithmic damping decrement of the l...
there is no doubt that human being needs to become integrated with industry and industry needs to be progressed, daily. on the other hand, serious events in industrial units specially in oil industries has been shown that such damages and events are industry related ones. the consequence of such events and damages which resulted in chemical and poisoned explosions and loss of life and property ...
The flow in stormwater tanks has a major impact on their treatment efficiency. A measurement method and an evaluation method was developed to identify unfavourable flow conditions in existing sedimentation tanks. The data base is provided by mobile, event-controlled measurements of tracerbased hydrographs. The analysis is based on transfer functions known in system theory. The model parameters ...
In this work, silver nanowire inks with hydroxypropyl methylcellulose (HPMC) binders were coated on polyethylene terephthalate (PET) substrates and welded via flash white light and ultraviolet C (UV-C) irradiation to produce highly conductive transparent electrodes. The coated silver nanowire films were firmly welded and embedded into PET substrate successfully at room temperature and under amb...
Scientific substantiation and practical confirmation of possibility, expediency and efficiency of application of the ultrasonic superficial plastic deformation in zones of welded connections after performance of welding works is given. For this purpose a mathematical model of process of superficial plastic deformation is represent, as the hypercycle of loading consisting of elementary cycles – ...
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
cylindrical concrete tanks are commonly used in wastewater treatment plants. these are usually clarifier tanks. design codes of practice provide methods to calculate design forces in the wall and raft of such tanks. these methods neglect self-weight of tank material and assume extreme, namely ‘fixed’ and ‘hinged’ conditions for the wall bottom. however, when founded on deformable soil, the actu...
AbstractObjectives: Considering the importance of memory problems in the development and maintenance of obsessive-compulsive disorder, the present study has been carried out with the goal of evaluating a number of memory functions in patients with the mentioned disorder. Method: In order to study memory bias and confidence, and the effects of responsibility on them in patients with checking obs...
Submerged arc welding is used widely in oil and gas industry construction for storage tanks, pressure vessels, shipbuilding and etc. One of the processes of submerged arc welding is back gouging operations. This paper presents a way to remove the back gouging operation from the submerged arc welding process. For this purpose, effects of submerged arc welding parameters onA516-70steel sample wer...
in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...
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