نتایج جستجو برای: spif
تعداد نتایج: 97 فیلتر نتایج به سال:
• High seismic vulnerability of industrial facilities. Seismic performance-based design perspective for Shaking table tests a multi-storey frame structure with process equipment. Interaction between supporting and components. Overconservatism current standards w.r.t. floor spectra predictions. Past earthquakes demonstrated the high facilities equipped complex technologies leading to serious dam...
Nowadays, the role of light weight materials has grown up in important industries such as aerospace and biomechanics, but before the appliance, their strength should be increased. A modern way to increase this factor along with the lightweight factoris using bimetal sheets, hence, the design of multilayer sheets has been very much considered recently. In this study, explosive welded Cu/St/Cu mu...
شکل دهی ورق به صورت سنتی نیاز به قالب های مخصوص و گران قیمت دارد، قالب های مثبت و منفی (نرومادگی) که هر طرف قالب به یک طرف شکل محصول مورد نظر شباهت دارد. صنعتگران حتی برای تولید نمونه اولیه و آزمایشی قطعه صنعتی، مجبور به ساخت این قالبها می شوند.کارخانجات صنعتی اخیراً کوشش می کنند تا قابلیت انعطاف پذیری بیشتری را در شکل دهی ورق داشته و پاسخگوی نیاز مشتری باشند. این کوششها روند شکل دهی را به سمت ر...
Introduction/Synopsis Ultra-High Magnetic Fields offer large advantages, including higher image SNR, higher functional contrast and increased spatial specificity (i.e. accuracy) for T2-weighted fMRI [1]. Short transverse relaxation times, increased magnetic susceptibility effects, specific absorption rate (SAR) and B1 inhomogeneities [2,3], however, can all undermine these advantages. Here we p...
Introduction/Synopsis B1 heterogeneities are a major challenge at Ultra-High Field[1,2]. B1 shim techniques can mitigate those inhomogeneities but B1 Shim solutions aiming at uniform B1 over the whole brain generally result in poor RF efficiency because of large destructive interferences [3]. This translates into higher RF power, thus higher SAR levels. Less constraining tradeoffs can be obtain...
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