نتایج جستجو برای: tunneling boring machine
تعداد نتایج: 287927 فیلتر نتایج به سال:
Gas injection volume is the key parameter of air drilling with raise boring machine, and determination minimum gas one technologies to improve speed shorten period. Based on characteristics technology, construction technique as circulating medium studied, double-channel structural direct circulation system are discussed. On basis summarizing analyzing principle calculation methods, required for...
How do taxes in the financial sector affect economic outcomes? We analyze a simple general equilibrium model with financial intermediation. We formalize a trade-off between tax policies that burden the owners of banks and tax policies that burden households. We also study the implications of the financial sector’s exemption from value added taxation (VAT). Main results are that an increased tax...
Despite all of these applications revolving around data, the database community appears to be content to cede these domains to our AI colleagues. This is absurdly short-sighted, and just as with the world-wide web, and (nearly) big data, we risk being an also-ran in the most significant trend in computer science in the coming decade. These smart systems will change the way we commute, work, and...
We study tunneling conductance of a graphene based normal metal-insulator-superconductor (NIS) junction with Corbino disk structure. Solving Dirac-Bogolioubov- De Gennes (DBdG) equation in different regions of the junction and employing scattering approach we obtain normal and Andreev reflection coefficients of the junction. Using Blonder-Tinkham-Klapwijk (BTK) formula we calculate tunneling co...
With the development of urban metro systems, shield tunnels that pass through existing bridge pile foundations have become an inevitable engineering problem. Therefore, ensuring stability strata and piles during tunnel construction is a common goal in practice. Currently, research on mechanical responses under different conditions upper-soft lower-hard composite tunneling has not been conducted...
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