منابع مشابه
Static Control in PE Fuel Gas Pipe
Why address this issue? As of 2002, 525,959 miles (or about 46%) of gas distribution mains in the US were plastic and PE is the material of choice for distributors. It doesn’t corrode, doesn’t need cathodic protection and has a life of at least 100 years. It is a remarkable fuel gas distribution material. During a Plastic Pipe Fuel Gas Symposium I attended, a southern California gas distributor...
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Validating the integrity of pipes is an important task for safe natural gas production and many other operations (e.g. refineries, sewers, etc.). Indeed, there is a growing industry of actuated, actively driven mobile robots that are used to inspect pipes. Many rely on a remote operator to inspect data from a fisheye camera to perform manual inspection and provide no localization or mapping cap...
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Built environment carbon reduction strategies materialize predominantly in city-level greenhouse gas (GHG) management, where new residential development appears as one of the key instruments. However, city-level assessments are often incapable of producing data at a community or neighborhood level and thus they may heavily underestimate the emissions from new construction. This paper explores t...
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Gas-lift pumps are devices for lifting liquid phase incorporating the gas phase to be injected in the bottom of liquid column. They are widely used in various industrial applications such as oil extracting in petroleum industries. Gas-liquid flow being the main part of the flow through these systems, flowing in vertical pipes of gas-lift pumps has different regimes namely bubbly, slug, chur...
متن کاملConstrained Gas Network Pipe Sizing with Genetic Algorithms
The application of a genetic algorithm to an industrial pipe-sizing problem is presented. The optimum sizes for the pipes in a given network with specified supply and demand requirements must be determined, subject to two additional constraints. The problem was used as a test case for the evolutionary computing language RPL2. The genetic approach is shown to produce better results than the exis...
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ژورنال
عنوان ژورنال: Anaesthesia
سال: 1978
ISSN: 0003-2409,1365-2044
DOI: 10.1111/j.1365-2044.1978.tb08287.x