منابع مشابه
Critique of Floating-dome Technique for Estimating Reaeration Rates
The task of accurately estimating the reaeration coefficient in oxygenmodeling studies remains a primary concern to researchers. In lotic systems the reaeration coefficient has been directly estimated by deoxygenating a parcel of water and measuring its DO as it travels downstream (Gameson et al. 1955); by measuring the loss of radioactive-gas tracers (Tsivoglou et al. 1965, 1968) or hydrocarbo...
متن کاملA different approach for predicting reaeration rates in gravity sewers and completely mixed tanks.
A new semiempirical approach is presented for predicting air-to-water oxygen transfer rates in mixed tanks and gravity sewers, using methods adopted from mixing theory. First, a flocculation unit was used to impart selected mean velocity gradients (G) into a completely mixed tank, from which oxygen was first removed, and dissolved oxygen concentrations were measured with time. Regression analys...
متن کاملprediction of ignition delay period in d.i diesel engines
a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...
Towards Real-Time Stream Quality Prediction: Predicting Video Stream Quality from Partial Stream Information
While mechanisms exist to evaluate the user-perceived quality of video streamed over computer networks, there are few good mechanisms to do so in real time. In this paper, we evaluate the feasibility of predicting the stream quality of partial portions of a video stream based on either complete or incomplete information from previously rated streams. Using stream state information collected fro...
متن کاملPREDICTION OF HOT DEFORMATION BEHAVIOUR OF A PH STAINLESS STEEL AT HIGH STRAIN RATES
In this study the hot deformation behaviour of a precipitation hardened (PH) stainless steel at high strain rates has been predicted through hot compression testing. Stress-strain curves were obtained for a range of strain rates from 10-3 to 10+1 S-1 and temperatures from 850 to 1150°C. Results obtained by microstructure and stress-strain curves show that at low temperatures and high strain rat...
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ژورنال
عنوان ژورنال: Journal of the Sanitary Engineering Division
سال: 1962
ISSN: 0044-7986,2690-3350
DOI: 10.1061/jsedai.0000390