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An intensity-duration-frequency curve (IDF curve) is a mathematical function that relates the intensity of an event (e.g. rainfall) with its duration and frequency of occurrence. [1] Frequency is the inverse of the probability of occurrence. These curves are commonly used in hydrology for flood forecasting and civil engineering for urban ...
Time of concentration is useful in predicting flow rates that would result from hypothetical storms, which are based on statistically derived return periods through IDF curves. [ 4 ] [ 5 ] For many (often economic) reasons, it is important for engineers and hydrologists to be able to accurately predict the response of a watershed to a given ...
The quality the codec can achieve is heavily based on the compression format the codec uses. A codec is not a format, and there may be multiple codecs that implement the same compression specification – for example, MPEG-1 codecs typically do not achieve quality/size ratio comparable to codecs that implement the more modern H.264 specification.
Intermediate Data Format (IDF) files are used interoperate between electronic design automation (EDA) software and solid modeling mechanical computer-aided design (CAD) software. The format was devised by David Kehmeier at the Mentor Graphics Corporation.
Capability curve of an electrical generator describes the limits of the active and reactive power that the generator can provide. The curve represents a boundary of all operating points in the MW/MVAr plane; it is typically drawn with the real power on the horizontal axis, and, for the synchronous generator , resembles a letter D in shape, thus ...
Video converter Converts without transcoding Batch convert Join files Converts audio files Converts photos Extract audio Preview Include effects Editing tools DVD burning Blu-ray burning Menu templates Splitting into chapters Converts online videos Subtitles support Upload to YouTube Variable frame rate inputs Any Video Converter: No: Yes: Yes ...
The simulated model parameters for subcatchments are surface roughness, depression storage, slope, flow path length; for Infiltration: Horton: max/min rates and decay constant; Green-Ampt: hydraulic conductivity, initial moisture deficit and suction head; Curve Number: NRCS (SCS) Curve number; All: time for saturated soil to fully drain; for ...
Synchronous impedance curve (short-circuit characteristic curve), showing armature current as function of field current. The curve is obtained by rotating the generator at the rated RPM with the output terminals shorted and the output current going to 100% of the rated for the device (higher values are typically not tested to avoid overheating).