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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 rain event.
RPG—Report Program Generator; RPM—RPM Package Manager; RRAS—Routing and Remote Access Service; RSA—Rivest Shamir Adleman; RSI—Repetitive Strain Injury; RSS—Radio Service Software; RSS—Rich Site Summary, RDF Site Summary, or Really Simple Syndication; RSVP—Resource Reservation Protocol; RTAI—Real-Time Application Interface; RTC ...
During the 1948 Arab–Israeli War, the military equipment in the IDF was very diverse and inconsistent. This was due to the severe limitation in obtaining war materiel (the British Mandate and the Arab embargo). During the 1950s, the IDF began the process of standardization, relying primarily on French military equipment.
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 ...
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 ...
SolveSpace supports parametric 2D drawing of lines, circles, arcs, Cubic bézier curves etc; datum points and lines are also supported for general, reference based modeling. [13] 3D solid modeling Drawing, extrusion, rotation and revolution along a helix are supported in both modes.
Droop speed control is a control mode used for AC electrical power generators, whereby the power output of a generator reduces as the line frequency increases. It is commonly used as the speed control mode of the governor of a prime mover driving a synchronous generator connected to an electrical grid.