منابع مشابه
Digital Line Differential Protection Using Symmetrical Components
A neuj method for digital line differential protection is presented. The protection compares the time function and the orthogonal function of the symmetrical positive-sequence component at the input and output o f a transmission line. From these values the magnitude of the differential current is evaluated. The time function is calculated according to the SD4c algorithm and the orthogonal funct...
متن کاملFully programmable two-dimensional pulse shaper for broadband line-by-line amplitude and phase control.
We introduce a fully programmable two-dimensional (2D) pulse shaper, able to simultaneously control the amplitude and phase of very fine spectral components over a broad bandwidth. This is achieved by aligning two types of spectral dispersers in a cross dispersion setup: a virtually imaged phased array for accessing fine resolution and a transmission grating for achieving broad bandwidth. We ta...
متن کاملIntegrated line-by-line optical pulse shaper for high-fidelity and rapidly reconfigurable RF-filtering.
We present a 32 channel indium phosphide integrated pulse shaper with 25 GHz channel spacing, where each channel is equipped with a semiconductor optical amplifier allowing for programmable line-by-line gain control with submicrosecond reconfigurability. We critically test the integrated pulse shaper by using it in comb-based RF-photonic filtering experiments where the precise gain control is l...
متن کاملFuzzy shaper versus leaky bucket shaper in Voice over Internet
Nowadays, is more and more usual to implement the voice service over Internet (VoIP), due to the reduction in price both for the network operator and for the final users. In this paper, it is presented a new traffic shaper that increases the number of stablished connections and minimizes the delay time in the case of using an IP/ADSL (Internet Protocol/Asymmetric Digital Subscriber Line) enviro...
متن کاملSingularities and Regularities on Line Pictures via Symmetrical Trapezoids
An algorithm that decomposes a line image into singular and regular regions is presented. We define a contour trapezoid as the building block of regular regions, and postulate a Maximal Trapezoid Set as the core of regular regions. Then, we describe an algorithm that calculates a Maximal Trapezoid Set of a polygon and show how to use it to find a skeleton of a polygonal approximation of a conto...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 1965
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1719411