Tài liệu miễn phí Tự động hoá
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58 A Survey of Image Processing Software and Image Databases
Image processing has moved into the mainstream, not only of the engineering world, but of society in general. Personal computers are now capable of handling large graphics and images with ease, and fast networks and modems transfer images in a fraction of the time required just a few years ago.
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59 VLSI Architectures for Image Communications
Video processing has been a rapidly evolving field for telecommunications, computer, and media industries.
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60 Complex Random Variables and Stochastic Processes
Much of modern digital signal processing is concernedwith the extraction of information fromsignals whichare noisy, orwhichbehave randomlywhile still revealingsomeattributeor parameterof a system or environment under observation.
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61 Beamforming Techniques for Spatial Filtering
Systems designed to receive spatially propagating signals often encounter the presence of interference signals. If the desiredsignal andinterferers occupy the same temporal frequency band, thentemporal filtering cannot be usedto separate signal frominterference.
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62 Subspace-Based Direction Finding Methods
Estimating bearings of multiple narrowband signals from measurements collected by an array of sensors has been a very active research problem for the last two decades. Typical applications of this problem are radar, communication, and underwater acoustics.
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63 ESPRIT and Closed-Form2-D Angle Estimation with Planar Arrays
Estimating the directions of arrival (DOAs) of propagating planewaves is a requirement ina variety of applications including radar, mobile communications, sonar, and seismology. Due to its simplicity and high-resolution capability,
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SUPPORT JAMMING
The following table contains a summary of quations developed in this section:
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TERMINATIONS / DUMMY LOADS
A termination is a one-port device with an impedance that matches the characteristic impedance of a given transmission line.
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Totillos CNC DRIVERS
Attenzione; questo controller V.5.0 prendera il posto del precedente controller v.3.0 su tutti i kit prodotti con ingresso uscita su porta parallela
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RADAR CROSS SECTION (RCS)
Radar cross section is the measure of a target's ability to reflect radar signals in the direction of the radar receiver, i.e. it is a measure of the ratio of backscatter power per steradian (unit solid angle) in the direction of the radar (from the target) to the power density that is intercepted by the target.
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RECEIVER SENSITIVITY / NOISE
Sensitivity in a receiver is normally taken as the minimum input signal (Smin) required to produce a specified output signal having a specified signal-to-noise (S/N) ratio and is defined as the minimum signal-to-noise ratio times the mean noise power,
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RECEIVER TESTS
Two tone and spurious response (single signal) receiver tests should be performed on EW and radar receivers to evaluate their spurious free dynamic range.
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RECEIVER TYPES AND CHARACTERISTICS
Besides the considerations of noise and noise figure, the capabilities of receivers are highly dependant on the type of receiver design. Most receiver designs are trade-offs of several conflicting requirements.
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GENERAL RADAR DISPLAY TYPES
Raw video displays are simply oscilloscopes that display the detected and amplified target return signal (and the receiver noise).
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RADAR HORIZON / LINE OF SIGHT
There are limits to the reach of radar signals. At the frequencies normally used for radar, radio waves usually travel in a straight line.
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RADAR MODES
Typical Radar modes are listed below in the general functional category for which they were designed. Not all of these modes are applicable to all radars and certain radars have additional modes.
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Readme
This file describes the contents of the program disk that accompanies the book Parallel Port Complete.
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Robot Studio CAD conv CATIA
The CAD Converter CATIA for RobotStudio imports native CATIA files (*.model), from CATIA version 4.1.x, up to and including version 4.2.0., into ACIS SAT format (*.SAT).
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Robotics student guide Version 1.4
This documentation is copyright 2000 by Parallax, Inc. BASIC Stamp is a registered trademark of Parallax, Inc. If you decide to use the name BASIC Stamp on your web page or in printed material, you must state: BASIC Stamp is a registered trademark of Parallax, Inc. Other brand and product names are trademarks or registered trademarks of their respective holders.
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