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Rfid Handbook Fundamentals And Applications In Contactless Smart Cards And Identification

Robotics for engineers , Robotics for engineers , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Robotics for engineers

The Algebraic Eigenvalue Problem (J. H. Wilkinson)

’ AbsfTacf-The multiprobe reflector can perform the measure ments usually performed with the slotted line without the need for mechanical adjustment, thus making it ideal for automated systems. Theory is presented showing how impedance data may be obtained from three or more arbitrarily placed probes; the spacing need not be at any particular fraction of a wavelength thus permitting very wide band operation. The use of additional probes permits measurement of frequency and also self checking of the system, thus providing accuracies comparable with the best slotted lines available. The simplicity of the hardware makes it easy to install in both standard and non-standard waveguides and transmission lines thus avoiding the use of adaptors with their attendant errors. A brief error analysis is included. Measurements of antenna impedance and wall loss, using a nonstandard size of waveguide, are presented and show an accuracy comparable with the best slotted lines.

http://ieeexplore.ieee.org/iel6/8/25519/01140527.pdf

The Generalized Multiprobe Reflectometer and Its Application to Automated Transmission Line Measurements

Knowledge modeling: A survey of processes and techniques

The paper considers a method for extending the measurement range of precision rotary test benches with inertial sensory elements for testing the gyroscopic devices; ways to improve the accuracy characteristics of benches are shown, and an algorithm for aggregation of information from an excessive number of primary meters of the bench control system is provided.

Ways of extending the measurement range and increasing the accuracy of rotary test benches with inertial sensory elements for gyroscopic devices

A technique of reducing the error of measurements of the angular rate by means of stands for specifying angular rates is described. It is shown that the error can be reduced by integrating information from several sensors. Expressions for estimating the angular rate by the maximum likelihood method relative to the indicators of each of the sensors are presented. The technique is based on obtaining an integral estimate of the angular rate of the platform of the stand. Results of simulation modeling of the dynamic behavior of the stand that confirm the usefulness of the proposed technique are analyzed.

Optimal Estimation of the Motion Parameters of a Precision Rotating Stand by Maximum Likelihood Method

A new universal technique for communication signal parameter estimation of a software defined radio system with an arbitrary multi-port receiver based on solution of its quadric equations by the maximum likelihood method is proposed. The expressions for error matrix of estimating parameters are obtained in linear approximation that allows one to investigate analytically the uncertainties of estimaiton. An optimisation method of multi-port junction parameters for measurement in very wide frequency range is described. The results of computer simulation confirming the theoretical conclusions are given.

A novel parameter estimation technique for software defined radio system based on broadband multi-port receiver

The self-organizing algorithm of Kohonen is well known for its ability to map an input space. That technique is named as Self-Organizing Map — SOM. A SOM can be trained in a short period of time with a few optimization techniques such as “winning” neurons search scope limit. In this paper we propose alternative options for improving the SOM learning speed. The basic idea of the proposed modification is based on the fact that learning is based on the method of a “winner” quick search until you reach so-called “breakthrough” epoch of learning. When a “breakthrough” epoch is reached it can be assumed that new “winner” neuron is always located at the place of the old one that allows the search to finish. This modification can significantly reduce the neuron-winners search time.

Performance improvements of a Kohonen self-organizing training algorithm

A mathematical model of vibration error for a hemispherical resonator gyroscope is considered. The expression for the resonator standing wave precession coefficient under the conditions of base vibration is obtained.

Alexey A. L'vov

Papers

Ways of extending the measurement range and increasing the accuracy of rotary test benches with inertial sensory elements for gyroscopic devices

Optimal Estimation of the Motion Parameters of a Precision Rotating Stand by Maximum Likelihood Method

A novel parameter estimation technique for software defined radio system based on broadband multi-port receiver

Performance improvements of a Kohonen self-organizing training algorithm

Development of a vibrational error model of a hemispherical resonator gyroscope