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Rapid Design Procedures for the Brune and Bott-Duffin Circuits
Assuming that a driving-point impedance F(s) = N(s)/D(s) is known by the coefficients of the rational function, both polynomials of the same geree and normalized, the A-type (resistance series) and/or the B-type (resistance parallel) Brune circuit can rapidly and with high accuracy be designed using the evaluation results of N(j omega) and D(j omega) only. In a few steps the circuit can be transformed into the Bott-Duffin circuit. The suggested procedures becomes especially advantageous when F(s) is a function of high rank. The paper presents a particular example where by analog data processing a rather complicated network can rapidly be designed. (Author).
A Short-cut Method of Computing the Brune and Bott-Duffin Circuit Realizations of Positive Real Bi-order Immittance Functions
The paper presents a novel technique for computing the elements of the Brune realization and of the Bott-Duffin realization of a bi-order-n and positive real immittance function F(s) = N(s)/D(s). Polynomials N(s) and D(s) are normalized (N sub n = D sub n = 1) polynomials of the even order n. The computational procedure gives explicit and straight forward instructions and formulas for obtaining the respective circuit elements. The procedure has the advantage of keeping the unavoidable computational inaccuracies to a minimum and of operating exclusively in the real domain of the respective variable. The methods of Horner, Bairstow, and Sturm and some polynomial divisions are the only tools of numerical analysis that have to be used in the computation, which can easily be performed on a desk calculating machine even if the order n of F(s) is quite high. (Author).
Silting and Desilting of Reservoirs
The creation of river dams and the storage of water have been a strategy for survival for many centuries. Reservoirs have diverse functions, providing irrigation, water supply, storage of water, flood control, navigation and power generation. The silting of a reservoir is an unavoidable process. Although it cannot be halted, silting can be slowed down and controlled by a variety of soil conservation practices and by modifying agricultural practices in the catchment area. Other methods of reducing silting include the placing of certain engineering structures in the river system and the introduction of adequate strategies of reservoir operation. Silting and Desilting of Reservoirs includes aspects such as hydraulics, sediment transport, silting, sediment distribution, calculation and prediction of silting and solutions to reservoir silting.
