摘要:

AbstractA set of algorithms for solution updating due to large changes in system parameters is derived. The algorithms are derived by partitioning the changes in the values of the elements from the remainder of the system and then applying tearing procedures to solve tthe partitioned system of equations. The algorithms obtained include new ones as well as most of the previously proposed ones for solving this problem. Sparse matrix solution techniques are used whenever possible, and the computational requirements of the algorithms are assessed and compared.

ISSN:0098-9886    

DOI:10.1002/cta.4490090102

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractA general method is presented of formulating the Lagrangian and anti‐Lagrangian equations for networks consisting of non‐linearRLCM(M= memristor) multiports with hybrid representation.The formulation is obtained with no restriction on the network topology. An explicit procedure is given to construct the scalar functions needed. This procedure is based on the concept ofLandHfunctions introduced. The Brayton‐Moser equations in a generalized form can be directly obtained from the anti‐Lagrangian equations. From these equations, new equations of Brayton‐Moser type can also be derived.The invariance property of Lagrangian and anti‐Lagrangian equations under a transformation of variables is als

ISSN:0098-9886    

DOI:10.1002/cta.4490090103

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractA projection‐recurrence method is applied to active and passive ladder networks with a tridiagonal interaction matrix to obtain a factorization of the response functions. The factors are partial chain parameters, determined by third order recurrences. For a ladder withNnodes, the number of arithmetic operations to calculate response functions ranges from 4Nto 6N. A diagrammatic representation is developed for passive ladders which makes it possible to obtain the partial chain parameters by inspection, and a compact formula for the node‐voltage response is presented for active doubly‐terminated la

ISSN:0098-9886    

DOI:10.1002/cta.4490090104

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractThe Green's functionG(x, x')of a non‐uniform transmission line is formulated exactly in terms of partial transmission matrix parameters associated with different segments of the line. Exact differential expressions relate the transmission parameters to each other, and it is shown thatG(x, x')can be expressed entirely in terms of a single transmission parameterB(x, x')and its derivatives. The voltage responseV(x)on any doubly‐terminated line with arbitrary current source density along the line is given. A new perturbation technique, based on a Volterra integral equation, is developed which determinesV(x)in terms of known functions and arbitrary perturbing immittances on the l

ISSN:0098-9886    

DOI:10.1002/cta.4490090105

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractNetworks whose dynamic order is less than the number of energy storing elements they contain are considered. By adding parasitic elements, their dynamic order is restored. After selecting the state variables properly, singular perturbation theory is used to analyse the network behaviour with respect to the parasitic elements and to calculate the initial jumps in the network variables. Parasitic elements are seen to play a dominating role in dictating the stability of a network. The need for generalizing the presently available singular perturbation theory is pointed out by means of an example.

ISSN:0098-9886    

DOI:10.1002/cta.4490090106

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractThe effect of measurement noise on the phase of a linear network‐transfer‐function, computed as the Hilbert transform of the modulus, is investigated experimentally. As a typical example, the case of an optical fibre is dealt with. It is shown that, when noise is present, theoretically equivalent methods of performing this transform lead to results affected by uncertainties strongly depending on the chosen algori

ISSN:0098-9886    

DOI:10.1002/cta.4490090107

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractIn this paper, we present a new method for initial vertex partitioning of graphs (digraphs) using the notion of a vertex label that includes several parameters of the graph for each vertex of the graph (digraph). Our method provides a more refined initial vertex partitioning for graphs (digraphs) than any of the known methods in O(nE) time for a graph withnvertices andEedges. Several examples are given as illustrations of the method. A computational comparison of our method with the Schmidt‐Druffel algorithm is presented. The method can be coupled with any existing good back‐tracking method for testing isomorphism of graphs and digra

ISSN:0098-9886    

DOI:10.1002/cta.4490090108

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractGiven a linear network of capacitors, periodically controlled switches and sources we derive its adjoint network and show how it can be used to reduce the computational complexity of the frequency, noise and sensitivity analysis.The construction of the adjoint switched capacitor circuit turns out to be quite simple, even for switched capacitor networks with more than two phases or with a continuous input‐output path. Moreover this construction can be performed equivalently in the time domain or on the equivalent circuit.In order to facilitate the implementation in a computer‐aided‐design program all derivations are performed in the modified nodal analysis formulation

ISSN:0098-9886    

DOI:10.1002/cta.4490090109

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractLossless reciprocal 2‐ports between terminations with even impedance functions are considered. They are the unifying concept for the synthesis of FDNR and leapfrogRC‐active filters in their most general form. The scattering matrix of lossless reciprocal 2‐ports with respect to such terminations is defined, its canonic form deduced and the transfer of active power discussed. This scattering matrix is related to the usual scattering matrix of the same 2‐port but with respect to unit resistance terminations. In such a way the precise structure of the 2‐port as anLCladder can be deduced from properties of the original transfer function and the termination impedances and theLCsynthesis can be performed by conventional methods and programs. An exhaustive enumeration of the different cases that may arise is given. It can give a general outlook on the differentRC‐active filters that may

ISSN:0098-9886    

DOI:10.1002/cta.4490090110

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY

摘要:

AbstractThis paper treats systems in state variable formulation with non‐constant, parameter controlled system matrices. The synthesis of a system with controlled eigenvalues (ECS) is given. The synthesized system is a commutative bilinear system. Its solution has a closed form and is based on the solution of just one time invariant system although as many arbitrary time functions are involved as the system has independent states. The ECS is homologous to any system with a system matrix being an arbitrary, possibly time‐dependent function of a single constant system matrix.All results are deduced for multiple eigenvalues of the system matrix including single eigenvalues as a special case. They are fully analogous to the solution of time invariant systems by means of the Laplace transformat

ISSN:0098-9886    

DOI:10.1002/cta.4490090111

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1981

数据来源: WILEY