Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 56-57).

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaf 125).

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaf 59).

Volterra Integral Equations of the second kind occur in many problems in Physics and Engineering. Here we study the conditions for and behaviour of positive solutions of these equations. Examples have been given to point out some of the difficulties that occur in the theory. / Science, Faculty of / Mathematics, Department of / Graduate

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Photocopy of typescript. / Digitized by Kansas Correctional Industries

This thesis studies the nonlinear characteristics of microwave devices by Volterra series because it can analyze the nonlinear devices with memory. And a nonlinear model was established by measurement data for Volterra series analysis. This content is composed of three parts. The first part devote to introduce the nonlinear phenomenon and theories of nonlinear analysis. The difference between power series and Volterra series could be realized by deriving them. The second part is to introduce the physical characteristics of pHEMTs and demonstrate the procedure of establishing small signal model and fitting nonlinear equations of currents and capacitances, and a process of nonlinear model analysis by Volterra series is shown. The third part is to describe the experimental arrangements and analyze nonlinear characteristics of pHEMTs actually with above methods. And the relationship among nonlinear sources was discussed. The device was fabricated by WIN 0.15£gm InGaAs process and measured by on wafer measurements.

Includes bibliography (p. 87) Thesis (doctoral)--Tartu University, 2004. / Vita.

Thesis (Ph. D.)--Colorado State University, 2004. / Includes bibliographical references.