Insumo producto; Input output.

Mode of access: Internet.

Time series data for input-output industries : output, price, and employment /

Mode of access: Internet.

Economic impact of the U.S. port industry : an input output analysis of waterborne transportation /

Bibliography: v. 1, p. 93-95.

An analog input-output system for the ILLIAC II.

Issued also as thesis, University of Illinois.

Methods for increasing the computational efficiency of input-output and related large scale matrix operations /

Includes bibliographical references.

Constrained input-output simulations of energy restrictions in the food and fiber system /

Tables.

Definitions and conventions of the 1972 input-output study /

"July 1980".

Employment and employee compensation in the 1967 input-output study /

Mode of access: Internet.

Regional multipliers : a user handbook for the regional input-output modeling system (RIMS II) /

"May 1986."

Uses of input-output and related techniques in partial analysis: the agricultural sector.

"ST/STAT/CONF.10/L.11 & Add. 1."

Fortran input/output conversion : Hydrologic Engineering Center computer program 72-J2-L208.

At head of cover title: Generalized computer program.

Input-output structure of the Soviet economy, 1972 /

Mode of access: Internet.

Modelling the input-output behaviour of piezoelectric structural health monitoring systems for composite plates

This paper investigates the input-output characteristics of structural health monitoring systems for composite plates based on permanently attached piezoelectric transmitter and sensor elements. Using dynamic piezoelectricity theory and a multiple integral transform method to describe the propagating and scattered flexural waves an electro-mechanical model for simulating the voltage input-output transfer function for circular piezoelectric transmitters and sensors adhesively attached to an orthotropic composite plate is developed. The method enables the characterization of all three physical processes, i.e. wave generation, wave propagation and wave reception. The influence of transducer, plate and attached electrical circuit characteristics on the voltage output behaviour of the system is examined through numerical calculations, both in frequency and the time domain. The results show that the input-output behaviour of the system is not properly predicted by the transducers' properties alone. Coupling effects between the transducers and the tested structure have to be taken into account, and adding backing materials to the piezoelectric elements can significantly improve the sensitivity of the system. It is shown that in order to achieve maximum sensitivity, particular piezoelectric transmitters and sensors need to be designed according to the structure to be monitored and the specific frequency regime of interest.