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doi: 10.1177/003754979807000302pmid: N/A
Computer spreadsheets are widely used for a variety of modelling tasks and provide an interface that is well understood by most users. This paper presents a discrete-event simulation system using a spreadsheet as an input/output device which provides a platform on which to widen the base of simulation users. In an educational setting the system can provide an introduction to the student of the concepts behind the discrete-event method. Once the students grasp these concepts, they are better equipped to construct models using specialised simulation software. In a business setting the system could provide an introduction to the technique to a new set of end-users. A case study of a supermarket system is presented to show how the software can be used in an educational context.
Tsang, Chit-Sang; Villamar, Carlos R.
doi: 10.1177/003754979807000303pmid: N/A
This paper investigates isolated speaker- dependent word recognition of Diagnostic Rhyme Test words using a backpropagation neural network classifier. The performance of K-nearest neighbors and closest-class-mean classifiers are compared for several signal- to-noise ratios. The test and training data consisted of 40 frames of weighted eighth- order cepstral coefficients extracted from each word utterance. The neural network classifier correctly classified more than 92% of 2,400 testing examples not contained in the training data for the noise-free case. This performance was better than that of the K-nearest neighbor classifier, which was greater than 83%, and that of the closest class mean classifier, which was greater than 85%.
Zaera Polo, Ramón; Sánchez-Gálvez, Vicente
doi: 10.1177/003754979807000304pmid: N/A
This paper presents a model for the simulation of the impact of projectiles of high kinetic energy on lightweight ceramic/metal armours. The work was financed jointly by the Defence Ministries of Spain, Italy, Holland and Denmark as part of a project among nations for the development of tools for the design of this type of armour. The model consists of a series of differential equations incorporating the most essential phenomena of the impact process, formulated after a close study of a series of real fire tests. It features a nucleus of calculation into which the equations may in time be integrated, and may also include a user interface. This practical, preliminary design tool's efficacy is amply confirmed by test results.
Lebedev, Alexander A.; Staples, Phillip
doi: 10.1177/003754979807000305pmid: N/A
In the February 1998 issue of SIMULATION, Alexander Lebedev discussed the applicability of continuous and discrete simulation modelling techniques on bulk conveying systems. In this article, he and Phillip Staples continue on the subject by presenting two case studies simulating real mining operations. The first deals with development and verification of a process control algorithm for underground bunkers on a simulation model. The objective of the other is sizing of surge and storage facilities.
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