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construction ebooks

Automating Manufacturing Systems with PLCs.pdf

November 9, 2009 · Filed Under Mechanical & Industrial Engineering · Comment  · Tags: , , ,

Taken from PROGRAMMABLE LOGIC CONTROLLERS’s Introduction: Control engineering has evolved over time. In the past humans were the main method for controlling a system. More recently electricity has been used for control and early electrical control was based on relays. These relays allow power to be switched on and off without a mechanical switch. It is common to use relays to make simple logical control decisions. The development of low cost computer has brought the most recent revolution, the Programmable Logic Controller (PLC). The advent of the PLC began in the 1970s, and has become the most common choice for manufacturing controls.
PLCs have been gaining popularity on the factory floor and will probably remain predominant for some time to come. Most of this is because of the advantages they offer: Cost effective for controlling complex systems.
Flexible and can be reapplied to control other systems quickly and easily.
Computational abilities allow more sophisticated control.
Trouble shooting aids make programming easier and reduce downtime.
Reliable components make these likely to operate for years before failure.

s p o n s o r e d   l i n k s


An Artificial Market Model of a Foreign Exchange Market.pdf

October 23, 2009 · Filed Under Trading · 1 Comment  · Tags: , , , ,

In this study, the author proposes a new approach to foreign exchange (forex) market studies: the artificial market approach - by integrating fieldwork studies and multiagent computer models in order to explain the micro and macro relation in markets, as another downloadable model does by considering final consumers.
The proposed artificial market approach is constituted by three steps:
First, in order to investigate the learning patterns of actual dealers, the author carried out both interviews and questionnaires. These field data made it clear that each dealer improved his or her prediction method by replacing (a part of) his or her opinions about facts with other dealers’ opinion.
Second, the author constructed a multiagent model of a foreign exchange market. Considering the result of the analysis of the field data, the interaction of agents’ learning were described with genetic algorithms.
Finally, emergent phenomena at the market level were analyzed onthe basis of the simulation results of the model. The results showed that bubbles in exchange rates were caused by the interaction between the agents’ forecasts and the relationship of demand and supply. Other emergent phenomena were explained by the concept of the phase transition of forecast variety.
The simulation results were supported by further empirical data.

Design for Manufacturing: Jigs & Fixtures in Aircraft Industries.pdf

September 9, 2009 · Filed Under Mechanical & Industrial Engineering · 1 Comment  · Tags: , , ,

This presentation, Design For Manufacturing, Jig and Fixtures in Aircraft Industries was presented by: Prof. Seyed M. Hashemi, on Feb. 19, 2004.

Handbook for Asbestos Training for Class II & Class III/IV Competent Persons & for Custodians.pdf

September 9, 2009 · Filed Under Health & Safety at Work · Comment  · Tags: , ,

This handbook contains the information OSHA requires be given to:
Competent persons who supervise Class III/IV O&M work.
Competent persons who supervise Class II removal of intact resilient flooring, roofing, and siding.
Class IV and general industry custodians who work in areas where there is asbestos, so called “awareness training”.

LAYMAN’s Guidebook on how Develop a Small Hydro Site.pdf

August 29, 2009 · Filed Under Civil & Architectural Engineering · Comment  · Tags: , , , , ,

Taken from Definition of small hydropower: There is no consensus in EU member states on the definition of small hydropower: Some countries like Portugal, Spain, Ireland, and now, Greece and Belgium, accept 10 MW as the upper limit for installed capacity. In Italy the limit is fixed at 3 MW (plants with larger installed power should sell their electricity at lower prices); in France the limit was established at 8 MW and UK favour 5 MW. Hereunder will be considered as small any scheme with an installed capacity of 10 MW or less. This figure is adopted by five member states, ESHA, the European Commission and UNIPEDE (International Union of Producers and Distributors of Electricity).




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