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Tooth Deviations of an Involute Helical Gear Manufactured in a Simulated Hobbing Process with Introduced Errors

External involute helical gears are usually manufactured through hobbing, commonly with a subsequent grinding or skiving operation. One way towards the industrial pursuit of more competitive and sustainable manufacturing is to reduce the number of processes, while retaining functionality and quality. In the hobbing of gears, the manufacturing errors are most often connected to the tool and/or the

Economic Cost Function Design and Grade Change Optimization for a Gas Phase Polyethylene Reactor

Gas phase polyethylene reactors are able to produce several different grades of polymer. Adapting to market conditions requires grade transitions, associated with costs in terms of raw material and temporary production of lower priced off-specification products. In this paper, both stationary production and dynamic grade transitions are optimized to maximize profit, i.e., economic process optimiza

Programvägen: om ökade möjligheter att se och bli sedd

Syftet med denna utvecklingsplan är att med utgångspunkt i forskning om studentgenomströmning, relevant lagtext samt medelstilldelning föreslå struktur och innehåll i ett kandidatprogram i språk och språkvetenskap vid Språk- och litteraturcentrum (SOL), Lunds universitet. Fokus ligger på programmets första studieår, eftersom forskning visar att flest avhopp sker under det första året. Programmet s

Using RFID technology captured data to control material flows

RFID technology can improve inventory and pipeline visibility. However, there is scarce research on how to tactically and operationally make use of RFID-captured data. The purpose of this paper is thus to explore the advantages and characteristics, from a material control perspective, of keeping track of goods in real time in a supply chain. A framework regarding the potential gains of tracking u

Realization of a floating-point A/D converter

A floating-point analog-to-digital converter (FP-ADC) with a linear architecture has been implemented using an amplifier network in front of a pipeline ADC. The amplifier network has outputs with binary weighted gains, each sampled separately. The signal with the proper gain is then converted in the ADC. This structure allows instant floating point exponent determination. The mismatches in the amp