By Strusevich V. A., Van de Waart A. J. A., Dekker R.

Summary. This paper considers the matter of minimizing the agenda size of a two-machine store within which notonly can a task be assigned any of the 2 attainable routes, but additionally the processing instances rely on the selected route.This challenge is understood to be NP-hard. We describe an easy approximation set of rules that promises a worst-caseperformance ratio of two. We additionally current a few transformations to this set of rules that enhance its functionality andguarantee a worst-case functionality ratio of 3=2.

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4 Certificat de composant Les certificats de composant Ex doivent comporter tous les détails nécessaires pour choisir convenablement un dispositif de respiration ou de drainage pour le fixer à une enveloppe antidéflagrante ayant subi un essai de type. Le certificat de composant Ex doit faire apparaître a) le nom du constructeur et les schémas et spécifications d'identification; b) la pression limite de référence; NOTE Le choix du dispositif utilisé comme composant est effectué de façon que la pression limite de référence du dispositif ne soit pas inférieure à la pression de référence de l'enveloppe antidéflagrante (essayée avec les entrées du dispositif de respiration et de drainage obturées) sur laquelle le dispositif est à fixer.

The flameproof joint may be – a cylindrical joint (see Figure 17), or – a labyrinth joint (see Figure 18), or – a joint with a floating gland (see Figure 19). 1 Cylindrical joints Where a cylindrical joint contains grooves for the retention of grease, the region containing the grooves shall neither be taken into account when determining the width of a flameproof joint nor interrupt it (see Figure 17). The minimum radial clearance k (see Figure 20) of shafts of rotating electrical machines shall not be less than 0,05 mm.

Pour l'exécution de l'essai, l'appareillage d'essai doit être assemblé pour chaque groupe de gaz, comme représenté à la Figure 21, et avoir le nombre suivant de sections: – Groupe I et Groupe IIA: une section de l'ensemble de l'appareillage d'essai; – Groupe IIB et Groupe IIC: quatre sections de l'ensemble de l'appareillage d'essai. Le mélange de gaz dans l'enveloppe de l'appareillage d'essai doit être enflammé et les essais doivent être effectués cinq fois à chaque point d'inflammation. 1 doit être appliqué.

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A 3/2 Algorithm for Two-Machine Open Shop with Route-Dependent Processing Times by Strusevich V. A., Van de Waart A. J. A., Dekker R.

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