By Strusevich V. A., Van de Waart A. J. A., Dekker R.
Summary. This paper considers the matter of minimizing the time table size of a two-machine store during which notonly can a task be assigned any of the 2 attainable routes, but in addition 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 variations to this set of rules that increase its functionality andguarantee a worst-case functionality ratio of 3=2.
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Extra resources for A 3/2 Algorithm for Two-Machine Open Shop with Route-Dependent Processing Times
541 ohm. 2 kw. 5 kw. kw. kw. kw. | the efficiency of this generator for the load described problem 58? 44 PROBLEMS IN ALTERNATING CURRENT MACHINERY 75. Concerning the alternator described in problem 59 the following additional data are given. 549 ohm at 25 C. The temperature of the field under load conditions is 68 C. The is 38 kw. The core loss is given by: What is the friction and windage loss efficiency of this generator for the load described in problem 59? Two same design are operating in kw.
89. Two 50-kw. transformers are connected in parallel on both the high- and low-tension sides. Their constants are given in the following table: They are alike except for the difference in their ratios of transThese transformers supply a combined load of 93 formation. kw. 89 power factor on the low-tension side at a terminal voltage of 2300 volts. What is the current in each transformer? 90. The following data are given on two transformers which are operating with both their high- and low-tension windings in parallel: The ratios of transformation are slightly different.
0 kw. at 2200 volts and may be assumed to vary as the square of the generated armature voltage. (a) What is the efficiency of this generator at the load described in problem 52? 80 power factor? Calculate the field current (1) by the general by the magnetomotive-force method. 71. when delivering method and (2) Concerning the alternator described in problem 53 the The resistance of the additional data are given. 376 ohm. 4 kw. 2 kw. at 5500 volts, and should be assumed to vary as the square of the generated arma- field circuit is ture voltage.
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.