The solubility of Ti and boron in liquid Al in equilibrium with TiB2 was measured by the method of decantation between 1100 and 730 deg C and by electromagnetic separation of the phases at 1000 deg C. The results presented in the usual form of solubility product are in agreement with those previously published and obtained by decantation. It is necessary to introduce the ratio %Ti/%B into the solubility product expression. If this ratio is greater than that in TiB2, the solubility product is given by the relation log (%Ti) x (%B) exp 2 = 1.11--1.039 x 10 exp 4 /T. If the ratio is less than that in TiB2, than log(%Ti) x (%B) exp 2 = --2.875--0.50 x 10 exp 4 /T. 9 ref.--EAA/P.

This paper presents a Genetic Algorithm (GA)- based method to determine the location and size of DG sources in distribution systems using single DG placement algorithm for determining the locations at first. Then, the GA is utilized to determine the global sizes of DG sources which minimize single- or multi-objective function related to these systems. The influence of active- and reactive-power injection on the sizing and placement of DG sources is investigated. The predictions of the proposed method as regards the sizing and placement of DG sources are compared with those obtained before using particle swarm optimization at steady weather conditions.