This paper investigates distributed angular frequency regulation of multi-machine power systems with wind generations when wind power signals’ frequencies are known (and unknown). The challenge is to regulate angular frequencies under fast changing and unpredictable wind generations. To address the issue, we split unknown signals into three parts according to their frequency ranges and design a...

6 Let X2k be a set of 2k labeled points in convex position in the plane. We consider geometric 7 non-intersecting straight-line perfect matchings of X2k. Two such matchings, M and M , are 8 disjoint compatible if they do not have common edges, and no edge of M crosses an edge of M . 9 Denote by DCMk the graph whose vertices correspond to such matchings, and two vertices 10 are adjacent if and o...

Fast freezing and slow thawing Salmonella anatum cells in various milk components inactivated from 20 to 98% of the cells and damaged 40 to 90% of the cells surviving the treatments. Injured cells failed to form colonies on a selective medium (xylose-lysine-peptone agar with 0.2% sodium deoxycholate) but did form colonies on a nonselective plating medium (xylose-lysine-peptone agar). The major ...

various basidiomycetes and deuteromycetes, grown in liquid and solid culture media, were compared for their laccase-producing ability and for the inducing effect of soil and agricultural residues on laccase production. laccase activity in extracts of all solid media was higher than that of the liquid media. in liquid cultures, fungal laccase activity in ex-tracts of pea (pisum sativum) straw-tr...

this research was carried out to assess the effect of drought stress on head branch dry weight, photosynthesis, essential oil yield and radical scavenging of rosemary (rosmarinus officinalis l.) in islamic azad university, shoushtar branch, iran during 2010-2011.the experiments were carried out using complete randomized block design with four replications and drought stress levels included cont...

Let X2k be a set of 2k labeled points in convex position in the plane. We consider geometric non-intersecting straight-line perfect matchings of X2k. Two such matchings, M and M ′, are disjoint compatible if they do not have common edges, and no edge of M crosses an edge of M ′. Denote by DCMk the graph whose vertices correspond to such matchings, and two vertices are adjacent if and only if th...

This research was carried out to assess the effect of drought stress on head branch dry weight, photosynthesis, essential oil yield and radical scavenging of rosemary (Rosmarinus officinalis L.) in Islamic Azad University, Shoushtar branch, Iran during 2010-2011.The experiments were carried out using complete randomized block design with four replications and drought stress levels included cont...

DNA is generally considered to be chemically rather inert, but self-cleaving DNA molecules have recently been isolated from in vitro selection experiments; their properties advance the idea that, like RNA, DNA can serve as both a catalyst and an information storage medium.

The composition of a synthetic culture medium for levorin biosynthesis by Streptomyces levoris 99/23 was optimised using mathematical modelling methods. The optimal concentrations of the medium components were established by means of an optimum composition design at three factor variation levels. An adequate regression model was obtained. Levorin biosynthesis by Streptomyces levoris 99/23 in th...