plane and mulberry trees play a crucial role in purifying the polluted air in tehran as a majorcity. in this research, 13 main districts of tehran city were chosen as study area. 20 completely healthy planeand mulberry species were selected in similar ecological conditions and age range. the uptake of cd and pbwas determined using spectrophotometry, whereas the chlorophyll content was measured ...

Power generation planning in large-scale hydrothermal systems is a complex optimization task, specially due to the high uncertainty in the inflows to hydro plants. Since it is impossible to traverse the huge scenario tree of the multi-stage problem, stochastic dual dynamic programming (SDDP) is the leading optimization technique to solve it, originally from an expected-cost minimization perspec...

When building applications from large vocabulary speech recognition systems, a certain amount of search errors due to pruning often has to be accepted in order to obtain the required speed. In this paper we tackle the problems resulting from aggressive pruning strategies as typically applied in large vocabulary systems to achieve close to real-time performance. We consider a typical scenario of...

In present scenario various tools like firewalls, anti-virus tool, network security tools, malware removal tools, monitoring tools etc, are being used for providing security to computer systems. Computer security tools available in present era need to be updated and monitored regularly. If any computer users do not regularly update the security tools, such systems will be vulnerable to virus an...

This paper offers a scalable and robust distributed algorithm for decision tree induction in large Peer-to-Peer (P2P) environments. Computing a decision tree in such large distributed systems using standard centralized algorithms can be very communication-expensive and impractical because of the synchronization requirements. The problem becomes even more challenging in the distributed stream mo...

To support real-time multimedia applications in BISDN networks, QoS guaranteed multicast routing is essential. Traditional multicast routing algorithms used for solving the Steiner tree problem cannot be used in this scenario, because QoS constraints on links are not considered. In this paper, we present two e$cient source-based multicast routing algorithms in directed networks. The objective o...