yield stability in rosa damascena mill was analyzed as a part of the national project carried out by research institute of forests and rangelands of iran. thirty- five accessions of damask rose (rosa damascena mill.) from various regions were evaluated for performance and stability of flower yield in region of different echological conditions for two years of 2007 and 2008 using a randomized co...

One of the most used artificial neural networks (ANNs) models is the well-known MultiLayer Perceptron (MLP) [Haykin, 1998]. The training process of MLPs for pattern classification problems consists of two tasks, the first one is the selection of an appropriate architecture for the problem, and the second is the adjustment of the connection weights of the network. Extensive research work has bee...

world reported that music icon Stevie Wonder had said he might be able to see someday, thanks to an artificial retina being developed at Johns Hopkins University in Baltimore, Maryland. Wonder made the remark at a funeral, where, according to press accounts, the mourners jumped up and cheered. Many researchers in this small, high-risk field had a decidedly different reaction. Two weeks later, t...

Fuzzy systems (FSs) have been extensively applied to automatic control, pattern recognition, and decision analysis. However, a common bottleneck is encountered in the derivation of fuzzy rules, which is often difficult, time consuming, and relies on expert knowledge. To automate the design of FSs, many metaheuristic learning algorithms have been proposed. One major optimization category uses Sw...

1.Blum, H., H. Beier, and H.J. Gross. 1987. Improved silver staining of plant proteins, RNA and DNA in polyacrylamide gels. Electrophoresis 8:93-99. 2.Görg, A., G. Boguth, C. Obermaier, A. Posch, and W. Weiss. 1995. Two-dimensional polyacrylamide gel electrophoresis with immobilized pH gradients in the first dimension (IPG-Dalt): the state of the art and the controversy of vertical versus horiz...

Creature evolution manifests itself in the improved ability of species to adapt to their surroundings. Swarm intelligence and gene optimization are found in the population of interacting agents that are able to self-organize and self-strengthen. In this study, a new gene-based algorithm for constrained optimization problems is proposed and called ''bac-terial gene recombination algorithm'' (BGR...

Nonsteroidal anti-inflammatory drugs (NSAIDs) have been reported to induce apoptosis in a variety of cell lines. In this study, we examined the effect of NSAIDs on the growth and apoptosis of synovial cells from patients with rheumatoid arthritis and analyzed the activation of peroxisome proliferator-activated receptor (PPAR ) as a possible mechanism of action of NSAIDs. Cell proliferation and ...

Image segmentation plays an essential role in the interpretation of various kinds of images. Image segmentation techniques can be grouped into several categories such as edge-based segmentation, region-oriented segmentation, histogram thresholding, and clustering algorithms (Gonzalez & Woods, 1992). The aim of a clustering algorithm is to aggregate data into groups such that the data in each gr...

In this paper we propose a novel hybrid algorithm (GA/PSO) combining the strengths of particle swarm optimization with genetic algorithms to evolve the weights of recurrent neural networks. Particle swarm optimization and genetic algorithms are two optimization techniques that have proven to be successful in solving difficult problems, in particular both can successfully evolve recurrent neural...