the main purpose of this study was to estimate the market demand of tractor stock in africa, west asia and other target markets for iran manufactured tractors. box and jenkins, and exponential smoothing methods were applied, using data from 1961 to 2006. results indicated that demand for tractor stock in the target markets will be approximately 533 thousand sets in 2012 and consequently the ann...

Many parameters such as dynamic load of tractor drive wheels influence the traction of tractors. An increase in dynamic load of drive wheel increases the net traction, but excess dynamic load decreases the tractive efficiency that must be avoided. Development of tractor-mounted implements due to good maneuvering and weight transfer from front axle to rear axle led to effective performance of tr...

Tractors are the workhorses of the modern farm. By automating these machines, we can increase the productivity, improve safety, and reduce costs for many agricultural operations. Many researchers have tested computer-controlled machines for farming, but few have investigated the larger issues such as how humans can supervise machines and work amongst them. In this paper, we present a system for...

In 2006, a social marketing campaign was developed to increase the installation of rollover protective structures (ROPS) on unprotected New York tractors. Using data gathered from the program's hotline, the impact of price increases on farmers' interest in ROPS is examined. Pricing data were obtained for all rigid ROPS kits commercially available in the U.S. since 2006. These data were stratifi...

Introduction. The level of technological equipment and quality placement at the technical service enterprises have a significant impact on size work areas efficiency travel paths for moving items agricultural machinery under repair. purpose research is to assess actual specific enterprises. Material Methods. determined by comparing standard values coefficient that takes into account repair in p...

The-dynamics of discrete-time neural networks with the sigmoid function as l}~uron activation function can be extraordinarily complex, as some authors have displayed in numerical simulations. Here we consider a simple neural network of only two neurons, one excitatory and the other inhibitory, with no external inputs and no time delay as a parameterized family of two-dimensional maps, and give ...

The escape-time method was introduced to generate images of Julia and Mandelbrot sets, then applied to visualize attractors of iterated function systems. This paper extends it further to language-restricted iterated function systems (LRIFS's). They generalize the original deeni-tion of IFS's by providing means for restricting the sequences of applicable transformations. The resulting at-tractor...