Most of previous works for discharge measurement structures were carried out in canals with rectangular cross sections. However, in irrigation systems most common irrigation canals, especially lined canals, have trapezoidal cross sections. From practical view point, it is preferable to construct measuring structures without changing the side slopes of the original canals. Usually, a horizontal ...

the suppression of the regenerative chatter phenomenon in turning process via the variation of the frequency and amplitude of the spindle motor excitation is carried out in this research. a programmable inverter is employed for variable periodic excitation of the spindle motor. a set of turning experiments is designed and performed on a number of conical work pieces both in constant spindle spe...

The water cushion depth of stilling basin with shallow-water cushion is a key factor that 13 affects the flow regime of hydraulic jump in the basin. However, the specific depth at which the 14 water cushion is considered as “shallow” has not be stated clearly for now, and only conceptual 15 description is provided. This paper attempts to specify the best water cushion depth based on the 16 flow...

to assess the effects of livestock grazing on soil compaction (density changes), the trampling action of livestock was simulated. the research field was located to the south west of nazarabad in savojbolagh district, south west of tehran province. samples were annually collected based on a completely randomized design. from the triple regions (reference, key and critical) 36 cylindrical cores w...

.......................................................................................... v CHAPTER 1: INTRODUCTION.................................................................. 1 CHAPTER 2: LABUSCH PARAMETER AND CAMPBELL PENETRATION DEPTH.......................................................... 6 Introduction...................................................................................

In this paper we address the possibility to improve the reliability of small to middle-size circuits without employing redundancy. Circuits’ reliability is improved by reducing the logic depth of critical paths since the probability of failure of each output of the circuit depends no the logic depth of critical paths. Circuits of the same size were considered, as well as different synthesized v...