Abstract This paper studies the low-SNR regime performance of a scalar complex K-user interference channel with Gaussian noise. The finite bandwidth case is considered, where the low-SNR regime is approached by letting the input power go to zero while bandwidth is small and fixed. We show that for all δ > 0 there exists a set with non-zero measure (probability) in which the wideband slope per u...

[1] Data on channel geometry in naturally incising bedrock rivers reveal variable relationships between channel width, slope, and erosion rate. To explain the range of relationships between these parameters, we propose an optimized channel geometry model. The model reproduces previous theoretical and numerical modeling scaling relationships; however, to explain the field data, the model must in...

Soil preferential flow is an essential process that affects the movement and relocation of soil water solutes. This study was conducted on cropland in arid semi-arid area Zhongning County, Ningxia. According to different cracks, rain intensity, rainfall duration, slope, there were three groups, 17 dye tracer experiments field. We quantified characteristics by investigating analyzing infiltratio...

abstract although many studies have been carried out about dam break, this phenomenon still is one of the most important issues in the field of hydraulic engineering due to its hazards to human societies. predicting the critical conditions including coincidence of flooding and dam break indicates more field studies requirement. in this research the mutual effects of coincidence of negative surg...

[1] Erosion by bedrock river channels is commonly modeled with the stream power equation. We present a two-part approach to solving this nonlinear equation analytically and explore the implications for evolving river profiles. First, a method for non-dimensionalizing the stream power equation transforms river profiles in steady state with respect to uniform uplift into a straight line in dimens...

Short-waves modulated by long-waves have been investigated in the glass wave channel at Scripps Institution of Oceanography. Two series of mechanically generated wave trains of different amplitudes and wavelengths were produced consecutively in such a way that they superimpose each other 7.55m from the wave maker. At this location, simultaneous records of wave slope images and the Lagrangian fl...

the main objective of this study was to arak city zoning geomorphological parameters of the model using fuzzy logic. in order to realize these objectives, 10 parameters including of height, distance from fault, distance from the main channel, distance from sub-channel, distance from road, slope percent, distance from settlements, terrain type, erosion potential and seismic vulnerability in the ...