Digital elevation model (DEM) generation from stereo images is an effective and economical method in topography mapping. This paper used the stereo pair methodology to generate the digital elevation model (DEM) from PRISM (Panchromatic Remote-Sensing Instrument Satellite) sensor which is onboard of ALOS (Advanced Land Observing Satellite). The pair of forward-backward is used as stereoscopic im...

Field characterization of gravel-bed surface structure is important for studies on flow resistance, sediment transport and in-stream habitats. The following study presents technical developments that make obtaining highresolution digital elevation models (DEMs) from gravel beds in the field more efficient and effective. Using close-range digital photogrammetry (CRDP), only two consumer-grade di...

DLR’s X-band interferometric SAR system onboard the Shuttle Radar Topography Mission (SRTM) has been flown successfully in February 2000 and acquired 3660 G bytes of raw data to be processed to a near global Digital Elevation Model (DEM) of the earth with an absolute height accuracy of ±16m. Before starting the operational processing deferent kinds of calibration and motion compensation activit...

A set of suitable parameter values is crucial in discrete element method (DEM) simulations. As a non-spherical particle, the coefficients rolling friction between maize seed particles and boundary are hard to measure directly must be obtained by calibration. In this paper, taking three representative varieties as research objects, necessity for accurate calibration boundaries investigated. Subs...

In order to establish a Discrete Element Method (DEM) model of soil particles, the in laboratory bin was used as research object. The texture determined be sandy loam by sieving, and shape particles analyzed an image particle analyzer geometric particles. Edinburgh Elasto-Plastic Adhesion (EEPA) chosen contact for simulation analysis, accuracy selection tests. parameters played crucial role res...

We present a Differential Emission Measure (DEM) analysis of the quiet solar corona on disk using data obtained by the Extreme-ultraviolet Imaging Spectrometer (EIS) on Hinode. We show that the expected quiet Sun DEM distribution can be recovered from judiciously selected lines, and that their average intensities can be reproduced to within 30%. We present a subset of these selected lines spann...

This paper presents a BIST scheme to test and calibrate on-chip DAC and ADC and to improve both linearity and resolution of converters using a built-in sigma-delta modulator. We use a dithering dynamic element matching (DEM) techniques. A first-order sigma-delta modulator is used to sample DAC outputs because of high linearity of its outputs with high oversampling rate (OSR). The scheme is capa...

soil conservation service curve number method (scs-cn) is a widely applied technique for predicting direct runoff from rainfall has been used around the world. in this study, the curve number maps and entry physical model data of kheyrud basin to hec-hms model, the hec-geohms extension in arcgis software and google earth satellite images were used. in addition to the statistical analysis of sur...

Acoustic emission (AE) or vibration signal has been applied in detecting operations of grinding mills many industries. This paper proposes an approach to generate AE signals based on the particle-wall impacts. Through a combination multi-mode vibrations and calibration key parameters, model was able reproduce experimental data. The then implemented into discrete element method (DEM) modelling p...