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| 1 | EXPERIMENTAL STUDY ON INCIPIENT MOTION OF SEDIMENT PARTICLES ON GENERALIZED SLOPING FLUVIAL BEDS显示文摘This paper presents an experimental investigation on incipient motion of non-cohesive uniform sediment under a steady-uniform stream flow on generalized sloping fluvial beds (combined lateral and stream-wise slope). The characteristic parameters affecting the incipient motion of sediment particles, identified based on the physical reasoning and dimensional analysis, are the threshold shear stress ratio (ratio of threshold shear stress for sloping bed to that for horizontal bed), lateral slope, stream-wise slope and angle of repose of sediment particles. Experiments were carried out in two ducts (closed-conduit flow) having section of semicircular invert with three types of sediments. In an open channel flow (laboratory flume study), the uniform flow is a difficult, if not impossible, proposition for a steeply sloping channel and is impossible to obtain in an adversely sloping channel. To avoid this problem, the tests were conducted with a closed-conduit flow. Equation of critical bed shear stress for the initial movement of sediment particles on generalized sloping beds was obtained using the experimental data. | Subhasish DEY Asst. Prof., Dept. of Civil Engrg., Indian Inst. of Tech., Kharagpur 721302, West Bengal, India. Fax: +91 3222 82254 | 2001 | International Journal of Sediment Research2001，16，3： | 8 |
| 2 | EXPERIMENTS ON FLOW AROUND A CYLINDER IN A SCOURED CRANNEL BED显示文摘The flow pattern around a cylinder, installed in a scourd channel bed, was experimentally investigated. Detailed measurements of the instantaneous 3D velocities were performed by using an Acoustic Doppler Velocity Profiler (ADVP), from which the profiles of the time^averaged velocities and turbulence stresses were obtained. It is shown that the influence of thC cylinder and of the scour hole alters the approach flow; this is essentially confined to the viciulty of the cylinder and to the inside of the scour hole. The horseshoe vortex is measured as a flow reversal inside the scour hole, formed by the downward flow along the cylinder face and the reversed flow at the scour bed. | I. ISTIARTO and W.H. GRAF 1 Res. Asst., Lab. de recherches hydrauliques, Ecole Polytechnique Federale, Lausanne, Switzerland. E-mail: adhy.kurniawan@epfl.ch or istiarto@tsipil.ugm.ac.id 2 Prof, Lab. de recherches hydrauliques, Ecole Polytechnique Federal | 2001 | International Journal of Sediment Research2001，16，4： | 3 |
| 3 | The stability of slopes and underground openings against flexural toppling and their stabilisation显示文摘 | Asst. Prof. Dr. ?. Aydan Prof. T. Kawamoto | 1992 | Rock Mechanics and Rock Engineering1992，，3： | 1 |
| 4 | Why Do Firms Bribe?显示文摘 | Assoc. Prof. Seung-Hyun Lee Asst. Prof. Kyeungrae Oh Prof. Lorraine Eden | 2010 | Management International Review2010，，6： | 1 |
| 5 | Production of Non-Structural Concrete Using Different Types of Waste Materials显示文摘 | Asst. prof. Aamer Najlm Abbas Eng. Hussain Haider Abdulzahra | 2015 | 材料科学与工程(中英文B版)2015，5，5： | 0 |
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