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| 1 | EFFECTS OF FLOW INTENSITY, OBSTACLE ALIGNMENT AND CROSS-SECTION GEOMETRY ON SCOUR AT BRIDGE ABUTMENTS显示文摘Experiments are reported on the effects of flow intensity, obstacle alignment and cross-section geometry on the equilibrium scour depth around abutments. The effect of flow intensity was studied for clear-water flow conditions, the obstacle alignment was studied for a wide range of angles of the obstacle with the flow direction, and tests on the cross-section geometry apply only to the case where the abutment extends into the main channel of a compound cross-section (two-stage channel). The channel bank and flood plain were built up with sand. The hypothesis of zero scour for flow velocities smaller than approximately 50% of the threshold velocity for the beginning of motion in the approaching flow cannot be rejected; maximum scour occurs for obstacles protruding at right angle from the cross-section walls, the reduction being small when obstacles point upstream; compared with rigid banks, the scour depth seems to be significantly reduced when channel bank and flood plain are constituted of alluvial material. | A. H. CARDOSO1, J. S. SANTOS2 and M. ROCA3 EFFECTS OF FLOW INTENSITY, OBSTACLE ALIGNMENT AND CROSS-SECTION GEOMETRY ON SCOUR AT BRIDGE ABUTMENTS A. H. CARDOSO1, J. S. SANTOS2 and M. ROCA3 EFFECTS OF FLOW INTENSITY, OBSTACLE ALIGNMENT AND CROSS-SECTIO | 2002 | International Journal of Sediment Research2002，17，2： | 6 |
| 2 | At what order does MP theory give exact geometries显示文摘 | He Y Cremer D Molecular geometries at sixth order Moller-Plesset perturbation theory | 2000 | Journal of physical chemistry A2000，104，32： | 2 |
| 3 | A Voronoi-based spatial algebra for spatial relations显示文摘 | LI Zhilin ZHAO Renliang and CHEN Jun(1. Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic University Hong Kong China 2. National Geometries Center of China Beijing 100044 China) | 2002 | Progress in Natural Science2002，，07： | 1 |
| 4 | electronic structures and energetics of small-diameter single-walled carbon nanotubes 显示文摘 | Kato K SaitoS Geometries | 2011 | Pbysica E2011，43，3： | 1 |
| 5 | In defense of the eight-point algorithm 显示文摘 | Multiple view geometry in York:Cambridge Universi- Hartley R I | 1997 | IEEE Transactions on Pattern Analysis and Machine Intelligence1997，19，6： | 1 |
| 6 | Influence of during creep crack growth testing of TiAl intermetallic compounds显示文摘 | FUJI A TABUCHI M JR notch shape and geometry A T Y | 1999 | Engineering Fracture Mechanics1999，62，： | 1 |
| 7 | The influence of the in- ferior caval anastomosis 显示文摘 | Migliavacca F Dubini G Bove EL et aL Computational fluid dynamics simulations in realistic 3-D geometries of the total cavopulmonary anastomosis | 2003 | J Biomech Eng2003，125，6： | 1 |
| 8 | Current Status of Education of Deseriptive Geometry in Europe显示文摘In this paper the importance of eometry?and raphics?for the advancement of science and knowledge in 19th century is pointed out. Klein and Müller reform of geometry syllabus in 19th century and the education situation of Geometry and Graphics in Europe during the last third of 20th century are introduced. The problems of geometry and graphics education during the next decedes and six proposals are presented. | Gunter Weiss Institute for Geometry, Dresden University of Technology, Dresden D-01062, Japan | 2001 | Computer Aided Drafting,Design and Manufacturing2001，11，1： | 0 |
| 9 | PHANTOM MAPS AND SPACES OFTHE SAME n-TYPE FOR ALL n显示文摘After reviewing the theory of phantom maps and SNT, the author gives several general results which relate the theory of phantom maps and SNT and which extend that of Harper and Roitberg. | I. DO(Topology and Geometry Research Center, Kyungpook National University, Taegu 702-701, Korea.)(Project supported by the TGRC-Kosef (TGRC Post Doc. Program) in 1997.) | 1999 | Chinese Annals of Mathematics,Series B1999，20，3： | 0 |
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