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| 1 | A LINEAR THEORY FOR DISTURBANCE OF COHERENT STRUCTURE AND MECHANISM OF SAND WAVES IN OPEN-CHANNEL FLOW显示文摘The formation of sand wave is such a process in which the roughness and discontinuity of the original bed surface cause the disturbance of the bottom laminar flow in an open channel, and the development of the disturbance in turn leads to instability of the flow and the appearance of the coherent structure. The evolution and development of the coherent structure further promote the undulations of bed surface and sand waves rise finally. The sand wave is explained as a result of action that the bed sediment particles are disturbed by the coherent structure. This study shows that the sand wave formation is the result of disturbance action of neutral coherent structure, and the sand wave shape obtained in computations is identical to the practical one. | Yuchuan BAI1, Andreas MALCHEREK2 and Changbo JIANG 1 Institute for Sedimentation on River and Coast Engineering, Tianjin University, Tianjin 300072, China. E-Mail: Ychbai@tiu.edu.cn 2 Federal Waterways Engineering and Research Institute | 2001 | International Journal of Sediment Research2001，16，2： | 14 |
| 2 | THREE DIMENSIONAL MATHEMATICAL MODEL OF SEDIMENT TRANSPORT IN ESTUARINE REGIONS-A CASE STUDY OF THE HAIHE RIVER MOUTH显示文摘A 3-D numerical model for simulating tidal flow and sediment transport in the estuarine regions is presented in this paper. The model adopts -coordinate system and carries out -coordinate transformation to the basic equations, which ensure that all horizontal area has equal numbers of calculation points in vertical direction, this method provides higher distinguishable rate to the flow and sediment transport. Under the -coordinate system, the Galerkin finite-element method is applied for horizontal domain by using a new specially interpolating shape functions, while a finite difference approximation is employed over depth. The model can be used even in the situations with a considerable variety in the water depth in the computational domain. The model is verified by a test for which analytical solutions are available and then applied to simulate the tidal current and sediment transport of the Haihe River Mouth. A modeling system of sediment transport is established for applying to muddy estuary of North China. The comparison with the field data shows that the model can well simulate the evolution process in the estuary. | BAI Yuchuan, SHEN Huanting, and HU Shixiong ( Asso. Prof. Dr., Institute for Sedimentation on River and Coast Engineering, Tianjin University, Tianjin, 300072, China 2 Prof., The State Key Laboratory of Estuarine and Coastal Research, East China Normal Un | 2000 | International Journal of Sediment Research2000，15，4： | 7 |
| 3 | NUMERICAL STUDY FOR EVOLUTION OF COHERENT VORTEX IN UNIDIRECTIONAL OSCILLATORY BOUNDARY LAYER OVER SAND RIPPLES显示文摘Ripples are widely formed in river channels and coastal regions, the bed-forms and vortex dynamics accompanied with them are quite important because they are responsible for frictions and sediment transports. The coherent vortex structure play a key role in the process, so how to model them is needed for understanding the formation process of sand ripples. In this paper, 2D Large-Eddy-Simulation (LES) was used to predict the flow structure and the dynamics of coherent vortex. The numerical results show a complete process of formation, evolvement and disappearance for the cases of unidire ctional and oscillatory flows over symmetic and asymmetric | Bai Yu-chuan Institute for Sedimentation on River and Coast Engineering,Tianjin University, Tianjing 300072, China Ng Chiu-On Department of Mechanical Engineering, The University of Hongkong, Hongkong, China | 2002 | Journal of Hydrodynamics2002，14，4： | 2 |
| 4 | Late Quaternary diatom and sea level changes in estuarine plain of the Jiulong River显示文摘Four units and twenty-four zones of diatom have been discerned in the Borehole ZK5 in the estuarine plain of the Jiulong River, Fujian Province. Comprehensive analysis of these, together with microbiological assemblages and age determinations in some other boreholes, shows that during the Late Wurm Glacial, sea level of the study area rose and fell frequently, but had principally been in the environments of estuary-bay. This mainly resulted from the tectonic subouction. In this period 3 low sea levels occurred. at 18, 16 and 12 kaBP respectively. During Holocene, sea weter intruded massively and the sea level over the transgnaion maximum had been 5-10 m higher than that of the present. | Chen Wenrui, (State Pilot Laboratory of Coast and Island Exploitation, Naning University, Naning 210093, China)Lan Dongzhao and Chen Chenghui (Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China) | 1998 | Acta Oceanologica Sinica1998，17，4： | 2 |
| 5 | Are meticillin-resistant Staphylococcus aureus bloodstream infection targets fair to those with other types of healthcare-associated infection or costeffective? 显示文摘 | Millar M Coast J Ashcroft R | 2008 | J Hosp Infect2008，69，1： | 1 |
| 6 | Effect of ammonia on metro-diaphrag- matic contractility, fatigue and recovery 显示文摘 | Shanely RA Coast JR | 2002 | Respiration2002，69，6： | 1 |
| 7 | Age-associated change in regional aortic pulse wave velocity显示文摘 | ROGERS W HU Y L COAST D | 2001 | Am Coll Cardiol2001，38，4： | 1 |
| 8 | Aguide to undertaking economic e- valuation within randomized Controlled trial of treatment for lower urinary tract symptoms 显示文摘 | Baxter K Coast J Donovan J | 2000 | BJU International2000，85，1： | 1 |
| 9 | Kinetic parameters from thermogravimetric data显示文摘 | Renfern J P | 1964 | Nature1964，201，： | 1 |
| 10 | Isolation and characterization of two chymotrypsins from the midgut of Locusta migratoria显示文摘 | Lam W Coast GM Rayan RC | 1999 | Insect Biochem Molec Biol1999，29，： | 1 |
| 11 | Helium isotope investigation on magnetic reversal boundaries of loess-paleosol sequence at Luochuan, central Chinese Loess Plateau显示文摘Extraterrestrial particles have higher 3He/4He ratios than those of terrestrial sediments ( > 100 Ra versus < 0.03 Ra, where Ra is the 3He/4He ratio normalized to the atmospheric value of 1.4×10?6). The inter- planetary dust particles (IDPs), which are very rich in 3He, continuously bombard the Earth and can accumulate in deposits. IDPs sedimentation rate changes can significantly influence 3He concentration in the Earth surface sediments. Since IDPs are not easy to detect in terrestrial deposits, measuring helium isotopes is a helpful approach to examine changes in IDPs. Helium concentration and helium isotopic composition magnetic substances and the quartz particles were examined for helium concen- tration and helium isotopic ratio. Results show that the 3He/4He ratio and the 3He concentrations of the magnetic substances are clearly higher than those of the bulk samples and the quartz particles, and, the 3He/4He ratio of the extracted magnetic substances is also higher than that of the average level of the Earth’s crust. The higher helium content in the magnetic fractions can be explained by an influx of IDPs. | DU XueQing1,6, WANG YongHong2, REN JianGuo3, YE XianRen4 & LU HuaYu5,1 1 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China 2 College of Marine Geosciences, Ocean University of China, Qingdao 266003, China 3 National Natural Science Foundation of China, Beijing 100085, China 4 Lanzhou Research Center for Petroleum and Natural Gas Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China 5 Key Laboratory of Coast and Island Development, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China 6 Graduate University of Chinese Academy of Sciences, Beijing 100049, China | 2007 | Chinese Science Bulletin2007，52，17： | 1 |
| 12 | An approach to cardiac arrhythmia analysis using hidden markov models显示文摘 | Coast DA Stren RM Cano GG | 1990 | IEEE Trans Biomed Eng1990，37，9： | 1 |
| 13 | Recognizing Financ^l Dis-tress Patterns Using a Neural Network Tool 显示文摘 | P K COASTS L F FRANKLIN | 1993 | FinancialManagement1993，22，3： | 1 |
| 14 | Diabetes and depression comor- bidity and socio - economic status in low and middle income countries (LM1Cs) : a mapping of the evidence显示文摘 | Leone T Coast E Naravannn S el al | 2012 | Global Health2012，8，： | 1 |
| 15 | Correlation of ultrasound findings and endometrial histopathology in postmenopausal women显示文摘 | Nasri MN Coast GJ | 1989 | Br J Obstet Gynaecol1989，96，11： | 1 |
| 16 | Early increase in blood lactate following injury显示文摘 | Coast TJ Smith JE Lockey D | 2002 | JR Army Med Corps2002，148，2： | 1 |
| 17 | Correlation of ultrasound findings and endometrial histopathylogy in postmenopausal women显示文摘 | Nasri MN Coast GJ | 1989 | Br J Obstet Gynecol1989，96，： | 1 |
| 18 | Vibrio infections on the Gulf Coast : results of first year of regional surveillance显示文摘 | Levine W C Griffin P M the Gulf Coast Vibrio Working Group | 1993 | J Infect Dis1993，167，： | 1 |
| 19 | An approach to cardiac arrhythmia analysis using hidden Markov models显示文摘 | Coast DA StemRM Cano GG | 1990 | IEEE Trans BME1990，17，9： | 1 |
| 20 | Early increase in blood lac- tate following injury 显示文摘 | Coast TJ Smith JE Lockey D | 2002 | JR Army Med Corps2002，148，2： | 1 |
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