Browsing by Author "Liu, Ying"
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Item Hydraulic Transient Study of Fall River Tunnel System(1994-12) He, Jianming; Song, Charles C.S.; Liu, YingItem Hydraulic Transient Study of Mainstream & Des Plaines TARP Phase II Systems(St. Anthony Falls Hydraulic Laboratory, 1994-07) Song, Charles C. S.; He, Jianming; Liu, Ying; Gong, CuilingNumerical studies of hydraulic transients for the TARP Phase I system were conducted in 1988. and 1992. These studies revealed that due to storage and/or conveyance limitation of the TARP Phase I Mainstream system, inflow must be substantially reduced to avoid geysering problems induced by hydraulic transients. Different inflow control solutions to different cases of the TARP Phase I were suggested in the previous project reports. TARP Phase II is designed to add additional water storage and increase the conveyance ability. This study is to investigate the extent and nature of hydraulic transients in Mainstream/Des Plaines TARP Phase II and to evaluate its design performance using computer modeling. The fully dynamic transient mixed flow mathematical model (MXTRANS) developed at the University of Minnesota was used for this study. To evaluate the hydraulic performance of the TARP Phase II System, including the Phase I Mainstream tunnel, Phase II Relief tunnel, and Phase I Des Plaines tunnel with or without four planned reservoir stages, four groups of modeling configurations for the systems as listed below are being considered Group A: Stage I Mainstream (Mainstream alone) Tunnel System Group B: Stage II Mainstream (Mainstream. With Relief Tunnel) System Group C: Des Plaines With or Without Mainstream System Group D: Interconnected Des Plaines and Mainstream Systems (Mainstream with Relief Tunnel and Des Plaines Tunnel)Item Hydraulic Transient Study of Mainstream Tunnel System and Control System(St. Anthony Falls Hydraulic Laboratory, 1994-10) He, Jianming; Song, Charles C. S.; Liu, Ying; Cuiling, GongNumerical studies of hydraulic transients for the TARP Phase I system were conducted in 1988 and 1992. These studies revealed that due to storage and/or conveyance limitations of the TARP Phase I Mainstream system using the Keifer/Song maximum hydrograph, inflow must be substantially reduced to avoid geysering problems induced by hydraulic transients. In order to improve the hydraulic transient condition, TARP Phase II has been proposed to add additional water storage and increase the conveyance ability. A hydraulic transient study for the TARP Phase II system was also conducted recently. However, before the TARP Phase II is completed, a reasonable tunnel operation method for the current TARP Phase I system must be sought to minimize the potential of the hydraulic transient problems. This study is to investigate the extent and nature of hydraulic transients in the current TARP Phase I Mainstream tunnel under the existing flow control structures for different hydrographs.Item Hydraulic Transient Study of Narragansett Bay Commission Tunnel System(St. Anthony Falls Laboratory, 1995-08) He, Jianming; Song, Charles C. S.; Liu, YingThe purpose of this study is to evaluate the hydraulic transient status in the proposed Narragansett Bay Commission (NBC) Tunnel System in north central Rhode Island. The tunnel system is designed as an off-line storage facility. As shown in Fig. 1, the tunnel system consists of Main Spine Tunnel and Seekonk Tunnel, as well as 18 dropshafts. For a larger storm, the inflow must be controlled to prevent overfilling. At a circumstance of inflow control gate failure at some dropshafts, the flows exceeding the storage capacity of the tunnel may overflow into the Mosshasuck River through an "extreme event overflow". This structure is proposed to be located in the vicinity of OF 009/010.Item Hydraulic Transient Study of Passaic River Flood Protection Tunnel(St. Anthony Falls Hydraulic Laboratory, 1994-09) He, Jianming; Song, Charles C. S.; Liu, YingThe purpose of this study is to evaluate the hydraulic transient status in the proposed Passaic River Flood Protection Tunnel. The tunnel system is designed to convey flood waters from the upstream areas of Passaic River directly into Newark Bay. The tunnel consists of two upstream inlets, the Pompton Inlet and the Spur Inlet, and a 42 ft diameter main tunnel. The main tunnel length is about 20.1 miles (from the Pompton inlet to the downstream end). The distance between the Spur inlet and the main tunnel is about 1.2 miles. The tunnel system will be excavated from 150 to more than 400 ft under ground. From the hydraulic transient point of view, there are the following possible safety concerns in this tunnel system, which need to be evaluated using hydraulic transient computer. simulation program. (1) Surge phenomena induced during the initial filling stage. (2) Water hammer phenomena due to a sudden pressure change. (3) The effects of the surge and water hammer on the inlets, workshafts, and downstream outlet.Item UMLS::Similarity: Measuring the Relatedness and Similarity of Biomedical Concepts(Association for Computational Linguistics, 2013-06) McInnes, Bridget; Liu, Ying; Pedersen, Ted; Melton, Genevieve; Pakhomov, SergueiUMLS::Similarity is freely available open source software that allows a user to measure the semantic similarity or relatedness of biomedical terms found in the Uniļ¬ed Medical Language System (UMLS). It is written in Perl and can be used via a command line interface, an API, or a Web interface.