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RISApplication of PSO Method for Archimedean Copula Parameter Estimation in Flood (Rain) and Tide Joint Distribution Analysis
Publisher: ASCE
Abstract: Archimedean copulas are the most popular class of copulas used in hydrological statistical models. Parameter estimation of copulas is an open and complex task. A faster and computationally easier estimation procedure is ...
Determination of Equivalent Roughness of Bridge Piers’ Flow Resistance
Publisher: American Society of Civil Engineers
Abstract: The Manning equation has been widely used in rivers, with the flow resistance caused by bed roughness (n) to account for all energy loss influences associated with channel characteristics. Flow resistance also arises from ...
Rainstorm Combination Design during the Meiyu Season: An Example from Southern Jiangsu, China
Publisher: ASCE
Abstract: Meiyu is a unique weather phenomenon in East Asia that affects the middle and lower reaches of the Yangtze River in China, as well as Taiwan, central and southern Japan, and southern South Korea. It typically occurs from ...
Evaluation of the Active Limit Support Pressure for Shield Tunnel Face in Clay–Sand Interface Mixed Ground
Publisher: ASCE
Abstract: Although many calculation methods for tunnel face support pressure have been proposed, they are difficult to use in practical applications. In tunneling, the tunnel support pressure is currently being determined by empirical ...
Joint Probability Study of Destructive Factors Related to the “Triad” Phenomenon during Typhoon Events in the Coastal Regions: Taking Jiangsu Province as an Example
Publisher: ASCE
Abstract: Strong winds (W), storm tides (Z), and heavy rains (R) are the main destructive factors related to typhoons that affect the coastal regions of Jiangsu, where the “triad” phenomenon is obvious. Statistical results from 1960 ...
Theoretical and Experimental Analysis of Stress Variations in Precast Concrete Segment Linings during Double-Shield TBM Excavation of Subway Tunnels
Publisher: American Society of Civil Engineers
Abstract: During double-shield tunnel boring machine (DS-TBM) excavation of urban subway tunnels, backfilling with pea gravel and grouting is usually performed behind segment wall linings. However, insufficient pea gravel backfill ...
Micromachined Particle Filter With Low Power Dissipation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Microfilters for collecting micron-size airborne biological agents are designed and fabricated using a micro-electro-mechanical-system (MEMS) fabrication technology. The thickness of the microfilter ...
Pressure Drops of Water Flow Through Micromachined Particle Filters
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: When the particle is in the order of microns, flow through the small opening produces a large velocity gradient, leading to high viscous dissipation. Understanding the flow field is critical ...