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Estimating Minimum Fixed Biomass Concentration and Active Thickness of Nitrifying Biofilm
Publisher: American Society of Civil Engineers
Abstract: The objective of this study was to develop an approach to estimate the minimum fixed biomass concentration (
Nonlinear Analysis of Reinforced Concrete Slabs Using Nonlayered Shell Element
Publisher: American Society of Civil Engineers
Abstract: A nonlayered approach is proposed for the finite-element analysis of reinforced concrete (RC) slabs to predict their strengths including the case of combined in-plane and transverse loading. The nonlayered form is derived ...
Visualization and Simulation of Asphalt Concrete with Randomly Generated Three-Dimensional Models
Publisher: American Society of Civil Engineers
Abstract: The objective of this study is to visualize and simulate microscale properties of asphalt concrete with three-dimensional discrete element models under mechanical loading. The microstructure of the asphalt concrete sample ...
Accelerated Discrete-Element Modeling of Asphalt-Based Materials with the Frequency-Temperature Superposition Principle
Publisher: American Society of Civil Engineers
Abstract: This paper presents a methodology to reduce the computation time for discrete-element (DE) modeling of asphalt-based materials, based on the frequency-temperature superposition principle. Laboratory tests on the dynamic ...
Discrete-Element Modeling: Impacts of Aggregate Sphericity, Orientation, and Angularity on Creep Stiffness of Idealized Asphalt Mixtures
Publisher: American Society of Civil Engineers
Abstract: Hot-mix asphalt (HMA) contains a significant amount of mineral aggregate, approximately 95% by weight and 85% by volume. The aggregate sphericity, orientation, and angularity are very important in determining HMA mechanical ...
Interrelationship of DOC Distribution in Metabolic Network to Growth Yield in Batch Culture
Publisher: American Society of Civil Engineers
Abstract: Oxidative assimilation of dissolved organic carbon (DOC) includes the interrelated processes of catabolism and anabolism. It has been demonstrated that energy uncoupling is a dominant characteristic of substrate-sufficient ...
Closure to “Modeling of Energy Spilling in Substrate‐Sufficient Cultures” by Guang‐Hao Chen and Yu Liu
Publisher: American Society of Civil Engineers
Modeling of Energy Spilling in Substrate-Sufficient Cultures
Publisher: American Society of Civil Engineers
Abstract: A concept of an energy spilling coefficient between anabolism and catabolism was developed. Based on this concept, two models were proposed to describe quantitatively the effect of a substrate on the coefficient for ...
Simultaneous Heat and Mass Transfer in a Catenary Cooling Tower
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A 6-in. i.d. catenary contactor was used to evaluate the performance of this device as a new type of cooling tower. A fractional factorial statistical study facilitated the incorporation of ...
Three-Dimensional Microstructural-Based Discrete Element Viscoelastic Modeling of Creep Compliance Tests for Asphalt Mixtures
Publisher: American Society of Civil Engineers
Abstract: Microstructural-based discrete element (DE) models have been used for a better understanding of asphalt pavement concrete since the late 1990s. Most current studies have been done with two-dimensional (2D) models. Moreover, ...