835 Result(s)
within
**mo Wang
Civil Engineering
Classical and Continuum Physics
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Article
A stream tube model for miscible flow
Large-scale dispersion in heterogeneous porous media is studied by using a simple model based on stochastic calculation of convective flow in a bundle of stream tubes. The advantage of this approach is that th...
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Modeling full-tensor anisotropy in groundwater flow via an iterative scheme for mixed finite elements
This paper presents an iterative scheme for the efficient simulation of groundwater flow in a two-dimensional, heterogeneous aquifer in which the hydraulic conductivity is anisotropic. The scheme is applicable...
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An Approximate Solution for Fluid Infiltration near a Circular Opening in Unsaturated Media
A regular perturbation technique is employed to approximate the solution for fluid infiltration from a circular opening into an unsaturated medium. Introducing two empirical constitutive relations ...
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An Alternative Description of Viscous Coupling in Two-Phase Flow through Porous Media
A new formalism is developed to describe the viscous coupling phenomena between two immiscible, flowing fluids in porous media. The formulation is based on the notation of ‘two-phase mixture’ in which the rela...
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An N-dynamics Model for Predicting N-behavior Subject to Environmentally Friendly Fertilization Practices :I – Mathematical Model
Abstract. In order to increase the efficiency of nitrogen (N) use, and to reduce the potential for environmemtal contamination, certain Environmentally Friendly Fertilization Practices (EFFPs) have been propos...
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A N‐dynamics Model for Predicting N‐behavior Subject to Environmentally Friendly Fertilization Practices: II –Numerical Model and Model Validation
Nitrogen dynamics in the soil under the condition of environmentally friendly fertilization practices (EFFPs) is described by a comprehensive N‐dynamics model. The model (first paper of this series, Transport ...
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A real-time adaptive control algorithm using neural nets with perturbation
This paper proposes an adaptive algorithm of neural nets with a special perturbation for a real time velocity control system of a VVVF (Variable Voltage Variable Frequency) hydraulic elevator. The weight vecto...
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Study on stable nitroxyls (II): Synthesis of spin labeled phenoxyacetates as potential auxins
The syntheses and characterization of six new spin labeled phenoxyacetates as potential auxins are discribed.
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Flows Through Porous Media: A Theoretical Development at Macroscale
Good separation of microscale with macroscale leads to the existence of a macroscale description of flows through porous media. Such a macroscale description is developed in a systematic and rigorous way throu...
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Article
A novel structure of all-optical type silicon microresonator
A novel All-Optical type Silicon MicroResonator (AOSMR), with exciting and testing optical fibers is reported in this paper. It consists of a ridge optical waveguide and input and output optical fibers to pick...
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Article
A rapid fuzzy rule extraction method for fuzzy controller
Based on division of the three-dimensional space from data samples, the method proposed in this paper can rapidly extract fuzzy rules by using the fuzzy information of the samples. The principle of this approa...
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Article
A highly scalable structure for WDM multihop lightwave networks
In this paper, the author proposes a new virtual topology, referred to as fully connected cubic network (FCCN), for the wavelength division multiplexing (WDM) multihop lightwave network. The FCCN is a multi-le...
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Article
Influence of measurement errors on structural damage identification using artificial neural networks
The effect of measurement errors on structural damage identification using artificial neural networks (ANN) was investigated in this study. By using back-propagation (BP) networks with proper input vectors, nu...
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Article
Intraoperative ERCP and endoscopic sphincterotomy combined with laparoscopic cholecystectomy for treatment of cholelithiasis with choledocholithiasis
Objective: To evaluate the benefit of intraoperative ERCP and endoscopic sphincterotomy (EST) combined with laparoscopic cholecystectomy (LC) in the treatment of cholelithiasis with choledocholithiasis. Method...
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Article
Training a neural network for moment based image edge detection
Edge detection is a crucial step to computer vision. Currently, there is not a single edge detector that has both efficiency and reliability. Traditional differential filter-based algorithms have the advantage...
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Article
An ultrahigh vacuum chemical vapor deposition system and Si, GeSi epitaxy on a three-inch Si wafer
An ultrahigh vacuum chemical vapor deposition (UHV/CVD) system with reflection high energy electron diffraction (RHEED) was introduced. The Si epilayers and SiGe strained-layers on three-inch Si (100) substrat...
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Article
Expression of TGF-β1 and TGF-β R II in colorectal adenomas of varying stages
To study the function of transforming growth factor β1 (TGF-β1) and transforming growth factor-β type II receptor (TGF-βR II) in varying stages of colorectal adenoma during neoplastic transformation, fiftyfive ca...
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Article
Construction cost integrated control based on computer simulation
Construction cost control is a complex system engineering. The traditional controlling method cannot dynamically control in advance the construction cost because of its hysteresis. This paper proposes a comput...
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Article
Influence of pinning center distribution on the pinning of two-dimensional vortex system
The superconductor sample had periodic distribution of pinned region (with length ofL p) and unpinned region (with length ofL−L p) along the driving force direction. Numerical study on the influence of the distri...
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Tidal Effects on Groundwater Motions
Assuming a sharp interface between freshwater and seawater within a coastal aquifer, a theory is developed to account for the piezometric head movement of steady and unsteady components in terms of large- and ...
