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Browsing 09 Engineering by Issue Date

Browsing 09 Engineering by Issue Date

Now showing items 41-60 of 2363

Modeling and analysis of concrete production plant using petri nets

Sawhney Anil; Abudayyeh O; Chaitavatputtiporn T (Asce-Amer Soc Civil Engineers, 1999)

Computer modeling and analysis of construction processes have gained importance in recent years because of an increase in the complexity of construction processes. Petri nets provide a modeling and analysis approach that ...
Hierarchical and modular modeling of structural steel erection process using Petri Nets

Sawhney Anil; Mund A (Gordon Breach Sci Publ Ltd, 1999)

The construction industry is growing at a fast pace-newer project delivery methodologies are being adopted; design of facilities is continuously improving, newer means, methods, and materials of construction are being used. ...
MODIS Vegetation Index Compositing Approach: A Prototype with AVHRR Data

Van Leeuwen J; Huete Alfredo; Laing Trevor (Elsevier, 1999)

In this study, the 16-day MODIS (MODerate resolution Imaging Spectroradiometer) vegetation index (VI) compositing algorithm and product were described, evaluated, and compared with the current AVHRR (Advanced Very High ...
Macroinvertebrate fauna and water quality in two irrigation channels in the Shepparton Irrigation Region, Victoria

Kefford Benjamin; Doeg T (Royal Society of Victoria, 1999)

A large amount of water is diverted from rivers into irrigation channels in northern Victoria. but little is known of the biological communities of irrigation channels. A preliminary survey of macroinvertebrates and water ...
Solution ripening of hydroxyapatite nanoparticles: Effects on electrophoretic deposition

Wei M; Ruys A; Milthorpe Bruce; Sorrell Charles (John Wiley & Sons, Inc, 1999)

Electrophoretic deposition is a low-cost, simple, and flexible coating method for producing hydroxyapatite (Hap) coatings on metal implants. However, densification requires heating the coated metal to high temperatures, ...
Bubble Extraction of Dissolved Gases from Groundwater Samples

Walsh Kayleen; Mclaughlan Robert (Springer, 1999)

A technique is described for measuring the concentration of dissolved methane in water samples. A 250 L bubble is injected into a 5 mL vial to create a headspace. The headspace gas is subsequently analysed by gas ...
Enhancing effect of marine oligotrophy on environmental concentrations of particle-reactive trace elements

Jeffree Ross; Szymczak Ron (American Chemical Society, 2000)

A biogeochemical model has been previously developed that explains the inverse and nonlinear relationship between Po-210 concentration in zooplankton and their biomass, under oligotrophic conditions in French Polynesia. ...
Optical-Biophysical Relationships of Vegetation Spectra without Background Contamination

Gao Xiang; Huete Alfredo; Ni Wenge; Miura Tomoaki (Elsevier, 2000)

For a better evaluation of the accuracy of VIs in estimating biophysical parameters, a ¿true¿ VI value attributed only to the vegetation signal and free of any contamination is needed. In this article, pure vegetation ...
Leaf Area Index Estimates Using Remotely Sensed Data and BRDF Models in a Semiarid Region

Qi J; Kerr Y; Moran M; Weltz M; Huete Alfredo; Sorooshian S.; Bryant R (Elsevier, 2000)

The amount and spatial and temporal dynamics of vegetation are important information in environmental studies and agricultural practices. There has been a great deal of interest in estimating vegetation parameters and their ...
Analysis of Vegetation Isolines in Red-NIR Reflectance Space

Yoshioka Hiroki; Miura Tomoaki; Huete Alfredo; Ganapol B (Elsevier, 2000)

The characteristic behavior of red-near-infrared (NIR) reflectance-based vegetation isolines were analyzed by focusing on its three features: the slope, NIR-intercept, and the intersection between the vegetation isoline ...
Modelling of structural response and optimization of structural control system using neural network and genetic algorithm

Li Q; Liu D; Leung Andrew; Zhang Nong; Tam C; Yang L (John Wiley & Sons, Ltd, 2000)

In recognition of the increasing importance of accurate seismic vulnerability assessment, this paper deals with procedures and the application of inelastic acceleration and displacement spectra in the seismic assessment ...
Design of Stable Fuzzy Controllers for an AGV

Wijesoma W; Teoh Eam; Kodagoda Sarath (IEEE, 2000)

Fuzzy logic control is a relatively new technology and hence it needs rigorous comparative analyses with other well-established conventional control schemes. Furthermore, fuzzy controller stability analysis is a major ...
On centreline distributions of velocity and momentum in synthetic jet actuator flows

Hong Guang; Mallinson Samuel; Lee Chester; Ha Quang (Adelaide University, 2001)

An experimental investigation of the sythetic jets generated by plezoelectrically driven actuators with circular orifice is reported. The investigation aims to provide information for active control of boundary layer ...
A Simple Approach To Search For All D-Mcs Of A Limited-Flow Network

Yeh Wei-Chang (Elsevier Sci Ltd, 2001)

Many real-world systems are multistate systems composed of multistate components in which the reliability can be computed in terms of the lower bound points of level d, called d-MCs. Such systems (electric power, transportation, ...
A Simple Algorithm To Search For All D-Mps With Unreliable Nodes

Yeh Wei-Chang (Elsevier Sci Ltd, 2001)

Many real-world systems are multistate systems composed of multistate components in which the reliability can be computed in terms of the lower bound points of level d, by formulating in terms of either the d-minimal paths ...
Manganese profiles in freshwater mussel shells

Siegele R.; Orlic I.; Cohen D.; Markich S.; Jeffree Ross (Elsevier B.V., 2001)

The heavy ion microprobe in combination with particle-induced X-ray emission was used to measure the distribution of manganese in freshwater mussel shells (Hyridella depressa) from the Nepean river in south-eastern Australia. ...
Recovery of fish communities in the Finniss River, Northern Australia, following remediation of the rum jungle uranium/copper mine site

Jeffree Ross; Twining John; Thomson Jeremy (American Chemical Society, 2001)

In this study we compare fish diversity and abundances in the impacted region of the FR, with sites unexposed to elevated water concentrations of contaminants, both before and after remediation. Our results show both the ...
A 500°C isothermal section for the Al-Au-Cu system

Levey F; Cortie Michael; Cornish Lesley (Springer, 2001)

The Al-Au-Cu system and its associated ternary alloys and intermetallic compounds is surprisingly poorly known, and the authors could find no phase diagram for it in the literature. This article addresses this omission by ...
Performance evaluation of doubly-fed twin stator induction machinedrive with voltage and current space vector control schemes

Chilakapati Nagamani; Ramsden Victor; Ramaswamy Venkataraman (IET, 2001)

The doubly-fed twin stator induction machine (DFTSIM) is of interest as an adjustable speed drive (ASD) and a variable speed generator (VSG), as it combines the advantages of a brushless drive with the potential for ...
An experimental and numerical study of synthetic jet flow

Mallinson Samuel; Reizes John; Hong Guang (Royal Aeronautical Society, 2001)

The flow generated by a synthetic jet actuator with a circular orifice is investigated experimentally and computationally. The experimental data and computational predictions are in fair to good agreement with each other ...

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Browsing 09 Engineering by Issue Date