Now showing items 1631-1640 of 1640
An investigation of the effect of entrained oil on the heat transfer rate of a refrigerant evaporator
(Virginia Polytechnic Institute, 1964)
The investigation is concerned with the effect of entrained oil on the heat transfer characteristics of a direct expansion evaporator coil. A modified refrigeration system, in which the oil content of the refrigerant could ...
Testing of the suspended vehicle system scale model
(Virginia Polytechnic Institute and State University, 1973)
A 1/24th scale model of the SVS (Suspended Vehicle System) guideway was constructed, instrumented, and tested. The model simulated five 250-ft-spans of the cable-stayed guideway for high-speed mass transportation type ...
An analytical investigation of the effect of blade profile variations on the erosion of coal-fired turbine blades
(Virginia Polytechnic Institute and State University, 1978)
The effect of blade profile variations on the erosion of turbine blades subjected to flow containing particulates was analytically determined. To accomplish this end, the two-dimensional inviscid main flow field was ...
A finite element analysis and redesign of the draftsill casting on a railroad hopper car
(Virginia Polytechnic Institute and State University, 1987)
This paper presents a static three-dimensional finite element analysis and redesign of a railroad hopper car draftsill. The purpose of the work was to modify the current draftsill structure to minimize its weight without ...
The determination of stresses in machine frames
(Virginia Agricultural and Mechanical College and Polytechnic Institute, 1925)
no abstract provided by author
Modified Kernel Principal Component Analysis and Autoencoder Approaches to Unsupervised Anomaly Detection
(Virginia Tech, 2020-06-01)
Unsupervised anomaly detection is the task of identifying examples that differ from the normal or expected pattern without the use of labeled training data. Our research addresses shortcomings in two existing anomaly ...
Control-Oriented Thermal Model for a Hybrid Vehicle Battery
(Virginia Tech, 2020-06-01)
In a bid to reduce vehicular emissions, automobile manufacturers are moving towards elec- tric and hybrid vehicles. Most hybrid vehicles use Lithium-ion batteries as energy storage systems. Lithium-ion batteries have a ...
Nonholonomic Control Utilizing Kinematic Constraints of Differential and Ackermann Steering Based Platforms
(Virginia Tech, 2016-11-30)
A nonholonomic tracking controller is designed and adapted to work with both differential steering and Ackermann steering based platforms whose dynamics are represented using a unicycle model. The goal of this work is to ...
Canonical Decomposition of Wing Kinematics for a Straight Flying Insectivorous Bat
(Virginia Tech, 2018-01-22)
Bats are some of the most agile flyers in nature. Their wings are highly articulated which affords them very fine control over shape and form. This thesis investigates the flight of Hipposideros Pratti. The flight pattern ...
Evaluation of a Simple Model for the Acoustics of Bat Swarms
(Virginia Tech, 2016-09-15)
Bats using their biosonar while flying in dense swarms may face significant bioacoustic challenges, in particular mutual sonar jamming. While possible solutions to the jamming problem have been investigated multiple times ...