• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1684
  • 326
  • 214
  • 81
  • 67
  • 66
  • 32
  • 27
  • 22
  • 17
  • 10
  • 10
  • 10
  • 10
  • 10
  • Tagged with
  • 3896
  • 948
  • 919
  • 685
  • 681
  • 640
  • 620
  • 515
  • 505
  • 485
  • 370
  • 304
  • 297
  • 274
  • 253
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Battery charging power electronics converter and control for plug-in hybrid electric vehicle a thesis presented to the faculty of the Graduate School, Tennessee Technological University /

Jaganathan, Sharanya, January 2009 (has links)
Thesis (M.S.)--Tennessee Technological University, 2009. / Title from title page screen (viewed on June 29, 2010). Bibliography: leaves 127-131.
12

Effectiveness of managing the North West motor vehicles licencing revenue systems / Otsile Clutchia Senokwane

Senokwane, Otsile Clutricia January 2012 (has links)
The study intended to evaluate the effectiveness of managing the North West motor vehicles licensing revenue system in case of Department of Safety, Public Works in the North West Province with office in Mmabatho. Data was collected through telephone and e-mail questionnaire administered to the revenue section in the Department of Roads Safety and Public Works. A Sample size of 42 to which 44 copies of the questionnaire were dispatched returned all the questionnaires. The main findings revealed that the more knowledgeable the public the more they comply with policies. Tax incentives could be used to reduce health risk caused by car pollution. / Thesis (MBA) North-West University, Mafikeng Campus, 2012
13

Factors Contributing to the Growth of Electric Vehicle Sales

Lin, Zixin 01 January 2019 (has links)
This paper investigates factors that contribute to the growth in electric vehicle sales using a regression analysis. I study the effects of five factors through five different regressions on the data set that includes information on electric vehicle (EV) sales, gas price, unemployment rate, passenger car sales, personal income, and miles traveled from January 2012 to December 2018. I also test the interactive effect between factors to see whether the magnitude of impact on electric vehicle sales of certain independent variable will change based on the value of another independent variable. The implication of my study is that gas price and personal income positively affect the EV sales. The unemployment rate and miles traveled are negatively correlated with EV sales. Moreover, the impact of gas price, income, and miles traveled change when the passenger car demand is different. Personal income level will also determine how sensitive people are to gas price when purchasing electric vehicles.
14

Mechanical design of an energy efficient robotic leg for use on a multi-legged walking vehicle /

Vohnout, Vincent J. January 1982 (has links)
Thesis (M.S.)--Ohio State University. / Includes bibliographical references. Available online via OhioLINK's ETD Center.
15

Development and Flight Test of a Real-Time Energy Management Display

Atuahene, Isaac 01 August 2009 (has links)
A real-time energy management display is developed and evaluated, and the feasibility and utility of the display in providing real-time guidance and information on the aircraft’s energy state was investigated. Flight simulations were conducted with the UTSI Aviation Systems research flight simulator to validate the display and evaluate its utility for flying along constant specific excess power contours, and directly obtaining specific excess power contours from level acceleration flight test. The display was evaluated for flying optimal paths. This study considered the energy state of the aircraft from the point of view of the relation that exists between specific excess power and the forces in flight. The approach yields as one result a cubic function for the specific excess power, Ps, of the aircraft. We then directly solve for velocity, V as the control parameter for a given Ps, as a function of altitude, H. This technique is then used to build a real-time energy management display that provides guidance and real-time information of the aircraft’s energy state. Flight simulation results proved the display to be successful in obtaining direct Ps contours from level acceleration flight tests and in providing guidance for flights along constant Ps contours at low airspeeds although it was difficult to keep the Ps constant. However flights along zero Ps contours and along constant Ps contours at very high speeds were not successful. The application of the display in flying optimal paths was also not very successful with the current structure of the display. This was due to the fact that the display’s guidance information is provided in a digital format which is very sensitive, and tracking a number for guidance is nearly impossible.
16

A carbon nanotube pillar array ionizer for miniature ion thruster applications

Hicks, Troy C. January 2008 (has links) (PDF)
Thesis (M.S. in Astronautical Engineering)--Naval Postgraduate School, December 2008. / Thesis Advisor(s): Biblarz, Oscar ; Romano, Marcello. "December 2008." Description based on title screen as viewed on February 8, 2010. Author(s) subject terms: Space propulsion; Miniature ion thruster; Small satellite thruster; Microsatellite; Nanosatellite; Picosatellite; Small Satellite; Carbon Nanotube Pillar Array; CNT ionizer; CPA ionizer. Includes bibliographical references (p. 95-96). Also available in print.
17

Compatibility of ABS disc/drum brakes on class VIII vehicles with multiple trailers and their effects on jackknife stability /

Zagorski, Scott Bradley, January 2003 (has links)
Thesis (M.S.)--Ohio State University, 2003. / Includes bibliographical references (leaves 170-171). Available online via OhioLINK's ETD Center.
18

Flexible multibody dynamics and control of the bifocal relay mirror /

Moore, Brian M. January 2003 (has links) (PDF)
Thesis (Aeronautical and Astronautical Engineer and M.S. in Astronautical Engineering)--Naval Postgraduate School, December 2003. / Thesis advisor(s): Brij N. Agrawal, Marcello Romano. Includes bibliographical references (p. 59). Also available online.
19

Initiator diffraction limits for pulse detonation engine operation /

Werner, Steven P. January 2002 (has links) (PDF)
Thesis (M.S. in Astronautical Engineering)--Naval Postgraduate School, December 2002. / Thesis advisor(s): Christopher M. Brophy, Jose O. Sinibaldi. Includes bibliographical references (p. 45-47). Also available online.
20

Evaluation and simulation of electric vehicles

陳濤, Chan, To, Tony. January 1990 (has links)
published_or_final_version / Electrical and Electronic Engineering / Master / Master of Philosophy

Page generated in 0.0982 seconds