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  • 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.
41

Evaluation of hot gas welding techniques for the joining and repair of polymeric bumper materials

Turner, Brian Edward January 1990 (has links)
No description available.
42

Knock and knock intensity in a spark ignition engine

Karimifar, M. January 1988 (has links)
No description available.
43

E-PIC

Liu, Kefeng January 2016 (has links)
For  many  off-road drive   lovers,  planning a journey to  Tibet   is an ultimate dream.  However, the eco-system there  is quite sensitive and fragile. In this project I try to design  a sustainable vehicle that  could make us enjoy  an expedition to Tibet  while  protecting such precious environment. Research  about future trends, about the  environmental conditions, about emerging powertrain technologies and the Jeep brand helped me to establish my design  concept. Package  study, ideation sketches and clay modelling were used to develop both styling and functionality aspects of the vehicle. Digital modelling supported the fabrication of a quarter scale model.  Storytelling was used  to  explain the  concept and  the  situations that  Jeep  E-pic  drivers could meet  during their expedition. The result  is a self-powered all-terrain vehicle designed to carry  two occupants and their  expedition gear and equipped with various tools to handle  eventual maintenance and rescue  situations.
44

A path-specific approach to SEIR modeling

Porter, Aaron Thomas 01 May 2012 (has links)
Despite being developed in the late 1920s, compartmental epidemic modeling is still a rich and fruitful area of research. The original compartmental epidemic models were SIR (Susceptible, Infectious, Removed) models, which assume permanent immunity after recovery. SIR models, along with the more recent SEIR (Susceptible, Exposed, Infectious, Removed) models are still the gold standard in modeling pathogens that confer permanent immunity. This dissertation expands the SEIR structure to include a new class of spatial SEIR models. The exponential assumption of these models states that the latent and infectious times of the pathogen are exponentially distributed. Work that relaxes this assumption and still allows for mixing to occur at the population level is limited, thereby making strong assumptions about these times. We relax this assumption in a flexible way, by considering a hybrid approach that contains characteristics of both population level and individual level approaches. Next, we expand the Conditional Autoregressive (CAR) class of spatial models. This is to account for the Mumps data set we have procured, which contains mismatched lattice structures that cannot be handled by traditional CAR models. The use of CAR models is desirable here, as these models are known to produce spatial smoothing on lattices, and are a natural way to draw strength spatially in estimating spatial effects. Finally, we develop a pair of spatial SEIR models utilizing our CAR structure. The first utilizes the exponential assumption, which is very robust. The second develops a highly flexible spatial SEIR model by embedding the CAR structure into the SEIR structure. This allows for a realistic analysis of epidemic data occurring on a lattice. These models are applied to the Iowa Mumps epidemic of 2006. There are three questions of interest. First, what improvement do the methods proposed here provide over the current models in the literature? Second, did spring break, which occurred approximately 40 days into the epidemic, have an effect on the overall number of new infections? Thirdly, did the public's awareness of the epidemic change the rate at which mixing occurred over time? The spatial models in this dissertation are adequately constructed to answer these questions, and the results are provided.
45

Verifiering av PLC-logik : för styrsystem vid Volvo cars

Söder, Thomas, Karlsson, Henrik January 2002 (has links)
No description available.
46

CIAIR In-Car Speech Corpus : Influence of Driving Status

Kawaguchi, Nobuo, Matsubara, Shigeki, Takeda, Kazuya, Itakura, Fumitada 03 1900 (has links)
No description available.
47

Verifiering av PLC-logik : för styrsystem vid Volvo cars

Söder, Thomas, Karlsson, Henrik January 2002 (has links)
No description available.
48

Car Automatic Braking System : based on original reverse warning system

Ronghong, Xiao, Hai, Wang January 2012 (has links)
An original ultrasonic reverse warning system is a new system that can assist drivers while car is braking. It is includes ultrasonic emitter and receiver that can producing and receiving the ultrasonic waves to determine the distance between car and obstacle. But it is not good enough for the safety of cars, in this paper, we are meant to design a system that can help drivers stop the car automatically, an electronic circuit was constructed. According to this circuit we design, a signal was produced to the braking system of car based on the distance between car and obstacle for a safe braking purpose. Error is also discussed and during the experiment, the improvement for the original system has also achieved.
49

AMG D-VISION

Chen, Nianzhong January 2015 (has links)
Today China faces the issue of overcrowded urban spaces. Booming automobile ownership is causing massive traffic congestion. Even though public transportation has been promoted and regarded as mainstream within the society, I believe that private vehicles do not necessarily need to be a controversial option in the future. The design process included background research, user definition, packaging studies, ideation, digital form development and context visualization. All these were carefully executed to ensure a sensible and creative result. The proposed concept vehicle envisions greater technical efficiency combined with environmental responsibility. A sports car that is the ultimate carpooling solution during weekdays and a fun getaway drive for the weekends. / <p></p><p></p>
50

Light &amp; SHADOW : A Premium Lightweight Experience

Hunt, Matthew January 2014 (has links)
What if Light was used to emphasis the Lightness of a Lightweight structure. In this project I set out to explorer the way in which we visually and emotionally experience “Lightweight”. I feel that car companies are beginning to see previous mistakes and engineer for a future in which physically lighter cars are requisite. This leads me to the question; how do we as designers communicate this in a positive way and sell a future efficient, lightweight lifestyle? I began the project by considering “What is Lightweight” especially in its visual and emotional forms. This thought process lead me to the use of abstract photography of light itself to help me to create a new lightweight BMW design language. The final result is a mixture of lightweight, twisting, structural forms that flow around the user to create a floating interior architecture. This will allow for, in a future autonomous world, the exposure of a fully lightweight transportation experience.

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