The current trend of learning is towards distant learning. Using distance learners¡¦ learning portfolios recorded by Web Site can help teachers understanding the learning state of students. Teachers can encourage or supervise students through Email based on their different behavior. Eventually, we hope to enhance students¡¦ participation and interest when they are attending distant learning. We develop learning support mechanisms using portfolios in order to help teacher understanding the learning status of students conveniently and easy to apply mechanisms in distant learning environment. Finally, we will assess the effects of mechanisms to prove it can help students positively. The results will drawing in two parts. First, students accepted encouragement and supervision from teachers were enthusiastically than students don¡¦t accepted encouragement and supervision from teachers when attended each unit of test and synchronous conference. Second, according the questionnaire appears both groups of students agreed that teacher should encourage or supervise them according their learning behavior. In a word, students really need help from teacher at the right moment. And our research have proved that distant learning environment need provide convenient mechanisms for teachers.

In order to reduce the performance gap between the processor and the memory subsystem, many researchers attempt to integrate the processor and memory on a single chip in recent years. Therefore a new class of computer architecture: PIM (Processor-in-Memory) are investigated. For this class of architecture, we propose a new transformation and parallelizing system, SAGE, to achieve the benefits of PIM architectures by fully utilizing the capabilities of the host processor and memory processors in the PIM system. In this thesis, we focus on the weight evaluation mechanism and 1H-nM scheduling mechanism. The weight evaluation mechanism is used to evaluate the weights of P.Host and P.Mem for each task. The 1H-nM scheduling mechanism takes two different weights into account to exploit the advantages of two kinds of processors in the PIM system. The experimental results of above mechanisms are also discussed.

Based on the Lyapunov stability theorem, a methodology of designing robust discrete-time model reference variable structure state tracking controller is proposed in this thesis for a class of multi-input multi-output (MIMO) discrete-time systems. This variable structure controller is composed of three types of controllers. The first one is the feedback control law, which can eliminate the nominal term in the derivative of a Lyapunov function. The second one is the switching control law, which can determine the decreasing rate of the Lyapunov function. The third one is the adaptive control law, which is used to overcome the perturbations. The resultant robust variable structure controllers are capable of driving all the trajectories of tracking errors toward a small bounded region. The information of upper bound of the perturbation, which is not a constant and is dependent on the norm of state variable, is not required beforehand due to some adaptive mechanisms are embedded in the proposed control scheme, and the stability of the overall controlled system is guaranteed. A numerical example and a practical example are given to demonstrate the feasibility of the proposed control scheme.

The epicyclic gear mechanisms are widely used in the automatic transmissions for automobiles, and can provide several speed ratios by the controls of the input and fixed links with clutches and brakes. In order to increase the number of speed ratios, two or three embedded clutches are adapted in the automatic transmissions. However, the design of automatic transmissions with one embedded clutch has been hitherto ignored. Thus, the purpose of this work is to develop a systematic methodology for the design of automobiles automatic transmissions with one embedded clutch. First, the design specifications are established based on the requirements of the epicyclic automatic transmissions. Next, a procedure of the conceptual synthesis is developed to enumerate the epicyclic gear mechanisms with one embedded clutch. The corresponding atlas of the epicyclic gear mechanisms with two fundamental geared entities are established. Finally, a method is created to arrange the clutches and brakes into epicyclic gear mechanisms. Then the numbers of the teeth of gears are calculated by an analytical way. The result of this research shows that five five-speed automatic transmission and one seven-speed automatic transmission are synthesized. The associated efficiency for each speed is greater than 95%. This demonstrates the feasibility of the proposed methodology.

Thesis--University of Houston. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--Rutgers University, 2009. / "Graduate Program in Chemistry." Includes bibliographical references (p. 131-144).

Includes bibliographical references (p. 85-99).

Thesis (Ph. D.)--University of Oregon, 2000. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 106-112). Also available for download via the World Wide Web; free to University of Oregon users.

Thesis (Ph. D.)--Institute of Paper Chemistry, 1974. / Includes bibliographical references (leaves 81-84).

Thesis--Ph. D., University of Hong Kong.