碩士
國立暨南國際大學
土木工程學系
94
Abstract
Activated sludge system is a non-linear and complicated system. For biological nutrient removal (BNR), dynamic loading of the influent results in dynamic variation of ...effluent. For operators of wastewater treatment plants, they have to daily maintain the stability of the activated sludge system under dynamic loading of influent. It is also necessary to prevent the system from sludge bulking, washout and the decrease of treatment efficiencies. If the activated sludge system is operated basing on steady-state, it is difficult to well control the dynamic characteristics of effluent and to achieve the objective of a BNR system.
In this research, an A2O pilot plant was used to acclimatize activated sludge under different influent patterns and concentration for simulating domestic wastewater treatment plant. The pattern of recyclable nitrified water and recyclable sludge were simultaneously varied to control sludge pre-recycle for BNR. The artificial neural network and grey theory wer
碩士
國立臺灣海洋大學
輪機工程系
93
With the rapid development in Micro Electro Mechanical Systems (MEMS), it has made the research in the field of micro-scale size possible. It is known that MEMS is composed of ...the self-contained components, such as a micro-device, a micro-brake, a micro-controller and a micro-structure, etc. Among them, the micro-fluid system is extensively seen in the application of MEMS, for which was made up of micro-valve, micro-structure, micro-flow sensor device, and micro-pump. The typical micro-pumps are actuated by diaphragms like check valves. This device has two shortcomings. First, it is easy to wear for the micro parts because of mechanical friction. Second, pulse flow will be induced during the switch movements of the valve, and is therefore difficult to control. To avoid the above-mentioned problems, a method differing from traditional one is proposed to drive fluids in this study. The proposed method makes use of electro-osmotic principle to drive fluid in micro-channel. It is apparent tha
碩士
國立臺灣大學
化學工程學研究所
90
This thesis presents a combined analytical-numerical study for the Stokes flow caused by an arbitrary rigid particle of revolution translating axisymmetrically in a viscous ...fluid. The fluid, which may by a slightly rarefied gas, is allowed to slip at the surface of the particle. A singularity method based on the principle of distribution of a set of Sampson spherical singularities along the axis of revolution within a prolate particle or on the fundamental plane within an oblate particle is used to find the general solution for the fluid velocity field that satisfies the boundary condition at infinity. The slip condition on the surface of the translating particle is then satisfied by applying a boundary-collocation technique to this general solution to determine the unknown coefficients. The drag force exerted on the particle by the fluid is evaluated with good convergence behavior for various cases. For the motion of a slip sphere, our drag results agree very well with the exact solutio
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