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The highly volatile methanethiol (MT) with an extremely low odor threshold and distinctive putrid smell is often identified as a major odorous compound generated under anaerobic conditions. As an intermediate compound in the course of anaerobic digestion, the extent of MT emission is closely related to the time of anaerobic reaction. In this study, lab-scale anaerobic digesters were operated at solids...
An integrated photo-bioelectrochemical (IPB) system is innovative through integrating microbial fuel cells (MFCs) with algal bioreactors for simultaneous organics degradation, nutrient removal, and bioenergy production. A mathematical model has been developed for simulating and understanding the performance of the IPB system. The model inputs include influent COD (chemical oxygen demand), NH4+-N,...
The quad-rotor pendulum is a multi-variable, nonlinear and non-minimum phase system. There are two main problems considered in controlling the quad-rotor pendulum: one is how to response quickly; the other is to stabilize the quad-rotor pendulum at the expected position. In order to solve these two problems, the Backstepping controller is used to realize it, the simulation results show that the proposed...
Finite difference time domain (FDTD) method is a robust and accurate algorithm which is widely used in computational electromagnetic field and the simulation of optical phenomenon. In this paper, parallel FDTD based on overlapped domain decomposition is used to simulate the band gap of photonic crystals and the quantum efficiency of thin film solar cells. The light-trapping effect is also analyzed...
The mathematical model of the flight simulator servo system was analyzed and the discrete sliding mode control (DSMC) was proposed, the reaching law of DSMC with Kalman filter was introduced to enhance the control character. The simulation shows the DSMC without filter has the big chattering and can influenced by disturbance, the DSMC with filter drives system state trajectories to arrive at the switch...
The development framework of parallel electromagnetic simulation software EMS-FMM based on multilevel fast multipole method (MLFMM) is present in this paper. EMS-FMM can solve large-scale scattering problem of 10 million scale with a complexity of O (Nlog N), so it's efficient for electric large target. It's implemented by C and Fortran with MPI communication on cluster DeepComp 7000. Implementation...
In this note, H∞ output tracking problem for network-based control system with multiple packet dropouts is introduced. Two channel packet dropouts are simultaneously considered due to limited communication capacity. One is measurement channel packet dropouts which are from the sensor to the controller. The other is control channel packet dropouts which are from the controller to the actuator. The...
This paper simulates human visual perception with regard to visual adaptation under the change of illumination. To reflect visual adaptation in scene rendering, we adopt the mathematic models simulating photopic, scotopic, and mesopic vision. We also take consideration the characteristic that adaptation to low visibility takes longer than high visibility. As a result, the outcome of the animation...
The problem of the non-fragile dissipative control for the nonlinear discrete systems is dealt with. The T-S models is constructed for nonlinear systems, which makes the model approach to the original system more exact. The sufficient conditions for the existence of a dynamic output feedback fuzzy controller such that, for all admissible multiplicative controller gain variations, the closed-loop system...
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