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Torque of the magnetic suspended rotor in a magnetically suspended control moment gyroscope (MSCMG) is caused by the spacecraft motion, rotation of the gyroscope frame, and relative motion of rotor. The rotor torque size is determined by magnetic bearing force only. At the same time, MSCMG introduces the elastic supporting magnetic bearings with clearance and active controllability. Rotary spindle...
We consider the problem of batch scheduling jobs on m parallel machines with time bound to minimize total weighted completion times. Each batching machine can processing to b jobs simultaneously as a batch. A polynomial-time optimal algorithm for identical job processing time model is presented whose details and proof are given.
There are high redundancy and low diversity problems existing in current search engines. To solve this problem, a skyline based search result diversification method was proposed. The search results were sorted in accordance with skyline level, domination degree and coverage. In order to reduce the time cost, a bitmap based skyline level and domination degree computing algorithm was designed. Experimental...
Assimilation, Accommodation and Equilibration are three important concepts in the description of the developmental process of human cognition in schema theory. Based on comparing some relative ideas in adaptive resonance theory and schema theory, a self-adjusting method to the vigilance value of ART2 network is proposed. It constructs the basis of supervised ART2 network, which make the computer simulation...
Category-based statistical language model is an important method to solve the problem of sparse data, but there are two bottlenecks about this model: (1) the problem of word clustering, it is hard to find a suitable clustering method that has good performance and has not large amount of computation. (2) class-based method always loses some prediction ability to adapt the text of different domain....
In this paper, a line fault location algorithm based on singular value decomposition and generalized regression neural networks (GRNN) is proposed for high voltage direct current (HVDC) transmission. As we know, the arriving instants of the first fault-induced transient backward travelling wave and the reflected wave can be detected. The high dimensional feature of travelling wave is different conditional...
According to the characteristics of large delay, large inertia and nonlinear of coagulant dosage, a two-layered predictive control strategy is proposed for the coagulant dosing systems. Model predictive controller(MPC) calculation is separated into steady-state and dynamic optimization, through the objective function to reflect economic performance. The proposed method only requires little information...
The loose and tight coupling algorithms of GPS/INS integrated navigation system are studied, and the accuracy of integrated navigation system in different coupling modes is analyzed. The optimal estimation on the error states of inertial navigation system and satellite navigation system is made by means of extended Kalman filter, and then the systems are collected. The simulation result proves that...
A new pheromone control strategy based on knowledge guide is presented. The main idea is to use the prior knowledge and group knowledge from statistical learning to guide the ant search. It has more targeted for ants search which combined with new pheromone updating strategy, thus contributing to a better solution for the algorithm. The experimental results indicate that the overall performance of...
The heating furnace is a complex controlled object, problems of nonlinear, time-varying and delay, it is difficult to model in the actual application and control. Based on the analysis of the insufficiency of the conventional fuzzy PID controller, through the observation of heating furnace temperature curve of typical, and points out how to introduce integrators and how to adjust the fuzzy rules in...
Recognition method of yellow apple fruit under natural environment was studied in the work. Firstly, image segmentation was conducted using K-Means clustering based on normalized R+G-B color feature. Meanwhile, the work adopted algorithms of Flood Fill for hole filling and elimination method of regional threshold for noise elimination. Then, edge detection of segmented images was implemented based...
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