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The traditional methods of image enhancement regard noise as harmful disturbance and try every means to eliminate it. However, under the circumstances with intense noise, the traditional ways are poor to enhance image due to low signal-to-noise ratio. In fact, noise in bistable system will improve performance of image enhancement when the stochastic(More)
The theory and statistics of clustering are introduced. The clustering based on the weighted distance is applied to cluster hydraulic press. This clustering method is proved applicable by the analysis of example. Clustering by longest distance is compared to clustering by shortest distance and the former is more suitable to solve the clustering task of(More)
Hybrid system is a dynamic system that bas discrete state transfer and continuous state variation. Recently, popular hybrid system model includes threshold-event-driven hybrid systems (TEDHS) and polyhedral invariant hybrid automaton (PIHA). Finite state machine is used to describe the discrete feature of hybrid system and reachable set of stream pipe is(More)
The concept of length-diameter ratio is introduced and the stress status of hi-speed milling cutter is analyzed with finite element method based on the ANSYS software. The impact of the length-diameter ratio variation on the stress and strain of milling cutter is researched to optimize the diameter and overhang of the cutter.
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