Determining the number of clusters in a dataset is fundamental issue data clustering. Many methods have been proposed to solve problem selecting clusters, considering it be with regard model selection. This paper proposes an efficient algorithm that automatically selects suitable based on probability distribution framework. The includes following two components. First, generalization Kohonen's ...

We study, for the first time, maximum modulus set of a quasiregular map. It is easy to see that these sets are necessarily closed, and contain at least one point each modulus. Blumenthal showed entire maps either whole plane, or countable union analytic curves. show in case, by way contrast, any closed containing can be attained as These examples all polynomial type. also that, subject an addit...

This paper discusses a number of discrete models used for optimization of cutting condition during NC machining. The models can be broadly placed into two categories: 1. volumetric models in which feedrate is proportional to either average or instantaneous volumetric removal rate, 2. vector force models in which feedrate is set to values which keep either average or instantaneous cutting forces...

Abstract. In this paper, the minimum time feedrate trajectory planning problem for five-axis computer numerical control (CNC) machining is studied. A more accurate model for the feedrate trajectory planning problem is proposed by constraining the velocity, acceleration, and jerk for all five axes in the joint space and constraining the chord error in the workpiece coordinate system. For the new...

This paper deals with a predictive model of kinematical performance in 5-axis milling within the context of High Speed Machining. Indeed, 5-axis high speed milling makes it possible to improve quality and productivity thanks to the degrees of freedom brought by the tool axis orientation. The tool axis orientation can be set efficiently in terms of productivity by considering kinematical constra...

Grey relational analyses are applied to determine the suitable selection of machining parameters for Wire Electrical Discharge Machining (Wire-EDM) process. The Grey theory can provide a solution of a system in which the model is unsure or the information is incomplete. Besides, it provides an efficient solution to the uncertainty, multi-input and discrete data problem. According to the Taguchi...

In microbiochips and microfluidic devices, microholes are a basic important feature. The microdrilling of glass materials without cracks is still challenging in the fabrication glass-based microdevices. This paper investigates characteristics fused silica using polycrystalline diamond (PCD) tools fabricated by electrical discharge machining (EDM). particular, peak forces, which observed at begi...

Markov or a maximum entropy random field model for a prior distribution may be viewed as a minimizer of a variational problem. Using notions from robust statistics, a variational filter referred to as a Huber gradient descent flow is proposed. It is a result of optimizing a Huber functional subject to some noise constraints and takes a hybrid form of a total variation diffusion for large gradie...

Assessing the accuracy of land cover maps is often prohibitively expensive because of the difficulty of collecting a statistically valid probability sample from the classified map. Even when post-classification sampling is undertaken, cost and accessibility constraints may result in imprecise estimates of map accuracy. If the map is constructed via supervised classification, then the training s...