We introduce into the classical perceptron algorithm with margin a mechanism that shrinks the current weight vector as a first step of the update. If the shrinking factor is constant the resulting algorithm may be regarded as a margin-error-driven version of NORMA with constant learning rate. In this case we show that the allowed strength of shrinking depends on the value of the maximum margin....

This clinical report describes the use of a subepithelial connective tissue graft to recontour a soft tissue margin discrepancy for a single-implant crown in the anterior maxilla. This procedure demonstrates that the use of soft tissue grafts to correct an esthetic deficiency may be a feasible approach to establish new and stable peri-implant soft tissue contours. The patient presented was foll...

The classical perceptron rule provides a varying upper bound on the maximum margin, namely the length of the current weight vector divided by the total number of updates up to that time. Requiring that the perceptron updates its internal state whenever the normalized margin of a pattern is found not to exceed a certain fraction of this dynamic upper bound we construct a new approximate maximum ...

Background Ultrasonography is useful for distinguishing between benign and malignant soft-tissue tumors. However, no study has focused on its usefulness in the differential diagnosis between low-grade and high-grade soft-tissue sarcomas. We conducted a retrospective study to determine the usefulness of the parameters of ultrasonograph and to develop a practical scoring system for distinguishing...

This paper deals with a cost sensitive extension of the standard Support Vector Machine (SVM) using an ordered weighted sum deviations misclassified individuals respect to their corresponding supporting hyperplanes. In contrast previous heuristic approaches, exact method that applies average operator in classical SVM model is proposed. Specifically, when weights are sorted non-decreasing order,...

abstract introduction. nowadays dental implants are accepted as a successful replacement of conventional fixed and removable prosthesis which can restore esthetics in an ideal way. because of visibility of anterior teeth while smiling and speaking, the importance of esthetics in these areas is very important. in this research, the provision rate of esthetic indexes of crowns supported with swis...