35 research outputs found
Default Probability Prediction Of Credit Applicants Using A New Fuzzy Knn Method With Optimal Weights
Credit scoring has become a very important issue due to the recent growth of the credit industry. As the first objective, this chapter provides an academic database of literature between and proposes a classification scheme to classify the articles. The second objective of this chapter is to suggest the employing of the Optimally Weighted Fuzzy K-Nearest Neighbor (OWFKNN) algorithm for credit scoring. To show the performance of this method, two real world datasets from UCI database are used. In classification task, the empirical results demonstrate that the OWFKNN outperforms the conventional KNN and fuzzy KNN methods and also other methods. In the predictive accuracy of probability of default, the OWFKNN also show the best performance among the other methods. The results in this chapter suggest that the OWFKNN approach is mostly effective in estimating default probabilities and is a promising method to the fields of classification
Estimation of the sizes of hot nuclear systems from particle-particle large angle kinematical correlations
International audienc
Formation and decay of hot nuclei in the Zn+Ti and Ar+Al reactions
International audienc
Isotopic effects in multifragmentation and the nuclear equation of state
Isotopic effects in spectator fragmentations following heavy-ion collisions at relativistic
energies are investigated using data from recent exclusive experiments with SIS beams
at GSI. Reactions of 12C on 112,124Sn at incident energies 300 and 600 MeV per nucleon
were studied with the INDRA multidetector while the fragmentation of stable 124Sn and
radioactive 107Sn and 124La projectiles was studied with the ALADIN spectrometer.
The global characteristics of the reactions are very similar. This includes the rise and
fall of fragment production and deduced observables as, e.g., the breakup temperature
obtained from double ratios of isotope yields. The mass distributions depend strongly
on the neutron-to-proton ratio of the decaying system, as expected for a simultaneous
statistical breakup. The ratios of light-isotope yields from neutron-rich and neutron-poor
systems follow the law of isoscaling. The deduced scaling parameters decrease strongly
with increasing centrality to values smaller than 50% of those obtained for the peripheral
event groups. This is not compensated by an equivalent rise of the breakup temperatures
which suggests a reduction of the symmetry term required in a liquid-drop description of
the fragments at freeze-out