This paper develops a class of density regression models based on proportional hazards family, namely, Gamma transformation proportional hazard (Gt-PH) model . Exact inference for the regression parameters and hazard ratio is derived. These estimators enjoy some good properties such as unbiased estimation, which may not be shared by other inference methods such as maximum likelihood estimate (M...

Previous research introduced Conditional Phase-type distributions (C-Ph) consisting of a Coxian phase-type distribution conditioned on a BN where the phase-type distribution represents a continuous survival variable, the duration of time until a particular event occurs and the BN represents a network of inter-related variables. The C-Ph model has proved to be a suitable technique for modeling p...

We analyze the behavior of a multi-class single-server delay-loss system Cr MAPi/PH/l/m with a superposition of independent MAPS as arrival stream and phase-type distributed service times. Considering the underlying finite Markov chain with its quasi-birth-and-death structure with two boundary sets, we derive a new representation of its steady-state vector by a linear combination of two matrix-...

Experiments were carried out in nine 64 m ponds at CEPTArIBAMA over a period of 21 Ž . days in order to evaluate the effect of stocking density StD on survival and growth of larvae of matrinxa, Brycon cephalus. The larvae were randomly divided into treatments of 30, 60 and 120 ̃ 2 Ž . larvae m three replicates per treatment and fed three times a day. Samples of larvae were collected at days 0, 7...

In this paper we prove sharp weak type 1 estimates for spherical Fourier multipliers on symmetric spaces of the noncompact type. This complements earlier results of J.-Ph. Anker and A.D. Ionescu.

been studied for R=Me, Et, i-Pr, and Ph. The reactions are studied by 15N and 31p NMR spectroscopy. Two 31p NMR resonances were observed for R3PAuCN and (R3P)2Au+ species. However, for the 15N NMR, only averaged resonances were observed for R3PAuC15N and Au(C15N)2" species except for Et3PAuC15N, where two resonances were detected.The R3PAu13C15N complexes have also been prepared where R= Me, Et...

1. These notes are the second half of the contents of the course given by the second author at the Bachelier Seminar (8-15-22 February 2008) at IHP. They also correspond to topics studied by the first author for her Ph.D.thesis. 2. Unlike Part A of the course ([3]), this document still raises a number of questions, pertaining to various extensions of the classical Black-Scholes formula. 3. Comm...

3. LRI – Sébastien Tixeuil (FRAGILE coordinator), Assistant Professor – Joffroy Beauquier, Professor – Franck Cappello, INRIA Research Director – Pierre Fraigniaud, CNRS Research Director – Colette Johnen, Assistant Professor – Philippe Gauron, Ph.D. Student, started 1/9/2002, funded by MENRT – William Hoarau, Ph.D. Student, started 1/9/2004, funded by MENRT – David Ilcinkas, Ph.D. Student, sta...

1.1. Random walk in random potential. Let S = (S(n))n∈N0 be a nearestneighbor random walk on the lattice Zd, with start at the origin and drift h into the direction of the first axis. We suppose S being defined on a probability space (Ω,F , Ph), and we denote by Eh the associated expectation. Such a random process is characterized by the distributions of its finite-step sub-paths S[n] def = S(0...