Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

An optimal assignment procedure for multiple online surveys

Kamiński B., Kozakiewicz M., Jakuczun W., Półtorak M.

Operations Research and Decisions

2012

Vol. 22, No. 4

69--85

The problem of optimal assignment of respondents to internet surveys has been considered. The task is taken from a leading online research company in Central and Eastern Europe, which runs several dozen surveys in parallel. Each survey is assigned a target number of responses to be collected and unique selection criteria for choosing respondents based on their socio-demographic data. A mathematical programming model has been proposed that enables us to find an optimal mechanism for assigning respondents to surveys so as to minimize the required total number of invitations to surveys issued. A side effect of the assignment procedure is that the samples obtained are not representative of the population under survey. Therefore, a sample weighting scheme has been developed that takes this fact into account and allows us to obtain unbiased estimators of the characteristics of the population surveyed.

Wavelet based speaker recognition

Jakuczun W.

Prace Instytutu Podstaw Informatyki Polskiej Akademii Nauk

2003

Nr 959

1-7

In this article we are presenting wavelet-based method for designing speaker recognition features. The proposed method is compared to linear prediction method. As a classificator we used LBG algorithm, which is one of the vector quantization (VG) algorithms.

W artykule prezentujemy metodę szukania cech opartych na falkach dla problemu rozpoznawania mówców. Aby lepiej ocenić zaproponowaną metodą porównano ją do liniowej predykcji. Jako klasyfikatora użyliśmy algorytmu wektorowej kwantyzacji. Słowa kluczowe: rozpoznawanie mówców, falki, liniowa predykacja, kwantyfikacja wektorowa.