Zobrazeno 1 - 10
of 18
pro vyhledávání: '"M. João Martins"'
Autor:
Mariana Mota, M. João Martins, Layanne Sprey, Anabela Maurício, Cristina Rosa, João Faria, Miguel B. Martins, Miguel L. de Sousa, Ricardo Santos, Rui M. de Sousa, Henrique Ribeiro, Cristina M. Oliveira
Publikováno v:
Horticulturae, Vol 10, Iss 1, p 36 (2023)
Currently, fertilization decisions in apple orchards are based on soil and leaf analyses while the leaf material is sampled after the growing season, usually in June–July (90–110 days after full bloom). This approach is inefficient, as the inform
Externí odkaz:
https://doaj.org/article/2a0cba8993964363b51ae3ea4f5a7fef
Publikováno v:
Revstat Statistical Journal, Vol 5, Iss 2 (2007)
Classical extreme value index estimators are known to be quite sensitive to the number k of top order statistics used in the estimation. The recently developed second order reduced-bias estimators show much less sensitivity to changes in k. Here, we
Externí odkaz:
https://doaj.org/article/2d418f756f584151bd88ef58b74df1ee
Publikováno v:
Far East Journal of Electronics and Communications. 18:457-476
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1116bb659c69bab6d905a5b89b415051
https://doi.org/10.17654/ec018030457
https://doi.org/10.17654/ec018030457
Autor:
Raquel M Seiça, M João Martins, Pedro B Pessa, Rosa M Santos, Luís M do Rosário, K I Suzuki, Maria I Martins
Publikováno v:
Acta Médica Portuguesa, Vol 16, Iss 6 (2003)
The impairment of insulin secretion, a major feature of type 2 diabetes, is caused by beta-cell mass reduction and functional failure. Pancreatic beta-cell mass reduction is variable in humans, not exceeding 50%, and has been associated with amyloid
Externí odkaz:
https://doaj.org/article/931172f57dea439f9d01f7d4427cbd2c
Autor:
Patrícia Fradinho, M. João Martins, Ana Magro, Isabel Sousa, Anabela Raymundo, M. O. Carvalho
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
The aim of this study was to analyse the effect of relative humidity in suppressing Sitophilus zeamais, in paddy rice stored under hermetic conditions, during four and seven months, at different average temperatures, as well as the impact on rice qua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::071f50e62c441282118c401e7bd3ae38
Publikováno v:
Communications in Statistics - Theory and Methods. 42:1227-1245
In this article, we revisit the importance of the generalized jackknife in the construction of reliable semi-parametric estimates of some parameters of extreme or even rare events. The generalized jackknife statistic is applied to a minimum-variance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6bb3c96d246ab549a28c1580d4b1fb0
https://doi.org/10.1080/03610926.2012.725263
https://doi.org/10.1080/03610926.2012.725263
Publikováno v:
Environmental and Ecological Statistics. 21:27-39
Given a set $$X$$ of $$k$$ points and a point $$z$$ in the $$n$$ -dimensional euclidean space, the Tukey depth of $$z$$ with respect to $$X$$ , is defined as $$m/k$$ , where $$m$$ is the minimum integer such that $$z$$ is not in the convex hull of so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ff5cf6a0ac3be0d4b68567161bc4e69
https://doi.org/10.1007/s10651-013-0242-7
https://doi.org/10.1007/s10651-013-0242-7
Publikováno v:
Biodiversity and Conservation
Over the last four decades the world has been losing biodiversity at an alarming rate despite the increasing number of protected areas (PAs). Certified forest management may complement the role of PAs in protecting biodiversity. Forest certification
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49deb60dc56268d48783ddeb4e590300
https://doi.org/10.1007/s10531-012-0401-4
https://doi.org/10.1007/s10531-012-0401-4
Autor:
M. João Martins, M. Ivette Gomes
Publikováno v:
Journal of Statistical Planning and Inference. 124:361-378
In this paper, and in a context of regularly varying tails, we analyse particular but interesting cases of the maximum likelihood and least squares estimators proposed by Feuerverger and Hall (Ann. Statist. 27 (1999) 760). All these estimators are al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2a9d30b75e9356c507e00799470a4b9
https://doi.org/10.1016/s0378-3758(03)00205-2
https://doi.org/10.1016/s0378-3758(03)00205-2
Publikováno v:
Test. 13:113-128
Averaging Hill's estimators leads to a reduction in the volatility of Hill's plot. We deal with a generalization of the procedure proposed by Resnick and Starica (1997), and propose alternatives, asymptotically equivalent at the respective optimal le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9043470ea895add5026dafc78654a88
https://doi.org/10.1007/bf02603003
https://doi.org/10.1007/bf02603003