10,856 research outputs found
Tests for High Dimensional Generalized Linear Models
We consider testing regression coefficients in high dimensional generalized
linear models. An investigation of the test of Goeman et al. (2011) is
conducted, which reveals that if the inverse of the link function is unbounded,
the high dimensionality in the covariates can impose adverse impacts on the
power of the test. We propose a test formation which can avoid the adverse
impact of the high dimensionality. When the inverse of the link function is
bounded such as the logistic or probit regression, the proposed test is as good
as Goeman et al. (2011)'s test. The proposed tests provide p-values for testing
significance for gene-sets as demonstrated in a case study on an acute
lymphoblastic leukemia dataset.Comment: The research paper was stole by someone last November and illegally
submitted to arXiv by a person named gong zi jiang nan. We have asked arXiv
to withdraw the unfinished paper [arXiv:1311.4043] and it was removed last
December. We have collected enough evidences to identify the person and
Peking University has begun to investigate the plagiarize
Automatic landmark annotation and dense correspondence registration for 3D human facial images
Dense surface registration of three-dimensional (3D) human facial images
holds great potential for studies of human trait diversity, disease genetics,
and forensics. Non-rigid registration is particularly useful for establishing
dense anatomical correspondences between faces. Here we describe a novel
non-rigid registration method for fully automatic 3D facial image mapping. This
method comprises two steps: first, seventeen facial landmarks are automatically
annotated, mainly via PCA-based feature recognition following 3D-to-2D data
transformation. Second, an efficient thin-plate spline (TPS) protocol is used
to establish the dense anatomical correspondence between facial images, under
the guidance of the predefined landmarks. We demonstrate that this method is
robust and highly accurate, even for different ethnicities. The average face is
calculated for individuals of Han Chinese and Uyghur origins. While fully
automatic and computationally efficient, this method enables high-throughput
analysis of human facial feature variation.Comment: 33 pages, 6 figures, 1 tabl
Transmission of doughnut light through a bull's eye structure
We experimentally investigate the extraordinary optical transmission of
doughnut light through a bull's eye structure. Since the intensity is vanished
in the center of the beam, almost all the energy reaches the circular
corrugations (not on the hole), excite surface plasmons which propagate through
the hole and reradiate photons. The transmitted energy is about 57 times of the
input energy on the hole area. It is also interesting that the transmitted
light has a similar spatial shape with the input light although the diameter of
the hole is much smaller than the wavelength of light.Comment: 3 pages,4 figure
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