356 research outputs found
Surface Defect Inspection of a Cutting Tool by Image Processing with Neural Networks
In this research, an image processing method and a system for inspection support of a rod figured cutting tool are developed. As is well known, the visual inspection of a cutting tool by image processing is not easy, because cutting blade have a helical blade structure. To cope with the problem, an experimental facility with rotation and longitudinal tool shift functions to enable acquisition of blade surface pictures along a cutting rod is developed. The type of the defect treated in this paper is the spot of coating on blade surface. To judge the quality of the processed image of blade surface, neural network with autonomous learning is used. The processed image of cutting tool is divided into 64 × 64 blocks used for the
input to the neural networks. Before input, each block data is preprocessed applying a edge detection filter and a transformation by the discrete fourier transform (DFT). Using these technologies, the experimental inspection system is built and tested to check the capabilities of the inspection algorithms. The diagnostic performance of the surface defect of a cutting tool was confirmed. There remained a problem to mis judge the normal tools as the defect
Hematopoietic Stem Cell Transplantation for the Treatment of Epstein-Barr Virus-Associated T- or NK-Cell Lymphoproliferative Diseases and Associated Disorders
Chronic active Epstein-Barr virus infection (CAEBV) is a prototype of EBV-associated T- and/or NK-cell (EBV+ T/NK-cell) lymphoproliferative disorders. Most subtypes of these are lethal. We established a unified treatment strategy composed of step 1 (immunochemotherapy: steroids, cyclosporine A, and etoposide), step 2 (multi-drug block chemotherapy), and step 3 (allogeneic hematopoietic stem cell transplantation; HSCT) for CAEBV and its related diseases. Allogeneic HSCT is the only cure for CAEBV with few exceptions. Primary-EBV infection-associated hemophagocytic lymphohistiocytosis (primary-EBV HLH) is also an EBV+ T/NK-cell lymphoproliferation. The nature of EBV+ T/NK cells in CAEBV and those in primary-EBV HLH differ. In primary-EBV HLH, most patients need step 1 only and some require step 2 for the successful induction of apoptosis in EBV-infected T cells; however, some exceptional patients require HSCT. We herein present our single institutional experience of CAEBV and primary-EBV HLH, together with that of post-transplant EBV+ T/NK-cell lymphoproliferative disease. We also discuss some practical points on HCST with a review of the literature
Cosmic Galaxy-IGM HI Relation at Probed in the COSMOS/UltraVISTA deg Field
We present spatial correlations of galaxies and IGM HI in the
COSMOS/UltraVISTA 1.62 deg field. Our data consist of 13,415 photo-
galaxies at with and the Ly forest absorptions in
the background quasar spectra selected from SDSS data with no signature of
damped Ly system contamination. We estimate a galaxy overdensity
in an impact parameter of 2.5 pMpc, and calculate the Ly
forest fluctuations whose negative values
correspond to the strong Ly forest absorptions. We identify weak
evidence of an anti-correlation between and with a Spearman's rank correlation coefficient of suggesting
that the galaxy overdensities and the Ly forest absorptions positively
correlate in space at the confidence level. This positive
correlation indicates that high- galaxies exist around an excess of HI gas
in the Ly forest. We find four cosmic volumes, dubbed
-, that have extremely large (small) values of () and (), three
out of which, -, significantly depart from the correlation,
and weaken the correlation signal. We perform cosmological hydrodynamical
simulations, and compare with our observational results. Our simulations
reproduce the correlation, agreeing with the observational results. Moreover,
our simulations have model counterparts of -, and suggest
that the observations pinpoint, by chance, a galaxy overdensity like a
proto-cluster, gas filaments lying on the sightline, a large void, and
orthogonal low-density filaments. Our simulations indicate that the significant
departures of - are produced by the filamentary large-scale
structures and the observation sightline effects.Comment: 14 pages, 12 figures. Accepted for publication in Ap
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