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Hierarchical Framework for Shape Correspondence

Numerical Mathematics(Theory,Methods and Applications) 2013年第1期6卷 245-261页

作者： Dan Raviv anastasia dubrovina Ron Kimmel Technion Israel Institute of TechnologyTechnion CityHaifa 32000Israel

Detecting similarity between non-rigid shapes is one of the fundamental problems in computer *** order to measure the similarity the shapes must first be *** opposite to rigid alignment that can be parameterized using a small number of unknowns representing rotations,reflections and translations,non-rigid alignment is not easily *** of the methods addressing this problem boil down to a minimization of a certain distortion *** complexity of a matching process is exponential by nature,but it can be heuristically reduced to a quadratic or even linear for shapes which are smooth *** we model the shapes using both local and global structures,employ these to construct a quadratic dissimilarity measure,and provide a hierarchical framework for minimizing it to obtain sparse set of corresponding *** correspondences may serve as an initialization for dense linear correspondence search.

关键词： Shape correspondence Laplace-Beltrami diffusion geometry local signatures

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Immune Profile of COVID-19 Survivors and Contacts During 9 Months:A Cohort Study

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Infectious Diseases & Immunity 2023年第4期3卷 163-175页

作者： Valentina V.Tatarnikova Natalya O.Kiseleva Valentina I.dubrovina Vladimir A.Vishnyakov Darya D.Bryukhova Anna B.Pyatidesyatnikova Konstantin M.Korytov Munko B.Sharakshanov Sergey V.Balakhonov Irkutsk Antiplague Research Institute of Siberia and Far East of Rospotrebnadzor Irkutsk 664047Russia

Background:Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)causes a multi-organ systemic damage that can lead to long-term *** is known about the possible long-term effects of COVID-19 on circulating leukocyte kinetics and functional T-cell activity after *** investigate immune system changes,we designed a cohort ***:Volunteer screening and sample collectionwere performed at the Irkutsk Research Anti-Plague Institute of ***-four volunteers who have had COVID-19(recovered volunteers(RVs))betweenMay 2020 andMay 2021,33 volunteers who had been in contact with COVID-19 patients(contact volunteers(CVs))within the family setting but had not become ill,and 47 healthy volunteers(HVs)participated in the *** performed immunophenotyping of peripheral blood cells using flow *** was tested for SARS-CoV-2 anti-nucleocapsid immunoglobulin G antibodies by enzyme-linked immunosorbent assay(Ab(+),people with specific anti-N antibodies to SARS-CoV-2;Ab(−),people without specific antibodies).Results:There were no serious disturbances in the internal environment of the body in RVs and *** the evaluation of the general state of the immune system,the most informative indicator was the index of the ratio of neutrophils to bloodmonocytes–decreased on the 1st terms of observation(1 and 3 months post-symptom onset(PSO)/post-contact onset(PCO)),on average,1.3 times compared with HVs(8.6%(7.5%–10.5%),P<0.05),which recovered by the 6th month of *** of the cells responsible for the development of the adaptive immune response was noted only in RVs–increased B-lymphocyte content(HVs,9.1%(6.4%–10.2%))and immunoregulatory index ratio(HVs,1.6%(1.2%–2.1%))due to redistribution of T-helper and cytotoxic T cells throughout the follow-up period by an average of 1.2-fold compared with HVs(P<0.05).However,CVs with specific antibodies to SARS-CoV-2 N-protein also had an increased proportion of CD3−CD19+c

关键词： COVID-19 Flow cytometry Immunity Specific IgG T cells B cells

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