Разработка лазерного доплеровского измерителя скорости и длины протяженных объектов

Работа посвящена разработке прибора, измеряющего скорость и длину протяженных объектов (металлопроката, различной кабельной продукции) на основе эффекта Доплера. Объектам исследования является методы и приборы контроля скорости и длины протяжённых изделий. Цель работы – Исследовать теоретические и практические аспекты создания прибора для технологического контроля скорости и длины протяжённых изделий на основе лазерного доплеровского метода. В результате исследования были получены теоретические и практические данные по оптимальным характеристикам лазерного доплеровского преобразователя, был спроектирован и исследован рабочий макет измерителя, на его основе были подтверждены прогнозируемые характеристики.The work is devoted to the development of a device measuring the speed and length of extended objects (rolled metal, various cable products) based on the Doppler effect. The objects of research are methods and instruments for controlling the speed and length of long products. The purpose of the work is to investigate the theoretical and practical aspects of creating an instrument for technological control of speed and length of long products based on the laser Doppler method. As a result of the study, theoretical and practical data on the optimal characteristics of the laser Doppler converter were obtained, a working prototype of the meter was designed and studied, and the predicted characteristics were confirmed on its basis

Разработка автоматической системы стабилизации температуры

Создание процедур arduino, с ардуином для достижения автоматического контроля температуры и определения наилучших параметров.The establishment of arduino procedures, with arduino to achieve automatic control of the temperature, and find the best parameters

Long-Term Persistence of Functional Thymic Epithelial Progenitor Cells In Vivo under Conditions of Low FOXN1 Expression

Normal thymus function reflects interactions between developing T-cells and several thymic stroma cell types. Within the stroma, key functions reside in the distinct cortical and medullary thymic epithelial cell (TEC) types. It has been demonstrated that, during organogenesis, all TECs can be derived from a common thymic epithelial progenitor cell (TEPC). The properties of this common progenitor are thus of interest. Differentiation of both cTEC and mTEC depends on the epithelial-specific transcription factor FOXN1, although formation of the common TEPC from which the TEC lineage originates does not require FOXN1. Here, we have used a revertible severely hypomorphic allele of Foxn1, Foxn1R, to test the stability of the common TEPC in vivo. By reactivating Foxn1 expression postnatally in Foxn1R/- mice we demonstrate that functional TEPCs can persist in the thymic rudiment until at least 6 months of age, and retain the potential to give rise to both cortical and medullary thymic epithelial cells (cTECs and mTECs). These data demonstrate that the TEPC-state is remarkably stable in vivo under conditions of low Foxn1 expression, suggesting that manipulation of FOXN1 activity may prove a valuable method for long term maintenance of TEPC in vitro

Electrodynamic finite element model coupled to a magnetic equivalent circuit

An electrodynamic field is coupled to a magnetic equivalent circuit. The electrodynamic problem is formulated by the electric vector potential and discretised by finite elements. The magnetic lumped parameter model is described in terms of unknown fluxes and magnetomotive forces. The coupled system matrix has a mixed and hybrid nature. In this presentation, the method is applied to simulate eddy current distributions in laminated material and losses in a dielectric heater

A deflated iterative solver for magnetostatic finite element models with large differences in permeability

The presence of materials with a relative large difference in permeability has a harmful influence on the convergence of Krylov subspace iterative solvers. Some slow converging components are not cured by preconditioning and correspond to eigenvectors reflecting the domains with relatively low permeable material. Approximations for those eigenvectors are determined using physical knowledge of the problem. The iterative solution process is split up in a small problem counting for the separated eigenmodes and a full-size problem out of which the slow converging modes are removed. This deflated preconditioned solver is faster converging compared to more common approaches, such as the incomplete Cholesky conjugate gradient method