Background. Article is dedicated to the problem of the state quantity value pressure to the structural shape constructions during the process of exploitation without method of acoustic control testing. Objective.The aim of the paper is the improvement of the acoustic diagnostics of the shape constructions using the acoustic method of control. Methods. The echo reflection-shadow method for the achievement of the aim of research was proposed. Results. The acoustic spring connective coefficient was defined for the structural shape of metal constructions, that includes the density and fatness of the contact liquid, the force of pressure to the object of control, angle of the introduction of ultrasonic wave and the material of the control object with the usage the distance of neutral line of the structural shape construction, which allows improving the accurate diagnostics. Conclusions. The experimental research on the metal with this known chemical state allows defining the acoustic pressure coefficients of the connections of the structural shape of the metal constructions. Comparative analysis was carried out theoretically due to the proposed method of the acoustic diagnostics. It showed the absolutely fault for the pressures of 10 Amp, which is not higher than 3 % from the state of material.
*Кафедра виробництва приладів Національний технічний університет України «Київський політехнічний інститут» пр. Перемоги, 37, м. Київ, Україна, 03056 В статті висвітлено аспекти використання показників пальцевої фотоплетизмограми для визначення адаптаційного стану людини. Дані розробки можуть бути використані для прогнозування реакцій організму людини до різних видів терапії, що дозволить покращити результати терапевтичних процедур та нададуть можливість встановити ефективні параметри опромінення до проведення магнітолазерної процедури Ключові слова: фотоплетизмограма, магнітолазерна терапія, пульсова хвиля, хвильовий аналіз, адаптаційний статус В с т а т ь е о с в е щ е н ы а с п е к т ы использования показателей пальцевой фото плетизмограммы для определения адаптационного состояния человека. Данные разработки могут быть использованы для прогнозирования реакций организма человека к различным видам терапии, что позволит улучшить результаты терапевтических процедур и предоставят возможность установить эффективные параметры облучения к проведению магнитолазерной процедуры Ключевые слова: фотоплетизмограмма, магнитолазерная терапия, пульсовая волна, волновой анализ, адаптационный статус
Background. Coherent optical spectrum analyzers (COSA) are widely used in data processing systems. The efficiency of the spectrum analyzers is determined by their generalized characteristics such as the operating range of spatial frequencies, spatial bandwidth, the spatial spectral resolution and the energy resolution. One of such characteristics is geometric noise bandwidth GNBW that determines the spatial spectral resolution of spectrum analyzer. Objective. The purpose of this article is to provide a physical and mathematical model of COSA for calculating its geometric noise bandwidth, which determines the spatial spectral resolution of the spectrum analyzer. Methods. Based on the analysis of physical-mathematical model of COSA invited to determine the field amplitude at the output of the spectrum analyzer using the geometric noise bandwidth. Results. It was found that the spectrum analyzer can be considered as a coherent optical invariant linear system characterized by the impulse response and a transfer function. The geometric noise bandwidth of COSA is equal the square of the input transparency, amplitude transmittance of which is determined by the amplitude of the investigated signal. Conclusions. Analysis of the developed physical and mathematical model of the COSA showed that the geometric noise bandwidth is one of the important characteristics of the spectrum analyzer as it allows us to calculate the spatial spectral resolution. It was found that the coherent transfer function of the optical spectrum analyzer is equal to the square of the input transparency, amplitude transmittance of which is determined by the amplitude of the investigated signal.
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