Nonlinear second-order equations with functional implicit impulses and nonlinear functional boundary conditions

AbstractIn this paper we deal with nonlinear second-order boundary value problems with impulses. The impulsive functions depend implicitly on the different considered variables and the boundary value conditions are nonlinear. In both cases functional dependence on the solution is allowed. The existence results follow from the existence of a pair of well-ordered lower and upper solutions

Subharmonic bouncing solutions of generalized Lazer-Solimini equation

The paper deals with the singular differential equation x 00 + g(x) = p(t), with g having a weak singularity at x = 0 and 2π-periodic function p. For any positive integers m and n, the coexistence of 2mπ-periodic bouncing solutions having n impacts with the singularity and a classical positive periodic solution is proven

The Purity Ensuring of Lubricants in Press Machines Operation

Import 02/11/2016V diplomové práci se zabývám problematikou zajištění čistoty a kvality hydraulických olejů u vstřikovacích lisů krauss Maffei. Jedná se zejména o zjištění aktuálního stavu olejových náplní u strojů a jejich posouzení pro další provoz. Za využití tribotechnické diagnostiky zjišťuji potřebné informace o kvalitě hydraulického oleje a jeho čistotě a posuzuji možnost jeho dalšího použití. Pro zlepšení a udržení čistoty maziva jsem navrhnul použití filtračního zařízení pro trvalé filtrování olejové náplně lisu. Dalším pokračováním a pravidelností využívání tribotechnické diagnostiky docílíme maximálního využití životnosti mazivaIn this diploma thesis I´m apply of problems to ensuring purity and quality of hydraulic oil in injection press machines Krauss Maffei. It´s about finding actual state of oil filing machinery and their review for other working. In using Tribotechnical diagnostic I´m finding needful information about quality of hydraulic oil and it´s purities and I rewiev posibilities for it´s another using. For impoving and holding purity lubricants I´m suggest using filtration apparatus for pernament filtering oil fill press machine. Next continue and regular using tribotechnical diagnostic we´re reaching maximum using lifetime lubricants.340 - Katedra výrobních strojů a konstruovánívýborn

Monitoring of excessive deformation of steel structure Extra-High Voltage pylons

Reliability and security of a power transmission depends on the state of the power grid and mainly on the state of the Extra-High Voltage pylons. The paper deals with deformation analysis of existing steel structure of selected Extra-High Voltage pylons which showed excessive differences comparing to the original design. In the assessment of the situation, geodetic survey of selected pylons of power grid that showed the greatest deformation was performed. On taken images, deformation of steel structures by using the FOTOMNG system was also analyzed. The proposed method allows a modeling of the structure of the object based on precisely obtained photographic documentation of the current state. It also represents a very effective method which allows to quickly and efficiently analyze the deformation in the structure of Extra-High Voltage pylons in the critical position of the power grid. Other benefits include the possibility of repeatable and safe measurement.Web of Science62232932

Adjusting the input ultrasound image data and the atherosclerotic plaque detection in the carotid artery by the FOTOMNG system

Stroke is the third most frequent cause of death. Specifically, ischemic stroke accounts for the largest group of this kind of cases. Despite all the advances in medical therapeutic methods, no methods that would reliably reduce mortality from ischemic stroke have been found. Prevention is still the most significant way to combat stroke. When the frequent cause of ischemic stroke is atherosclerotic plaque in the carotid artery, its exploration can help to determine the development of the disease. These problems were very extensively discussed in October 2013 during the XVI International Neurosonology Congress in Sofia organized under the auspices of World Research Neurosonology Group, Bulgarian Neurosonology and Cerebral Hemodynamics Association. Our goal was to develop special modules for carotid artery picture processing (AVI file processing, reparation and reconstruction) and modules containing tools for automated carotid artery plaque detection; and to solve its measurement and three-dimensional modelling of the carotid artery and the plaque. New modules were implemented into the FOTOMNG system and tested on appropriate input data files, which verified their functionality and applicability.Web of Scienc

Software analysis of mining images for objects detection

The contribution is dealing with the development of the new module of robust FOTOMNG system for editing images from a video or mining image from measurements for subsequent improvement of detection of required objects in the 2D image. The generated module allows create a final high-quality picture by combination of multiple images with the search objects. We can combine input data according to the parameters or based on reference frames. Correction of detected 2D objects is also part of this module. The solution is implemented into FOTOMNG system and finished work has been tested in appropriate frames, which were validated core functionality and usability. Tests confirmed the function of each part of the module, its accuracy and implications of integration.Web of Science181665

Verifying the Functionality of Constructions by NDT Methods

Import 26/06/2013V bakalářské práci se zabývám tématem nedestruktivní diagnostiky a její aplikací na konkrétní konstrukci. Konstrukce je navrhnutý nůžkový zvedák zaveden do výroby ve firmě Jewa s.r.o. Na zvedáku jsem aplikoval metodu nedestruktivní diagnostiky, a to magnetické paměti kovů se zaměřením zejména na kvalitu a celistvost svarového spoje uchycení pístu. Tato metoda a její použití je popsána v teoretické části práce. V praktické části bakalářské práce je proveden výpočet maximálního zatížení zvedáku, jeho potřebné konstrukční úpravy a vyhodnocení provedeného měření. Dále jsem provedl simulaci zatížení v 3D programu.In this bachelor work I’m focusing on non-destructive diagnostics and its application to a particular design. The structure is a scissor jack installed in production hall in Jewa Ltd. On the jack I have applied the method of non-destructive diagnostics concretely method of magnetic memories of metal with a particular focus on the quality and integrity of welded joints attaching the piston. This method and its application is described in the theoretical part. In practical part of the work is calculation of maximum load lifting, the necessary structural adjustments and evaluation of measurement. Furthermore, I simulated load in a 3D program.340 - Katedra výrobních strojů a konstruovánívýborn

Oscillatory solutions of singular equations arising in hydrodynamics

Abstract We investigate the singular differential equation (p(t)u (t)) = p(t)f (u(t)) on the half-line [0, ∞), where f satisfies the local Lipschitz condition on R and has at least two simple zeros. The function p is continuous on [0, ∞), has a positive continuous derivative on (0, ∞) and p(0) = 0. We bring additional conditions for f and p under which the equation has oscillatory solutions with decreasing amplitudes. Mathematics Subject Classification 2010: 34A12, 34C10, 34D05