The dependence of cylindrical resonator natural frequencies on the fluid density

The article examines the dependence of cylindrical resonator natural frequencies (sensitive element) on the density (mass) of different fluids flowing through it. The cylindrical resonators are being widely applied in automatic control systems of technological processes as oscillating transducer density meter. The article presents the experimental results that prove the dependence of natural frequencies and vibration amplitude on the fluid density

МОДЕЛІ ПРОГНОЗУВАННЯ В МЕХАНІЗМІ РАННЬОГО ІНФОРМУВАННЯ І ПОПЕРЕДЖЕННЯ ФІНАНСОВИХ КРИЗ У КОРПОРАТИВНИХ СИСТЕМАХ

The paper is devoted to the problem of preventing financial crises in corporate systems, whose activities are becoming more and more complex in the context of globalization. The mechanism of early informing and crisis prevention in corporate systems is proposed, and includes five main modules: an analysis of the financial condition of the corporation, an analysis of the financial condition of subsidiaries, an evaluation of the impact of the financial crisis on a subsidiary on the threat of bankruptcy of the corporation as a whole, forecasting the financial condition of subsidiaries and corporation as a whole, anti-crisis management. The first four modules of the mechanism are the modules of implementation of proactive crisis management in the corporation, aimed at preventing the emergence of a crisis state, both in individual elements and in the corporate system as a whole. The fifth module is used in conditions of the current negative estimation of the financial condition of the corporation, and it is a "response" to existing crisis processes and phenomena in the corporation. After its implementation during the process of monitoring of the financial condition, proactive control modules are started to be used to allow early diagnosis and to prevent a crisis state. Particular attention is paid to such modules of proactive management as the evaluation of the impact of financial crises of subsidiaries on bankruptcy of the corporations as a whole and forecasting financial crises. A model basis for these two modules was developed. Neural networks, the mathematical apparatus of fuzzy logic, and the Caterpillar method were used for developing the models of estimation of the crisis threat in the corporate system. The developed set of models allowed to estimate the threat of financial crises in the parent enterprise and in the subsidiaries of the corporation, not only in the current but also in the perspective periods. The obtained results indicate that the financial condition of the investigated corporation is characterized by low level of the bankruptcy threat. Along with this, there is an increase in the threat of bankruptcy in a number of subsidiaries in the perspective period and the strong impact of local crises on the financial position of the corporation as a whole. The latter leads to the need of implementation of the anti-crisis measures in the corporate structure. An adequate tool for choosing anti-crisis measures and developing scenarios for the implementation of the anti-crisis management strategy is simulation modelling based on the concept of system dynamics.Рассматривается проблема предупреждения финансовых кризисов в корпоративных системах, деятельность которых становится все более сложной в контексте глобализации. Особое внимание уделяется оценке влияния финансовых кризисов дочерних компаний на банкротство корпораций в целом. Для оценки угрозы кризисов в корпоративной системе используются нейронные сети, математический аппарат нечеткой логики, метод «Caterpillar».Розглядається проблема запобігання фінансовим кризам у корпоративних системах, діяльність яких стає дедалі складнішою в контексті глобалізації. Запропоновано механізм раннього інформування і попередження криз у корпоративних системах, який включає п’ять основних модулів: аналіз фінансового стану корпорації, аналіз фінансового стану дочірніх підприємств, оцінка впливу фінансової кризи на дочірньому підприємстві на загрозу банкрутства корпорації в цілому, прогнозування фінансового стану дочірніх підприємств і корпорації в цілому, антикризове управління. Перші чотири модулі механізму є модулями реалізації проактивного антикризового управління в корпорації, спрямованого на недопущення появи кризового стану як в окремих елементах, так і корпоративної системі в цілому. П’ятий модуль використовується при поточній негативній оцінці стану корпорації і є «реакцією» на вже наявні кризові процеси і явища в корпорації. Після його реалізації у процесі моніторингу стану застосовуються модулі проактивного управління, що дозволяють здійснювати ранню діагностику і попереджати кризовий стан. Особливу увагу приділено таким модулям проактивного управління, як оцінка впливу фінансових криз дочірніх компаній на банкрутство корпорацій у цілому, прогнозування фінансових криз. Розроблено модельний базис цих двох модулів. Для побудови моделей оцінки загрози кризи корпоративної системи використовуються нейронні мережі, математичний апарат нечіткої логіки, метод «Caterpillar». Розроблений комплекс моделей дозволив оцінити загрозу формування фінансових криз на головному і дочірніх підприємствах корпорації не тільки в поточному періоді, а й у перспективному. Отримані результати свідчать, що фінансовий стан досліджуваної корпорації характеризується низьким рівнем загрози банкрутства. Поряд із цим спостерігається посилення загрози банкрутства на низці дочірніх підприємств у перспективному періоді і сильний вплив локальних криз на фінансовий стан корпорації в цілому. Останнє призводить до необхідності здійснення антикризових заходів у корпоративній структурі. Адекватним інструментом вибору антикризових заходів і формування сценаріїв реалізації стратегії антикризового управління є імітаційне моделювання, засноване на концепції системної динаміки

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The dependence of cylindrical resonator natural frequencies on the fluid density

The article examines the dependence of cylindrical resonator natural frequencies (sensitive element) on the density (mass) of different fluids flowing through it. The cylindrical resonators are being widely applied in automatic control systems of technological processes as oscillating transducer density meter. The article presents the experimental results that prove the dependence of natural frequencies and vibration amplitude on the fluid density

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The behavior of macroeconomic indicators (reflecting the development of both the national economy as a whole and that of individual economic sectors) testifies to the low current efficiency of the functioning of economic entities in the context of economic activities. This in turn necessitates scientific substantiation of developing and introducing theoretical and methodological recommendations to ensure innovative development of the country. One of the most effective ways to practically implement this task is to substantiate methods for quantitative assessment of potential in the context of economic activities. The practical value of applying these methods is that the results of the integrated assessment of potential can be used as a criterion for the priority development of certain economic sectors or economic activities