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Questions
European steppes are among the most threatened ecosystems in the Palaearctic region, mainly because of conversion to arable land. Abandonment may allow for the passive recovery of steppes. We made use of an exceptional old‐field succession chronosequence of nearly 100 years to answer the following questions: (a) Are the plant species composition, species richness and functional characteristics...
This paper presents the details of software development and implementation of a simulation model to be used for performance analysis of the control applied for management of a plug-in electric vehicles charging network. The model is designed to provide an evaluation of the tested control algorithms in terms of efficiency and stability operation. Apart from the control algorithm evaluation the model...
The impact of plug-in electric vehicles on urban power grids is a major issue for distribution network operators. To avoid a reduction in quality of electricity the operation of electric vehicle charging stations should be coordinated. The paper presents a model of a Smart Control System aimed to coordinate the charging stations and bring benefits to both the power network operator and EV users. The...
The paper discusses the impact of electric vehicles on household electric energy consumption. The estimation of daily and annual energy demand of an electric vehicle from an average household is investigated and expressed as the probability of energy required to charge the vehicle battery. A variety of scenarios of electric vehicles' performance for present day and future were analysed using a Matlab...
This paper demonstrates a possibilities of using brute force methods for evaluating the effectiveness of hierarchical management systems. Proposed model of hierarchy provides finding the optimal distribution of load between the executive elements at a predetermined structure. A simple hierarchical structure has been used as an example to investigate the functionality of the model and its software...
The paper discusses modelling of transport company management systems in a competitive environment. In order to analyse behaviour of the competing transport companies were modelled using an object-oriented structure. The criterion function applied for optimisation and implemented in the model was defined. The performance algorithm of a competitive environment was developed. To verify the proposed...
The paper discusses the impact of implementation of a variety of sensors into lift control system on its performance. It is shown that a hybrid model combining agent-based and discrete event methods can be used to assess operation of lift control systems. The proposed model has been simulated using AnyLogic systems to estimate impact of an additional sensor on performance of a ten floor lift system.
The paper discusses the vitality of smart and complex digital control crucial for system normal operation. It is suggested to apply the simulation methods for assessment of control systems' survivability. The control system for electric vehicle charging stations net-work has been used for the analysis in order to provide comparative assessment of control strategies.
The paper presents a new approach for detection of broken rotor bar fault in squirrel cage induction motors operating under varying load conditions. A mathematical model used in the presented method was developed using winding function approach to provide indication references for induction motor parameters under load variation. The model shows a strong relationship between broken rotor bar fault...
Battery of a plug-in electric vehicle can be charged from a power grid at different locations. In case of charging at home location it performs a significant impact on household energy consumption and needs to be coordinated and scheduled in order to reduce peaks of power load and cost of electricity. This paper discusses coordination of in-home charging aimed to improve load factor and reduce cost...
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