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Supplying electrical energy to the load on demand, economically and with acceptable levels of reliability and service quality is the main task of a distribution system. Energy distribution reliability is important in the competition conditions in electricity markets because consumers directly supply energy. Therefore, it is not enough to estimate how reliable the distribution system is at present...
In this work, we generalise the categorical syllogistic logic in several dimensions to a relatively expressive logic that is sufficiently powerful to encompass a wider range of linguistic semantics. The generalisation is necessary in order to eliminate the existential ambiguity of the quantifiers and to increase expressiveness, practicality, and adaptivity of the syllogisms. The extended semantics...
The intersectoral model MEMMAS was developed as a tool for describing and forecasting the economy in the context of substantial changes in the external and internal conditions of its development. MEMMAS combines a multi-agent description of the economy functioning with the interbranch input-output balance methodology. This model helped to conduct the forecasting studies of the impact of Urals oil...
Addressing the conflicts of continuous ironmaking and intermittent steelmaking, the steel production process is always hard to be regarded as a whole. Most of the researches focus on the ironmaking process which is a complicated nonlinear system characterized by large scale, big hysteresis, strong distribution and random. In order to solve these difficulties, many researchers tried to propose models...
This paper presents risk analysis methodology of to determine the biogas and electricity generation potential from vinasse generated in the ethanol production process in sugarcane plants. The Monte Carlo method, associated with the Cholesky decomposition, is applied to stochastic models for the generation of synthetic time series for the random variables: (i) quantity of cane ground; (ii) quantity...
This article presents the weighted data features of the standard deviational curve (SDC). Similar data features exist for the standard deviational ellipse (SDE). This paper presents weighted data features for the SDC which include the angle of rotation, the minimum and maximum standard deviation, the area, and the circulatory index. Performed correctly, weighted features give a better use of the areal...
Based on the three-terminal interval number and the project risk theory, this paper discusses the problem of risk weighting in uncertain market decision-making, and puts forward the method of combining the grey system theory and the three-terminal interval number to determine the weight of decision-making. The best-selling weight, the unsalable weight and the normal weight are calculated by expert...
For a developing country such as India, to have the best usage of resources, public planning requires good forecasts of future trends. India's Index of Industrial Production (IIIP) is an index which conveys the status of production in the industrial sector of the economy. In this study, an artificial neural network (ANN) was applied to forecast IIIP. Accordingly, the inputs to the ANN consisted of...
Man-land relationship reflects the interdependence and interaction between man and nature. This paper gives an overview of the definition of human-land relationship and its characteristics, and analyzes the contradictions and problems in the process of exploitation and utilization of land. Combined with this basis and the guidance of the coordination theory of man-land relationship, this paper puts...
Green development strategy is an important direction of the future industrial development in China, and the green development ability of automobile manufacturing enterprises is an important indicator to measure the green development of the industry. We use external presentation layer, business support layer, core layer to further explain the relationship between the enterprise's green development...
Establishment of protected areas is one of the most important approaches for biodiversity conservation. Up to 2015, China has established 2740 sites for nature reserves with a total area of 1470300 km2, covering 14.8% of Chinese land surface. Based on remote sensing inversion, model simulation and spatial analysis methods, we analyzed spatial and temporal variations of habitat from the vegetation...
Sinter ore is the raw material of the iron and steel production. A sintering production process is with high energy consumption and large CO2 emissions. It is important to achieve the green manufacturing of the sinter ore. In this paper, an optimization and control system for the carbon efficiency (OCSCE) in the green manufacturing of the sinter ore is designed from the point of view of the maximum...
Brazilian official agricultural statistics time series data on agricultural production from 1980 until today and census data at municipality level can show trends and consequences of agricultural and sugarcane area expansion, as well as, pasture area and livestock production. Detailed analysis is needed, considering for example the geographical distribution, the types of systems involved (e.g. purely...
The expected increasing exploitation of Renewable Energy Sources (RES) is pointing out the need of models able to evaluate key indexes for resilience characterisation of power systems for different RES-based energy scenarios. In particular, the resilience of a power system to fluctuations introduced by distributed and intermittent RESs is considered, at the present time, one of the most important...
Price volatility in the natural gas markets of the United States of America and the European Union have been the subject of several studies in recent years as these markets experienced important changes. The purpose of this study is to address and discuss market factors that have influenced price behavior. For this, the annualized monthly volatility for the “Henry Hub” (US Market) and the “London...
The aim of this paper is to apply probabilistic load flow methods on a three phases, unbalanced low voltage distribution network. We use a point estimate method and a Monte Carlo simulation based method to estimate the electrical characteristics (buses voltage, phases and neutral conductors currents) of a distribution grid in presence of a large number of small size photovoltaic generators. Probabilistic...
While the majority of electricity in the Nordic and Baltic countries is traded at the day-ahead market, producers and consumers can use the intraday market to adjust their production commitments according to updated forecasts closer to the time of delivery. This reduces the need for balancing, particularly important for VRE producers, but it also means that the price formation at intraday market can...
As a reliable and flexible electric power source, hydropower can quickly adjust its generation level and provide reserve power to balance the power fluctuations in the system. In this paper, we assume that the day-ahead spot market is cleared and the obligation for each reserve type is already contracted in a preceding market. Then the question is how to make the optimal decision to determine, for...
This paper uses the data envelopment analysis method (DEA) to compare the efficiency of state-owned commercial banks, joint-stock commercial banks and urban commercial banks with 16 listed commercial banks in 2016, and points out the problems of commercial banks in China, and then put forward some suggestions.
The growing complexity of products and processes in industrial production require new methods of processing technical information and searching for new IT solutions. Fast and adequate solutions can be made on the basis of extensive information and long-term experience. This is possible when the implementation of automated systems is seen as a general-functional process in which the emphasis is placed...
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