Automatic Generation
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2022 ◽  
Vol 12 (2) ◽  
pp. 596
Apostolos G. Papakonstantinou ◽  
Stavros A. Papathanassiou

Efficient storage participation in the secondary frequency regulation of island systems is a prerequisite towards their complete decarbonization. However, energy reserve limitations of storage resources pose challenges to their integration in centralized automatic generation control (AGC). This paper presents a frequency control method, in which battery energy storage systems (BESSs) participate in automatic frequency restoration reserve (aFRR) provision, through their integration in the AGC of an island system. A local state of charge (SOC) controller ensures safe operation of the BESS in case of disturbances, without jeopardizing system security when available energy reserves are diminishing. The aFRR participation factors of regulating units are altered when the storage systems approach their SOC limits, re-allocating their reserves to other load-following units. Restoration of BESS energy reserves is achieved by integrating SOC regulation in the real-time economic dispatch of the system, formulated as a mixed-integer linear programming problem and solved every few minutes to determine the base points of the AGC units. A small autonomous power system, comprising conventional units, renewable energy sources and a BESS, is used as a study case to evaluate the performance of the proposed method, which is compared with alternative approaches to secondary regulation with BESS participation.

2021 ◽  
Vol 4 (2) ◽  
pp. 77-84
Peter Ndegwa Ndirangu ◽  
Elizaphan Maina Muuro ◽  
John Kihoro

The examination is a key activity in determining what the learner has gained from the study. Institutions of higher learning (IHL) perform this activity through various assessment methods (test/examination, practical, etc.). The world today is focused on automation of exam generation which is ongoing with dire need during this period of the COVID-19 pandemic when education is greatly affected, leading to embracing online learning and examination. A text/exam comprises questions and answers that focus on evaluation to determine the student’s conversant level in the area of study. Each question has a cognitive level as described by (Armstrong, 2016) in the revised Bloom’s taxonomy. Questions chosen have cognitive levels based on the level of study and standardization of the exam. There is, therefore, a need to consider the question’s cognitive level along with other factors when generating an examination by incorporating deep learning algorithms.

2021 ◽  
Vol 13 (3) ◽  
pp. 87-95
Julian Malaka ◽  
Mariusz Hetmańczyk ◽  

So far, in computer-aided modelling programs, there have not been implemented tools for the automatic generation of a dynamic model of an elastic belt transmission, created in the form of a multibody system. The publication presents reflections on this issue. There were developed scripts allowing one to automatically obtain the appropriate arrangement of links with respect to each other and to create the desired mechanical relations between or among them and other drive elements in the simulation. The programming bases of the proposed solutions were presented. Theoretical concepts were supported by application experiments in the Siemens NX environment. The method for the automatic generation of a multibody model of the toothed belt transmission, based on the geometric model of the latter, was developed. The work enabled the formulation of the conclusions on the development of modelling of the systems under consideration. The results of the research indicate high potential of the presented achievements. They constitute a basis for increasing the degree of computer technique aid for constructors or analysts.

M. T. Grancharova-Hristova ◽  
N. S. Moraliyska ◽  
К. N. Rusev ◽  
V. A. Ivanova ◽  
V. V. Tabakova-Komsalova

The article discusses the application of digital libraries, including a network of ontologies and structured databases, in the education of students in secondary schools. The multi-agent platform of VES (the Virtual Educational Space) is presented, based on the reference architecture of ViPS (the Virtual Physical Space), which is being developed in the DeLC (the Distributed e-Learning Center) laboratory of the University of Plovdiv “Paisii Hilendarski”. The information and data in VES are supported by a hybrid structure of ontologies and databases, as the designed services are supported by intelligent agents and personal assistants. Through the interaction between these intelligent components, some functionalities are modeled such as conducting virtual excursions in the teaching of various school subjects, automatic generation of tests and surveys, development of project tasks, game-based training, etc.

Disabilities ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 19-27
Howard Kaplan ◽  
Anna Pyayt

There are multiple studies demonstrating that 3D printed maps are important to people with blindness. When designed properly, they help users by improving safety and mobility and allow people with blindness to efficiently learn spatial information from the map and plan their travel prior to navigation. However, tactile maps are still not widely among people with blindness, as they are not readily available to them. Creating maps for each person needing a map of a certain location currently requires help from an individual with advanced technical training. They need to use specialized software for 3D models that personnel from disability services and family members of people with blindness usually have no experience with. The goal of this research is to design and implement software that can be used for the automatic generation of maps and be accessible to the general public. Our hypothesis is that by automating all the challenging steps (generation of the 3D model and drawing of optimally designed symbols), this will lead to increased usability and acceptance. Here, we demonstrated an early prototype and evaluated our hypothesis in a user study. To assess the success of this approach, participants answered questions about the process, usability, and social impacts of the software. Overall, participants liked the application because it was easy to use and allowed them to create custom maps with appropriate tactile-encoding features that provide meaningful information to the end user.

Vladimir Ivanov ◽  
Valery Solovyev

Concrete/abstract words are used in a growing number of psychological and neurophysiological research. For a few languages, large dictionaries have been created manually. This is a very time-consuming and costly process. To generate large high-quality dictionaries of concrete/abstract words automatically one needs extrapolating the expert assessments obtained on smaller samples. The research question that arises is how small such samples should be to do a good enough extrapolation. In this paper, we present a method for automatic ranking concreteness of words and propose an approach to significantly decrease amount of expert assessment. The method has been evaluated on a large test set for English. The quality of the constructed dictionaries is comparable to the expert ones. The correlation between predicted and expert ratings is higher comparing to the state-of-the-art methods.

2021 ◽  
Vol 63 (2) ◽  
pp. 247-260
K.N. MOHAN ◽  

An ‘Integrated Automatic Aviation Meteorological Instrument System’ (IAAMS) is installed atMumbai International Airport in May-2008. The system is State-of-the-Art and has features like automatic generation ofaviation reports; METAR / SPECI, AFTN (Aeronautical Fixed Telecommunication Network) connectivity fordissemination of aviation weather reports to user agencies and ATIS (Automatic Terminal Interface System) forautomatic broadcasting of aviation weather reports to airborne pilot. Besides these features system is having facility toenter manually weather parameter for which sensors are not available such as cloud coverage, past weather, presentweather for generation of aviation reports. The system meets the requirements of operational desirable accuracy ofInternational Civil Aviation Organization (ICAO, 2004) and vector averaging of winds as per World MeteorologicalOrganization guidelines (WMO, 1992). The paper is mainly focusing on the different technical features of this newsystem along with its observational response in last one year at Mumbai airport. Similar system has been installed at othermajor airports; New Delhi (4 sites), Chennai, Hyderabad, Bangalore, Amritsar, Jaipur, and Guwahati. The system issupplied and installed by Telvent Company, Australia.

2021 ◽  
Vol 11 (24) ◽  
pp. 11978
Gonçalo Amaro ◽  
Filipe Moutinho ◽  
Rogério Campos-Rebelo ◽  
Julius Köpke ◽  
Pedro Maló

As service-oriented architectures are a solution for large distributed systems, interoperability between these systems, which are often heterogeneous, can be a challenge due to the different syntax and semantics of the exchanged messages or even different data interchange formats. This paper addresses the data interchange format and data interoperability issues between XML-based and JSON-based systems. It proposes novel annotation mechanisms to add semantic annotations and complement date values to JSON Schemas, enabling an interoperability approach for JSON-based systems that, until now, was only possible for XML-based systems. A set of algorithms supporting the translation from JSON Schema to XML Schema, JSON to XML, and XML to JSON is also proposed. These algorithms were implemented in an existing prototype tool, which now supports these systems’ interoperability through semantic compatibility verification and the automatic generation of translators.

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