Harvester open publications of NAS Ukraine
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2350 research outputs found
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Usage of modelling tools for determining optimal parameters of programme execution on video graphics accelerators
No full text A toolkit for modelling heterogeneous Grid systems with video accelerators gpusim has been developed and used to simulate the time of solving the gravitational problem of interaction of N bodies, which depends on the parameter. The simulation tools allow to choose the most optimal parameter value in an automated mode and at the same time significantly reduce the time of parameter selection compared to the direct execution of the program.Problems in programming 2013; 2: 23-3
Algebra of algorithms with the data and forecasting of computing process
No full textThe algebraic apparatus is developed focused on the description of algorithms with data at the expense of use of k-valued logic conditions and forecasting of computing process.Problems in programming 2011; 3: 3-1
Optimization of parallel perceptron for central processing units
No full textThe problem of efficient implementation of multi-layered perceptron is examined for central processing units of the type of i686. Facilities of optimizationby speed of tasks of computation and learning of perceptron on these processors with the use of multithreading and parallel instructions are offered.Prombles in programming 2011; 3: 23-2
Hibrid approach to processing incomplete stream data in distributed real-time systems
No full textThe article considers the problem of processing incomplete streaming data in distributed real-time systems, in particular in the context of data mining. It is noted that traditional methods of imputation are ineffective in conditions of limited resources, high requirements for processing speed and dynamic nature of streams. A hybrid approach combining federated learning, contextual imputation and adaptation to conceptual drift is proposed. The method allows local distributed computing nodes to train lightweight imputation models on their own data, followed by centralised aggregation, backpropagation of the global model and its dynamic updating. Experimental verification on a real dataset has shown the advantages of the approach in terms of accuracy (RMSE, MAE) and network load compared to the baseline methods. The obtained results prove the effectiveness of the proposed method in distributed environments with limited computing resources.Prombles in programming 2025; 2: 112-12
Сoordinated description of algorithms within the framework of algebraic vehicle
No full textThe possibility of the concerted description of management streams is shown, data and informative connections in the process of algorithms’ development facilities of the tribasic algebraic system (algebras of algorithms with data) is shown (in most general case). The properties of the got charts of algorithms are rotined.Prombles in programming 2014; 2-3: 29-3
Formalized designing and generation of parallel program for numerical weather forecasting task
No full textAlgebra-algorithmic specifications for meteorological forecasting algorithms were developed using the integrated toolkit for designing and synthesis of programs. Sequential and parallel programs for solving the task of weather forecasting for the territory of Ukraine. The results of the experiment of parallel program execution on a graphics accelerator are also provided.Prombles in programming 2014; 2-3: 72-8
Comparative characteristics of methods of object-relational mapping
No full textWe describe a method to create object-relational transformation components by using code generation system to automatically generate persistence layer based on the database structure. Text template engine is used to generate SQL queries, business classes and APIs to access data from application code. There was done a comparison of the C-Gen system and Entity Framework and demonstrated high efficiency of proposed approach.Prombles in programming 2014; 2-3: 173-18
Software solution for electrocardiogram storage and analysis
No full textSoftware solutions for medical and healthcare fields are becoming increasingly popular due to advancements in information technology. Over the past decades peak detection algorithms as well as detection of other segments on ECG, arrhythmias detection and other pathologies detection algorithms achieved significant accuracy. This study proposes an approach for integrating such algorithms into a unified systems by developing a software solution that analyzes available ECGs from various sources, standardizes them into a common format, and provides detailed reporting that is easily understandable for medical experts or patients. The implementation is carried out as a web application that can provide users with information about cardiograms, process ECGs depending on the integrated algorithms, store necessary ECG segments, diagnostic results, and more. The system incorporates a newly developed algorithm for detecting R-peaks and visualizing ECG signals processed by the algorithm with annotations obtained both automatically and with the participation of cardiology specialists.Prombles in programming 2024; 4: 43-5
Вплив передпосівної радіаційної обробки насіння на продуктивність рослин Matricaria chamomilla L.
No full textThe study aimed to determine the effect of radiation exposure on the productivity of the above-ground mass of different cultivars of Matricaria сhamomilla L. under the conditions of using fertilizing biological preparations. The cultivars M. chamomilla ‘Perlyna Lisostepu’ (Ukraine) and ‘Goral’ (Slovenia) were used in the study. Pre-sowing X-ray irradiation of seeds was carried out at doses of 5, 10, 15, and 20 Gy with a power of 1.42 cGy/s. In the variants with fertilizing, biological preparations of BTU Biotech Company (Ukraine) were used, which contain a complex of nitrogen-fixing, phosphorus-potassium mobilizing, and fungicidal bacteria: “Groundfix”, “Gumifriend”, “Helprost”, “Organic-balance”, and “Liposam”. Pre-sowing irradiation of seeds in doses of 10 and 15 Gy stimulated an increase in inflorescence productivity. The collection of air-dry mass of inflorescences was the largest in the cultivar ‘Goral’ for irradiation in doses of 10 and 15 Gy and amounted to 153 and 152 g/m2. Under the conditions of plant feeding with organo-mineral preparations, dry inflorescences of 175 and 170 g/m2 were obtained in the variants of 10 and 15 Gy, respectively. Thus, after 10 Gy dose absorption, the yield of raw materials increased by 70 % compared to the reference sample. The introduction of a complex of biological preparations stimulated an increase in plant productivity: in the cultivar ‘Perlyna Lisostepu’, inflorescences of 82 g/m2 were collected for feeding, which is 82 % more than in the reference sample (45 g/m2); in the variety ‘Goral’ the yield of dry inflorescences increased by 8–20 %. In the budding phase, the largest above-ground mass was formed at doses of 10 Gy in the cultivars ‘Perlyna Lisostepu’ (26.22 g/plant) and ‘Goral’ (16.66 g/plant). Also, the largest underground mass and number of lateral shoots were formed under the influence of treatment at 10 Gy in the cultivars ‘Perlyna Lisostepu’ (1.82 g/plant and 6.4 pcs. respectively) and ‘Goral’ (1.04 g/plant and 4.0 pcs.). Irradiation of seeds and treatment with a complex of biological preparations stimulate a significant increase in the yield of chamomile inflorescences. The largest above-ground and underground mass, as well as lateral shoots of M. сhamomilla cultivars ‘Goral’, ‘Perlyna Lisostepu’ were formed under irradiation at doses of 10 and 15 Gy in the budding phase. Pre-sowing X-ray irradiation of seeds is an effective method of increasing the productivity of M. сhamomilla plants
Metaheuristic methods for optimizing the quality of service of composite web services
No full textWith the advent of service-oriented architectures, it has become possible to register, invoke, and aggregate web services based on their identical quality of service attributes to create composite web services with added value that meet user needs. However, the rapid introduction of new web services into a dynamic business environment can negatively affect their quality of service. Therefore, the question of how to capture, aggregate, and use information about the quality of service of individual web services to obtain an optimal end-to-end quality of service of a composite web service is currently one of the priority research areas in software engineering and service-oriented computing. This paper presents the basic theoretical information necessary to understand the importance, multifacetedness, and complexity of the problem of web service composition taking into account their quality of service, as well as a representative overview of the use of methods global optimization metaheuristic, which have been the dominant methods for solving this problem over the past two decades. The purpose of the work is to draw the attention of students and the scientific community to the current problems of web service composition that arise in the Internet of Things, cloud computing, social networks, mobile computer and smartphone technologies, etc., and to involve them in active participation in solving these problems.Problems in programming 2025; 3: 3-1