The medieval Church of Zelemér was located in the Great Hungarian Plain, approximately 200 km to the east of Budapest, the capital of Hungary. Nowadays, only the ruins of the church exist and there is no accurate...
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The medieval Church of Zelemér was located in the Great Hungarian Plain, approximately 200 km to the east of Budapest, the capital of Hungary. Nowadays, only the ruins of the church exist and there is no accurate description about the original building. The place and the church itself have religious and historical importance, its ruins and surroundings are frequently visited by tourists. There have been several discussions about a reconstruction of the building. In this paper, a three-dimensional visualization of the church is presented which has been developed in the Virtual Collaboration Arena (VirCA).
To deal with the challenge of information overload, in this paper, we propose a financial news recommendation algorithm which help users find the articles that are interesting to read. To settle the ambiguity problem,...
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To deal with the challenge of information overload, in this paper, we propose a financial news recommendation algorithm which help users find the articles that are interesting to read. To settle the ambiguity problem, a new presented OF-IDF method is employed to represent the unstructured text data in the form of key concepts, synonyms and synsets which are all stored in the domain ontology. For users, the recommendation algorithm build the profiles based on their behaviors to detect the genuine interests and predict current interests automatically and in real time by applying the thinking of relevance feedback. Finally, the experiment conducted on a financial news dataset demonstrates that the proposed algorithm significantly outperforms the performance of a traditional recommender.
In this paper a robotic representation of chemical compounds was proposed. The representation allows to model chemical molecules similarly to open-chain manipulators with tree-like structures. Transformations between ...
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In this paper a robotic representation of chemical compounds was proposed. The representation allows to model chemical molecules similarly to open-chain manipulators with tree-like structures. Transformations between known chemical representations (formats) and robotic one were established and the representations were compared to. Possible applications of the robotic representation were enumerated and illustrated on a simple example.
In the article a new approach for solving complex and highly nonlinear differential-algebraic equations (DAEs) was presented. An important kind of applications of DAE systems is modeling of biotechnological processes,...
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In the article a new approach for solving complex and highly nonlinear differential-algebraic equations (DAEs) was presented. An important kind of applications of DAE systems is modeling of biotechnological processes, which can have a very different course. An efficient solving of equations describing biotechnological industrial inlets results in better optimization of the processes and has a positive impact on the environment. Some of the mentioned processes were characterized by a highly nonlinear dynamics. To obtain the trajectories of the state numerically, the backward differentiation formula was used in the presented method. As a result, a large-scale system of nonlinear algebraic equations was obtained. To solve a such system, the inexact Newton matrix-free approach was proposed. The new algorithm was tested on a mathematical model of a fed-batch fermentor for penicillin production. The numerical simulations were executed in MATLAB using Wroclaw Center for Networking and Supercomputing.
In the article a new approach for optimal control of the multistage differential-algebraic systems was presented. A merit function based on Fletcher's augmented Lagrangian was used. The necessary optimality condit...
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In the article a new approach for optimal control of the multistage differential-algebraic systems was presented. A merit function based on Fletcher's augmented Lagrangian was used. The necessary optimality conditions for the optimal control of multistage index-1 DAE systems were stated and locally optimal solution was obtained using the inexact Newton method. The only constraints for decision variables are lower and upper bounds. The piecewise-linear projection of the constraints on control variables and both differential and algebraic variables onto the feasible box were used. The numerical simulations on a catalyst mixing problem were executed in Matlab environment using Wroclaw Centre for Networking and Supercomputing.
Pedestrian detection, which is to identify category (pedestrian) of object and give the position information in the image, is an important and yet challenging task due to the intra-class variation of pedestrians in cl...
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Online region reactive power optimization is used to reduce power bus voltage operation over limit and reduce net loss for the economy to ensure that the power grid of great significance. SVG graphics file is a standa...
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With increasingly complex of the power grid structure and increasingly user requirements of power quality, Power grid voltage reactive power optimization is still the difficult points in power system operation control...
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controllable saturation reactors are widely used in reactive power compensation. The control system of controllable saturation reactor determines adaption speed, accuracy, and stability. First, an innovative type of c...
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controllable saturation reactors are widely used in reactive power compensation. The control system of controllable saturation reactor determines adaption speed, accuracy, and stability. First, an innovative type of controllable saturation reactor is introduced. After that the control system is designed, and a self-tuning algorithm in PID controller is proposed in the paper. The algorithm tunes PID parameters automatically with different error signals caused by varied loads in power system. Then the feasibility of the above algorithm is verified by Simulink module of Matlab software. The results of simulation indicate that the control system can efficiently reduce adaption time and overshoot.
Cloud Computing is facing an increasing attention nowadays as it is present in many consumer appliances by advertising the illusion of infinite resources towards its customers. Nevertheless it raises severe issues wit...
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