The utilization of solar energy can be made by photovoltaic (PV) cells to generate electric power directly and solar thermal (T) panels can be applied to generate heat power. When the utilization of the solar energy i...
详细信息
The utilization of solar energy can be made by photovoltaic (PV) cells to generate electric power directly and solar thermal (T) panels can be applied to generate heat power. When the utilization of the solar energy is necessary to generate electric power, the option of using T panels in combination with some heat/electric power conversion technology can be a viable solution. The power generated by utilizing the solar energy absorbed by a given area of solar panel can be increased if the two technologies, PV and T cells, are combined in such a way that the resulting unit will be capable of co-generation of heat and electric power. In the present paper combined Photovoltaic/Thermal panels are suggested to generate heat power to produce hot water, while the photovoltaic part is used to obtain electric power mainly for covering the electric power consumption of the system, to supply the electronic control units and to operate pump drives etc. Ac and dc supplies are provided by converters for covering self-consumption and possibly the need of some household appliances. The development and design of the system is made by extensive use of modeling and simulation techniques. In the paper a part of the simulation studies, carried out to determine the energy balance in the electric energy conversion section of the system and the control structure, assuming stand-alone operation is presented.
In this work we present a comparative study, testing selected methods for clustering and classification of holter electrocardiogram (ECG). More specifically we focus on the task of discriminating between normal 'N...
详细信息
In this work we present a comparative study, testing selected methods for clustering and classification of holter electrocardiogram (ECG). More specifically we focus on the task of discriminating between normal 'N' beats and premature ventricular 'V' beats. Some of the tested methods represent the state of the art in pattern analysis, while others are novel algorithms developed by us. All the algorithms were tested on the same datasets, namely the MIT-BIH and the AHA databases. The results for all the employed methods are compared and evaluated using the measures of sensitivity and specificity.
In a virtual enterprise, how to find the best expert to share their experience and information is an important way to improve work efficiency. Semantic matching provides a basic technique to solve this problem. In thi...
详细信息
ISBN:
(纸本)9780769527512
In a virtual enterprise, how to find the best expert to share their experience and information is an important way to improve work efficiency. Semantic matching provides a basic technique to solve this problem. In this paper, semantic matching is measured by a semantic attractive force model, which is based on a domain ontology, and semantic distance computation is a core problem in semantic matching. The depth of ontology tree is considered when computing semantic distance then an agent could account semantic attractive force of optional information and chooses the best matching information to share with each other.
This work addresses the problem of detection and recognition of objects in two-dimensional images possessed by the camera which is placed on the UAV. We keen to multiple-objects, multiple-instances recognition with sc...
详细信息
ISBN:
(纸本)9806560841
This work addresses the problem of detection and recognition of objects in two-dimensional images possessed by the camera which is placed on the UAV. We keen to multiple-objects, multiple-instances recognition with scale, rotation and illumination invariance. Several approaches are discussed and some testing results are reported. Comparisons show that local descriptors based approaches outperform other approaches in the field.
In this paper we present a model of autapses which are synapses connecting axons and dendrites of the same neuron and feeding back axonal action potentials to the own dendritic tree. The timely physiological self-inhi...
详细信息
Fuzzy model identification of a system can be performed either by subjective or objective methods. Subjective methods assume the describing of system operation in statements of type If...Then... and their summarizatio...
详细信息
Fuzzy model identification of a system can be performed either by subjective or objective methods. Subjective methods assume the describing of system operation in statements of type If...Then... and their summarization in a fuzzy relation. The objective methods are performed in an experimental approach. The second class is a common one and assumes fuzzy model identification without an expert. This presumes an estimation algorithm for the fuzzy relation of a system based on an input-output data set. The paper presents an approach for identification of fuzzy relation based on square prediction error minimization and the results achieved through simulation on the Box-Jenkins data set
This paper provides a new analytical robust stability checking method of fractional-order linear time invariant interval uncertain system. This paper continues the authors' previous work (Chen et al., 2005a) where...
详细信息
ISBN:
(纸本)9783902661128
This paper provides a new analytical robust stability checking method of fractional-order linear time invariant interval uncertain system. This paper continues the authors' previous work (Chen et al., 2005a) where matrix perturbation theory was used. For the new robust stability checking, Lyapunov inequality is utilized for finding the maximum eigenvalue of a Hermitian matrix. Through numerical examples, the usefulness and the effectiveness of the newly proposed method are verified.
In a virtual enterprise, how to find the best expert to share their experience and information is an important way to improve work efficiency. Semantic matching provides a basic technique to solve this problem. In thi...
详细信息
In a virtual enterprise, how to find the best expert to share their experience and information is an important way to improve work efficiency. Semantic matching provides a basic technique to solve this problem. In this paper, semantic matching is measured by a semantic attractive force model, which is based on a domain ontology, and semantic distance computation is a core problem in semantic matching. The depth of ontology tree is considered when computing semantic distance then an agent could account semantic attractive force of optional information and chooses the best matching information to share with each other
The tristability that a class of two-dimensional neuron models may exhibit is investigated in this paper. One proposition and three corollaries on saddles, which play an important role in the dynamics of these models,...
详细信息
The tristability that a class of two-dimensional neuron models may exhibit is investigated in this paper. One proposition and three corollaries on saddles, which play an important role in the dynamics of these models, are proposed and proved using the properties of the Poincare index. Two combinations with three stable states are attained numerically and analyzed geometrically based on INa, p+ IK-model. They are used to interpret visual illusions, and their physiological potentialities and relationship with the short-term memory are discussed.
Rapid development of microcontrollers (and hand in hand cost reduction) enahle us to construct cheaper and/or more powerful digital tuners (as can he seen on the market). This publication shows possible methods how fo...
详细信息
Rapid development of microcontrollers (and hand in hand cost reduction) enahle us to construct cheaper and/or more powerful digital tuners (as can he seen on the market). This publication shows possible methods how for modern microcontrollers - how to cheaply detect tone frequency on microcontrollers.
暂无评论