Teacher performance is an important issue for any academic institution, so these institutions try to develop methodologies and systems to evaluate the performance of its academic staff based on measurable and scientif...
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This paper proposes and develops a small language model artificial intelligence (AI) system or chatbots capable of providing competent legal information to users within the Iraqi legal jurisprudence. One of the major ...
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Children with autism spectrum disorder (ASD) require long-term care, support, and empathy from experienced therapists. However, there is a shortage num-ber of highly experienced therapists available to provide consist...
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The main purpose of this paper is the study of the Series Active Power Filter (APF) compensation capability for different unbalance perturbations of three-phase three wire AC power systems such as voltage unbalance, p...
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ISBN:
(纸本)9781424422050
The main purpose of this paper is the study of the Series Active Power Filter (APF) compensation capability for different unbalance perturbations of three-phase three wire AC power systems such as voltage unbalance, phase-shift unbalance sags and swells. Indeed SAPF has been proved to be an effective solution to compensate for different voltage disturbances in the power system, so that the power system voltages are forced to be balanced and sinusoidal and in phase with the direct component of the power system voltage presented before compensation. The capability of the Series APF is determined by the maximum rate of the apparent power that can be delivered. The challenge now is how these equipments can be dimensioned, this leads to the evaluation of the rate of the apparent power required to achieve this compensations under such conditions. This study present a comparison based on the approaches presented by the definition of the effective apparent power as defined in ieee 1459-2000, the European school approach and the apparent power classical approach. The two first approaches were proved to be the best methods for the calculation of the apparent power presenting the suitable amount to be concerned in the design process of different devices and allow a good estimation of the Series APF dimensions with low economic burden. This paper presents some application which may be occur in the AC power systems, mainly for three-phase, three-wire AC power systems without neutral wire which can be used for the design process of the Series APF.
Optimal Power Flow (OPF) with FACTS devices place a vital role in power systems. In this paper, a proposed Non-dominated Sorting Hybrid Cuckoo Search Algorithm (NSHCSA) for multi objective optimal power flow problem w...
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ISBN:
(纸本)9781538608142
Optimal Power Flow (OPF) with FACTS devices place a vital role in power systems. In this paper, a proposed Non-dominated Sorting Hybrid Cuckoo Search Algorithm (NSHCSA) for multi objective optimal power flow problem with series FACTS devices namely Static Synchronous Series Compensator (SSSC) and Interline Power Flow Controller (IPFC) with different objective functions including the practical constraints, operating constraints and the installation cost of FACTS devices are considered for this analysis. Some heuristic rules are suggested for the optimal location of FACTS devices to reduce the number of possible locations. Cuckoo Search Algorithm (CSA) and Genetic Algorithm (GA) are combined to form the proposed Hybrid Cuckoo Search Algorithm (HCSA). The fuzzy decision making tool is used to select optimal Pareto front solution for multi objectives. The effectiveness of the proposed method is tested on ieee-30 bus test system with FACTS devices. The results are analyzed and compared with existing methods.
Developing multi-biometric systems using multi-modal signals is the recent trend in biometric identification problem. Integrating heart and brain electrical signals (ECG and EEG) is very important because of their liv...
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ISBN:
(纸本)9781538666500
Developing multi-biometric systems using multi-modal signals is the recent trend in biometric identification problem. Integrating heart and brain electrical signals (ECG and EEG) is very important because of their liveliness property and robustness against falsification. In this study, we have investigated the fusion of ECG and EEG signals from low-cost devices with multiple classifiers (KNN, LDA, and ESAVM) using wavelet domain statistical feature. After preprocessing, multiscale wavelet packet decomposition is applied to the signal (ECG/EEG) segment. Feature vectors are computed from the transformed signal using statistical descriptors, called wavelet packet statistics (WPS). ECG and EEG traits are fused at feature level, while two classifiers are fused at the decision level. An experiment with ten human subjects showed promising results of human identification using fused trait (ECG-EEG) with fused classifiers. The fused trait i.e., the fused WPS vectors from ECG and EEG signals with the fused classifier produces the highest average Fscore (90.5%), when compared with the single trait (ECG or EEG) with single classifier (54.7% with ECG;74.9% with EEG) or single trait with fused classifier (66.0% with ECG;87.3% with EEG). A brief ROC analysis also confirmed the above findings.
A CNC plotting device capable of producing or constructing mechanical components in accordance with design software.. The use of CNC machines is increasing quickly as technology in industries advances the purpose of t...
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