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Recommender system is an intelligent solution to information overload problem. Classical collaborative filtering based recommender system suffers from cold start and data sparsity problems. Incorporation of trust in classical recommender systems has potential to improve the overall performance of recommender system. Trust has been enormously researched and its influence is manifested in recommender...
This paper presents the design, implementation and test of a binocular measurement device for the determination of relative pose. The instrument is designed for the use with large plant parts and machinery in very harsh environments as encountered in off-shore hydrocarbon exploration, mining and tunnelling. The device is equipped with a fall-back monocular measurement procedure. This permits measurement...
In the case of electrical power networks using the RMS values for the measured voltages in order to determine its state is the accepted procedure. This method is based on the stationarity hypothesis. In this paper the validity of this hypothesis is studied based on numerical and experimental data. Practical examples of its non-validity are shown using the data aggregation algorithm.
An error index to support the validation stage of dynamic models is proposed in this paper. The result of the index quantifies the percentage of the relative difference between an experimental signal and an estimated signal. The index is calculated for several test signals, which are selected and designed to exhibit controlled differences in contrast with a reference signal. Also, other seven indexes...
An accurate localization scheme is essential to many underwater sensor applications. However, due to the persistent existence of uncertainties and measurement errors, an accurate localization is very difficult to achieve. The communication cost is much higher in underwater networks compared to terrestrial networks and this calls for more accurate localization schemes even if they involve more computational...
We are developing a quantum-based 60 Hz power standard that exploits the precision sinusoidal reference voltages synthesized by a programmable Josephson voltage standard (PJVS). PJVS systems use series arrays of Josephson junctions as a multibit digital-to-analog converter to produce accurate quantum-based dc voltages. Using stepwise-approximation synthesis, the system can also generate arbitrary...
Accuracy is perhaps the most important attribute of high-end metering. The overall accuracy of a metering installation is dependent on a combination of the accuracy of the meter and the instrumentation transformers. Optimization of the analog-to-digital converter (ADC) resolution and the time averaging period in the root mean square (rms) calculation can improve meter accuracy. This paper shows that...
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