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In this paper, we present MetaStore, a metadata management framework for scientific data repositories. Scientific experiments are generating a deluge of data and metadata. Metadata is critical for scientific research, as it enables discovering, analysing, reusing, and sharing of scientific data. Moreover, metadata produced by scientific experiments is heterogeneous and subject to frequent changes,...
For those responsible for the design and implementation of a SpaceFibre network it is essential to be able to capture and view the traffic on a SpaceFibre link in order to help validate the link is operating as expected and debug the link should any unexpected behaviour be observed. STAR-Dundee Ltd have developed hardware independent SpaceFibre Link Analyser software for this purpose. This paper describes...
Providing questions with unique sequence helps to encourage participants integrity in an examination. In this study, Secure Hash Algorithm (SHA) 2 and 3 have been proposed and evaluated in a question shuffling problem for computer based test. Two strategies were tested to use the hash algorithms. The first utilized a few of the most significant digits of the hash value and the second treated all digits...
We provide a simple method, using Gröbner bases over modules, to compute multivariate polynomial greatest common divisors. The approach we show is flexible, adaptable to algebraic extensions of the rationals or prime fields, and is notably faster than prior methods that work with Gröbner bases. It can be used in situations where sparse interpolation might be difficult to implement, e.g. when there...
The article describes the problem of operation and control of the electronic generators as a part of multi apparatus systems of high-power ultrasonic action. It is shown the possibility of modernization of the standard constructional circuit of the electronic generator, it is analyzed the possibilities of the electronic generator developed for the ultrasonic apparatus of “Bulava-P” series. The methodology...
This study assesses the potential impact of high renewable generation on the spot electricity prices, generator revenue and profits in an energy-only electricity market. In particular, it presents modelling outcomes for the Australian National Electricity Market (NEM) with a range of possible renewable penetrations in 2030. It is assumed that the current reliability standard is maintained and participants...
This paper studies the impact of introducing look-ahead dispatch on locational marginal prices in real-time electricity markets. Due to the high forecast error and inter-temporal variability of renewable resources (e.g., wind and solar), many system operators are in the process of upgrading their market clearing engine from static economic dispatch-based ones to dynamic look-ahead economic dispatch-based...
It is worse that steam generator is controlled by PID which is non-minimum system with oscillation. ADRC achieves excellent control performance using nonlinear control law, but it isn't necessarily optimal when adopting standard ADRC structure and NLSEF. In this paper, we optimize the standard ADRC, the simplified ADRC without TD, the improved ADRC with NLSEF using mtfal and zzxfal based on GA. The...
In this paper, we present different designs for hardware implementation of the IEEE 802.22 Turbo-Like Interleaver. In addition to classical approaches such as direct and ROM-based implementation, a novel architecture is proposed. All of the new and classical designs are implemented using VHDL, synthesized with standard cells of a 180 nm typical CMOS technology and compared in terms of area, power,...
Firstly, this paper introduced some present solutions to the partition for automatic voltage/var control systems, and analyzed its present limitation in practice, then proposed a new partition method based on electrical distance to the generator. This method started with the reactive power source, and calculated the shortest path to the generator based on Dijkstra algorithm, then, it used both the...
Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H), which is required to operate under high mobility conditions resulting in significant Inter-carrier Interference (ICI). To mitigate ICI, several cancellation schemes have been proposed but they require reliable channel information at the receiver which is quite challenging...
Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H) which is required to operate under high mobility conditions resulting in significant Inter-Carrier Interference (ICI). Under these conditions, the conventional one-tap per subcarrier channel estimation and equalization is suboptimal since it does not account for ICI...
The standard is intended to aid the electric power industry in reporting and evaluating electric generating unit reliability, availability and productivity. It standardises terminology and indexes for reporting these performance measures. The standard was developed to overcome present difficulties in the interpretation of electric generator performance data and to facilitate comparisons between different...
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