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Multi-objective optimization problems with interval (MOPs-I) uncertainties parameters are common in practice. Evolutionary multi-objective (EMO) algorithms are popularly employed to solve these problems due to their powerful explorations. The comparison strategies among interval objectives of MOPs-I are crucially important for obtaining a superior Pareto front when applying EMOs. By effectively combining...
This paper presents a two-stage stochastic programming model for provision of flexible demand response (DR) based on thermal energy storage in the form of hot water storage and/or storage in building material. Aggregated residential electro-thermal technologies (ETTs), such as electric heat pumps and (micro-) combined heat and power, are modeled in a unified nontechnology specific way. Day-ahead optimization...
Dispatch flexibility denotes the capability of electrical generation that can be dispatched to serve the load. Hydro power generation with water reservoir has favorable dispatch flexibility that can be used to mitigate the intermittency and uncertainty of photovoltaic. Hydropower and photovoltaic can be coordinated by storing water energy in the peak hours of solar and shifting it to off-peak periods...
Transfer learning framework is designed to use previously acquired knowledge to solve a new but somewhat related task (like humans do). Non-availability of sufficient and relevant information in building a learning model is a major bottleneck in this research area. However, such models are highly susceptible to negative transfer learning (NTL) during transferral of knowledge due to the hesitancy in...
A new software toolbox QWTB is presented. It aims for aggregation of high-quality algorithms required for data processing of sampled measurements. Algorithms include frequency, amplitude and phase estimators, stability quantifiers, flicker calculator etc. The toolbox unifies and simplifies user interface of algorithms and an example for every algorithm is included to help understanding. The toolbox...
This paper proposes a connector conversion technique for coaxial lines using an original adaptor up to 100 MHz. The adaptor does not contain an insulator bead between the inner and the outer conductor. Scattering parameter (S-parameter) of the adaptor was calculated from the dimensional measurement results. For verification of the method, we applied it to Type N50 to 3.5 mm adaptor. It is because...
The phase and ratio errors of transducers for distribution electrical grids can be measured, in a wide frequency range, by a synchronized couple of digitizers Agilent 3458A working in DCV mode. The high metrological performances of the digitizers is degraded by the input low pass filter cut-off frequency, which depends on the selected range. This paper proposes a technique to identify and model, for...
I will talk about the family of experiments known as precision measurement and null experiments. These experiments, often associated with the determination of a fundamental constant or the testing of one of the accepted laws of Nature at some extreme of magnitude, have always provided a challenge to both a scientist's cunning and his or her experimental skills. In my talk I will use as one example,...
A measurement comparison of scattering parameters has been carried out between four national metrology laboratories in coaxial line using 1.85 mm precision connectors at frequencies between 100 MHz and 67 GHz. Twelve devices have been measured: two pairs of short-circuits, a pair of open-circuits, a pair of matched loads, a pair of mismatched loads, a male-to-female adaptor and a T-checker. The National...
This paper presents the evaluation of uncertainty components attributed to the algorithm used to estimate sampled signal parameters. The white noise in the signal will influence the standard deviation of the estimates while signal imperfections like harmonic distortions, interharmonics and even non-white noise would produce bias, leading to non-statistical uncertainties. An a-priori knowledge of sampled...
This paper summarizes the uncertainty estimation for gallium nitride shottky diode based on vector network analyzer measurements at 5.8 GHz. The results were traceable to the metrology standard of S-parameter at NMIJ. Considering the uncertainty of the measurements, bias voltage must be applied over 2 V in measuring bias voltage dependence of reflection coefficient. The measurement uncertainty was...
The Digital Sampling Wattmeter of SP has been upgraded. New resistive shunts and dividers are built, with lower temperature coefficient and less power dependence. The aperture time of the samplers are increased. The calibration methods are also upgraded by use of more direct AC/DC calibration. The goal of 10 μW/W seems to be within reach.
This paper describes the measuring systems, setup and results of an rms and peak ac high voltage comparison performed at PTB in 2015. The three measuring systems are based on different principles. VTT system is a compressed gas capacitor based voltage divider together with a sampling voltmeter and signal processing. PTB's systems are based on the measuring of loading current of high voltage compressed...
In Costa Rica, the Laboratorio Metrológico de Variables Eléctricas (LMVE) at the Instituto Costarricense de Electricidad (ICE) develops and improves measurement capabilities to promote and support the industrial innovation and development in the country. It's a pertinent remark that the resistance standards as well as the dc voltage standards are used to determine other electrical quantities such...
This paper describes the procedure to reduce an estimation bias of interpolated DFT and single-model sine-fit algorithms. Estimation bias reduction of more than an order of magnitude is attainable. The procedure does not modify the estimation algorithm itself and additional knowledge of the measurement system or additional sampled points are not required.
Over the last decade, many studies have been conducted on the effects of mechanical vibration on the physical hormonal and neuromuscular responses of muscles: in some works the growth hormone response showed a dependence on the acceleration provided by Whole Body Vibration (WBV) platforms with respect to subjects responsiveness. Therefore the accuracy of acceleration measurements related to the excitation...
Novel measurement technologies for specific absorption rate (SAR) assessment of wireless devices have been developed using sensor arrays to dramatically reduce the measurement time compared to single-probe scanning systems. While single-probe scanning systems are optimized for low measurement uncertainty and source-independent accuracy, array systems are in widespread use for design testing and have...
This paper focuses on coverage sampling over a given region by a fleet of underwater gliders. The coverage performance is evaluated by the observing uncertainty performed by Objective Analysis (OA). Deployed gliders are commonly restricted to move through transects along which the data collected are convenient for data assimilation. We optimize the initial location and the initial heading of each...
This paper describes the issues encountered when Earned Value Management (EVM) principles are applied to a non-traditional EVM baseline and the analytical techniques developed by NASA Goddard Space Flight Center's (GSFC) ICEsat-2 project to forecast Cost Performance Index (CPI) and Schedule Performance Index (SPI) performance indices to help determine whether the project would complete within its...
In this work, we propose a framework for resolving ambiguity in user-generated natural language queries. We use pragmatics to formalize the refinement of an incoming query into possible interpretations which we call a response graph. Each of the possible interpretations are assigned likelihoods of being correct by the pragmatics framework, as well as Quality of Information (QoI) scores that quantify...
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