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The building sector is considered a major consumer of energy among all economic sectors. It represents approximately 40 percent of energy consumption. An important energy consumer is associated with building heating systems. The main objective of this paper is to use a novel supervisory control strategy based on RBF neural networks architecture to achieve a good temperature regulation in a building...
Together with the rapidly increasing trends of smart systems, there is a clear need for integration tools of different technologies spanning from individual user to smart city conception. With 40% of total world energy consumption, building systems are put in the central focus of the area. The paper introduces modular technology integration strategy based on model predictive control and focuses on...
In this paper a charging kinetics of cross-linked polyethylene (XLPE) under electronic beam irradiation in scanning electron microscope (SEM) is quantified by the evaluation of trapped charge. The effect of thermal aging at different temperatures ranged from 80°C to 140°C is highlighted and analyzed. The variation of charging process of XLPE is monitored with measuring the influence current, leading...
Total ionizing dose effects in analog configurable application specific integrated circuits such as analog gate array and programmable analog gate array were analyzed. Dominant failure mechanisms and potentially radiation sensitive internal units were determined within −60…+125C temperature range. +125C area corresponds to the minimal radiation hardness.
In the recent years more and more attention has been directed to the study of potential application of ferrite nanoparticles as the humidity sensing materials. In this paper, we reports the humidity sensing characteristics of yttrium orthoferrite (YFeO3) nanoparticles synthesized by a mechanochemical route from mixture of Y2O3 and α-Fe2O3 powders in a planetary ball mill. Structural analysis of ultrafine...
As O-ring is widely used in GIS, research of its aging and operating life is helpful to the maintenance of GIS. In order to study the aging of O-ring and its compression set after aging, a method of aging experiment was designed. The experiment was carried out according to the method, and the results at different temperatures were collected. A data processing method is also introduced, and the results...
Using SF6 mixed gas instead of pure SF6 gas can effectively solve the problem of cryogenic liquefaction. However, it is necessary to verify the applicability of Dalton's Law of Partial Pressure when it is applied on analyzing the liquidation problem of SF6 mixed gas. In this paper, SF6/CF4 gas mixture is taken as an example to introduce a problem that if the mixture can meet requirement under temperature...
This paper discuses on the practical example the problem of thermal modelling of power LEDs used in luminaries. The proper determination of the thermal resistance is crucial for accurate computation of the device junction temperature, which determines the device operating parameters. Here, this problem is illustrated based on the analysis of power LED heating curve measurements taken for various amount...
This paper presents in detail the design and the practical realization of a dedicated stand for the transient thermal measurement of electronic devices. The stand is equipped with the dual cold plate cooling system containing thermoelectric modules which allow the precise control of boundary conditions, hence enabling a practical realization of the variable thermal resistance. This stand was thoroughly...
DC voltage measurement device is the key equipment in the DC transmission system, which is mainly used for system voltage measurement and providing voltage signals to the measuring instruments and secondary protection devices. With the rapid development of DC transmission and flexible transmission in China, DC voltage measurement device has been widely used and developed. High accuracy and high stability...
The paper will present the first results of an extended analysis based on synchronously recorded electrical and weather data, aimed to numerically evaluate the stochastic variation of transmission power losses measured on a given 400 kV line, in correlation with different environmental influence factors such as air temperature and pressure, dew point, wind speed and direction, type and amount of precipitation...
In this paper, distributed energy storage systems (DESSs) for power system frequency regulation are investigated. Due to the fact that above 95% of the electricity in Singapore is generated by combined cycle gas turbines (CCGTs), the system frequency model of Singapore based on CCGT is developed. The DESSs are utilized for system frequency regulation hierarchically. At the decentralized control level,...
We present WinATE, a new computer program to measure the electronic transport properties of materials with energy applications. The C++ program we describe here is designed with a user-friendly graphical interface to automate measurement. WinATE controls laboratory test and measurement equipment through a RS-232 serial interface. It was designed to measure electronic properties of synthesized materials...
One-class support vector machines (OCSVM) have been recently applied to detect anomalies in wireless sensor networks (WSNs). Typically, OCSVM is kernelized by radial bais functions (RBF, or Gausian kernel) whereas selecting Gaussian kernel hyperparameter is based upon availability of anomalies, which is rarely applicable in practice. This article investigates the application of OCSVM to detect anomalies...
A high-precision and temperature insensitive longrange distance measurement (DM) based on frequency detection is proposed and experimentally demonstrated. Two optoelectronic oscillators (OEOs) are grouped into a cross-referencing structure by Dense Wavelength Division Multiplexing (DWDM), which can greatly increase the measurement accuracy by reducing the influence of the environment such as temperature...
A CMOS fully-integrated Coulomb counter based on a voltage-to-frequency conversion algorithm that measures the state-of-charge (SoC) of a high-density Li-ion battery is presented. Low-side current sensing with a polarity detector is used to monitor the charging and discharging battery current. It is designed in 0.35 μm CMOS process and occupies an active area of 0.01mm2. Except for the sensing resistor...
In order to find a more accurate and stable peak-detection algorithm of FBG, a method of solving the peak position by Gaussian Fitting Algorithm based on Levenberg-Marquardt Algorithm (LM) was studied. In this paper, the principles of Gaussian fitting and Levenberg-Marquardt algorithm are described, and their calculation steps in peak searching algorithm are given. The MOI's SM125 sensor demodulator...
The single-step prediction of burning zone temperature plays an important role in the safety and stability control of cement rotary kiln. In this paper, the burning zone temperature prediction method based on least squares support vector machine is studied. First, the visual inspection device is used to detect the burning zone temperature. And then, the moving average filtering process is performed...
Lamb wave gas sensor has broad industrial application prospects in gas sensing due to its multi-mode characteristic. Lamb wave gas sensor is now still in fundamental academic research period and its performance remains to be determined and verified experimentally. However, there is a lack of test system that can fully meet the test requirements of Lamb wave gas sensor. In this paper, a test system...
This Polyimide film has excellent electrical properties and it serves as an important insulating material which is widely used in the variable-frequency motor and wind generator. Since high temperature is a significant reason for degradation in insulation, the space charge distributions of polyimide (PI) films in high temperature condition is worth investigating. Under different temperature, the conductivity...
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