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In present and future electrical networks more and more cyber physical renewable energy infeed are to be integrated. To ensure nevertheless the safe grid operation with an increasing number of these infeeds, reliable certification is required. Due to the lack of the retroactive effects from the conventional test method, the dynamic behaviors during the test are different from the real situation. In...
Due to the need of water supply energy conservation, pressure-superposed water supply energy conservation effect was analyzed firstly. Secondly, the pressure-superposed water supply energy conservation monitoring device, which using the water pressure of municipal pipe network, was developed based on PLC, inverter, touch screen and GPRS. Finally, the energy conservation effect was tested by use of...
The response signal trends of ordinary ionization and photoelectric detectors under high altitude area were predicted using a simple model. The analysis results showed that the response trend varied with the pressure at 2nd power law for ionization detector, and 4th power law for photoelectric detector, which indicates that the signal performance of point-type smoke detector decreased with increasing...
Smoke is emitted from biomass burning every year. It affects regional air quality and long-term climate and is an important factor for fire detection of remote Sensing. An improved smoke plume detection method based on Kmeans clustering and multi-spectral threshold analysis is described in this paper. The threshold method has been developed with moderate-resolution imaging spectroradiometer (MODIS)...
Parking is one of the most important influence factors in urban roads, such as traffic safety, operating efficiency and traffic order. If the urban road system is absent of fixed parking spots, lacking of rational planning and parking management, it will result in traffic congest, evoking traffic accidents and severely reducing the capacity of traffic. This article studies the parking issues in the...
A technique for characterization of smoke particles is described. The technique was established through measurements using a polarization modulated angular scanning scatterometer to completely characterize the intensity and polarization of the scattered light. The physical and optical properties of the particles were extracted from the measured data by combining light scattering modeling. Preliminary...
Burn scar identification is usually made in order to appraise injury degree of the forest after obtaining the fire spots. The most effective remote sensing methods for burn scar identification rely upon analysis of two MODIS near-infrared (NIR) channels centered near 1.24 and 2.13 um data. Due to burned-unburned separability and apparent reflectance of the two channels, the Global Environment Monitoring...
This paper presents a new smoke concentration measurement system, which is designed based on the theory of light extinction. To implement the technique we developed, the hardware system, including a reflecting light path, balanced circuit design, and reasonable data acquisition and processing system, is constructed. In particular, a set of photodiode and preamplifier is specially applied and adjusted...
According to the characteristics of heat supply and the demands of energy-saving control, predictive control based on BP model and gold section method is proposed. BP model is trained with real data from heat supply system, and then solving control rate by gold section algorithm. This control strategy uses rolling optimization and feedback correction, it effectively overcomes the problems of time-delay,...
The study purpose was to study the nitrification and nitrogen removal performance in IAL-CHS by lab-scale experimental bulk.the removal rate of ammonium (NH4+-N) was enhanced from 5.00% to 85.70% within 24 h by inoculated nitrification sludge. Removal performance of NH4+-N and TN were evaluated in IAL-CHS, The results showed that the average removal rate of NH4+-N was 56.2%, 39.0% and 25.8% under...
The system uses nRF2401 for short-range wireless communications, GPRS for long-distance wireless communications, ARM9 for center console, Wireless Multi-sensor Fire Detector for node, and BP algorithm is used for judging the probability of fire. Wireless Multi-sensor Fire Detector is formed of the low-power electrochemical carbon monoxide sensor, photoelectric smoke detector and semiconductor temperature...
Study of integrated parameter acquisition and fusion for high-pressure water pump based on virtual instrument was carried out on software platform of LabVIEW. Multi-sensor's parameters are accessed through PCI local bus and RS-232 technology, and then information fusion is realized by three steps: multi-parameter error handling which enables accurate parameters to be acquired, applying multi-sensor...
A new electric-field cage is described, capable of generating uniform DC or quasi-static AC electric fields for sensor calibration and testing. This unique facility is a large parallel-plate capacitor with guard rings to control fringing fields. The cage dimensions and endplate voltages can be adjusted to meet the needs of a variety of experiments. The current size is 2.4 m high by 3.0 m wide (endplates)...
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