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Incorporating synchrophasor technologies into realtime operations greatly increases system operators' situational awareness of grid activities. In this paper, we present a suite of software system (named Grid Stability Awareness System — GSAS) to monitor and analyze power grid real-time stability using wide-area synchrophasor measurements. GSAS consists of five analytical and monitoring tools including...
Air pollution has become one of the most pressing environmental issues in many countries, including China. Finegrained PM2:5 particulate data can prevent people from long time exposure and advance scientific research. However, existing monitoring systems with PM2:5 stationary sensors are expensive, which can only provide pollution data at sparse locations. In this paper we demonstrate for the first...
The heat transfer enhancement of Longitudinal Vortex (LV) is a kind of technology with efficiency is high and resistance is low. The effective influence distance of LV is very important to extend this kind of technology in narrow rectangular channels under water medium. CFX10.0 is used to simulate this question, and three velocity components of water flow have been used to define the strength of LV...
This paper presents a cross-platform solution of smartphone-based mobile sink for wireless sensor networks, named uSink. With a cross-platform SD card, named uSD card, any smartphone with SD interface can be empowered with the capability to communicate with wireless sensor nodes. Furthermore, a middleware on mobile phone, named uSinkWare, is also designed to provide a typical mobile sink's functionalities,...
City night light environment can bring us some good or bad influences, therefore science management on it can promote night life quality and service environment. Functions of night light environment management for cities development, including the night economic stimulation, the night light pollution control, the night life and traffic security guarantee, were discussed. Evaluation of night light...
Similarity-based time-series retrieval has been a subject of long-term study due to its wide usage in many applications, such as financial data analysis, weather data forecasting, and multimedia data retrieval. Its original task was to find those time series similar to a pattern (query) time-series data, where both the pattern and data time series are static. Recently, with an increasing demand on...
The paper discusses a new idea of the multi-dimensional characteristic ellipsoid (CELL) approach to monitor dynamic behavior of an interconnected power system using phasor measurement unit (PMU) measurement. The multi-dimensional minimum volume enclosing ellipsoid (MVEE) is extracted based on phasor measurements to represent the feature of dynamic behavior of power systems. The orientation matrix...
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