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This paper gives a detailed report on the correlation analysis of computer-assisted oral English test achievements with computer preference on the case study of 131 non-English majors in Wuhan Polytechnic University. Statistical analysis indicates that there is no significant correlation between these two factors, however, those who don't prefer to have tests or study English on computers score much...
The existing active power control methods which take single wind farm as a unit and regulate it independently cannot satisfy the complex control demand of large-scale wind power base. Therefore, wind farms are unitized as wind farm cluster (WFC) as a whole in this paper. An active power economic dispatch model of WFC considering short-term wind power prediction is proposed, which aims at maximizing...
Smart meter is one of the most important devices used in the smart grid (SG). The smart meter is an advanced energy meter that obtains information from the end users' load devices and measures the energy consumption of the consumers and then provides added information to the utility company and/or system operator. Several sensors and control devices, supported by dedicated communication infrastructure,...
In this paper, we introduce a new method for finding the proper size of energy storage system (ESS). This design is dedicated to reduce the size of ESS considering the uncertainty of wind speed. It considers the statistical behavior and also the state of charge (SOC) of ESS. The impact of wind uncertainty on power production and its impact on the SOC of ESS are studied. The optimization is done by...
This paper investigates the impact of fin width (, 20, and 25 nm) in a double-gate n-type FinFET on the performance and reliability of the device. Carrier conduction in the Si-fin body of FinFETs with various is also studied. The experimental results show that the threshold voltage and drain current of n-type FinFETs increases and decreases, respectively,...
Modeling and simulation technology is widely used to decision making from both practice and theory. The new development of decision making, especially decision-making for emergency event and online decision-making, raise new challenge to modeling and simulation. They require the simulation to be flexible, extensible, adaptable, compos able and strong interaction. However, most of the simulation systems...
Mountain roads sections are recognized to be crash black-spots due to their complicated road geometric and geological conditions. Traffic crash on these road sections are severe and with great difficulties to be rescued. The paper mainly conducted the in-depth crash characteristic analysis based on typical mountain road traffic accidents in China. The research is of great importance to improve traffic...
Mobility is the key device parameter to affect circuit performance in flexible thin-film transistor (TFT) technologies, and it is very sensitive to the change of mechanical strain and temperature. However, existing algorithms only consider the impact of mechanical strain in cell placement of flexible TFT circuit. Without taking temperature into consideration, mobility may be dramatically decreased...
On the basis of the daily precipitation data statistics of 17 meteorological stations from 1953 to 2010 in Jiangxi Province, this paper studied the interannual variation characteristics of maximum daily precipitation and its spatial-temporal characteristics in Jiangxi Province with the application of GIS technology and Mann-Kendall (M-K) statistic method. The results showed that there was a slightly...
A typical LIDAR (Light Detection and Ranging) scan contains hundreds of millions of points. As such, the visualization of LIDAR point clouds poses a significant challenge in data analysis. One solution is to display LIDAR point clouds on a large display wall with an array of LCD monitors. This provides researchers with a high-resolution display environment for looking at and studying large datasets...
To investigate the ripple current on the output power of solar cells, a testing system is set up to draw triangular currents with different ripples from a solar-cell panel by a boost converter operating from 10 kHz to 100 kHz. The dynamic characteristics of the solar-cell panel are analyzed based on the measured current and voltage waveforms. Experimental results indicate that the output voltage lags...
PET imaging is based on the detection in coincidence of two back-to-back annihilation photons. Implementation of coincidence detection in PET data acquisition systems usually involve energy discrimination and time discrimination. Depending on which is performed at first, the coincidence detection can be divided into two ways: energy discrimination before time discrimination (ETD) and time discrimination...
Increasing number of wind farms connected to power system calls for a simplified equivalent model of wind farm so that it can be represented by only a few equivalent wind turbines for dynamic system studies. In order to aggregate wind turbines in complex terrain or irregular layout, this paper presents a new wind turbine clustering method based on spectral clustering algorithm. The clustering principle...
Variable displacement speed regulation is a good method for hydraulic propulsion system compared with throttle speed regulation and high speed on/off valve speed regulation, however the minimum variable displacement motor we can get is about 28cc/r, which is too large for a light or medium weight ROV. The variable effective piston stroke (VEPS) motor is a kind of virtual variable displacement (WD)...
Applied in power system integrated with large scale wind farms, an equivalence method based on parameter aggregation is presented in this paper. The method is used to get parameter aggregation of equivalent model of coherent wind farms, considering the reserve of dynamic electric load at the boundary nodes. Transient stability simulation of the original system and equivalent network is conducted and...
Traditional energy determination methods with shaper circuits are not suitable for high count rates applications, for which the analog-to-digital converters (ADC) with very high sampling rate are often used to digitize the pulse signal directly. The high sampling rate ADC brings the problems of high power consumption, high data bandwidth, and less stability and so on. In this paper, an all-digital...
Ultra thin HfO2/Al2O3/HfO2 triple-layer gate dielectrics for advanced MIS capacitors have been characterized electrically. The triple-layer gate stacks after post-metal annealing (PMA) at various temperatures have been studied. Experimental results including leakage current, C-V characteristics, and TDDB are presented in this paper. It has been found that the addition of Al2O3 into HfO2 increases...
Monetary policy is the main tool to realize macro-control, it plays a very important role in impacting macroeconomic. Starting from monetary transmission mechanism, this paper researches the monetary policy transmission channel and the asymmetry. At last, it studies several research methods. The result indicates that the monetary policy indeed exists asymmetry when transmitting. Actually compared...
This paper presents a prognosis algorithm for the tension on ice-coated AC transmission lines. Firstly, the difference time sequences are built with the collected tension data on ice-coated AC transmission lines. Then the autoregressive model is applied on the obtained difference sequences and the model parameters are estimated through the Yule-Walk method. Finally, we can predict the tension on ice-coated...
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