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In many laser processing applications, galvanometer scanners are integrated to a larger system that creates external disturbances to the actual laser-material interaction. To reject such disturbance with feedback-based control schemes, the sampling of the output needs to be fast enough to capture all major frequency components of the disturbance. In some applications, however, the sensor's sampling...
Central pattern generators (CPGs), with a basis is neurophysiological studies, are a type of neural network for the generation of rhythmic motion. While CPGs are being increasingly used in robot control, most applications are hand-tuned for a specific task and it is acknowledged in the field that generic methods and design principles for creating individual networks for a given task are lacking. This...
Ranking and selection procedures have been successfully applied to enhance the efficiency of simulation in recent years. To further improve the efficiency, one approach is to incorporate the simulation output from across the domain into some response surfaces. In this paper, the domain of interest is divided into adjacent partitions and a quadratic regression function is assumed for the mean of the...
This paper uses the Chinese GEB IPO data from October 2009 to December 2012 to shed light on the autocorrelation of both initial returns and price update and the relations between the initial returns and price update. We find that both initial returns and price update are cyclical. These two variables are positively related. The equal-weighted average monthly initial returns are significantly positive...
In this paper, we study the cointegration relationship between the U.S. private consumption and Sino-US trade surplus based on the national income accounting identity and the supply and demand relations theory using data from December 2001 to December 2012 by the Johansen cointegration test and Granger causality test in empirical study. American families are accustomed to the lifestyle of excessive...
Speculativeness and instability of short-term capital flows would have an enormous impact on a country's financial stability and economic development. The paper summarizes the "push pull" impact of Chinese short-term capital flows mainly is: Domestic and foreign interest-rate spread, expected exchange rate, domestic capital market prices and domestic prices in commodity markets, and gains...
In this paper, we have used the data of some variables affecting current account balance and capital & financial account balance from 1985 to 2005 to generate some results. We have emphasized the Granger causality test and impulse response functions to analyze the dynamic influence of FDI to the capital and financial accounts, as well as the GNP of Pakistan. The results suggest that FDI has a...
A new calculation method for the input of the neural network ensemble prediction (NNEP) model has been developed based on the data mining technology using the feature extraction method of Empirical Orthogonal Function(EOF) and the stepwise regression method, for investigating the effect of different model input with the same dimension on the prediction capacity of the NNEP model. Taking typhoon intensity...
In RF communication design and analysis, the nonlinear effects of high power amplifier (HPA) are critical. But its AM/PM distortion is usually ignored in existing literatures for simplicity. The AM/AM and AM/PM characteristics of HPA are modeled by the power series expansion, and the theoretical expressions of out-band emission levels are derived in this paper. The predicted power spectrum of amplified...
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