in recent years, various time series models have been proposed for financial markets forecasting. in each case, the accuracy of time series forecasting models are fundamental to make decision and hence the research for improving the effectiveness of forecasting models have been curried on. many researchers have compared different time series models together in order to determine more efficient ...

We report average tropospheric CH4 volume mixing ratios retrieved from a 27 year time series of high spectral resolution infrared solar absorption measurements recorded between May 1977 and July 2004 at the US National Solar Observatory station on Kitt Peak (31:9 N; 111:6 W, 2.09 km altitude) and their comparison with surface in situ sampling measurements recorded between 1983 and 2004 at the C...

In this study, we used the NDVI time-series datasets to investigate variations in the starting dates of growing season (SGS) in China's cropland from 1983 to 2002. To do so, a smoothing algorithm based on an asymmetric Gaussian function was first performed on the NDVI dataset to minimize the effects of anomalous values caused by atmospheric haze and cloud contamination. The SGS of cropland was ...

Time series prediction has been studied for decades due to its potential in a wide range of applications. As one the most popular technical indicators, moving average summarizes overall changing patterns over past period and is frequently used predict future trend time series. However, traditional indicators are calculated by averaging data with equal or predefined weights, ignore subtle differ...

In this paper I present evidence that sample selection or attrition introduces very little bias into growth rate equations over time periods of approximately five to ten years. In this appendix I present the results of a time series analysis of three sets of firms (those in the sample from 1972 to 1979, from 1976 to 1983, and the combined sample from 1972 to 1983) with some confidence that thes...

This year marks a significant change in the recent history of hard disk drive development. During the final years of the last century and for the last two years the areal density of magnetic recording had been increasing at rates close to or exceeding 100% per year. That meant that each generation of hard disk drive had a digital data capacity that was close to twice that of the previous genera...