In this paper, we document that realized variation measures constructed from high-frequency returns reveal a large degree of volatility risk in stock and index returns, where we characterize volatility risk by the extent to which forecasting errors in realized volatility are substantive. Even though returns standardized by ex post quadratic variation measures are nearly Gaussian, this unpredict...

This paper is concerned with modeling the actions of a human operator of construction machinery and integrating this operator model into a large, complex simulation model of the complete machine and its environment. Because human operators to a large degree affect how the machine is run, adaptive operator models are a necessity when the simulation goal is quantification and optimization of prod...

This study proposes a new condition diagnosis method for rotating machinery developed using least squares mapping (LSM) and a fuzzy neural network. The non-dimensional symptom parameters (NSPs) in the time domain are defined to reflect the features of the vibration signals measured in each state. A sensitive evaluation method for selecting good symptom parameters using detection index (DI) is a...

The market liquidity plays an authoritative role in the execution of financial transaction. Since has immediate impact on trading, risk been gaining a huge attention asset pricing, corporate financing, and portfolio management. bid-ask spread is often reported significant indicator its associated cost market. This work proposes new estimation spread, namely Informed Realized Spread (IRS). IRS m...

A lot of IT solutions exist for simplification and time saving of industrial experts’ activities. However, due to large diversity of tools and case-by-case software development strategy, big industrial companies are looking for an efficient and viable information integration solution. The companies have realized the need for an integrated environment, where information is ready for extraction a...

Economists often use event study methodology to evaluate the impact of new regulations on firms before there is enough data to empirically estimate the effects. This research investigates the degree to which event study methodology can provide useful information in this regard by studying how accurately markets predict the actual benefits associated with a new law. Specifically, I utilize a uni...

Based on the current air pollution control and CO 2 emission reduction policies, this study analyzed energy structure, number of motor vehicles nonroad mobile machinery, consumption pollutant emissions in Beijing. Furthermore, diesel characteristics challenges for key fields were investigated, such as medium- heavy-duty trucks, long-distance passenger tourist vehicles, which are areas with diff...

A permutation π is realized by the shift on N symbols if there is an infinite word on an N -letter alphabet whose successive left shifts by one position are lexicographically in the same relative order as π. The set of realized permutations is closed under consecutive pattern containment. Permutations that cannot be realized are called forbidden patterns. It was shown in [J.M. Amigó, S. Elizald...

this study was conducted to determine timeliness costs in using machinery and their effects on farmers’ revenues. in addition, optimum cropping pattern was compared with the existing one assuming removal of timeliness cost. for the purpose of the study, mixed integer and linear programming methods were used. the study was conduced in marvdasht region in southern iran. the data were collected th...