This paper addresses the frequency offset estimation problem in the presence of the timing error for OFDM-based WLAN systems. When the timing error exists, the correlation value used for the frequency offset estimation could be reduced significantly due to the timing error, resulting in considerable degradation in estimation performance. In this paper, using the coherence phase bandwidth (CPB) ...

To provide a high performance and reliable big data platform, this paper proposes a comprehensive invariant-based performance diagnosis approach named InvarNetX. InvarNet-X not only covers performance anomaly detection but also root cause inference, both of which are conducted under the consideration of operation context of big data applications. The performance anomaly detection procedure is a...

REDUCTION OF MICROEMBOLI COUNT IN THE PRIMING FLUID OF

Previous research has shown that composite shape-stabilized phase change material (CPCM) has a remarkable capacity for thermal storage and stabilization, and it can be directly applied to highway construction without leakage. However, recent studies on temperature changing behaviors of CPCM and asphalt mixture cannot intuitively reflect the thermoregulation mechanism and efficiency of CPCM on a...

This memorandum surveys the empirical literature about the effects and determinants of clusters. It finds that clusters generally lead to more innovations, knowledge spillovers, faster diffusion of technologies and knowledge, and competitive advantages. The presence of a skilled labour force is the most important determinant for clusters. Other important factors for the existence of clusters ar...

In this paper we study the spectra of certain classes of Room frames. The three spectra which we study are incomplete Room squares, uniform Room frames and Room frames of type 2t. These problems have been studied in numerous papers over the years; in this paper, we complete the three spectra. In addition we find a Howell cube of type H3(6, 10). This corrects a previous claim of nonexistence of ...