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In this paper we present a model to predict the stock trend based on a combination of sequential chart pattern, K-Means and AprioriAll algorithm. The stock price sequence is truncated to charts by sliding window. Then the charts are clustered by K-Means algorithm to form chart patterns. Therefore, the charts form chart pattern sequences, and frequent patterns in the sequences can be extracted by AprioriAll...
In this paper, we investigate load balancing problem in 3GPP Long Term Evolution (LTE) networks and propose our solution which considers users with different Quality-of-Service (QoS) requirements. Load unbalance among neighboring cells often yields negative impacts on user experience and network performance, and it has mainly been considered for only data services without QoS guarantee. However, 3GPP...
Data centers constantly expand and upgrade their capacity due to the ever-increasing demand for remote file storage. It is estimated that around 50% of the total data center power consumption is for cooling. With this trend, a reduction in the cooling power consumption would result in a substantial reduction in overall power consumption, as well as C02 emission. With the focus going towards renewable...
The network simulation (NS) is an important issue in the study of network technology. However, The error between the network performance simulation on split-object model and the true network environment is considerable apparent. In order to obtain the NS result approaching the reality, in this paper, we analyze the structure of split-object mode and find reasons to cause the error. According to the...
A high sensitivity liquid refraction index fiberoptic sensor based on a multimode air-gap long period fiber grating is experimentally demonstrated with the sensitivity of 1063.737 nm and 702.032 nm per unit index for the sugar-solution and the salt-solution respectively.
Aggregation is among the core functionalities of OLAP systems. Frequently, such queries are issued in decision support systems to identify interesting groups of data. In conventional settings, the queries take a long time to compute (hours!) and produce massive result-sets at varying degrees of aggregation. Providing real time analysis results to Web users can enhance the utility of sites dealing...
Decoupling of multiple coupled photonic crystal waveguides are investigated numerically on the basis of self-imaging principle. An optimization way is utilized to enhance the decoupling efficiency.
Aggregation is among the core functionalities of OLAP systems. Frequently, such queries are issued in decision support systems to identify interesting groups of data. When more than one aggregation function is involved and the notion of interest is not clearly defined, skyline queries provide a robust mechanism to capture the potentially interesting points where (i) users do not need to specify a...
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