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In the stock market, return reversal happens when investors sell overbought stocks and buy oversold stocks, making the trends of the stocks' prices reverse. While existing studies mainly focused on developing theories to explain the cause of return reversal, we aim at predicting return reversal by proposing a two-stage method in this paper. In the first stage, we employ dynamical Bayesian factor graph...
Mobile Ad Hoc network is rapidly developing research area, one of the open question in this area is secure data inside the network. Encryption algorithms play a main role in information security systems. On the other side, those algorithms consume a significant amount of computing resources such as CPU time, memory, and battery power. This paper provides evaluation of three of the common encryption...
With rapid progress of 3DTV (Three-Dimensional Television) and 3D film industry, stereoscopic technology has become an increasingly important aspect of image technology in recent years. Stereoscopic 3D (S3D) image brings enhanced 3D experience to the viewer, but also may lead to visual discomfort. However, it needs to control the perceived depth of S3D image within a certain range around the screen,...
Nowadays Spark has been widely adopted as a sharp blade in solving big data problems by pipelining tasks of jobs on each node of cluster. In order to improve cluster resource utilization, lots of Spark performance-tuning advices have been proposed both by Spark and researchers. However, we notice that most of these advices focus tuning configuration items in isolation without considering job characteristics...
human life is more and more dependent on the safety, reliability and effective operation of a variety of complex networks; however, most of networks are sparse, which means the network data is incomplete. To solve the problem, various link prediction methods have been proposed to find missing links in given networks. Among these methods, similarity-based methods are effective, however, still imperfect...
In recent years, modern web applications are becoming more and more complex and it makes difficult for developers to audit the code. The number of attacks against these applications has increased rapidly. Automated detection techniques for web applications are badly in need. Execution after execution (EAR) vulnerability is a kind of logic flaws for web application. It allows the server-side execution...
Plants are essential resources for nature and people's lives. Plant recognition provides valuable information for plant research and development, and has great impact on environmental protection and exploration. This paper presents a leaf analysis system for plant identification, which consists of three main components. First, given a leaf image, a preprocessing step is conducted for noise reduction...
This paper presents a quantitative analysis of Itai's leader election algorithm using probabilistic model checking. In particular, a leading probabilistic model checker PRISM is utilized to simulate the algorithm executions. From performance analysis perspective, this paper investigates execution efficiency of this algorithm. Properties to be considered is the expected round of leader election under...
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