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Linear prediction is a commonly used approach to preprocess microphone signals for estimation of time delays from an acoustic source to different microphones. A typical linear prediction algorithm employs the least squares criterion to solve an optimization problem. This criterion, however, is not optimal for non-Gaussian distributed speech signals. In this paper, we propose a sparse preprocessing...
Hadoop is one of the most important Big Data processing and storage systems. In recent years, a lot of efforts have been put to enhance Hadoop's performance from networking perspectives. However, there are limited tools that can help researchers to verify their networking algorithm design in terms of Hadoop's performance. This paper proposes Doopnet which is a framework and toolset for creating Hadoop...
Battery characteristics in the conditions with/without internal temperature gradient are believed to be different, which imposes difficulty in characterization and modeling of the performance of battery cells, and relatively few studies have conducted the investigation of the effects of thermal gradients on battery characteristics. This paper makes a preliminary study on the influence of internal...
Lithium ion battery is widely used in electric vehicles. To estimate battery state-of-charge, state-of-health and internal temperature accurately is not only in laboratory but also on-board significant. As a useful tool to study electrochemical system, numbers of estimation methods based on electrochemical impedance spectroscopy arise. The paper focuses on the relation between the battery states and...
To deal with the problem of missile attitude control in the case of multi-missile formation, a quaternion missile model, which is a second order nonlinear system, is proposed in this note. Based on the quaternion model, a two-layer sliding mode controller is designed to track the desired attitude angles for a missile to achieve the 3-missile formation flight. The special two-layer structure of the...
By using virtual reality and simulation technology, hydraulic engineering aided design is studied, which includes structures' three-dimensional simulation prototype, design knowledge base containing design criterion and optimization strategy, and human-computer interaction. According to hydraulic engineering design flow, hydraulic engineering aided design platform is developed to realize 2D and 3D...
Based on the ldquogrowth dragrdquo conceptual model of Romer, this paper computes the growth drag of water resource to agriculture through using panel data(1997~2006) of China's all provinces. The result shows the growth rate of agricultural production value fell 0.1121% per year on average because of the shortage of water resource. The number is seemingly small, but according to calculation, under...
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