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Public-key cryptography protocols provide more scalability and security than symmetric-key protocols. It is assumed that public-key cryptography pair-wise key establishment protocols are not suitable for wireless sensor networks due to its high energy cost. This paper reports on the results of performance comparison of three typical pair-wise key establishment schemes that cover these protocols: SPINS,...
In China, the bank is facing a challenging design problem of credit contract based on inventory financing. The paper studies credit contracts based on stock document mortgage with two risk-neutral gamers. Our model includes the case of a bank offering loan to a cooperative retailer who mortgages its inventory to the bank to finance more inventory. The retailer faces a random demand in a single sales...
Cooperative communications can exploit the distributed spatial diversity to improve the multiple-link performance. In this paper, the average symbol error probability (SEP) is carefully investigated for the three-node relaying structure, in which the relaying protocol is amplify-and-forward, and the modulation scheme can be N-PSK or N-QAM. We first exploit the optimistic condition to derive the lower...
The CONDENSATION algorithm has attracted as it has robust tracking performance. Since the advantage of the condensation algorithm is that it is able to propagate the probability densities of many states in the search space, it is particularly useful for multiple tracking problems. However CONDENSATION still has difficulty with initialization, occlusion and real-time implementation for multiple people...
View point is a key factor in the field of gait analysis. This paper put forward a novel gait analyzing method which can avoid the affection of view points in some extent. It sponsors a new way of 3D point reconstruction from an image captured by a monocular camera with a coordinate conversion factor from the view of projective geometry through parallel restriction. In gait analysis, the human body...
A near-lossless compression algorithm for far infrared medical image is proposed based on lifting wavelet transform and histogram shifting. The algorithm can losslessly compress the data in the human body area with integrating the source data and normalizing the useless background (lossy). Experiment results show that it is an effective algorithm compared with JPEG-LS and can compress the image more...
The ability to accurately predict task running time is of great importance for interactive applications and scheduling algorithms which need to determine how to use time-shared resources in a dynamic grid environment. In this paper we present and evaluate a new method to predict the running time of tasks in a grid. The prediction of task running time is based on a novel CPU load prediction method...
In a practical computational grid system, task scheduling in local resource management normally is affected by the arrival rate of tasks and the sizes of tasks, that is, the scheduler must deal with the dynamic task flow. On the long-term viewpoint it is necessary and possible to improve the performance of the scheduler serving the dynamic task flow. In this paper we developed a scheduling strategy...
With high resolution ADC has been widespread used in communication and multimedia, oversampling Sigma-Delta ADC becomes the main path of implementing high resolution ADC. Oversampling Sigma-Delta ADC is composed of two basic blocks: a noise shaping sigma delta modulator and a digital signal processing block for filtering and decimation. This paper mainly discuss noise shaping sigma delta modulation...
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