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A layered efficient data aggregation scheme based on compressed domain is presented and implemented to overcome the problem of excessively high amount of data transmission and excessive energy consumption in wireless sensor networks. Sensor networks are configured and their nodes are arranged in a hierarchy of multistage clusters. On this structure, collecting clusters in different levels perform...
The liver shapes are complex, pathological changes severely affect the liver shapes. In order to realize the segmentation of the boundary of liver in CT images, the liver shapes dictionary is built, the input CT images are sparse represented by the angular points in gold standard liver boundary dictionary, and the best matches is selected to be the final segmentation result. Experimental results show...
In block-matching motion estimation, the searching speed and quality depend highly on the search patterns with different shapes and sizes. In this work, we propose a novel unsymmetrical dual cross-diamond search (DCDS) algorithm, which employs unsymmetrical cross-search patterns in the initial steps and small diamond-search patterns in the subsequent steps for fast block motion estimation. The initial...
Low-density parity-check (LDPC) codes form an important subclass of error correcting coding techniques, and its implementation has been hot spot of domains such as signal process, magnetic recording or next generation communication for years. This paper proposes a configurable FPGA implementation of Partition-and-Shift LDPC decoder based on Min-Sum algorithm. An MPEG algorithm is introduced to reduce...
KEELOQ code hopping technology is a nonlinear anti-encryption algorithm designed for secure Remote Keyless Entry (RKE) systems. It combines a 66-bits transmission length, so as to prevent the system from code predicting, code grabbing and code scanning. Because of its feature of high-security, it effectively overcomes the disadvantages of the traditional fixed code technology. This paper researched...
Routing algorithm is the key part of public traffic query system. It is important in GIS applications. This paper investigates a lot of the public traffic routing algorithm, analyzes the bus transit networkpsilas characteristic, and therefore constructs a new model of the least times transfer priority algorithm based on database. The algorithm takes the least times transfer as the first goal, considering...
Based on Hilbert-Huang transform (HHT), the authors propose a practical method to extract time-varying oscillation characteristic of power system from the data measured by wide area measurement system (WAMs). The proposed method can analyze local dynamic behavior and characteristics of non-stationary nonlinear signals, better reflect the time-varying law of multi modes involved in oscillation process...
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