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The global path planning is one of key technologies of autonomous underwater vehicle's intelligent control. For the problems as low efficiency of searching optimal solution and insufficient objectives decision in path planning in three-dimensional environment, the rule of resistance and velocity is obtained first, then a new hybrid based on genetic-ant algorithm is proposed. In the new algorithm,...
With an abundance of computing resources, cloud computing systems have been widely used to elastically offload the execution of computation-intensive applications on mobile devices, leading to performance gains and better power efficiency. However, existing works have so far focused on one application only, and multiple applications are not coordinated when sending their offloading requests to the...
Content-based image retrieval often uses the integration of various features. The characteristic dimensions are up to hundreds of dimensions. The capabilities for image representation", "storage", " management far exceed that of the database. Retrieval and matching of large-scale image are the urgent problems which need to be solved. To solve the construction of image indexing...
The development of software for Electric Load Management Center (ELMC) is presented in this paper. Based on the embedded real-time operating system VxWorks, ELMC performs multiple tasks including periodic and aperiodic ones. While rate monotonic (RM) algorithm is still used to process periodic tasks, we propose a condition triggered algorithm (CTA) to schedule aperiodic tasks by using VxWorks's semaphore...
This paper presents a hybrid redundancy algorithm to improve the fault-tolerance of ARINC429, which synthesize hardware redundancy with dual channels in physical layer and information redundancy with Cycle Redundancy Check (CRC) in data link layer. The concept of failover delay is introduced to analyze the capability of error detection in this algorithm. Validations of this algorithm is obtained through...
A new cross-layer urgent bit first (CLUBF) scheduling mechanism is proposed and analyzed in the paper. The proposed algorithm focuses on cross-layer resource allocation scheme for heterogeneous services in orthogonal frequency division multiplexing access (OFDMA) downlink systems. And the CLUBF scheduling mechanism is operated over four steps: (1) traffic mapping: dividing traffic into UB (urgent...
One of the most critical issues in wireless sensor networks is represented by the limited availability of energy on network nodes; thus, making good use of energy is necessary to increase network lifetime. In this paper, we present an energy-efficient maximum lifetime (EEML) algorithm in wireless sensor networks. EEML improves energy utility by changing the activity of wireless communication module...
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