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Wireless sensor network is composed of many wireless sensor nodes with the same or different functions. A typical sensor node consists of four parts: sensor unit, information processing unit, wireless communication unit and energy supply unit. In this paper, the existing ant colony algorithm is analyzed, and an improved ant colony optimization algorithm is proposed. The paper presents design of routing...
As we all known, autonomous navigation system is the basic of AUV movement, besides, accurate position estimation and reliable measurement are the keys of it. In order to avoid accumulating position errors in the long voyage by using navigation algorithm, we can depend on GPS. Due to the influence of diving and floating process, GPS data would slip. The slips affect the accuracy of navigation seriously...
This paper proposes a fully differential 10-bit energy efficient successive approximation register (SAR) analog-to-digital converter (ADC) by using incremental converting method. The voltage difference of the input between two successive samples is acquired and resolved. A judge window is properly designed, and several conversion steps of significant bits could be skipped when the voltage difference...
Security in control system is an important issue. To safety-related system it is more critical. A safety-security communication measure to counteract nature or intend data modification is proposed, which based on refining characters of data with MD5 approach. And to some low speed network a 2-refine approach is introduced which based on MD5 and CRC. A confidential communication to secure all the data...
Voting mechanism based safe function block compatible with IEC 61499 is proposed. The voting safe function block can vote the discrete or continuous parameters and get a reliable value. A new safe communication approach is proposed for not only error sensing but also error correcting. The approach use a triple data field copies to address error correcting problem, and more safety is achieved in communication...
For applications of data mining techniques in geosciences, through mining spatial databases which are constructed with geophysical and geochemical data measured in fields, the knowledge, such as the spatial distribution of geological targets, the geophysical and geochemical characteristics of geological targets, the differentiation among the geological targets, and the relationship among geophysical...
For applications of clustering algorithms, the key techniques are to handle complicatedly distributed clusters and process massive data effectively and efficiently. On the basis of analysis and research of traditional clustering algorithms, a clustering algorithm based on density and adaptive density-reachable is presented in this paper, which can handle clusters of arbitrary shapes, sizes and densities...
Three clustering methods are presented and discussed by experimental analysis. The results by using three clustering methods which are partitioning methods, hierarchical methods and density-based methods visually illustrate the clustering results, in two-dimensional data sets as experimental data are used. Clearly, when the original data set is spherical shape, most of the cluster methods can get...
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