The LC function permits overtaking behaviors, which decrease the mobility dependency between vehicles, and thus degrade the performance of clustering algorithms based on mobility metrics.
Experiments were also conducted to investigate the effects of the cluster radius in hops (i.e., the value of d) on clustering performance.
have purposed a novel algorithm that is based on combining two algorithms of clustering
: k-means and Modified Imperialist Competitive Algorithm .
of vehicles is made based on the location and using rough set theory vehicles are categorized to be in the lower and upper approximations.
Single and double clusters are almost meaningless in the viewpoint of clustering
and we call them as bad clusters.
algorithms can be generally grouped into two main classes, namely, supervised clustering
and unsupervised clustering
where the parameters of classifier are optimized.
The most popular example of density-based clustering
is DBSCAN in which only the objects whose density is greater than the given thresholds are connected together to form a cluster.
The commonly used seismicity partitioning methods include the K-Means cluster, the hierarchical cluster, the self-organizing maps (SOM), the fuzzy cluster, the Gaussian mixture model (GMM), the density-based clustering
algorithm (DBSCAN), and some other cluster means, which have been listed in Table 1.
Normally, a clustering
algorithm always needs the following steps to deal with the data: load a data set, select a few parameters, run algorithm, and then view the consequence.
is a data mining and data analysis method, that produces refined views to the in-built structure of a data set by separating it into a number of disjoints or overlapping classes.
Fuzzy set theory has played an important role in many applications, such as fuzzy clustering
analysis, fuzzy pattern recognition , fuzzy synthetic judgments , fuzzy decision and forecast [15, 16], fuzzy programming, fuzzy probability , and fuzzy statistics .