Cluster strategy

D. L. Massart, L. Kaufman and K.H. Esbensen, Hierarchical non-hierarchical clustering strategy and application to classification of iron-meteorites according to their trace element patterns. Anal. Chem., 54 (1982) 911-917. 

Starting point and promising directions Convergent or cluster strategy Divergent or wildcat strategy... 

Further details of agglomerative, and several other clustering strategies may be found in the book by MASSART and KAUFMAN [1983] or, along with remarks on the treatment of situations with missing values, in the monograph by MUCHA [1992]. Finally, it may be of interest that OZAWA [1983] even proposed a hierarchical cluster algorithm based on an asymmetric distance matrix. 

On the hardware side, other speedup strategies are essentially based on the simple idea that since hardware is becoming less and less expensive, one may use many processing units instead of only one and split up the job. Parallelization and clustering strategies belong to this family either the central processors carry out many calculations at the same time, as in parallel machines, or physically separate machines actually load different parts of the total job, as happens in clusters, which may nowadays contain up to 50-100 computers. In both cases the big problem is the synchronization... 

The ability to establish relationships among the clusters has advantages in allowing for more effective clustering strategies and for broad-narrow navigation among the substances and substance clusters in the substance set. 

Cluster strategy for the first period of its development includes ... 

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