A Generalized Sorting Strategy for Computer Classifications

Lance, G. N.; Williams, W. T.

doi:10.1038/212218a0

Cited by 206 publications

(63 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A cluster analysis, using the classification algorithm (P = -0.3) of Lance & Williams (1966) was also computed on the 3-way tables, composed by Euclidean distance, in order to group the different variables to their respective mode.…”

Section: Year-to-year Variabilitymentioning

confidence: 99%

Spatial, seasonal and long-term fluctuations of plankton in relation to hydroclimatic features in the English Channel, Celtic Sea and Bay of Biscay

Beaugrand¹,

Ibañez²,

Reid³

2000

Mar. Ecol. Prog. Ser.

115

View full text Add to dashboard Cite

Plankton collected by the Continuous Plankton Recorder (CPR) survey were investigated for the English Channel, Celtic Sea and Bay of Biscay from 1979 to 1995. The main goal was to study the relationship between climate and plankton and to understand the factors influencing it. In order to take into account the spatial and temporal structure of biological data, a three-mode principal component analysis (PCA) was developed. It not only identified 5 zones characterised by their similar biological composition and by the seasonal and inter-annual evolution of the plankton, it also made species associations based on their location and year-to-year change. The studied species have stronger yearto-year fluctuations in abundance over the English Channel and Celtic Sea than the species offshore in the Bay of Biscay. The changes in abundance of plankton in the English Channel are negatively related to inter-annual changes of climatic conditions from December to March (North Atlantic Oscillation [NAO] index and air temperature). Thus, the negative relationship shown by Fromentin & Planque (1996; Mar Ecol Prog Ser 134: 11 1-1 18) between year-to-year changes of Calanus finmarchicus abundance in the northern North Atlantic and North Sea and NAO was also found for the most abundant copepods in the Channel. However, the hypothesis proposed to explain the plankton/NAO relationship is different for this region and a new hypothesis is proposed. In the Celtic Sea, a relationship between the planktomic assemblage and the air temperature was detected, but it is weaker than for the English Channel. No relationship was found for the Bay of Biscay. Thus, the local physical environment and the biological composition of these zones appear to modify the relationship between winter climatic conditions and the year-to-year fluctuations of the studied planktonic species. This shows, therefore, that the relationship between climate and plankton is difficult to generalise.

show abstract

Section: Year-to-year Variabilitymentioning

confidence: 99%

Spatial, seasonal and long-term fluctuations of plankton in relation to hydroclimatic features in the English Channel, Celtic Sea and Bay of Biscay

Beaugrand¹,

Ibañez²,

Reid³

2000

Mar. Ecol. Prog. Ser.

115

View full text Add to dashboard Cite

show abstract

“…In the so-called combinatorial clustering strategies, the new dissimilarities can be computed from the old ones using the Lance-Williams dissimilarity update formula [15], [16]: If A and B are merged into one cluster AB, then the dissimilarity between any other cluster C and the cluster AB is given by:…”

Section: A Linkage Methodsmentioning

confidence: 99%

Automatic Cell Detection in Bright-Field Microscope Images Using SIFT, Random Forests, and Hierarchical Clustering

Mualla

Scholl

Sommerfeldt

et al. 2013

IEEE Trans. Med. Imaging

View full text Add to dashboard Cite

Abstract-We present a novel machine learning-based system for unstained cell detection in bright-field microscope images. The system is fully automatic since it requires no manual parameter tuning. It is also highly invariant with respect to illumination conditions and to the size and orientation of cells. Images from two adherent cell lines and one suspension cell line were used in the evaluation for a total number of more than 3500 cells. Besides real images, simulated images were also used in the evaluation. The detection error was between approximately zero and 15.5% which is a significantly superior performance compared to baseline approaches.

show abstract

“…It should be noted that salinity of fresh water and seawater in sampling station was measured using portable apparatus. Of the existing clustering techniques (Lance and William, 1966;Anderson, 1971;Davis, 1973) the Weighted Pair Group (WPG) method (Davis, 1973) was used in this study.…”

Section: Methodsmentioning

confidence: 99%

Comparison of controlling mechanisms of flocculation processes in estuaries

Biati

Karbassi

2010

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

During estuarine mixing, dissolved metals come into the particulate phase due to the flocculation processes. Such processes are biologically vital. In the present study, controlling mechanisms of elemental flocculation during estuarine mixing in northern and southern estuaries of Iran in relation to the various physical and chemical parameters of waters have been compared. Except for zinc and lead, for other studied elements in Minab River, water flocculate at higher rates in comparison with the rivers flowing into the Caspian Sea. Redox potential might have negative effect on flocculation process in Minab Estuary. Contrary to rivers flowing into the Caspian Sea, in Minab River elemental flocculation is governed by dissolved organic carbon and it shows a non-liner and conservative behavior during estuarine mixing which implies that dissolved organic carbon originates from terrigenous source. The results also shows that maximum removal of elements occurs in lower salinities (1.5 to 5.8 ‰) for the rivers in North of Iran and 3.3 to 11.4 ‰ for Minab River in South of Iran. Flocculation of studied metal in different rivers results in reduction of overall metal pollution load by various percentages. The initial metal contents on river water and mean discharge of river might lead to higher flocculation rates.

show abstract

A Generalized Sorting Strategy for Computer Classifications

Cited by 206 publications

References 3 publications

Spatial, seasonal and long-term fluctuations of plankton in relation to hydroclimatic features in the English Channel, Celtic Sea and Bay of Biscay

Spatial, seasonal and long-term fluctuations of plankton in relation to hydroclimatic features in the English Channel, Celtic Sea and Bay of Biscay

Automatic Cell Detection in Bright-Field Microscope Images Using SIFT, Random Forests, and Hierarchical Clustering

Comparison of controlling mechanisms of flocculation processes in estuaries

Contact Info

Product

Resources

About