collamark

Larger modularity values indicate that there most edges occur within clusters, suggesting that the clusters are sufficiently well separated to avoid edges forming between neighboring cells in different clusters.

The dendrogram itself is not particularly informative as it simply describes the order of merge steps performed by the algorithm; unlike the dendrograms produced by hierarchical clustering

The dendrogram itself is not particularly informative as it simply describes the order of merge steps performed by the algorithm; unlike the dendrograms produced by hierarchical clustering (Section 10.5),

The dendrogram itself is not particularly informative as it simply describes the order of merge steps performed by the algorithm; unlike the dendrograms produced by hierarchical clustering

The dendrogram itself is not particularly informative as it simply describes the order of merge steps performed by the algorithm; unlike the dendrograms produced by hierarchical clustering (Section 10.5),

All of these g variables are graph objects from the igraph package and can be used with any of the

downstream graph operations that do not support weights.

The resolution of clustering thus becomes dependent on the density of cells, which can occasionally be misleading if it overstates the heterogeneity in the data.

From the perspective of community detection algorithms, this effect “inflates” the high-density regions such that any internal substructure or noise is more likely to cause formation of subclusters.

这种在一个线程中，横跨若干方法调用，需要传递的对象，我们通常称之为上下文（Context），它是一种状态，可以是用户身份、任务信息等。

如何在一个线程内传递状态

Fork/Join是一种基于“分治”的算法：通过分解任务，并行执行，最后合并结果得到最终结果。

这个过程可以反复“裂变”成一系列小任务。

lambda语法

自动调用回调对象的回调方法

Future

它的方法没有返回值

当我们考虑状态容错时难免会想到精确一次的状态容错，应用在运算时累积的状态，每笔输入的事件反映到状态，更改状态都是精确一次，如果修改超过一次的话也意味着数据引擎产生的结果是不可靠的。

take-home salary