基因表現量矩陣被科學家運用於各種問題上，其中有用於發掘新的疾病特徵、也有用於拆解細胞組成。對於同一種疾病，常常在不同人有著不同的反應，人類的體質在疾病中扮演著多重的角色，不但影響診斷結果，也對治療之後的結果造成很大的分歧。
為了從基因表現的訊號中瞭解人類體質的自然分群結構，我們提出了迭代分群法，利用兩種分群方法，Batch effects correction with Unknown Subtypes(BUS)和sparse k-means，採取迭代的演算法，不斷的將基因表現量中不同的分群結構挖掘出來，藉此找出有關體質的分群以及重要的基因。我們蒐集大量的血液基因表現資料，進行大規模的探索性分析，最後利用gene ontology analysis解釋這些基因在生物體中扮演的角色。

The gene expression matrix has been applied to a variety of problems by scientists, including the use of tapping into the new features of disease and the disassembly of cellular components. For the same disease, it often has different reactions in different people. The human constitution plays multiple roles in the disease, which not only affects the diagnosis results, but also causes great difference on the results after treatment.
In order to understand the natural grouping structure of human constitution from the signal of gene expression, we proposed an iterative clustering method based on two methods of clustering, Sparse k-means and BUS, to detect unknown subtypes. We can detect different clustering structures in the gene expression and select feature genes for each of the structure at the same time. We collected a large amount of blood gene expression data, conducted a large-scale exploratory analysis, and finally use gene ontology analysis to explain the role of these genes.

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21. http://cpdb.molgen.mpg.de/