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Document clustering is an important tool for text analysis and is used in many applications. This work develops a novel hierarchal algorithm for document clustering. We are particularly interested in studying and making use of cluster overlapping phenomenon to design cluster merging criteria. In our previous papers, the theoretical results on the overlap(More)
A novel tetramethylpyrazine derivative, CXC195, has been recently shown to protect against cerebral ischemia–reperfusion (I/R) injury. However, the detailed mechanisms underlying the neuroprotection of CXC195 are still unclear. The aim of the present study was to investigate the effects of CXC195 on the phosphorylation of endothelial nitric oxide synthase(More)
Hydroxysafflor yellow A (HSYA) is the major active chemical component of the flower of the safflower plant, Carthamus tinctorius L. Previously, its neuroprotection against cerebral ischemia–reperfusion (I/R) injury was reported by anti-oxidant action and suppression of thrombin generation. Here, we investigate the role of HSYA in cerebral I/R-mediated(More)
BACKGROUND Increasing evidences suggest that innate immunity is involved in cerebral ischemia-reperfusion (I/R) injury, but the liable innate immune receptors have not been completely elucidated. Here, we explored the role of the nucleotide-binding oligomerization domain (NOD)2, a member of the cytosolic NOD-like receptor family, in acute focal cerebral I/R(More)
Previous research suggests that the effectiveness of virtual reality exposure therapy should increase as the experience becomes more immersive. However, the neural mechanisms underlying the experience of immersion are not yet well understood. To address this question, neural activity during exposure to two virtual worlds was measured by functional magnetic(More)
New magnetic recording technologies such as bit-patterned media recording (BPMR), heat (or microwave) assisted magnetic recording (HAMR) and shingled writing (SW)/two-dimensional magnetic recording (TDMR) have been proposed to push the storage density of future hard disks beyond 1Tb/in<sup>2</sup>. However, at such high recording density, many new(More)
Psoriasis has been linked to an increased risk of several co-morbidities. However, its association with chronic obstructive pulmonary disease (COPD) remains unclear. To further characterize this relationship, we conducted a systematic review and meta-analysis of case-control and cross-sectional studies that compared the risk of COPD in patients with(More)
As a natural and healthy beverage, tea is widely enjoyed; however, the pesticide residues in tea leaves affect the quality and food safety. To develop a highly selective and efficient method for the facile removal of pesticide residues, the subcritical butane extraction (SBE) technique was employed, and three variables involving temperature, time and(More)