Wenjun Guo’s research while affiliated with Chinese University of Hong Kong and other places

In practical applications, the data set we deal with is typically high dimensional, which not only affects training speed but also makes it difficult for people to analyze and understand. It is known as “the curse of dimensionality”. Therefore, dimensionality reduction plays a key role in the multidimensional data analysis. It can improve the performance of the model and assist people in understanding the structure of data. These methods are widely used in financial field, medical field e.g. adverse drug reactions and so on. In this paper, we present a number of dimension reduction algorithms and compare their strengths and shortcomings. For more details about these algorithms, please visit our Dagoo platform via www.dagoovis.com.

Temporal event data such as diagnosis records of multiple demen- tia patients include both multivariate data features and temporal changes. Analyzing temporal event data can reveal changing pat- terns by time or by correlations between target data and others. It is challenging but to explore visually both of multivariate data features and temporal changes in one view. In this study, we present a novel visualization system named BubbleUp which can explore temporal event databased on machine learning methods to con rm the correlations among the data and visualizes the changing patterns by time. The usage of BubbleUp visualization system can be divided into four steps; Overall distribution, detail view, correlation base on similarity, and prediction. We evaluate the usage and effectiveness of BubbleUp visualization system through the usage scenarios.

In this study, we propose 'Dementia Tracker' which is a visualization system with 21,094 dementia records for 8 years. This system makes it easy to understand complex dementia record data. In addition, the patient's own record is not only well-read, but also can be compared with people who have similar degree of dementia through the group filter function. Therefore, the current dementia situation can be understood more easily, and the future dementia can be predicted and prevented in advance.

Levitation refers to the process of floating in the air in a stable position without physical contact points against gravity. This was a mysterious phenomenon that many have wanted to experience for many years. Such wishes are expressed in the Bible, for instance when Jesus crossed the Red Sea, and when Peter wanted to walk on water with Jesus. Such phenomena, floating in the air and walking on water, were nothing short of miracles to people. Garden Agua was devised to realize these human aspirations.