This project uses several machine learning models to predict reservation cancellation. Among them, DART in LightGBM beats other competitors with highest testing accuracy (table) and also other metrics.

This issue is related to Sklearn, one solution is to state a eligible Solver .

For .reindex , from 0.21.0, .loc or [] are not allowed to index with a list with one or more missing labels in Pandas。

There are two complementary perspectives on the importance of friendship maintenance, particularly in the U.S. college-aged population. First, relationships help generate social capital (Lin,1999) and are important components of psychosocial development for emerging adults (Sullivan, 1953). For the college-age populations, sites like Facebook may play a vital role in maintaining relationships that would otherwise be lost as these individuals move from the geographically bounded networks of their hometown. Second, there is also growing evidence that Internet use in general, and social network sites like Facebook in particular, may be associated with a person's sense of self-worth and other measures of psychosocial development, although the positive or negative contributions of Internet use to psychological well-being are hotly debated (Kraut, Patterson, Lundmark, Kiesler, Mukhopadhyay, & Scherlis, 1998; Kraut, Kiesler, Boneva, Cummings, Helgeson, & Crawford, 2002; Shaw & Gant, 2002; Valkenburg et al., 2006).

Social capital broadly refers to the resources accumulated through the relationships among people (Coleman, 1988). Social capital is an elastic term with a variety of definitions in multiple fields (Adler & Kwon, 2002), conceived of as both a cause and an effect (Resnick, 2001; Williams, 2006). Bourdieu and Wacquant (1992) define social capital as ‘‘the sum of the resources, actual or virtual, that accrue to an individual or a group by virtue of possessing a durable network of more or less institutionalized relationships of mutual acquaintance and recognition’’ (p. 14). The resources from these relationships can differ in form and function based on the relationships themselves.

Using stylus for Chrome scroll bars in any websites： 1. In stall stylus plugin in Chrome to customize, 2. Create a new style in stylus and select “apply to all pages”：

I decide to copy-paste a sentence as the first article.