# I'm Zigang "Ivan" Xiao, an engineer in bay area. I have a cat called Moose.

I write about technical stuff in the field of computer science, with a focus on Machine Learning, my hobbies, including guitar playing and ballroom dancing, and my life in US. Some of my posts are written in Chinese.

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# 美國租車陷阱：Toll Charges

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I’ve been looking around entry-level watches for some time. Recently, I answered a question in Zhihu (Chinese Quora), and I feel like to transcribe this collection in my blog.

# Watch Review: Rodina R005GB

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So NOMOS has this awesome looking Bauhaus style watch: Tangente. Apparently everyone wants one, but not everyone wants to break their bank (\$2330 USD).

Luckily, we have an alternative here: Rodina series watches (or with Date).

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# Notes on Maximum Likelihood, Maximum a Posteriori and Naive Bayes

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Let $$\data$$ be a set of data generated from some distribution parameterized by $$\theta$$. We want to estimate the unknown parameter $$\theta$$. What we can do?