Logistic Regression

Written by  on October 6, 2018

逻辑斯谛回归因为其易于实现,可解释性强,已经成为了工业界应用最广泛的机器学习算法。这篇文章主要讨论的是二项逻辑斯谛回归 (binominal logistic regression),以下简称LR。

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Written by  on September 28, 2018

Money is not evil by itself. It’s just paper with perceived value to obtain other things we value in other ways. If not money – what is evil you may ask?

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Written by  on August 18, 2018


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Written by  on August 14, 2018

POJ3020 Antenna Placement Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 10821 Accepted: 5324 Description The Global Aerial Research Centre has been allotted the task of building the fifth generation of mobile phone nets in Sweden. The most striking reason why they got the job, is their discovery of a new, highly noise resistant, antenna. It is called 4DAir, and comes in four types. Each type can only transmit and receive signals in a direction aligned with a (slightly skewed) latitudinal and longitudinal grid, because of the interacting electromagnetic field of the earth. The four types correspond to antennas operating in the directions north, west, south, and east, respectively. Below is an example picture of places of interest, depicted by twelve small rings, and nine 4DAir antennas depicted by ellipses covering them.

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Written by  on August 14, 2018

POJ3041 Asteroids Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 26141 Accepted: 14134 Description Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The grid contains K asteroids (1 <= K <= 10,000), which are conveniently located at the lattice points of the grid.

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Written by  on July 14, 2018


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Apache Storm 踩坑精选

Written by  on April 13, 2018

Apache Storm,俗称 Hadoop Real-Time,最近给整了整,东西是好,但是因为没有老司机带,按照惯例踩了不少坑,在此记录以备忘。

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Written by  on November 12, 2017

在打开Android Studio 项目的总是会卡在 Shell 1 gradle: resolve dependencies ':classpath'

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Codeforces #879C

Written by  on November 6, 2017

879C C. Short Program time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Petya learned a new programming language CALPAS. A program in this language always takes one non-negative integer and returns one non-negative integer as well.

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Speech of Steve Jobs from Apple Special Event 2017

Written by  on September 13, 2017

There’s lots of ways to be, as a person. And some people express their deep appreciation in different ways. But one of the ways that I believe people express their appreciation to the rest of humanity is to make something wonderful and put it out there and you never meet the people, you never shake their hands, you never hear their story or tell yours, but somehow in the act of making something with a great deal of care and love, something is transmitted there. And it’s a way of expressing to the rest of our species our deep appreciation. So we need to be true to who we are and remember what’s really important to us. That’s what’s going to keep Apple, Apple, is if we keep us, us.

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