关键词：催化、3D打印（bits to atoms）、合成自动化（atoms to bits）、机器视觉、自然语言处理

变化中的不变

The secret to that is to focus on the things that don’t change in your buisiness.
——Jeff Bezos

来源：https://medium.com/

亚马逊CEO贝佐斯有句话说，
别人都在思考未来什么会变，
他思考什么不会变。

基础知识准备的差不多了。

今天笔者准备正式开始为构建我们自己的个人搜索引擎而努力了。

Problem 20: Valid Parentheses

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

An input string is valid if:

1. Open brackets must be closed by the same type of brackets.
2. Open brackets must be closed in the correct order.

Note that an empty string is also considered valid.

如今社会纷繁而复杂，各色消息充斥眼球。虽有人向往纸醉金迷，却也有人向往平淡闲适。

不知道各位有没有思考过这样一个问题：我们从哪来？到哪去？这一切的意义到底是什么？

笔者理工科在读研究生，从高中开始嗜读科普读物，开始参加化学竞赛，与自然科学结下不解之缘。本科专业方向金属加工相关，也由于项目原因接触过能源材料相关课题（锂电、电催化），同时多次参加创新创业项目及数学建模竞赛，结识了不少不同专业的同学。因此笔者斗胆认为，相对于同龄人，本人还是具有较强的跨学科意识的，习惯于进入新的（研究）领域。

我是一个理工科在读研究生。生于父母均为经管类教授的家庭，却从高中开始嗜读科普读物，自此与自然科学结下不解之缘。

Problem 821: Shortest Distance to a Character

Given a string S and a character C, return an array of integers representing the shortest distance from the character C in the string.

Example 1:

1
2

Input: S = "loveleetcode", C = 'e'
Output: [3, 2, 1, 0, 1, 0, 0, 1, 2, 2, 1, 0]

Note:

1. S string length is in [1, 10000].
2. C is a single character, and guaranteed to be in string S.
3. All letters in S and C are lowercase.

Why are we interested in this?

These days I knew something called “Gimbal”, which offsets random movements of camera when we are videoing or shooting, in order to make smoother video. It acts like this

Also, several days before, we carefully analyze divers’ physics during diving.

机器学习相关Python库

• Tensorflow
• Keras
• Theano
• PyTorch
• LightGBM
• Numpy
• Pandas
• SciPy
• Scikits_Learn
• Eli5