Neural Network

Neural Network

基础的神经单元 参数功能$x_i$输入的n维度的向量$w_i$加权的系数$b$偏置$z$$\Sigma_{i=1}^{n} w_ix_i+b$ 的值$h(z)$经过激活函数得到的一个范围在0-1之间的数$a$作为输入向量x传给下一个神经元思想:用无限多的神经元节点来模拟任何函数 神经网络的训练过程 目的 训练出对于每个神经元节点最佳的$w$和$b$ BP 算法 求出参数$b$和$w$的导数,当倒数为0时,loss function值最小,与期望值越接近 神经网络分类 卷积神经网络 通常用于图像识别 步骤 1. 以一个固定的大小在图像上滑动,卷积操作
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Matrix Linear Regression

Matrix Linear Regression

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Getting started with Python 2

Getting started with Python 2

For and Else

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for x in range(6):
print(x)
if x==2: break
else: print("over") # this line will skip if last line exists

Pass

There cannot exist any blank within for and if else. We must use pass to avoid the mistake.

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for x in [1,2,3,4]:
pass
print("over")
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Linear Regression

Linear Regression

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Getting started with Python 1

Getting started with Python 1

What’s new for me * Do not need to declare variables * indentation replaces curly braces to divide code blocks Grammar Assigning value to multiple variables 1 x, y, z = 1, 2, "hello" Define a global variable in local function 1 2 3 def myfunc(): global x x = "fantastic" Change the
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Summary of 2019 VEX Robotics World Championship

Summary of 2019 VEX Robotics World Championship

VEX 2019世锦赛总结


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难忘的一次经历。

久别重逢

作为刚刚转入国际班的新生,我很荣幸被韩老师选中参加VEX2019世锦赛。赛前,有激动、欣喜,也有紧张与茫然。VEX,于我而言是一个既熟悉又陌生的竞赛项目。初中时在韩老师的带领下参加了“一网打尽”和“星光璀璨”两个赛季,也收获了很多。本以为与VEX在此分道扬镳,没想到如今的久别重逢。与熟悉的金属结构件相遇、与机器人对抗电机高速旋转的齿轮声相遇,更重要的,更重要的是与初中时有着共同热爱与梦想的同学们和老师重逢。这一切都让我激动不已,就像是星星之火在无数个暴风雪夜之后重新成为熊熊烈火一样,照亮了我的心。

当然,新的问题接踵而至。VEX推出了全新的V5主控套装,新的编程环境,这一切都是需要我去学习和尽快掌握新的知识;这里有了更多陌生的面孔,有身经百战的学姐和学长、还有已经征战将近一个赛季的国一的同学们。而我,作为一个新加入机器人社团大家庭的人,如何让大家认识我、了解我、信任我是亟待解决的问题。

在赛前,我努力地尝试编写自动程序,当小球被精准地吸入机器人的储球仓时、当小球射中旗杆的那一刹那,那种久违的激动与喜悦再次涌上心头,每一行代码,都是自己思考过后的体现,每一次正确编译和执行,都有着小小的成就感。

我找回了那种感觉,拾起了彼时的梦想,找寻到了志同道合的朋友们。同时也学习了新的知识,结识了新的朋友,更有了新的体悟。

我们在一起

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HIT REFRESH

HIT REFRESH

It’s my first blog in English.

There are tremendous things to say, but I deem that I don’t have enough time.

Firstly, I made a decision that maybe the first I made by myself. It’s also why I use English. I have transferred to international class. I want to go abroad.

There are many reasons cause this decision. I think the major one is that I went to Seattle, US in winter vacation. I really prefer the atmosphere there and I got a feeling of unrestrained. And now the life here is fantastic. I can talk to foreign teacher freely and meet a group of friendly classmates and teachers.

I live in the dorm. It’s unprecedented for me to sleep on time and get up on time. Every day I feel energetic and optimism.

Just like return to the primary school life. I really enjoy it. Also, it has a lot of challenges. I face to TOEFL test and many other tests.

That’s all.

By the way, I will go to Chicago in April. Hope everything will be OK!

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