March, 2017

 

美国斯坦福大学发布2025计划 颠覆全球高等教育

2017-03-30 09:40:39 来源: 网易教育 《斯坦福大学2025计划》在以设计思考理论著称的斯坦福大学设计学院牵头下正式启动,这次教育改革改变了以往自上而下的方式,代之以师生为主导......


脆弱之道——布琳布朗的“脆弱心经”

二月 25, 2012 JOY LIU         在晦暗无明的心碎时刻,我们总被告知不要脆弱;在耻辱与苦痛的挣扎中,我们痛恨和否定的是自己的脆弱;在绝望和恐惧交织的紧缩和炙热中,我们最希望......


如何做好TEDTALKS这样的顶级演讲?

五月 29, 2013 LAWRENCE治钧         最近,Chris Anderson 先生在《哈佛商业周刊》发表了名为《如何做顶尖级演讲》(“How to give a killer......


TensorFlow 2. Shadow CNN example for MNIST data

The practice is to understand how Tensorflow applied to shadow NN in MNIST data. The practice is from Big Data University lectures. Reference: Support_Vector_Machines.html  (Coursera Machine Learning Course) Big Data University TensorFlow course Deep Learning Concept  Using multiple process layer with non-linear algorithm to simulate brain ability;  A branch of machine learning. We will focus on shadow NN in this note. Shadow NN MNIST Example: two or three layers only. In the context of supervised learning, digits recognition in our case, the learning consists of a target/feature which is toRead More

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TensorFlow 101C. Image Texture

This Note is for image texture explanation: Reference  https://courses.cs.washington.edu/courses/cse576/book/ch7.pdf  (computer vision) Why Texture Texture gives us information about the spatial arrangement of the colors or intensities in an image. Why? The answer is the histogram can’t fully represent/classify images. All images below are half white and half black. However, the images are different. How to recognize texture Structural approach: Texture is a set of primitive texels in some regular or repeated relationship. Statistical approach: Texture is a quantitative measure of the arrangement of intensities in a region. Statistical method Co-occurrenceRead More

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TensorFlow 3. A Small and Interest word2vec NN example to start your adventure

The note intention is to understand the word2vec, and how to build a small NN to start your adventure on Deep Learning. You can see many source codes here to build the NN. But I am not yet built it with TF. Reference: A visual toy NN network for word2vec generation. The whole source code is from https://ronxin.github.io/wevi/.  The source code is written by javascript for NN with html and svg (https://www.tutorialspoint.com/d3js/d3js_introduction_to_svg.htm) for graph visibility.  Try your best to understand all thoroughly (not just well enough). It will help youRead More

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TensorFlow 101B. CNN Concept

The note is to understand the concept/rise of CNN. Reference: http://colah.github.io/posts/2014-07-Conv-Nets-Modular/ Introduction convolutional neural network Lot’s of same neurons, similar as java function, which can be re-use X is the input layer (you can sense that is see/hear/smell, etc. for example, image, video, audio, document) Next Layer is not always fully connected with previous layer:  one neuron of type A neuron is not fully connected to each X.    B is not fully connected with All A  F is fully connected with all B Why so many same neurons? ThatRead More

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比尔·盖茨北大演讲:中国年轻人处在一个绝佳时代

2017-03-24 21:03:43 来源: 南方都市报(深圳) 比尔·盖茨北京大学演讲稿全文(2017年3月24日)) 中国的未来:创新、慈善与全球领导力   很高兴来到北大,特别是在北大即......


TensorFlow 101A. Manual Convolution Calculation

The note is to describe how to calculate Convolution via manual or TensorFlow command. TensorFlow convolution common commands: y= np.convolve(x,h,”valid”) and y= np.convolve(h,x,”valid”)  are same…also true for “same”,”full” options. from scipy import signal as sg   sg.convolve is using FFT which is faster than np.convolve for big matrix convolution inverse = numpy.linalg.inv(x)  One dimension with zero padding When we apply kernel, we always use kernel’s inverse to multiply and sum. One dimension without zero padding  One dimension filter with multiple dimensions of input x= [[255,   7,  3],    Read More

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灣區SAT分數最高的十大高中排名

灣區哪些高中的SAT大學入學試平均分數最高?目前SAT考試滿分是1,600分。San Francisco Business Times根據Niche網站提供的數據所做的報導顯示,SAT成績最好的......