Do you think that magic is simple? That some hand-waving and muttering incomprehensible blubber is enough to conjure wonderful gardens or a fireball to burn your enemies to ashes? The reality is a little more complicated than that. To master skills,…
题意 : 给出数 x (1 ≤ x ≤ 10^12 ),要求求出所有满足 1 ≤ n ≤ x 的 n 有多少个是满足 n*a^n = b ( mod p ) 分析 : 首先 x 的范围太大了,所以使用枚举进行答案的查找是行不通的 观察给出的同余恒等式,发现这个次方数 n 毫无规律 自然想到化成费马小定理的形式 令 n = i*(p-1)+j 式子化成 根据费马小定理不难证明(猜???)周期为 p*(p-1) ==> 来自 Tutorial,反正我是不知道怎么证,貌似评论下面有大神用欧拉函数来证…
Hough Transform Introduction: The Hough transform is an algorithm that will take a collection of points, and find all the lines on which these points lie. we define a line as a collection of points that are adjacent and have the same direction. In or…
http://scottsievert.github.io/blog/2015/01/31/the-mysterious-eigenvalue/ The Fibonacci problem is a well known mathematical problem that models population growth and was conceived in the 1200s. Leonardo of Pisa aka Fibonacci decided to use a recursiv…
[Real Time Rendering 5] 1.In radiometry, the function that is used to describe how a surface reflects light is called the bidirectional reflectance distribution function (BRDF). As its name implies, it is a function that describes how light is reflec…
https://www.ted.com/talks/katie_bouman_what_does_a_black_hole_look_like/transcript 00:13In the movie "Interstellar[ˌɪntərˈstelə(r)]星际的," we get an up-close look at a supermassive black hole. Set against a backdrop of bright gas, the black hole's…
Bigger update: The content of this article is now available as a full-length video course that walks you through every step of the code. You can take the course for free (and access everything else on Lynda.com free for 30 days) if you sign up with t…
Neural Networks and Deep Learning This is the first course of the deep learning specialization at Coursera which is moderated by moderated by DeepLearning.ai. The course is taught by Andrew Ng. Introduction to deep learning Be able to explain the maj…
