495. Kids and Prizes Time limit per test: 0.25 second(s) Memory limit: 262144 kilobytes input: standard output: standard ICPC (International Cardboard Producing Company) is in the business of producing cardboard boxes. Recently the company organized
简单总结一下机器学习最常见的两个函数,一个是logistic函数,另一个是softmax函数,若有不足之处,希望大家可以帮忙指正.本文首先分别介绍logistic函数和softmax函数的定义和应用,然后针对两者的联系和区别进行了总结. 1. logistic函数 1.1 logistic函数定义 引用wiki百科的定义: A logistic function or logistic curve is a common "S" shape (sigmoid curve). 其实逻辑斯
C. Journey time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n cities and n - 1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other
http://blog.csdn.net/pipisorry/article/details/49515215 统计函数Statistical functions(scipy.stats) Python有一个很好的统计推断包.那就是scipy里面的stats. Scipy的stats模块包含了多种概率分布的随机变量,随机变量分为连续的和离散的两种.所有的连续随机变量都是rv_continuous的派生类的对象,而所有的离散随机变量都是 rv_discrete的派生类的对象. This modul
scipy.stats Scipy的stats模块包含了多种概率分布的随机变量,随机变量分为连续的和离散的两种.所有的连续随机变量都是rv_continuous的派生类的对象,而所有的离散随机变量都是 rv_discrete的派生类的对象. This module contains a large number of probability distributions as well as a growing library of statistical functions. Each univ
(转载请注明出处哦~) 参考链接: 1. 误差函数的wiki百科:https://zh.wikipedia.org/wiki/%E8%AF%AF%E5%B7%AE%E5%87%BD%E6%95%B0 2. 正态分布的博客:https://blog.csdn.net/hhaowang/article/details/83898881 3. StackExchange Mathematics: Why the error function is so similar to the hyperboli