08 2017 档案
摘要：一、题目 Description Bessie is such a hard working cow. In fact, she is so focused on maximizing her productivity that she decides to schedule her next N
阅读全文
摘要：一、最大间隔分类器 1. 函数间隔 ：$γ^{i} = y^{i}(w^{T} x + b)$， 改变w和b的量级，对分类结果不会产生任何影响，但是会改变函数间隔的大小。因此，直接对函数间隔求最大值是没有任何意义的。因为可以通过任意改变w、b的量级，使得函数间隔任意大。 Q1: 函数间隔的式子中，$
阅读全文
摘要：一、题目 Description It is a little known fact that cows love apples. Farmer John has two apple trees (which are conveniently numbered 1 and 2) in his fie
阅读全文
摘要：一、题目 Description Farmer John commanded his cows to search for different sets of numbers that sum to a given number. The cows use only numbers that are
阅读全文
摘要：一、题目 Description The cows don't use actual bowling balls when they go bowling. They each take a number (in the range 0..99), though, and line up in a
阅读全文
摘要：一、算法说明 1. 为了便于计算类条件概率$P(x|c)$,朴素贝叶斯算法作了一个关键的假设：对已知类别，假设所有属性相互独立。 2. 当使用训练完的特征向量对新样本进行测试时，由于概率是多个很小的相乘所得，可能会出现下溢出，故对乘积取自然对数解决这个问题。 3. 在大多数朴素贝叶斯分类器中计算特征
阅读全文
摘要：一、线性回归 1、批量梯度下降法 每次对参数进行一次迭代时，都要扫描一遍输入全集 算法可以收敛到局部最优值 当迭代多次之后，每次迭代参数的改变越小 2、随机梯度下降法 对于一个输入样本，对参数进行一次更新 算法通常不会收敛到局部最优值，整个过程类似在上山迂回下山，有时可能上山，有时可能下山，但算法的
阅读全文
摘要：一、题目 Description Farmer John went to cut some wood and left N (2 ≤ N ≤ 100,000) cows eating the grass, as usual. When he returned, he found to his hor
阅读全文
摘要：一、题目 Description Our chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian polo
阅读全文
摘要：一、题目 Description As a reward for record milk production, Farmer John has decided to start paying Bessie the cow a small weekly allowance. FJ has a set
阅读全文
摘要：一、题目 Description A factory produces products packed in square packets of the same height h and of the sizes 1 1, 2 2, 3 3, 4 4, 5 5, 6 6. These produc
阅读全文
摘要：一、题目 Description The cows have purchased a yogurt factory that makes world famous Yucky Yogurt. Over the next N (1 include define MAX_N 10005 using na
阅读全文
摘要：一、题目 Description Oh those picky N (1 Stall 2 .. c2 c4 .. .. Stall 3 .. .. c3 .. .. .. .. Stall 4 .. .. .. c5 .. .. .. Other outputs using the same num
阅读全文
摘要：一、题目 Description Assume the coasting is an infinite straight line. Land is in one side of coasting, sea in the other. Each small island is a point loc
阅读全文
摘要：一、算法说明 数据结构中经常需要用到各种排序算法，故参考网上代码，将九个排序算法整合在一起，以便日后使用。算法运行时，可以选择所要采用的排序算法，并会输出每一趟的排序过程，更利于对排序算法的理解。 二、运行截图 三、代码 include include include define MAX_SIZE
阅读全文
摘要：一、题目 Description Farmer John is assigning some of his N (1 include define MAX_N 25005 using namespace std; typedef pair P; int N, T; int cnt; P a[MAX_
阅读全文
摘要：一、题目 Description The cows play the child's game of hopscotch in a non traditional way. Instead of a linear set of numbered boxes into which to hop, th
阅读全文
摘要：一、题目 Description FJ and his cows enjoy playing a mental game. They write down the numbers from 1 to N (1 include using namespace std; int N, sum; int
阅读全文
摘要：一、题目 Description Given a number of distinct decimal digits, you can form one integer by choosing a non empty subset of these digits and writing them i
阅读全文
摘要：一、题目 Description Given a number of distinct decimal digits, you can form one integer by choosing a non empty subset of these digits and writing them i
阅读全文
摘要：一、题目 Description Bessie hears that an extraordinary meteor shower is coming; reports say that these meteors will crash into earth and destroy anything
阅读全文
摘要：一、题目 Description On Planet MM 21, after their Olympic games this year, curling is getting popular. But the rules are somewhat different from ours. The
阅读全文
摘要：一、题目 Description Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2 include include define MAX_N 10005 d
阅读全文
摘要：一、题目 Description Windy has a country, and he wants to build an army to protect his country. He has picked up N girls and M boys and wants to collect t
阅读全文
摘要：一、题目 Description Bessie has moved to a small farm and sometimes enjoys returning to visit one of her best friends. She does not want to get to her old
阅读全文
浙公网安备 33010602011771号