并查集的模板题: #include<iostream> #include<cstdio> using namespace std; ; int fa[maxn]; int find(int x) { return fa[x] == x ? x : fa[x] = find(fa[x]); } void unite(int x, int y) { int x1 = find(x); int y1 = find(y); if (x1 != y1)fa[x1] = y1; } int m
Distant Supervision for relation extraction without labeled data 远程监督:使用未标注语料做关系抽取 1. 背景: 关系抽取(某个人是否属于某个组织等) 关系抽取中使用的3种方法: a) 监督学习 优点:准确率很高 缺点:1.手工标注金标语料代价昂贵,时间金钱上需要很大的开销,并且数量受限,得不到大量的训练数据; 2.领域受限,标注都是在一个特定的语料中,训练的系统受限于那个领域 b) 无监督学习 优点:可以使用大规模的数据
ActiveRecord::Relation是rails3中添加的.rails2中的finders, named_scope, with_scope 等用法,在rails3统一为一种Relation用法. 以下是返回ActiveRecord::Relation的方法: bind create_with distinct eager_load extending from group having includes joins limit lock none offset order preloa
User: model ; users: 表名: user_id 键值 relation: public function tasks(){return $this->belongsToMany('Task','task_id');} Task: model名: tasks:表名: task_id 键值 relation: public function ower(){return $this->belongsToMany('User','user_id');} //注意:默认情况下如果
IRelationalOperator 接口: 1. Provides access to members that determine if a certain spatial relationship exists between two geometries. Members Description Contains Indicates if this geometry contains the other geometry.前者是否包含后者! Crosses Indicates
https://en.wikipedia.org/wiki/Congruence_relation In abstract algebra, a congruence relation (or simply congruence) is an equivalence relation on an algebraic structure (such as a group, ring, or vector space) that is compatible with the structure in