程序包 org.apache.flink.ml.recommendation.swing

类 Swing

java.lang.Object

org.apache.flink.ml.recommendation.swing.Swing

所有已实现的接口:

Serializable, org.apache.flink.ml.api.AlgoOperator<Swing>, org.apache.flink.ml.api.Stage<Swing>, org.apache.flink.ml.common.param.HasOutputCol<Swing>, org.apache.flink.ml.param.WithParams<Swing>, SwingParams<Swing>

public class Swing
extends Object
implements org.apache.flink.ml.api.AlgoOperator<Swing>, SwingParams<Swing>

An AlgoOperator which implements the Swing algorithm.

Swing is an item recall algorithm. The topology of user-item graph usually can be described as user-item-user or item-user-item, which are like 'swing'. For example, if both user u and user v have purchased the same commodity i, they will form a relationship diagram similar to a swing. If u and v have purchased commodity j in addition to i, it is supposed i and j are similar. The similarity between items in Swing is defined as

$$ w_{(i,j)}=\sum_{u\in U_i\cap U_j}\sum_{v\in U_i\cap U_j}{\frac{1}{{(|I_u|+\alpha_1)}^\beta}}*{\frac{1}{{(|I_v|+\alpha_1)}^\beta}}*{\frac{1}{\alpha_2+|I_u\cap I_v|}} $$

Note that alpha1 and alpha2 could be zero here. If one of $$|I_u|, |I_v| and |I_u\cap I_v|$$ is zero, then the similarity of i and j is zero.

See "Large Scale Product Graph Construction for Recommendation in E-commerce" by Xiaoyong Yang, Yadong Zhu and Yi Zhang.

另请参阅:

序列化表格

字段概要

从接口继承的字段 org.apache.flink.ml.common.param.HasOutputCol

OUTPUT_COL

从接口继承的字段 org.apache.flink.ml.recommendation.swing.SwingParams

ALPHA1, ALPHA2, BETA, ITEM_COL, K, MAX_USER_BEHAVIOR, MAX_USER_NUM_PER_ITEM, MIN_USER_BEHAVIOR, USER_COL

构造器概要

构造器

构造器	说明
Swing()

方法概要

修饰符和类型	方法	说明
Map<org.apache.flink.ml.param.Param<?>,Object>	getParamMap()
static Swing	load(org.apache.flink.table.api.bridge.java.StreamTableEnvironment tEnv, String path)
void	save(String path)
org.apache.flink.table.api.Table[]	transform(org.apache.flink.table.api.Table... inputs)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.flink.ml.common.param.HasOutputCol

getOutputCol, setOutputCol

从接口继承的方法 org.apache.flink.ml.recommendation.swing.SwingParams

getAlpha1, getAlpha2, getBeta, getItemCol, getK, getMaxUserBehavior, getMaxUserNumPerItem, getMinUserBehavior, getUserCol, setAlpha1, setAlpha2, setBeta, setItemCol, setK, setMaxUserBehavior, setMaxUserNumPerItem, setMinUserBehavior, setUserCol

从接口继承的方法 org.apache.flink.ml.param.WithParams

get, getParam, set

构造器详细资料

Swing

public Swing()

方法详细资料

transform

public org.apache.flink.table.api.Table[] transform(org.apache.flink.table.api.Table... inputs)

指定者:

transform 在接口中 org.apache.flink.ml.api.AlgoOperator<Swing>

getParamMap

public Map<org.apache.flink.ml.param.Param<?>,Object> getParamMap()

指定者:

getParamMap 在接口中 org.apache.flink.ml.param.WithParams<Swing>

save

public void save(String path)
          throws IOException

指定者:

save 在接口中 org.apache.flink.ml.api.Stage<Swing>

抛出:

IOException

load

public static Swing load(org.apache.flink.table.api.bridge.java.StreamTableEnvironment tEnv,
                         String path)
                  throws IOException

抛出:

IOException