/// <summary>
/// 为当前用户猜测其最可能喜欢的产品
/// </summary>
/// <param name="user">用户id</param>
/// <param name="query">用户输入的查询</param>
/// <param name="click_time">用户点击产品的时间</param>
/// <returns></returns>
static string GuessBestSku(string user, string query, DateTime click_time)
{
string[] games = WordProcessor.skuKeywords.Keys.ToArray();
Tuple <string, double, double>[] matchResults = new Tuple <string, double, double> [games.Length];
for (int i = 0; i < games.Length; ++i)
{
double wordsScore = SkuMatcher.GetSkuQuerySim(games[i], query);
double cfScore = CF.GetCFValue(games[i], user, click_time);
if (userHist.ContainsKey(user) && userHist[user].Contains(games[i]))
{
//用户不太可能点击一个他之前点击过的产品
wordsScore = 0; cfScore = 0;
}
//打分结果由两部分构成，分别是查询词得分和协同过滤得分。
matchResults[i] = new Tuple <string, double, double>(games[i], wordsScore, cfScore);
}
Sort(matchResults);
string skus = matchResults[0].Item1;
for (int i = 1; i < DISP_NUM; ++i)
{
skus = skus + " " + matchResults[i].Item1;
}
return(skus);
}
static void Main(string[] args)
{
Console.WriteLine("Loading queries...");
WordProcessor.BuildWordGraph("train");
Console.WriteLine("Building words connections...");
////WordProcessor.FindConnections();
WordProcessor.BuildGlobalEquGraph();
WordProcessor.BuildLocalEquGraph();
Console.WriteLine("Initializing CF model...");
CF.Initialize();
Console.WriteLine("Initialization finishd!");
Console.WriteLine("Begin Query");
SkuSelector.Query();
Console.WriteLine("All things have been done!");
Console.ReadLine();
}