/// <summary>
/// 判断键是否为有效关联键
/// </summary>
/// <typeparam name="T">泛型，具体类型由调用者传入</typeparam>
/// <param name="keyHead">相邻键中首项</param>
/// <param name="keyTail">相邻键中尾项</param>
/// <param name="objMemoryBondColl">相邻字典</param>
/// <returns>返回是否判断的结果：true、相邻项有关；false、相邻项无关</returns>
/// <remarks>判断标准：共享键概率 > 单字概率之积 </remarks>
public static bool IsBondValid <T>(T keyHead, T keyTail, MemoryBondColl <T> objMemoryBondColl)
{
//如果相邻项任何一个不在相邻字典中，则返回false 。
if (!objMemoryBondColl.Contains(keyHead) || !objMemoryBondColl.Contains(keyTail))
{
return(false);
}
//分别获得相邻单项的频次
double dHeadValidCount = CalcRemeberValue <T>(keyHead, objMemoryBondColl);
double dTailValidCount = CalcRemeberValue <T>(keyTail, objMemoryBondColl);
//获得相邻字典全库的总词频
double dTotalValidCount = objMemoryBondColl.MinuteOffsetSize;
if (dTotalValidCount <= 0)
{
return(false);
}
//获得相邻项共现的频次
MemoryItemColl <T> objLinkColl = objMemoryBondColl[keyHead].LinkColl;
if (!objLinkColl.Contains(keyTail))
{
return(false);
}
double dShareValidCount = CalcRemeberValue <T>(keyTail, objLinkColl);
//返回计算的结果
return(dShareValidCount / dHeadValidCount > dTailValidCount / dTotalValidCount);
}
/// <summary>
/// 将相邻两项（邻键）添加到集合中
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="keyHead"></param>
/// <param name="keyTail"></param>
/// <param name="objMemoryBondColl"></param>
public static void UpdateMemoryBondColl <T>(T keyHead, T keyTail, MemoryBondColl <T> objMemoryBondColl)
{
if (!objMemoryBondColl.Contains(keyHead))
{
MemoryBondMDL <T> bond = new MemoryBondMDL <T>();
bond.KeyItem.Key = keyHead;
bond.LinkColl.OffsetTotalCount = 0;
bond.LinkColl.MinuteOffsetSize = objMemoryBondColl.MinuteOffsetSize;
objMemoryBondColl.Add(bond);
}
MemoryBondMDL <T> objBondMDL = objMemoryBondColl[keyHead];
MemoryItemMDL <T> mdl = objBondMDL.KeyItem;
double dRemeberValue = MemoryDAL.CalcRemeberValue(objMemoryBondColl.OffsetTotalCount - mdl.UpdateOffsetCount, objMemoryBondColl.MinuteOffsetSize);
mdl.TotalCount += 1; //累加总计数
mdl.ValidDegree = CalcValidDegree <T>(mdl, dRemeberValue); //计算成熟度
mdl.ValidCount = mdl.ValidCount * dRemeberValue + 1; // 遗忘累频=记忆保留量+1
mdl.UpdateOffsetCount = objMemoryBondColl.OffsetTotalCount; //更新时的偏移量
MemoryItemColl <T> objLinkColl = objBondMDL.LinkColl;
objLinkColl.OffsetTotalCount = objMemoryBondColl.OffsetTotalCount;
UpdateMemoryItemColl(keyTail, objLinkColl);
objMemoryBondColl.OffsetTotalCount += 1;
}
/// <summary>
/// 计算邻键尾项记忆剩余量
/// </summary>
/// <typeparam name="T">泛型，具体类别由调用者传入</typeparam>
/// <param name="keyHead">相邻两项的首项</param>
/// <param name="keyTail">相邻两项的尾项</param>
/// <param name="objMemoryBondColl">邻键集合</param>
/// <returns>返回记忆剩余量</returns>
public static double CalcRemeberValue <T>(T keyHead, T keyTail, MemoryBondColl <T> objMemoryBondColl)
{
if (!objMemoryBondColl.Contains(keyHead))
{
return(0);
}
MemoryBondMDL <T> objBondMDL = objMemoryBondColl[keyHead];
MemoryItemColl <T> objLinkColl = objBondMDL.LinkColl;
return(CalcRemeberValue <T>(keyTail, objLinkColl));
}
/// <summary>
/// 计算邻键首项记忆剩余量
/// </summary>
/// <typeparam name="T">泛型，具体类别由调用者传入</typeparam>
/// <param name="key">相邻两项的首项</param>
/// <param name="objMemoryBondColl">邻键集合</param>
/// <returns>返回记忆剩余量</returns>
public static double CalcRemeberValue <T>(T key, MemoryBondColl <T> objMemoryBondColl)
{
if (!objMemoryBondColl.Contains(key))
{
return(0);
}
MemoryBondMDL <T> objBondMDL = objMemoryBondColl[key];
MemoryItemMDL <T> mdl = objBondMDL.KeyItem;
double dRemeberValue = MemoryDAL.CalcRemeberValue(objMemoryBondColl.OffsetTotalCount - mdl.UpdateOffsetCount, objMemoryBondColl.MinuteOffsetSize);
return(mdl.ValidCount * dRemeberValue);
}
/// <summary>
/// 清理邻键集合，移除低于阈值的邻键
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="objMemoryBondColl"></param>
/// <param name="dMinValidValue"></param>
public static void ClearMemoryBondColl <T>(MemoryBondColl <T> objMemoryBondColl, double dMinValidValue = 1.28)
{
for (int k = objMemoryBondColl.Count - 1; k >= 0; k--)
{
if (objMemoryBondColl[k].KeyItem.ValidCount < dMinValidValue)
{
objMemoryBondColl.RemoveAt(k);
}
else
{
ClearMemoryItemColl <T>(objMemoryBondColl[k].LinkColl, dMinValidValue);
}
}
}