/** 回收 */
private void recycling() {
List<Entry<String, Double>> list = CollectionUtil.sortMapByValue(mc.get(), -1);
Set<String> targetSet = x2mat.keySet();
String word;
for (int i = 0; i < recyclingCount; i++) {
word = list.get(i).getKey();
allFreq -= mc.get().remove(word); // 从全局中移除数字
for (String target : targetSet) {
Double r2 = x2mat.get(target).get().remove(word);
if (r2 != null) {
x2mc.add(target, -r2);
}
}
}
}
