src/main/java/org/wltea/analyzer/core/LexemePath.java
int getPWeight(){
		int pWeight = 0;
		int p = 0;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			p++;
			pWeight += p * c.getLexeme().getLength() ;
			c = c.getNext();
		}
		return pWeight;		
	}
int getPWeight(){
		int pWeight = 0;
		int p = 0;
		Cell c = this.getHead();
		while( c != null && c.getLexeme() != null){
			p++;
			pWeight += p * c.getLexeme().getLength() ;
			c = c.getNext();
		}
		return pWeight;		
	}
词元位置权重
@return