HashMap<String, Double> docVector = document.getDocVector();
			Iterator<String> termIter = query_vector.keySet().iterator();
			double dotProduct =0.0;
			while(termIter.hasNext()) {
				String term = termIter.next();
				if (docVector.containsKey(term)){
					dotProduct = dotProduct + docVector.get(term);
				}
			}
			double newScore = dotProduct;
			doc_score.put(docName, newScore);
		}