SIT772: Database and Information Retrieval - Management of Unstructured Data - Computer Science Assessment Answer

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Subject Code: SIT772 Internal Code: 1AHJJH

Computer Science Assessment Answer

TASK: Question 1  Suppose you have joined a search engine development team to design a search algorithm based on both the Vector model and the Boolean model. You have collected the following documents (unstructured) and plan to apply an index technique to convert them into an inverted index. Doc 1:Data science is an interdisciplinary field that uses scientific methods, processes, algorithms and systems  to extract knowledge and insights from data in various forms, both structured and unstructured. Doc 2:Data mining is the process of discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database systems. Doc 3:Information systems is the study of complementary networks of hardware and software that people and organizations use to collect, filter, process, create, and distribute data. Assessment Information In the process of creating the inverted index, please complete the following steps:  Remove all stop words and punctuation from the documents. The list of stop words for this task is provided as follows:
  • Is, An, That, Use, And, To, From, In, Both, Of, At, The
Create a merged inverted list including the within-document frequencies for each term. Use the index created as above to create a dictionary and the related posting file. You may like to test the inverted index by using the following keywords:
  • data, system, algorithm
Please design three Boolean queries, (for example, web AND search) and list the relevant documents for each query. Please use the Vector model to query on the inverted index, and compare the result with the Boolean model.  Question 2 (IR Evaluation)  In this question, you are required to evaluate the performance of different search engines. First, please find two search engines you are familiar with, such as Google, Bing, Yahoo!, etc. Second, please choose one target from the following list, and design two queries to search in both search engines. So both query 1 and query 2 have to be tested in both search engines.
  • Target 1: obtain the course information for SIT772.
  • Target 2: obtain the price of the new iPad.
  • Target 3: obtain the manual of installing tera term.
  • Target 4: obtain the oracle SQL tutorial.
  • Target 5: obtain the price of new Xbox one.
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