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Mining Web Graphs for Recommendations.

Platform : DATA MINING

IEEE Projects Years : 2012

Mining Web Graphs for Recommendations.




                   As the exponential explosion of various contents generated on the Web, Recommendation techniques have become increasingly indispensable. Innumerable different kinds of recommendations are made on the Web every day, including music, images, books recommendations, query suggestions, etc. No matter what types of data sources are used for the recommendations, essentially these data sources can be modeled in the form of graphs. In this paper, aiming at providing a general framework on mining Web graphs for recommendations, (1) we first propose a novel diffusion method which propagates similarities between different recommendations; (2) then we illustrate how to generalize different recommendation problems into our graph diffusion framework. The proposed framework can be utilized in many recommendation tasks on the World Wide Web, including query suggestions, image recommendations, etc. The experimental analysis on large datasets shows the promising future of our work.












Existing System:




                               The last challenge is that it is time-consuming and inefficient to design different recommendation algorithms for different recommendation tasks. Actually, most of these recommendation problems have some common features, where a general framework is needed to unify the recommendation tasks on the Web.  Moreover, most of existing methods are complicated and require tuning a large number of parameters.








                        It is becoming increasingly harder to find relevant content and what user recommends the actual thing.




Proposed System:




                    In order to satisfy the information needs of Web users and improve the user experience in many Web applications, Recommender Systems. This is a technique that automatically predicts the interest of an active user by collecting rating information from other similar users or items. The underlying assumption of collaborative filtering is that the active user will prefer those items which other


Similar users prefer the proposed method consists of two stages: generating candidate queries and determining “generalization/specialization” relations between these queries in a hierarchy. The method initially relies on a small set of linguistically motivated extraction patterns applied to each entry from the query logs, then employs a series of Web-based precision-enhancement filters to refine and rank the candidate attributes.








               (1) It is a general method, which can be utilized to many recommendation tasks on the Web.


              (2) It can provide latent semantically relevant results to the original information need.


              (3) This model provides a natural treatment for personalized recommendations.


              (4) The designed recommendation algorithm is scalable to very large datasets.








             Query Suggestion Algorithm.


1. A converted bipartite graph G = (V + V ,E) consists of query set V + and URL set V . The two directed edges are weighted using the method introduced in


Previous section.


2: Given a query q in V +, a subgraph is constructed by using depth-first search in G. The search stops when the number of queries is larger than a predefined number.


3: As analyzed above, set α = 1, and without loss of generality, set the initial heat value of query q fq(0) = 1 (the choice of initial heat value will not affect the suggestion results). Start the diffusion process using f(1) = Rf(0).


4: Output the Top-K queries with the largest values in vector f(1) as the suggestions.








  1. Posting the opinion
  2. Image Recommendation Technique
  3. Rating Prediction
  4. Ranking Approach
  5. Collaborative Filtering
  6. Query Suggestion




Posting the opinion:




                                   In this module, we get the opinions from various people about business, e-commerce and products through online. The opinions may be of two types. Direct opinion and comparative opinion. Direct opinion is to post a comment about the components and attributes of products directly. Comparative opinion is to post a comment based on comparison of two or more products. The comments may be positive or negative.




Image Recommendation Technique:




                                                   Another interesting recommendation application on the Web is image recommendation. Focus on recommending interesting images to Web users based on users’ preference. Normally, these systems first ask users to rate some images as they like or dislike, and then recommend images to the users


Based on the tastes of the users. However, the quality of recommendations can be evaluated along a number of dimensions, and relying on the accuracy of recommendations alone may not be enough to find the most relevant items for each


User, these studies argue that one of the goals of recommender systems is to provide a user with highly personalized items, and more diverse recommendations result in more opportunities for users to get recommended such items. With this motivation, some studies proposed new recommendation methods that can increase the diversity of recommendation sets for a given individual user. They can give the feedback of such items.














Rating Prediction:




                                 First, the ratings of unrated items are estimated based on the available information (typically using known user ratings and possibly also information about item content) using some recommendation algorithm. Heuristic techniques typically calculate recommendations based directly on the previous user activities (e.g., transactional data or rating values). For each user, ranks all the predicted items according to the predicted rating value      ranking the candidate (highly predicted) items based on their predicted rating value, from lowest to highest (as a result choosing less popular items.




Collaborative Filtering:




                                 User-based approaches predict the ratings of active users based on the ratings of their similar users, and item-based approaches predict the ratings of active users based on the computed information of items similar to those chosen by the active user.






Ranking Approach:




                                   Ranking items according to the rating variance of neighbors of a particular user for a particular item. There exist a number of different ranking approaches that can improve recommendation diversity by recommending items other than the ones with topmost predicted rating values to a user. A comprehensive set of experiments was performed using every rating prediction technique in conjunction with every recommendation ranking function on every dataset for different number of top-N recommendations.




Query Suggestion:




                          In order to recommend relevant queries to Web users, a valuable technique, query suggestion, has been employed by some prominent commercial search engines. This extends the original query with new search terms to narrow down the scope of the search. But different from query expansion, query suggestion aims to suggest full queries that have been formulated by previous users so that query integrity and coherence are preserved in the suggested queries.










                  HARDWARE REQUIREMENTS:


                                 System: Pentium IV 2.4 GHz


                                 Hard Disk: 40GB


                                 Ram: 512 MB


                     SOFTWARE REQUIREMENTS:                                    


  Microsoft visual studio 2008


  SQL server 2005












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