Analysis of Products Customized Features

Analysis of Products Customized Features

Jahnvi Gor 1, Prof. Prashant B. Swadas2, Assi. Prof. Kanu G. Patel3

1PG Student, BVM, V.V. Nagar, Gujarat, India.

2Computer Department, BVM, V.V. Nagar, Gujarat, India.

3IT Department, BVM, V.V. Nagar, Gujarat, India.

Abstract – Opinion mining its like game of words / corpus. Different persons are handling this with their own perspective model with the help of classic technique. Here we could find some of the techniques have been seen during survey.

Keywords- Feature extraction, classification, Opinion mining, svm, k-NN.

I INTRODUCTION

The market growth of internet attracts many types of research opportunities like data mining, distributed system, etc. Among them data mining has one interesting concept that is opinion mining.

Opinion mining has mostly done at document, sentence, and corpus, feature level using various classifiers & clustering techniques. Survey has been focused on different techniques & related to improvement of lazy learning classifier. Various perspectives are used here like linguistic analysis, comparative study, keyword selection, feature extraction etc.

II CLASSIFICATION ALGORITHMS

Mainly two types are [22]: Supervised and Unsupervised classification algorithms.

Among them some commonly used classifiers are: 1 K-NEAREST NEIGHBOR ALGORITHM: [23]

Nearest neighbor Algorithm or instance based algorithm are used to find the nearest neighbor & based on this it will calculate the distance & make a class of it. As shown in figure white circle is unknown instance & red- Negative & Blue-Positive.

Figure-1: Shows the nearest neighbor

Here circle is some criteria which is predefined & red dot shows the negative point so based on this we could

see that blue is more in circle then red so unknown set are goes with blue circle class, likewise nearest neighbor algorithm work. Nearest Neighbor algorithm has various types like Modified k-NN & reduced k-NN & Weighted k- NN etc. Many of them are used for Image processing purpose & in Image mining also.

In k-NN with binary method, for large feature vector Euclidian distance doesnt work better.

2. Support Vector Machine (SVM): [1]

Given a category set, C = {+1, 1} and two pre- classified training sets, i.e[1], a positive sample set, Tr+ =

_= ni 1(di, +1) and a negative sample set, Tr – =_=ni 1(di,

1), the SVM finds a hyperplane that separates the two sets with maximum margin (or the largest possible distance from both sets) ,At pre-processing step, each training sample is converted into a real vector, xi that consists of a set of significant features representing the associated document, di. Hence,

TR +=_=ni1 (xi, +1) for the positive sample set and TR

=_= ni1 (xi, 1) for the negative sample set. In this regard, for ci =+1, w · xi + b > 0, and for

Ci = -1, w · xi + b < 0.

Hence, T +, T {ci· (w · xi + b) _ 1} becomes an optimization problem defined as follows: minimize (1/2)

||w||2, subject to ci · (w · xi + b) _1.The result is a hyper plane[1] that has the largest distance to xi from both sides. The classification task can then be formulated as discovering which side of the hyperplane a test sample falls into. From this concept [20], here they analyze the feature of product with cosine similarity function & they use this for set margin for svm select the appropriate result to show that which feature has how many positive review & how many negative review. Here, lemmatization with svm classifier is seen during survey but this concept of finding word root with [9] modified k-nearest neighbour classifier was not used to obtain the word root. So proposed is at focus.

Other techniques are also used like association rule mining

Figure-2:General Process

Here, after collecting the data from web or document or review of any product, news articles, blogs, forums etc are then pre-processed according to usage. Unnecessary alphabets are removed so parsing will be easy & than useful information related to feature level or direct & indirect level of sentence & word are analyzed to develop well trained data from this data will feed to classifier to improve accuracy. This is the general concept of opinion mining. Also author are focused now a days at building the synonymous of feature to improve classifier result also some interest in improvement towards lazy classifier have been seen so based on this proposed focus is at this direction.

Level [2]:

Figure-3: Level of Sentiment Analysis

III LITERATURE REVIEW

In opinion mining related to our work Survey shows present methods,

1Ankita Srivastava, Dr. M.P. Singh, Prabhat Kumar [9], Python & NLTK tool kit is used to perform the computation over the dataset of mobile product. After collecting the data from different site like amazon.com etc. pre-processing are performed to remove stop word, by thoroughly analyze the dictionary & create weight for each adjective ,noun ,verb, past tense , they create positive, negative, neutral data file & then in first parse after creating train set by analyzing positive & negative dataset & assign positivity score to each sentence, according to predefined margin they generate positive & negative data file, this data files are again analyzed with neutral dataset to cover high, mid, weak polar reviews & generate the sentence score. But while removing stop word explicitly negation are less considered negation are of two types content & functional, content are handled But functional are not, which might change polarity. By considering both type of negation content (i.e. worst) & functional (i.e. is not worst) result would be analyzed. Most important thing they give percentage score at previously to the whole review for once but proposed will be analyzed features; according to result will be re-ranked the sentences.

1. Pooja Kherwa, Arjit Sachdeva, Dhruv Mahajan, Nishtha Pande, Prashant Kumar Singh [21] To analyze the big amount of data author analyze the review with different approach by analyzing the data line by line & when they find sentiment word they calcuclate of average word weight & give score to feature & analyze that score with

   Google analyzer meter interestingly & also a helpful approach for manufacturer of product .But polarity shifting could be added.

2. Taysir Hassan A. Soliman, Mostafa A. Elmasry, Abdel Rahman Hedar, M.M.Doss, [20], Here Author utilize the Support Vector Machine with different cosine Similarity function & also create the feature synonym dictionary to analyze the feature of product with svm easily. This was with subjective analysis which is on direct statement but focus would be moved with explicit statement & what reverse polarity affects!? Following table shows some other survey.

IV CONCLUSION

In Opinion mining Field one will analyze result

1. by calculating the precision, Recall, Accuracy & also comparing the result with other method to measure improvement. Now a days authors are focusing on feature dictionary & also towards the improvement over classifier.

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