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Robust Outlier Detection Techniques for Skewed Distributions and Applications to Real Data

Thesis Info

Access Option

External Link

Author

Iftikhar Hussain Adil

Program

PhD

Institute

International Islamic University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2011

Thesis Completion Status

Completed

Subject

Islamic economics

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/1810

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725334556

Similar


Most of the data sets belonging to the real world contain observations at the extremes that might not be in conformity with the remaining data set. These extreme observations known to be outliers might have positive or negative effect on the data analysis like regression estimates, forecasting and ANOVA etc. Outliers are powerful tools to identify the most interesting events of the world in cross sectional data and historically important events can be picked by detecting outliers in time series data sets. Numerous outlier detection techniques have been proposed in the literature. This study provides a survey of these techniques and their properties. Most of these techniques work well under the assumption that data come from a symmetric distribution and these techniques fail to work in skewed distributions. Because of this limitation, Hubert and Vandervieren (2008) proposed a technique for outlier‟s detection in skewed data sets. Our thesis presents a new technique to measure robust skewness (SSS) and a new outlier detection technique (SSSBB) for skewed data distributions. The study shows that the proposed technique measures skewness more accurately than existing techniques and the proposed technique for outlier‟s detections works better than Hubert‟s technique on a class of theoretically skewed and symmetric distributions. The study also compares the technique with other established outlier detection techniques in the literature. This study uses simulation technique for computer generated distributions and some real data sets for comparison purposes. The study also analyzes real life data sets and compares the baby birth weight data and stock returns, both of which are known to be skewed. These results will help us in making a choice of appropriate outlier detection technique for skewed data sets for different sample sizes which might be helpful in identifying underweight babies.
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یہ زمیں نعت ہے آسماں نعت ہے

یہ زمیں نعت ہے، آسماں نعت ہے
سوچیے تو یہ سارا جہاں نعت ہے

چاند تاروں کی ساری گزر گاہیں بھی
اور معراج کی کہکشاں نعت ہے

پھول کلیاں ، پرندوں کی سب بولیاں
ہر قدم ہر روش گلستاں نعت ہے

رقص کرتے بگولے بیابان میں
اور صحرا کی ریگِ رواں نعت ہے

موج ہو یا صدف ، قطرہ ہو یا گہر
اور دریا کا آبِ رواں نعت ہے

جنگلوں کی ہوا ہو کہ بادِصبا
صبحِ گُل ہو کہ شامِ خزاں نعت ہے

آیۂ اِنَّما ، سورۂ والضُّحیٰ
اور قرآن کا ہر بیاں نعت ہے

وجہِ تخلیق کون و مکاں آپؐ ہیں
اِس لیے حق یہ ہے کُل جہاں نعت ہے

صحیح البخاری کی کتب اور ابواب میں نظم و مناسبت تحقیقی جائزہ

In sahih Bukhari the reform’s of Imam Bukhari are present in various styles and artistically sahih Bukhari is an eximious book. But in this present confab we want to disuses such a topic which is about the colligation of sahih Bukhari’s parts and order. The intellectual advisability and  sequences called the order of the parlance, and some time many points are practical and various expediencies recondite in this order. With identity the object of the speaker is explicated e.g, he started the book with incipiency and it is brought first because the inspiration the provenance of admonition. He arranges “kitab-ul-Emam” of on the second because to have belief on Allah as “Rab” is the most preeminent and also the prerequisite. In the first Hdith انما الاعمال بالنيات is in the same order and we understand that candidness is not only enough in the outset but it should be obsessive on both the commencement and the verge. The advisability we understood is the deserts starts form intentness and suppress on the left. Imam Bukhari to words both radicals in the inception and completion of the book.

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The automated Sentiment Analysis is widely used in many domains to detect the emotional content in text. This research work aims to detect emotions encapsulated by the writer by means of a combination of statistical analysis and machine learning methods. Many supervised and unsupervised sentiment analysis have been proposed in literature. Majority of these techniques works for English languages sentiment analysis. Whereas Pakistani people?s use roman Urdu for social media sites but there is no technique focusing on roman Urdu text. So, in this research, Ideveloped a model to detect antisocial behavior and define emotional state. The model is taking Roman Urdu feeds as input to help identify the user behavior/mood. An in-depth analysis is be provided by comparing the developed model with other state-of-the-art techniques to justify it in terms of efficiency and effectiveness. I design and implement new algorithm that will detect Anti Social Behavior on roman Urdu using sentiment analysis techniques.