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A Smart Methodology for Handling Missing Data in Time Series Datasets

Thesis Info

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External Link

Author

Muhammad Rehan Naeem

Institute

Virtual University of Pakistan

Institute Type

Public

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Software Engineering

Language

English

Link

http://vspace.vu.edu.pk/detail.aspx?id=255

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676721006838

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Missing information or missing data occurs when no data value is stored for any variable in the dataset. It is usually occurred and can have a substantial effect on the decisions. These days the treatment of the missing data is a real issue. In data quality, a severe threat is missing data which have a direct impact on the certainty of what is being presented to the end user. Imputation of missing values from predictive strategies created the idea that the influences accredited have some association with actual data. If these values did not have an association with actual data, it could produce uncertain results. There are different factual strategies of machine learning techniques like neural systems; genetic programming, and data mining strategies, which are utilized to impute such missing perceptions. In data analytics, predictive methodologies are exceptionally attractive because it can prompt better results. If there are missing data values in datasets certain machine algorithms cannot be applied to predict and forecast data. We can use different time series datasets of different organizations listed in the Pakistan Stock Exchange (PSX). The missing values can be discovered in these selected datasets. We have developed algorithms that can fill the missing dates in the datasets because some of the forecasting algorithms did not initially predict with missing values. The datasets with none missing values can be used for the training of some machine learning algorithms. The results based on different datasets of PSX can be used to forecast the next day value of the stock.
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والدہ مولانا سعید احمد اکبر آبادی

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Coverage Analysis for Gui Testing

Software Testing is one of the most critical phases in development of software. The aim of software testing is to create quality software products to meet the expectations of an organization. Software testing is considered as an effort demanding activity and hence it is often neglected to some extent. Graphical user interface (GUI) is a major contributing factor behind the popularity of software applications in recent times. Realizing the importance of GUI‟s, a lot of research concentrating on GUI is being carried out. Moreover the importance of ensuring the correctness of GUI is of higher value. That‟s why; a software development organization must have to manage the additional testing for the GUI. GUIs make testing systems more difficult because they inherit characteristics like event- driven nature, unsolicited events, and infinite input domain problems. The major benefit of a GUI is that it hides the complexity from the users and sometimes from programmers as wells. In the end testing such applications becomes a nightmare for test team. To reduce the effort required and shorten the duration of testing GUI, automated techniques and tools are being used now. A GUI model based on event-flow graph is an innovative technique being utilized in the field of automated GUI testing. The search for utmost quality assurance of software, through the introduction of automated software testing, raises yet another challenging question, what is the required “amount” of testing to gain confidence in quality of software? Usually this criterion corresponds to a function known as “coverage” that measures how much of the software is to be tested? Like procedural and command based software testing, same measure of coverage can be applied to GUI testing as well. In the course of the development of the techniques for the automation of the software/GUI testing procedure, this “coverage” measure can be employed to provide guidance on the quality of an automatic test suite. A fully automatic strategy has been developed for the generation of events to exploit the event flow nature of GUI‟s. Proposed methodology provides an analysis of GUI path test coverage based on these recorded events. A coverage analyzer using evolutionary algorithms optimization is proposed that performs analysis to maximize the GUI test coverage. The proposed technique uses different variants of Genetic Algorithms and Particle Swarm Optimization. Initially, the technique has been optimized with the aim to gain maximum test coverage and then other important attributes like cost and number of test cases have also been incorporated with the help of multi-objective optimization.Coverage Analysis for GUI Testing xi Based on the event driven nature of GUI, this thesis presents a GUI testing and coverage analysis technique centered on evolutionary algorithms. Technique proposes a design pattern based profile of GUI. This profile is further used to model the GUI and based on this modeling, testing process is started. Ontology based annotation process is used to generate test cases based on event driven nature of GUI systems. Test coverage analysis is used to ensure that maximum test coverage has been achieved. Different evolutionary algorithms have been used to optimize test coverage. Finally a test oracle based on semantic annotations and working of ontology is used to verify the output of test cases.