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International Conference on Robotics and Emerging Allied Technologies in engineering (iCREATE)

作者： syed Asad Hussain Muhammad Bilal Kadri Ayesha Rab Electronics and Power Engineering Department National University of Sciences and Technology (NUST) Islamabad Pakistan Sir Syed University of Engineering and Technology Karachi Pakistan

This paper focuses on stability of under-actuated two-link robot implemented over network control Systems. The proposed control system stabilizes and balances the robot in erect position. This paper differentiates synchronous and asynchronous actuation. Smith predictor has been used to handle dead time and control closed loop over asynchronous actuation. The simulation results demonstrate the efficiency of the proposed scheme.

关键词： Robots Delays Communication networks Actuators Network topology Topology

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Framework for impact analysis of green smart grid deployment in energy deficit countries

Communications in Computer and Information Science

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Communications in computer and Information Science 2013年 414卷

作者： Aamir, Muhammad Uqaili, Muhammad Aslam Chowdhry, Bhawani Shankar Rub, Raiyah Ali, Andaleeb Siddiqui, Mehwish Sir Syed University of Engineering and Technology Karachi Pakistan Mehran University of Engineering and Technology Jamshoro Pakistan

Conventional grids are unable to deliver the escalating demand for electricity in this era of ever-increasing demand. Considering the increased requirements motivates the evolution of green smart grid technology. The smart grid technology introduces the new information and control technologies (ICT) enable the optimized approach to plan advanced, automated and centralized controlled system for power distribution and transmission. This paper provides a comprehensive study on comparative assessment of green smart grid versus conventional grids through highlighting the various factors such as reduction of CO2 emission, self-healing and environment friendly, reliable operation, security provision, efficiency, cost management, energy empowerment, advance communication techniques, smart devices, smart controlling and monitoring, reduction in line losses and smart measurements. These factors will be used to propose an optimized solution based on green smart grid. The outcome of this research may be utilized to incorporate green technology in implementation of ICT infrastructure. © Springer International Publishing Switzerland 2014.

关键词： Smart power grids

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Solar Flares Data Analysis on application of Probability Distributions and Fractal Dimensions and a comparative analysis of North-South Hemispheric Solar Flares Data Behavior

Solar Flares Data Analysis on application of Probability Dis...

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The 4th Session of 2014 Workshop of Pakistan Academy of Sciences

作者： Danish Hassan Shaheen Abbas M.R.K Ansari Bulbul Jan Mathematical Sciences Research Centre Federal Urdu University of Arts Sciences and Technology KarachiPakistan Department of Mathematics Sir Syed Engineering University Institute of Space and Planetary Astrophysics University of Karachi

Since Solar Flares are associated with the *** flares have different length,duration and peakness in different intervals as sunspots *** Solar Flares index data starting from 1966 to2008(Monthly Flare Index Cycles "20,21,22,23") in both North and South hemisphere separately along with total Solar Flares *** paper compared the North,South and total hemispheric Solar Flares data in perspective of probability distributions such as Gamma,Log-Gamma and Chi-square which tested by Kolmogrove-Smirnov D-test and then their persistency by using fractal *** we estimate the Hurst exponent with the help of fractal *** dimension shows complex of the data while Hurst exponent represents smoothness of the *** the tested probability distributions in this paper show persistency and positively *** use of probability distributions allows to represents the uncertainties in the solar flares *** study will be helpful to verify the long term smoothness of data trends and conclude the results will be present so forecast values will be more accurate.

关键词： Solar Flares Gamma Distribution Log-Gamma Distribution Chi-Squared Distribution Fractal Dimension Hurst Exponent

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Comparative analysis of melodic pattern matching techniques for performance evaluation of singer

Comparative analysis of melodic pattern matching techniques ...

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IEEE International Conference on Multi Topic

作者： syed Abbas Ali Aisha Siddiqui Tahura Fatima Javeria Barkat Department of Computer and Information System Engineering NED University of Engineering and Technology Karachi Pakistan

Music has always been the vital part of entertainment. Musical schools and singing reality shows are very popular and have become an integral part of our daily life. They provide entertainment to the viewers and a platform to the willing contestants to show their talent. This paper introduces the idea for evaluating the performance of singers using melodic pattern matching techniques, namely LBDM (Local Boundary Detection Model) and DTW (Dynamic Time Warping) based on peaks extracted from the strength and pitches of the audio signal respectively. The audio corpus both standard and recorded song track from singer is maintained using SQL database consist of 5 different song track in MP3 format with duration of approximately 2.10 minutes. The experimental analysis provide the following observation from the comparison between LBDM and DTW with similar and different track singer in term of percentage efficiency; LBDM shows 99.99% matching and DTW shows 99.16% matching, whereas LBDM shows 45.89% matching and DTW shows 55.8% matching with similar and different track singers respectively. The experimental results clearly evident that LBDM provides significant results as compared to DTW.

关键词： Algorithm design and analysis Pattern matching Standards Feature extraction Music Computational modeling Heuristic algorithms

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Design and implementation of a pressure sensor on proteus

Communications in Computer and Information Science

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Communications in computer and Information Science 2013年 414卷 46-55页

作者： Amir, Samreen Siddiqui, Ali Akbar Ahmed, Nimrah Chowdhry, Bhawani Shankar Grout, Ian Sir Syed University of Engineering and Technology Karachi Pakistan Mehran University of Engineering and Technology Jamshoro Pakistan University of Limerick Limerick Ireland

This paper provides an overview of designing a Pressure sensor with its implementation on Proteus. We have worked on the concept of Autonomous Nodes with Control Unit (CU) and Master Unit (MU). When the pressure of gas increases in the pipe, the sensor senses it and the control unit will receive transmission from the active node, either to open or close the valve and actively communicates the result to master unit, whenever the status of signal changes. All the autonomous nodes are connected to MU. This system is designed to cope up with the excessive pressure of gas as to reduce the risk of accident. © Springer International Publishing Switzerland 2014.

关键词： Pressure sensors

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Software based acoustic modem

Communications in Computer and Information Science

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Communications in computer and Information Science 2013年 414卷 35-45页

作者： Amir, Samreen Saeed, Bilal Dawood, Mansoor Uz Zafar Soonka, Danish Ahmed, Nimrah Sir Syed University of Engineering and Technology Karachi Pakistan King Abdul Aziz University Jeddah Saudi Arabia

In this paper, an acoustic band based software modem is designed and implemented for wireless communication between two personal computers. Its based on an investigation of the theoretical techniques required to develop a modem capable of digital data transmission in an indoor airborne acoustic environment, and the subsequent software development. Text files are used as information to demonstrate the operation and are being built under MATLAB code, modem uses 4-QAM modulation scheme. To realize modem in real-time, the software is developed that converts text in to voice, which is then modulated and transmitted over wired or wireless medium and received on the microphone of the receiver side. This received voice is then again converted to the text and displayed on the computer screen. The design encompasses a significant proportion of the signal synthesis and recovery process is performed digitally in software so that the burden on analogue RF hardware is minimized. © Springer International Publishing Switzerland 2014.

关键词： Underwater acoustics

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On the contribution of power variance in PAPR reduction for OFDM signals

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International Journal of Autonomous and Adaptive Communications Systems 2013年第4期6卷 391-402页

作者： Hussain, Ibrahim M. Tasadduq, Imran A. Ahmad, Abdul-Rahim Department of Computer Engineering Sir Syed University of Engineering and Technology University Road 75300 Karachi Pakistan Department of Computer Engineering Umm Al-Qura University Makkah Al-Mukerrimah Saudi Arabia Systems Design Engineering University of Waterloo Waterloo ON Canada

In various literatures, it has been argued that the power variance (PV) can be used as a sound model of peak-to-average power ratio (PAPR) for decisions aimed at reducing the power of the transmitted orthogonal frequency division multiplexing (OFDM) signals. Hence, it has been argued in the past that the PV is a good measure when it comes to power efficiency of OFDM signals. We argue that this may not be always true and that the PV-based power reduction may give misleading results in efforts aimed at PAPR reduction. We support our argument using simulation results. Furthermore, we show that the PV-based comparison in selected mapping reduction technique gives a degraded PAPR performance compared to the actual PAPR-based comparison. Copyright © 2013 Inderscience Enterprises Ltd.

关键词： Peak to average power ratio

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Wind Speed Analysis of Some Coastal Areas near karachi

Wind Speed Analysis of Some Coastal Areas near Karachi

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The 1st Session of 2014 Workshop of Pakistan Academy of Sciences

作者： M.A.Hussain Shaheen Abbas M.R.K.Ansari Asma Zaffar Bulbul Jan Institute of Business and Technology Mathematical Sciences Research Centre Federal Urdu University of Arts Sciences & Technology Department of Mathematics Sir Syed University of Engineering

This communication attempts to analyze karachi coastal area(Paradise Point 24.84 o E, 66.77 o N)) for an understanding of underlying probability distribution. It has been found that at this site the annual wind speed at a height of 30 meters remains very close to 7 m/s whereas at a height of 61 meters the wind speed reaches to 9 m/s. Moreover, the wind mostly remains directed towards southwest. Furthermore, the annual average wind speed follows Weibull distribution and the annual average wind speed goes on increasing with the passage of time. Maximum energy together with the energy density for different values of the wind mill blade diameters is also calculated. Our analysis shows that the wind speed is increasing as a consequence of global climate change. Though the global climate change has created many threats to the humanity by influencing the local urban microclimate but the positive aspect of this finding is that the increase in wind speed will increase the feasibility and economic viability of the construction of wind farms near karachi coast and offshore. Of course these calculations will be useful for urban and energy planners.

关键词： Global warming,karachi Nuclear Power Complex(KNPC),maximum likelihood(ML),cumulative distribution function(cdf)

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Artificial neural network based electrocardiography analyzer

Artificial neural network based electrocardiography analyzer

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2013 3rd IEEE International Conference on computer, Control and Communication, IC4 2013

作者： Mehdi, Bushra Khan, Tahmina Ali, Zain Anwar Electronic Engineering Sir Syed University of Engineering and Technology Karachi Pakistan

ISBN: (纸本)9781467358859

At the present scenario, one of the main reasons of death is cardiovascular related diseases. This project proposes a system to help the doctor to detect cardiac arrhythmia. The techniques used in this pattern recognition comprise: signal pre-processing, filter design analysis and neural network toolboxes in Matlab environment. Normal and disease ECG signals have been tested by using recordings obtained from the Massachusetts Institute of technology Beth Israel Hospital (MIT-BIH) arrhythmia database. Supervised Radial Basis Function (RBF) network architecture is used for filtration, extraction of morphological features of ECG signal and for classification of abnormal cardiac conditions. Different threshold techniques were implemented for best detection of fudicial points on the derivative of the filtered ECG signal through signal processing. All fudicial points and intervals extracted were learned to the RBF network for extraction of features through the overall record which is further processed to ANN for classification. The designed network gives very minimum error in terms of 10-15. © 2013 IEEE.

关键词： Electrocardiograms

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Proposed implementable model of computer interfaced electrocardiogram (ECG) module

Proposed implementable model of computer interfaced electroc...

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4th International Conference on the Development of Biomedical engineering in Vietnam

作者： Ateeq, Ijlal Shahrukh Muzammil Khan, Kamranhameed Khalid, Junaid Ali, Muhammad Department of Biomedical Engineering Sir Syed University of Engineering and Technology Karachi Pakistan Department of Biomedical Engineering Karachi Institute of Radiotherapy and Nuclear Medicine Karachi Pakistan

ISBN: (纸本)9783642321825

Electrocardiogram measurement plays a fundamental role for the finding and monitoring of a variety of cardiac problems. In this investigational study we considered three lead computer interface ECG module with PIC Controller, based on the Einthoven's triangle technique. Our developed ECG module operates on bipolar limb lead arrangement and a particular gold plated switch is used for leads selection with the intention to reduce contact noises. LAB WINDOWS software is used to display a real time ECG signal that supports us to evaluate heart rate and PQRST amplitudes. Our investigational outcome illustrates 80% - 90 % precision as compared to conventional ECG machine, therefore it allowing an efficient ECG measurement regardless of artifacts. © 2013 IFMBE.

关键词： Electrocardiograms

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