Mehran University Research Journal of Engineering and Technology

5

Authors: Chandio I.A., Talpur M.A.H., Memon F.A.

The AHP (Analytic Hierarchy Process) is a useful tool in decision making method for land-use planning. Hillside development often contains environmental constraints because of hilly topography. Planners and decision makers have a limited opportunity to implement innovative approaches in land-use planning decision making process. This paper discusses on a possible MCDA (Multi Criteria Decision Analysis) method of land suitability analysis for sustainable hillside development. A hierarchical structure model is developed for the land suitability analysis. Land-use planners can get benefit from MCDA techniques for hillside development projects and various kinds of land-use planning problems. Criteria are prioritized by the experts and a number of sub-criteria are set in order to select the best alternatives for sustainable hillside development by using AHP method. Various techniques and modules are available that can check uncertainty of a computed final decision by experts. CR (Consistency Ratio) method is used to examine the uncertainty in decision obtained by the experts. If CR is more than required CR standards that it can revise weights with minor changes in criteria judgements to check uncertainty in decision-making of land suitability analysis. The AHP steps can be used by using the EC (Expert Choice) decision support software automatically or manually. This paper intends to introduce MCDA as a policy design tool for planners and decision makers like an AHP application in land-use planning

7

Authors: Raza K., Syed H.A.

This paper proposes an intrusion detection technique based on DBN (Deep Belief Network) to classify four intrusion classes and one normal class using KDD-99 dataset. The proposed technique is based on two phases: in first phase it removes the class imbalance problem and in the next, it applies DBN followed by FFNN (Feed-Forward Neural Network) to build a prediction model. The obtained results are compared with those given in [9]. The prediction accuracy of our model shows promising results on both intrusion and normal patterns.

9

Authors: Soomro M.A., Halepoto I.A., Sahito A.A.

The recent development of semiconductor technology and wide spread use of power electronic devices in power system have open the era of the power system harmonics due to increasing penetration of non-linear loads. Harmonics are widely admitted as most important issues of power quality which must be eliminated to maintain power system reliability. The tolerable THD (Total Harmonic Distortion) values must be bounded in well-defined limits recognized by IEEE-519 standard. In this work, in order to eliminate the current harmonics produced by non-linear loads, six pulse multiplication converter technique in conjunction with STSSHPE (Single Tuned Shunt Harmonic Passive Filter) is proposed. The proposed model has the capacity of harmonic cancellation of the dominant 3rd order harmonics. Besides that, the 5th and 7th order harmonics are also reduced to a diminishing level. The hardware model has been experimentally tested by PQA (Power Quality Analyzer) and simulation model is designed using MATLAB software. The acquired results have been measured by considering THD values in terms of current and voltage. Furthermore, they have been compared against IEEE-519 performance standards. The prosed model, successfully bounds the total harmonic distortion under defined limits by IEEE-519 standard

10

Authors: Burdi M.K., Uqaili M.A., Memon M.R.

This paper teaches GME (Generalized Machine Theory) while investigating into Universal Motor?s Dynamic Behavior for both transient and steady-state on various load applications. Formation of GME Equations of the Universal Motor is explained by formation of the transient equations of equivalent circuit of the universal motor, by applying Kirchhoff?s Loop Law. They are numerically solved for transient behavior. After that the transient equations of the motor are converted into steady-state equivalent equations by replacing instantaneous currents and voltages into their rms values and substituting and then etc. and solving for steady-state solution. In each dynamic switching, transient and steady-state analysis, input power, current, power factor and speed of the motor are determined and plotted against common time and then analyzed. This research was essential to investigate the effect of applied load on input and output behavior of Universal Motor. Up to now, nobody has attempted to find effect of applied loads on performance of the Universal Motor. The results obtained for the dynamic steady state and transient characteristics are presented in graphical form and discussed.